diff options
author | Peter Breitenlohner <peb@mppmu.mpg.de> | 2015-03-27 07:33:08 +0000 |
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committer | Peter Breitenlohner <peb@mppmu.mpg.de> | 2015-03-27 07:33:08 +0000 |
commit | 5a249a9f3e29f0a636c640abbf4526f72813fefc (patch) | |
tree | 0b475da0497ccba711c5b7cddc44af69adf78041 /Build/source/libs/libpng/libpng-1.6.16/contrib | |
parent | 73110859573600055f9ff5c4a549ac975e2030b7 (diff) |
libpng 1.6.17
git-svn-id: svn://tug.org/texlive/trunk@36642 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/libpng/libpng-1.6.16/contrib')
122 files changed, 0 insertions, 40232 deletions
diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/README.txt b/Build/source/libs/libpng/libpng-1.6.16/contrib/README.txt deleted file mode 100644 index bcd433d3523..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/README.txt +++ /dev/null @@ -1,4 +0,0 @@ - -This "contrib" directory contains contributions which are not necessarily under -the libpng license, although all are open source. They are not part of -libpng proper and are not used for building the library. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/README deleted file mode 100644 index 535c8d3f76b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/README +++ /dev/null @@ -1,83 +0,0 @@ -OPERATING SYSTEM SPECIFIC ARM NEON DETECTION --------------------------------------------- - -Detection of the ability to exexcute ARM NEON on an ARM processor requires -operating system support. (The information is not available in user mode.) - -HOW TO USE THIS ---------------- - -This directory contains C code fragments that can be included in arm/arm_init.c -by setting the macro PNG_ARM_NEON_FILE to the file name in "" or <> at build -time. This setting is not recorded in pnglibconf.h and can be changed simply by -rebuilding arm/arm_init.o with the required macro definition. - -For any of this code to be used the ARM NEON code must be enabled and run time -checks must be supported. I.e.: - -#if PNG_ARM_NEON_OPT > 0 -#ifdef PNG_ARM_NEON_CHECK_SUPPORTED - -This is done in a 'configure' build by passing configure the argument: - - --enable-arm-neon=check - -Apart from the basic Linux implementation in contrib/arm-neon/linux.c this code -is unsupported. That means that it is not even compiled on a regular basis and -may be broken in any given minor release. - -FILE FORMAT ------------ - -Each file documents its testing status as of the last time it was tested (which -may have been a long time ago): - -STATUS: one of: - SUPPORTED: This indicates that the file is included in the regularly - performed test builds and bugs are fixed when discovered. - COMPILED: This indicates that the code did compile at least once. See the - more detailed description for the extent to which the result was - successful. - TESTED: This means the code was fully compiled into the libpng test programs - and these were run at least once. - -BUG REPORTS: an email address to which to send reports of problems - -The file is a fragment of C code. It should not define any 'extern' symbols; -everything should be static. It must define the function: - -static int png_have_neon(png_structp png_ptr); - -That function must return 1 if ARM NEON instructions are supported, 0 if not. -It must not execute png_error unless it detects a bug. A png_error will prevent -the reading of the PNG and in the future, writing too. - -BUG REPORTS ------------ - -If you mail a bug report for any file that is not SUPPORTED there may only be -limited response. Consider fixing it and sending a patch to fix the problem - -this is more likely to result in action. - -CONTRIBUTIONS -------------- - -You may send contributions of new implementations to -png-mng-implement@sourceforge.net. Please write code in strict C90 C where -possible. Obviously OS dependencies are to be expected. If you submit code you -must have the authors permission and it must have a license that is acceptable -to the current maintainer; in particular that license must permit modification -and redistribution. - -Please try to make the contribution a single file and give the file a clear and -unambiguous name that identifies the target OS. If multiple files really are -required put them all in a sub-directory. - -You must also be prepared to handle bug reports from users of the code, either -by joining the png-mng-implement mailing list or by providing an email for the -"BUG REPORTS" entry or both. Please make sure that the header of the file -contains the STATUS and BUG REPORTS fields as above. - -Please list the OS requirements as precisely as possible. Ideally you should -also list the environment in which the code has been tested and certainly list -any environments where you suspect it might not work. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/android-ndk.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/android-ndk.c deleted file mode 100644 index 7240123487d..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/android-ndk.c +++ /dev/null @@ -1,39 +0,0 @@ -/* contrib/arm-neon/android-ndk.c - * - * Copyright (c) 2014 Glenn Randers-Pehrson - * Written by John Bowler, 2014. - * Last changed in libpng 1.6.10 [March 6, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * SEE contrib/arm-neon/README before reporting bugs - * - * STATUS: COMPILED, UNTESTED - * BUG REPORTS: png-mng-implement@sourceforge.net - * - * png_have_neon implemented for the Android NDK, see: - * - * Documentation: - * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html - * http://code.google.com/p/android/issues/detail?id=49065 - * - * NOTE: this requires that libpng is built against the Android NDK and linked - * with an implementation of the Android ARM 'cpu-features' library. The code - * has been compiled only, not linked: no version of the library has been found, - * only the header files exist in the NDK. - */ -#include <cpu-features.h> - -static int -png_have_neon(png_structp png_ptr) -{ - /* This is a whole lot easier than the linux code, however it is probably - * implemented as below, therefore it is better to cache the result (these - * function calls may be slow!) - */ - PNG_UNUSED(png_ptr) - return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM && - (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/linux-auxv.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/linux-auxv.c deleted file mode 100644 index 696e297ef4c..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/linux-auxv.c +++ /dev/null @@ -1,120 +0,0 @@ -/* contrib/arm-neon/linux-auxv.c - * - * Copyright (c) 2014 Glenn Randers-Pehrson - * Written by Mans Rullgard, 2011. - * Last changed in libpng 1.6.10 [March 6, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * SEE contrib/arm-neon/README before reporting bugs - * - * STATUS: COMPILED, TESTED - * BUG REPORTS: png-mng-implement@sourceforge.net - * - * png_have_neon implemented for Linux versions which allow access to - * /proc/self/auxv. This is probably faster, cleaner and safer than the code to - * read /proc/cpuinfo in contrib/arm-neon/linux, however it is yet another piece - * of potentially untested code and has more complex dependencies than the code - * to read cpuinfo. - * - * This generic __linux__ implementation requires reading /proc/self/auxv and - * looking at each element for one that records NEON capabilities. - */ -#include <unistd.h> /* for POSIX 1003.1 */ -#include <errno.h> /* for EINTR */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <elf.h> -#include <asm/hwcap.h> - -/* A read call may be interrupted, in which case it returns -1 and sets errno to - * EINTR if nothing was done, otherwise (if something was done) a partial read - * may result. - */ -static size_t -safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes) -{ - size_t ntotal = 0; - char *buffer = png_voidcast(char*, buffer_in); - - while (nbytes > 0) - { - unsigned int nread; - int iread; - - /* Passing nread > INT_MAX to read is implementation defined in POSIX - * 1003.1, therefore despite the unsigned argument portable code must - * limit the value to INT_MAX! - */ - if (nbytes > INT_MAX) - nread = INT_MAX; - - else - nread = (unsigned int)/*SAFE*/nbytes; - - iread = read(fd, buffer, nread); - - if (iread == -1) - { - /* This is the devil in the details, a read can terminate early with 0 - * bytes read because of EINTR, yet it still returns -1 otherwise end - * of file cannot be distinguished. - */ - if (errno != EINTR) - { - png_warning(png_ptr, "/proc read failed"); - return 0; /* I.e., a permanent failure */ - } - } - - else if (iread < 0) - { - /* Not a valid 'read' result: */ - png_warning(png_ptr, "OS /proc read bug"); - return 0; - } - - else if (iread > 0) - { - /* Continue reading until a permanent failure, or EOF */ - buffer += iread; - nbytes -= (unsigned int)/*SAFE*/iread; - ntotal += (unsigned int)/*SAFE*/iread; - } - - else - return ntotal; - } - - return ntotal; /* nbytes == 0 */ -} - -static int -png_have_neon(png_structp png_ptr) -{ - int fd = open("/proc/self/auxv", O_RDONLY); - Elf32_auxv_t aux; - - /* Failsafe: failure to open means no NEON */ - if (fd == -1) - { - png_warning(png_ptr, "/proc/self/auxv open failed"); - return 0; - } - - while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux) - { - if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0) - { - close(fd); - return 1; - } - } - - close(fd); - return 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/linux.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/linux.c deleted file mode 100644 index abae9e33bf6..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/arm-neon/linux.c +++ /dev/null @@ -1,161 +0,0 @@ -/* contrib/arm-neon/linux.c - * - * Copyright (c) 2014 Glenn Randers-Pehrson - * Written by John Bowler, 2014. - * Last changed in libpng 1.6.16 [December 22, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * SEE contrib/arm-neon/README before reporting bugs - * - * STATUS: SUPPORTED - * BUG REPORTS: png-mng-implement@sourceforge.net - * - * png_have_neon implemented for Linux by reading the widely available - * pseudo-file /proc/cpuinfo. - * - * This code is strict ANSI-C and is probably moderately portable; it does - * however use <stdio.h> and it assumes that /proc/cpuinfo is never localized. - */ -#include <stdio.h> - -static int -png_have_neon(png_structp png_ptr) -{ - FILE *f = fopen("/proc/cpuinfo", "rb"); - - if (f != NULL) - { - /* This is a simple state machine which reads the input byte-by-byte until - * it gets a match on the 'neon' feature or reaches the end of the stream. - */ - static const char ch_feature[] = { 70, 69, 65, 84, 85, 82, 69, 83 }; - static const char ch_neon[] = { 78, 69, 79, 78 }; - - enum - { - StartLine, Feature, Colon, StartTag, Neon, HaveNeon, SkipTag, SkipLine - } state; - int counter; - - for (state=StartLine, counter=0;;) - { - int ch = fgetc(f); - - if (ch == EOF) - { - /* EOF means error or end-of-file, return false; neon at EOF is - * assumed to be a mistake. - */ - fclose(f); - return 0; - } - - switch (state) - { - case StartLine: - /* Match spaces at the start of line */ - if (ch <= 32) /* skip control characters and space */ - break; - - counter=0; - state = Feature; - /* FALL THROUGH */ - - case Feature: - /* Match 'FEATURE', ASCII case insensitive. */ - if ((ch & ~0x20) == ch_feature[counter]) - { - if (++counter == (sizeof ch_feature)) - state = Colon; - break; - } - - /* did not match 'feature' */ - state = SkipLine; - /* FALL THROUGH */ - - case SkipLine: - skipLine: - /* Skip everything until we see linefeed or carriage return */ - if (ch != 10 && ch != 13) - break; - - state = StartLine; - break; - - case Colon: - /* Match any number of space or tab followed by ':' */ - if (ch == 32 || ch == 9) - break; - - if (ch == 58) /* i.e. ':' */ - { - state = StartTag; - break; - } - - /* Either a bad line format or a 'feature' prefix followed by - * other characters. - */ - state = SkipLine; - goto skipLine; - - case StartTag: - /* Skip space characters before a tag */ - if (ch == 32 || ch == 9) - break; - - state = Neon; - counter = 0; - /* FALL THROUGH */ - - case Neon: - /* Look for 'neon' tag */ - if ((ch & ~0x20) == ch_neon[counter]) - { - if (++counter == (sizeof ch_neon)) - state = HaveNeon; - break; - } - - state = SkipTag; - /* FALL THROUGH */ - - case SkipTag: - /* Skip non-space characters */ - if (ch == 10 || ch == 13) - state = StartLine; - - else if (ch == 32 || ch == 9) - state = StartTag; - break; - - case HaveNeon: - /* Have seen a 'neon' prefix, but there must be a space or new - * line character to terminate it. - */ - if (ch == 10 || ch == 13 || ch == 32 || ch == 9) - { - fclose(f); - return 1; - } - - state = SkipTag; - break; - - default: - png_error(png_ptr, "png_have_neon: internal error (bug)"); - } - } - } - -#ifdef PNG_WARNINGS_SUPPORTED - else - png_warning(png_ptr, "/proc/cpuinfo open failed"); -#endif - - return 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/README deleted file mode 100644 index 0f472791f27..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/README +++ /dev/null @@ -1,49 +0,0 @@ -This directory contains test configuration files, currently always '.dfa' files -intended to be used in the build by setting the make macro DFA_XTRA to the name -of the file. - -These files are used in release validation of the 'configure' builds of libpng -by building 'make check', or 'make all-am' for cross-builds, with each .dfa -file. - -The files in this directory may change between minor releases, however -contributions describing specific builds of libpng are welcomed. There is no -guarantee that libpng will continue to build with such configurations; support -for given configurations can be, and has been, dropped between successive minor -releases. However if a .dfa file describing a configuration is not in this -directory it is very unlikely that it will be tested before a minor release! - -You can use these .dfa files as the basis of new configurations. Files in this -directory should not have any use restrictions or restrictive licenses. - -This directory is not included in the .zip and .7z distributions, which do -not contain 'configure' scripts. - -DOCUMENTATION -============= - -Examples: - ${srcdir}/pngusr.dfa - ${srcdir}/contrib/pngminim/*/pngusr.dfa - -Documentation of the options: - ${srcdir}/scripts/pnglibconf.dfa - -Documentation of the file format: - ${srcdir}/scripts/options.awk - -FILE NAMING -=========== - -File names in this directory may NOT contain any of the five characters: - - - , + * ? - -Neither may they contain any space character. - -While other characters may be used it is strongly suggested that file names be -limited to lower case Latiin alphabetic characters (a-z), digits (0-9) and, if -necessary the underscore (_) character. File names should be about 8 characters -long (excluding the .dfa extension). Submitted .dfa files should have names -between 7 and 16 characters long, shorter names (6 characters or less) are -reserved for standard tests. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/read.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/read.dfa deleted file mode 100644 index 21e88d01a21..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/read.dfa +++ /dev/null @@ -1,58 +0,0 @@ -# read.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with basic read support. This enables the lowest level libpng -# read API - the one where the calling code has to use a loop to read each row. -# At present this is the API used by most programs. -# -# Support is enabled only for those chunks and transformations that are -# typically required - others can be added easily. -# - -everything = off - -# The sequential read code is enabled here; the progressive code can be used -# instead but there is no point enabling both. - -option SEQUENTIAL_READ on - -# Likewise it is pointless enabling both fixed and floating point APIs. Choose -# one or the other for both the API and the internal math. - -#Fixed point: -#option FIXED_POINT on -#option FLOATING_ARITHMETIC off - -#Floating point: -option FLOATING_POINT on -option FLOATING_ARITHMETIC on - -# Basic error handling, IO and user memory support. The latter allows the -# application program to provide its own implementations of 'malloc' and 'free'. -option SETJMP on -option STDIO on -option USER_MEM on - -# To read the full set of PNG images correctly interlace, transparency and -# 16-bit support is required. The application can implement interlace itself, -# but very few do and it's no longer possible to disable it when READ is -# enabled. -option READ_tRNS on -option READ_16BIT on - -# Everything else is application dependent. This file assumes the app handles -# all the native PNG bit layouts, so it doesn't need any of layout change -# transforms, but needs libpng to perform gamma correction. It doesn't do any -# colorspace stuff and ignores the 'significant bit' information. -# -# If your app always expands the image to a limited set of bit layouts you -# probably want to consider using the simplified API instead of the low level -# one - see png.h and s_read.dfa. -option READ_GAMMA on diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/s_read.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/s_read.dfa deleted file mode 100644 index cb1ce0ba65f..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/s_read.dfa +++ /dev/null @@ -1,35 +0,0 @@ -# s_read.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with simplified read support (only). This builds a minimal -# libpng able to read all PNG formats and convert them into a small number of -# well understood memory formats. -# - -everything = off - -option SIMPLIFIED_READ on - -# It isn't necessary to chose fixed or floating point for the APIs because the -# simplified API doesn't need fixed or floating point numbers. It is necessary -# to chose an internal math implementation. The default (because of 'everything -# = off') is fixed point - turn the floating point implementation on if you have -# hardware floating point or prefer your software floating point implementation. -option FLOATING_ARITHMETIC on - -# This is not strictly necessary, but without it the message strings in the API -# will not be filled in -option ERROR_TEXT on - -# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't -# need this if you don't use them, they just allow the in-memory layout to be -# changed to match common hardware formats. -option SIMPLIFIED_READ_AFIRST on -option SIMPLIFIED_READ_BGR on diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/s_write.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/s_write.dfa deleted file mode 100644 index e540a46dc8b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/s_write.dfa +++ /dev/null @@ -1,33 +0,0 @@ -# s_write.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with (just) simplified write support -# - -everything = off - -option SIMPLIFIED_WRITE on - -# It isn't necessary to chose fixed or floating point for the APIs because the -# simplified API doesn't need fixed or floating point numbers. It is necessary -# to chose an internal math implementation. The default (because of 'everything -# = off') is fixed point - turn the floating point implementation on if you have -# hardware floating point or prefer your software floating point implementation. -option FLOATING_ARITHMETIC on - -# This is not strictly necessary, but without it the message strings in the API -# will not be filled in -option ERROR_TEXT on - -# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't -# need this if you don't use them, they just allow the in-memory layout to be -# changed to match common hardware formats. -option SIMPLIFIED_WRITE_AFIRST on -option SIMPLIFIED_WRITE_BGR on diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/simple.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/simple.dfa deleted file mode 100644 index 04193334452..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/simple.dfa +++ /dev/null @@ -1,36 +0,0 @@ -# simple.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with just the simplified APIs (read and write). -# - -everything = off - -option SIMPLIFIED_WRITE on -option SIMPLIFIED_READ on - -# It isn't necessary to chose fixed or floating point for the APIs because the -# simplified API doesn't need fixed or floating point numbers. It is necessary -# to chose an internal math implementation. The default (because of 'everything -# = off') is fixed point - turn the floating point implementation on if you have -# hardware floating point or prefer your software floating point implementation. -option FLOATING_ARITHMETIC on - -# This is not strictly necessary, but without it the message strings in the API -# will not be filled in -option ERROR_TEXT on - -# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't -# need this if you don't use them, they just allow the in-memory layout to be -# changed to match common hardware formats. -option SIMPLIFIED_READ_AFIRST on -option SIMPLIFIED_READ_BGR on -option SIMPLIFIED_WRITE_AFIRST on -option SIMPLIFIED_WRITE_BGR on diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/write.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/write.dfa deleted file mode 100644 index 3319aabeeb3..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/conftest/write.dfa +++ /dev/null @@ -1,45 +0,0 @@ -# write.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with no read support and minimal write support. -# - -everything = off - -# Switch on the write code - this makes a minimalist encoder - -option WRITE on - -# Choose fixed or floating point APIs and arithmetic. The choices are -# independent but normally they will match. It is typically better to use the -# floating point if you have floating point hardware. If you don't know, or -# (perhaps) to make libpng smaller used fixed point throughout. - -#Fixed point: -#option FIXED_POINT on -#option FLOATING_ARITHMETIC off - -#Floating point: -option FLOATING_POINT on -option FLOATING_ARITHMETIC on - -# Basic error handling, IO and user memory support. The latter allows the -# application program to provide its own implementations of 'malloc' and 'free'. -option SETJMP on -option STDIO on -option USER_MEM on - -# Everything else is optional. Unlike the read code in libpng the write code -# does not need to deal with arbitrary formats, so only add support for things -# you really do write! For example you might only write sRGB images, sometimes -# with transparency and never write 16 bit images, so: -option WRITE_sRGB on -option WRITE_tRNS on -#option WRITE_16BIT off (this is the default with 'everything = off') diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/README.txt b/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/README.txt deleted file mode 100644 index 0525c9d36b4..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/README.txt +++ /dev/null @@ -1,24 +0,0 @@ - -This directory (contrib/examples) contains examples of libpng usage. - -NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY. - -To the extent possible under law, the authors have waived all copyright and -related or neighboring rights to this work. This work is published from: -United States. - -The files may be used freely in any way. The intention is that appropriate -parts of the files be used in other libpng-using programs without any need for -the authors of the using code to seek copyright or license from the original -authors. - -The source code and comments in this directory are the original work of the -people named below. No other person or organization has made contributions to -the work in this directory. - -ORIGINAL AUTHORS - The following people have contributed to the code in this directory. None - of the people below claim any rights with regard to the contents of this - directory. - - John Bowler <jbowler@acm.org> diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/iccfrompng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/iccfrompng.c deleted file mode 100644 index 386e522a334..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/iccfrompng.c +++ /dev/null @@ -1,180 +0,0 @@ -/*- iccfrompng - * - * COPYRIGHT: Written by John Cunningham Bowler, 2011. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Extract any icc profiles found in the given PNG files. This is a simple - * example of a program that extracts information from the header of a PNG file - * without processing the image. Notice that some header information may occur - * after the image data. Textual data and comments are an example; the approach - * in this file won't work reliably for such data because it only looks for the - * information in the section of the file that preceeds the image data. - * - * Compile and link against libpng and zlib, plus anything else required on the - * system you use. - * - * To use supply a list of PNG files containing iCCP chunks, the chunks will be - * extracted to a similarly named file with the extension replaced by 'icc', - * which will be overwritten without warning. - */ -#include <stdlib.h> -#include <setjmp.h> -#include <string.h> -#include <stdio.h> - -#include <png.h> - -static int verbose = 1; -static png_byte no_profile[] = "no profile"; - -static png_bytep -extract(FILE *fp, png_uint_32 *proflen) -{ - png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); - png_infop info_ptr = NULL; - png_bytep result = NULL; - - /* Initialize for error or no profile: */ - *proflen = 0; - - if (png_ptr == NULL) - { - fprintf(stderr, "iccfrompng: version library mismatch?\n"); - return 0; - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 0; - } - - png_init_io(png_ptr, fp); - - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - png_error(png_ptr, "OOM allocating info structure"); - - png_read_info(png_ptr, info_ptr); - - { - png_charp name; - int compression_type; - png_bytep profile; - - if (png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, &profile, - proflen) & PNG_INFO_iCCP) - { - result = malloc(*proflen); - if (result != NULL) - memcpy(result, profile, *proflen); - - else - png_error(png_ptr, "OOM allocating profile buffer"); - } - - else - result = no_profile; - } - - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return result; -} - -static int -extract_one_file(const char *filename) -{ - int result = 0; - FILE *fp = fopen(filename, "rb"); - - if (fp != NULL) - { - png_uint_32 proflen = 0; - png_bytep profile = extract(fp, &proflen); - - if (profile != NULL && profile != no_profile) - { - size_t len; - char *output; - - { - const char *ep = strrchr(filename, '.'); - - if (ep != NULL) - len = ep-filename; - - else - len = strlen(filename); - } - - output = malloc(len + 5); - if (output != NULL) - { - FILE *of; - - memcpy(output, filename, len); - strcpy(output+len, ".icc"); - - of = fopen(output, "wb"); - if (of != NULL) - { - if (fwrite(profile, proflen, 1, of) == 1 && - fflush(of) == 0 && - fclose(of) == 0) - { - if (verbose) - printf("%s -> %s\n", filename, output); - /* Success return */ - result = 1; - } - - else - { - fprintf(stderr, "%s: error writing profile\n", output); - if (remove(output)) - fprintf(stderr, "%s: could not remove file\n", output); - } - } - - else - fprintf(stderr, "%s: failed to open output file\n", output); - - free(output); - } - - else - fprintf(stderr, "%s: OOM allocating string!\n", filename); - - free(profile); - } - - else if (verbose && profile == no_profile) - printf("%s has no profile\n", filename); - } - - else - fprintf(stderr, "%s: could not open file\n", filename); - - return result; -} - -int -main(int argc, char **argv) -{ - int i; - int extracted = 0; - - for (i=1; i<argc; ++i) - { - if (strcmp(argv[i], "-q") == 0) - verbose = 0; - - else if (extract_one_file(argv[i])) - extracted = 1; - } - - /* Exit code is true if any extract succeeds */ - return extracted == 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/pngpixel.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/pngpixel.c deleted file mode 100644 index e0d43e3f09b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/pngpixel.c +++ /dev/null @@ -1,368 +0,0 @@ -/*- pngpixel - * - * COPYRIGHT: Written by John Cunningham Bowler, 2011. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Read a single pixel value from a PNG file. - * - * This code illustrates basic 'by-row' reading of a PNG file using libpng. - * Rows are read until a particular pixel is found; the value of this pixel is - * then printed on stdout. - * - * The code illustrates how to do this on interlaced as well as non-interlaced - * images. Normally you would call png_set_interlace_handling() to have libpng - * deal with the interlace for you, but that obliges you to buffer half of the - * image to assemble the interlaced rows. In this code - * png_set_interlace_handling() is not called and, instead, the code handles the - * interlace passes directly looking for the required pixel. - */ -#include <stdlib.h> -#include <stdio.h> -#include <setjmp.h> /* required for error handling */ - -/* Normally use <png.h> here to get the installed libpng, but this is done to - * ensure the code picks up the local libpng implementation: - */ -#include "../../png.h" - -/* Return component 'c' of pixel 'x' from the given row. */ -static unsigned int -component(png_const_bytep row, png_uint_32 x, unsigned int c, - unsigned int bit_depth, unsigned int channels) -{ - /* PNG images can be up to 2^31 pixels wide, but this means they can be up to - * 2^37 bits wide (for a 64-bit pixel - the largest possible) and hence 2^34 - * bytes wide. Since the row fitted into memory, however, the following must - * work: - */ - png_uint_32 bit_offset_hi = bit_depth * ((x >> 6) * channels); - png_uint_32 bit_offset_lo = bit_depth * ((x & 0x3f) * channels + c); - - row = (png_const_bytep)(((PNG_CONST png_byte (*)[8])row) + bit_offset_hi); - row += bit_offset_lo >> 3; - bit_offset_lo &= 0x07; - - /* PNG pixels are packed into bytes to put the first pixel in the highest - * bits of the byte and into two bytes for 16-bit values with the high 8 bits - * first, so: - */ - switch (bit_depth) - { - case 1: return (row[0] >> (7-bit_offset_lo)) & 0x01; - case 2: return (row[0] >> (6-bit_offset_lo)) & 0x03; - case 4: return (row[0] >> (4-bit_offset_lo)) & 0x0f; - case 8: return row[0]; - case 16: return (row[0] << 8) + row[1]; - default: - /* This should never happen; it indicates a bug in this program or in - * libpng itself: - */ - fprintf(stderr, "pngpixel: invalid bit depth %u\n", bit_depth); - exit(1); - } -} - -/* Print a pixel from a row returned by libpng; determine the row format, find - * the pixel, and print the relevant information to stdout. - */ -static void -print_pixel(png_structp png_ptr, png_infop info_ptr, png_const_bytep row, - png_uint_32 x) -{ - PNG_CONST unsigned int bit_depth = png_get_bit_depth(png_ptr, info_ptr); - - switch (png_get_color_type(png_ptr, info_ptr)) - { - case PNG_COLOR_TYPE_GRAY: - printf("GRAY %u\n", component(row, x, 0, bit_depth, 1)); - return; - - /* The palette case is slightly more difficult - the palette and, if - * present, the tRNS ('transparency', though the values are really - * opacity) data must be read to give the full picture: - */ - case PNG_COLOR_TYPE_PALETTE: - { - PNG_CONST unsigned int index = component(row, x, 0, bit_depth, 1); - png_colorp palette = NULL; - int num_palette = 0; - - if ((png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette) & - PNG_INFO_PLTE) && num_palette > 0 && palette != NULL) - { - png_bytep trans_alpha = NULL; - int num_trans = 0; - if ((png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans, - NULL) & PNG_INFO_tRNS) && num_trans > 0 && - trans_alpha != NULL) - printf("INDEXED %u = %d %d %d %d\n", index, - palette[index].red, palette[index].green, - palette[index].blue, - index < num_trans ? trans_alpha[index] : 255); - - else /* no transparency */ - printf("INDEXED %u = %d %d %d\n", index, - palette[index].red, palette[index].green, - palette[index].blue); - } - - else - printf("INDEXED %u = invalid index\n", index); - } - return; - - case PNG_COLOR_TYPE_RGB: - printf("RGB %u %u %u\n", component(row, x, 0, bit_depth, 3), - component(row, x, 1, bit_depth, 3), - component(row, x, 2, bit_depth, 3)); - return; - - case PNG_COLOR_TYPE_GRAY_ALPHA: - printf("GRAY+ALPHA %u %u\n", component(row, x, 0, bit_depth, 2), - component(row, x, 1, bit_depth, 2)); - return; - - case PNG_COLOR_TYPE_RGB_ALPHA: - printf("RGBA %u %u %u %u\n", component(row, x, 0, bit_depth, 4), - component(row, x, 1, bit_depth, 4), - component(row, x, 2, bit_depth, 4), - component(row, x, 3, bit_depth, 4)); - return; - - default: - png_error(png_ptr, "pngpixel: invalid color type"); - } -} - -int main(int argc, const char **argv) -{ - /* This program uses the default, <setjmp.h> based, libpng error handling - * mechanism, therefore any local variable that exists before the call to - * setjmp and is changed after the call to setjmp returns successfully must - * be declared with 'volatile' to ensure that their values don't get - * destroyed by longjmp: - */ - volatile int result = 1/*fail*/; - - if (argc == 4) - { - long x = atol(argv[1]); - long y = atol(argv[2]); - FILE *f = fopen(argv[3], "rb"); - volatile png_bytep row = NULL; - - if (f != NULL) - { - /* libpng requires a callback function for handling errors; this - * callback must not return. The default callback function uses a - * stored <setjmp.h> style jmp_buf which is held in a png_struct and - * writes error messages to stderr. Creating the png_struct is a - * little tricky; just copy the following code. - */ - png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, - NULL, NULL, NULL); - - if (png_ptr != NULL) - { - png_infop info_ptr = png_create_info_struct(png_ptr); - - if (info_ptr != NULL) - { - /* Declare stack variables to hold pointers to locally allocated - * data. - */ - - /* Initialize the error control buffer: */ - if (setjmp(png_jmpbuf(png_ptr)) == 0) - { - png_uint_32 width, height; - int bit_depth, color_type, interlace_method, - compression_method, filter_method; - png_bytep row_tmp; - - /* Now associate the recently opened (FILE*) with the default - * libpng initialization functions. Sometimes libpng is - * compiled without stdio support (it can be difficult to do - * in some environments); in that case you will have to write - * your own read callback to read data from the (FILE*). - */ - png_init_io(png_ptr, f); - - /* And read the first part of the PNG file - the header and - * all the information up to the first pixel. - */ - png_read_info(png_ptr, info_ptr); - - /* This fills in enough information to tell us the width of - * each row in bytes, allocate the appropriate amount of - * space. In this case png_malloc is used - it will not - * return if memory isn't available. - */ - row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, - info_ptr)); - - /* To avoid the overhead of using a volatile auto copy row_tmp - * to a local here - just use row for the png_free below. - */ - row_tmp = row; - - /* All the information we need is in the header is returned by - * png_get_IHDR, if this fails we can now use 'png_error' to - * signal the error and return control to the setjmp above. - */ - if (png_get_IHDR(png_ptr, info_ptr, &width, &height, - &bit_depth, &color_type, &interlace_method, - &compression_method, &filter_method)) - { - int passes, pass; - - /* png_set_interlace_handling returns the number of - * passes required as well as turning on libpng's - * handling, but since we do it ourselves this is - * necessary: - */ - switch (interlace_method) - { - case PNG_INTERLACE_NONE: - passes = 1; - break; - - case PNG_INTERLACE_ADAM7: - passes = PNG_INTERLACE_ADAM7_PASSES; - break; - - default: - png_error(png_ptr, "pngpixel: unknown interlace"); - } - - /* Now read the pixels, pass-by-pass, row-by-row: */ - png_start_read_image(png_ptr); - - for (pass=0; pass<passes; ++pass) - { - png_uint_32 ystart, xstart, ystep, xstep; - png_uint_32 py; - - if (interlace_method == PNG_INTERLACE_ADAM7) - { - /* Sometimes the whole pass is empty because the - * image is too narrow or too short. libpng - * expects to be called for each row that is - * present in the pass, so it may be necessary to - * skip the loop below (over py) if the image is - * too narrow. - */ - if (PNG_PASS_COLS(width, pass) == 0) - continue; - - /* We need the starting pixel and the offset - * between each pixel in this pass; use the macros - * in png.h: - */ - xstart = PNG_PASS_START_COL(pass); - ystart = PNG_PASS_START_ROW(pass); - xstep = PNG_PASS_COL_OFFSET(pass); - ystep = PNG_PASS_ROW_OFFSET(pass); - } - - else - { - ystart = xstart = 0; - ystep = xstep = 1; - } - - /* To find the pixel, loop over 'py' for each pass - * reading a row and then checking to see if it - * contains the pixel. - */ - for (py = ystart; py < height; py += ystep) - { - png_uint_32 px, ppx; - - /* png_read_row takes two pointers. When libpng - * handles the interlace the first is filled in - * pixel-by-pixel, and the second receives the same - * pixels but they are replicated across the - * unwritten pixels so far for each pass. When we - * do the interlace, however, they just contain - * the pixels from the interlace pass - giving - * both is wasteful and pointless, so we pass a - * NULL pointer. - */ - png_read_row(png_ptr, row_tmp, NULL); - - /* Now find the pixel if it is in this row; there - * are, of course, much better ways of doing this - * than using a for loop: - */ - if (y == py) for (px = xstart, ppx = 0; - px < width; px += xstep, ++ppx) if (x == px) - { - /* 'ppx' is the index of the pixel in the row - * buffer. - */ - print_pixel(png_ptr, info_ptr, row_tmp, ppx); - - /* Now terminate the loops early - we have - * found and handled the required data. - */ - goto pass_loop_end; - } /* x loop */ - } /* y loop */ - } /* pass loop */ - - /* Finally free the temporary buffer: */ - pass_loop_end: - row = NULL; - png_free(png_ptr, row_tmp); - } - - else - png_error(png_ptr, "pngpixel: png_get_IHDR failed"); - - } - - else - { - /* Else libpng has raised an error. An error message has - * already been output, so it is only necessary to clean up - * locally allocated data: - */ - if (row != NULL) - { - /* The default implementation of png_free never errors out - * (it just crashes if something goes wrong), but the safe - * way of using it is still to clear 'row' before calling - * png_free: - */ - png_bytep row_tmp = row; - row = NULL; - png_free(png_ptr, row_tmp); - } - } - - png_destroy_info_struct(png_ptr, &info_ptr); - } - - else - fprintf(stderr, "pngpixel: out of memory allocating png_info\n"); - - png_destroy_read_struct(&png_ptr, NULL, NULL); - } - - else - fprintf(stderr, "pngpixel: out of memory allocating png_struct\n"); - } - - else - fprintf(stderr, "pngpixel: %s: could not open file\n", argv[3]); - } - - else - /* Wrong number of arguments */ - fprintf(stderr, "pngpixel: usage: pngpixel x y png-file\n"); - - return result; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/pngtopng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/pngtopng.c deleted file mode 100644 index b1b3be677b9..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/examples/pngtopng.c +++ /dev/null @@ -1,92 +0,0 @@ -/*- pngtopng - * - * COPYRIGHT: Written by John Cunningham Bowler, 2011. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Read a PNG and write it out in a fixed format, using the 'simplified API' - * that was introduced in libpng-1.6.0. - * - * This sample code is just the code from the top of 'example.c' with some error - * handling added. See example.c for more comments. - */ -#include <stddef.h> -#include <stdlib.h> -#include <string.h> -#include <stdio.h> - -/* Normally use <png.h> here to get the installed libpng, but this is done to - * ensure the code picks up the local libpng implementation: - */ -#include "../../png.h" - -int main(int argc, const char **argv) -{ - int result = 1; - - if (argc == 3) - { - png_image image; - - /* Only the image structure version number needs to be set. */ - memset(&image, 0, sizeof image); - image.version = PNG_IMAGE_VERSION; - - if (png_image_begin_read_from_file(&image, argv[1])) - { - png_bytep buffer; - - /* Change this to try different formats! If you set a colormap format - * then you must also supply a colormap below. - */ - image.format = PNG_FORMAT_RGBA; - - buffer = malloc(PNG_IMAGE_SIZE(image)); - - if (buffer != NULL) - { - if (png_image_finish_read(&image, NULL/*background*/, buffer, - 0/*row_stride*/, NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP */)) - { - if (png_image_write_to_file(&image, argv[2], - 0/*convert_to_8bit*/, buffer, 0/*row_stride*/, - NULL/*colormap*/)) - result = 0; - - else - fprintf(stderr, "pngtopng: write %s: %s\n", argv[2], - image.message); - - free(buffer); - } - - else - { - fprintf(stderr, "pngtopng: read %s: %s\n", argv[1], - image.message); - - /* This is the only place where a 'free' is required; libpng does - * the cleanup on error and success, but in this case we couldn't - * complete the read because of running out of memory. - */ - png_image_free(&image); - } - } - - else - fprintf(stderr, "pngtopng: out of memory: %lu bytes\n", - (unsigned long)PNG_IMAGE_SIZE(image)); - } - - else - /* Failed to read the first argument: */ - fprintf(stderr, "pngtopng: %s: %s\n", argv[1], image.message); - } - - else - /* Wrong number of arguments */ - fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n"); - - return result; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/COPYING b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/COPYING deleted file mode 100644 index a3e97747969..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/COPYING +++ /dev/null @@ -1,340 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 2, June 1991 - - Copyright (C) 1989, 1991 Free Software Foundation, Inc. - 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The licenses for most software are designed to take away your -freedom to share and change it. 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It is safest -to attach them to the start of each source file to most effectively -convey the exclusion of warranty; and each file should have at least -the "copyright" line and a pointer to where the full notice is found. - - <one line to give the program's name and a brief idea of what it does.> - Copyright (C) <year> <name of author> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - -Also add information on how to contact you by electronic and paper mail. - -If the program is interactive, make it output a short notice like this -when it starts in an interactive mode: - - Gnomovision version 69, Copyright (C) year name of author - Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, the commands you use may -be called something other than `show w' and `show c'; they could even be -mouse-clicks or menu items--whatever suits your program. - -You should also get your employer (if you work as a programmer) or your -school, if any, to sign a "copyright disclaimer" for the program, if -necessary. Here is a sample; alter the names: - - Yoyodyne, Inc., hereby disclaims all copyright interest in the program - `Gnomovision' (which makes passes at compilers) written by James Hacker. - - <signature of Ty Coon>, 1 April 1989 - Ty Coon, President of Vice - -This General Public License does not permit incorporating your program into -proprietary programs. If your program is a subroutine library, you may -consider it more useful to permit linking proprietary applications with the -library. If this is what you want to do, use the GNU Library General -Public License instead of this License. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/LICENSE b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/LICENSE deleted file mode 100644 index d9567178cb6..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/LICENSE +++ /dev/null @@ -1,50 +0,0 @@ - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - --------------------------------------------------------------------------- diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.mingw32 b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.mingw32 deleted file mode 100644 index 3a3ff607e81..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.mingw32 +++ /dev/null @@ -1,131 +0,0 @@ -# Sample makefile for rpng-win / rpng2-win / wpng using mingw32-gcc and make. -# Greg Roelofs -# Last modified: 2 June 2007 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Well, OK, it's not -# generally for sale anymore, but it's the thought that counts, -# right? (Hint: http://www.libpng.org/pub/png/book/ ) -# -# Invoke this makefile from a DOS-prompt window via: -# -# make -f Makefile.mingw32 -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are in subdirectories at the same level as the current subdirectory -# (as indicated by the PNGDIR and ZDIR macros below). It makes no assumptions -# at all about the mingw32 installation tree (W32DIR). Edit as appropriate. -# -# Note that the names of the dynamic and static libpng and zlib libraries -# used below may change in later releases of the libraries. This makefile -# builds both statically and dynamically linked executables by default. -# (You need only one set, but for testing it can be handy to have both.) - - -# macros -------------------------------------------------------------------- - -#PNGDIR = ../..# for libpng-x.y.z/contrib/gregbook builds -PNGDIR = ../libpng-win32 -PNGINC = -I$(PNGDIR) -PNGLIBd = $(PNGDIR)/libpng.dll.a # dynamically linked -PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng - -#ZDIR = ../../../zlib-win32# for libpng-x.y.z/contrib/gregbook builds -ZDIR = ../zlib-win32 -ZINC = -I$(ZDIR) -ZLIBd = $(ZDIR)/libzdll.a -ZLIBs = $(ZDIR)/libz.a - -# change this to be the path where mingw32 installs its stuff: -W32DIR = -#W32DIR = /usr/local/cross-tools/i386-mingw32msvc -W32INC = -I$(W32DIR)/include -W32LIB = $(W32DIR)/lib/libuser32.a $(W32DIR)/lib/libgdi32.a - -CC = gcc -#CC = i386-mingw32msvc-gcc # e.g., Linux -> Win32 cross-compilation -LD = $(CC) -RM = rm -f -CPPFLAGS = $(INCS) -CFLAGS = -O -Wall $(MINGW_CCFLAGS) -# [note that -Wall is a gcc-specific compilation flag ("most warnings on")] -# [-ansi, -pedantic and -W can also be used] -LDFLAGS = $(MINGW_LDFLAGS) -O = .o -E = .exe - -INCS = $(PNGINC) $(ZINC) $(W32INC) -RLIBSd = $(PNGLIBd) $(ZLIBd) $(W32LIB) -lm -RLIBSs = $(PNGLIBs) $(ZLIBs) $(W32LIB) -lm -WLIBSd = $(PNGLIBd) $(ZLIBd) -WLIBSs = $(PNGLIBs) $(ZLIBs) - -RPNG = rpng-win -RPNG2 = rpng2-win -WPNG = wpng - -ROBJSd = $(RPNG)$(O) readpng.pic$(O) -ROBJS2d = $(RPNG2)$(O) readpng2.pic$(O) -WOBJSd = $(WPNG)$(O) writepng.pic$(O) - -RPNGs = $(RPNG)-static -RPNG2s = $(RPNG2)-static -WPNGs = $(WPNG)-static - -ROBJSs = $(RPNG)$(O) readpng$(O) -ROBJS2s = $(RPNG2)$(O) readpng2$(O) -WOBJSs = $(WPNG)$(O) writepng$(O) - -STATIC_EXES = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E) -DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - -EXES = $(STATIC_EXES) $(DYNAMIC_EXES) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - -%.pic$(O): %.c - $(CC) -c $(CPPFLAGS) $(CFLAGS) -DPNG_BUILD_DLL -o $@ $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNGs)$(E): $(ROBJSs) - $(LD) $(LDFLAGS) -o $@ $(ROBJSs) $(RLIBSs) - -$(RPNG)$(E): $(ROBJSd) - $(LD) $(LDFLAGS) -o $@ $(ROBJSd) $(RLIBSd) - -$(RPNG2s)$(E): $(ROBJS2s) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2s) $(RLIBSs) - -$(RPNG2)$(E): $(ROBJS2d) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2d) $(RLIBSd) - -$(WPNGs)$(E): $(WOBJSs) - $(LD) $(LDFLAGS) -o $@ $(WOBJSs) $(WLIBSs) - -$(WPNG)$(E): $(WOBJSd) - $(LD) $(LDFLAGS) -o $@ $(WOBJSd) $(WLIBSd) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O) readpng.pic$(O): readpng.c readpng.h -readpng2$(O) readpng2.pic$(O): readpng2.c readpng2.h -writepng$(O) writepng.pic$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: - $(RM) $(EXES) - $(RM) $(ROBJSs) $(ROBJS2s) $(WOBJSs) - $(RM) $(ROBJSd) $(ROBJS2d) $(WOBJSd) diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.sgi b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.sgi deleted file mode 100644 index 94d61b4652c..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.sgi +++ /dev/null @@ -1,105 +0,0 @@ -# Sample makefile for rpng-x / rpng2-x / wpng for SGI using cc and make. -# Greg Roelofs -# Last modified: 7 March 2002 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Buy some for friends -# and family, too. (Not that this is a blatant plug or anything.) -# -# Invoke this makefile from a shell prompt in the usual way; for example: -# -# make -f Makefile.sgi -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are both installed in /usr/local/{include,lib} (as indicated by the -# PNG* and Z* macros below). Edit as appropriate--choose only ONE each of -# the PNGINC, PNGLIB, ZINC and ZLIB lines. -# -# This makefile builds dynamically linked executables (against libpng and zlib, -# that is), but that can be changed by uncommenting the appropriate PNGLIB and -# ZLIB lines. - - -# macros -------------------------------------------------------------------- - -PNGINC = -I/usr/local/include/libpng16 -PNGLIB = -L/usr/local/lib -lpng16 # dynamically linked against libpng -#PNGLIB = /usr/local/lib/libpng16.a # statically linked against libpng -# or: -#PNGINC = -I../.. -#PNGLIB = -L../.. -lpng -#PNGLIB = ../../libpng.a - -ZINC = -I/usr/local/include -ZLIB = -L/usr/local/lib -lz # dynamically linked against zlib -#ZLIB = /usr/local/lib/libz.a # statically linked against zlib -#ZINC = -I../zlib -#ZLIB = -L../zlib -lz -#ZLIB = ../../../zlib/libz.a - -XINC = -I/usr/include/X11 # old-style, stock X distributions -XLIB = -L/usr/lib/X11 -lX11 -#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows) -#XLIB = -L/usr/openwin/lib -lX11 -#XINC = -I/usr/X11R6/include # new X distributions (XFree86, etc.) -#XLIB = -L/usr/X11R6/lib -lX11 - -INCS = $(PNGINC) $(ZINC) $(XINC) -RLIBS = $(PNGLIB) $(ZLIB) $(XLIB) -lm -WLIBS = $(PNGLIB) $(ZLIB) - -CC = cc -LD = cc -RM = rm -f -# ABI must be the same as that used to build libpng. -ABI = -CPPFLAGS = -CFLAGS = $(ABI) -O -fullwarn $(INCS) -LDFLAGS = $(ABI) -O = .o -E = - -RPNG = rpng-x -RPNG2 = rpng2-x -WPNG = wpng - -ROBJS = $(RPNG)$(O) readpng$(O) -ROBJS2 = $(RPNG2)$(O) readpng2$(O) -WOBJS = $(WPNG)$(O) writepng$(O) - -EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNG)$(E): $(ROBJS) - $(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBS) - -$(RPNG2)$(E): $(ROBJS2) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBS) - -$(WPNG)$(E): $(WOBJS) - $(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBS) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O): readpng.c readpng.h -readpng2$(O): readpng2.c readpng2.h -writepng$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: - $(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS) diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.unx b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.unx deleted file mode 100644 index 1a73e03bff4..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.unx +++ /dev/null @@ -1,134 +0,0 @@ -# Sample makefile for rpng-x / rpng2-x / wpng using gcc and make. -# Greg Roelofs -# Last modified: 2 June 2007 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Well, OK, it's not -# generally for sale anymore, but it's the thought that counts, -# right? (Hint: http://www.libpng.org/pub/png/book/ ) -# -# Invoke this makefile from a shell prompt in the usual way; for example: -# -# make -f Makefile.unx -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are installed in /usr/local/{include,lib} or as otherwise indicated by -# the PNG* and Z* macros below. Edit as appropriate--choose only ONE each of -# the PNGINC, PNGLIBd, PNGLIBs, ZINC, ZLIBd and ZLIBs lines. -# -# This makefile builds both dynamically and statically linked executables -# (against libpng and zlib, that is), but that can be changed by modifying -# the "EXES =" line. (You need only one set, but for testing it can be handy -# to have both.) - - -# macros -------------------------------------------------------------------- - -#PNGDIR = /usr/local/lib -#PNGINC = -I/usr/local/include/libpng16 -#PNGLIBd = -L$(PNGDIR) -lpng16 # dynamically linked, installed libpng -#PNGLIBs = $(PNGDIR)/libpng16.a # statically linked, installed libpng -# or: -PNGDIR = ../..# this one is for libpng-x.y.z/contrib/gregbook builds -#PNGDIR = ../libpng -PNGINC = -I$(PNGDIR) -PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng16 # dynamically linked -PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng - -ZDIR = /usr/local/lib -#ZDIR = /usr/lib64 -ZINC = -I/usr/local/include -ZLIBd = -L$(ZDIR) -lz # dynamically linked against zlib -ZLIBs = $(ZDIR)/libz.a # statically linked against zlib -# or: -#ZDIR = ../zlib -#ZINC = -I$(ZDIR) -#ZLIBd = -Wl,-rpath,$(ZDIR) -L$(ZDIR) -lz # -rpath allows in-place testing -#ZLIBs = $(ZDIR)/libz.a - -#XINC = -I/usr/include # old-style, stock X distributions -#XLIB = -L/usr/lib/X11 -lX11 # (including SGI IRIX) -#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows) -#XLIB = -L/usr/openwin/lib -lX11 -XINC = -I/usr/X11R6/include # new X distributions (X.org, etc.) -XLIB = -L/usr/X11R6/lib -lX11 -#XLIB = -L/usr/X11R6/lib64 -lX11 # e.g., Red Hat on AMD64 - -INCS = $(PNGINC) $(ZINC) $(XINC) -RLIBSd = $(PNGLIBd) $(ZLIBd) $(XLIB) -lm -RLIBSs = $(PNGLIBs) $(ZLIBs) $(XLIB) -lm -WLIBSd = $(PNGLIBd) $(ZLIBd) -lm -WLIBSs = $(PNGLIBs) $(ZLIBs) -lm - -CC = gcc -LD = gcc -RM = rm -f -CPPFLAGS = $(INCS) -DFEATURE_LOOP -CFLAGS = -O -Wall -#CFLAGS = -O -W -Wall -Wextra -pedantic -ansi -# [note that -Wall is a gcc-specific compilation flag ("most warnings on")] -# [-ansi, -pedantic, -Wextra, and -W can also be used] -LDFLAGS = -O = .o -E = - -RPNG = rpng-x -RPNG2 = rpng2-x -WPNG = wpng - -RPNGs = $(RPNG)-static -RPNG2s = $(RPNG2)-static -WPNGs = $(WPNG)-static - -ROBJS = $(RPNG)$(O) readpng$(O) -ROBJS2 = $(RPNG2)$(O) readpng2$(O) -WOBJS = $(WPNG)$(O) writepng$(O) - -STATIC_EXES = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E) -DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - -EXES = $(STATIC_EXES) $(DYNAMIC_EXES) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNGs)$(E): $(ROBJS) - $(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSs) - -$(RPNG)$(E): $(ROBJS) - $(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSd) - -$(RPNG2s)$(E): $(ROBJS2) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSs) - -$(RPNG2)$(E): $(ROBJS2) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSd) - -$(WPNGs)$(E): $(WOBJS) - $(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSs) - -$(WPNG)$(E): $(WOBJS) - $(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSd) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O): readpng.c readpng.h -readpng2$(O): readpng2.c readpng2.h -writepng$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: - $(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS) diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.w32 b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.w32 deleted file mode 100644 index ab7dcf7cae7..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/Makefile.w32 +++ /dev/null @@ -1,114 +0,0 @@ -# Sample makefile for rpng-win / rpng2-win / wpng using MSVC and NMAKE. -# Greg Roelofs -# Last modified: 2 June 2007 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Well, OK, it's not -# generally for sale anymore, but it's the thought that counts, -# right? (Hint: http://www.libpng.org/pub/png/book/ ) -# -# Invoke this makefile from a DOS prompt window via: -# -# %devstudio%\vc\bin\vcvars32.bat -# nmake -nologo -f Makefile.w32 -# -# where %devstudio% is the installation directory for MSVC / DevStudio. If -# you get "environment out of space" errors, create a desktop shortcut with -# "c:\windows\command.com /e:4096" as the program command line and set the -# working directory to this directory. Then double-click to open the new -# DOS-prompt window with a bigger environment and retry the commands above. -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are in subdirectories at the same level as the current subdirectory -# (as indicated by the PNGPATH and ZPATH macros below). Edit as appropriate. -# -# Note that the names of the dynamic and static libpng and zlib libraries -# used below may change in later releases of the libraries. This makefile -# builds statically linked executables, but that can be changed by uncom- -# menting the appropriate PNGLIB and ZLIB lines. - -!include <ntwin32.mak> - - -# macros -------------------------------------------------------------------- - -PNGPATH = ../libpng -PNGINC = -I$(PNGPATH) -#PNGLIB = $(PNGPATH)/pngdll.lib -PNGLIB = $(PNGPATH)/libpng.lib - -ZPATH = ../zlib -ZINC = -I$(ZPATH) -#ZLIB = $(ZPATH)/zlibdll.lib -ZLIB = $(ZPATH)/zlibstat.lib - -WINLIBS = -defaultlib:user32.lib gdi32.lib -# ["real" apps may also need comctl32.lib, comdlg32.lib, winmm.lib, etc.] - -INCS = $(PNGINC) $(ZINC) -RLIBS = $(PNGLIB) $(ZLIB) $(WINLIBS) -WLIBS = $(PNGLIB) $(ZLIB) - -CC = cl -LD = link -RM = del -CPPFLAGS = $(INCS) -CFLAGS = -nologo -O -W3 $(cvars) -# [note that -W3 is an MSVC-specific compilation flag ("all warnings on")] -# [see %devstudio%\vc\include\win32.mak for cvars macro definition] -O = .obj -E = .exe - -RLDFLAGS = -nologo -subsystem:windows -WLDFLAGS = -nologo - -RPNG = rpng-win -RPNG2 = rpng2-win -WPNG = wpng - -ROBJS = $(RPNG)$(O) readpng$(O) -ROBJS2 = $(RPNG2)$(O) readpng2$(O) -WOBJS = $(WPNG)$(O) writepng$(O) - -EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNG)$(E): $(ROBJS) - $(LD) $(RLDFLAGS) -out:$@ $(ROBJS) $(RLIBS) - -$(RPNG2)$(E): $(ROBJS2) - $(LD) $(RLDFLAGS) -out:$@ $(ROBJS2) $(RLIBS) - -$(WPNG)$(E): $(WOBJS) - $(LD) $(WLDFLAGS) -out:$@ $(WOBJS) $(WLIBS) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O): readpng.c readpng.h -readpng2$(O): readpng2.c readpng2.h -writepng$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: -# ideally we could just do this: -# $(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS) -# ...but the Windows "DEL" command is none too bright, so: - $(RM) r*$(E) - $(RM) w*$(E) - $(RM) r*$(O) - $(RM) w*$(O) diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/README deleted file mode 100644 index 7b1f6a3ea62..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/README +++ /dev/null @@ -1,186 +0,0 @@ - =========================== - PNG: The Definitive Guide - =========================== - - Source Code - -Chapters 13, 14 and 15 of "PNG: The Definitive Guide" discuss three free, -cross-platform demo programs that show how to use the libpng reference -library: rpng, rpng2 and wpng. rpng and rpng2 are viewers; the first is -a very simple example that that shows how a standard file-viewer might use -libpng, while the second is designed to process streaming data and shows -how a web browser might be written. wpng is a simple command-line program -that reads binary PGM and PPM files (the ``raw'' grayscale and RGB subsets -of PBMPLUS/NetPBM) and converts them to PNG. - -The source code for all three demo programs currently compiles under -Unix, OpenVMS, and 32-bit Windows. (Special thanks to Martin Zinser, -zinser@decus.de, for making the necessary changes for OpenVMS and for -providing an appropriate build script.) Build instructions can be found -below. - -Files: - - README this file - LICENSE terms of distribution and reuse (BSD-like or GNU GPL) - COPYING GNU General Public License (GPL) - - Makefile.unx Unix makefile - Makefile.w32 Windows (MSVC) makefile - makevms.com OpenVMS build script - - rpng-win.c Windows front end for the basic viewer - rpng-x.c X Window System (Unix, OpenVMS) front end - readpng.c generic back end for the basic viewer - readpng.h header file for the basic viewer - - rpng2-win.c Windows front end for the progressive viewer - rpng2-x.c X front end for the progressive viewer - readpng2.c generic back end for the progressive viewer - readpng2.h header file for the progressive viewer - - wpng.c generic (text) front end for the converter - writepng.c generic back end for the converter - writepng.h header file for the converter - - toucan.png transparent PNG for testing (by Stefan Schneider) - -Note that, although the programs are designed to be functional, their -primary purpose is to illustrate how to use libpng to add PNG support to -other programs. As such, their user interfaces are crude and definitely -are not intended for everyday use. - -Please see http://www.libpng.org/pub/png/pngbook.html for further infor- -mation and links to the latest version of the source code, and Chapters -13-15 of the book for detailed discussion of the three programs. - -Greg Roelofs -http://pobox.com/~newt/greg_contact.html -16 March 2008 - - -BUILD INSTRUCTIONS - - - Prerequisites (in order of compilation): - - - zlib http://zlib.net/ - - libpng http://www.libpng.org/pub/png/libpng.html - - pngbook http://www.libpng.org/pub/png/book/sources.html - - The pngbook demo programs are explicitly designed to demonstrate proper - coding techniques for using the libpng reference library. As a result, - you need to download and build both zlib (on which libpng depends) and - libpng. A common build setup is to place the zlib, libpng and pngbook - subdirectory trees ("folders") in the same parent directory. Then the - libpng build can refer to files in ../zlib (or ..\zlib or [-.zlib]), - and similarly for the pngbook build. - - Note that all three packages are designed to be built from a command - line by default; those who wish to use a graphical or other integrated - development environments are on their own. - - - - Unix: - - Unpack the latest pngbook sources (which should correspond to this - README file) into a directory and change into that directory. - - Copy Makefile.unx to Makefile and edit the PNG* and Z* variables - appropriately (possibly also the X* variables if necessary). - - make - - There is no "install" target, so copy the three executables somewhere - in your path or run them from the current directory. All three will - print a basic usage screen when run without any command-line arguments; - see the book for more details. - - - - Windows: - - Unpack the latest pngbook sources (which should correspond to this - README file) into a folder, open a "DOS shell" or "command prompt" - or equivalent command-line window, and cd into the folder where you - unpacked the source code. - - For MSVC, set up the necessary environment variables by invoking - - %devstudio%\vc\bin\vcvars32.bat - - where where %devstudio% is the installation directory for MSVC / - DevStudio. If you get "environment out of space" errors under 95/98, - create a desktop shortcut with "c:\windows\command.com /e:4096" as - the program command line and set the working directory to the pngbook - directory. Then double-click to open the new DOS-prompt window with - a bigger environment and retry the commands above. - - Copy Makefile.w32 to Makefile and edit the PNGPATH and ZPATH variables - appropriately (possibly also the "INC" and "LIB" variables if needed). - Note that the names of the dynamic and static libpng and zlib libraries - used in the makefile may change in later releases of the libraries. - Also note that, as of libpng version 1.0.5, MSVC DLL builds do not work. - This makefile therefore builds statically linked executables, but if - the DLL problems ever get fixed, uncommenting the appropriate PNGLIB - and ZLIB lines will build dynamically linked executables instead. - - Do the build by typing - - nmake - - The result should be three executables: rpng-win.exe, rpng2-win.exe, - and wpng.exe. Copy them somewhere in your PATH or run them from the - current folder. Like the Unix versions, the two windowed programs - (rpng and rpng2) now display a usage screen in a console window when - invoked without command-line arguments; this is new behavior as of - the June 2001 release. Note that the programs use the Unix-style "-" - character to specify options, instead of the more common DOS/Windows - "/" character. (For example: "rpng2-win -bgpat 4 foo.png", not - "rpng2-win /bgpat 4 foo.png") - - - - OpenVMS: - - Unpack the pngbook sources into a subdirectory and change into that - subdirectory. - - Edit makevms.com appropriately, specifically the zpath and pngpath - variables. - - @makevms - - To run the programs, they probably first need to be set up as "foreign - symbols," with "disk" and "dir" set appropriately: - - $ rpng == "$disk:[dir]rpng-x.exe" - $ rpng2 == "$disk:[dir]rpng2-x.exe" - $ wpng == "$disk:[dir]wpng.exe" - - All three will print a basic usage screen when run without any command- - line arguments; see the book for more details. Note that the options - style is Unix-like, i.e., preceded by "-" rather than "/". - - -RUNNING THE PROGRAMS: (VERY) BRIEF INTRO - - rpng is a simple PNG viewer that can display transparent PNGs with a - specified background color; for example, - - rpng -bgcolor \#ff0000 toucan.png - - would display the image with a red background. rpng2 is a progressive - viewer that simulates a web browser in some respects; it can display - images against either a background color or a dynamically generated - background image. For example: - - rpng2 -bgpat 16 toucan.png - - wpng is a purely command-line image converter from binary PBMPLUS/NetPBM - format (.pgm or .ppm) to PNG; for example, - - wpng -time < toucan-notrans.ppm > toucan-notrans.png - - would convert the specified PPM file (using redirection) to PNG, auto- - matically setting the PNG modification-time chunk. - - All options can be abbreviated to the shortest unique value; for example, - "-bgc" for -bgcolor (versus "-bgp" for -bgpat), or "-g" for -gamma. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/makevms.com b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/makevms.com deleted file mode 100644 index f32bcaba7f9..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/makevms.com +++ /dev/null @@ -1,132 +0,0 @@ -$!------------------------------------------------------------------------------ -$! make "PNG: The Definitive Guide" demo programs (for X) under OpenVMS -$! -$! Script created by Martin Zinser for libpng; modified by Greg Roelofs -$! for standalone pngbook source distribution. -$! -$! -$! Set locations where zlib and libpng sources live. -$! -$ zpath = "" -$ pngpath = "" -$! -$ if f$search("[---.zlib]zlib.h").nes."" then zpath = "[---.zlib]" -$ if f$search("[--]png.h").nes."" then pngpath = "[--]" -$! -$ if f$search("[-.zlib]zlib.h").nes."" then zpath = "[-.zlib]" -$ if f$search("[-.libpng]png.h").nes."" then pngpath = "[-.libpng]" -$! -$ if zpath .eqs. "" -$ then -$ write sys$output "zlib include not found. Exiting..." -$ exit 2 -$ endif -$! -$ if pngpath .eqs. "" -$ then -$ write sys$output "libpng include not found. Exiting..." -$ exit 2 -$ endif -$! -$! Look for the compiler used. -$! -$ ccopt="/include=(''zpath',''pngpath')" -$ if f$getsyi("HW_MODEL").ge.1024 -$ then -$ ccopt = "/prefix=all"+ccopt -$ comp = "__decc__=1" -$ if f$trnlnm("SYS").eqs."" then define sys sys$library: -$ else -$ if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs."" -$ then -$ if f$trnlnm("SYS").eqs."" then define sys sys$library: -$ if f$search("SYS$SYSTEM:VAXC.EXE").eqs."" -$ then -$ comp = "__gcc__=1" -$ CC :== GCC -$ else -$ comp = "__vaxc__=1" -$ endif -$ else -$ if f$trnlnm("SYS").eqs."" then define sys decc$library_include: -$ ccopt = "/decc/prefix=all"+ccopt -$ comp = "__decc__=1" -$ endif -$ endif -$ open/write lopt lib.opt -$ write lopt "''pngpath'libpng.olb/lib" -$ write lopt "''zpath'libz.olb/lib" -$ close lopt -$ open/write xopt x11.opt -$ write xopt "sys$library:decw$xlibshr.exe/share" -$ close xopt -$! -$! Build 'em. -$! -$ write sys$output "Compiling PNG book programs ..." -$ CALL MAKE readpng.OBJ "cc ''CCOPT' readpng" - - readpng.c readpng.h -$ CALL MAKE readpng2.OBJ "cc ''CCOPT' readpng2" - - readpng2.c readpng2.h -$ CALL MAKE writepng.OBJ "cc ''CCOPT' writepng" - - writepng.c writepng.h -$ write sys$output "Building rpng-x..." -$ CALL MAKE rpng-x.OBJ "cc ''CCOPT' rpng-x" - - rpng-x.c readpng.h -$ call make rpng-x.exe - - "LINK rpng-x,readpng,lib.opt/opt,x11.opt/opt" - - rpng-x.obj readpng.obj -$ write sys$output "Building rpng2-x..." -$ CALL MAKE rpng2-x.OBJ "cc ''CCOPT' rpng2-x" - - rpng2-x.c readpng2.h -$ call make rpng2-x.exe - - "LINK rpng2-x,readpng2,lib.opt/opt,x11.opt/opt" - - rpng2-x.obj readpng2.obj -$ write sys$output "Building wpng..." -$ CALL MAKE wpng.OBJ "cc ''CCOPT' wpng" - - wpng.c writepng.h -$ call make wpng.exe - - "LINK wpng,writepng,lib.opt/opt" - - wpng.obj writepng.obj -$ exit -$! -$! -$MAKE: SUBROUTINE !SUBROUTINE TO CHECK DEPENDENCIES -$ V = 'F$Verify(0) -$! P1 = What we are trying to make -$! P2 = Command to make it -$! P3 - P8 What it depends on -$ -$ If F$Search(P1) .Eqs. "" Then Goto Makeit -$ Time = F$CvTime(F$File(P1,"RDT")) -$arg=3 -$Loop: -$ Argument = P'arg -$ If Argument .Eqs. "" Then Goto Exit -$ El=0 -$Loop2: -$ File = F$Element(El," ",Argument) -$ If File .Eqs. " " Then Goto Endl -$ AFile = "" -$Loop3: -$ OFile = AFile -$ AFile = F$Search(File) -$ If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl -$ If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit -$ Goto Loop3 -$NextEL: -$ El = El + 1 -$ Goto Loop2 -$EndL: -$ arg=arg+1 -$ If arg .Le. 8 Then Goto Loop -$ Goto Exit -$ -$Makeit: -$ VV=F$VERIFY(0) -$ write sys$output P2 -$ 'P2 -$ VV='F$Verify(VV) -$Exit: -$ If V Then Set Verify -$ENDSUBROUTINE diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng.c deleted file mode 100644 index 9167403e597..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng.c +++ /dev/null @@ -1,317 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program readpng.c - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#include <stdio.h> -#include <stdlib.h> -#include <zlib.h> - -#include "png.h" /* libpng header */ -#include "readpng.h" /* typedefs, common macros, public prototypes */ - -/* future versions of libpng will provide this macro: */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - - -static png_structp png_ptr = NULL; -static png_infop info_ptr = NULL; - -png_uint_32 width, height; -int bit_depth, color_type; -uch *image_data = NULL; - - -void readpng_version_info(void) -{ - fprintf(stderr, " Compiled with libpng %s; using libpng %s.\n", - PNG_LIBPNG_VER_STRING, png_libpng_ver); - fprintf(stderr, " Compiled with zlib %s; using zlib %s.\n", - ZLIB_VERSION, zlib_version); -} - - -/* return value = 0 for success, 1 for bad sig, 2 for bad IHDR, 4 for no mem */ - -int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight) -{ - uch sig[8]; - - - /* first do a quick check that the file really is a PNG image; could - * have used slightly more general png_sig_cmp() function instead */ - - fread(sig, 1, 8, infile); - if (png_sig_cmp(sig, 0, 8)) - return 1; /* bad signature */ - - - /* could pass pointers to user-defined error handlers instead of NULLs: */ - - png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), NULL, NULL, - NULL); - if (!png_ptr) - return 4; /* out of memory */ - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) { - png_destroy_read_struct(&png_ptr, NULL, NULL); - return 4; /* out of memory */ - } - - - /* we could create a second info struct here (end_info), but it's only - * useful if we want to keep pre- and post-IDAT chunk info separated - * (mainly for PNG-aware image editors and converters) */ - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 2; - } - - - png_init_io(png_ptr, infile); - png_set_sig_bytes(png_ptr, 8); /* we already read the 8 signature bytes */ - - png_read_info(png_ptr, info_ptr); /* read all PNG info up to image data */ - - - /* alternatively, could make separate calls to png_get_image_width(), - * etc., but want bit_depth and color_type for later [don't care about - * compression_type and filter_type => NULLs] */ - - png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - *pWidth = width; - *pHeight = height; - - - /* OK, that's all we need for now; return happy */ - - return 0; -} - - - - -/* returns 0 if succeeds, 1 if fails due to no bKGD chunk, 2 if libpng error; - * scales values to 8-bit if necessary */ - -int readpng_get_bgcolor(uch *red, uch *green, uch *blue) -{ - png_color_16p pBackground; - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 2; - } - - - if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_bKGD)) - return 1; - - /* it is not obvious from the libpng documentation, but this function - * takes a pointer to a pointer, and it always returns valid red, green - * and blue values, regardless of color_type: */ - - png_get_bKGD(png_ptr, info_ptr, &pBackground); - - - /* however, it always returns the raw bKGD data, regardless of any - * bit-depth transformations, so check depth and adjust if necessary */ - - if (bit_depth == 16) { - *red = pBackground->red >> 8; - *green = pBackground->green >> 8; - *blue = pBackground->blue >> 8; - } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) { - if (bit_depth == 1) - *red = *green = *blue = pBackground->gray? 255 : 0; - else if (bit_depth == 2) - *red = *green = *blue = (255/3) * pBackground->gray; - else /* bit_depth == 4 */ - *red = *green = *blue = (255/15) * pBackground->gray; - } else { - *red = (uch)pBackground->red; - *green = (uch)pBackground->green; - *blue = (uch)pBackground->blue; - } - - return 0; -} - - - - -/* display_exponent == LUT_exponent * CRT_exponent */ - -uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes) -{ - double gamma; - png_uint_32 i, rowbytes; - png_bytepp row_pointers = NULL; - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(png_jmpbuf(png_ptr))) { - free(image_data); - image_data = NULL; - free(row_pointers); - row_pointers = NULL; - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return NULL; - } - - - /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits, - * transparency chunks to full alpha channel; strip 16-bit-per-sample - * images to 8 bits per sample; and convert grayscale to RGB[A] */ - - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_expand(png_ptr); - if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - png_set_expand(png_ptr); - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand(png_ptr); -#ifdef PNG_READ_16_TO_8_SUPPORTED - if (bit_depth == 16) -# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(png_ptr); -# else - png_set_strip_16(png_ptr); -# endif -#endif - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); - - - /* unlike the example in the libpng documentation, we have *no* idea where - * this file may have come from--so if it doesn't have a file gamma, don't - * do any correction ("do no harm") */ - - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, display_exponent, gamma); - - - /* all transformations have been registered; now update info_ptr data, - * get rowbytes and channels, and allocate image memory */ - - png_read_update_info(png_ptr, info_ptr); - - *pRowbytes = rowbytes = png_get_rowbytes(png_ptr, info_ptr); - *pChannels = (int)png_get_channels(png_ptr, info_ptr); - - if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return NULL; - } - if ((row_pointers = (png_bytepp)malloc(height*sizeof(png_bytep))) == NULL) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - free(image_data); - image_data = NULL; - return NULL; - } - - Trace((stderr, "readpng_get_image: channels = %d, rowbytes = %ld, height = %ld\n", - *pChannels, rowbytes, height)); - - - /* set the individual row_pointers to point at the correct offsets */ - - for (i = 0; i < height; ++i) - row_pointers[i] = image_data + i*rowbytes; - - - /* now we can go ahead and just read the whole image */ - - png_read_image(png_ptr, row_pointers); - - - /* and we're done! (png_read_end() can be omitted if no processing of - * post-IDAT text/time/etc. is desired) */ - - free(row_pointers); - row_pointers = NULL; - - png_read_end(png_ptr, NULL); - - return image_data; -} - - -void readpng_cleanup(int free_image_data) -{ - if (free_image_data && image_data) { - free(image_data); - image_data = NULL; - } - - if (png_ptr && info_ptr) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - png_ptr = NULL; - info_ptr = NULL; - } -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng.h deleted file mode 100644 index fad9fe3b4c5..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng.h +++ /dev/null @@ -1,88 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program readpng.h - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#ifndef TRUE -# define TRUE 1 -# define FALSE 0 -#endif - -#ifndef MAX -# define MAX(a,b) ((a) > (b)? (a) : (b)) -# define MIN(a,b) ((a) < (b)? (a) : (b)) -#endif - -#ifdef DEBUG -# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} -#else -# define Trace(x) ; -#endif - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - - -/* prototypes for public functions in readpng.c */ - -void readpng_version_info(void); - -int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight); - -int readpng_get_bgcolor(uch *bg_red, uch *bg_green, uch *bg_blue); - -uch *readpng_get_image(double display_exponent, int *pChannels, - ulg *pRowbytes); - -void readpng_cleanup(int free_image_data); diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng2.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng2.c deleted file mode 100644 index 4cf2600a41d..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng2.c +++ /dev/null @@ -1,513 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program readpng2.c - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - - -#include <stdlib.h> /* for exit() prototype */ -#include <setjmp.h> - -#include <zlib.h> -#include "png.h" /* libpng header from the local directory */ -#include "readpng2.h" /* typedefs, common macros, public prototypes */ - - -/* local prototypes */ - -static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr); -static void readpng2_row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass); -static void readpng2_end_callback(png_structp png_ptr, png_infop info_ptr); -static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg); -static void readpng2_warning_handler(png_structp png_ptr, png_const_charp msg); - - - - -void readpng2_version_info(void) -{ - fprintf(stderr, " Compiled with libpng %s; using libpng %s\n", - PNG_LIBPNG_VER_STRING, png_libpng_ver); - - fprintf(stderr, " and with zlib %s; using zlib %s.\n", - ZLIB_VERSION, zlib_version); -} - - - - -int readpng2_check_sig(uch *sig, int num) -{ - return !png_sig_cmp(sig, 0, num); -} - - - - -/* returns 0 for success, 2 for libpng problem, 4 for out of memory */ - -int readpng2_init(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr; /* note: temporary variables! */ - png_infop info_ptr; - - - /* could also replace libpng warning-handler (final NULL), but no need: */ - - png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), mainprog_ptr, - readpng2_error_handler, readpng2_warning_handler); - if (!png_ptr) - return 4; /* out of memory */ - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) { - png_destroy_read_struct(&png_ptr, NULL, NULL); - return 4; /* out of memory */ - } - - - /* we could create a second info struct here (end_info), but it's only - * useful if we want to keep pre- and post-IDAT chunk info separated - * (mainly for PNG-aware image editors and converters) */ - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function, unless an alternate error handler was installed-- - * but compatible error handlers must either use longjmp() themselves - * (as in this program) or exit immediately, so here we are: */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 2; - } - - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - /* prepare the reader to ignore all recognized chunks whose data won't be - * used, i.e., all chunks recognized by libpng except for IHDR, PLTE, IDAT, - * IEND, tRNS, bKGD, gAMA, and sRGB (small performance improvement) */ - { - /* These byte strings were copied from png.h. If a future version - * of readpng2.c recognizes more chunks, add them to this list. - */ - static PNG_CONST png_byte chunks_to_process[] = { - 98, 75, 71, 68, '\0', /* bKGD */ - 103, 65, 77, 65, '\0', /* gAMA */ - 115, 82, 71, 66, '\0', /* sRGB */ - }; - - /* Ignore all chunks except for IHDR, PLTE, tRNS, IDAT, and IEND */ - png_set_keep_unknown_chunks(png_ptr, -1 /* PNG_HANDLE_CHUNK_NEVER */, - NULL, -1); - - /* But do not ignore chunks in the "chunks_to_process" list */ - png_set_keep_unknown_chunks(png_ptr, - 0 /* PNG_HANDLE_CHUNK_AS_DEFAULT */, chunks_to_process, - sizeof(chunks_to_process)/5); - } -#endif /* PNG_HANDLE_AS_UNKNOWN_SUPPORTED */ - - - /* instead of doing png_init_io() here, now we set up our callback - * functions for progressive decoding */ - - png_set_progressive_read_fn(png_ptr, mainprog_ptr, - readpng2_info_callback, readpng2_row_callback, readpng2_end_callback); - - - /* make sure we save our pointers for use in readpng2_decode_data() */ - - mainprog_ptr->png_ptr = png_ptr; - mainprog_ptr->info_ptr = info_ptr; - - - /* and that's all there is to initialization */ - - return 0; -} - - - - -/* returns 0 for success, 2 for libpng (longjmp) problem */ - -int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* hand off the next chunk of input data to libpng for decoding */ - - png_process_data(png_ptr, info_ptr, rawbuf, length); - - return 0; -} - - - - -static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr) -{ - mainprog_info *mainprog_ptr; - int color_type, bit_depth; - png_uint_32 width, height; -#ifdef PNG_FLOATING_POINT_SUPPORTED - double gamma; -#else - png_fixed_point gamma; -#endif - - - /* setjmp() doesn't make sense here, because we'd either have to exit(), - * longjmp() ourselves, or return control to libpng, which doesn't want - * to see us again. By not doing anything here, libpng will instead jump - * to readpng2_decode_data(), which can return an error value to the main - * program. */ - - - /* retrieve the pointer to our special-purpose struct, using the png_ptr - * that libpng passed back to us (i.e., not a global this time--there's - * no real difference for a single image, but for a multithreaded browser - * decoding several PNG images at the same time, one needs to avoid mixing - * up different images' structs) */ - - mainprog_ptr = png_get_progressive_ptr(png_ptr); - - if (mainprog_ptr == NULL) { /* we be hosed */ - fprintf(stderr, - "readpng2 error: main struct not recoverable in info_callback.\n"); - fflush(stderr); - return; - /* - * Alternatively, we could call our error-handler just like libpng - * does, which would effectively terminate the program. Since this - * can only happen if png_ptr gets redirected somewhere odd or the - * main PNG struct gets wiped, we're probably toast anyway. (If - * png_ptr itself is NULL, we would not have been called.) - */ - } - - - /* this is just like in the non-progressive case */ - - png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - mainprog_ptr->width = (ulg)width; - mainprog_ptr->height = (ulg)height; - - - /* since we know we've read all of the PNG file's "header" (i.e., up - * to IDAT), we can check for a background color here */ - - if (mainprog_ptr->need_bgcolor && - png_get_valid(png_ptr, info_ptr, PNG_INFO_bKGD)) - { - png_color_16p pBackground; - - /* it is not obvious from the libpng documentation, but this function - * takes a pointer to a pointer, and it always returns valid red, - * green and blue values, regardless of color_type: */ - png_get_bKGD(png_ptr, info_ptr, &pBackground); - - /* however, it always returns the raw bKGD data, regardless of any - * bit-depth transformations, so check depth and adjust if necessary */ - if (bit_depth == 16) { - mainprog_ptr->bg_red = pBackground->red >> 8; - mainprog_ptr->bg_green = pBackground->green >> 8; - mainprog_ptr->bg_blue = pBackground->blue >> 8; - } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) { - if (bit_depth == 1) - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = pBackground->gray? 255 : 0; - else if (bit_depth == 2) - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = (255/3) * pBackground->gray; - else /* bit_depth == 4 */ - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = (255/15) * pBackground->gray; - } else { - mainprog_ptr->bg_red = (uch)pBackground->red; - mainprog_ptr->bg_green = (uch)pBackground->green; - mainprog_ptr->bg_blue = (uch)pBackground->blue; - } - } - - - /* as before, let libpng expand palette images to RGB, low-bit-depth - * grayscale images to 8 bits, transparency chunks to full alpha channel; - * strip 16-bit-per-sample images to 8 bits per sample; and convert - * grayscale to RGB[A] */ - - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_expand(png_ptr); - if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - png_set_expand(png_ptr); - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand(png_ptr); -#ifdef PNG_READ_16_TO_8_SUPPORTED - if (bit_depth == 16) -# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(png_ptr); -# else - png_set_strip_16(png_ptr); -# endif -#endif - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); - - - /* Unlike the basic viewer, which was designed to operate on local files, - * this program is intended to simulate a web browser--even though we - * actually read from a local file, too. But because we are pretending - * that most of the images originate on the Internet, we follow the recom- - * mendation of the sRGB proposal and treat unlabelled images (no gAMA - * chunk) as existing in the sRGB color space. That is, we assume that - * such images have a file gamma of 0.45455, which corresponds to a PC-like - * display system. This change in assumptions will have no effect on a - * PC-like system, but on a Mac, SGI, NeXT or other system with a non- - * identity lookup table, it will darken unlabelled images, which effec- - * tively favors images from PC-like systems over those originating on - * the local platform. Note that mainprog_ptr->display_exponent is the - * "gamma" value for the entire display system, i.e., the product of - * LUT_exponent and CRT_exponent. */ - -#ifdef PNG_FLOATING_POINT_SUPPORTED - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, mainprog_ptr->display_exponent, gamma); - else - png_set_gamma(png_ptr, mainprog_ptr->display_exponent, 0.45455); -#else - if (png_get_gAMA_fixed(png_ptr, info_ptr, &gamma)) - png_set_gamma_fixed(png_ptr, - (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), gamma); - else - png_set_gamma_fixed(png_ptr, - (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), 45455); -#endif - - /* we'll let libpng expand interlaced images, too */ - - mainprog_ptr->passes = png_set_interlace_handling(png_ptr); - - - /* all transformations have been registered; now update info_ptr data and - * then get rowbytes and channels */ - - png_read_update_info(png_ptr, info_ptr); - - mainprog_ptr->rowbytes = (int)png_get_rowbytes(png_ptr, info_ptr); - mainprog_ptr->channels = png_get_channels(png_ptr, info_ptr); - - - /* Call the main program to allocate memory for the image buffer and - * initialize windows and whatnot. (The old-style function-pointer - * invocation is used for compatibility with a few supposedly ANSI - * compilers that nevertheless barf on "fn_ptr()"-style syntax.) */ - - (*mainprog_ptr->mainprog_init)(); - - - /* and that takes care of initialization */ - - return; -} - - - - - -static void readpng2_row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass) -{ - mainprog_info *mainprog_ptr; - - - /* first check whether the row differs from the previous pass; if not, - * nothing to combine or display */ - - if (!new_row) - return; - - - /* retrieve the pointer to our special-purpose struct so we can access - * the old rows and image-display callback function */ - - mainprog_ptr = png_get_progressive_ptr(png_ptr); - - - /* save the pass number for optional use by the front end */ - - mainprog_ptr->pass = pass; - - - /* have libpng either combine the new row data with the existing row data - * from previous passes (if interlaced) or else just copy the new row - * into the main program's image buffer */ - - png_progressive_combine_row(png_ptr, mainprog_ptr->row_pointers[row_num], - new_row); - - - /* finally, call the display routine in the main program with the number - * of the row we just updated */ - - (*mainprog_ptr->mainprog_display_row)(row_num); - - - /* and we're ready for more */ - - return; -} - - - - - -static void readpng2_end_callback(png_structp png_ptr, png_infop info_ptr) -{ - mainprog_info *mainprog_ptr; - - - /* retrieve the pointer to our special-purpose struct */ - - mainprog_ptr = png_get_progressive_ptr(png_ptr); - - - /* let the main program know that it should flush any buffered image - * data to the display now and set a "done" flag or whatever, but note - * that it SHOULD NOT DESTROY THE PNG STRUCTS YET--in other words, do - * NOT call readpng2_cleanup() either here or in the finish_display() - * routine; wait until control returns to the main program via - * readpng2_decode_data() */ - - (*mainprog_ptr->mainprog_finish_display)(); - - - /* all done */ - - (void)info_ptr; /* Unused */ - - return; -} - - - - - -void readpng2_cleanup(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - if (png_ptr && info_ptr) - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; -} - - -static void readpng2_warning_handler(png_structp png_ptr, png_const_charp msg) -{ - fprintf(stderr, "readpng2 libpng warning: %s\n", msg); - fflush(stderr); - (void)png_ptr; /* Unused */ -} - - -static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg) -{ - mainprog_info *mainprog_ptr; - - /* This function, aside from the extra step of retrieving the "error - * pointer" (below) and the fact that it exists within the application - * rather than within libpng, is essentially identical to libpng's - * default error handler. The second point is critical: since both - * setjmp() and longjmp() are called from the same code, they are - * guaranteed to have compatible notions of how big a jmp_buf is, - * regardless of whether _BSD_SOURCE or anything else has (or has not) - * been defined. */ - - fprintf(stderr, "readpng2 libpng error: %s\n", msg); - fflush(stderr); - - mainprog_ptr = png_get_error_ptr(png_ptr); - if (mainprog_ptr == NULL) { /* we are completely hosed now */ - fprintf(stderr, - "readpng2 severe error: jmpbuf not recoverable; terminating.\n"); - fflush(stderr); - exit(99); - } - - /* Now we have our data structure we can use the information in it - * to return control to our own higher level code (all the points - * where 'setjmp' is called in this file.) This will work with other - * error handling mechanisms as well - libpng always calls png_error - * when it can proceed no further, thus, so long as the error handler - * is intercepted, application code can do its own error recovery. - */ - longjmp(mainprog_ptr->jmpbuf, 1); -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng2.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng2.h deleted file mode 100644 index 6b3660d7c17..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readpng2.h +++ /dev/null @@ -1,116 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program readpng2.h - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#ifndef TRUE -# define TRUE 1 -# define FALSE 0 -#endif - -#ifndef MAX -# define MAX(a,b) ((a) > (b)? (a) : (b)) -# define MIN(a,b) ((a) < (b)? (a) : (b)) -#endif - -#ifdef DEBUG -# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} -#else -# define Trace(x) ; -#endif - -enum rpng2_states { - kPreInit = 0, - kWindowInit, - kDone -}; - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - -typedef struct _mainprog_info { - double display_exponent; - ulg width; - ulg height; - void *png_ptr; - void *info_ptr; - void (*mainprog_init)(void); - void (*mainprog_display_row)(ulg row_num); - void (*mainprog_finish_display)(void); - uch *image_data; - uch **row_pointers; - jmp_buf jmpbuf; - int passes; /* not used */ - int pass; - int rowbytes; - int channels; - int need_bgcolor; - int state; - uch bg_red; - uch bg_green; - uch bg_blue; -} mainprog_info; - - -/* prototypes for public functions in readpng2.c */ - -void readpng2_version_info(void); - -int readpng2_check_sig(uch *sig, int num); - -int readpng2_init(mainprog_info *mainprog_ptr); - -int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length); - -void readpng2_cleanup(mainprog_info *mainprog_ptr); diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readppm.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readppm.c deleted file mode 100644 index 7fefc3943ec..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/readppm.c +++ /dev/null @@ -1,183 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program readppm.c - - --------------------------------------------------------------------------- - - This is a special-purpose replacement for readpng.c that allows binary - PPM files to be used in place of PNG images. - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#include <stdio.h> -#include <stdlib.h> - -#include "readpng.h" /* typedefs, common macros, public prototypes */ - - -ulg width, height; -int bit_depth, color_type, channels; -uch *image_data = NULL; -FILE *saved_infile; - - -void readpng_version_info() -{ - fprintf(stderr, " Compiled without libpng, zlib or PBMPLUS/NetPBM.\n"); -} - - -/* return value = 0 for success, 1 for bad sig, 2 for bad IHDR, 4 for no mem */ - -int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight) -{ - static uch ppmline[256]; - int maxval; - - - saved_infile = infile; - - fgets(ppmline, 256, infile); - if (ppmline[0] != 'P' || ppmline[1] != '6') { - fprintf(stderr, "ERROR: not a PPM file\n"); - return 1; - } - /* possible color types: P5 = grayscale (0), P6 = RGB (2), P8 = RGBA (6) */ - if (ppmline[1] == '6') { - color_type = 2; - channels = 3; - } else if (ppmline[1] == '8') { - color_type = 6; - channels = 4; - } else /* if (ppmline[1] == '5') */ { - color_type = 0; - channels = 1; - } - - do { - fgets(ppmline, 256, infile); - } while (ppmline[0] == '#'); - sscanf(ppmline, "%lu %lu", &width, &height); - - do { - fgets(ppmline, 256, infile); - } while (ppmline[0] == '#'); - sscanf(ppmline, "%d", &maxval); - if (maxval != 255) { - fprintf(stderr, "ERROR: maxval = %d\n", maxval); - return 2; - } - bit_depth = 8; - - *pWidth = width; - *pHeight = height; - - return 0; -} - - - - -/* returns 0 if succeeds, 1 if fails due to no bKGD chunk, 2 if libpng error; - * scales values to 8-bit if necessary */ - -int readpng_get_bgcolor(uch *red, uch *green, uch *blue) -{ - return 1; -} - - - - -/* display_exponent == LUT_exponent * CRT_exponent */ - -uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes) -{ - ulg rowbytes; - - - /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits, - * transparency chunks to full alpha channel; strip 16-bit-per-sample - * images to 8 bits per sample; and convert grayscale to RGB[A] */ - - /* GRR WARNING: grayscale needs to be expanded and channels reset! */ - - *pRowbytes = rowbytes = channels*width; - *pChannels = channels; - - if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) { - return NULL; - } - - Trace((stderr, "readpng_get_image: rowbytes = %ld, height = %ld\n", rowbytes, height)); - - - /* now we can go ahead and just read the whole image */ - - if (fread(image_data, 1L, rowbytes*height, saved_infile) < - rowbytes*height) { - free (image_data); - image_data = NULL; - return NULL; - } - - return image_data; -} - - -void readpng_cleanup(int free_image_data) -{ - if (free_image_data && image_data) { - free(image_data); - image_data = NULL; - } -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng-win.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng-win.c deleted file mode 100644 index f53ddc8ece6..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng-win.c +++ /dev/null @@ -1,728 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program rpng-win.c - - This program decodes and displays PNG images, with gamma correction and - optionally with a user-specified background color (in case the image has - transparency). It is very nearly the most basic PNG viewer possible. - This version is for 32-bit Windows; it may compile under 16-bit Windows - with a little tweaking (or maybe not). - - to do: - - handle quoted command-line args (especially filenames with spaces) - - have minimum window width: oh well - - use %.1023s to simplify truncation of title-bar string? - - --------------------------------------------------------------------------- - - Changelog: - - 1.00: initial public release - - 1.01: modified to allow abbreviated options; fixed long/ulong mis- - match; switched to png_jmpbuf() macro - - 1.02: added extra set of parentheses to png_jmpbuf() macro; fixed - command-line parsing bug - - 1.10: enabled "message window"/console (thanks to David Geldreich) - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed improper display of usage screen on PNG error(s) - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng-win" -#define LONGNAME "Simple PNG Viewer for Windows" -#define VERSION "2.01 of 16 March 2008" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <windows.h> -#ifdef __CYGWIN__ -/* getch replacement. Turns out, we don't really need this, - * but leave it here if we ever enable any of the uses of - * _getch in the main code - */ -#include <unistd.h> -#include <termio.h> -#include <sys/ioctl.h> -int repl_getch( void ) -{ - char ch; - int fd = fileno(stdin); - struct termio old_tty, new_tty; - - ioctl(fd, TCGETA, &old_tty); - new_tty = old_tty; - new_tty.c_lflag &= ~(ICANON | ECHO | ISIG); - ioctl(fd, TCSETA, &new_tty); - fread(&ch, 1, sizeof(ch), stdin); - ioctl(fd, TCSETA, &old_tty); - - return ch; -} -#define _getch repl_getch -#else -#include <conio.h> /* only for _getch() */ -#endif - -/* #define DEBUG : this enables the Trace() macros */ - -#include "readpng.h" /* typedefs, common macros, readpng prototypes */ - - -/* could just include png.h, but this macro is the only thing we need - * (name and typedefs changed to local versions); note that side effects - * only happen with alpha (which could easily be avoided with - * "ush acopy = (alpha);") */ - -#define alpha_composite(composite, fg, alpha, bg) { \ - ush temp = ((ush)(fg)*(ush)(alpha) + \ - (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \ - (composite) = (uch)((temp + (temp >> 8)) >> 8); \ -} - - -/* local prototypes */ -static int rpng_win_create_window(HINSTANCE hInst, int showmode); -static int rpng_win_display_image(void); -static void rpng_win_cleanup(void); -LRESULT CALLBACK rpng_win_wndproc(HWND, UINT, WPARAM, LPARAM); - - -static char titlebar[1024]; -static char *progname = PROGNAME; -static char *appname = LONGNAME; -static char *filename; -static FILE *infile; - -static char *bgstr; -static uch bg_red=0, bg_green=0, bg_blue=0; - -static double display_exponent; - -static ulg image_width, image_height, image_rowbytes; -static int image_channels; -static uch *image_data; - -/* Windows-specific variables */ -static ulg wimage_rowbytes; -static uch *dib; -static uch *wimage_data; -static BITMAPINFOHEADER *bmih; - -static HWND global_hwnd; - - - - -int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode) -{ - char *args[1024]; /* arbitrary limit, but should suffice */ - char *p, *q, **argv = args; - int argc = 0; - int rc, alen, flen; - int error = 0; - int have_bg = FALSE; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - MSG msg; - - - filename = (char *)NULL; - -#ifndef __CYGWIN__ - /* First reenable console output, which normally goes to the bit bucket - * for windowed apps. Closing the console window will terminate the - * app. Thanks to David.Geldreich@realviz.com for supplying the magical - * incantation. */ - - AllocConsole(); - freopen("CONOUT$", "a", stderr); - freopen("CONOUT$", "a", stdout); -#endif - - - /* Next set the default value for our display-system exponent, i.e., - * the product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. And - * yes, these ifdefs are completely wasted in a Windows program... */ - -#if defined(NeXT) - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to get the - * "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - display_exponent = atof(p); - else - display_exponent = default_display_exponent; - - - /* Windows really hates command lines, so we have to set up our own argv. - * Note that we do NOT bother with quoted arguments here, so don't use - * filenames with spaces in 'em! */ - - argv[argc++] = PROGNAME; - p = cmd; - for (;;) { - if (*p == ' ') - while (*++p == ' ') - ; - /* now p points at the first non-space after some spaces */ - if (*p == '\0') - break; /* nothing after the spaces: done */ - argv[argc++] = q = p; - while (*q && *q != ' ') - ++q; - /* now q points at a space or the end of the string */ - if (*q == '\0') - break; /* last argv already terminated; quit */ - *q = '\0'; /* change space to terminator */ - p = q + 1; - } - argv[argc] = NULL; /* terminate the argv array itself */ - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - display_exponent = atof(*argv); - if (display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 2)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else - have_bg = TRUE; - } - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); - readpng_version_info(); - fprintf(stderr, "\n" - "Usage: %s [-gamma exp] [-bgcolor bg] file.png\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" - "\t\t to the product of the lookup-table exponent (varies)\n" - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images\n" - "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n" -#ifndef __CYGWIN__ - "Press Q or Esc to quit this usage screen.\n" -#endif - "\n", PROGNAME, default_display_exponent); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(1); - } - - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - if ((rc = readpng_init(infile, &image_width, &image_height)) != 0) { - switch (rc) { - case 1: - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - break; - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng_init() error\n"); - break; - } - ++error; - } - if (error) - fclose(infile); - } - - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, PROGNAME ": aborting.\n"); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(2); - } else { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname); -#ifndef __CYGWIN__ - fprintf(stderr, - "\n [console window: closing this window will terminate %s]\n\n", - PROGNAME); -#endif - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* if the user didn't specify a background color on the command line, - * check for one in the PNG file--if not, the initialized values of 0 - * (black) will be used */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - bg_red = (uch)r; - bg_green = (uch)g; - bg_blue = (uch)b; - } else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) { - readpng_cleanup(TRUE); - fprintf(stderr, PROGNAME - ": libpng error while checking for background color\n"); - exit(2); - } - - - /* do the basic Windows initialization stuff, make the window and fill it - * with the background color */ - - if (rpng_win_create_window(hInst, showmode)) - exit(2); - - - /* decode the image, all at once */ - - Trace((stderr, "calling readpng_get_image()\n")) - image_data = readpng_get_image(display_exponent, &image_channels, - &image_rowbytes); - Trace((stderr, "done with readpng_get_image()\n")) - - - /* done with PNG file, so clean up to minimize memory usage (but do NOT - * nuke image_data!) */ - - readpng_cleanup(FALSE); - fclose(infile); - - if (!image_data) { - fprintf(stderr, PROGNAME ": unable to decode PNG image\n"); - exit(3); - } - - - /* display image (composite with background if requested) */ - - Trace((stderr, "calling rpng_win_display_image()\n")) - if (rpng_win_display_image()) { - free(image_data); - exit(4); - } - Trace((stderr, "done with rpng_win_display_image()\n")) - - - /* wait for the user to tell us when to quit */ - - printf( -#ifndef __CYGWIN__ - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n" -#else - "Done. Press mouse button 1 (within image window) to quit.\n" -#endif - ); - fflush(stdout); - - while (GetMessage(&msg, NULL, 0, 0)) { - TranslateMessage(&msg); - DispatchMessage(&msg); - } - - - /* OK, we're done: clean up all image and Windows resources and go away */ - - rpng_win_cleanup(); - - return msg.wParam; -} - - - - - -static int rpng_win_create_window(HINSTANCE hInst, int showmode) -{ - uch *dest; - int extra_width, extra_height; - ulg i, j; - WNDCLASSEX wndclass; - - -/*--------------------------------------------------------------------------- - Allocate memory for the display-specific version of the image (round up - to multiple of 4 for Windows DIB). - ---------------------------------------------------------------------------*/ - - wimage_rowbytes = ((3*image_width + 3L) >> 2) << 2; - - if (!(dib = (uch *)malloc(sizeof(BITMAPINFOHEADER) + - wimage_rowbytes*image_height))) - { - return 4; /* fail */ - } - -/*--------------------------------------------------------------------------- - Initialize the DIB. Negative height means to use top-down BMP ordering - (must be uncompressed, but that's what we want). Bit count of 1, 4 or 8 - implies a colormap of RGBX quads, but 24-bit BMPs just use B,G,R values - directly => wimage_data begins immediately after BMP header. - ---------------------------------------------------------------------------*/ - - memset(dib, 0, sizeof(BITMAPINFOHEADER)); - bmih = (BITMAPINFOHEADER *)dib; - bmih->biSize = sizeof(BITMAPINFOHEADER); - bmih->biWidth = image_width; - bmih->biHeight = -((long)image_height); - bmih->biPlanes = 1; - bmih->biBitCount = 24; - bmih->biCompression = 0; - wimage_data = dib + sizeof(BITMAPINFOHEADER); - -/*--------------------------------------------------------------------------- - Fill in background color (black by default); data are in BGR order. - ---------------------------------------------------------------------------*/ - - for (j = 0; j < image_height; ++j) { - dest = wimage_data + j*wimage_rowbytes; - for (i = image_width; i > 0; --i) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } - } - -/*--------------------------------------------------------------------------- - Set the window parameters. - ---------------------------------------------------------------------------*/ - - memset(&wndclass, 0, sizeof(wndclass)); - - wndclass.cbSize = sizeof(wndclass); - wndclass.style = CS_HREDRAW | CS_VREDRAW; - wndclass.lpfnWndProc = rpng_win_wndproc; - wndclass.hInstance = hInst; - wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); - wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); - wndclass.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH); - wndclass.lpszMenuName = NULL; - wndclass.lpszClassName = progname; - wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION); - - RegisterClassEx(&wndclass); - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - extra_width = 2*(GetSystemMetrics(SM_CXBORDER) + - GetSystemMetrics(SM_CXDLGFRAME)); - extra_height = 2*(GetSystemMetrics(SM_CYBORDER) + - GetSystemMetrics(SM_CYDLGFRAME)) + - GetSystemMetrics(SM_CYCAPTION); - - global_hwnd = CreateWindow(progname, titlebar, WS_OVERLAPPEDWINDOW, - CW_USEDEFAULT, CW_USEDEFAULT, image_width+extra_width, - image_height+extra_height, NULL, NULL, hInst, NULL); - - ShowWindow(global_hwnd, showmode); - UpdateWindow(global_hwnd); - - return 0; - -} /* end function rpng_win_create_window() */ - - - - - -static int rpng_win_display_image() -{ - uch *src, *dest; - uch r, g, b, a; - ulg i, row, lastrow; - RECT rect; - - - Trace((stderr, "beginning display loop (image_channels == %d)\n", - image_channels)) - Trace((stderr, "(width = %ld, rowbytes = %ld, wimage_rowbytes = %d)\n", - image_width, image_rowbytes, wimage_rowbytes)) - - -/*--------------------------------------------------------------------------- - Blast image data to buffer. This whole routine takes place before the - message loop begins, so there's no real point in any pseudo-progressive - display... - ---------------------------------------------------------------------------*/ - - for (lastrow = row = 0; row < image_height; ++row) { - src = image_data + row*image_rowbytes; - dest = wimage_data + row*wimage_rowbytes; - if (image_channels == 3) { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - *dest++ = b; - *dest++ = g; /* note reverse order */ - *dest++ = r; - } - } else /* if (image_channels == 4) */ { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (a == 255) { - *dest++ = b; - *dest++ = g; - *dest++ = r; - } else if (a == 0) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } else { - /* this macro (copied from png.h) composites the - * foreground and background values and puts the - * result into the first argument; there are no - * side effects with the first argument */ - alpha_composite(*dest++, b, a, bg_blue); - alpha_composite(*dest++, g, a, bg_green); - alpha_composite(*dest++, r, a, bg_red); - } - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - rect.left = 0L; - rect.top = (LONG)lastrow; - rect.right = (LONG)image_width; /* possibly off by one? */ - rect.bottom = (LONG)lastrow + 16L; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - lastrow = row + 1; - } - } - - Trace((stderr, "calling final image-flush routine\n")) - if (lastrow < image_height) { - rect.left = 0L; - rect.top = (LONG)lastrow; - rect.right = (LONG)image_width; /* possibly off by one? */ - rect.bottom = (LONG)image_height; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - } - -/* - last param determines whether or not background is wiped before paint - InvalidateRect(global_hwnd, NULL, TRUE); - UpdateWindow(global_hwnd); - */ - - return 0; -} - - - - - -static void rpng_win_cleanup() -{ - if (image_data) { - free(image_data); - image_data = NULL; - } - - if (dib) { - free(dib); - dib = NULL; - } -} - - - - - -LRESULT CALLBACK rpng_win_wndproc(HWND hwnd, UINT iMsg, WPARAM wP, LPARAM lP) -{ - HDC hdc; - PAINTSTRUCT ps; - int rc; - - switch (iMsg) { - case WM_CREATE: - /* one-time processing here, if any */ - return 0; - - case WM_PAINT: - hdc = BeginPaint(hwnd, &ps); - /* dest */ - rc = StretchDIBits(hdc, 0, 0, image_width, image_height, - /* source */ - 0, 0, image_width, image_height, - wimage_data, (BITMAPINFO *)bmih, - /* iUsage: no clue */ - 0, SRCCOPY); - EndPaint(hwnd, &ps); - return 0; - - /* wait for the user to tell us when to quit */ - case WM_CHAR: - switch (wP) { /* only need one, so ignore repeat count */ - case 'q': - case 'Q': - case 0x1B: /* Esc key */ - PostQuitMessage(0); - } - return 0; - - case WM_LBUTTONDOWN: /* another way of quitting */ - case WM_DESTROY: - PostQuitMessage(0); - return 0; - } - - return DefWindowProc(hwnd, iMsg, wP, lP); -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng-x.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng-x.c deleted file mode 100644 index ddd7c58d6f3..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng-x.c +++ /dev/null @@ -1,910 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program rpng-x.c - - This program decodes and displays PNG images, with gamma correction and - optionally with a user-specified background color (in case the image has - transparency). It is very nearly the most basic PNG viewer possible. - This version is for the X Window System (tested by author under Unix and - by Martin Zinser under OpenVMS; may work under OS/2 with some tweaking). - - to do: - - 8-bit (colormapped) X support - - use %.1023s to simplify truncation of title-bar string? - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: modified to allow abbreviated options; fixed long/ulong mis- - match; switched to png_jmpbuf() macro - - 1.10: added support for non-default visuals; fixed X pixel-conversion - - 1.11: added extra set of parentheses to png_jmpbuf() macro; fixed - command-line parsing bug - - 1.12: fixed some small X memory leaks (thanks to François Petitjean) - - 1.13: fixed XFreeGC() crash bug (thanks to Patrick Welche) - - 1.14: added support for X resources (thanks to Gerhard Niklasch) - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed improper display of usage screen on PNG error(s) - - 2.02: Added "void(argc);" statement to quiet pedantic compiler warnings - about unused variable (GR-P) - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng-x" -#define LONGNAME "Simple PNG Viewer for X" -#define VERSION "2.02 of 15 June 2014" -#define RESNAME "rpng" /* our X resource application name */ -#define RESCLASS "Rpng" /* our X resource class name */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <X11/Xlib.h> -#include <X11/Xutil.h> -#include <X11/Xos.h> -#include <X11/keysym.h> - -/* #define DEBUG : this enables the Trace() macros */ - -#include "readpng.h" /* typedefs, common macros, readpng prototypes */ - - -/* could just include png.h, but this macro is the only thing we need - * (name and typedefs changed to local versions); note that side effects - * only happen with alpha (which could easily be avoided with - * "ush acopy = (alpha);") */ - -#define alpha_composite(composite, fg, alpha, bg) { \ - ush temp = ((ush)(fg)*(ush)(alpha) + \ - (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \ - (composite) = (uch)((temp + (temp >> 8)) >> 8); \ -} - - -/* local prototypes */ -static int rpng_x_create_window(void); -static int rpng_x_display_image(void); -static void rpng_x_cleanup(void); -static int rpng_x_msb(ulg u32val); - - -static char titlebar[1024], *window_name = titlebar; -static char *appname = LONGNAME; -static char *icon_name = PROGNAME; -static char *res_name = RESNAME; -static char *res_class = RESCLASS; -static char *filename; -static FILE *infile; - -static char *bgstr; -static uch bg_red=0, bg_green=0, bg_blue=0; - -static double display_exponent; - -static ulg image_width, image_height, image_rowbytes; -static int image_channels; -static uch *image_data; - -/* X-specific variables */ -static char *displayname; -static XImage *ximage; -static Display *display; -static int depth; -static Visual *visual; -static XVisualInfo *visual_list; -static int RShift, GShift, BShift; -static ulg RMask, GMask, BMask; -static Window window; -static GC gc; -static Colormap colormap; - -static int have_nondefault_visual = FALSE; -static int have_colormap = FALSE; -static int have_window = FALSE; -static int have_gc = FALSE; -/* -ulg numcolors=0, pixels[256]; -ush reds[256], greens[256], blues[256]; - */ - - - - -int main(int argc, char **argv) -{ -#ifdef sgi - char tmpline[80]; -#endif - char *p; - int rc, alen, flen; - int error = 0; - int have_bg = FALSE; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - XEvent e; - KeySym k; - - - displayname = (char *)NULL; - filename = (char *)NULL; - - - /* First set the default value for our display-system exponent, i.e., - * the product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. */ - -#if defined(NeXT) - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to get the - * "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - display_exponent = atof(p); - else - display_exponent = default_display_exponent; - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-display", 2)) { - if (!*++argv) - ++error; - else - displayname = *argv; - } else if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - display_exponent = atof(*argv); - if (display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 2)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else - have_bg = TRUE; - } - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname); - readpng_version_info(); - fprintf(stderr, "\n" - "Usage: %s [-display xdpy] [-gamma exp] [-bgcolor bg] file.png\n" - " xdpy\tname of the target X display (e.g., ``hostname:0'')\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n", - PROGNAME, default_display_exponent); - - fprintf(stderr, "\n" - "\t\t to the product of the lookup-table exponent (varies)\n" - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images\n" - "\nPress Q, Esc or mouse button 1 (within image window, after image\n" - "is displayed) to quit.\n"); - exit(1); - } - - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - if ((rc = readpng_init(infile, &image_width, &image_height)) != 0) { - switch (rc) { - case 1: - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - break; - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng_init() error\n"); - break; - } - ++error; - } else { - display = XOpenDisplay(displayname); - if (!display) { - readpng_cleanup(TRUE); - fprintf(stderr, PROGNAME ": can't open X display [%s]\n", - displayname? displayname : "default"); - ++error; - } - } - if (error) - fclose(infile); - } - - - if (error) { - fprintf(stderr, PROGNAME ": aborting.\n"); - exit(2); - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* if the user didn't specify a background color on the command line, - * check for one in the PNG file--if not, the initialized values of 0 - * (black) will be used */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - bg_red = (uch)r; - bg_green = (uch)g; - bg_blue = (uch)b; - } else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) { - readpng_cleanup(TRUE); - fprintf(stderr, PROGNAME - ": libpng error while checking for background color\n"); - exit(2); - } - - - /* do the basic X initialization stuff, make the window and fill it - * with the background color */ - - if (rpng_x_create_window()) - exit(2); - - - /* decode the image, all at once */ - - Trace((stderr, "calling readpng_get_image()\n")) - image_data = readpng_get_image(display_exponent, &image_channels, - &image_rowbytes); - Trace((stderr, "done with readpng_get_image()\n")) - - - /* done with PNG file, so clean up to minimize memory usage (but do NOT - * nuke image_data!) */ - - readpng_cleanup(FALSE); - fclose(infile); - - if (!image_data) { - fprintf(stderr, PROGNAME ": unable to decode PNG image\n"); - exit(3); - } - - - /* display image (composite with background if requested) */ - - Trace((stderr, "calling rpng_x_display_image()\n")) - if (rpng_x_display_image()) { - free(image_data); - exit(4); - } - Trace((stderr, "done with rpng_x_display_image()\n")) - - - /* wait for the user to tell us when to quit */ - - printf( - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n"); - fflush(stdout); - - do - XNextEvent(display, &e); - while (!(e.type == ButtonPress && e.xbutton.button == Button1) && - !(e.type == KeyPress && /* v--- or 1 for shifted keys */ - ((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape) )); - - - /* OK, we're done: clean up all image and X resources and go away */ - - rpng_x_cleanup(); - - (void)argc; /* Unused */ - - return 0; -} - - - - - -static int rpng_x_create_window(void) -{ - uch *xdata; - int need_colormap = FALSE; - int screen, pad; - ulg bg_pixel = 0L; - ulg attrmask; - Window root; - XEvent e; - XGCValues gcvalues; - XSetWindowAttributes attr; - XTextProperty windowName, *pWindowName = &windowName; - XTextProperty iconName, *pIconName = &iconName; - XVisualInfo visual_info; - XSizeHints *size_hints; - XWMHints *wm_hints; - XClassHint *class_hints; - - - screen = DefaultScreen(display); - depth = DisplayPlanes(display, screen); - root = RootWindow(display, screen); - -#ifdef DEBUG - XSynchronize(display, True); -#endif - -#if 0 -/* GRR: add 8-bit support */ - if (/* depth != 8 && */ depth != 16 && depth != 24 && depth != 32) { - fprintf(stderr, - "screen depth %d not supported (only 16-, 24- or 32-bit TrueColor)\n", - depth); - return 2; - } - - XMatchVisualInfo(display, screen, depth, - (depth == 8)? PseudoColor : TrueColor, &visual_info); - visual = visual_info.visual; -#else - if (depth != 16 && depth != 24 && depth != 32) { - int visuals_matched = 0; - - Trace((stderr, "default depth is %d: checking other visuals\n", - depth)) - - /* 24-bit first */ - visual_info.screen = screen; - visual_info.depth = 24; - visual_list = XGetVisualInfo(display, - VisualScreenMask | VisualDepthMask, &visual_info, &visuals_matched); - if (visuals_matched == 0) { -/* GRR: add 15-, 16- and 32-bit TrueColor visuals (also DirectColor?) */ - fprintf(stderr, "default screen depth %d not supported, and no" - " 24-bit visuals found\n", depth); - return 2; - } - Trace((stderr, "XGetVisualInfo() returned %d 24-bit visuals\n", - visuals_matched)) - visual = visual_list[0].visual; - depth = visual_list[0].depth; -/* - colormap_size = visual_list[0].colormap_size; - visual_class = visual->class; - visualID = XVisualIDFromVisual(visual); - */ - have_nondefault_visual = TRUE; - need_colormap = TRUE; - } else { - XMatchVisualInfo(display, screen, depth, TrueColor, &visual_info); - visual = visual_info.visual; - } -#endif - - RMask = visual->red_mask; - GMask = visual->green_mask; - BMask = visual->blue_mask; - -/* GRR: add/check 8-bit support */ - if (depth == 8 || need_colormap) { - colormap = XCreateColormap(display, root, visual, AllocNone); - if (!colormap) { - fprintf(stderr, "XCreateColormap() failed\n"); - return 2; - } - have_colormap = TRUE; - } - if (depth == 15 || depth == 16) { - RShift = 15 - rpng_x_msb(RMask); /* these are right-shifts */ - GShift = 15 - rpng_x_msb(GMask); - BShift = 15 - rpng_x_msb(BMask); - } else if (depth > 16) { -#define NO_24BIT_MASKS -#ifdef NO_24BIT_MASKS - RShift = rpng_x_msb(RMask) - 7; /* these are left-shifts */ - GShift = rpng_x_msb(GMask) - 7; - BShift = rpng_x_msb(BMask) - 7; -#else - RShift = 7 - rpng_x_msb(RMask); /* these are right-shifts, too */ - GShift = 7 - rpng_x_msb(GMask); - BShift = 7 - rpng_x_msb(BMask); -#endif - } - if (depth >= 15 && (RShift < 0 || GShift < 0 || BShift < 0)) { - fprintf(stderr, "rpng internal logic error: negative X shift(s)!\n"); - return 2; - } - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - attr.backing_store = Always; - attr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask; - attrmask = CWBackingStore | CWEventMask; - if (have_nondefault_visual) { - attr.colormap = colormap; - attr.background_pixel = 0; - attr.border_pixel = 1; - attrmask |= CWColormap | CWBackPixel | CWBorderPixel; - } - - window = XCreateWindow(display, root, 0, 0, image_width, image_height, 0, - depth, InputOutput, visual, attrmask, &attr); - - if (window == None) { - fprintf(stderr, "XCreateWindow() failed\n"); - return 2; - } else - have_window = TRUE; - - if (depth == 8) - XSetWindowColormap(display, window, colormap); - - if (!XStringListToTextProperty(&window_name, 1, pWindowName)) - pWindowName = NULL; - if (!XStringListToTextProperty(&icon_name, 1, pIconName)) - pIconName = NULL; - - /* OK if any hints allocation fails; XSetWMProperties() allows NULLs */ - - if ((size_hints = XAllocSizeHints()) != NULL) { - /* window will not be resizable */ - size_hints->flags = PMinSize | PMaxSize; - size_hints->min_width = size_hints->max_width = (int)image_width; - size_hints->min_height = size_hints->max_height = (int)image_height; - } - - if ((wm_hints = XAllocWMHints()) != NULL) { - wm_hints->initial_state = NormalState; - wm_hints->input = True; - /* wm_hints->icon_pixmap = icon_pixmap; */ - wm_hints->flags = StateHint | InputHint /* | IconPixmapHint */ ; - } - - if ((class_hints = XAllocClassHint()) != NULL) { - class_hints->res_name = res_name; - class_hints->res_class = res_class; - } - - XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0, - size_hints, wm_hints, class_hints); - - /* various properties and hints no longer needed; free memory */ - if (pWindowName) - XFree(pWindowName->value); - if (pIconName) - XFree(pIconName->value); - if (size_hints) - XFree(size_hints); - if (wm_hints) - XFree(wm_hints); - if (class_hints) - XFree(class_hints); - - XMapWindow(display, window); - - gc = XCreateGC(display, window, 0, &gcvalues); - have_gc = TRUE; - -/*--------------------------------------------------------------------------- - Fill window with the specified background color. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - bg_pixel = ((ulg)bg_red << RShift) | - ((ulg)bg_green << GShift) | - ((ulg)bg_blue << BShift); - } else if (depth == 16) { - bg_pixel = ((((ulg)bg_red << 8) >> RShift) & RMask) | - ((((ulg)bg_green << 8) >> GShift) & GMask) | - ((((ulg)bg_blue << 8) >> BShift) & BMask); - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - XSetForeground(display, gc, bg_pixel); - XFillRectangle(display, window, gc, 0, 0, image_width, image_height); - -/*--------------------------------------------------------------------------- - Wait for first Expose event to do any drawing, then flush. - ---------------------------------------------------------------------------*/ - - do - XNextEvent(display, &e); - while (e.type != Expose || e.xexpose.count); - - XFlush(display); - -/*--------------------------------------------------------------------------- - Allocate memory for the X- and display-specific version of the image. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - xdata = (uch *)malloc(4*image_width*image_height); - pad = 32; - } else if (depth == 16) { - xdata = (uch *)malloc(2*image_width*image_height); - pad = 16; - } else /* depth == 8 */ { - xdata = (uch *)malloc(image_width*image_height); - pad = 8; - } - - if (!xdata) { - fprintf(stderr, PROGNAME ": unable to allocate image memory\n"); - return 4; - } - - ximage = XCreateImage(display, visual, depth, ZPixmap, 0, - (char *)xdata, image_width, image_height, pad, 0); - - if (!ximage) { - fprintf(stderr, PROGNAME ": XCreateImage() failed\n"); - free(xdata); - return 3; - } - - /* to avoid testing the byte order every pixel (or doubling the size of - * the drawing routine with a giant if-test), we arbitrarily set the byte - * order to MSBFirst and let Xlib worry about inverting things on little- - * endian machines (like Linux/x86, old VAXen, etc.)--this is not the most - * efficient approach (the giant if-test would be better), but in the - * interest of clarity, we take the easy way out... */ - - ximage->byte_order = MSBFirst; - - return 0; - -} /* end function rpng_x_create_window() */ - - - - - -static int rpng_x_display_image(void) -{ - uch *src; - char *dest; - uch r, g, b, a; - ulg i, row, lastrow = 0; - ulg pixel; - int ximage_rowbytes = ximage->bytes_per_line; -/* int bpp = ximage->bits_per_pixel; */ - - - Trace((stderr, "beginning display loop (image_channels == %d)\n", - image_channels)) - Trace((stderr, " (width = %ld, rowbytes = %ld, ximage_rowbytes = %d)\n", - image_width, image_rowbytes, ximage_rowbytes)) - Trace((stderr, " (bpp = %d)\n", ximage->bits_per_pixel)) - Trace((stderr, " (byte_order = %s)\n", ximage->byte_order == MSBFirst? - "MSBFirst" : (ximage->byte_order == LSBFirst? "LSBFirst" : "unknown"))) - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - - for (lastrow = row = 0; row < image_height; ++row) { - src = image_data + row*image_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (image_channels == 3) { - for (i = image_width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; -#ifdef NO_24BIT_MASKS - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - /* GRR BUG: this assumes bpp == 32, but may be 24: */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); -#else - red = (RShift < 0)? red << (-RShift) : red >> RShift; - green = (GShift < 0)? green << (-GShift) : green >> GShift; - blue = (BShift < 0)? blue << (-BShift) : blue >> BShift; - pixel = (red & RMask) | (green & GMask) | (blue & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); -#endif - } - } else /* if (image_channels == 4) */ { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (a == 255) { - red = r; - green = g; - blue = b; - } else if (a == 0) { - red = bg_red; - green = bg_green; - blue = bg_blue; - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result into the - * first argument */ - alpha_composite(red, r, a, bg_red); - alpha_composite(green, g, a, bg_green); - alpha_composite(blue, b, a, bg_blue); - } - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, image_width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else if (depth == 16) { - ush red, green, blue; - - for (lastrow = row = 0; row < image_height; ++row) { - src = image_data + row*image_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (image_channels == 3) { - for (i = image_width; i > 0; --i) { - red = ((ush)(*src) << 8); - ++src; - green = ((ush)(*src) << 8); - ++src; - blue = ((ush)(*src) << 8); - ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else /* if (image_channels == 4) */ { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (a == 255) { - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } else if (a == 0) { - red = ((ush)bg_red << 8); - green = ((ush)bg_green << 8); - blue = ((ush)bg_blue << 8); - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result back into - * the first argument (== fg byte here: safe) */ - alpha_composite(r, r, a, bg_red); - alpha_composite(g, g, a, bg_green); - alpha_composite(b, b, a, bg_blue); - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, image_width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - Trace((stderr, "calling final XPutImage()\n")) - if (lastrow < image_height) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, image_width, image_height-lastrow); - XFlush(display); - } - - return 0; -} - - - - -static void rpng_x_cleanup(void) -{ - if (image_data) { - free(image_data); - image_data = NULL; - } - - if (ximage) { - if (ximage->data) { - free(ximage->data); /* we allocated it, so we free it */ - ximage->data = (char *)NULL; /* instead of XDestroyImage() */ - } - XDestroyImage(ximage); - ximage = NULL; - } - - if (have_gc) - XFreeGC(display, gc); - - if (have_window) - XDestroyWindow(display, window); - - if (have_colormap) - XFreeColormap(display, colormap); - - if (have_nondefault_visual) - XFree(visual_list); -} - - - - - -static int rpng_x_msb(ulg u32val) -{ - int i; - - for (i = 31; i >= 0; --i) { - if (u32val & 0x80000000L) - break; - u32val <<= 1; - } - return i; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng2-win.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng2-win.c deleted file mode 100644 index eda176eee33..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng2-win.c +++ /dev/null @@ -1,1255 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program rpng2-win.c - - This program decodes and displays PNG files progressively, as if it were - a web browser (though the front end is only set up to read from files). - It supports gamma correction, user-specified background colors, and user- - specified background patterns (for transparent images). This version is - for 32-bit Windows; it may compile under 16-bit Windows with a little - tweaking (or maybe not). Thanks to Adam Costello and Pieter S. van der - Meulen for the "diamond" and "radial waves" patterns, respectively. - - to do (someday, maybe): - - handle quoted command-line args (especially filenames with spaces) - - finish resizable checkerboard-gradient (sizes 4-128?) - - use %.1023s to simplify truncation of title-bar string? - - have minimum window width: oh well - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: fixed cut-and-paste error in usage screen (oops...) - - 1.03: modified to allow abbreviated options - - 1.04: removed bogus extra argument from usage fprintf() [Glenn R-P?]; - fixed command-line parsing bug - - 1.10: enabled "message window"/console (thanks to David Geldreich) - - 1.20: added runtime MMX-enabling/disabling and new -mmx* options - - 1.21: made minor tweak to usage screen to fit within 25-line console - - 1.22: added AMD64/EM64T support (__x86_64__) - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed 64-bit typo in readpng2.c - - 2.02: fixed improper display of usage screen on PNG error(s); fixed - unexpected-EOF and file-read-error cases - - 2.03: removed runtime MMX-enabling/disabling and obsolete -mmx* options - - 2.04: - (GR-P) - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng2-win" -#define LONGNAME "Progressive PNG Viewer for Windows" -#define VERSION "2.02 of 16 March 2008" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <setjmp.h> /* for jmpbuf declaration in readpng2.h */ -#include <time.h> -#include <math.h> /* only for PvdM background code */ -#include <windows.h> -#ifdef __CYGWIN__ -/* getch replacement. Turns out, we don't really need this, - * but leave it here if we ever enable any of the uses of - * _getch in the main code - */ -#include <unistd.h> -#include <termio.h> -#include <sys/ioctl.h> -int repl_getch( void ) -{ - char ch; - int fd = fileno(stdin); - struct termio old_tty, new_tty; - - ioctl(fd, TCGETA, &old_tty); - new_tty = old_tty; - new_tty.c_lflag &= ~(ICANON | ECHO | ISIG); - ioctl(fd, TCSETA, &new_tty); - fread(&ch, 1, sizeof(ch), stdin); - ioctl(fd, TCSETA, &old_tty); - - return ch; -} -#define _getch repl_getch -#else -#include <conio.h> /* only for _getch() */ -#endif - -/* all for PvdM background code: */ -#ifndef PI -# define PI 3.141592653589793238 -#endif -#define PI_2 (PI*0.5) -#define INV_PI_360 (360.0 / PI) -#define MAX(a,b) (a>b?a:b) -#define MIN(a,b) (a<b?a:b) -#define CLIP(a,min,max) MAX(min,MIN((a),max)) -#define ABS(a) ((a)<0?-(a):(a)) -#define CLIP8P(c) MAX(0,(MIN((c),255))) /* 8-bit pos. integer (uch) */ -#define ROUNDF(f) ((int)(f + 0.5)) - -#define rgb1_max bg_freq -#define rgb1_min bg_gray -#define rgb2_max bg_bsat -#define rgb2_min bg_brot - -/* #define DEBUG */ /* this enables the Trace() macros */ - -#include "readpng2.h" /* typedefs, common macros, readpng2 prototypes */ - - -/* could just include png.h, but this macro is the only thing we need - * (name and typedefs changed to local versions); note that side effects - * only happen with alpha (which could easily be avoided with - * "ush acopy = (alpha);") */ - -#define alpha_composite(composite, fg, alpha, bg) { \ - ush temp = ((ush)(fg)*(ush)(alpha) + \ - (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \ - (composite) = (uch)((temp + (temp >> 8)) >> 8); \ -} - - -#define INBUFSIZE 4096 /* with pseudo-timing on (1 sec delay/block), this - * block size corresponds roughly to a download - * speed 10% faster than theoretical 33.6K maximum - * (assuming 8 data bits, 1 stop bit and no other - * overhead) */ - -/* local prototypes */ -static void rpng2_win_init(void); -static int rpng2_win_create_window(void); -static int rpng2_win_load_bg_image(void); -static void rpng2_win_display_row(ulg row); -static void rpng2_win_finish_display(void); -static void rpng2_win_cleanup(void); -LRESULT CALLBACK rpng2_win_wndproc(HWND, UINT, WPARAM, LPARAM); - - -static char titlebar[1024]; -static char *progname = PROGNAME; -static char *appname = LONGNAME; -static char *filename; -static FILE *infile; - -static mainprog_info rpng2_info; - -static uch inbuf[INBUFSIZE]; -static int incount; - -static int pat = 6; /* must be less than num_bgpat */ -static int bg_image = 0; -static int bgscale = 16; -static ulg bg_rowbytes; -static uch *bg_data; - -static struct rgb_color { - uch r, g, b; -} rgb[] = { - { 0, 0, 0}, /* 0: black */ - {255, 255, 255}, /* 1: white */ - {173, 132, 57}, /* 2: tan */ - { 64, 132, 0}, /* 3: medium green */ - {189, 117, 1}, /* 4: gold */ - {253, 249, 1}, /* 5: yellow */ - { 0, 0, 255}, /* 6: blue */ - { 0, 0, 120}, /* 7: medium blue */ - {255, 0, 255}, /* 8: magenta */ - { 64, 0, 64}, /* 9: dark magenta */ - {255, 0, 0}, /* 10: red */ - { 64, 0, 0}, /* 11: dark red */ - {255, 127, 0}, /* 12: orange */ - {192, 96, 0}, /* 13: darker orange */ - { 24, 60, 0}, /* 14: dark green-yellow */ - { 85, 125, 200} /* 15: ice blue */ -}; -/* not used for now, but should be for error-checking: -static int num_rgb = sizeof(rgb) / sizeof(struct rgb_color); - */ - -/* - This whole struct is a fairly cheesy way to keep the number of - command-line options to a minimum. The radial-waves background - type is a particularly poor fit to the integer elements of the - struct...but a few macros and a little fixed-point math will do - wonders for ya. - - type bits: - F E D C B A 9 8 7 6 5 4 3 2 1 0 - | | | | | - | | +-+-+-- 0 = sharp-edged checkerboard - | | 1 = soft diamonds - | | 2 = radial waves - | | 3-7 = undefined - | +-- gradient #2 inverted? - +-- alternating columns inverted? - */ -static struct background_pattern { - ush type; - int rgb1_max, rgb1_min; /* or bg_freq, bg_gray */ - int rgb2_max, rgb2_min; /* or bg_bsat, bg_brot (both scaled by 10)*/ -} bg[] = { - {0+8, 2,0, 1,15}, /* checkered: tan/black vs. white/ice blue */ - {0+24, 2,0, 1,0}, /* checkered: tan/black vs. white/black */ - {0+8, 4,5, 0,2}, /* checkered: gold/yellow vs. black/tan */ - {0+8, 4,5, 0,6}, /* checkered: gold/yellow vs. black/blue */ - {0, 7,0, 8,9}, /* checkered: deep blue/black vs. magenta */ - {0+8, 13,0, 5,14}, /* checkered: orange/black vs. yellow */ - {0+8, 12,0, 10,11}, /* checkered: orange/black vs. red */ - {1, 7,0, 8,0}, /* diamonds: deep blue/black vs. magenta */ - {1, 12,0, 11,0}, /* diamonds: orange vs. dark red */ - {1, 10,0, 7,0}, /* diamonds: red vs. medium blue */ - {1, 4,0, 5,0}, /* diamonds: gold vs. yellow */ - {1, 3,0, 0,0}, /* diamonds: medium green vs. black */ - {2, 16, 100, 20, 0}, /* radial: ~hard radial color-beams */ - {2, 18, 100, 10, 2}, /* radial: soft, curved radial color-beams */ - {2, 16, 256, 100, 250}, /* radial: very tight spiral */ - {2, 10000, 256, 11, 0} /* radial: dipole-moire' (almost fractal) */ -}; -static int num_bgpat = sizeof(bg) / sizeof(struct background_pattern); - - -/* Windows-specific global variables (could go in struct, but messy...) */ -static ulg wimage_rowbytes; -static uch *dib; -static uch *wimage_data; -static BITMAPINFOHEADER *bmih; - -static HWND global_hwnd; -static HINSTANCE global_hInst; -static int global_showmode; - - - - -int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode) -{ - char *args[1024]; /* arbitrary limit, but should suffice */ - char **argv = args; - char *p, *q, *bgstr = NULL; - int argc = 0; - int rc, alen, flen; - int error = 0; - int timing = FALSE; - int have_bg = FALSE; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - MSG msg; - - - /* First initialize a few things, just to be sure--memset takes care of - * default background color (black), booleans (FALSE), pointers (NULL), - * etc. */ - - global_hInst = hInst; - global_showmode = showmode; - filename = (char *)NULL; - memset(&rpng2_info, 0, sizeof(mainprog_info)); - -#ifndef __CYGWIN__ - /* Next reenable console output, which normally goes to the bit bucket - * for windowed apps. Closing the console window will terminate the - * app. Thanks to David.Geldreich@realviz.com for supplying the magical - * incantation. */ - - AllocConsole(); - freopen("CONOUT$", "a", stderr); - freopen("CONOUT$", "a", stdout); -#endif - - /* Set the default value for our display-system exponent, i.e., the - * product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. And - * yes, these ifdefs are completely wasted in a Windows program... */ - -#if defined(NeXT) - /* third-party utilities can modify the default LUT exponent */ - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to - * get the "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - rpng2_info.display_exponent = atof(p); - else - rpng2_info.display_exponent = default_display_exponent; - - - /* Windows really hates command lines, so we have to set up our own argv. - * Note that we do NOT bother with quoted arguments here, so don't use - * filenames with spaces in 'em! */ - - argv[argc++] = PROGNAME; - p = cmd; - for (;;) { - if (*p == ' ') - while (*++p == ' ') - ; - /* now p points at the first non-space after some spaces */ - if (*p == '\0') - break; /* nothing after the spaces: done */ - argv[argc++] = q = p; - while (*q && *q != ' ') - ++q; - /* now q points at a space or the end of the string */ - if (*q == '\0') - break; /* last argv already terminated; quit */ - *q = '\0'; /* change space to terminator */ - p = q + 1; - } - argv[argc] = NULL; /* terminate the argv array itself */ - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - rpng2_info.display_exponent = atof(*argv); - if (rpng2_info.display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 4)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else { - have_bg = TRUE; - bg_image = FALSE; - } - } - } else if (!strncmp(*argv, "-bgpat", 4)) { - if (!*++argv) - ++error; - else { - pat = atoi(*argv) - 1; - if (pat < 0 || pat >= num_bgpat) - ++error; - else { - bg_image = TRUE; - have_bg = FALSE; - } - } - } else if (!strncmp(*argv, "-timing", 2)) { - timing = TRUE; - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); - readpng2_version_info(); - fprintf(stderr, "\n" - "Usage: %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n" - " %*s file.png\n\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" - "\t\t to the product of the lookup-table exponent (varies)\n" - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images; overrides -bgpat option\n" - " pat \tdesired background pattern number (1-%d); used with\n" - "\t\t transparent images; overrides -bgcolor option\n" - " -timing\tenables delay for every block read, to simulate modem\n" - "\t\t download of image (~36 Kbps)\n" - "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n" -#ifndef __CYGWIN__ - "Press Q or Esc to quit this usage screen. ", -#else - , -#endif - PROGNAME, -#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \ - !(defined(__CYGWIN__) || defined(__MINGW32__)) - (int)strlen(PROGNAME), " ", -#endif - (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat); - fflush(stderr); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(1); - } - - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - incount = fread(inbuf, 1, INBUFSIZE, infile); - if (incount < 8 || !readpng2_check_sig(inbuf, 8)) { - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - ++error; - } else if ((rc = readpng2_init(&rpng2_info)) != 0) { - switch (rc) { - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng2_init() error\n"); - break; - } - ++error; - } - if (error) - fclose(infile); - } - - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, PROGNAME ": aborting.\n"); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(2); - } else { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname); -#ifndef __CYGWIN__ - fprintf(stderr, - "\n [console window: closing this window will terminate %s]\n\n", - PROGNAME); -#endif - fflush(stderr); - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* set some final rpng2_info variables before entering main data loop */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - rpng2_info.bg_red = (uch)r; - rpng2_info.bg_green = (uch)g; - rpng2_info.bg_blue = (uch)b; - } else - rpng2_info.need_bgcolor = TRUE; - - rpng2_info.state = kPreInit; - rpng2_info.mainprog_init = rpng2_win_init; - rpng2_info.mainprog_display_row = rpng2_win_display_row; - rpng2_info.mainprog_finish_display = rpng2_win_finish_display; - - - /* OK, this is the fun part: call readpng2_decode_data() at the start of - * the loop to deal with our first buffer of data (read in above to verify - * that the file is a PNG image), then loop through the file and continue - * calling the same routine to handle each chunk of data. It in turn - * passes the data to libpng, which will invoke one or more of our call- - * backs as decoded data become available. We optionally call Sleep() for - * one second per iteration to simulate downloading the image via an analog - * modem. */ - - for (;;) { - Trace((stderr, "about to call readpng2_decode_data()\n")) - if (readpng2_decode_data(&rpng2_info, inbuf, incount)) - ++error; - Trace((stderr, "done with readpng2_decode_data()\n")) - - if (error || incount != INBUFSIZE || rpng2_info.state == kDone) { - if (rpng2_info.state == kDone) { - Trace((stderr, "done decoding PNG image\n")) - } else if (ferror(infile)) { - fprintf(stderr, PROGNAME - ": error while reading PNG image file\n"); - exit(3); - } else if (feof(infile)) { - fprintf(stderr, PROGNAME ": end of file reached " - "(unexpectedly) while reading PNG image file\n"); - exit(3); - } else /* if (error) */ { - /* will print error message below */ - } - break; - } - - if (timing) - Sleep(1000L); - - incount = fread(inbuf, 1, INBUFSIZE, infile); - } - - - /* clean up PNG stuff and report any decoding errors */ - - fclose(infile); - Trace((stderr, "about to call readpng2_cleanup()\n")) - readpng2_cleanup(&rpng2_info); - - if (error) { - fprintf(stderr, PROGNAME ": libpng error while decoding PNG image\n"); - exit(3); - } - - - /* wait for the user to tell us when to quit */ - - while (GetMessage(&msg, NULL, 0, 0)) { - TranslateMessage(&msg); - DispatchMessage(&msg); - } - - - /* we're done: clean up all image and Windows resources and go away */ - - Trace((stderr, "about to call rpng2_win_cleanup()\n")) - rpng2_win_cleanup(); - - return msg.wParam; -} - - - - - -/* this function is called by readpng2_info_callback() in readpng2.c, which - * in turn is called by libpng after all of the pre-IDAT chunks have been - * read and processed--i.e., we now have enough info to finish initializing */ - -static void rpng2_win_init() -{ - ulg i; - ulg rowbytes = rpng2_info.rowbytes; - - Trace((stderr, "beginning rpng2_win_init()\n")) - Trace((stderr, " rowbytes = %d\n", rpng2_info.rowbytes)) - Trace((stderr, " width = %ld\n", rpng2_info.width)) - Trace((stderr, " height = %ld\n", rpng2_info.height)) - - rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height); - if (!rpng2_info.image_data) { - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.row_pointers = (uch **)malloc(rpng2_info.height * sizeof(uch *)); - if (!rpng2_info.row_pointers) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - readpng2_cleanup(&rpng2_info); - return; - } - - for (i = 0; i < rpng2_info.height; ++i) - rpng2_info.row_pointers[i] = rpng2_info.image_data + i*rowbytes; - -/*--------------------------------------------------------------------------- - Do the basic Windows initialization stuff, make the window, and fill it - with the user-specified, file-specified or default background color. - ---------------------------------------------------------------------------*/ - - if (rpng2_win_create_window()) { - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.state = kWindowInit; -} - - - - - -static int rpng2_win_create_window() -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *dest; - int extra_width, extra_height; - ulg i, j; - WNDCLASSEX wndclass; - RECT rect; - - -/*--------------------------------------------------------------------------- - Allocate memory for the display-specific version of the image (round up - to multiple of 4 for Windows DIB). - ---------------------------------------------------------------------------*/ - - wimage_rowbytes = ((3*rpng2_info.width + 3L) >> 2) << 2; - - if (!(dib = (uch *)malloc(sizeof(BITMAPINFOHEADER) + - wimage_rowbytes*rpng2_info.height))) - { - return 4; /* fail */ - } - -/*--------------------------------------------------------------------------- - Initialize the DIB. Negative height means to use top-down BMP ordering - (must be uncompressed, but that's what we want). Bit count of 1, 4 or 8 - implies a colormap of RGBX quads, but 24-bit BMPs just use B,G,R values - directly => wimage_data begins immediately after BMP header. - ---------------------------------------------------------------------------*/ - - memset(dib, 0, sizeof(BITMAPINFOHEADER)); - bmih = (BITMAPINFOHEADER *)dib; - bmih->biSize = sizeof(BITMAPINFOHEADER); - bmih->biWidth = rpng2_info.width; - bmih->biHeight = -((long)rpng2_info.height); - bmih->biPlanes = 1; - bmih->biBitCount = 24; - bmih->biCompression = 0; - wimage_data = dib + sizeof(BITMAPINFOHEADER); - -/*--------------------------------------------------------------------------- - Fill window with the specified background color (default is black), but - defer loading faked "background image" until window is displayed (may be - slow to compute). Data are in BGR order. - ---------------------------------------------------------------------------*/ - - if (bg_image) { /* just fill with black for now */ - memset(wimage_data, 0, wimage_rowbytes*rpng2_info.height); - } else { - for (j = 0; j < rpng2_info.height; ++j) { - dest = wimage_data + j*wimage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } - } - } - -/*--------------------------------------------------------------------------- - Set the window parameters. - ---------------------------------------------------------------------------*/ - - memset(&wndclass, 0, sizeof(wndclass)); - - wndclass.cbSize = sizeof(wndclass); - wndclass.style = CS_HREDRAW | CS_VREDRAW; - wndclass.lpfnWndProc = rpng2_win_wndproc; - wndclass.hInstance = global_hInst; - wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); - wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); - wndclass.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH); - wndclass.lpszMenuName = NULL; - wndclass.lpszClassName = progname; - wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION); - - RegisterClassEx(&wndclass); - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - extra_width = 2*(GetSystemMetrics(SM_CXBORDER) + - GetSystemMetrics(SM_CXDLGFRAME)); - extra_height = 2*(GetSystemMetrics(SM_CYBORDER) + - GetSystemMetrics(SM_CYDLGFRAME)) + - GetSystemMetrics(SM_CYCAPTION); - - global_hwnd = CreateWindow(progname, titlebar, WS_OVERLAPPEDWINDOW, - CW_USEDEFAULT, CW_USEDEFAULT, rpng2_info.width+extra_width, - rpng2_info.height+extra_height, NULL, NULL, global_hInst, NULL); - - ShowWindow(global_hwnd, global_showmode); - UpdateWindow(global_hwnd); - -/*--------------------------------------------------------------------------- - Now compute the background image and display it. If it fails (memory - allocation), revert to a plain background color. - ---------------------------------------------------------------------------*/ - - if (bg_image) { - static const char *msg = "Computing background image..."; - int x, y, len = strlen(msg); - HDC hdc = GetDC(global_hwnd); - TEXTMETRIC tm; - - GetTextMetrics(hdc, &tm); - x = (rpng2_info.width - len*tm.tmAveCharWidth)/2; - y = (rpng2_info.height - tm.tmHeight)/2; - SetBkMode(hdc, TRANSPARENT); - SetTextColor(hdc, GetSysColor(COLOR_HIGHLIGHTTEXT)); - /* this can still begin out of bounds even if x is positive (???): */ - TextOut(hdc, ((x < 0)? 0 : x), ((y < 0)? 0 : y), msg, len); - ReleaseDC(global_hwnd, hdc); - - rpng2_win_load_bg_image(); /* resets bg_image if fails */ - } - - if (!bg_image) { - for (j = 0; j < rpng2_info.height; ++j) { - dest = wimage_data + j*wimage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } - } - } - - rect.left = 0L; - rect.top = 0L; - rect.right = (LONG)rpng2_info.width; /* possibly off by one? */ - rect.bottom = (LONG)rpng2_info.height; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - - return 0; - -} /* end function rpng2_win_create_window() */ - - - - - -static int rpng2_win_load_bg_image() -{ - uch *src, *dest; - uch r1, r2, g1, g2, b1, b2; - uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv; - int k, hmax, max; - int xidx, yidx, yidx_max = (bgscale-1); - int even_odd_vert, even_odd_horiz, even_odd; - int invert_gradient2 = (bg[pat].type & 0x08); - int invert_column; - ulg i, row; - -/*--------------------------------------------------------------------------- - Allocate buffer for fake background image to be used with transparent - images; if this fails, revert to plain background color. - ---------------------------------------------------------------------------*/ - - bg_rowbytes = 3 * rpng2_info.width; - bg_data = (uch *)malloc(bg_rowbytes * rpng2_info.height); - if (!bg_data) { - fprintf(stderr, PROGNAME - ": unable to allocate memory for background image\n"); - bg_image = 0; - return 1; - } - -/*--------------------------------------------------------------------------- - Vertical gradients (ramps) in NxN squares, alternating direction and - colors (N == bgscale). - ---------------------------------------------------------------------------*/ - - if ((bg[pat].type & 0x07) == 0) { - uch r1_min = rgb[bg[pat].rgb1_min].r; - uch g1_min = rgb[bg[pat].rgb1_min].g; - uch b1_min = rgb[bg[pat].rgb1_min].b; - uch r2_min = rgb[bg[pat].rgb2_min].r; - uch g2_min = rgb[bg[pat].rgb2_min].g; - uch b2_min = rgb[bg[pat].rgb2_min].b; - int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min; - int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min; - int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min; - int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min; - int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min; - int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = row % bgscale; - even_odd_vert = (row / bgscale) & 1; - - r1 = r1_min + (r1_diff * yidx) / yidx_max; - g1 = g1_min + (g1_diff * yidx) / yidx_max; - b1 = b1_min + (b1_diff * yidx) / yidx_max; - r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max; - g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max; - b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max; - - r2 = r2_min + (r2_diff * yidx) / yidx_max; - g2 = g2_min + (g2_diff * yidx) / yidx_max; - b2 = b2_min + (b2_diff * yidx) / yidx_max; - r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max; - g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max; - b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max; - - dest = bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - even_odd_horiz = (i / bgscale) & 1; - even_odd = even_odd_vert ^ even_odd_horiz; - invert_column = - (even_odd_horiz && (bg[pat].type & 0x10)); - if (even_odd == 0) { /* gradient #1 */ - if (invert_column) { - *dest++ = r1_inv; - *dest++ = g1_inv; - *dest++ = b1_inv; - } else { - *dest++ = r1; - *dest++ = g1; - *dest++ = b1; - } - } else { /* gradient #2 */ - if ((invert_column && invert_gradient2) || - (!invert_column && !invert_gradient2)) - { - *dest++ = r2; /* not inverted or */ - *dest++ = g2; /* doubly inverted */ - *dest++ = b2; - } else { - *dest++ = r2_inv; - *dest++ = g2_inv; /* singly inverted */ - *dest++ = b2_inv; - } - } - } - } - -/*--------------------------------------------------------------------------- - Soft gradient-diamonds with scale = bgscale. Code contributed by Adam - M. Costello. - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 1) { - - hmax = (bgscale-1)/2; /* half the max weight of a color */ - max = 2*hmax; /* the max weight of a color */ - - r1 = rgb[bg[pat].rgb1_max].r; - g1 = rgb[bg[pat].rgb1_max].g; - b1 = rgb[bg[pat].rgb1_max].b; - r2 = rgb[bg[pat].rgb2_max].r; - g2 = rgb[bg[pat].rgb2_max].g; - b2 = rgb[bg[pat].rgb2_max].b; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = row % bgscale; - if (yidx > hmax) - yidx = bgscale-1 - yidx; - dest = bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - xidx = i % bgscale; - if (xidx > hmax) - xidx = bgscale-1 - xidx; - k = xidx + yidx; - *dest++ = (k*r1 + (max-k)*r2) / max; - *dest++ = (k*g1 + (max-k)*g2) / max; - *dest++ = (k*b1 + (max-k)*b2) / max; - } - } - -/*--------------------------------------------------------------------------- - Radial "starburst" with azimuthal sinusoids; [eventually number of sinu- - soids will equal bgscale?]. This one is slow but very cool. Code con- - tributed by Pieter S. van der Meulen (originally in Smalltalk). - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 2) { - uch ch; - int ii, x, y, hw, hh, grayspot; - double freq, rotate, saturate, gray, intensity; - double angle=0.0, aoffset=0.0, maxDist, dist; - double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t; - - fprintf(stderr, "%s: computing radial background...", - PROGNAME); - fflush(stderr); - - hh = rpng2_info.height / 2; - hw = rpng2_info.width / 2; - - /* variables for radial waves: - * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED] - * freq: number of color beams originating from the center - * grayspot: size of the graying center area (anti-alias) - * rotate: rotation of the beams as a function of radius - * saturate: saturation of beams' shape azimuthally - */ - angle = CLIP(angle, 0.0, 360.0); - grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw)); - freq = MAX((double)bg[pat].bg_freq, 0.0); - saturate = (double)bg[pat].bg_bsat * 0.1; - rotate = (double)bg[pat].bg_brot * 0.1; - gray = 0.0; - intensity = 0.0; - maxDist = (double)((hw*hw) + (hh*hh)); - - for (row = 0; row < rpng2_info.height; ++row) { - y = row - hh; - dest = bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - x = i - hw; - angle = (x == 0)? PI_2 : atan((double)y / (double)x); - gray = (double)MAX(ABS(y), ABS(x)) / grayspot; - gray = MIN(1.0, gray); - dist = (double)((x*x) + (y*y)) / maxDist; - intensity = cos((angle+(rotate*dist*PI)) * freq) * - gray * saturate; - intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5; - hue = (angle + PI) * INV_PI_360 + aoffset; - s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh)); - s = MIN(MAX(s,0.0), 1.0); - v = MIN(MAX(intensity,0.0), 1.0); - - if (s == 0.0) { - ch = (uch)(v * 255.0); - *dest++ = ch; - *dest++ = ch; - *dest++ = ch; - } else { - if ((hue < 0.0) || (hue >= 360.0)) - hue -= (((int)(hue / 360.0)) * 360.0); - hue /= 60.0; - ii = (int)hue; - f = hue - (double)ii; - p = (1.0 - s) * v; - q = (1.0 - (s * f)) * v; - t = (1.0 - (s * (1.0 - f))) * v; - if (ii == 0) { red = v; green = t; blue = p; } - else if (ii == 1) { red = q; green = v; blue = p; } - else if (ii == 2) { red = p; green = v; blue = t; } - else if (ii == 3) { red = p; green = q; blue = v; } - else if (ii == 4) { red = t; green = p; blue = v; } - else if (ii == 5) { red = v; green = p; blue = q; } - *dest++ = (uch)(red * 255.0); - *dest++ = (uch)(green * 255.0); - *dest++ = (uch)(blue * 255.0); - } - } - } - fprintf(stderr, "done.\n"); - fflush(stderr); - } - -/*--------------------------------------------------------------------------- - Blast background image to display buffer before beginning PNG decode; - calling function will handle invalidation and UpdateWindow() call. - ---------------------------------------------------------------------------*/ - - for (row = 0; row < rpng2_info.height; ++row) { - src = bg_data + row*bg_rowbytes; - dest = wimage_data + row*wimage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - r1 = *src++; - g1 = *src++; - b1 = *src++; - *dest++ = b1; - *dest++ = g1; /* note reverse order */ - *dest++ = r1; - } - } - - return 0; - -} /* end function rpng2_win_load_bg_image() */ - - - - - -static void rpng2_win_display_row(ulg row) -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *src, *src2=NULL, *dest; - uch r, g, b, a; - ulg i; - static int rows=0; - static ulg firstrow; - -/*--------------------------------------------------------------------------- - rows and firstrow simply track how many rows (and which ones) have not - yet been displayed; alternatively, we could call InvalidateRect() for - every row and not bother with the records-keeping. - ---------------------------------------------------------------------------*/ - - Trace((stderr, "beginning rpng2_win_display_row()\n")) - - if (rows == 0) - firstrow = row; /* first row not yet displayed */ - - ++rows; /* count of rows received but not yet displayed */ - -/*--------------------------------------------------------------------------- - Aside from the use of the rpng2_info struct and the lack of an outer - loop (over rows), this routine is identical to rpng_win_display_image() - in the non-progressive version of the program. - ---------------------------------------------------------------------------*/ - - src = rpng2_info.image_data + row*rpng2_info.rowbytes; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = wimage_data + row*wimage_rowbytes; - - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - *dest++ = b; - *dest++ = g; /* note reverse order */ - *dest++ = r; - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - *dest++ = b; - *dest++ = g; - *dest++ = r; - } else if (a == 0) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } else { - /* this macro (copied from png.h) composites the - * foreground and background values and puts the - * result into the first argument; there are no - * side effects with the first argument */ - alpha_composite(*dest++, b, a, bg_blue); - alpha_composite(*dest++, g, a, bg_green); - alpha_composite(*dest++, r, a, bg_red); - } - } - } - -/*--------------------------------------------------------------------------- - Display after every 16 rows or when on last row. (Region may include - previously displayed lines due to interlacing--i.e., not contiguous.) - ---------------------------------------------------------------------------*/ - - if ((rows & 0xf) == 0 || row == rpng2_info.height-1) { - RECT rect; - - rect.left = 0L; - rect.top = (LONG)firstrow; - rect.right = (LONG)rpng2_info.width; /* possibly off by one? */ - rect.bottom = (LONG)row + 1L; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - rows = 0; - } - -} /* end function rpng2_win_display_row() */ - - - - - -static void rpng2_win_finish_display() -{ - Trace((stderr, "beginning rpng2_win_finish_display()\n")) - - /* last row has already been displayed by rpng2_win_display_row(), so - * we have nothing to do here except set a flag and let the user know - * that the image is done */ - - rpng2_info.state = kDone; - printf( -#ifndef __CYGWIN__ - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n" -#else - "Done. Press mouse button 1 (within image window) to quit.\n" -#endif - ); - fflush(stdout); -} - - - - - -static void rpng2_win_cleanup() -{ - if (bg_image && bg_data) { - free(bg_data); - bg_data = NULL; - } - - if (rpng2_info.image_data) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - } - - if (rpng2_info.row_pointers) { - free(rpng2_info.row_pointers); - rpng2_info.row_pointers = NULL; - } - - if (dib) { - free(dib); - dib = NULL; - } -} - - - - - -LRESULT CALLBACK rpng2_win_wndproc(HWND hwnd, UINT iMsg, WPARAM wP, LPARAM lP) -{ - HDC hdc; - PAINTSTRUCT ps; - int rc; - - switch (iMsg) { - case WM_CREATE: - /* one-time processing here, if any */ - return 0; - - case WM_PAINT: - hdc = BeginPaint(hwnd, &ps); - rc = StretchDIBits(hdc, 0, 0, rpng2_info.width, rpng2_info.height, - 0, 0, rpng2_info.width, rpng2_info.height, - wimage_data, (BITMAPINFO *)bmih, - 0, SRCCOPY); - EndPaint(hwnd, &ps); - return 0; - - /* wait for the user to tell us when to quit */ - case WM_CHAR: - switch (wP) { /* only need one, so ignore repeat count */ - case 'q': - case 'Q': - case 0x1B: /* Esc key */ - PostQuitMessage(0); - } - return 0; - - case WM_LBUTTONDOWN: /* another way of quitting */ - case WM_DESTROY: - PostQuitMessage(0); - return 0; - } - - return DefWindowProc(hwnd, iMsg, wP, lP); -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng2-x.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng2-x.c deleted file mode 100644 index cf371014c8d..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/rpng2-x.c +++ /dev/null @@ -1,2135 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program rpng2-x.c - - This program decodes and displays PNG files progressively, as if it were - a web browser (though the front end is only set up to read from files). - It supports gamma correction, user-specified background colors, and user- - specified background patterns (for transparent images). This version is - for the X Window System (tested by the author under Unix and by Martin - Zinser under OpenVMS; may work under OS/2 with a little tweaking). - - Thanks to Adam Costello and Pieter S. van der Meulen for the "diamond" - and "radial waves" patterns, respectively. - - to do (someday, maybe): - - fix expose/redraw code: don't draw entire row if only part exposed - - 8-bit (colormapped) X support - - finish resizable checkerboard-gradient (sizes 4-128?) - - use %.1023s to simplify truncation of title-bar string? - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: modified to allow abbreviated options; fixed char/uchar mismatch - - 1.10: added support for non-default visuals; fixed X pixel-conversion - - 1.11: added -usleep option for demos; fixed command-line parsing bug - - 1.12: added -pause option for demos and testing - - 1.20: added runtime MMX-enabling/disabling and new -mmx* options - - 1.21: fixed some small X memory leaks (thanks to François Petitjean) - - 1.22: fixed XFreeGC() crash bug (thanks to Patrick Welche) - - 1.23: added -bgpat 0 mode (std white/gray checkerboard, 8x8 squares) - - 1.30: added -loop option for -bgpat (ifdef FEATURE_LOOP); fixed bpp = - 24; added support for X resources (thanks to Gerhard Niklasch) - - 1.31: added code to skip unused chunks (thanks to Glenn Randers-Pehrson) - - 1.32: added AMD64/EM64T support (__x86_64__); added basic expose/redraw - handling - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed 64-bit typo in readpng2.c; fixed -pause usage description - - 2.02: fixed improper display of usage screen on PNG error(s); fixed - unexpected-EOF and file-read-error cases; fixed Trace() cut-and- - paste bugs - - 2.03: deleted runtime MMX-enabling/disabling and obsolete -mmx* options - - 2.04: Added "void(foo);" statements to quiet pedantic compiler warnings - about unused variables (GR-P) - - TO DO: - use nanosleep() instead of usleep(), which is obsolete/deprecated. - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng2-x" -#define LONGNAME "Progressive PNG Viewer for X" -#define VERSION "2.04 of 15 June 2014" -#define RESNAME "rpng2" /* our X resource application name */ -#define RESCLASS "Rpng" /* our X resource class name */ - -#include <stdio.h> -#include <stdlib.h> -#include <ctype.h> -#include <string.h> -#include <setjmp.h> /* for jmpbuf declaration in readpng2.h */ -#include <time.h> -#include <math.h> /* only for PvdM background code */ -#include <X11/Xlib.h> -#include <X11/Xutil.h> -#include <X11/Xos.h> -#include <X11/keysym.h> /* defines XK_* macros */ - -#if _POSIX_C_SOURCE >= 199309L /* have nanosleep() */ -# undef usleep -# define usleep(usec) { \ - struct timespec ts; \ - ts.tv_nsec = (usec) * 1000; \ - nanosleep(&ts, NULL); } -# endif - -#ifndef usleep /* have neither nanosleep() nor usleep() */ -# define usleep(x) sleep(((x)+499999)/1000000) -#endif - -#ifdef VMS -# include <unistd.h> -#endif - -/* all for PvdM background code: */ -#ifndef PI -# define PI 3.141592653589793238 -#endif -#define PI_2 (PI*0.5) -#define INV_PI_360 (360.0 / PI) -#define MAX(a,b) (a>b?a:b) -#define MIN(a,b) (a<b?a:b) -#define CLIP(a,min,max) MAX(min,MIN((a),max)) -#define ABS(a) ((a)<0?-(a):(a)) -#define CLIP8P(c) MAX(0,(MIN((c),255))) /* 8-bit pos. integer (uch) */ -#define ROUNDF(f) ((int)(f + 0.5)) - -#define QUIT(e,k) ((e.type == ButtonPress && e.xbutton.button == Button1) || \ - (e.type == KeyPress && /* v--- or 1 for shifted keys */ \ - ((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape))) - -#define NO_24BIT_MASKS /* undef case not fully written--only for redisplay() */ - -#define rgb1_max bg_freq -#define rgb1_min bg_gray -#define rgb2_max bg_bsat -#define rgb2_min bg_brot - -/* #define DEBUG */ /* this enables the Trace() macros */ - -#include "readpng2.h" /* typedefs, common macros, readpng2 prototypes */ - - -/* could just include png.h, but this macro is the only thing we need - * (name and typedefs changed to local versions); note that side effects - * only happen with alpha (which could easily be avoided with - * "ush acopy = (alpha);") */ - -#define alpha_composite(composite, fg, alpha, bg) { \ - ush temp = ((ush)(fg)*(ush)(alpha) + \ - (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \ - (composite) = (uch)((temp + (temp >> 8)) >> 8); \ -} - - -#define INBUFSIZE 4096 /* with pseudo-timing on (1 sec delay/block), this - * block size corresponds roughly to a download - * speed 10% faster than theoretical 33.6K maximum - * (assuming 8 data bits, 1 stop bit and no other - * overhead) */ - -/* local prototypes */ -static void rpng2_x_init (void); -static int rpng2_x_create_window (void); -static int rpng2_x_load_bg_image (void); -static void rpng2_x_display_row (ulg row); -static void rpng2_x_finish_display (void); -static void rpng2_x_redisplay_image (ulg startcol, ulg startrow, - ulg width, ulg height); -#ifdef FEATURE_LOOP -static void rpng2_x_reload_bg_image (void); -static int is_number (char *p); -#endif -static void rpng2_x_cleanup (void); -static int rpng2_x_msb (ulg u32val); - - -static char titlebar[1024], *window_name = titlebar; -static char *appname = LONGNAME; -static char *icon_name = PROGNAME; -static char *res_name = RESNAME; -static char *res_class = RESCLASS; -static char *filename; -static FILE *infile; - -static mainprog_info rpng2_info; - -static uch inbuf[INBUFSIZE]; -static int incount; - -static int pat = 6; /* must be less than num_bgpat */ -static int bg_image = 0; -static int bgscale, bgscale_default = 16; -static ulg bg_rowbytes; -static uch *bg_data; - -int pause_after_pass = FALSE; -int demo_timing = FALSE; -ulg usleep_duration = 0L; - -static struct rgb_color { - uch r, g, b; -} rgb[] = { - { 0, 0, 0}, /* 0: black */ - {255, 255, 255}, /* 1: white */ - {173, 132, 57}, /* 2: tan */ - { 64, 132, 0}, /* 3: medium green */ - {189, 117, 1}, /* 4: gold */ - {253, 249, 1}, /* 5: yellow */ - { 0, 0, 255}, /* 6: blue */ - { 0, 0, 120}, /* 7: medium blue */ - {255, 0, 255}, /* 8: magenta */ - { 64, 0, 64}, /* 9: dark magenta */ - {255, 0, 0}, /* 10: red */ - { 64, 0, 0}, /* 11: dark red */ - {255, 127, 0}, /* 12: orange */ - {192, 96, 0}, /* 13: darker orange */ - { 24, 60, 0}, /* 14: dark green-yellow */ - { 85, 125, 200}, /* 15: ice blue */ - {192, 192, 192} /* 16: Netscape/Mosaic gray */ -}; -/* not used for now, but should be for error-checking: -static int num_rgb = sizeof(rgb) / sizeof(struct rgb_color); - */ - -/* - This whole struct is a fairly cheesy way to keep the number of - command-line options to a minimum. The radial-waves background - type is a particularly poor fit to the integer elements of the - struct...but a few macros and a little fixed-point math will do - wonders for ya. - - type bits: - F E D C B A 9 8 7 6 5 4 3 2 1 0 - | | | | | - | | +-+-+-- 0 = sharp-edged checkerboard - | | 1 = soft diamonds - | | 2 = radial waves - | | 3-7 = undefined - | +-- gradient #2 inverted? - +-- alternating columns inverted? - */ -static struct background_pattern { - ush type; - int rgb1_max, rgb1_min; /* or bg_freq, bg_gray */ - int rgb2_max, rgb2_min; /* or bg_bsat, bg_brot (both scaled by 10)*/ -} bg[] = { - {0, 1,1, 16,16}, /* checkered: white vs. light gray (basic) */ - {0+8, 2,0, 1,15}, /* checkered: tan/black vs. white/ice blue */ - {0+24, 2,0, 1,0}, /* checkered: tan/black vs. white/black */ - {0+8, 4,5, 0,2}, /* checkered: gold/yellow vs. black/tan */ - {0+8, 4,5, 0,6}, /* checkered: gold/yellow vs. black/blue */ - {0, 7,0, 8,9}, /* checkered: deep blue/black vs. magenta */ - {0+8, 13,0, 5,14}, /* checkered: orange/black vs. yellow */ - {0+8, 12,0, 10,11}, /* checkered: orange/black vs. red */ - {1, 7,0, 8,0}, /* diamonds: deep blue/black vs. magenta */ - {1, 12,0, 11,0}, /* diamonds: orange vs. dark red */ - {1, 10,0, 7,0}, /* diamonds: red vs. medium blue */ - {1, 4,0, 5,0}, /* diamonds: gold vs. yellow */ - {1, 3,0, 0,0}, /* diamonds: medium green vs. black */ - {2, 16, 100, 20, 0}, /* radial: ~hard radial color-beams */ - {2, 18, 100, 10, 2}, /* radial: soft, curved radial color-beams */ - {2, 16, 256, 100, 250}, /* radial: very tight spiral */ - {2, 10000, 256, 11, 0} /* radial: dipole-moire' (almost fractal) */ -}; -static int num_bgpat = sizeof(bg) / sizeof(struct background_pattern); - - -/* X-specific variables */ -static char *displayname; -static XImage *ximage; -static Display *display; -static int depth; -static Visual *visual; -static XVisualInfo *visual_list; -static int RShift, GShift, BShift; -static ulg RMask, GMask, BMask; -static Window window; -static GC gc; -static Colormap colormap; - -static int have_nondefault_visual = FALSE; -static int have_colormap = FALSE; -static int have_window = FALSE; -static int have_gc = FALSE; - - - - -int main(int argc, char **argv) -{ -#ifdef sgi - char tmpline[80]; -#endif - char *p, *bgstr = NULL; - int rc, alen, flen; - int error = 0; - int timing = FALSE; - int have_bg = FALSE; -#ifdef FEATURE_LOOP - int loop = FALSE; - long loop_interval = -1; /* seconds (100,000 max) */ -#endif - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - XEvent e; - KeySym k; - - - /* First initialize a few things, just to be sure--memset takes care of - * default background color (black), booleans (FALSE), pointers (NULL), - * etc. */ - - displayname = (char *)NULL; - filename = (char *)NULL; - memset(&rpng2_info, 0, sizeof(mainprog_info)); - - - /* Set the default value for our display-system exponent, i.e., the - * product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. */ - -#if defined(NeXT) - /* third-party utilities can modify the default LUT exponent */ - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to - * get the "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - rpng2_info.display_exponent = atof(p); - else - rpng2_info.display_exponent = default_display_exponent; - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-display", 2)) { - if (!*++argv) - ++error; - else - displayname = *argv; - } else if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - rpng2_info.display_exponent = atof(*argv); - if (rpng2_info.display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 4)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else { - have_bg = TRUE; - bg_image = FALSE; - } - } - } else if (!strncmp(*argv, "-bgpat", 4)) { - if (!*++argv) - ++error; - else { - pat = atoi(*argv); - if (pat >= 0 && pat < num_bgpat) { - bg_image = TRUE; - have_bg = FALSE; - } else - ++error; - } - } else if (!strncmp(*argv, "-usleep", 2)) { - if (!*++argv) - ++error; - else { - usleep_duration = (ulg)atol(*argv); - demo_timing = TRUE; - } - } else if (!strncmp(*argv, "-pause", 2)) { - pause_after_pass = TRUE; - } else if (!strncmp(*argv, "-timing", 2)) { - timing = TRUE; -#ifdef FEATURE_LOOP - } else if (!strncmp(*argv, "-loop", 2)) { - loop = TRUE; - if (!argv[1] || !is_number(argv[1])) - loop_interval = 2; - else { - ++argv; - loop_interval = atol(*argv); - if (loop_interval < 0) - loop_interval = 2; - else if (loop_interval > 100000) /* bit more than one day */ - loop_interval = 100000; - } -#endif - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { - fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); - readpng2_version_info(); - fprintf(stderr, "\n" - "Usage: "); - fprintf(stderr, - "%s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n" - " %*s [-usleep dur | -timing] [-pause]\n", - PROGNAME, (int)strlen(PROGNAME), " "); - fprintf(stderr, -#ifdef FEATURE_LOOP - " [-loop [sec]]" -#endif - " file.png\n\n"); - fprintf(stderr, - " xdpy\tname of the target X display (e.g., ``hostname:0'')\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" - "\t\t to the product of the lookup-table exponent (varies)\n", - default_display_exponent); - fprintf(stderr, - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images; overrides -bgpat\n" - " pat \tdesired background pattern number (0-%d); used with\n" - "\t\t transparent images; overrides -bgcolor\n", - num_bgpat-1); -#ifdef FEATURE_LOOP - fprintf(stderr, - " -loop\tloops through background images after initial display\n" - "\t\t is complete (depends on -bgpat)\n" - " sec \tseconds to display each background image (default = 2)\n"); -#endif - fprintf(stderr, - " dur \tduration in microseconds to wait after displaying each\n" - "\t\t row (for demo purposes)\n" - " -timing\tenables delay for every block read, to simulate modem\n" - "\t\t download of image (~36 Kbps)\n" - " -pause\tpauses after displaying each pass until mouse clicked\n" - "\nPress Q, Esc or mouse button 1 (within image window, after image\n" - "is displayed) to quit.\n"); - exit(1); - } - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - incount = fread(inbuf, 1, INBUFSIZE, infile); - if (incount < 8 || !readpng2_check_sig(inbuf, 8)) { - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - ++error; - } else if ((rc = readpng2_init(&rpng2_info)) != 0) { - switch (rc) { - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng2_init() error\n"); - break; - } - ++error; - } else { - Trace((stderr, "about to call XOpenDisplay()\n")) - display = XOpenDisplay(displayname); - if (!display) { - readpng2_cleanup(&rpng2_info); - fprintf(stderr, PROGNAME ": can't open X display [%s]\n", - displayname? displayname : "default"); - ++error; - } - } - if (error) - fclose(infile); - } - - - if (error) { - fprintf(stderr, PROGNAME ": aborting.\n"); - exit(2); - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* set some final rpng2_info variables before entering main data loop */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - rpng2_info.bg_red = (uch)r; - rpng2_info.bg_green = (uch)g; - rpng2_info.bg_blue = (uch)b; - } else - rpng2_info.need_bgcolor = TRUE; - - rpng2_info.state = kPreInit; - rpng2_info.mainprog_init = rpng2_x_init; - rpng2_info.mainprog_display_row = rpng2_x_display_row; - rpng2_info.mainprog_finish_display = rpng2_x_finish_display; - - - /* OK, this is the fun part: call readpng2_decode_data() at the start of - * the loop to deal with our first buffer of data (read in above to verify - * that the file is a PNG image), then loop through the file and continue - * calling the same routine to handle each chunk of data. It in turn - * passes the data to libpng, which will invoke one or more of our call- - * backs as decoded data become available. We optionally call sleep() for - * one second per iteration to simulate downloading the image via an analog - * modem. */ - - for (;;) { - Trace((stderr, "about to call readpng2_decode_data()\n")) - if (readpng2_decode_data(&rpng2_info, inbuf, incount)) - ++error; - Trace((stderr, "done with readpng2_decode_data()\n")) - - if (error || incount != INBUFSIZE || rpng2_info.state == kDone) { - if (rpng2_info.state == kDone) { - Trace((stderr, "done decoding PNG image\n")) - } else if (ferror(infile)) { - fprintf(stderr, PROGNAME - ": error while reading PNG image file\n"); - exit(3); - } else if (feof(infile)) { - fprintf(stderr, PROGNAME ": end of file reached " - "(unexpectedly) while reading PNG image file\n"); - exit(3); - } else /* if (error) */ { - /* will print error message below */ - } - break; - } - - if (timing) - sleep(1); - - incount = fread(inbuf, 1, INBUFSIZE, infile); - } - - - /* clean up PNG stuff and report any decoding errors */ - - fclose(infile); - Trace((stderr, "about to call readpng2_cleanup()\n")) - readpng2_cleanup(&rpng2_info); - - if (error) { - fprintf(stderr, PROGNAME ": libpng error while decoding PNG image\n"); - exit(3); - } - - -#ifdef FEATURE_LOOP - - if (loop && bg_image) { - Trace((stderr, "entering -loop loop (FEATURE_LOOP)\n")) - for (;;) { - int i, use_sleep; - struct timeval now, then; - - /* get current time and add loop_interval to get target time */ - if (gettimeofday(&then, NULL) == 0) { - then.tv_sec += loop_interval; - use_sleep = FALSE; - } else - use_sleep = TRUE; - - /* do quick check for a quit event but don't wait for it */ - /* GRR BUG: should also check for Expose events and redraw... */ - if (XCheckMaskEvent(display, KeyPressMask | ButtonPressMask, &e)) - if (QUIT(e,k)) - break; - - /* generate next background image */ - if (++pat >= num_bgpat) - pat = 0; - rpng2_x_reload_bg_image(); - - /* wait for timeout, using whatever means are available */ - if (use_sleep || gettimeofday(&now, NULL) != 0) { - for (i = loop_interval; i > 0; --i) { - sleep(1); - /* GRR BUG: also need to check for Expose (and redraw!) */ - if (XCheckMaskEvent(display, KeyPressMask | ButtonPressMask, - &e) && QUIT(e,k)) - break; - } - } else { - /* Y2038 BUG! */ - if (now.tv_sec < then.tv_sec || - (now.tv_sec == then.tv_sec && now.tv_usec < then.tv_usec)) - { - int quit = FALSE; - long seconds_to_go = then.tv_sec - now.tv_sec; - long usleep_usec; - - /* basically chew up most of remaining loop-interval with - * calls to sleep(1) interleaved with checks for quit - * events, but also recalc time-to-go periodically; when - * done, clean up any remaining time with usleep() call - * (could also use SIGALRM, but signals are a pain...) */ - while (seconds_to_go-- > 1) { - int seconds_done = 0; - - for (i = seconds_to_go; i > 0 && !quit; --i) { - sleep(1); - /* GRR BUG: need to check for Expose and redraw */ - if (XCheckMaskEvent(display, KeyPressMask | - ButtonPressMask, &e) && QUIT(e,k)) - quit = TRUE; - if (++seconds_done > 1000) - break; /* time to redo seconds_to_go meas. */ - } - if (quit) - break; - - /* OK, more than 1000 seconds since last check: - * correct the time-to-go measurement for drift */ - if (gettimeofday(&now, NULL) == 0) { - if (now.tv_sec >= then.tv_sec) - break; - seconds_to_go = then.tv_sec - now.tv_sec; - } else - ++seconds_to_go; /* restore what we subtracted */ - } - if (quit) - break; /* breaks outer do-loop, skips redisplay */ - - /* since difference between "now" and "then" is already - * eaten up to within a couple of seconds, don't need to - * worry about overflow--but might have overshot (neg.) */ - if (gettimeofday(&now, NULL) == 0) { - usleep_usec = 1000000L*(then.tv_sec - now.tv_sec) + - then.tv_usec - now.tv_usec; - if (usleep_usec > 0) - usleep((ulg)usleep_usec); - } - } - } - - /* composite image against new background and display (note that - * we do not take into account the time spent doing this...) */ - rpng2_x_redisplay_image (0, 0, rpng2_info.width, rpng2_info.height); - } - - } else /* FALL THROUGH and do the normal thing */ - -#endif /* FEATURE_LOOP */ - - /* wait for the user to tell us when to quit */ - - if (rpng2_info.state >= kWindowInit) { - Trace((stderr, "entering final wait-for-quit-event loop\n")) - do { - XNextEvent(display, &e); - if (e.type == Expose) { - XExposeEvent *ex = (XExposeEvent *)&e; - rpng2_x_redisplay_image (ex->x, ex->y, ex->width, ex->height); - } - } while (!QUIT(e,k)); - } else { - fprintf(stderr, PROGNAME ": init callback never called: probable " - "libpng error while decoding PNG metadata\n"); - exit(4); - } - - - /* we're done: clean up all image and X resources and go away */ - - Trace((stderr, "about to call rpng2_x_cleanup()\n")) - rpng2_x_cleanup(); - - (void)argc; /* Unused */ - - return 0; -} - - - - - -/* this function is called by readpng2_info_callback() in readpng2.c, which - * in turn is called by libpng after all of the pre-IDAT chunks have been - * read and processed--i.e., we now have enough info to finish initializing */ - -static void rpng2_x_init(void) -{ - ulg i; - ulg rowbytes = rpng2_info.rowbytes; - - Trace((stderr, "beginning rpng2_x_init()\n")) - Trace((stderr, " rowbytes = %d\n", rpng2_info.rowbytes)) - Trace((stderr, " width = %ld\n", rpng2_info.width)) - Trace((stderr, " height = %ld\n", rpng2_info.height)) - - rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height); - if (!rpng2_info.image_data) { - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.row_pointers = (uch **)malloc(rpng2_info.height * sizeof(uch *)); - if (!rpng2_info.row_pointers) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - readpng2_cleanup(&rpng2_info); - return; - } - - for (i = 0; i < rpng2_info.height; ++i) - rpng2_info.row_pointers[i] = rpng2_info.image_data + i*rowbytes; - - - /* do the basic X initialization stuff, make the window, and fill it with - * the user-specified, file-specified or default background color or - * pattern */ - - if (rpng2_x_create_window()) { - - /* GRR TEMPORARY HACK: this is fundamentally no different from cases - * above; libpng should call our error handler to longjmp() back to us - * when png_ptr goes away. If we/it segfault instead, seems like a - * libpng bug... */ - - /* we're here via libpng callback, so if window fails, clean and bail */ - readpng2_cleanup(&rpng2_info); - rpng2_x_cleanup(); - exit(2); - } - - rpng2_info.state = kWindowInit; -} - - - - - -static int rpng2_x_create_window(void) -{ - ulg bg_red = rpng2_info.bg_red; - ulg bg_green = rpng2_info.bg_green; - ulg bg_blue = rpng2_info.bg_blue; - ulg bg_pixel = 0L; - ulg attrmask; - int need_colormap = FALSE; - int screen, pad; - uch *xdata; - Window root; - XEvent e; - XGCValues gcvalues; - XSetWindowAttributes attr; - XTextProperty windowName, *pWindowName = &windowName; - XTextProperty iconName, *pIconName = &iconName; - XVisualInfo visual_info; - XSizeHints *size_hints; - XWMHints *wm_hints; - XClassHint *class_hints; - - - Trace((stderr, "beginning rpng2_x_create_window()\n")) - - screen = DefaultScreen(display); - depth = DisplayPlanes(display, screen); - root = RootWindow(display, screen); - -#ifdef DEBUG - XSynchronize(display, True); -#endif - - if (depth != 16 && depth != 24 && depth != 32) { - int visuals_matched = 0; - - Trace((stderr, "default depth is %d: checking other visuals\n", - depth)) - - /* 24-bit first */ - visual_info.screen = screen; - visual_info.depth = 24; - visual_list = XGetVisualInfo(display, - VisualScreenMask | VisualDepthMask, &visual_info, &visuals_matched); - if (visuals_matched == 0) { -/* GRR: add 15-, 16- and 32-bit TrueColor visuals (also DirectColor?) */ - fprintf(stderr, "default screen depth %d not supported, and no" - " 24-bit visuals found\n", depth); - return 2; - } - Trace((stderr, "XGetVisualInfo() returned %d 24-bit visuals\n", - visuals_matched)) - visual = visual_list[0].visual; - depth = visual_list[0].depth; -/* - colormap_size = visual_list[0].colormap_size; - visual_class = visual->class; - visualID = XVisualIDFromVisual(visual); - */ - have_nondefault_visual = TRUE; - need_colormap = TRUE; - } else { - XMatchVisualInfo(display, screen, depth, TrueColor, &visual_info); - visual = visual_info.visual; - } - - RMask = visual->red_mask; - GMask = visual->green_mask; - BMask = visual->blue_mask; - -/* GRR: add/check 8-bit support */ - if (depth == 8 || need_colormap) { - colormap = XCreateColormap(display, root, visual, AllocNone); - if (!colormap) { - fprintf(stderr, "XCreateColormap() failed\n"); - return 2; - } - have_colormap = TRUE; - if (depth == 8) - bg_image = FALSE; /* gradient just wastes palette entries */ - } - if (depth == 15 || depth == 16) { - RShift = 15 - rpng2_x_msb(RMask); /* these are right-shifts */ - GShift = 15 - rpng2_x_msb(GMask); - BShift = 15 - rpng2_x_msb(BMask); - } else if (depth > 16) { - RShift = rpng2_x_msb(RMask) - 7; /* these are left-shifts */ - GShift = rpng2_x_msb(GMask) - 7; - BShift = rpng2_x_msb(BMask) - 7; - } - if (depth >= 15 && (RShift < 0 || GShift < 0 || BShift < 0)) { - fprintf(stderr, "rpng2 internal logic error: negative X shift(s)!\n"); - return 2; - } - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - attr.backing_store = Always; - attr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask; - attrmask = CWBackingStore | CWEventMask; - if (have_nondefault_visual) { - attr.colormap = colormap; - attr.background_pixel = 0; - attr.border_pixel = 1; - attrmask |= CWColormap | CWBackPixel | CWBorderPixel; - } - - window = XCreateWindow(display, root, 0, 0, rpng2_info.width, - rpng2_info.height, 0, depth, InputOutput, visual, attrmask, &attr); - - if (window == None) { - fprintf(stderr, "XCreateWindow() failed\n"); - return 2; - } else - have_window = TRUE; - - if (depth == 8) - XSetWindowColormap(display, window, colormap); - - if (!XStringListToTextProperty(&window_name, 1, pWindowName)) - pWindowName = NULL; - if (!XStringListToTextProperty(&icon_name, 1, pIconName)) - pIconName = NULL; - - /* OK if either hints allocation fails; XSetWMProperties() allows NULLs */ - - if ((size_hints = XAllocSizeHints()) != NULL) { - /* window will not be resizable */ - size_hints->flags = PMinSize | PMaxSize; - size_hints->min_width = size_hints->max_width = (int)rpng2_info.width; - size_hints->min_height = size_hints->max_height = - (int)rpng2_info.height; - } - - if ((wm_hints = XAllocWMHints()) != NULL) { - wm_hints->initial_state = NormalState; - wm_hints->input = True; - /* wm_hints->icon_pixmap = icon_pixmap; */ - wm_hints->flags = StateHint | InputHint /* | IconPixmapHint */ ; - } - - if ((class_hints = XAllocClassHint()) != NULL) { - class_hints->res_name = res_name; - class_hints->res_class = res_class; - } - - XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0, - size_hints, wm_hints, class_hints); - - /* various properties and hints no longer needed; free memory */ - if (pWindowName) - XFree(pWindowName->value); - if (pIconName) - XFree(pIconName->value); - if (size_hints) - XFree(size_hints); - if (wm_hints) - XFree(wm_hints); - if (class_hints) - XFree(class_hints); - - XMapWindow(display, window); - - gc = XCreateGC(display, window, 0, &gcvalues); - have_gc = TRUE; - -/*--------------------------------------------------------------------------- - Allocate memory for the X- and display-specific version of the image. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - xdata = (uch *)malloc(4*rpng2_info.width*rpng2_info.height); - pad = 32; - } else if (depth == 16) { - xdata = (uch *)malloc(2*rpng2_info.width*rpng2_info.height); - pad = 16; - } else /* depth == 8 */ { - xdata = (uch *)malloc(rpng2_info.width*rpng2_info.height); - pad = 8; - } - - if (!xdata) { - fprintf(stderr, PROGNAME ": unable to allocate image memory\n"); - return 4; - } - - ximage = XCreateImage(display, visual, depth, ZPixmap, 0, - (char *)xdata, rpng2_info.width, rpng2_info.height, pad, 0); - - if (!ximage) { - fprintf(stderr, PROGNAME ": XCreateImage() failed\n"); - free(xdata); - return 3; - } - - /* to avoid testing the byte order every pixel (or doubling the size of - * the drawing routine with a giant if-test), we arbitrarily set the byte - * order to MSBFirst and let Xlib worry about inverting things on little- - * endian machines (e.g., Linux/x86, old VAXen, etc.)--this is not the - * most efficient approach (the giant if-test would be better), but in - * the interest of clarity, we'll take the easy way out... */ - - ximage->byte_order = MSBFirst; - -/*--------------------------------------------------------------------------- - Fill window with the specified background color (default is black) or - faked "background image" (but latter is disabled if 8-bit; gradients - just waste palette entries). - ---------------------------------------------------------------------------*/ - - if (bg_image) - rpng2_x_load_bg_image(); /* resets bg_image if fails */ - - if (!bg_image) { - if (depth == 24 || depth == 32) { - bg_pixel = (bg_red << RShift) | - (bg_green << GShift) | - (bg_blue << BShift); - } else if (depth == 16) { - bg_pixel = (((bg_red << 8) >> RShift) & RMask) | - (((bg_green << 8) >> GShift) & GMask) | - (((bg_blue << 8) >> BShift) & BMask); - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - XSetForeground(display, gc, bg_pixel); - XFillRectangle(display, window, gc, 0, 0, rpng2_info.width, - rpng2_info.height); - } - -/*--------------------------------------------------------------------------- - Wait for first Expose event to do any drawing, then flush and return. - ---------------------------------------------------------------------------*/ - - do - XNextEvent(display, &e); - while (e.type != Expose || e.xexpose.count); - - XFlush(display); - - return 0; - -} /* end function rpng2_x_create_window() */ - - - - - -static int rpng2_x_load_bg_image(void) -{ - uch *src; - char *dest; - uch r1, r2, g1, g2, b1, b2; - uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv; - int k, hmax, max; - int xidx, yidx, yidx_max; - int even_odd_vert, even_odd_horiz, even_odd; - int invert_gradient2 = (bg[pat].type & 0x08); - int invert_column; - int ximage_rowbytes = ximage->bytes_per_line; - ulg i, row; - ulg pixel; - -/*--------------------------------------------------------------------------- - Allocate buffer for fake background image to be used with transparent - images; if this fails, revert to plain background color. - ---------------------------------------------------------------------------*/ - - bg_rowbytes = 3 * rpng2_info.width; - bg_data = (uch *)malloc(bg_rowbytes * rpng2_info.height); - if (!bg_data) { - fprintf(stderr, PROGNAME - ": unable to allocate memory for background image\n"); - bg_image = 0; - return 1; - } - - bgscale = (pat == 0)? 8 : bgscale_default; - yidx_max = bgscale - 1; - -/*--------------------------------------------------------------------------- - Vertical gradients (ramps) in NxN squares, alternating direction and - colors (N == bgscale). - ---------------------------------------------------------------------------*/ - - if ((bg[pat].type & 0x07) == 0) { - uch r1_min = rgb[bg[pat].rgb1_min].r; - uch g1_min = rgb[bg[pat].rgb1_min].g; - uch b1_min = rgb[bg[pat].rgb1_min].b; - uch r2_min = rgb[bg[pat].rgb2_min].r; - uch g2_min = rgb[bg[pat].rgb2_min].g; - uch b2_min = rgb[bg[pat].rgb2_min].b; - int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min; - int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min; - int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min; - int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min; - int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min; - int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - even_odd_vert = (int)((row / bgscale) & 1); - - r1 = r1_min + (r1_diff * yidx) / yidx_max; - g1 = g1_min + (g1_diff * yidx) / yidx_max; - b1 = b1_min + (b1_diff * yidx) / yidx_max; - r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max; - g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max; - b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max; - - r2 = r2_min + (r2_diff * yidx) / yidx_max; - g2 = g2_min + (g2_diff * yidx) / yidx_max; - b2 = b2_min + (b2_diff * yidx) / yidx_max; - r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max; - g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max; - b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max; - - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - even_odd_horiz = (int)((i / bgscale) & 1); - even_odd = even_odd_vert ^ even_odd_horiz; - invert_column = - (even_odd_horiz && (bg[pat].type & 0x10)); - if (even_odd == 0) { /* gradient #1 */ - if (invert_column) { - *dest++ = r1_inv; - *dest++ = g1_inv; - *dest++ = b1_inv; - } else { - *dest++ = r1; - *dest++ = g1; - *dest++ = b1; - } - } else { /* gradient #2 */ - if ((invert_column && invert_gradient2) || - (!invert_column && !invert_gradient2)) - { - *dest++ = r2; /* not inverted or */ - *dest++ = g2; /* doubly inverted */ - *dest++ = b2; - } else { - *dest++ = r2_inv; - *dest++ = g2_inv; /* singly inverted */ - *dest++ = b2_inv; - } - } - } - } - -/*--------------------------------------------------------------------------- - Soft gradient-diamonds with scale = bgscale. Code contributed by Adam - M. Costello. - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 1) { - - hmax = (bgscale-1)/2; /* half the max weight of a color */ - max = 2*hmax; /* the max weight of a color */ - - r1 = rgb[bg[pat].rgb1_max].r; - g1 = rgb[bg[pat].rgb1_max].g; - b1 = rgb[bg[pat].rgb1_max].b; - r2 = rgb[bg[pat].rgb2_max].r; - g2 = rgb[bg[pat].rgb2_max].g; - b2 = rgb[bg[pat].rgb2_max].b; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - if (yidx > hmax) - yidx = bgscale-1 - yidx; - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - xidx = (int)(i % bgscale); - if (xidx > hmax) - xidx = bgscale-1 - xidx; - k = xidx + yidx; - *dest++ = (k*r1 + (max-k)*r2) / max; - *dest++ = (k*g1 + (max-k)*g2) / max; - *dest++ = (k*b1 + (max-k)*b2) / max; - } - } - -/*--------------------------------------------------------------------------- - Radial "starburst" with azimuthal sinusoids; [eventually number of sinu- - soids will equal bgscale?]. This one is slow but very cool. Code con- - tributed by Pieter S. van der Meulen (originally in Smalltalk). - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 2) { - uch ch; - int ii, x, y, hw, hh, grayspot; - double freq, rotate, saturate, gray, intensity; - double angle=0.0, aoffset=0.0, maxDist, dist; - double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t; - - fprintf(stderr, "%s: computing radial background...", - PROGNAME); - fflush(stderr); - - hh = (int)(rpng2_info.height / 2); - hw = (int)(rpng2_info.width / 2); - - /* variables for radial waves: - * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED] - * freq: number of color beams originating from the center - * grayspot: size of the graying center area (anti-alias) - * rotate: rotation of the beams as a function of radius - * saturate: saturation of beams' shape azimuthally - */ - angle = CLIP(angle, 0.0, 360.0); - grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw)); - freq = MAX((double)bg[pat].bg_freq, 0.0); - saturate = (double)bg[pat].bg_bsat * 0.1; - rotate = (double)bg[pat].bg_brot * 0.1; - gray = 0.0; - intensity = 0.0; - maxDist = (double)((hw*hw) + (hh*hh)); - - for (row = 0; row < rpng2_info.height; ++row) { - y = (int)(row - hh); - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - x = (int)(i - hw); - angle = (x == 0)? PI_2 : atan((double)y / (double)x); - gray = (double)MAX(ABS(y), ABS(x)) / grayspot; - gray = MIN(1.0, gray); - dist = (double)((x*x) + (y*y)) / maxDist; - intensity = cos((angle+(rotate*dist*PI)) * freq) * - gray * saturate; - intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5; - hue = (angle + PI) * INV_PI_360 + aoffset; - s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh)); - s = MIN(MAX(s,0.0), 1.0); - v = MIN(MAX(intensity,0.0), 1.0); - - if (s == 0.0) { - ch = (uch)(v * 255.0); - *dest++ = ch; - *dest++ = ch; - *dest++ = ch; - } else { - if ((hue < 0.0) || (hue >= 360.0)) - hue -= (((int)(hue / 360.0)) * 360.0); - hue /= 60.0; - ii = (int)hue; - f = hue - (double)ii; - p = (1.0 - s) * v; - q = (1.0 - (s * f)) * v; - t = (1.0 - (s * (1.0 - f))) * v; - if (ii == 0) { red = v; green = t; blue = p; } - else if (ii == 1) { red = q; green = v; blue = p; } - else if (ii == 2) { red = p; green = v; blue = t; } - else if (ii == 3) { red = p; green = q; blue = v; } - else if (ii == 4) { red = t; green = p; blue = v; } - else if (ii == 5) { red = v; green = p; blue = q; } - *dest++ = (uch)(red * 255.0); - *dest++ = (uch)(green * 255.0); - *dest++ = (uch)(blue * 255.0); - } - } - } - fprintf(stderr, "done.\n"); - fflush(stderr); - } - -/*--------------------------------------------------------------------------- - Blast background image to display buffer before beginning PNG decode. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - int bpp = ximage->bits_per_pixel; - - for (row = 0; row < rpng2_info.height; ++row) { - src = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (bpp == 32) { /* slightly optimized version */ - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else { - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - /* GRR BUG? this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - } - - } else if (depth == 16) { - ush red, green, blue; - - for (row = 0; row < rpng2_info.height; ++row) { - src = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - red = ((ush)(*src) << 8); ++src; - green = ((ush)(*src) << 8); ++src; - blue = ((ush)(*src) << 8); ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - XPutImage(display, window, gc, ximage, 0, 0, 0, 0, rpng2_info.width, - rpng2_info.height); - - return 0; - -} /* end function rpng2_x_load_bg_image() */ - - - - - -static void rpng2_x_display_row(ulg row) -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *src, *src2=NULL; - char *dest; - uch r, g, b, a; - int ximage_rowbytes = ximage->bytes_per_line; - ulg i, pixel; - static int rows=0, prevpass=(-1); - static ulg firstrow; - -/*--------------------------------------------------------------------------- - rows and firstrow simply track how many rows (and which ones) have not - yet been displayed; alternatively, we could call XPutImage() for every - row and not bother with the records-keeping. - ---------------------------------------------------------------------------*/ - - Trace((stderr, "beginning rpng2_x_display_row()\n")) - - if (rpng2_info.pass != prevpass) { - if (pause_after_pass && rpng2_info.pass > 0) { - XEvent e; - KeySym k; - - fprintf(stderr, - "%s: end of pass %d of 7; click in image window to continue\n", - PROGNAME, prevpass + 1); - do - XNextEvent(display, &e); - while (!QUIT(e,k)); - } - fprintf(stderr, "%s: pass %d of 7\r", PROGNAME, rpng2_info.pass + 1); - fflush(stderr); - prevpass = rpng2_info.pass; - } - - if (rows == 0) - firstrow = row; /* first row that is not yet displayed */ - - ++rows; /* count of rows received but not yet displayed */ - -/*--------------------------------------------------------------------------- - Aside from the use of the rpng2_info struct, the lack of an outer loop - (over rows) and moving the XPutImage() call outside the "if (depth)" - tests, this routine is identical to rpng_x_display_image() in the non- - progressive version of the program. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - int bpp = ximage->bits_per_pixel; - - src = rpng2_info.image_data + row*rpng2_info.rowbytes; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG? this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = r; - green = g; - blue = b; - } else if (a == 0) { - red = bg_red; - green = bg_green; - blue = bg_blue; - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result into the - * first argument */ - alpha_composite(red, r, a, bg_red); - alpha_composite(green, g, a, bg_green); - alpha_composite(blue, b, a, bg_blue); - } - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG? this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - } - - } else if (depth == 16) { - ush red, green, blue; - - src = rpng2_info.row_pointers[row]; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = ((ush)(*src) << 8); - ++src; - green = ((ush)(*src) << 8); - ++src; - blue = ((ush)(*src) << 8); - ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } else if (a == 0) { - red = ((ush)bg_red << 8); - green = ((ush)bg_green << 8); - blue = ((ush)bg_blue << 8); - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result back into - * the first argument (== fg byte here: safe) */ - alpha_composite(r, r, a, bg_red); - alpha_composite(g, g, a, bg_green); - alpha_composite(b, b, a, bg_blue); - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - -/*--------------------------------------------------------------------------- - Display after every 16 rows or when on one of last two rows. (Region - may include previously displayed lines due to interlacing--i.e., not - contiguous. Also, second-to-last row is final one in interlaced images - with odd number of rows.) For demos, flush (and delay) after every 16th - row so "sparse" passes don't go twice as fast. - ---------------------------------------------------------------------------*/ - - if (demo_timing && (row - firstrow >= 16 || row >= rpng2_info.height-2)) { - XPutImage(display, window, gc, ximage, 0, (int)firstrow, 0, - (int)firstrow, rpng2_info.width, row - firstrow + 1); - XFlush(display); - rows = 0; - usleep(usleep_duration); - } else - if (!demo_timing && ((rows & 0xf) == 0 || row >= rpng2_info.height-2)) { - XPutImage(display, window, gc, ximage, 0, (int)firstrow, 0, - (int)firstrow, rpng2_info.width, row - firstrow + 1); - XFlush(display); - rows = 0; - } - -} - - - - - -static void rpng2_x_finish_display(void) -{ - Trace((stderr, "beginning rpng2_x_finish_display()\n")) - - /* last row has already been displayed by rpng2_x_display_row(), so we - * have nothing to do here except set a flag and let the user know that - * the image is done */ - - rpng2_info.state = kDone; - printf( - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n"); - fflush(stdout); -} - - - - - -static void rpng2_x_redisplay_image(ulg startcol, ulg startrow, - ulg width, ulg height) -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *src, *src2=NULL; - char *dest; - uch r, g, b, a; - ulg i, row, lastrow = 0; - ulg pixel; - int ximage_rowbytes = ximage->bytes_per_line; - - - Trace((stderr, "beginning display loop (image_channels == %d)\n", - rpng2_info.channels)) - Trace((stderr, " (width = %ld, rowbytes = %d, ximage_rowbytes = %d)\n", - rpng2_info.width, rpng2_info.rowbytes, ximage_rowbytes)) - Trace((stderr, " (bpp = %d)\n", ximage->bits_per_pixel)) - Trace((stderr, " (byte_order = %s)\n", ximage->byte_order == MSBFirst? - "MSBFirst" : (ximage->byte_order == LSBFirst? "LSBFirst" : "unknown"))) - -/*--------------------------------------------------------------------------- - Aside from the use of the rpng2_info struct and of src2 (for background - image), this routine is identical to rpng_x_display_image() in the non- - progressive version of the program--for the simple reason that redisplay - of the image against a new background happens after the image is fully - decoded and therefore is, by definition, non-progressive. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - int bpp = ximage->bits_per_pixel; - - for (lastrow = row = startrow; row < startrow+height; ++row) { - src = rpng2_info.image_data + row*rpng2_info.rowbytes; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; -#ifdef NO_24BIT_MASKS - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#else - red = (RShift < 0)? red << (-RShift) : red >> RShift; - green = (GShift < 0)? green << (-GShift) : green >> GShift; - blue = (BShift < 0)? blue << (-BShift) : blue >> BShift; - pixel = (red & RMask) | (green & GMask) | (blue & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG */ - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift/RMask/etc. here, too) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#endif - } - - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = r; - green = g; - blue = b; - } else if (a == 0) { - red = bg_red; - green = bg_green; - blue = bg_blue; - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result into the - * first argument */ - alpha_composite(red, r, a, bg_red); - alpha_composite(green, g, a, bg_green); - alpha_composite(blue, b, a, bg_blue); - } -#ifdef NO_24BIT_MASKS - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#else - red = (RShift < 0)? red << (-RShift) : red >> RShift; - green = (GShift < 0)? green << (-GShift) : green >> GShift; - blue = (BShift < 0)? blue << (-BShift) : blue >> BShift; - pixel = (red & RMask) | (green & GMask) | (blue & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG */ - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift/RMask/etc. here, too) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#endif - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, rpng2_info.width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else if (depth == 16) { - ush red, green, blue; - - for (lastrow = row = startrow; row < startrow+height; ++row) { - src = rpng2_info.row_pointers[row]; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = ((ush)(*src) << 8); - ++src; - green = ((ush)(*src) << 8); - ++src; - blue = ((ush)(*src) << 8); - ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } else if (a == 0) { - red = ((ush)bg_red << 8); - green = ((ush)bg_green << 8); - blue = ((ush)bg_blue << 8); - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result back into - * the first argument (== fg byte here: safe) */ - alpha_composite(r, r, a, bg_red); - alpha_composite(g, g, a, bg_green); - alpha_composite(b, b, a, bg_blue); - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, rpng2_info.width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - Trace((stderr, "calling final XPutImage()\n")) - if (lastrow < startrow+height) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, rpng2_info.width, rpng2_info.height-lastrow); - XFlush(display); - } - - (void)startcol; - (void)width; - -} /* end function rpng2_x_redisplay_image() */ - - - - - -#ifdef FEATURE_LOOP - -static void rpng2_x_reload_bg_image(void) -{ - char *dest; - uch r1, r2, g1, g2, b1, b2; - uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv; - int k, hmax, max; - int xidx, yidx, yidx_max; - int even_odd_vert, even_odd_horiz, even_odd; - int invert_gradient2 = (bg[pat].type & 0x08); - int invert_column; - ulg i, row; - - - bgscale = (pat == 0)? 8 : bgscale_default; - yidx_max = bgscale - 1; - -/*--------------------------------------------------------------------------- - Vertical gradients (ramps) in NxN squares, alternating direction and - colors (N == bgscale). - ---------------------------------------------------------------------------*/ - - if ((bg[pat].type & 0x07) == 0) { - uch r1_min = rgb[bg[pat].rgb1_min].r; - uch g1_min = rgb[bg[pat].rgb1_min].g; - uch b1_min = rgb[bg[pat].rgb1_min].b; - uch r2_min = rgb[bg[pat].rgb2_min].r; - uch g2_min = rgb[bg[pat].rgb2_min].g; - uch b2_min = rgb[bg[pat].rgb2_min].b; - int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min; - int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min; - int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min; - int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min; - int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min; - int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - even_odd_vert = (int)((row / bgscale) & 1); - - r1 = r1_min + (r1_diff * yidx) / yidx_max; - g1 = g1_min + (g1_diff * yidx) / yidx_max; - b1 = b1_min + (b1_diff * yidx) / yidx_max; - r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max; - g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max; - b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max; - - r2 = r2_min + (r2_diff * yidx) / yidx_max; - g2 = g2_min + (g2_diff * yidx) / yidx_max; - b2 = b2_min + (b2_diff * yidx) / yidx_max; - r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max; - g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max; - b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max; - - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - even_odd_horiz = (int)((i / bgscale) & 1); - even_odd = even_odd_vert ^ even_odd_horiz; - invert_column = - (even_odd_horiz && (bg[pat].type & 0x10)); - if (even_odd == 0) { /* gradient #1 */ - if (invert_column) { - *dest++ = r1_inv; - *dest++ = g1_inv; - *dest++ = b1_inv; - } else { - *dest++ = r1; - *dest++ = g1; - *dest++ = b1; - } - } else { /* gradient #2 */ - if ((invert_column && invert_gradient2) || - (!invert_column && !invert_gradient2)) - { - *dest++ = r2; /* not inverted or */ - *dest++ = g2; /* doubly inverted */ - *dest++ = b2; - } else { - *dest++ = r2_inv; - *dest++ = g2_inv; /* singly inverted */ - *dest++ = b2_inv; - } - } - } - } - -/*--------------------------------------------------------------------------- - Soft gradient-diamonds with scale = bgscale. Code contributed by Adam - M. Costello. - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 1) { - - hmax = (bgscale-1)/2; /* half the max weight of a color */ - max = 2*hmax; /* the max weight of a color */ - - r1 = rgb[bg[pat].rgb1_max].r; - g1 = rgb[bg[pat].rgb1_max].g; - b1 = rgb[bg[pat].rgb1_max].b; - r2 = rgb[bg[pat].rgb2_max].r; - g2 = rgb[bg[pat].rgb2_max].g; - b2 = rgb[bg[pat].rgb2_max].b; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - if (yidx > hmax) - yidx = bgscale-1 - yidx; - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - xidx = (int)(i % bgscale); - if (xidx > hmax) - xidx = bgscale-1 - xidx; - k = xidx + yidx; - *dest++ = (k*r1 + (max-k)*r2) / max; - *dest++ = (k*g1 + (max-k)*g2) / max; - *dest++ = (k*b1 + (max-k)*b2) / max; - } - } - -/*--------------------------------------------------------------------------- - Radial "starburst" with azimuthal sinusoids; [eventually number of sinu- - soids will equal bgscale?]. This one is slow but very cool. Code con- - tributed by Pieter S. van der Meulen (originally in Smalltalk). - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 2) { - uch ch; - int ii, x, y, hw, hh, grayspot; - double freq, rotate, saturate, gray, intensity; - double angle=0.0, aoffset=0.0, maxDist, dist; - double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t; - - hh = (int)(rpng2_info.height / 2); - hw = (int)(rpng2_info.width / 2); - - /* variables for radial waves: - * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED] - * freq: number of color beams originating from the center - * grayspot: size of the graying center area (anti-alias) - * rotate: rotation of the beams as a function of radius - * saturate: saturation of beams' shape azimuthally - */ - angle = CLIP(angle, 0.0, 360.0); - grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw)); - freq = MAX((double)bg[pat].bg_freq, 0.0); - saturate = (double)bg[pat].bg_bsat * 0.1; - rotate = (double)bg[pat].bg_brot * 0.1; - gray = 0.0; - intensity = 0.0; - maxDist = (double)((hw*hw) + (hh*hh)); - - for (row = 0; row < rpng2_info.height; ++row) { - y = (int)(row - hh); - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - x = (int)(i - hw); - angle = (x == 0)? PI_2 : atan((double)y / (double)x); - gray = (double)MAX(ABS(y), ABS(x)) / grayspot; - gray = MIN(1.0, gray); - dist = (double)((x*x) + (y*y)) / maxDist; - intensity = cos((angle+(rotate*dist*PI)) * freq) * - gray * saturate; - intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5; - hue = (angle + PI) * INV_PI_360 + aoffset; - s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh)); - s = MIN(MAX(s,0.0), 1.0); - v = MIN(MAX(intensity,0.0), 1.0); - - if (s == 0.0) { - ch = (uch)(v * 255.0); - *dest++ = ch; - *dest++ = ch; - *dest++ = ch; - } else { - if ((hue < 0.0) || (hue >= 360.0)) - hue -= (((int)(hue / 360.0)) * 360.0); - hue /= 60.0; - ii = (int)hue; - f = hue - (double)ii; - p = (1.0 - s) * v; - q = (1.0 - (s * f)) * v; - t = (1.0 - (s * (1.0 - f))) * v; - if (ii == 0) { red = v; green = t; blue = p; } - else if (ii == 1) { red = q; green = v; blue = p; } - else if (ii == 2) { red = p; green = v; blue = t; } - else if (ii == 3) { red = p; green = q; blue = v; } - else if (ii == 4) { red = t; green = p; blue = v; } - else if (ii == 5) { red = v; green = p; blue = q; } - *dest++ = (uch)(red * 255.0); - *dest++ = (uch)(green * 255.0); - *dest++ = (uch)(blue * 255.0); - } - } - } - } - -} /* end function rpng2_x_reload_bg_image() */ - - - - - -static int is_number(char *p) -{ - while (*p) { - if (!isdigit(*p)) - return FALSE; - ++p; - } - return TRUE; -} - -#endif /* FEATURE_LOOP */ - - - - - -static void rpng2_x_cleanup(void) -{ - if (bg_image && bg_data) { - free(bg_data); - bg_data = NULL; - } - - if (rpng2_info.image_data) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - } - - if (rpng2_info.row_pointers) { - free(rpng2_info.row_pointers); - rpng2_info.row_pointers = NULL; - } - - if (ximage) { - if (ximage->data) { - free(ximage->data); /* we allocated it, so we free it */ - ximage->data = (char *)NULL; /* instead of XDestroyImage() */ - } - XDestroyImage(ximage); - ximage = NULL; - } - - if (have_gc) - XFreeGC(display, gc); - - if (have_window) - XDestroyWindow(display, window); - - if (have_colormap) - XFreeColormap(display, colormap); - - if (have_nondefault_visual) - XFree(visual_list); -} - - - - - -static int rpng2_x_msb(ulg u32val) -{ - int i; - - for (i = 31; i >= 0; --i) { - if (u32val & 0x80000000L) - break; - u32val <<= 1; - } - return i; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/toucan.png b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/toucan.png Binary files differdeleted file mode 100644 index 03960d49399..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/toucan.png +++ /dev/null diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/wpng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/wpng.c deleted file mode 100644 index a06e3529ecb..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/wpng.c +++ /dev/null @@ -1,853 +0,0 @@ -/*--------------------------------------------------------------------------- - - wpng - simple PNG-writing program wpng.c - - This program converts certain NetPBM binary files (grayscale and RGB, - maxval = 255) to PNG. Non-interlaced PNGs are written progressively; - interlaced PNGs are read and written in one memory-intensive blast. - - Thanks to Jean-loup Gailly for providing the necessary trick to read - interactive text from the keyboard while stdin is redirected. Thanks - to Cosmin Truta for Cygwin fixes. - - NOTE: includes provisional support for PNM type "8" (portable alphamap) - images, presumed to be a 32-bit interleaved RGBA format; no pro- - vision for possible interleaved grayscale+alpha (16-bit) format. - THIS IS UNLIKELY TO BECOME AN OFFICIAL NETPBM ALPHA FORMAT! - - to do: - - delete output file if quit before calling any writepng routines - - process backspace with -text option under DOS/Win? (currently get ^H) - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: modified to allow abbreviated options - - 1.03: removed extraneous character from usage screen; fixed bug in - command-line parsing - - 1.04: fixed DOS/OS2/Win32 detection, including partial Cygwin fix - (see http://home.att.net/~perlspinr/diffs/GregBook_cygwin.diff) - - 2.00: dual-licensed (added GNU GPL) - - [REPORTED BUG (win32 only): "contrib/gregbook/wpng.c - cmd line - dose not work! In order to do something useful I needed to redirect - both input and output, with cygwin and with bcc32 as well. Under - Linux, the same wpng appears to work fine. I don't know what is - the problem."] - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "wpng" -#define VERSION "2.00 of 2 June 2007" -#define APPNAME "Simple PGM/PPM/PAM to PNG Converter" - -#if defined(__MSDOS__) || defined(__OS2__) -# define DOS_OS2_W32 -#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) -# ifndef __GNUC__ /* treat Win32 native ports of gcc as Unix environments */ -# define DOS_OS2_W32 -# endif -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <setjmp.h> /* for jmpbuf declaration in writepng.h */ -#include <time.h> - -#ifdef DOS_OS2_W32 -# include <io.h> /* for isatty(), setmode() prototypes */ -# include <fcntl.h> /* O_BINARY for fdopen() without text translation */ -# ifdef __EMX__ -# ifndef getch -# define getch() _read_kbd(0, 1, 0) /* need getche() */ -# endif -# else /* !__EMX__ */ -# ifdef __GO32__ -# include <pc.h> -# define getch() getkey() /* GRR: need getche() */ -# else -# include <conio.h> /* for getche() console input */ -# endif -# endif /* ?__EMX__ */ -# define FGETS(buf,len,stream) dos_kbd_gets(buf,len) -#else -# include <unistd.h> /* for isatty() prototype */ -# define FGETS fgets -#endif - -/* #define DEBUG : this enables the Trace() macros */ - -/* #define FORBID_LATIN1_CTRL : this requires the user to re-enter any - text that includes control characters discouraged by the PNG spec; text - that includes an escape character (27) must be re-entered regardless */ - -#include "writepng.h" /* typedefs, common macros, writepng prototypes */ - - - -/* local prototypes */ - -static int wpng_isvalid_latin1(uch *p, int len); -static void wpng_cleanup(void); - -#ifdef DOS_OS2_W32 - static char *dos_kbd_gets(char *buf, int len); -#endif - - - -static mainprog_info wpng_info; /* lone global */ - - - -int main(int argc, char **argv) -{ -#ifndef DOS_OS2_W32 - FILE *keybd; -#endif -#ifdef sgi - FILE *tmpfile; /* or we could just use keybd, since no overlap */ - char tmpline[80]; -#endif - char *inname = NULL, outname[256]; - char *p, pnmchar, pnmline[256]; - char *bgstr, *textbuf = NULL; - ulg rowbytes; - int rc, len = 0; - int error = 0; - int text = FALSE; - int maxval; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - double default_gamma = 0.0; - - - wpng_info.infile = NULL; - wpng_info.outfile = NULL; - wpng_info.image_data = NULL; - wpng_info.row_pointers = NULL; - wpng_info.filter = FALSE; - wpng_info.interlaced = FALSE; - wpng_info.have_bg = FALSE; - wpng_info.have_time = FALSE; - wpng_info.have_text = 0; - wpng_info.gamma = 0.0; - - - /* First get the default value for our display-system exponent, i.e., - * the product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. If the PNM image - * looks correct on the user's display system, its file gamma is the - * inverse of this value. (Note that this is not an exhaustive list - * of LUT values--e.g., OpenStep has a lot of weird ones--but it should - * cover 99% of the current possibilities. This section must ensure - * that default_display_exponent is positive.) */ - -#if defined(NeXT) - /* third-party utilities can modify the default LUT exponent */ - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to - * get the "gamma" value, so we do it the hard way */ - tmpfile = fopen("/etc/config/system.glGammaVal", "r"); - if (tmpfile) { - double sgi_gamma; - - fgets(tmpline, 80, tmpfile); - fclose(tmpfile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) { - double exponent = atof(p); - - if (exponent > 0.0) - default_gamma = 1.0 / exponent; - } - - if (default_gamma == 0.0) - default_gamma = 1.0 / default_display_exponent; - - - /* Now parse the command line for options and the PNM filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-i", 2)) { - wpng_info.interlaced = TRUE; - } else if (!strncmp(*argv, "-time", 3)) { - wpng_info.modtime = time(NULL); - wpng_info.have_time = TRUE; - } else if (!strncmp(*argv, "-text", 3)) { - text = TRUE; - } else if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - wpng_info.gamma = atof(*argv); - if (wpng_info.gamma <= 0.0) - ++error; - else if (wpng_info.gamma > 1.01) - fprintf(stderr, PROGNAME - " warning: file gammas are usually less than 1.0\n"); - } - } else if (!strncmp(*argv, "-bgcolor", 4)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else { - unsigned r, g, b; /* this way quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - wpng_info.bg_red = (uch)r; - wpng_info.bg_green = (uch)g; - wpng_info.bg_blue = (uch)b; - wpng_info.have_bg = TRUE; - } - } - } else { - if (**argv != '-') { - inname = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - - /* open the input and output files, or register an error and abort */ - - if (!inname) { - if (isatty(0)) { - fprintf(stderr, PROGNAME - ": must give input filename or provide image data via stdin\n"); - ++error; - } else { -#ifdef DOS_OS2_W32 - /* some buggy C libraries require BOTH setmode() and fdopen(bin) */ - setmode(fileno(stdin), O_BINARY); - setmode(fileno(stdout), O_BINARY); -#endif - if ((wpng_info.infile = fdopen(fileno(stdin), "rb")) == NULL) { - fprintf(stderr, PROGNAME - ": unable to reopen stdin in binary mode\n"); - ++error; - } else - if ((wpng_info.outfile = fdopen(fileno(stdout), "wb")) == NULL) { - fprintf(stderr, PROGNAME - ": unable to reopen stdout in binary mode\n"); - fclose(wpng_info.infile); - ++error; - } else - wpng_info.filter = TRUE; - } - } else if ((len = strlen(inname)) > 250) { - fprintf(stderr, PROGNAME ": input filename is too long [%d chars]\n", - len); - ++error; - } else if (!(wpng_info.infile = fopen(inname, "rb"))) { - fprintf(stderr, PROGNAME ": can't open input file [%s]\n", inname); - ++error; - } - - if (!error) { - fgets(pnmline, 256, wpng_info.infile); - if (pnmline[0] != 'P' || ((pnmchar = pnmline[1]) != '5' && - pnmchar != '6' && pnmchar != '8')) - { - fprintf(stderr, PROGNAME - ": input file [%s] is not a binary PGM, PPM or PAM file\n", - inname); - ++error; - } else { - wpng_info.pnmtype = (int)(pnmchar - '0'); - if (wpng_info.pnmtype != 8) - wpng_info.have_bg = FALSE; /* no need for bg if opaque */ - do { - fgets(pnmline, 256, wpng_info.infile); /* lose any comments */ - } while (pnmline[0] == '#'); - sscanf(pnmline, "%ld %ld", &wpng_info.width, &wpng_info.height); - do { - fgets(pnmline, 256, wpng_info.infile); /* more comment lines */ - } while (pnmline[0] == '#'); - sscanf(pnmline, "%d", &maxval); - if (wpng_info.width <= 0L || wpng_info.height <= 0L || - maxval != 255) - { - fprintf(stderr, PROGNAME - ": only positive width/height, maxval == 255 allowed \n"); - ++error; - } - wpng_info.sample_depth = 8; /* <==> maxval 255 */ - - if (!wpng_info.filter) { - /* make outname from inname */ - if ((p = strrchr(inname, '.')) == NULL || - (p - inname) != (len - 4)) - { - strcpy(outname, inname); - strcpy(outname+len, ".png"); - } else { - len -= 4; - strncpy(outname, inname, len); - strcpy(outname+len, ".png"); - } - /* check if outname already exists; if not, open */ - if ((wpng_info.outfile = fopen(outname, "rb")) != NULL) { - fprintf(stderr, PROGNAME ": output file exists [%s]\n", - outname); - fclose(wpng_info.outfile); - ++error; - } else if (!(wpng_info.outfile = fopen(outname, "wb"))) { - fprintf(stderr, PROGNAME ": can't open output file [%s]\n", - outname); - ++error; - } - } - } - if (error) { - fclose(wpng_info.infile); - wpng_info.infile = NULL; - if (wpng_info.filter) { - fclose(wpng_info.outfile); - wpng_info.outfile = NULL; - } - } - } - - - /* if we had any errors, print usage and die horrible death...arrr! */ - - if (error) { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, APPNAME); - writepng_version_info(); - fprintf(stderr, "\n" -"Usage: %s [-gamma exp] [-bgcolor bg] [-text] [-time] [-interlace] pnmfile\n" -"or: ... | %s [-gamma exp] [-bgcolor bg] [-text] [-time] [-interlace] | ...\n" - " exp \ttransfer-function exponent (``gamma'') of the image in\n" - "\t\t floating-point format (e.g., ``%.5f''); if image looks\n" - "\t\t correct on given display system, image gamma is equal to\n" - "\t\t inverse of display-system exponent, i.e., 1 / (LUT * CRT)\n" - "\t\t (where LUT = lookup-table exponent and CRT = CRT exponent;\n" - "\t\t first varies, second is usually 2.2, all are positive)\n" - " bg \tdesired background color for alpha-channel images, in\n" - "\t\t 7-character hex RGB format (e.g., ``#ff7700'' for orange:\n" - "\t\t same as HTML colors)\n" - " -text\tprompt interactively for text info (tEXt chunks)\n" - " -time\tinclude a tIME chunk (last modification time)\n" - " -interlace\twrite interlaced PNG image\n" - "\n" -"pnmfile or stdin must be a binary PGM (`P5'), PPM (`P6') or (extremely\n" -"unofficial and unsupported!) PAM (`P8') file. Currently it is required\n" -"to have maxval == 255 (i.e., no scaling). If pnmfile is specified, it\n" -"is converted to the corresponding PNG file with the same base name but a\n" -"``.png'' extension; files read from stdin are converted and sent to stdout.\n" -"The conversion is progressive (low memory usage) unless interlacing is\n" -"requested; in that case the whole image will be buffered in memory and\n" -"written in one call.\n" - "\n", PROGNAME, PROGNAME, default_gamma); - exit(1); - } - - - /* prepare the text buffers for libpng's use; note that even though - * PNG's png_text struct includes a length field, we don't have to fill - * it out */ - - if (text && -#ifndef DOS_OS2_W32 - (keybd = fdopen(fileno(stderr), "r")) != NULL && -#endif - (textbuf = (char *)malloc((5 + 9)*75)) != NULL) - { - int i, valid, result; - - fprintf(stderr, - "Enter text info (no more than 72 characters per line);\n"); - fprintf(stderr, "to skip a field, hit the <Enter> key.\n"); - /* note: just <Enter> leaves len == 1 */ - - do { - valid = TRUE; - p = textbuf + TEXT_TITLE_OFFSET; - fprintf(stderr, " Title: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.title = p; - wpng_info.have_text |= TEXT_TITLE; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_TITLE; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_TITLE; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_AUTHOR_OFFSET; - fprintf(stderr, " Author: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.author = p; - wpng_info.have_text |= TEXT_AUTHOR; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_AUTHOR; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_AUTHOR; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_DESC_OFFSET; - fprintf(stderr, " Description (up to 9 lines):\n"); - for (i = 1; i < 10; ++i) { - fprintf(stderr, " [%d] ", i); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) - p += len; /* now points at NULL; char before is newline */ - else - break; - } - if ((len = p - (textbuf + TEXT_DESC_OFFSET)) > 1) { - if (p[-1] == '\n') { - p[-1] = '\0'; - --len; - } - wpng_info.desc = textbuf + TEXT_DESC_OFFSET; - wpng_info.have_text |= TEXT_DESC; - p = textbuf + TEXT_DESC_OFFSET; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_DESC; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_DESC; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_COPY_OFFSET; - fprintf(stderr, " Copyright: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.copyright = p; - wpng_info.have_text |= TEXT_COPY; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_COPY; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_COPY; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_EMAIL_OFFSET; - fprintf(stderr, " E-mail: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.email = p; - wpng_info.have_text |= TEXT_EMAIL; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_EMAIL; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_EMAIL; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_URL_OFFSET; - fprintf(stderr, " URL: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.url = p; - wpng_info.have_text |= TEXT_URL; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_URL; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_URL; - valid = FALSE; - } -#endif - } - } - } while (!valid); - -#ifndef DOS_OS2_W32 - fclose(keybd); -#endif - - } else if (text) { - fprintf(stderr, PROGNAME ": unable to allocate memory for text\n"); - text = FALSE; - wpng_info.have_text = 0; - } - - - /* allocate libpng stuff, initialize transformations, write pre-IDAT data */ - - if ((rc = writepng_init(&wpng_info)) != 0) { - switch (rc) { - case 2: - fprintf(stderr, PROGNAME - ": libpng initialization problem (longjmp)\n"); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - case 11: - fprintf(stderr, PROGNAME - ": internal logic error (unexpected PNM type)\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown writepng_init() error\n"); - break; - } - exit(rc); - } - - - /* free textbuf, since it's a completely local variable and all text info - * has just been written to the PNG file */ - - if (text && textbuf) { - free(textbuf); - textbuf = NULL; - } - - - /* calculate rowbytes on basis of image type; note that this becomes much - * more complicated if we choose to support PBM type, ASCII PNM types, or - * 16-bit-per-sample binary data [currently not an official NetPBM type] */ - - if (wpng_info.pnmtype == 5) - rowbytes = wpng_info.width; - else if (wpng_info.pnmtype == 6) - rowbytes = wpng_info.width * 3; - else /* if (wpng_info.pnmtype == 8) */ - rowbytes = wpng_info.width * 4; - - - /* read and write the image, either in its entirety (if writing interlaced - * PNG) or row by row (if non-interlaced) */ - - fprintf(stderr, "Encoding image data...\n"); - fflush(stderr); - - if (wpng_info.interlaced) { - long i; - ulg bytes; - ulg image_bytes = rowbytes * wpng_info.height; /* overflow? */ - - wpng_info.image_data = (uch *)malloc(image_bytes); - wpng_info.row_pointers = (uch **)malloc(wpng_info.height*sizeof(uch *)); - if (wpng_info.image_data == NULL || wpng_info.row_pointers == NULL) { - fprintf(stderr, PROGNAME ": insufficient memory for image data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(5); - } - for (i = 0; i < wpng_info.height; ++i) - wpng_info.row_pointers[i] = wpng_info.image_data + i*rowbytes; - bytes = fread(wpng_info.image_data, 1, image_bytes, wpng_info.infile); - if (bytes != image_bytes) { - fprintf(stderr, PROGNAME ": expected %lu bytes, got %lu bytes\n", - image_bytes, bytes); - fprintf(stderr, " (continuing anyway)\n"); - } - if (writepng_encode_image(&wpng_info) != 0) { - fprintf(stderr, PROGNAME - ": libpng problem (longjmp) while writing image data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - - } else /* not interlaced: write progressively (row by row) */ { - long j; - ulg bytes; - - wpng_info.image_data = (uch *)malloc(rowbytes); - if (wpng_info.image_data == NULL) { - fprintf(stderr, PROGNAME ": insufficient memory for row data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(5); - } - error = 0; - for (j = wpng_info.height; j > 0L; --j) { - bytes = fread(wpng_info.image_data, 1, rowbytes, wpng_info.infile); - if (bytes != rowbytes) { - fprintf(stderr, PROGNAME - ": expected %lu bytes, got %lu bytes (row %ld)\n", rowbytes, - bytes, wpng_info.height-j); - ++error; - break; - } - if (writepng_encode_row(&wpng_info) != 0) { - fprintf(stderr, PROGNAME - ": libpng problem (longjmp) while writing row %ld\n", - wpng_info.height-j); - ++error; - break; - } - } - if (error) { - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - if (writepng_encode_finish(&wpng_info) != 0) { - fprintf(stderr, PROGNAME ": error on final libpng call\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - } - - - /* OK, we're done (successfully): clean up all resources and quit */ - - fprintf(stderr, "Done.\n"); - fflush(stderr); - - writepng_cleanup(&wpng_info); - wpng_cleanup(); - - return 0; -} - - - - - -static int wpng_isvalid_latin1(uch *p, int len) -{ - int i, result = -1; - - for (i = 0; i < len; ++i) { - if (p[i] == 10 || (p[i] > 31 && p[i] < 127) || p[i] > 160) - continue; /* character is completely OK */ - if (result < 0 || (p[result] != 27 && p[i] == 27)) - result = i; /* mark location of first questionable one */ - } /* or of first escape character (bad) */ - - return result; -} - - - - - -static void wpng_cleanup(void) -{ - if (wpng_info.outfile) { - fclose(wpng_info.outfile); - wpng_info.outfile = NULL; - } - - if (wpng_info.infile) { - fclose(wpng_info.infile); - wpng_info.infile = NULL; - } - - if (wpng_info.image_data) { - free(wpng_info.image_data); - wpng_info.image_data = NULL; - } - - if (wpng_info.row_pointers) { - free(wpng_info.row_pointers); - wpng_info.row_pointers = NULL; - } -} - - - - -#ifdef DOS_OS2_W32 - -static char *dos_kbd_gets(char *buf, int len) -{ - int ch, count=0; - - do { - buf[count++] = ch = getche(); - } while (ch != '\r' && count < len-1); - - buf[count--] = '\0'; /* terminate string */ - if (buf[count] == '\r') /* Enter key makes CR, so change to newline */ - buf[count] = '\n'; - - fprintf(stderr, "\n"); /* Enter key does *not* cause a newline */ - fflush(stderr); - - return buf; -} - -#endif /* DOS_OS2_W32 */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/writepng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/writepng.c deleted file mode 100644 index c5c9534797b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/writepng.c +++ /dev/null @@ -1,401 +0,0 @@ -/*--------------------------------------------------------------------------- - - wpng - simple PNG-writing program writepng.c - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - - -#include <stdlib.h> /* for exit() prototype */ -#include <zlib.h> - -#include "png.h" /* libpng header, includes setjmp.h */ -#include "writepng.h" /* typedefs, common macros, public prototypes */ - - -/* local prototype */ - -static void writepng_error_handler(png_structp png_ptr, png_const_charp msg); - - - -void writepng_version_info(void) -{ - fprintf(stderr, " Compiled with libpng %s; using libpng %s.\n", - PNG_LIBPNG_VER_STRING, png_libpng_ver); - fprintf(stderr, " Compiled with zlib %s; using zlib %s.\n", - ZLIB_VERSION, zlib_version); -} - - - - -/* returns 0 for success, 2 for libpng problem, 4 for out of memory, 11 for - * unexpected pnmtype; note that outfile might be stdout */ - -int writepng_init(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr; /* note: temporary variables! */ - png_infop info_ptr; - int color_type, interlace_type; - - - /* could also replace libpng warning-handler (final NULL), but no need: */ - - png_ptr = png_create_write_struct(png_get_libpng_ver(NULL), mainprog_ptr, - writepng_error_handler, NULL); - if (!png_ptr) - return 4; /* out of memory */ - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) { - png_destroy_write_struct(&png_ptr, NULL); - return 4; /* out of memory */ - } - - - /* setjmp() must be called in every function that calls a PNG-writing - * libpng function, unless an alternate error handler was installed-- - * but compatible error handlers must either use longjmp() themselves - * (as in this program) or some other method to return control to - * application code, so here we go: */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - return 2; - } - - - /* make sure outfile is (re)opened in BINARY mode */ - - png_init_io(png_ptr, mainprog_ptr->outfile); - - - /* set the compression levels--in general, always want to leave filtering - * turned on (except for palette images) and allow all of the filters, - * which is the default; want 32K zlib window, unless entire image buffer - * is 16K or smaller (unknown here)--also the default; usually want max - * compression (NOT the default); and remaining compression flags should - * be left alone */ - - png_set_compression_level(png_ptr, Z_BEST_COMPRESSION); -/* - >> this is default for no filtering; Z_FILTERED is default otherwise: - png_set_compression_strategy(png_ptr, Z_DEFAULT_STRATEGY); - >> these are all defaults: - png_set_compression_mem_level(png_ptr, 8); - png_set_compression_window_bits(png_ptr, 15); - png_set_compression_method(png_ptr, 8); - */ - - - /* set the image parameters appropriately */ - - if (mainprog_ptr->pnmtype == 5) - color_type = PNG_COLOR_TYPE_GRAY; - else if (mainprog_ptr->pnmtype == 6) - color_type = PNG_COLOR_TYPE_RGB; - else if (mainprog_ptr->pnmtype == 8) - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - else { - png_destroy_write_struct(&png_ptr, &info_ptr); - return 11; - } - - interlace_type = mainprog_ptr->interlaced? PNG_INTERLACE_ADAM7 : - PNG_INTERLACE_NONE; - - png_set_IHDR(png_ptr, info_ptr, mainprog_ptr->width, mainprog_ptr->height, - mainprog_ptr->sample_depth, color_type, interlace_type, - PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); - - if (mainprog_ptr->gamma > 0.0) - png_set_gAMA(png_ptr, info_ptr, mainprog_ptr->gamma); - - if (mainprog_ptr->have_bg) { /* we know it's RGBA, not gray+alpha */ - png_color_16 background; - - background.red = mainprog_ptr->bg_red; - background.green = mainprog_ptr->bg_green; - background.blue = mainprog_ptr->bg_blue; - png_set_bKGD(png_ptr, info_ptr, &background); - } - - if (mainprog_ptr->have_time) { - png_time modtime; - - png_convert_from_time_t(&modtime, mainprog_ptr->modtime); - png_set_tIME(png_ptr, info_ptr, &modtime); - } - - if (mainprog_ptr->have_text) { - png_text text[6]; - int num_text = 0; - - if (mainprog_ptr->have_text & TEXT_TITLE) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Title"; - text[num_text].text = mainprog_ptr->title; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_AUTHOR) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Author"; - text[num_text].text = mainprog_ptr->author; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_DESC) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Description"; - text[num_text].text = mainprog_ptr->desc; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_COPY) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Copyright"; - text[num_text].text = mainprog_ptr->copyright; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_EMAIL) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "E-mail"; - text[num_text].text = mainprog_ptr->email; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_URL) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "URL"; - text[num_text].text = mainprog_ptr->url; - ++num_text; - } - png_set_text(png_ptr, info_ptr, text, num_text); - } - - - /* write all chunks up to (but not including) first IDAT */ - - png_write_info(png_ptr, info_ptr); - - - /* if we wanted to write any more text info *after* the image data, we - * would set up text struct(s) here and call png_set_text() again, with - * just the new data; png_set_tIME() could also go here, but it would - * have no effect since we already called it above (only one tIME chunk - * allowed) */ - - - /* set up the transformations: for now, just pack low-bit-depth pixels - * into bytes (one, two or four pixels per byte) */ - - png_set_packing(png_ptr); -/* png_set_shift(png_ptr, &sig_bit); to scale low-bit-depth values */ - - - /* make sure we save our pointers for use in writepng_encode_image() */ - - mainprog_ptr->png_ptr = png_ptr; - mainprog_ptr->info_ptr = info_ptr; - - - /* OK, that's all we need to do for now; return happy */ - - return 0; -} - - - - - -/* returns 0 for success, 2 for libpng (longjmp) problem */ - -int writepng_encode_image(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* as always, setjmp() must be called in every function that calls a - * PNG-writing libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* and now we just write the whole image; libpng takes care of interlacing - * for us */ - - png_write_image(png_ptr, mainprog_ptr->row_pointers); - - - /* since that's it, we also close out the end of the PNG file now--if we - * had any text or time info to write after the IDATs, second argument - * would be info_ptr, but we optimize slightly by sending NULL pointer: */ - - png_write_end(png_ptr, NULL); - - return 0; -} - - - - - -/* returns 0 if succeeds, 2 if libpng problem */ - -int writepng_encode_row(mainprog_info *mainprog_ptr) /* NON-interlaced only! */ -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* as always, setjmp() must be called in every function that calls a - * PNG-writing libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* image_data points at our one row of image data */ - - png_write_row(png_ptr, mainprog_ptr->image_data); - - return 0; -} - - - - - -/* returns 0 if succeeds, 2 if libpng problem */ - -int writepng_encode_finish(mainprog_info *mainprog_ptr) /* NON-interlaced! */ -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* as always, setjmp() must be called in every function that calls a - * PNG-writing libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* close out PNG file; if we had any text or time info to write after - * the IDATs, second argument would be info_ptr: */ - - png_write_end(png_ptr, NULL); - - return 0; -} - - - - - -void writepng_cleanup(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - if (png_ptr && info_ptr) - png_destroy_write_struct(&png_ptr, &info_ptr); -} - - - - - -static void writepng_error_handler(png_structp png_ptr, png_const_charp msg) -{ - mainprog_info *mainprog_ptr; - - /* This function, aside from the extra step of retrieving the "error - * pointer" (below) and the fact that it exists within the application - * rather than within libpng, is essentially identical to libpng's - * default error handler. The second point is critical: since both - * setjmp() and longjmp() are called from the same code, they are - * guaranteed to have compatible notions of how big a jmp_buf is, - * regardless of whether _BSD_SOURCE or anything else has (or has not) - * been defined. */ - - fprintf(stderr, "writepng libpng error: %s\n", msg); - fflush(stderr); - - mainprog_ptr = png_get_error_ptr(png_ptr); - if (mainprog_ptr == NULL) { /* we are completely hosed now */ - fprintf(stderr, - "writepng severe error: jmpbuf not recoverable; terminating.\n"); - fflush(stderr); - exit(99); - } - - /* Now we have our data structure we can use the information in it - * to return control to our own higher level code (all the points - * where 'setjmp' is called in this file.) This will work with other - * error handling mechanisms as well - libpng always calls png_error - * when it can proceed no further, thus, so long as the error handler - * is intercepted, application code can do its own error recovery. - */ - longjmp(mainprog_ptr->jmpbuf, 1); -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/writepng.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/writepng.h deleted file mode 100644 index 78b966b5874..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/gregbook/writepng.h +++ /dev/null @@ -1,133 +0,0 @@ -/*--------------------------------------------------------------------------- - - wpng - simple PNG-writing program writepng.h - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#ifndef TRUE -# define TRUE 1 -# define FALSE 0 -#endif - -#ifndef MAX -# define MAX(a,b) ((a) > (b)? (a) : (b)) -# define MIN(a,b) ((a) < (b)? (a) : (b)) -#endif - -#ifdef DEBUG -# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} -#else -# define Trace(x) ; -#endif - -#define TEXT_TITLE 0x01 -#define TEXT_AUTHOR 0x02 -#define TEXT_DESC 0x04 -#define TEXT_COPY 0x08 -#define TEXT_EMAIL 0x10 -#define TEXT_URL 0x20 - -#define TEXT_TITLE_OFFSET 0 -#define TEXT_AUTHOR_OFFSET 72 -#define TEXT_COPY_OFFSET (2*72) -#define TEXT_EMAIL_OFFSET (3*72) -#define TEXT_URL_OFFSET (4*72) -#define TEXT_DESC_OFFSET (5*72) - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - -typedef struct _mainprog_info { - double gamma; - long width; - long height; - time_t modtime; - FILE *infile; - FILE *outfile; - void *png_ptr; - void *info_ptr; - uch *image_data; - uch **row_pointers; - char *title; - char *author; - char *desc; - char *copyright; - char *email; - char *url; - int filter; /* command-line-filter flag, not PNG row filter! */ - int pnmtype; - int sample_depth; - int interlaced; - int have_bg; - int have_time; - int have_text; - jmp_buf jmpbuf; - uch bg_red; - uch bg_green; - uch bg_blue; -} mainprog_info; - - -/* prototypes for public functions in writepng.c */ - -void writepng_version_info(void); - -int writepng_init(mainprog_info *mainprog_ptr); - -int writepng_encode_image(mainprog_info *mainprog_ptr); - -int writepng_encode_row(mainprog_info *mainprog_ptr); - -int writepng_encode_finish(mainprog_info *mainprog_ptr); - -void writepng_cleanup(mainprog_info *mainprog_ptr); diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/fakepng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/fakepng.c deleted file mode 100644 index fcc111286c6..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/fakepng.c +++ /dev/null @@ -1,57 +0,0 @@ -/* Fake a PNG - just write it out directly. */ -#include <stdio.h> -#include <zlib.h> /* for crc32 */ - -void -put_uLong(uLong val) -{ - putchar(val >> 24); - putchar(val >> 16); - putchar(val >> 8); - putchar(val >> 0); -} - -void -put_chunk(const unsigned char *chunk, uInt length) -{ - uLong crc; - - put_uLong(length-4); /* Exclude the tag */ - - fwrite(chunk, length, 1, stdout); - - crc = crc32(0, Z_NULL, 0); - put_uLong(crc32(crc, chunk, length)); -} - -const unsigned char signature[] = -{ - 137, 80, 78, 71, 13, 10, 26, 10 -}; - -const unsigned char IHDR[] = -{ - 73, 72, 68, 82, /* IHDR */ - 0, 0, 0, 1, /* width */ - 0, 0, 0, 1, /* height */ - 1, /* bit depth */ - 0, /* color type: greyscale */ - 0, /* compression method */ - 0, /* filter method */ - 0 /* interlace method: none */ -}; - -const unsigned char unknown[] = -{ - 'u', 'n', 'K', 'n' /* "unKn" - private safe to copy */ -}; - -int -main(void) -{ - fwrite(signature, sizeof signature, 1, stdout); - put_chunk(IHDR, sizeof IHDR); - - for (;;) - put_chunk(unknown, sizeof unknown); -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/gentests.sh b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/gentests.sh deleted file mode 100755 index f0f8d2395a5..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/gentests.sh +++ /dev/null @@ -1,102 +0,0 @@ -#!/bin/sh -# -# Copyright (c) 2013 John Cunningham Bowler -# -# Last changed in libpng 1.6.0 [February 14, 2013] -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h -# -# Generate a set of PNG test images. The images are generated in a -# sub-directory called 'tests' by default, however a command line argument will -# change that name. The generation requires a built version of makepng in the -# current directory. -# -usage(){ - exec >&2 - echo "$0 [<directory>]" - echo ' Generate a set of PNG test files in "directory" ("tests" by default)' - exit 1 -} - -mp="$PWD/makepng" -test -x "$mp" || { - exec >&2 - echo "$0: the 'makepng' program must exist" - echo " in the directory within which this program:" - echo " $mp" - echo " is executed" - usage -} - -# Just one argument: the directory -testdir="tests" -test $# -gt 1 && { - testdir="$1" - shift -} -test $# -eq 0 || usage - -# Take care not to clobber something -if test -e "$testdir" -then - test -d "$testdir" || usage -else - # mkdir -p isn't portable, so do the following - mkdir "$testdir" 2>/dev/null || mkdir -p "$testdir" || usage -fi - -# This fails in a very satisfactory way if it's not accessible -cd "$testdir" -:>"test$$.png" || { - exec >&2 - echo "$testdir: directory not writable" - usage -} -rm "test$$.png" || { - exec >&2 - echo "$testdir: you have create but not write privileges here." - echo " This is unexpected. You have a spurion; "'"'"test$$.png"'"'"." - echo " You need to remove this yourself. Try a different directory." - exit 1 -} - -# Now call makepng ($mp) to create every file we can think of with a -# reasonable name -doit(){ - for gamma in "" --sRGB --linear --1.8 - do - case "$gamma" in - "") - gname=;; - --sRGB) - gname="-srgb";; - --linear) - gname="-lin";; - --1.8) - gname="-18";; - *) - gname="-$gamma";; - esac - "$mp" $gamma "$1" "$2" "test-$1-$2$gname.png" - done -} -# -for ct in gray palette -do - for bd in 1 2 4 8 - do - doit "$ct" "$bd" - done -done -# -doit "gray" "16" -# -for ct in gray-alpha rgb rgb-alpha -do - for bd in 8 16 - do - doit "$ct" "$bd" - done -done diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/makepng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/makepng.c deleted file mode 100644 index 9f11b29645b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/makepng.c +++ /dev/null @@ -1,1486 +0,0 @@ -/* makepng.c - * - * Copyright (c) 2013 John Cunningham Bowler - * - * Last changed in libpng 1.6.1 [March 28, 2013] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Make a test PNG image. The arguments are as follows: - * - * makepng [--sRGB|--linear|--1.8] [--color=<color>] color-type bit-depth \ - * [file-name] - * - * The color-type may be numeric (and must match the numbers used by the PNG - * specification) or one of the format names listed below. The bit-depth is the - * component bit depth, or the pixel bit-depth for a color-mapped image. - * - * Without any options no color-space information is written, with the options - * an sRGB or the appropriate gAMA chunk is written. "1.8" refers to the - * display system used on older Apple computers to correct for high ambient - * light levels in the viewing environment; it applies a transform of - * approximately value^(1/1.45) to the color values and so a gAMA chunk of 65909 - * is written (1.45/2.2). - * - * The image data is generated internally. Unless --color is given the images - * used are as follows: - * - * 1 channel: a square image with a diamond, the least luminous colors are on - * the edge of the image, the most luminous in the center. - * - * 2 channels: the color channel increases in luminosity from top to bottom, the - * alpha channel increases in opacity from left to right. - * - * 3 channels: linear combinations of, from the top-left corner clockwise, - * black, green, white, red. - * - * 4 channels: linear combinations of, from the top-left corner clockwise, - * transparent, red, green, blue. - * - * For color-mapped images a four channel color-map is used and the PNG file has - * a tRNS chunk, as follows: - * - * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white - * 2-bit: entry 0: transparent-green - * entry 1: 40%-red - * entry 2: 80%-blue - * entry 3: opaque-white - * 4-bit: the 16 combinations of the 2-bit case - * 8-bit: the 256 combinations of the 4-bit case - * - * The palette always has 2^bit-depth entries and the tRNS chunk one fewer. The - * image is the 1-channel diamond, but using palette index, not luminosity. - * - * Image size is determined by the final pixel depth in bits, i.e. channels x - * bit-depth, as follows: - * - * 8 bits or less: 64x64 - * 16 bits: 256x256 - * More than 16 bits: 1024x1024 - * - * Row filtering is turned off (the 'none' filter is used on every row) and the - * images are not interlaced. - * - * If --color is given then the whole image has that color, color-mapped images - * will have exactly one palette entry and all image files with be 16x16 in - * size. The color value is 1 to 4 decimal numbers as appropriate for the color - * type. - * - * If file-name is given then the PNG is written to that file, else it is - * written to stdout. Notice that stdout is not supported on systems where, by - * default, it assumes text output; this program makes no attempt to change the - * text mode of stdout! - */ -#define _ISOC99_SOURCE /* for strtoull */ - -#include <stddef.h> /* for offsetof */ -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <ctype.h> -#include <math.h> -#include <errno.h> - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include <config.h> -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -/* This structure is used for inserting extra chunks (the --insert argument, not - * documented above.) - */ -typedef struct chunk_insert -{ - struct chunk_insert *next; - void (*insert)(png_structp, png_infop, int, png_charpp); - int nparams; - png_charp parameters[1]; -} chunk_insert; - -static int -channels_of_type(int color_type) -{ - if (color_type & PNG_COLOR_MASK_PALETTE) - return 1; - - else - { - int channels = 1; - - if (color_type & PNG_COLOR_MASK_COLOR) - channels = 3; - - if (color_type & PNG_COLOR_MASK_ALPHA) - return channels + 1; - - else - return channels; - } -} - -static int -pixel_depth_of_type(int color_type, int bit_depth) -{ - return channels_of_type(color_type) * bit_depth; -} - -static unsigned int -image_size_of_type(int color_type, int bit_depth, unsigned int *colors) -{ - if (*colors) - return 16; - - else - { - int pixel_depth = pixel_depth_of_type(color_type, bit_depth); - - if (pixel_depth < 8) - return 64; - - else if (pixel_depth > 16) - return 1024; - - else - return 256; - } -} - -static void -set_color(png_colorp color, png_bytep trans, unsigned int red, - unsigned int green, unsigned int blue, unsigned int alpha, - png_const_bytep gamma_table) -{ - color->red = gamma_table[red]; - color->green = gamma_table[green]; - color->blue = gamma_table[blue]; - *trans = (png_byte)alpha; -} - -static int -generate_palette(png_colorp palette, png_bytep trans, int bit_depth, - png_const_bytep gamma_table, unsigned int *colors) -{ - /* - * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white - * 2-bit: entry 0: transparent-green - * entry 1: 40%-red - * entry 2: 80%-blue - * entry 3: opaque-white - * 4-bit: the 16 combinations of the 2-bit case - * 8-bit: the 256 combinations of the 4-bit case - */ - switch (colors[0]) - { - default: - fprintf(stderr, "makepng: --colors=...: invalid count %u\n", - colors[0]); - exit(1); - - case 1: - set_color(palette+0, trans+0, colors[1], colors[1], colors[1], 255, - gamma_table); - return 1; - - case 2: - set_color(palette+0, trans+0, colors[1], colors[1], colors[1], - colors[2], gamma_table); - return 1; - - case 3: - set_color(palette+0, trans+0, colors[1], colors[2], colors[3], 255, - gamma_table); - return 1; - - case 4: - set_color(palette+0, trans+0, colors[1], colors[2], colors[3], - colors[4], gamma_table); - return 1; - - case 0: - if (bit_depth == 1) - { - set_color(palette+0, trans+0, 255, 0, 0, 0, gamma_table); - set_color(palette+1, trans+1, 255, 255, 255, 255, gamma_table); - return 2; - } - - else - { - unsigned int size = 1U << (bit_depth/2); /* 2, 4 or 16 */ - unsigned int x, y, ip; - - for (x=0; x<size; ++x) for (y=0; y<size; ++y) - { - ip = x + (size * y); - - /* size is at most 16, so the scaled value below fits in 16 bits - */ -# define interp(pos, c1, c2) ((pos * c1) + ((size-pos) * c2)) -# define xyinterp(x, y, c1, c2, c3, c4) (((size * size / 2) +\ - (interp(x, c1, c2) * y + (size-y) * interp(x, c3, c4))) /\ - (size*size)) - - set_color(palette+ip, trans+ip, - /* color: green, red,blue,white */ - xyinterp(x, y, 0, 255, 0, 255), - xyinterp(x, y, 255, 0, 0, 255), - xyinterp(x, y, 0, 0, 255, 255), - /* alpha: 0, 102, 204, 255) */ - xyinterp(x, y, 0, 102, 204, 255), - gamma_table); - } - - return ip+1; - } - } -} - -static void -set_value(png_bytep row, size_t rowbytes, png_uint_32 x, unsigned int bit_depth, - png_uint_32 value, png_const_bytep gamma_table, double conv) -{ - unsigned int mask = (1U << bit_depth)-1; - - x *= bit_depth; /* Maximum x is 4*1024, maximum bit_depth is 16 */ - - if (value <= mask) - { - png_uint_32 offset = x >> 3; - - if (offset < rowbytes && (bit_depth < 16 || offset+1 < rowbytes)) - { - row += offset; - - switch (bit_depth) - { - case 1: - case 2: - case 4: - /* Don't gamma correct - values get smashed */ - { - unsigned int shift = (8 - bit_depth) - (x & 0x7U); - - mask <<= shift; - value = (value << shift) & mask; - *row = (png_byte)((*row & ~mask) | value); - } - return; - - default: - fprintf(stderr, "makepng: bad bit depth (internal error)\n"); - exit(1); - - case 16: - value = (unsigned int)floor(65535*pow(value/65535.,conv)+.5); - *row++ = (png_byte)(value >> 8); - *row = (png_byte)value; - return; - - case 8: - *row = gamma_table[value]; - return; - } - } - - else - { - fprintf(stderr, "makepng: row buffer overflow (internal error)\n"); - exit(1); - } - } - - else - { - fprintf(stderr, "makepng: component overflow (internal error)\n"); - exit(1); - } -} - -static void -generate_row(png_bytep row, size_t rowbytes, unsigned int y, int color_type, - int bit_depth, png_const_bytep gamma_table, double conv, - unsigned int *colors) -{ - png_uint_32 size_max = image_size_of_type(color_type, bit_depth, colors)-1; - png_uint_32 depth_max = (1U << bit_depth)-1; /* up to 65536 */ - - if (colors[0] == 0) switch (channels_of_type(color_type)) - { - /* 1 channel: a square image with a diamond, the least luminous colors are on - * the edge of the image, the most luminous in the center. - */ - case 1: - { - png_uint_32 x; - png_uint_32 base = 2*size_max - abs(2*y-size_max); - - for (x=0; x<=size_max; ++x) - { - png_uint_32 luma = base - abs(2*x-size_max); - - /* 'luma' is now in the range 0..2*size_max, we need - * 0..depth_max - */ - luma = (luma*depth_max + size_max) / (2*size_max); - set_value(row, rowbytes, x, bit_depth, luma, gamma_table, conv); - } - } - break; - - /* 2 channels: the color channel increases in luminosity from top to bottom, - * the alpha channel increases in opacity from left to right. - */ - case 2: - { - png_uint_32 alpha = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 2*x, bit_depth, - (depth_max * x * 2 + size_max) / (2 * size_max), gamma_table, - conv); - set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, - conv); - } - } - break; - - /* 3 channels: linear combinations of, from the top-left corner clockwise, - * black, green, white, red. - */ - case 3: - { - /* x0: the black->red scale (the value of the red component) at the - * start of the row (blue and green are 0). - * x1: the green->white scale (the value of the red and blue - * components at the end of the row; green is depth_max). - */ - png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - /* Interpolate x/depth_max from start to end: - * - * start end difference - * red: Y Y 0 - * green: 0 depth_max depth_max - * blue: 0 Y Y - */ - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 3*x+0, bit_depth, /* red */ Y, - gamma_table, conv); - set_value(row, rowbytes, 3*x+1, bit_depth, /* green */ - (depth_max * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 3*x+2, bit_depth, /* blue */ - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - } - } - break; - - /* 4 channels: linear combinations of, from the top-left corner clockwise, - * transparent, red, green, blue. - */ - case 4: - { - /* x0: the transparent->blue scale (the value of the blue and alpha - * components) at the start of the row (red and green are 0). - * x1: the red->green scale (the value of the red and green - * components at the end of the row; blue is 0 and alpha is - * depth_max). - */ - png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - /* Interpolate x/depth_max from start to end: - * - * start end difference - * red: 0 depth_max-Y depth_max-Y - * green: 0 Y Y - * blue: Y 0 -Y - * alpha: Y depth_max depth_max-Y - */ - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 4*x+0, bit_depth, /* red */ - ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+1, bit_depth, /* green */ - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+2, bit_depth, /* blue */ - Y - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+3, bit_depth, /* alpha */ - Y + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - } - } - break; - - default: - fprintf(stderr, "makepng: internal bad channel count\n"); - exit(2); - } - - else if (color_type & PNG_COLOR_MASK_PALETTE) - { - /* Palette with fixed color: the image rows are all 0 and the image width - * is 16. - */ - memset(row, 0, rowbytes); - } - - else if (colors[0] == channels_of_type(color_type)) - switch (channels_of_type(color_type)) - { - case 1: - { - const png_uint_32 luma = colors[1]; - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - set_value(row, rowbytes, x, bit_depth, luma, gamma_table, - conv); - } - break; - - case 2: - { - const png_uint_32 luma = colors[1]; - const png_uint_32 alpha = colors[2]; - png_uint_32 x; - - for (x=0; x<size_max; ++x) - { - set_value(row, rowbytes, 2*x, bit_depth, luma, gamma_table, - conv); - set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, - conv); - } - } - break; - - case 3: - { - const png_uint_32 red = colors[1]; - const png_uint_32 green = colors[2]; - const png_uint_32 blue = colors[3]; - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 3*x+0, bit_depth, red, gamma_table, - conv); - set_value(row, rowbytes, 3*x+1, bit_depth, green, gamma_table, - conv); - set_value(row, rowbytes, 3*x+2, bit_depth, blue, gamma_table, - conv); - } - } - break; - - case 4: - { - const png_uint_32 red = colors[1]; - const png_uint_32 green = colors[2]; - const png_uint_32 blue = colors[3]; - const png_uint_32 alpha = colors[4]; - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 4*x+0, bit_depth, red, gamma_table, - conv); - set_value(row, rowbytes, 4*x+1, bit_depth, green, gamma_table, - conv); - set_value(row, rowbytes, 4*x+2, bit_depth, blue, gamma_table, - conv); - set_value(row, rowbytes, 4*x+3, bit_depth, alpha, gamma_table, - conv); - } - } - break; - - default: - fprintf(stderr, "makepng: internal bad channel count\n"); - exit(2); - } - - else - { - fprintf(stderr, - "makepng: --color: count(%u) does not match channels(%u)\n", - colors[0], channels_of_type(color_type)); - exit(1); - } -} - - -static void PNGCBAPI -makepng_warning(png_structp png_ptr, png_const_charp message) -{ - const char **ep = png_get_error_ptr(png_ptr); - const char *name; - - if (ep != NULL && *ep != NULL) - name = *ep; - - else - name = "makepng"; - - fprintf(stderr, "%s: warning: %s\n", name, message); -} - -static void PNGCBAPI -makepng_error(png_structp png_ptr, png_const_charp message) -{ - makepng_warning(png_ptr, message); - png_longjmp(png_ptr, 1); -} - -static int /* 0 on success, else an error code */ -write_png(const char **name, FILE *fp, int color_type, int bit_depth, - volatile png_fixed_point gamma, chunk_insert * volatile insert, - unsigned int filters, unsigned int *colors) -{ - png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, - name, makepng_error, makepng_warning); - volatile png_infop info_ptr = NULL; - volatile png_bytep row = NULL; - - if (png_ptr == NULL) - { - fprintf(stderr, "makepng: OOM allocating write structure\n"); - return 1; - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_structp nv_ptr = png_ptr; - png_infop nv_info = info_ptr; - - png_ptr = NULL; - info_ptr = NULL; - png_destroy_write_struct(&nv_ptr, &nv_info); - if (row != NULL) free(row); - return 1; - } - - /* Allow benign errors so that we can write PNGs with errors */ - png_set_benign_errors(png_ptr, 1/*allowed*/); - png_init_io(png_ptr, fp); - - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - png_error(png_ptr, "OOM allocating info structure"); - - { - unsigned int size = image_size_of_type(color_type, bit_depth, colors); - png_fixed_point real_gamma = 45455; /* For sRGB */ - png_byte gamma_table[256]; - double conv; - - /* This function uses the libpng values used on read to carry extra - * information about the gamma: - */ - if (gamma == PNG_GAMMA_MAC_18) - gamma = 65909; - - else if (gamma > 0 && gamma < 1000) - gamma = PNG_FP_1; - - if (gamma > 0) - real_gamma = gamma; - - { - unsigned int i; - - if (real_gamma == 45455) for (i=0; i<256; ++i) - { - gamma_table[i] = (png_byte)i; - conv = 1.; - } - - else - { - /* Convert 'i' from sRGB (45455) to real_gamma, this makes - * the images look the same regardless of the gAMA chunk. - */ - conv = real_gamma; - conv /= 45455; - - gamma_table[0] = 0; - - for (i=1; i<255; ++i) - gamma_table[i] = (png_byte)floor(pow(i/255.,conv) * 255 + .5); - - gamma_table[255] = 255; - } - } - - png_set_IHDR(png_ptr, info_ptr, size, size, bit_depth, color_type, - PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - if (color_type & PNG_COLOR_MASK_PALETTE) - { - int npalette; - png_color palette[256]; - png_byte trans[256]; - - npalette = generate_palette(palette, trans, bit_depth, gamma_table, - colors); - png_set_PLTE(png_ptr, info_ptr, palette, npalette); - png_set_tRNS(png_ptr, info_ptr, trans, npalette-1, - NULL/*transparent color*/); - - /* Reset gamma_table to prevent the image rows being changed */ - for (npalette=0; npalette<256; ++npalette) - gamma_table[npalette] = (png_byte)npalette; - } - - if (gamma == PNG_DEFAULT_sRGB) - png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_ABSOLUTE); - - else if (gamma > 0) /* Else don't set color space information */ - { - png_set_gAMA_fixed(png_ptr, info_ptr, real_gamma); - - /* Just use the sRGB values here. */ - png_set_cHRM_fixed(png_ptr, info_ptr, - /* color x y */ - /* white */ 31270, 32900, - /* red */ 64000, 33000, - /* green */ 30000, 60000, - /* blue */ 15000, 6000 - ); - } - - /* Insert extra information. */ - while (insert != NULL) - { - insert->insert(png_ptr, info_ptr, insert->nparams, insert->parameters); - insert = insert->next; - } - - /* Write the file header. */ - png_write_info(png_ptr, info_ptr); - - /* Restrict the filters */ - png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, filters); - - { - int passes = png_set_interlace_handling(png_ptr); - int pass; - png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); - - row = malloc(rowbytes); - - if (row == NULL) - png_error(png_ptr, "OOM allocating row buffer"); - - for (pass = 0; pass < passes; ++pass) - { - unsigned int y; - - for (y=0; y<size; ++y) - { - generate_row(row, rowbytes, y, color_type, bit_depth, - gamma_table, conv, colors); - png_write_row(png_ptr, row); - } - } - } - } - - /* Finish writing the file. */ - png_write_end(png_ptr, info_ptr); - - { - png_structp nv_ptr = png_ptr; - png_infop nv_info = info_ptr; - - png_ptr = NULL; - info_ptr = NULL; - png_destroy_write_struct(&nv_ptr, &nv_info); - } - free(row); - return 0; -} - - -static size_t -load_file(png_const_charp name, png_bytepp result) -{ - FILE *fp = tmpfile(); - - if (fp != NULL) - { - FILE *ip = fopen(name, "rb"); - - if (ip != NULL) - { - size_t total = 0; - int ch; - - for (;;) - { - ch = getc(ip); - if (ch == EOF) break; - putc(ch, fp); - ++total; - } - - if (ferror(ip)) - { - perror(name); - fprintf(stderr, "%s: read error\n", name); - (void)fclose(ip); - } - - else - { - (void)fclose(ip); - - if (ferror(fp)) - { - perror("temporary file"); - fprintf(stderr, "temporary file write error\n"); - } - - else - { - rewind(fp); - - if (total > 0) - { - /* Round up to a multiple of 4 here to allow an iCCP profile - * to be padded to a 4x boundary. - */ - png_bytep data = malloc((total+3)&~3); - - if (data != NULL) - { - size_t new_size = 0; - - for (;;) - { - ch = getc(fp); - if (ch == EOF) break; - data[new_size++] = (png_byte)ch; - } - - if (ferror(fp) || new_size != total) - { - perror("temporary file"); - fprintf(stderr, "temporary file read error\n"); - free(data); - } - - else - { - (void)fclose(fp); - *result = data; - return total; - } - } - - else - fprintf(stderr, "%s: out of memory loading file\n", name); - } - - else - fprintf(stderr, "%s: empty file\n", name); - } - } - } - - else - { - perror(name); - fprintf(stderr, "%s: open failed\n", name); - } - - fclose(fp); - } - - else - fprintf(stderr, "makepng: %s: could not open temporary file\n", name); - - exit(1); - return 0; -} - -static png_size_t -load_fake(png_charp param, png_bytepp profile) -{ - char *endptr = NULL; - unsigned long long int size = strtoull(param, &endptr, 0/*base*/); - - /* The 'fake' format is <number>*[string] */ - if (endptr != NULL && *endptr == '*') - { - size_t len = strlen(++endptr); - size_t result = (size_t)size; - - if (len == 0) len = 1; /* capture the terminating '\0' */ - - /* Now repeat that string to fill 'size' bytes. */ - if (result == size && (*profile = malloc(result)) != NULL) - { - png_bytep out = *profile; - - if (len == 1) - memset(out, *endptr, result); - - else - { - while (size >= len) - { - memcpy(out, endptr, len); - out += len; - size -= len; - } - memcpy(out, endptr, size); - } - - return result; - } - - else - { - fprintf(stderr, "%s: size exceeds system limits\n", param); - exit(1); - } - } - - return 0; -} - -static void -check_param_count(int nparams, int expect) -{ - if (nparams != expect) - { - fprintf(stderr, "bad parameter count (internal error)\n"); - exit(1); - } -} - -static void -insert_iCCP(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_bytep profile = NULL; - png_uint_32 proflen = 0; - int result; - - check_param_count(nparams, 2); - - switch (params[1][0]) - { - case '<': - { - png_size_t filelen = load_file(params[1]+1, &profile); - if (filelen > 0xfffffffc) /* Maximum profile length */ - { - fprintf(stderr, "%s: file too long (%lu) for an ICC profile\n", - params[1]+1, (unsigned long)filelen); - exit(1); - } - - proflen = (png_uint_32)filelen; - } - break; - - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - { - png_size_t fake_len = load_fake(params[1], &profile); - - if (fake_len > 0) /* else a simple parameter */ - { - if (fake_len > 0xffffffff) /* Maximum profile length */ - { - fprintf(stderr, - "%s: fake data too long (%lu) for an ICC profile\n", - params[1], (unsigned long)fake_len); - exit(1); - } - proflen = (png_uint_32)(fake_len & ~3U); - /* Always fix up the profile length. */ - png_save_uint_32(profile, proflen); - break; - } - } - - default: - fprintf(stderr, "--insert iCCP \"%s\": unrecognized\n", params[1]); - fprintf(stderr, " use '<' to read a file: \"<filename\"\n"); - exit(1); - } - - result = 1; - - if (proflen & 3) - { - fprintf(stderr, - "makepng: --insert iCCP %s: profile length made a multiple of 4\n", - params[1]); - - /* load_file allocates extra space for this padding, the ICC spec requires - * padding with zero bytes. - */ - while (proflen & 3) - profile[proflen++] = 0; - } - - if (profile != NULL && proflen > 3) - { - png_uint_32 prof_header = png_get_uint_32(profile); - - if (prof_header != proflen) - { - fprintf(stderr, "--insert iCCP %s: profile length field wrong:\n", - params[1]); - fprintf(stderr, " actual %lu, recorded value %lu (corrected)\n", - (unsigned long)proflen, (unsigned long)prof_header); - png_save_uint_32(profile, proflen); - } - } - - if (result && profile != NULL && proflen >=4) - png_set_iCCP(png_ptr, info_ptr, params[0], PNG_COMPRESSION_TYPE_BASE, - profile, proflen); - - if (profile) - free(profile); - - if (!result) - exit(1); -} - -static void -clear_text(png_text *text, png_charp keyword) -{ - text->compression = -1; /* none */ - text->key = keyword; - text->text = NULL; - text->text_length = 0; /* libpng calculates this */ - text->itxt_length = 0; /* libpng calculates this */ - text->lang = NULL; - text->lang_key = NULL; -} - -static void -set_text(png_structp png_ptr, png_infop info_ptr, png_textp text, - png_charp param) -{ - switch (param[0]) - { - case '<': - { - png_bytep file = NULL; - - text->text_length = load_file(param+1, &file); - text->text = (png_charp)file; - } - break; - - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - { - png_bytep data = NULL; - png_size_t fake_len = load_fake(param, &data); - - if (fake_len > 0) /* else a simple parameter */ - { - text->text_length = fake_len; - text->text = (png_charp)data; - break; - } - } - - default: - text->text = param; - break; - } - - png_set_text(png_ptr, info_ptr, text, 1); - - if (text->text != param) - free(text->text); -} - -static void -insert_tEXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 2); - clear_text(&text, params[0]); - set_text(png_ptr, info_ptr, &text, params[1]); -} - -static void -insert_zTXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 2); - clear_text(&text, params[0]); - text.compression = 0; /* deflate */ - set_text(png_ptr, info_ptr, &text, params[1]); -} - -static void -insert_iTXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 4); - clear_text(&text, params[0]); - text.compression = 2; /* iTXt + deflate */ - text.lang = params[1];/* language tag */ - text.lang_key = params[2]; /* translated keyword */ - set_text(png_ptr, info_ptr, &text, params[3]); -} - -static void -insert_hIST(png_structp png_ptr, png_infop info_ptr, int nparams, png_charpp params) -{ - int i; - png_uint_16 freq[256]; - - /* libpng takes the count from the PLTE count; we don't check it here but we - * do set the array to 0 for unspecified entries. - */ - memset(freq, 0, sizeof freq); - for (i=0; i<nparams; ++i) - { - char *endptr = NULL; - unsigned long int l = strtoul(params[i], &endptr, 0/*base*/); - - if (params[i][0] && *endptr == 0 && l <= 65535) - freq[i] = (png_uint_16)l; - - else - { - fprintf(stderr, "hIST[%d]: %s: invalid frequency\n", i, params[i]); - exit(1); - } - } - - png_set_hIST(png_ptr, info_ptr, freq); -} - -#if 0 -static void -insert_sPLT(png_structp png_ptr, png_infop info_ptr, int nparams, png_charpp params) -{ - fprintf(stderr, "insert sPLT: NYI\n"); -} -#endif - -static int -find_parameters(png_const_charp what, png_charp param, png_charp *list, - int nparams) -{ - /* Parameters are separated by '\n' or ':' characters, up to nparams are - * accepted (more is an error) and the number found is returned. - */ - int i; - for (i=0; *param && i<nparams; ++i) - { - list[i] = param; - while (*++param) if (*param == '\n' || *param == ':') - { - *param++ = 0; /* Terminate last parameter */ - break; /* And start a new one. */ - } - } - - if (*param) - { - fprintf(stderr, "--insert %s: too many parameters (%s)\n", what, param); - exit(1); - } - - list[i] = NULL; /* terminates list */ - return i; /* number of parameters filled in */ -} - -static void -bad_parameter_count(png_const_charp what, int nparams) -{ - fprintf(stderr, "--insert %s: bad parameter count %d\n", what, nparams); - exit(1); -} - -static chunk_insert * -make_insert(png_const_charp what, - void (*insert)(png_structp, png_infop, int, png_charpp), - int nparams, png_charpp list) -{ - int i; - chunk_insert *cip; - - cip = malloc(offsetof(chunk_insert,parameters) + - nparams * sizeof (png_charp)); - - if (cip == NULL) - { - fprintf(stderr, "--insert %s: out of memory allocating %d parameters\n", - what, nparams); - exit(1); - } - - cip->next = NULL; - cip->insert = insert; - cip->nparams = nparams; - for (i=0; i<nparams; ++i) - cip->parameters[i] = list[i]; - - return cip; -} - -static chunk_insert * -find_insert(png_const_charp what, png_charp param) -{ - png_uint_32 chunk = 0; - png_charp parameter_list[1024]; - int i, nparams; - - /* Assemble the chunk name */ - for (i=0; i<4; ++i) - { - char ch = what[i]; - - if ((ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122)) - chunk = (chunk << 8) + what[i]; - - else - break; - } - - if (i < 4 || what[4] != 0) - { - fprintf(stderr, "makepng --insert \"%s\": invalid chunk name\n", what); - exit(1); - } - - /* Assemble the parameter list. */ - nparams = find_parameters(what, param, parameter_list, 1024); - -# define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) - - switch (chunk) - { - case CHUNK(105,67,67,80): /* iCCP */ - if (nparams == 2) - return make_insert(what, insert_iCCP, nparams, parameter_list); - break; - - case CHUNK(116,69,88,116): /* tEXt */ - if (nparams == 2) - return make_insert(what, insert_tEXt, nparams, parameter_list); - break; - - case CHUNK(122,84,88,116): /* zTXt */ - if (nparams == 2) - return make_insert(what, insert_zTXt, nparams, parameter_list); - break; - - case CHUNK(105,84,88,116): /* iTXt */ - if (nparams == 4) - return make_insert(what, insert_iTXt, nparams, parameter_list); - break; - - case CHUNK(104,73,83,84): /* hIST */ - if (nparams <= 256) - return make_insert(what, insert_hIST, nparams, parameter_list); - break; - -#if 0 - case CHUNK(115,80,76,84): /* sPLT */ - return make_insert(what, insert_sPLT, nparams, parameter_list); -#endif - - default: - fprintf(stderr, "makepng --insert \"%s\": unrecognized chunk name\n", - what); - exit(1); - } - - bad_parameter_count(what, nparams); - return NULL; -} - -/* This is a not-very-good parser for a sequence of numbers (including 0). It - * doesn't accept some apparently valid things, but it accepts all the sensible - * combinations. - */ -static void -parse_color(char *arg, unsigned int *colors) -{ - unsigned int ncolors = 0; - - while (*arg && ncolors < 4) - { - char *ep = arg; - - unsigned long ul = strtoul(arg, &ep, 0); - - if (ul > 65535) - { - fprintf(stderr, "makepng --color=...'%s': too big\n", arg); - exit(1); - } - - if (ep == arg) - { - fprintf(stderr, "makepng --color=...'%s': not a valid color\n", arg); - exit(1); - } - - if (*ep) ++ep; /* skip a separator */ - arg = ep; - - colors[++ncolors] = (unsigned int)ul; /* checked above */ - } - - if (*arg) - { - fprintf(stderr, "makepng --color=...'%s': too many values\n", arg); - exit(1); - } - - *colors = ncolors; -} - -int -main(int argc, char **argv) -{ - FILE *fp = stdout; - const char *file_name = NULL; - int color_type = 8; /* invalid */ - int bit_depth = 32; /* invalid */ - unsigned int colors[5]; - unsigned int filters = PNG_ALL_FILTERS; - png_fixed_point gamma = 0; /* not set */ - chunk_insert *head_insert = NULL; - chunk_insert **insert_ptr = &head_insert; - - memset(colors, 0, sizeof colors); - - while (--argc > 0) - { - char *arg = *++argv; - - if (strcmp(arg, "--sRGB") == 0) - { - gamma = PNG_DEFAULT_sRGB; - continue; - } - - if (strcmp(arg, "--linear") == 0) - { - gamma = PNG_FP_1; - continue; - } - - if (strcmp(arg, "--1.8") == 0) - { - gamma = PNG_GAMMA_MAC_18; - continue; - } - - if (strcmp(arg, "--nofilters") == 0) - { - filters = PNG_FILTER_NONE; - continue; - } - - if (strncmp(arg, "--color=", 8) == 0) - { - parse_color(arg+8, colors); - continue; - } - - if (argc >= 3 && strcmp(arg, "--insert") == 0) - { - png_const_charp what = *++argv; - png_charp param = *++argv; - chunk_insert *new_insert; - - argc -= 2; - - new_insert = find_insert(what, param); - - if (new_insert != NULL) - { - *insert_ptr = new_insert; - insert_ptr = &new_insert->next; - } - - continue; - } - - if (arg[0] == '-') - { - fprintf(stderr, "makepng: %s: invalid option\n", arg); - exit(1); - } - - if (strcmp(arg, "palette") == 0) - { - color_type = PNG_COLOR_TYPE_PALETTE; - continue; - } - - if (strncmp(arg, "gray", 4) == 0) - { - if (arg[4] == 0) - { - color_type = PNG_COLOR_TYPE_GRAY; - continue; - } - - else if (strcmp(arg+4, "a") == 0 || - strcmp(arg+4, "alpha") == 0 || - strcmp(arg+4, "-alpha") == 0) - { - color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - continue; - } - } - - if (strncmp(arg, "rgb", 3) == 0) - { - if (arg[3] == 0) - { - color_type = PNG_COLOR_TYPE_RGB; - continue; - } - - else if (strcmp(arg+3, "a") == 0 || - strcmp(arg+3, "alpha") == 0 || - strcmp(arg+3, "-alpha") == 0) - { - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - continue; - } - } - - if (color_type == 8 && isdigit(arg[0])) - { - color_type = atoi(arg); - if (color_type < 0 || color_type > 6 || color_type == 1 || - color_type == 5) - { - fprintf(stderr, "makepng: %s: not a valid color type\n", arg); - exit(1); - } - - continue; - } - - if (bit_depth == 32 && isdigit(arg[0])) - { - bit_depth = atoi(arg); - if (bit_depth <= 0 || bit_depth > 16 || - (bit_depth & -bit_depth) != bit_depth) - { - fprintf(stderr, "makepng: %s: not a valid bit depth\n", arg); - exit(1); - } - - continue; - } - - if (argc == 1) /* It's the file name */ - { - fp = fopen(arg, "wb"); - if (fp == NULL) - { - fprintf(stderr, "%s: %s: could not open\n", arg, strerror(errno)); - exit(1); - } - - file_name = arg; - continue; - } - - fprintf(stderr, "makepng: %s: unknown argument\n", arg); - exit(1); - } /* argument while loop */ - - if (color_type == 8 || bit_depth == 32) - { - fprintf(stderr, "usage: makepng [--sRGB|--linear|--1.8] " - "[--color=...] color-type bit-depth [file-name]\n" - " Make a test PNG file, by default writes to stdout.\n"); - exit(1); - } - - /* Check the colors */ - { - const unsigned int lim = (color_type == PNG_COLOR_TYPE_PALETTE ? 255U : - (1U<<bit_depth)-1); - unsigned int i; - - for (i=1; i<=colors[0]; ++i) - if (colors[i] > lim) - { - fprintf(stderr, "makepng: --color=...: %u out of range [0..%u]\n", - colors[i], lim); - exit(1); - } - } - - /* Restrict the filters for more speed to those we know are used for the - * generated images. - */ - if (filters == PNG_ALL_FILTERS) - { - if ((color_type & PNG_COLOR_MASK_PALETTE) != 0 || bit_depth < 8) - filters = PNG_FILTER_NONE; - - else if (color_type & PNG_COLOR_MASK_COLOR) /* rgb */ - { - if (bit_depth == 8) - filters &= ~(PNG_FILTER_NONE | PNG_FILTER_AVG); - - else - filters = PNG_FILTER_SUB | PNG_FILTER_PAETH; - } - - else /* gray 8 or 16-bit */ - filters &= ~PNG_FILTER_NONE; - } - - { - int ret = write_png(&file_name, fp, color_type, bit_depth, gamma, - head_insert, filters, colors); - - if (ret != 0 && file_name != NULL) - remove(file_name); - - return ret; - } -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngimage.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngimage.c deleted file mode 100644 index dccfbce127c..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngimage.c +++ /dev/null @@ -1,1652 +0,0 @@ -/* pngimage.c - * - * Copyright (c) 2014 John Cunningham Bowler - * - * Last changed in libpng 1.6.10 [March 6, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Test the png_read_png and png_write_png interfaces. Given a PNG file load it - * using png_read_png and then write with png_write_png. Test all possible - * transforms. - */ -#include <stdarg.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include <stdio.h> -#include <assert.h> - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include <config.h> -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -#ifndef PNG_SETJMP_SUPPORTED -# include <setjmp.h> /* because png.h did *not* include this */ -#endif - -#if defined(PNG_INFO_IMAGE_SUPPORTED) && defined(PNG_SEQUENTIAL_READ_SUPPORTED) -/* If a transform is valid on both read and write this implies that if the - * transform is applied to read it must also be applied on write to produce - * meaningful data. This is because these transforms when performed on read - * produce data with a memory format that does not correspond to a PNG format. - * - * Most of these transforms are invertible; after applying the transform on - * write the result is the original PNG data that would have would have been - * read if no transform were applied. - * - * The exception is _SHIFT, which destroys the low order bits marked as not - * significant in a PNG with the sBIT chunk. - * - * The following table lists, for each transform, the conditions under which it - * is expected to do anything. Conditions are defined as follows: - * - * 1) Color mask bits required - simply a mask to AND with color_type; one of - * these must be present for the transform to fire, except that 0 means - * 'always'. - * 2) Color mask bits which must be absent - another mask - none of these must - * be present. - * 3) Bit depths - a mask of component bit depths for the transform to fire. - * 4) 'read' - the transform works in png_read_png. - * 5) 'write' - the transform works in png_write_png. - * 6) PNG_INFO_chunk; a mask of the chunks that must be present for the - * transform to fire. All must be present - the requirement is that - * png_get_valid() & mask == mask, so if mask is 0 there is no requirement. - * - * The condition refers to the original image state - if multiple transforms are - * used together it is possible to cause a transform that wouldn't fire on the - * original image to fire. - */ -static struct transform_info -{ - const char *name; - int transform; - png_uint_32 valid_chunks; -# define CHUNK_NONE 0 -# define CHUNK_sBIT PNG_INFO_sBIT -# define CHUNK_tRNS PNG_INFO_tRNS - png_byte color_mask_required; - png_byte color_mask_absent; -# define COLOR_MASK_X 0 -# define COLOR_MASK_P PNG_COLOR_MASK_PALETTE -# define COLOR_MASK_C PNG_COLOR_MASK_COLOR -# define COLOR_MASK_A PNG_COLOR_MASK_ALPHA -# define COLOR_MASK_ALL (PALETTE+COLOR+ALPHA) /* absent = gray, no alpha */ - png_byte bit_depths; -# define BD_ALL (1 + 2 + 4 + 8 + 16) -# define BD_PAL (1 + 2 + 4 + 8) -# define BD_LOW (1 + 2 + 4) -# define BD_16 16 -# define BD_TRUE (8+16) /* i.e. true-color depths */ - png_byte when; -# define TRANSFORM_R 1 -# define TRANSFORM_W 2 -# define TRANSFORM_RW 3 - png_byte tested; /* the transform was tested somewhere */ -} transform_info[] = -{ - /* List ALL the PNG_TRANSFORM_ macros here. Check for support using the READ - * macros; even if the transform is supported on write it cannot be tested - * without the read support. - */ -# define T(name,chunk,cm_required,cm_absent,bd,when)\ - { #name, PNG_TRANSFORM_ ## name, CHUNK_ ## chunk,\ - COLOR_MASK_ ## cm_required, COLOR_MASK_ ## cm_absent, BD_ ## bd,\ - TRANSFORM_ ## when, 0/*!tested*/ } - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED - T(STRIP_16, NONE, X, X, 16, R), - /* drops the bottom 8 bits when bit depth is 16 */ -#endif -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - T(STRIP_ALPHA, NONE, A, X, ALL, R), - /* removes the alpha channel if present */ -#endif -#ifdef PNG_WRITE_PACK_SUPPORTED -# define TRANSFORM_RW_PACK TRANSFORM_RW -#else -# define TRANSFORM_RW_PACK TRANSFORM_R -#endif -#ifdef PNG_READ_PACK_SUPPORTED - T(PACKING, NONE, X, X, LOW, RW_PACK), - /* unpacks low-bit-depth components into 1 byte per component on read, - * reverses this on write. - */ -#endif -#ifdef PNG_WRITE_PACKSWAP_SUPPORTED -# define TRANSFORM_RW_PACKSWAP TRANSFORM_RW -#else -# define TRANSFORM_RW_PACKSWAP TRANSFORM_R -#endif -#ifdef PNG_READ_PACKSWAP_SUPPORTED - T(PACKSWAP, NONE, X, X, LOW, RW_PACKSWAP), - /* reverses the order of low-bit-depth components packed into a byte */ -#endif -#ifdef PNG_READ_EXPAND_SUPPORTED - T(EXPAND, NONE, P, X, ALL, R), - /* expands PLTE PNG files to RGB (no tRNS) or RGBA (tRNS) * - * Note that the 'EXPAND' transform does lots of different things: */ - T(EXPAND, NONE, X, C, ALL, R), - /* expands grayscale PNG files to RGB, or RGBA */ - T(EXPAND, tRNS, X, A, ALL, R), - /* expands the tRNS chunk in files without alpha */ -#endif -#ifdef PNG_WRITE_INVERT_SUPPORTED -# define TRANSFORM_RW_INVERT TRANSFORM_RW -#else -# define TRANSFORM_RW_INVERT TRANSFORM_R -#endif -#ifdef PNG_READ_INVERT_SUPPORTED - T(INVERT_MONO, NONE, X, C, ALL, RW_INVERT), - /* converts gray-scale components to 1..0 from 0..1 */ -#endif -#ifdef PNG_WRITE_SHIFT_SUPPORTED -# define TRANSFORM_RW_SHIFT TRANSFORM_RW -#else -# define TRANSFORM_RW_SHIFT TRANSFORM_R -#endif -#ifdef PNG_READ_SHIFT_SUPPORTED - T(SHIFT, sBIT, X, X, ALL, RW_SHIFT), - /* reduces component values to the original range based on the sBIT chunk, - * this is only partially reversible - the low bits are lost and cannot be - * recovered on write. In fact write code replicates the bits to generate - * new low-order bits. - */ -#endif -#ifdef PNG_WRITE_BGR_SUPPORTED -# define TRANSFORM_RW_BGR TRANSFORM_RW -#else -# define TRANSFORM_RW_BGR TRANSFORM_R -#endif -#ifdef PNG_READ_BGR_SUPPORTED - T(BGR, NONE, C, P, TRUE, RW_BGR), - /* reverses the rgb component values of true-color pixels */ -#endif -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -# define TRANSFORM_RW_SWAP_ALPHA TRANSFORM_RW -#else -# define TRANSFORM_RW_SWAP_ALPHA TRANSFORM_R -#endif -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED - T(SWAP_ALPHA, NONE, A, X, TRUE, RW_SWAP_ALPHA), - /* swaps the alpha channel of RGBA or GA pixels to the front - ARGB or - * AG, on write reverses the process. - */ -#endif -#ifdef PNG_WRITE_SWAP_SUPPORTED -# define TRANSFORM_RW_SWAP TRANSFORM_RW -#else -# define TRANSFORM_RW_SWAP TRANSFORM_R -#endif -#ifdef PNG_READ_SWAP_SUPPORTED - T(SWAP_ENDIAN, NONE, X, P, 16, RW_SWAP), - /* byte-swaps 16-bit component values */ -#endif -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -# define TRANSFORM_RW_INVERT_ALPHA TRANSFORM_RW -#else -# define TRANSFORM_RW_INVERT_ALPHA TRANSFORM_R -#endif -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - T(INVERT_ALPHA, NONE, A, X, TRUE, RW_INVERT_ALPHA), - /* converts an alpha channel from 0..1 to 1..0 */ -#endif -#ifdef PNG_WRITE_FILLER_SUPPORTED - T(STRIP_FILLER_BEFORE, NONE, A, P, TRUE, W), /* 'A' for a filler! */ - /* on write skips a leading filler channel; testing requires data with a - * filler channel so this is produced from RGBA or GA images by removing - * the 'alpha' flag from the color type in place. - */ - T(STRIP_FILLER_AFTER, NONE, A, P, TRUE, W), - /* on write strips a trailing filler channel */ -#endif -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - T(GRAY_TO_RGB, NONE, X, C, ALL, R), - /* expands grayscale images to RGB, also causes the palette part of - * 'EXPAND' to happen. Low bit depth grayscale images are expanded to - * 8-bits per component and no attempt is made to convert the image to a - * palette image. While this transform is partially reversible - * png_write_png does not currently support this. - */ - T(GRAY_TO_RGB, NONE, P, X, ALL, R), - /* The 'palette' side effect mentioned above; a bit bogus but this is the - * way the libpng code works. - */ -#endif -#ifdef PNG_READ_EXPAND_16_SUPPORTED - T(EXPAND_16, NONE, X, X, PAL, R), - /* expands images to 16-bits per component, as a side effect expands - * palette images to RGB and expands the tRNS chunk if present, so it can - * modify 16-bit per component images as well: - */ - T(EXPAND_16, tRNS, X, A, 16, R), - /* side effect of EXPAND_16 - expands the tRNS chunk in an RGB or G 16-bit - * image. - */ -#endif -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - T(SCALE_16, NONE, X, X, 16, R) - /* scales 16-bit components to 8-bits. */ -#endif - -#undef T -}; - -#define ARRAY_SIZE(a) ((sizeof a)/(sizeof a[0])) -#define TTABLE_SIZE ARRAY_SIZE(transform_info) - -/* Some combinations of options that should be reversible are not; these cases - * are bugs. - */ -static int known_bad_combos[][2] = -{ - /* problem, antidote */ - { PNG_TRANSFORM_SHIFT | PNG_TRANSFORM_INVERT_ALPHA, 0/*antidote*/ } -}; - -static int -is_combo(int transforms) -{ - return transforms & (transforms-1); /* non-zero if more than one set bit */ -} - -static int -first_transform(int transforms) -{ - return transforms & -transforms; /* lowest set bit */ -} - -static int -is_bad_combo(int transforms) -{ - unsigned int i; - - for (i=0; i<ARRAY_SIZE(known_bad_combos); ++i) - { - int combo = known_bad_combos[i][0]; - - if ((combo & transforms) == combo && - (transforms & known_bad_combos[i][1]) == 0) - return 1; - } - - return 0; /* combo is ok */ -} - -static const char * -transform_name(int t) - /* The name, if 't' has multiple bits set the name of the lowest set bit is - * returned. - */ -{ - unsigned int i; - - t &= -t; /* first set bit */ - - for (i=0; i<TTABLE_SIZE; ++i) - { - if ((transform_info[i].transform & t) != 0) - return transform_info[i].name; - } - - return "invalid transform"; -} - -/* Variables calculated by validate_T below and used to record all the supported - * transforms. Need (unsigned int) here because of the places where these - * values are used (unsigned compares in the 'exhaustive' iterator.) - */ -static unsigned int read_transforms, write_transforms, rw_transforms; - -static void -validate_T(void) - /* Validate the above table - this just builds the above values */ -{ - unsigned int i; - - for (i=0; i<TTABLE_SIZE; ++i) - { - if (transform_info[i].when & TRANSFORM_R) - read_transforms |= transform_info[i].transform; - - if (transform_info[i].when & TRANSFORM_W) - write_transforms |= transform_info[i].transform; - } - - /* Reversible transforms are those which are supported on both read and - * write. - */ - rw_transforms = read_transforms & write_transforms; -} - -/* FILE DATA HANDLING - * The original file is cached in memory. During write the output file is - * written to memory. - * - * In both cases the file data is held in a linked list of buffers - not all - * of these are in use at any time. - */ -#define NEW(type) ((type *)malloc(sizeof (type))) -#define DELETE(ptr) (free(ptr)) - -struct buffer_list -{ - struct buffer_list *next; /* next buffer in list */ - png_byte buffer[1024]; /* the actual buffer */ -}; - -struct buffer -{ - struct buffer_list *last; /* last buffer in use */ - size_t end_count; /* bytes in the last buffer */ - struct buffer_list *current; /* current buffer being read */ - size_t read_count; /* count of bytes read from current */ - struct buffer_list first; /* the very first buffer */ -}; - -static void -buffer_init(struct buffer *buffer) - /* Call this only once for a given buffer */ -{ - buffer->first.next = NULL; - buffer->last = NULL; - buffer->current = NULL; -} - -static void -buffer_destroy_list(struct buffer_list *list) -{ - if (list != NULL) - { - struct buffer_list *next = list->next; - DELETE(list); - buffer_destroy_list(next); - } -} - -static void -buffer_destroy(struct buffer *buffer) -{ - struct buffer_list *list = buffer->first.next; - buffer_init(buffer); - buffer_destroy_list(list); -} - -#ifdef PNG_WRITE_SUPPORTED -static void -buffer_start_write(struct buffer *buffer) -{ - buffer->last = &buffer->first; - buffer->end_count = 0; - buffer->current = NULL; -} -#endif - -static void -buffer_start_read(struct buffer *buffer) -{ - buffer->current = &buffer->first; - buffer->read_count = 0; -} - -#ifdef ENOMEM /* required by POSIX 1003.1 */ -# define MEMORY ENOMEM -#else -# define MEMORY ERANGE /* required by ANSI-C */ -#endif -static struct buffer * -get_buffer(png_structp pp) - /* Used from libpng callbacks to get the current buffer */ -{ - return (struct buffer*)png_get_io_ptr(pp); -} - -static struct buffer_list * -buffer_extend(struct buffer_list *current) -{ - struct buffer_list *add; - - assert(current->next == NULL); - - add = NEW(struct buffer_list); - if (add == NULL) - return NULL; - - add->next = NULL; - current->next = add; - - return add; -} - -/* Load a buffer from a file; does the equivalent of buffer_start_write. On a - * read error returns an errno value, else returns 0. - */ -static int -buffer_from_file(struct buffer *buffer, FILE *fp) -{ - struct buffer_list *last = &buffer->first; - size_t count = 0; - - for (;;) - { - size_t r = fread(last->buffer+count, 1/*size*/, - (sizeof last->buffer)-count, fp); - - if (r > 0) - { - count += r; - - if (count >= sizeof last->buffer) - { - assert(count == sizeof last->buffer); - count = 0; - - if (last->next == NULL) - { - last = buffer_extend(last); - if (last == NULL) - return MEMORY; - } - - else - last = last->next; - } - } - - else /* fread failed - probably end of file */ - { - if (feof(fp)) - { - buffer->last = last; - buffer->end_count = count; - return 0; /* no error */ - } - - /* Some kind of funky error; errno should be non-zero */ - return errno == 0 ? ERANGE : errno; - } - } -} - -/* This structure is used to control the test of a single file. */ -typedef enum -{ - VERBOSE, /* switches on all messages */ - INFORMATION, - WARNINGS, /* switches on warnings */ - LIBPNG_WARNING, - APP_WARNING, - ERRORS, /* just errors */ - APP_FAIL, /* continuable error - no need to longjmp */ - LIBPNG_ERROR, /* this and higher cause a longjmp */ - LIBPNG_BUG, /* erroneous behavior in libpng */ - APP_ERROR, /* such as out-of-memory in a callback */ - QUIET, /* no normal messages */ - USER_ERROR, /* such as file-not-found */ - INTERNAL_ERROR -} error_level; -#define LEVEL_MASK 0xf /* where the level is in 'options' */ - -#define EXHAUSTIVE 0x010 /* Test all combinations of active options */ -#define STRICT 0x020 /* Fail on warnings as well as errors */ -#define LOG 0x040 /* Log pass/fail to stdout */ -#define CONTINUE 0x080 /* Continue on APP_FAIL errors */ -#define SKIP_BUGS 0x100 /* Skip over known bugs */ -#define LOG_SKIPPED 0x200 /* Log skipped bugs */ -#define FIND_BAD_COMBOS 0x400 /* Attempt to deduce bad combos */ - -/* Result masks apply to the result bits in the 'results' field below; these - * bits are simple 1U<<error_level. A pass requires either nothing worse than - * warnings (--relaxes) or nothing worse than information (--strict) - */ -#define RESULT_STRICT(r) (((r) & ~((1U<<WARNINGS)-1)) == 0) -#define RESULT_RELAXED(r) (((r) & ~((1U<<ERRORS)-1)) == 0) - -struct display -{ - jmp_buf error_return; /* Where to go to on error */ - - const char *filename; /* The name of the original file */ - const char *operation; /* Operation being performed */ - int transforms; /* Transform used in operation */ - png_uint_32 options; /* See display_log below */ - png_uint_32 results; /* A mask of errors seen */ - - - png_structp original_pp; /* used on the original read */ - png_infop original_ip; /* set by the original read */ - - png_size_t original_rowbytes; /* of the original rows: */ - png_bytepp original_rows; /* from the original read */ - - /* Original chunks valid */ - png_uint_32 chunks; - - /* Original IHDR information */ - png_uint_32 width; - png_uint_32 height; - int bit_depth; - int color_type; - int interlace_method; - int compression_method; - int filter_method; - - /* Derived information for the original image. */ - int active_transforms; /* transforms that do something on read */ - int ignored_transforms; /* transforms that should do nothing */ - - /* Used on a read, both the original read and when validating a written - * image. - */ - png_structp read_pp; - png_infop read_ip; - -# ifdef PNG_WRITE_SUPPORTED - /* Used to write a new image (the original info_ptr is used) */ - png_structp write_pp; - struct buffer written_file; /* where the file gets written */ -# endif - - struct buffer original_file; /* Data read from the original file */ -}; - -static void -display_init(struct display *dp) - /* Call this only once right at the start to initialize the control - * structure, the (struct buffer) lists are maintained across calls - the - * memory is not freed. - */ -{ - memset(dp, 0, sizeof *dp); - dp->options = WARNINGS; /* default to !verbose, !quiet */ - dp->filename = NULL; - dp->operation = NULL; - dp->original_pp = NULL; - dp->original_ip = NULL; - dp->original_rows = NULL; - dp->read_pp = NULL; - dp->read_ip = NULL; - buffer_init(&dp->original_file); - -# ifdef PNG_WRITE_SUPPORTED - dp->write_pp = NULL; - buffer_init(&dp->written_file); -# endif -} - -static void -display_clean_read(struct display *dp) -{ - if (dp->read_pp != NULL) - png_destroy_read_struct(&dp->read_pp, &dp->read_ip, NULL); -} - -#ifdef PNG_WRITE_SUPPORTED -static void -display_clean_write(struct display *dp) -{ - if (dp->write_pp != NULL) - png_destroy_write_struct(&dp->write_pp, NULL); -} -#endif - -static void -display_clean(struct display *dp) -{ -# ifdef PNG_WRITE_SUPPORTED - display_clean_write(dp); -# endif - display_clean_read(dp); - - dp->original_rowbytes = 0; - dp->original_rows = NULL; - dp->chunks = 0; - - png_destroy_read_struct(&dp->original_pp, &dp->original_ip, NULL); - /* leave the filename for error detection */ - dp->results = 0; /* reset for next time */ -} - -static void -display_destroy(struct display *dp) -{ - /* Release any memory held in the display. */ -# ifdef PNG_WRITE_SUPPORTED - buffer_destroy(&dp->written_file); -# endif - - buffer_destroy(&dp->original_file); -} - -static struct display * -get_dp(png_structp pp) - /* The display pointer is always stored in the png_struct error pointer */ -{ - struct display *dp = (struct display*)png_get_error_ptr(pp); - - if (dp == NULL) - { - fprintf(stderr, "pngimage: internal error (no display)\n"); - exit(99); /* prevents a crash */ - } - - return dp; -} - -/* error handling */ -#ifdef __GNUC__ -# define VGATTR __attribute__((__format__ (__printf__,3,4))) - /* Required to quiet GNUC warnings when the compiler sees a stdarg function - * that calls one of the stdio v APIs. - */ -#else -# define VGATTR -#endif -static void VGATTR -display_log(struct display *dp, error_level level, const char *fmt, ...) - /* 'level' is as above, fmt is a stdio style format string. This routine - * does not return if level is above LIBPNG_WARNING - */ -{ - dp->results |= 1U << level; - - if (level > (error_level)(dp->options & LEVEL_MASK)) - { - const char *lp; - va_list ap; - - switch (level) - { - case INFORMATION: lp = "information"; break; - case LIBPNG_WARNING: lp = "warning(libpng)"; break; - case APP_WARNING: lp = "warning(pngimage)"; break; - case APP_FAIL: lp = "error(continuable)"; break; - case LIBPNG_ERROR: lp = "error(libpng)"; break; - case LIBPNG_BUG: lp = "bug(libpng)"; break; - case APP_ERROR: lp = "error(pngimage)"; break; - case USER_ERROR: lp = "error(user)"; break; - - case INTERNAL_ERROR: /* anything unexpected is an internal error: */ - case VERBOSE: case WARNINGS: case ERRORS: case QUIET: - default: lp = "bug(pngimage)"; break; - } - - fprintf(stderr, "%s: %s: %s", - dp->filename != NULL ? dp->filename : "<stdin>", lp, dp->operation); - - if (dp->transforms != 0) - { - int tr = dp->transforms; - - if (is_combo(tr)) - fprintf(stderr, "(0x%x)", tr); - - else - fprintf(stderr, "(%s)", transform_name(tr)); - } - - fprintf(stderr, ": "); - - va_start(ap, fmt); - vfprintf(stderr, fmt, ap); - va_end(ap); - - fputc('\n', stderr); - } - /* else do not output any message */ - - /* Errors cause this routine to exit to the fail code */ - if (level > APP_FAIL || (level > ERRORS && !(dp->options & CONTINUE))) - longjmp(dp->error_return, level); -} - -/* error handler callbacks for libpng */ -static void PNGCBAPI -display_warning(png_structp pp, png_const_charp warning) -{ - display_log(get_dp(pp), LIBPNG_WARNING, "%s", warning); -} - -static void PNGCBAPI -display_error(png_structp pp, png_const_charp error) -{ - struct display *dp = get_dp(pp); - - display_log(dp, LIBPNG_ERROR, "%s", error); -} - -static void -display_cache_file(struct display *dp, const char *filename) - /* Does the initial cache of the file. */ -{ - FILE *fp; - int ret; - - dp->filename = filename; - - if (filename != NULL) - { - fp = fopen(filename, "rb"); - if (fp == NULL) - display_log(dp, USER_ERROR, "open failed: %s", strerror(errno)); - } - - else - fp = stdin; - - ret = buffer_from_file(&dp->original_file, fp); - - fclose(fp); - - if (ret != 0) - display_log(dp, APP_ERROR, "read failed: %s", strerror(ret)); -} - -static void -buffer_read(struct display *dp, struct buffer *bp, png_bytep data, - png_size_t size) -{ - struct buffer_list *last = bp->current; - size_t read_count = bp->read_count; - - while (size > 0) - { - size_t avail; - - if (last == NULL || - (last == bp->last && read_count >= bp->end_count)) - { - display_log(dp, USER_ERROR, "file truncated (%lu bytes)", - (unsigned long)size); - /*NOTREACHED*/ - break; - } - - else if (read_count >= sizeof last->buffer) - { - /* Move to the next buffer: */ - last = last->next; - read_count = 0; - bp->current = last; /* Avoid update outside the loop */ - - /* And do a sanity check (the EOF case is caught above) */ - if (last == NULL) - { - display_log(dp, INTERNAL_ERROR, "damaged buffer list"); - /*NOTREACHED*/ - break; - } - } - - avail = (sizeof last->buffer) - read_count; - if (avail > size) - avail = size; - - memcpy(data, last->buffer + read_count, avail); - read_count += avail; - size -= avail; - data += avail; - } - - bp->read_count = read_count; -} - -static void PNGCBAPI -read_function(png_structp pp, png_bytep data, png_size_t size) -{ - buffer_read(get_dp(pp), get_buffer(pp), data, size); -} - -static void -read_png(struct display *dp, struct buffer *bp, const char *operation, - int transforms) -{ - png_structp pp; - png_infop ip; - - /* This cleans out any previous read and sets operation and transforms to - * empty. - */ - display_clean_read(dp); - - if (operation != NULL) /* else this is a verify and do not overwrite info */ - { - dp->operation = operation; - dp->transforms = transforms; - } - - dp->read_pp = pp = png_create_read_struct(PNG_LIBPNG_VER_STRING, dp, - display_error, display_warning); - if (pp == NULL) - display_log(dp, LIBPNG_ERROR, "failed to create read struct"); - - /* The png_read_png API requires us to make the info struct, but it does the - * call to png_read_info. - */ - dp->read_ip = ip = png_create_info_struct(pp); - if (ip == NULL) - display_log(dp, LIBPNG_ERROR, "failed to create info struct"); - -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - /* Remove the user limits, if any */ - png_set_user_limits(pp, 0x7fffffff, 0x7fffffff); -# endif - - /* Set the IO handling */ - buffer_start_read(bp); - png_set_read_fn(pp, bp, read_function); - - png_read_png(pp, ip, transforms, NULL/*params*/); - -#if 0 /* crazy debugging */ - { - png_bytep pr = png_get_rows(pp, ip)[0]; - size_t rb = png_get_rowbytes(pp, ip); - size_t cb; - char c = ' '; - - fprintf(stderr, "%.4x %2d (%3lu bytes):", transforms, png_get_bit_depth(pp,ip), (unsigned long)rb); - - for (cb=0; cb<rb; ++cb) - fputc(c, stderr), fprintf(stderr, "%.2x", pr[cb]), c='.'; - - fputc('\n', stderr); - } -#endif -} - -static void -update_display(struct display *dp) - /* called once after the first read to update all the info, original_pp and - * original_ip must have been filled in. - */ -{ - png_structp pp; - png_infop ip; - - /* Now perform the initial read with a 0 tranform. */ - read_png(dp, &dp->original_file, "original read", 0/*no transform*/); - - /* Move the result to the 'original' fields */ - dp->original_pp = pp = dp->read_pp, dp->read_pp = NULL; - dp->original_ip = ip = dp->read_ip, dp->read_ip = NULL; - - dp->original_rowbytes = png_get_rowbytes(pp, ip); - if (dp->original_rowbytes == 0) - display_log(dp, LIBPNG_BUG, "png_get_rowbytes returned 0"); - - dp->chunks = png_get_valid(pp, ip, 0xffffffff); - if ((dp->chunks & PNG_INFO_IDAT) == 0) /* set by png_read_png */ - display_log(dp, LIBPNG_BUG, "png_read_png did not set IDAT flag"); - - dp->original_rows = png_get_rows(pp, ip); - if (dp->original_rows == NULL) - display_log(dp, LIBPNG_BUG, "png_read_png did not create row buffers"); - - if (!png_get_IHDR(pp, ip, - &dp->width, &dp->height, &dp->bit_depth, &dp->color_type, - &dp->interlace_method, &dp->compression_method, &dp->filter_method)) - display_log(dp, LIBPNG_BUG, "png_get_IHDR failed"); - - /* 'active' transforms are discovered based on the original image format; - * running one active transform can activate others. At present the code - * does not attempt to determine the closure. - */ - { - png_uint_32 chunks = dp->chunks; - int active = 0, inactive = 0; - int ct = dp->color_type; - int bd = dp->bit_depth; - unsigned int i; - - for (i=0; i<TTABLE_SIZE; ++i) - { - int transform = transform_info[i].transform; - - if ((transform_info[i].valid_chunks == 0 || - (transform_info[i].valid_chunks & chunks) != 0) && - (transform_info[i].color_mask_required & ct) == - transform_info[i].color_mask_required && - (transform_info[i].color_mask_absent & ct) == 0 && - (transform_info[i].bit_depths & bd) != 0 && - (transform_info[i].when & TRANSFORM_R) != 0) - active |= transform; - - else if ((transform_info[i].when & TRANSFORM_R) != 0) - inactive |= transform; - } - - /* Some transforms appear multiple times in the table; the 'active' status - * is the logical OR of these and the inactive status must be adjusted to - * take this into account. - */ - inactive &= ~active; - - dp->active_transforms = active; - dp->ignored_transforms = inactive; /* excluding write-only transforms */ - - if (active == 0) - display_log(dp, INTERNAL_ERROR, "bad transform table"); - } -} - -static int -compare_read(struct display *dp, int applied_transforms) -{ - /* Compare the png_info from read_ip with original_info */ - size_t rowbytes; - png_uint_32 width, height; - int bit_depth, color_type; - int interlace_method, compression_method, filter_method; - const char *e = NULL; - - png_get_IHDR(dp->read_pp, dp->read_ip, &width, &height, &bit_depth, - &color_type, &interlace_method, &compression_method, &filter_method); - -# define C(item) if (item != dp->item) \ - display_log(dp, APP_WARNING, "IHDR " #item "(%lu) changed to %lu",\ - (unsigned long)dp->item, (unsigned long)item), e = #item - - /* The IHDR should be identical: */ - C(width); - C(height); - C(bit_depth); - C(color_type); - C(interlace_method); - C(compression_method); - C(filter_method); - - /* 'e' remains set to the name of the last thing changed: */ - if (e) - display_log(dp, APP_ERROR, "IHDR changed (%s)", e); - - /* All the chunks from the original PNG should be preserved in the output PNG - * because the PNG format has not been changed. - */ - { - unsigned long chunks = - png_get_valid(dp->read_pp, dp->read_ip, 0xffffffff); - - if (chunks != dp->chunks) - display_log(dp, APP_FAIL, "PNG chunks changed from 0x%lx to 0x%lx", - (unsigned long)dp->chunks, chunks); - } - - /* rowbytes should be the same */ - rowbytes = png_get_rowbytes(dp->read_pp, dp->read_ip); - - /* NOTE: on 64-bit systems this may trash the top bits of rowbytes, - * which could lead to weird error messages. - */ - if (rowbytes != dp->original_rowbytes) - display_log(dp, APP_ERROR, "PNG rowbytes changed from %lu to %lu", - (unsigned long)dp->original_rowbytes, (unsigned long)rowbytes); - - /* The rows should be the same too, unless the applied transforms includes - * the shift transform, in which case low bits may have been lost. - */ - { - png_bytepp rows = png_get_rows(dp->read_pp, dp->read_ip); - unsigned int mask; /* mask (if not zero) for the final byte */ - - if (bit_depth < 8) - { - /* Need the stray bits at the end, this depends only on the low bits - * of the image width; overflow does not matter. If the width is an - * exact multiple of 8 bits this gives a mask of 0, not 0xff. - */ - mask = 0xff & (0xff00 >> ((bit_depth * width) & 7)); - } - - else - mask = 0; - - if (rows == NULL) - display_log(dp, LIBPNG_BUG, "png_get_rows returned NULL"); - - if ((applied_transforms & PNG_TRANSFORM_SHIFT) == 0 || - (dp->active_transforms & PNG_TRANSFORM_SHIFT) == 0 || - color_type == PNG_COLOR_TYPE_PALETTE) - { - unsigned long y; - - for (y=0; y<height; ++y) - { - png_bytep row = rows[y]; - png_bytep orig = dp->original_rows[y]; - - if (memcmp(row, orig, rowbytes-(mask != 0)) != 0 || (mask != 0 && - ((row[rowbytes-1] & mask) != (orig[rowbytes-1] & mask)))) - { - size_t x; - - /* Find the first error */ - for (x=0; x<rowbytes-1; ++x) if (row[x] != orig[x]) - break; - - display_log(dp, APP_FAIL, - "byte(%lu,%lu) changed 0x%.2x -> 0x%.2x", - (unsigned long)x, (unsigned long)y, orig[x], row[x]); - return 0; /* don't keep reporting failed rows on 'continue' */ - } - } - } - - else - { - unsigned long y; - int bpp; /* bits-per-pixel then bytes-per-pixel */ - /* components are up to 8 bytes in size */ - png_byte sig_bits[8]; - png_color_8p sBIT; - - if (png_get_sBIT(dp->read_pp, dp->read_ip, &sBIT) != PNG_INFO_sBIT) - display_log(dp, INTERNAL_ERROR, - "active shift transform but no sBIT in file"); - - switch (color_type) - { - case PNG_COLOR_TYPE_GRAY: - sig_bits[0] = sBIT->gray; - bpp = bit_depth; - break; - - case PNG_COLOR_TYPE_GA: - sig_bits[0] = sBIT->gray; - sig_bits[1] = sBIT->alpha; - bpp = 2 * bit_depth; - break; - - case PNG_COLOR_TYPE_RGB: - sig_bits[0] = sBIT->red; - sig_bits[1] = sBIT->green; - sig_bits[2] = sBIT->blue; - bpp = 3 * bit_depth; - break; - - case PNG_COLOR_TYPE_RGBA: - sig_bits[0] = sBIT->red; - sig_bits[1] = sBIT->green; - sig_bits[2] = sBIT->blue; - sig_bits[3] = sBIT->alpha; - bpp = 4 * bit_depth; - break; - - default: - display_log(dp, LIBPNG_ERROR, "invalid colour type %d", - color_type); - /*NOTREACHED*/ - bpp = 0; - break; - } - - { - int b; - - for (b=0; 8*b<bpp; ++b) - { - /* libpng should catch this; if not there is a security issue - * because an app (like this one) may overflow an array. In fact - * libpng doesn't catch this at present. - */ - if (sig_bits[b] == 0 || sig_bits[b] > bit_depth/*!palette*/) - display_log(dp, LIBPNG_BUG, - "invalid sBIT[%u] value %d returned for PNG bit depth %d", - b, sig_bits[b], bit_depth); - } - } - - if (bpp < 8 && bpp != bit_depth) - { - /* sanity check; this is a grayscale PNG; something is wrong in the - * code above. - */ - display_log(dp, INTERNAL_ERROR, "invalid bpp %u for bit_depth %u", - bpp, bit_depth); - } - - switch (bit_depth) - { - int b; - - case 16: /* Two bytes per component, bit-endian */ - for (b = (bpp >> 4); b > 0; ) - { - unsigned int sig = (unsigned int)(0xffff0000 >> sig_bits[b]); - - sig_bits[2*b+1] = (png_byte)sig; - sig_bits[2*b+0] = (png_byte)(sig >> 8); /* big-endian */ - } - break; - - case 8: /* One byte per component */ - for (b=0; b*8 < bpp; ++b) - sig_bits[b] = (png_byte)(0xff00 >> sig_bits[b]); - break; - - case 1: /* allowed, but dumb */ - /* Value is 1 */ - sig_bits[0] = 0xff; - break; - - case 2: /* Replicate 4 times */ - /* Value is 1 or 2 */ - b = 0x3 & ((0x3<<2) >> sig_bits[0]); - b |= b << 2; - b |= b << 4; - sig_bits[0] = (png_byte)b; - break; - - case 4: /* Relicate twice */ - /* Value is 1, 2, 3 or 4 */ - b = 0xf & ((0xf << 4) >> sig_bits[0]); - b |= b << 4; - sig_bits[0] = (png_byte)b; - break; - - default: - display_log(dp, LIBPNG_BUG, "invalid bit depth %d", bit_depth); - break; - } - - /* Convert bpp to bytes; this gives '1' for low-bit depth grayscale, - * where there are multiple pixels per byte. - */ - bpp = (bpp+7) >> 3; - - /* The mask can be combined with sig_bits[0] */ - if (mask != 0) - { - mask &= sig_bits[0]; - - if (bpp != 1 || mask == 0) - display_log(dp, INTERNAL_ERROR, "mask calculation error %u, %u", - bpp, mask); - } - - for (y=0; y<height; ++y) - { - png_bytep row = rows[y]; - png_bytep orig = dp->original_rows[y]; - unsigned long x; - - for (x=0; x<(width-(mask!=0)); ++x) - { - int b; - - for (b=0; b<bpp; ++b) - { - if ((*row++ & sig_bits[b]) != (*orig++ & sig_bits[b])) - { - display_log(dp, APP_FAIL, - "significant bits at (%lu[%u],%lu) changed %.2x->%.2x", - x, b, y, orig[-1], row[-1]); - return 0; - } - } - } - - if (mask != 0 && (*row & mask) != (*orig & mask)) - { - display_log(dp, APP_FAIL, - "significant bits at (%lu[end],%lu) changed", x, y); - return 0; - } - } /* for y */ - } - } - - return 1; /* compare succeeded */ -} - -#ifdef PNG_WRITE_SUPPORTED -static void -buffer_write(struct display *dp, struct buffer *buffer, png_bytep data, - png_size_t size) - /* Generic write function used both from the write callback provided to - * libpng and from the generic read code. - */ -{ - /* Write the data into the buffer, adding buffers as required */ - struct buffer_list *last = buffer->last; - size_t end_count = buffer->end_count; - - while (size > 0) - { - size_t avail; - - if (end_count >= sizeof last->buffer) - { - if (last->next == NULL) - { - last = buffer_extend(last); - - if (last == NULL) - display_log(dp, APP_ERROR, "out of memory saving file"); - } - - else - last = last->next; - - buffer->last = last; /* avoid the need to rewrite every time */ - end_count = 0; - } - - avail = (sizeof last->buffer) - end_count; - if (avail > size) - avail = size; - - memcpy(last->buffer + end_count, data, avail); - end_count += avail; - size -= avail; - data += avail; - } - - buffer->end_count = end_count; -} - -static void PNGCBAPI -write_function(png_structp pp, png_bytep data, png_size_t size) -{ - buffer_write(get_dp(pp), get_buffer(pp), data, size); -} - -static void -write_png(struct display *dp, png_infop ip, int transforms) -{ - display_clean_write(dp); /* safety */ - - buffer_start_write(&dp->written_file); - dp->operation = "write"; - dp->transforms = transforms; - - dp->write_pp = png_create_write_struct(PNG_LIBPNG_VER_STRING, dp, - display_error, display_warning); - - if (dp->write_pp == NULL) - display_log(dp, APP_ERROR, "failed to create write png_struct"); - - png_set_write_fn(dp->write_pp, &dp->written_file, write_function, - NULL/*flush*/); - -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - /* Remove the user limits, if any */ - png_set_user_limits(dp->write_pp, 0x7fffffff, 0x7fffffff); -# endif - - /* Certain transforms require the png_info to be zapped to allow the - * transform to work correctly. - */ - if (transforms & (PNG_TRANSFORM_PACKING| - PNG_TRANSFORM_STRIP_FILLER| - PNG_TRANSFORM_STRIP_FILLER_BEFORE)) - { - int ct = dp->color_type; - - if (transforms & (PNG_TRANSFORM_STRIP_FILLER| - PNG_TRANSFORM_STRIP_FILLER_BEFORE)) - ct &= ~PNG_COLOR_MASK_ALPHA; - - png_set_IHDR(dp->write_pp, ip, dp->width, dp->height, dp->bit_depth, ct, - dp->interlace_method, dp->compression_method, dp->filter_method); - } - - png_write_png(dp->write_pp, ip, transforms, NULL/*params*/); - - /* Clean it on the way out - if control returns to the caller then the - * written_file contains the required data. - */ - display_clean_write(dp); -} -#endif /* WRITE_SUPPORTED */ - -static int -skip_transform(struct display *dp, int tr) - /* Helper to test for a bad combo and log it if it is skipped */ -{ - if ((dp->options & SKIP_BUGS) != 0 && is_bad_combo(tr)) - { - /* Log this to stdout if logging is on, otherwise just do an information - * display_log. - */ - if ((dp->options & LOG_SKIPPED) != 0) - { - printf("SKIP: %s transforms ", dp->filename); - - while (tr != 0) - { - int next = first_transform(tr); - tr &= ~next; - - printf("%s", transform_name(next)); - if (tr != 0) - putchar('+'); - } - - putchar('\n'); - } - - else - display_log(dp, INFORMATION, "%s: skipped known bad combo 0x%x", - dp->filename, tr); - - return 1; /* skip */ - } - - return 0; /* don't skip */ -} - -static void -test_one_file(struct display *dp, const char *filename) -{ - /* First cache the file and update the display original file - * information for the new file. - */ - dp->operation = "cache file"; - dp->transforms = 0; - display_cache_file(dp, filename); - update_display(dp); - - /* First test: if there are options that should be ignored for this file - * verify that they really are ignored. - */ - if (dp->ignored_transforms != 0) - { - read_png(dp, &dp->original_file, "ignored transforms", - dp->ignored_transforms); - - /* The result should be identical to the original_rows */ - if (!compare_read(dp, 0/*transforms applied*/)) - return; /* no point testing more */ - } - -#ifdef PNG_WRITE_SUPPORTED - /* Second test: write the original PNG data out to a new file (to test the - * write side) then read the result back in and make sure that it hasn't - * changed. - */ - dp->operation = "write"; - write_png(dp, dp->original_ip, 0/*transforms*/); - read_png(dp, &dp->written_file, NULL, 0/*transforms*/); - if (!compare_read(dp, 0/*transforms applied*/)) - return; -#endif - - /* Third test: the active options. Test each in turn, or, with the - * EXHAUSTIVE option, test all possible combinations. - */ - { - /* Use unsigned int here because the code below to increment through all - * the possibilities exhaustively has to use a compare and that must be - * unsigned, because some transforms are negative on a 16-bit system. - */ - unsigned int active = dp->active_transforms; - const int exhaustive = (dp->options & EXHAUSTIVE) != 0; - unsigned int current = first_transform(active); - unsigned int bad_transforms = 0; - unsigned int bad_combo = ~0U; /* bitwise AND of failing transforms */ - unsigned int bad_combo_list = 0; /* bitwise OR of failures */ - - for (;;) - { - read_png(dp, &dp->original_file, "active transforms", current); - - /* If this involved any irreversible transformations then if we write - * it out with just the reversible transformations and read it in again - * with the same transforms we should get the same thing. At present - * this isn't done - it just seems like a waste of time and it would - * require two sets of read png_struct/png_info. - * - * If there were no irreversible transformations then if we write it - * out and read it back in again (without the reversible transforms) - * we should get back to the place where we started. - */ -#ifdef PNG_WRITE_SUPPORTED - if ((current & write_transforms) == current) - { - /* All transforms reversible: write the PNG with the transformations - * reversed, then read it back in with no transformations. The - * result should be the same as the original apart from the loss of - * low order bits because of the SHIFT/sBIT transform. - */ - dp->operation = "reversible transforms"; - write_png(dp, dp->read_ip, current); - - /* And if this is read back in, because all the transformations were - * reversible, the result should be the same. - */ - read_png(dp, &dp->written_file, NULL, 0); - if (!compare_read(dp, current/*for the SHIFT/sBIT transform*/)) - { - /* This set of transforms failed. If a single bit is set - if - * there is just one transform - don't include this in further - * 'exhaustive' tests. Notice that each transform is tested on - * its own before testing combos in the exhaustive case. - */ - if (is_combo(current)) - { - bad_combo &= current; - bad_combo_list |= current; - } - - else - bad_transforms |= current; - } - } -#endif - - /* Now move to the next transform */ - if (exhaustive) /* all combinations */ - { - unsigned int next = current; - - do - { - if (next == read_transforms) /* Everything tested */ - goto combo; - - ++next; - } /* skip known bad combos if the relevant option is set; skip - * combos involving known bad single transforms in all cases. - */ - while ( (next & read_transforms) <= current - || (next & active) == 0 /* skip cases that do nothing */ - || (next & bad_transforms) != 0 - || skip_transform(dp, next)); - - assert((next & read_transforms) == next); - current = next; - } - - else /* one at a time */ - { - active &= ~current; - - if (active == 0) - goto combo; - - current = first_transform(active); - } - } - -combo: - if (dp->options & FIND_BAD_COMBOS) - { - /* bad_combos identifies the combos that occur in all failing cases; - * bad_combo_list identifies transforms that do not prevent the - * failure. - */ - if (bad_combo != ~0U) - printf("%s[0x%x]: PROBLEM: 0x%x[0x%x] ANTIDOTE: 0x%x\n", - dp->filename, active, bad_combo, bad_combo_list, - rw_transforms & ~bad_combo_list); - - else - printf("%s: no %sbad combos found\n", dp->filename, - (dp->options & SKIP_BUGS) ? "additional " : ""); - } - } -} - -static int -do_test(struct display *dp, const char *file) - /* Exists solely to isolate the setjmp clobbers */ -{ - int ret = setjmp(dp->error_return); - - if (ret == 0) - { - test_one_file(dp, file); - return 0; - } - - else if (ret < ERRORS) /* shouldn't longjmp on warnings */ - display_log(dp, INTERNAL_ERROR, "unexpected return code %d", ret); - - return ret; -} - -int -main(const int argc, const char * const * const argv) -{ - /* For each file on the command line test it with a range of transforms */ - int option_end, ilog = 0; - struct display d; - - validate_T(); - display_init(&d); - - for (option_end=1; option_end<argc; ++option_end) - { - const char *name = argv[option_end]; - - if (strcmp(name, "--verbose") == 0) - d.options = (d.options & ~LEVEL_MASK) | VERBOSE; - - else if (strcmp(name, "--warnings") == 0) - d.options = (d.options & ~LEVEL_MASK) | WARNINGS; - - else if (strcmp(name, "--errors") == 0) - d.options = (d.options & ~LEVEL_MASK) | ERRORS; - - else if (strcmp(name, "--quiet") == 0) - d.options = (d.options & ~LEVEL_MASK) | QUIET; - - else if (strcmp(name, "--exhaustive") == 0) - d.options |= EXHAUSTIVE; - - else if (strcmp(name, "--fast") == 0) - d.options &= ~EXHAUSTIVE; - - else if (strcmp(name, "--strict") == 0) - d.options |= STRICT; - - else if (strcmp(name, "--relaxed") == 0) - d.options &= ~STRICT; - - else if (strcmp(name, "--log") == 0) - { - ilog = option_end; /* prevent display */ - d.options |= LOG; - } - - else if (strcmp(name, "--nolog") == 0) - d.options &= ~LOG; - - else if (strcmp(name, "--continue") == 0) - d.options |= CONTINUE; - - else if (strcmp(name, "--stop") == 0) - d.options &= ~CONTINUE; - - else if (strcmp(name, "--skip-bugs") == 0) - d.options |= SKIP_BUGS; - - else if (strcmp(name, "--test-all") == 0) - d.options &= ~SKIP_BUGS; - - else if (strcmp(name, "--log-skipped") == 0) - d.options |= LOG_SKIPPED; - - else if (strcmp(name, "--nolog-skipped") == 0) - d.options &= ~LOG_SKIPPED; - - else if (strcmp(name, "--find-bad-combos") == 0) - d.options |= FIND_BAD_COMBOS; - - else if (strcmp(name, "--nofind-bad-combos") == 0) - d.options &= ~FIND_BAD_COMBOS; - - else if (name[0] == '-' && name[1] == '-') - { - fprintf(stderr, "pngimage: %s: unknown option\n", name); - return 99; - } - - else - break; /* Not an option */ - } - - { - int i; - int errors = 0; - - for (i=option_end; i<argc; ++i) - { - { - int ret = do_test(&d, argv[i]); - - if (ret > QUIET) /* abort on user or internal error */ - return 99; - } - - /* Here on any return, including failures, except user/internal issues - */ - { - const int pass = (d.options & STRICT) ? - RESULT_STRICT(d.results) : RESULT_RELAXED(d.results); - - if (!pass) - ++errors; - - if (d.options & LOG) - { - int j; - - printf("%s: pngimage ", pass ? "PASS" : "FAIL"); - - for (j=1; j<option_end; ++j) if (j != ilog) - printf("%s ", argv[j]); - - printf("%s\n", d.filename); - } - } - - display_clean(&d); - } - - /* Release allocated memory */ - display_destroy(&d); - - return errors != 0; - } -} -#else /* !PNG_INFO_IMAGE_SUPPORTED || !PNG_READ_SUPPORTED */ -int -main(void) -{ - fprintf(stderr, "pngimage: no support for png_read/write_image\n"); - return 77; -} -#endif diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngstest.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngstest.c deleted file mode 100644 index d7c1c1e794b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngstest.c +++ /dev/null @@ -1,3818 +0,0 @@ -/*- - * pngstest.c - * - * Copyright (c) 2013-2014 John Cunningham Bowler - * - * Last changed in libpng 1.6.16 [December 22, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Test for the PNG 'simplified' APIs. - */ -#define _ISOC90_SOURCE 1 -#define MALLOC_CHECK_ 2/*glibc facility: turn on debugging*/ - -#include <stddef.h> -#include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include <errno.h> -#include <ctype.h> -#include <math.h> - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include <config.h> -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -#ifdef PNG_SIMPLIFIED_READ_SUPPORTED /* Else nothing can be done */ -#include "../tools/sRGB.h" - -/* KNOWN ISSUES - * - * These defines switch on alternate algorithms for format conversions to match - * the current libpng implementation; they are set to allow pngstest to pass - * even though libpng is producing answers that are not as correct as they - * should be. - */ -#define ALLOW_UNUSED_GPC 0 - /* If true include unused static GPC functions and declare an external array - * of them to hide the fact that they are unused. This is for development - * use while testing the correct function to use to take into account libpng - * misbehavior, such as using a simple power law to correct sRGB to linear. - */ - -/* The following is to support direct compilation of this file as C++ */ -#ifdef __cplusplus -# define voidcast(type, value) static_cast<type>(value) -# define aligncastconst(type, value) \ - static_cast<type>(static_cast<const void*>(value)) -#else -# define voidcast(type, value) (value) -# define aligncastconst(type, value) ((const void*)(value)) -#endif /* __cplusplus */ - -/* During parallel runs of pngstest each temporary file needs a unique name, - * this is used to permit uniqueness using a command line argument which can be - * up to 22 characters long. - */ -static char tmpf[23] = "TMP"; - -/* Generate random bytes. This uses a boring repeatable algorithm and it - * is implemented here so that it gives the same set of numbers on every - * architecture. It's a linear congruential generator (Knuth or Sedgewick - * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and - * Hill, "The Art of Electronics". - */ -static void -make_random_bytes(png_uint_32* seed, void* pv, size_t size) -{ - png_uint_32 u0 = seed[0], u1 = seed[1]; - png_bytep bytes = voidcast(png_bytep, pv); - - /* There are thirty three bits, the next bit in the sequence is bit-33 XOR - * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. - */ - size_t i; - for (i=0; i<size; ++i) - { - /* First generate 8 new bits then shift them in at the end. */ - png_uint_32 u = ((u0 >> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; - u1 <<= 8; - u1 |= u0 >> 24; - u0 <<= 8; - u0 |= u; - *bytes++ = (png_byte)u; - } - - seed[0] = u0; - seed[1] = u1; -} - -static void -random_color(png_colorp color) -{ - static png_uint_32 color_seed[2] = { 0x12345678, 0x9abcdef }; - make_random_bytes(color_seed, color, sizeof *color); -} - -/* Math support - neither Cygwin nor Visual Studio have C99 support and we need - * a predictable rounding function, so make one here: - */ -static double -closestinteger(double x) -{ - return floor(x + .5); -} - -/* Cast support: remove GCC whines. */ -static png_byte -u8d(double d) -{ - d = closestinteger(d); - return (png_byte)d; -} - -static png_uint_16 -u16d(double d) -{ - d = closestinteger(d); - return (png_uint_16)d; -} - -/* sRGB support: use exact calculations rounded to the nearest int, see the - * fesetround() call in main(). sRGB_to_d optimizes the 8 to 16-bit conversion. - */ -static double sRGB_to_d[256]; -static double g22_to_d[256]; - -static void -init_sRGB_to_d(void) -{ - int i; - - sRGB_to_d[0] = 0; - for (i=1; i<255; ++i) - sRGB_to_d[i] = linear_from_sRGB(i/255.); - sRGB_to_d[255] = 1; - - g22_to_d[0] = 0; - for (i=1; i<255; ++i) - g22_to_d[i] = pow(i/255., 1/.45455); - g22_to_d[255] = 1; -} - -static png_byte -sRGB(double linear /*range 0.0 .. 1.0*/) -{ - return u8d(255 * sRGB_from_linear(linear)); -} - -static png_byte -isRGB(int fixed_linear) -{ - return sRGB(fixed_linear / 65535.); -} - -#if 0 /* not used */ -static png_byte -unpremultiply(int component, int alpha) -{ - if (alpha <= component) - return 255; /* Arbitrary, but consistent with the libpng code */ - - else if (alpha >= 65535) - return isRGB(component); - - else - return sRGB((double)component / alpha); -} -#endif - -static png_uint_16 -ilinear(int fixed_srgb) -{ - return u16d(65535 * sRGB_to_d[fixed_srgb]); -} - -static png_uint_16 -ilineara(int fixed_srgb, int alpha) -{ - return u16d((257 * alpha) * sRGB_to_d[fixed_srgb]); -} - -static png_uint_16 -ilinear_g22(int fixed_srgb) -{ - return u16d(65535 * g22_to_d[fixed_srgb]); -} - -#if ALLOW_UNUSED_GPC -static png_uint_16 -ilineara_g22(int fixed_srgb, int alpha) -{ - return u16d((257 * alpha) * g22_to_d[fixed_srgb]); -} -#endif - -static double -YfromRGBint(int ir, int ig, int ib) -{ - double r = ir; - double g = ig; - double b = ib; - return YfromRGB(r, g, b); -} - -#if 0 /* unused */ -/* The error that results from using a 2.2 power law in place of the correct - * sRGB transform, given an 8-bit value which might be either sRGB or power-law. - */ -static int -power_law_error8(int value) -{ - if (value > 0 && value < 255) - { - double vd = value / 255.; - double e = fabs( - pow(sRGB_to_d[value], 1/2.2) - sRGB_from_linear(pow(vd, 2.2))); - - /* Always allow an extra 1 here for rounding errors */ - e = 1+floor(255 * e); - return (int)e; - } - - return 0; -} - -static int error_in_sRGB_roundtrip = 56; /* by experiment */ -static int -power_law_error16(int value) -{ - if (value > 0 && value < 65535) - { - /* Round trip the value through an 8-bit representation but using - * non-matching to/from conversions. - */ - double vd = value / 65535.; - double e = fabs( - pow(sRGB_from_linear(vd), 2.2) - linear_from_sRGB(pow(vd, 1/2.2))); - - /* Always allow an extra 1 here for rounding errors */ - e = error_in_sRGB_roundtrip+floor(65535 * e); - return (int)e; - } - - return 0; -} - -static int -compare_8bit(int v1, int v2, int error_limit, int multiple_algorithms) -{ - int e = abs(v1-v2); - int ev1, ev2; - - if (e <= error_limit) - return 1; - - if (!multiple_algorithms) - return 0; - - ev1 = power_law_error8(v1); - if (e <= ev1) - return 1; - - ev2 = power_law_error8(v2); - if (e <= ev2) - return 1; - - return 0; -} - -static int -compare_16bit(int v1, int v2, int error_limit, int multiple_algorithms) -{ - int e = abs(v1-v2); - int ev1, ev2; - - if (e <= error_limit) - return 1; - - /* "multiple_algorithms" in this case means that a color-map has been - * involved somewhere, so we can deduce that the values were forced to 8-bit - * (like the via_linear case for 8-bit.) - */ - if (!multiple_algorithms) - return 0; - - ev1 = power_law_error16(v1); - if (e <= ev1) - return 1; - - ev2 = power_law_error16(v2); - if (e <= ev2) - return 1; - - return 0; -} -#endif /* unused */ - -#define READ_FILE 1 /* else memory */ -#define USE_STDIO 2 /* else use file name */ -#define STRICT 4 /* fail on warnings too */ -#define VERBOSE 8 -#define KEEP_TMPFILES 16 /* else delete temporary files */ -#define KEEP_GOING 32 -#define ACCUMULATE 64 -#define FAST_WRITE 128 -#define sRGB_16BIT 256 - -static void -print_opts(png_uint_32 opts) -{ - if (opts & READ_FILE) - printf(" --file"); - if (opts & USE_STDIO) - printf(" --stdio"); - if (opts & STRICT) - printf(" --strict"); - if (opts & VERBOSE) - printf(" --verbose"); - if (opts & KEEP_TMPFILES) - printf(" --preserve"); - if (opts & KEEP_GOING) - printf(" --keep-going"); - if (opts & ACCUMULATE) - printf(" --accumulate"); - if (!(opts & FAST_WRITE)) /* --fast is currently the default */ - printf(" --slow"); - if (opts & sRGB_16BIT) - printf(" --sRGB-16bit"); -} - -#define FORMAT_NO_CHANGE 0x80000000 /* additional flag */ - -/* A name table for all the formats - defines the format of the '+' arguments to - * pngstest. - */ -#define FORMAT_COUNT 64 -#define FORMAT_MASK 0x3f -static PNG_CONST char * PNG_CONST format_names[FORMAT_COUNT] = -{ - "sRGB-gray", - "sRGB-gray+alpha", - "sRGB-rgb", - "sRGB-rgb+alpha", - "linear-gray", - "linear-gray+alpha", - "linear-rgb", - "linear-rgb+alpha", - - "color-mapped-sRGB-gray", - "color-mapped-sRGB-gray+alpha", - "color-mapped-sRGB-rgb", - "color-mapped-sRGB-rgb+alpha", - "color-mapped-linear-gray", - "color-mapped-linear-gray+alpha", - "color-mapped-linear-rgb", - "color-mapped-linear-rgb+alpha", - - "sRGB-gray", - "sRGB-gray+alpha", - "sRGB-bgr", - "sRGB-bgr+alpha", - "linear-gray", - "linear-gray+alpha", - "linear-bgr", - "linear-bgr+alpha", - - "color-mapped-sRGB-gray", - "color-mapped-sRGB-gray+alpha", - "color-mapped-sRGB-bgr", - "color-mapped-sRGB-bgr+alpha", - "color-mapped-linear-gray", - "color-mapped-linear-gray+alpha", - "color-mapped-linear-bgr", - "color-mapped-linear-bgr+alpha", - - "sRGB-gray", - "alpha+sRGB-gray", - "sRGB-rgb", - "alpha+sRGB-rgb", - "linear-gray", - "alpha+linear-gray", - "linear-rgb", - "alpha+linear-rgb", - - "color-mapped-sRGB-gray", - "color-mapped-alpha+sRGB-gray", - "color-mapped-sRGB-rgb", - "color-mapped-alpha+sRGB-rgb", - "color-mapped-linear-gray", - "color-mapped-alpha+linear-gray", - "color-mapped-linear-rgb", - "color-mapped-alpha+linear-rgb", - - "sRGB-gray", - "alpha+sRGB-gray", - "sRGB-bgr", - "alpha+sRGB-bgr", - "linear-gray", - "alpha+linear-gray", - "linear-bgr", - "alpha+linear-bgr", - - "color-mapped-sRGB-gray", - "color-mapped-alpha+sRGB-gray", - "color-mapped-sRGB-bgr", - "color-mapped-alpha+sRGB-bgr", - "color-mapped-linear-gray", - "color-mapped-alpha+linear-gray", - "color-mapped-linear-bgr", - "color-mapped-alpha+linear-bgr", -}; - -/* Decode an argument to a format number. */ -static png_uint_32 -formatof(const char *arg) -{ - char *ep; - unsigned long format = strtoul(arg, &ep, 0); - - if (ep > arg && *ep == 0 && format < FORMAT_COUNT) - return (png_uint_32)format; - - else for (format=0; format < FORMAT_COUNT; ++format) - { - if (strcmp(format_names[format], arg) == 0) - return (png_uint_32)format; - } - - fprintf(stderr, "pngstest: format name '%s' invalid\n", arg); - return FORMAT_COUNT; -} - -/* Bitset/test functions for formats */ -#define FORMAT_SET_COUNT (FORMAT_COUNT / 32) -typedef struct -{ - png_uint_32 bits[FORMAT_SET_COUNT]; -} -format_list; - -static void format_init(format_list *pf) -{ - int i; - for (i=0; i<FORMAT_SET_COUNT; ++i) - pf->bits[i] = 0; /* All off */ -} - -#if 0 /* currently unused */ -static void format_clear(format_list *pf) -{ - int i; - for (i=0; i<FORMAT_SET_COUNT; ++i) - pf->bits[i] = 0; -} -#endif - -static int format_is_initial(format_list *pf) -{ - int i; - for (i=0; i<FORMAT_SET_COUNT; ++i) - if (pf->bits[i] != 0) - return 0; - - return 1; -} - -static int format_set(format_list *pf, png_uint_32 format) -{ - if (format < FORMAT_COUNT) - return pf->bits[format >> 5] |= ((png_uint_32)1) << (format & 31); - - return 0; -} - -#if 0 /* currently unused */ -static int format_unset(format_list *pf, png_uint_32 format) -{ - if (format < FORMAT_COUNT) - return pf->bits[format >> 5] &= ~((png_uint_32)1) << (format & 31); - - return 0; -} -#endif - -static int format_isset(format_list *pf, png_uint_32 format) -{ - return format < FORMAT_COUNT && - (pf->bits[format >> 5] & (((png_uint_32)1) << (format & 31))) != 0; -} - -static void format_default(format_list *pf, int redundant) -{ - if (redundant) - { - int i; - - /* set everything, including flags that are pointless */ - for (i=0; i<FORMAT_SET_COUNT; ++i) - pf->bits[i] = ~(png_uint_32)0; - } - - else - { - png_uint_32 f; - - for (f=0; f<FORMAT_COUNT; ++f) - { - /* Eliminate redundant and unsupported settings. */ -# ifdef PNG_FORMAT_BGR_SUPPORTED - /* BGR is meaningless if no color: */ - if ((f & PNG_FORMAT_FLAG_COLOR) == 0 && - (f & PNG_FORMAT_FLAG_BGR) != 0) -# else - if ((f & 0x10U/*HACK: fixed value*/) != 0) -# endif - continue; - - /* AFIRST is meaningless if no alpha: */ -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if ((f & PNG_FORMAT_FLAG_ALPHA) == 0 && - (f & PNG_FORMAT_FLAG_AFIRST) != 0) -# else - if ((f & 0x20U/*HACK: fixed value*/) != 0) -# endif - continue; - - format_set(pf, f); - } - } -} - -/* THE Image STRUCTURE */ -/* The super-class of a png_image, contains the decoded image plus the input - * data necessary to re-read the file with a different format. - */ -typedef struct -{ - png_image image; - png_uint_32 opts; - const char *file_name; - int stride_extra; - FILE *input_file; - png_voidp input_memory; - png_size_t input_memory_size; - png_bytep buffer; - ptrdiff_t stride; - png_size_t bufsize; - png_size_t allocsize; - char tmpfile_name[32]; - png_uint_16 colormap[256*4]; -} -Image; - -/* Initializer: also sets the permitted error limit for 16-bit operations. */ -static void -newimage(Image *image) -{ - memset(image, 0, sizeof *image); -} - -/* Reset the image to be read again - only needs to rewind the FILE* at present. - */ -static void -resetimage(Image *image) -{ - if (image->input_file != NULL) - rewind(image->input_file); -} - -/* Free the image buffer; the buffer is re-used on a re-read, this is just for - * cleanup. - */ -static void -freebuffer(Image *image) -{ - if (image->buffer) free(image->buffer); - image->buffer = NULL; - image->bufsize = 0; - image->allocsize = 0; -} - -/* Delete function; cleans out all the allocated data and the temporary file in - * the image. - */ -static void -freeimage(Image *image) -{ - freebuffer(image); - png_image_free(&image->image); - - if (image->input_file != NULL) - { - fclose(image->input_file); - image->input_file = NULL; - } - - if (image->input_memory != NULL) - { - free(image->input_memory); - image->input_memory = NULL; - image->input_memory_size = 0; - } - - if (image->tmpfile_name[0] != 0 && (image->opts & KEEP_TMPFILES) == 0) - { - remove(image->tmpfile_name); - image->tmpfile_name[0] = 0; - } -} - -/* This is actually a re-initializer; allows an image structure to be re-used by - * freeing everything that relates to an old image. - */ -static void initimage(Image *image, png_uint_32 opts, const char *file_name, - int stride_extra) -{ - freeimage(image); - memset(&image->image, 0, sizeof image->image); - image->opts = opts; - image->file_name = file_name; - image->stride_extra = stride_extra; -} - -/* Make sure the image buffer is big enough; allows re-use of the buffer if the - * image is re-read. - */ -#define BUFFER_INIT8 73 -static void -allocbuffer(Image *image) -{ - png_size_t size = PNG_IMAGE_BUFFER_SIZE(image->image, image->stride); - - if (size+32 > image->bufsize) - { - freebuffer(image); - image->buffer = voidcast(png_bytep, malloc(size+32)); - if (image->buffer == NULL) - { - fflush(stdout); - fprintf(stderr, - "simpletest: out of memory allocating %lu(+32) byte buffer\n", - (unsigned long)size); - exit(1); - } - image->bufsize = size+32; - } - - memset(image->buffer, 95, image->bufsize); - memset(image->buffer+16, BUFFER_INIT8, size); - image->allocsize = size; -} - -/* Make sure 16 bytes match the given byte. */ -static int -check16(png_const_bytep bp, int b) -{ - int i = 16; - - do - if (*bp != b) return 1; - while (--i); - - return 0; -} - -/* Check for overwrite in the image buffer. */ -static void -checkbuffer(Image *image, const char *arg) -{ - if (check16(image->buffer, 95)) - { - fflush(stdout); - fprintf(stderr, "%s: overwrite at start of image buffer\n", arg); - exit(1); - } - - if (check16(image->buffer+16+image->allocsize, 95)) - { - fflush(stdout); - fprintf(stderr, "%s: overwrite at end of image buffer\n", arg); - exit(1); - } -} - -/* ERROR HANDLING */ -/* Log a terminal error, also frees the libpng part of the image if necessary. - */ -static int -logerror(Image *image, const char *a1, const char *a2, const char *a3) -{ - fflush(stdout); - if (image->image.warning_or_error) - fprintf(stderr, "%s%s%s: %s\n", a1, a2, a3, image->image.message); - - else - fprintf(stderr, "%s%s%s\n", a1, a2, a3); - - if (image->image.opaque != NULL) - { - fprintf(stderr, "%s: image opaque pointer non-NULL on error\n", - image->file_name); - png_image_free(&image->image); - } - - return 0; -} - -/* Log an error and close a file (just a utility to do both things in one - * function call.) - */ -static int -logclose(Image *image, FILE *f, const char *name, const char *operation) -{ - int e = errno; - - fclose(f); - return logerror(image, name, operation, strerror(e)); -} - -/* Make sure the png_image has been freed - validates that libpng is doing what - * the spec says and freeing the image. - */ -static int -checkopaque(Image *image) -{ - if (image->image.opaque != NULL) - { - png_image_free(&image->image); - return logerror(image, image->file_name, ": opaque not NULL", ""); - } - - else if (image->image.warning_or_error != 0 && (image->opts & STRICT) != 0) - return logerror(image, image->file_name, " --strict", ""); - - else - return 1; -} - -/* IMAGE COMPARISON/CHECKING */ -/* Compare the pixels of two images, which should be the same but aren't. The - * images must have been checked for a size match. - */ -typedef struct -{ - /* The components, for grayscale images the gray value is in 'g' and if alpha - * is not present 'a' is set to 255 or 65535 according to format. - */ - int r, g, b, a; -} Pixel; - -typedef struct -{ - /* The background as the original sRGB 8-bit value converted to the final - * integer format and as a double precision linear value in the range 0..1 - * for with partially transparent pixels. - */ - int ir, ig, ib; - double dr, dg, db; /* linear r,g,b scaled to 0..1 */ -} Background; - -/* Basic image formats; control the data but not the layout thereof. */ -#define BASE_FORMATS\ - (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_LINEAR) - -/* Read a Pixel from a buffer. The code below stores the correct routine for - * the format in a function pointer, these are the routines: - */ -static void -gp_g8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = p->g = p->b = pp[0]; - p->a = 255; -} - -static void -gp_ga8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = p->g = p->b = pp[0]; - p->a = pp[1]; -} - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_ag8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = p->g = p->b = pp[1]; - p->a = pp[0]; -} -#endif - -static void -gp_rgb8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = 255; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgr8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = 255; -} -#endif - -static void -gp_rgba8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = pp[3]; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgra8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = pp[3]; -} -#endif - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_argb8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[1]; - p->g = pp[2]; - p->b = pp[3]; - p->a = pp[0]; -} -#endif - -#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED) -static void -gp_abgr8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[3]; - p->g = pp[2]; - p->b = pp[1]; - p->a = pp[0]; -} -#endif - -static void -gp_g16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = p->g = p->b = pp[0]; - p->a = 65535; -} - -static void -gp_ga16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = p->g = p->b = pp[0]; - p->a = pp[1]; -} - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_ag16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = p->g = p->b = pp[1]; - p->a = pp[0]; -} -#endif - -static void -gp_rgb16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = 65535; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgr16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = 65535; -} -#endif - -static void -gp_rgba16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = pp[3]; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgra16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = pp[3]; -} -#endif - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_argb16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[1]; - p->g = pp[2]; - p->b = pp[3]; - p->a = pp[0]; -} -#endif - -#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED) -static void -gp_abgr16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[3]; - p->g = pp[2]; - p->b = pp[1]; - p->a = pp[0]; -} -#endif - -/* Given a format, return the correct one of the above functions. */ -static void (* -get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb) -{ - /* The color-map flag is irrelevant here - the caller of the function - * returned must either pass the buffer or, for a color-mapped image, the - * correct entry in the color-map. - */ - if (format & PNG_FORMAT_FLAG_LINEAR) - { - if (format & PNG_FORMAT_FLAG_COLOR) - { -# ifdef PNG_FORMAT_BGR_SUPPORTED - if (format & PNG_FORMAT_FLAG_BGR) - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_abgr16; - - else -# endif - return gp_bgra16; - } - - else - return gp_bgr16; - } - - else -# endif - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_argb16; - - else -# endif - return gp_rgba16; - } - - else - return gp_rgb16; - } - } - - else - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_ag16; - - else -# endif - return gp_ga16; - } - - else - return gp_g16; - } - } - - else - { - if (format & PNG_FORMAT_FLAG_COLOR) - { -# ifdef PNG_FORMAT_BGR_SUPPORTED - if (format & PNG_FORMAT_FLAG_BGR) - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_abgr8; - - else -# endif - return gp_bgra8; - } - - else - return gp_bgr8; - } - - else -# endif - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_argb8; - - else -# endif - return gp_rgba8; - } - - else - return gp_rgb8; - } - } - - else - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_ag8; - - else -# endif - return gp_ga8; - } - - else - return gp_g8; - } - } -} - -/* Convertion between pixel formats. The code above effectively eliminates the - * component ordering changes leaving three basic changes: - * - * 1) Remove an alpha channel by pre-multiplication or compositing on a - * background color. (Adding an alpha channel is a no-op.) - * - * 2) Remove color by mapping to grayscale. (Grayscale to color is a no-op.) - * - * 3) Convert between 8-bit and 16-bit components. (Both directtions are - * relevant.) - * - * This gives the following base format conversion matrix: - * - * OUT: ----- 8-bit ----- ----- 16-bit ----- - * IN G GA RGB RGBA G GA RGB RGBA - * 8 G . . . . lin lin lin lin - * 8 GA bckg . bckc . pre' pre pre' pre - * 8 RGB g8 g8 . . glin glin lin lin - * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre - * 16 G sRGB sRGB sRGB sRGB . . . . - * 16 GA b16g unpg b16c unpc A . A . - * 16 RGB sG sG sRGB sRGB g16 g16 . . - * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . - * - * 8-bit to 8-bit: - * bckg: composite on gray background - * bckc: composite on color background - * g8: convert sRGB components to sRGB grayscale - * g8b: convert sRGB components to grayscale and composite on gray background - * - * 8-bit to 16-bit: - * lin: make sRGB components linear, alpha := 65535 - * pre: make sRGB components linear and premultiply by alpha (scale alpha) - * pre': as 'pre' but alpha := 65535 - * glin: make sRGB components linear, convert to grayscale, alpha := 65535 - * gpre: make sRGB components grayscale and linear and premultiply by alpha - * gpr': as 'gpre' but alpha := 65535 - * - * 16-bit to 8-bit: - * sRGB: convert linear components to sRGB, alpha := 255 - * unpg: unpremultiply gray component and convert to sRGB (scale alpha) - * unpc: unpremultiply color components and convert to sRGB (scale alpha) - * b16g: composite linear onto gray background and convert the result to sRGB - * b16c: composite linear onto color background and convert the result to sRGB - * sG: convert linear RGB to sRGB grayscale - * sGp: unpremultiply RGB then convert to sRGB grayscale - * sCp: unpremultiply RGB then convert to sRGB - * gb16: composite linear onto background and convert to sRGB grayscale - * (order doesn't matter, the composite and grayscale operations permute) - * cb16: composite linear onto background and convert to sRGB - * - * 16-bit to 16-bit: - * A: set alpha to 65535 - * g16: convert linear RGB to linear grayscale (alpha := 65535) - * g16': as 'g16' but alpha is unchanged - */ -/* Simple copy: */ -static void -gpc_noop(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = in->r; - out->g = in->g; - out->b = in->b; - out->a = in->a; -} - -#if ALLOW_UNUSED_GPC -static void -gpc_nop8(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - if (in->a == 0) - out->r = out->g = out->b = 255; - - else - { - out->r = in->r; - out->g = in->g; - out->b = in->b; - } - - out->a = in->a; -} -#endif - -#if ALLOW_UNUSED_GPC -static void -gpc_nop6(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - if (in->a == 0) - out->r = out->g = out->b = 65535; - - else - { - out->r = in->r; - out->g = in->g; - out->b = in->b; - } - - out->a = in->a; -} -#endif - -/* 8-bit to 8-bit conversions */ -/* bckg: composite on gray background */ -static void -gpc_bckg(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else if (in->a >= 255) - out->r = out->g = out->b = in->g; - - else - { - double a = in->a / 255.; - - out->r = out->g = out->b = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); - } - - out->a = 255; -} - -/* bckc: composite on color background */ -static void -gpc_bckc(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - { - out->r = back->ir; - out->g = back->ig; - out->b = back->ib; - } - - else if (in->a >= 255) - { - out->r = in->r; - out->g = in->g; - out->b = in->b; - } - - else - { - double a = in->a / 255.; - - out->r = sRGB(sRGB_to_d[in->r] * a + back->dr * (1-a)); - out->g = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); - out->b = sRGB(sRGB_to_d[in->b] * a + back->db * (1-a)); - } - - out->a = 255; -} - -/* g8: convert sRGB components to sRGB grayscale */ -static void -gpc_g8(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = in->g; - - else - out->r = out->g = out->b = - sRGB(YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = in->a; -} - -/* g8b: convert sRGB components to grayscale and composite on gray background */ -static void -gpc_g8b(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else if (in->a >= 255) - { - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = in->g; - - else - out->r = out->g = out->b = sRGB(YfromRGB( - sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - } - - else - { - double a = in->a/255.; - - out->r = out->g = out->b = sRGB(a * YfromRGB(sRGB_to_d[in->r], - sRGB_to_d[in->g], sRGB_to_d[in->b]) + back->dg * (1-a)); - } - - out->a = 255; -} - -/* 8-bit to 16-bit conversions */ -/* lin: make sRGB components linear, alpha := 65535 */ -static void -gpc_lin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilinear(in->r); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilinear(in->b); - } - - else - { - out->g = ilinear(in->g); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilinear(in->b); - } - - out->a = 65535; -} - -/* pre: make sRGB components linear and premultiply by alpha (scale alpha) */ -static void -gpc_pre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara(in->b, in->a); - } - - else - { - out->g = ilineara(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara(in->b, in->a); - } - - out->a = in->a * 257; -} - -/* pre': as 'pre' but alpha := 65535 */ -static void -gpc_preq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara(in->b, in->a); - } - - else - { - out->g = ilineara(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara(in->b, in->a); - } - - out->a = 65535; -} - -/* glin: make sRGB components linear, convert to grayscale, alpha := 65535 */ -static void -gpc_glin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilinear(in->g); - - else - out->r = out->g = out->b = u16d(65535 * - YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = 65535; -} - -/* gpre: make sRGB components grayscale and linear and premultiply by alpha */ -static void -gpc_gpre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = 257 * in->a; -} - -/* gpr': as 'gpre' but alpha := 65535 */ -static void -gpc_gprq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = 65535; -} - -/* 8-bit to 16-bit conversions for gAMA 45455 encoded values */ -/* Lin: make gAMA 45455 components linear, alpha := 65535 */ -static void -gpc_Lin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilinear_g22(in->r); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilinear_g22(in->b); - } - - else - { - out->g = ilinear_g22(in->g); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilinear_g22(in->b); - } - - out->a = 65535; -} - -#if ALLOW_UNUSED_GPC -/* Pre: make gAMA 45455 components linear and premultiply by alpha (scale alpha) - */ -static void -gpc_Pre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara_g22(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara_g22(in->b, in->a); - } - - else - { - out->g = ilineara_g22(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara_g22(in->b, in->a); - } - - out->a = in->a * 257; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Pre': as 'Pre' but alpha := 65535 */ -static void -gpc_Preq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara_g22(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara_g22(in->b, in->a); - } - - else - { - out->g = ilineara_g22(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara_g22(in->b, in->a); - } - - out->a = 65535; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Glin: make gAMA 45455 components linear, convert to grayscale, alpha := 65535 - */ -static void -gpc_Glin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilinear_g22(in->g); - - else - out->r = out->g = out->b = u16d(65535 * - YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); - - out->a = 65535; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Gpre: make gAMA 45455 components grayscale and linear and premultiply by - * alpha. - */ -static void -gpc_Gpre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara_g22(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); - - out->a = 257 * in->a; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Gpr': as 'Gpre' but alpha := 65535 */ -static void -gpc_Gprq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara_g22(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); - - out->a = 65535; -} -#endif - -/* 16-bit to 8-bit conversions */ -/* sRGB: convert linear components to sRGB, alpha := 255 */ -static void -gpc_sRGB(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = isRGB(in->r); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = isRGB(in->b); - } - - else - { - out->g = isRGB(in->g); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = isRGB(in->b); - } - - out->a = 255; -} - -/* unpg: unpremultiply gray component and convert to sRGB (scale alpha) */ -static void -gpc_unpg(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = out->g = out->b = sRGB((double)in->g / in->a); - out->a = u8d(in->a / 257.); - } -} - -/* unpc: unpremultiply color components and convert to sRGB (scale alpha) */ -static void -gpc_unpc(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = sRGB((double)in->r / in->a); - out->g = sRGB((double)in->g / in->a); - out->b = sRGB((double)in->b / in->a); - out->a = u8d(in->a / 257.); - } -} - -/* b16g: composite linear onto gray background and convert the result to sRGB */ -static void -gpc_b16g(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else - { - double a = in->a/65535.; - double a1 = 1-a; - - a /= 65535; - out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); - } - - out->a = 255; -} - -/* b16c: composite linear onto color background and convert the result to sRGB*/ -static void -gpc_b16c(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - { - out->r = back->ir; - out->g = back->ig; - out->b = back->ib; - } - - else - { - double a = in->a/65535.; - double a1 = 1-a; - - a /= 65535; - out->r = sRGB(in->r * a + back->dr * a1); - out->g = sRGB(in->g * a + back->dg * a1); - out->b = sRGB(in->b * a + back->db * a1); - } - - out->a = 255; -} - -/* sG: convert linear RGB to sRGB grayscale */ -static void -gpc_sG(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/65535); - out->a = 255; -} - -/* sGp: unpremultiply RGB then convert to sRGB grayscale */ -static void -gpc_sGp(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/in->a); - out->a = u8d(in->a / 257.); - } -} - -/* sCp: unpremultiply RGB then convert to sRGB */ -static void -gpc_sCp(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = sRGB((double)in->r / in->a); - out->g = sRGB((double)in->g / in->a); - out->b = sRGB((double)in->b / in->a); - out->a = u8d(in->a / 257.); - } -} - -/* gb16: composite linear onto background and convert to sRGB grayscale */ -/* (order doesn't matter, the composite and grayscale operations permute) */ -static void -gpc_gb16(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else if (in->a >= 65535) - out->r = out->g = out->b = isRGB(in->g); - - else - { - double a = in->a / 65535.; - double a1 = 1-a; - - a /= 65535; - out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); - } - - out->a = 255; -} - -/* cb16: composite linear onto background and convert to sRGB */ -static void -gpc_cb16(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - { - out->r = back->ir; - out->g = back->ig; - out->b = back->ib; - } - - else if (in->a >= 65535) - { - out->r = isRGB(in->r); - out->g = isRGB(in->g); - out->b = isRGB(in->b); - } - - else - { - double a = in->a / 65535.; - double a1 = 1-a; - - a /= 65535; - out->r = sRGB(in->r * a + back->dr * a1); - out->g = sRGB(in->g * a + back->dg * a1); - out->b = sRGB(in->b * a + back->db * a1); - } - - out->a = 255; -} - -/* 16-bit to 16-bit conversions */ -/* A: set alpha to 65535 */ -static void -gpc_A(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = in->r; - out->g = in->g; - out->b = in->b; - out->a = 65535; -} - -/* g16: convert linear RGB to linear grayscale (alpha := 65535) */ -static void -gpc_g16(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); - out->a = 65535; -} - -/* g16': as 'g16' but alpha is unchanged */ -static void -gpc_g16q(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); - out->a = in->a; -} - -#if ALLOW_UNUSED_GPC -/* Unused functions (to hide them from GCC unused function warnings) */ -void (* const gpc_unused[]) - (Pixel *out, const Pixel *in, const Background *back) = -{ - gpc_Pre, gpc_Preq, gpc_Glin, gpc_Gpre, gpc_Gprq, gpc_nop8, gpc_nop6 -}; -#endif - -/* OUT: ----- 8-bit ----- ----- 16-bit ----- - * IN G GA RGB RGBA G GA RGB RGBA - * 8 G . . . . lin lin lin lin - * 8 GA bckg . bckc . pre' pre pre' pre - * 8 RGB g8 g8 . . glin glin lin lin - * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre - * 16 G sRGB sRGB sRGB sRGB . . . . - * 16 GA b16g unpg b16c unpc A . A . - * 16 RGB sG sG sRGB sRGB g16 g16 . . - * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . - * - * The matrix is held in an array indexed thus: - * - * gpc_fn[out_format & BASE_FORMATS][in_format & BASE_FORMATS]; - */ -/* This will produce a compile time error if the FORMAT_FLAG values don't - * match the above matrix! - */ -#if PNG_FORMAT_FLAG_ALPHA == 1 && PNG_FORMAT_FLAG_COLOR == 2 &&\ - PNG_FORMAT_FLAG_LINEAR == 4 -static void (* const gpc_fn[8/*in*/][8/*out*/]) - (Pixel *out, const Pixel *in, const Background *back) = -{ -/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ - {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_Lin, gpc_Lin, gpc_Lin, gpc_Lin }, - {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, - {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, - {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, - {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, - {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, - {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, - {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} -}; - -/* The array is repeated for the cases where both the input and output are color - * mapped because then different algorithms are used. - */ -static void (* const gpc_fn_colormapped[8/*in*/][8/*out*/]) - (Pixel *out, const Pixel *in, const Background *back) = -{ -/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ - {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_lin, gpc_lin, gpc_lin, gpc_lin }, - {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, - {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, - {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, - {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, - {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, - {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, - {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} -}; - -/* The error arrays record the error in the same matrix; 64 entries, however - * the different algorithms used in libpng for colormap and direct conversions - * mean that four separate matrices are used (for each combination of - * colormapped and direct.) - * - * In some cases the conversion between sRGB formats goes via a linear - * intermediate; an sRGB to linear conversion (as above) is followed by a simple - * linear to sRGB step with no other conversions. This is done by a separate - * error array from an arbitrary 'in' format to one of the four basic outputs - * (since final output is always sRGB not colormapped). - * - * These arrays may be modified if the --accumulate flag is set during the run; - * then instead of logging errors they are simply added in. - * - * The three entries are currently for transparent, partially transparent and - * opaque input pixel values. Notice that alpha should be exact in each case. - * - * Errors in alpha should only occur when converting from a direct format - * to a colormapped format, when alpha is effectively smashed (so large - * errors can occur.) There should be no error in the '0' and 'opaque' - * values. The fourth entry in the array is used for the alpha error (and it - * should always be zero for the 'via linear' case since this is never color - * mapped.) - * - * Mapping to a colormap smashes the colors, it is necessary to have separate - * values for these cases because they are much larger; it is very much - * impossible to obtain a reasonable result, these are held in - * gpc_error_to_colormap. - */ -#if PNG_FORMAT_FLAG_COLORMAP == 8 /* extra check also required */ -/* START MACHINE GENERATED */ -static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] = -{ - { /* input: sRGB-gray */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, { 0, 0, 372, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: sRGB-gray+alpha */ - { 0, 18, 0, 0 }, { 0, 0, 0, 0 }, { 0, 20, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: sRGB-rgb */ - { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 893, 0 }, { 0, 0, 893, 0 }, { 0, 0, 811, 0 }, { 0, 0, 811, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: sRGB-rgb+alpha */ - { 0, 4, 13, 0 }, { 0, 14, 13, 0 }, { 0, 19, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 832, 764, 0 }, { 0, 832, 764, 0 }, { 0, 897, 788, 0 }, { 0, 897, 788, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: linear-gray */ - { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: linear-gray+alpha */ - { 0, 74, 9, 0 }, { 0, 20, 9, 0 }, { 0, 74, 9, 0 }, { 0, 20, 9, 0 }, - { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: linear-rgb */ - { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, - { 0, 0, 4, 0 }, { 0, 0, 4, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: linear-rgb+alpha */ - { 0, 126, 143, 0 }, { 0, 9, 7, 0 }, { 0, 74, 9, 0 }, { 0, 16, 9, 0 }, - { 0, 4, 4, 0 }, { 0, 5, 4, 0 }, { 0, 0, 0, 0 }, { 0, 1, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-sRGB-gray */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-sRGB-gray+alpha */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-sRGB-rgb */ - { 0, 0, 13, 0 }, { 0, 0, 13, 0 }, { 0, 0, 8, 0 }, { 0, 0, 8, 0 }, - { 0, 0, 673, 0 }, { 0, 0, 673, 0 }, { 0, 0, 674, 0 }, { 0, 0, 674, 0 }, - { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 460, 0 }, { 0, 0, 460, 0 }, { 0, 0, 263, 0 }, { 0, 0, 263, 0 } - }, { /* input: color-mapped-sRGB-rgb+alpha */ - { 0, 6, 8, 0 }, { 0, 7, 8, 0 }, { 0, 75, 8, 0 }, { 0, 9, 8, 0 }, - { 0, 585, 427, 0 }, { 0, 585, 427, 0 }, { 0, 717, 409, 0 }, { 0, 717, 409, 0 }, - { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 13323, 460, 0 }, { 0, 334, 460, 0 }, { 0, 16480, 263, 0 }, { 0, 243, 263, 0 } - }, { /* input: color-mapped-linear-gray */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 282, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-linear-gray+alpha */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 253, 282, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-linear-rgb */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 265, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-linear-rgb+alpha */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 243, 265, 0 } - } -}; -static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] = -{ - { /* input: sRGB-gray */ - { 0, 0, 7, 0 }, { 0, 0, 7, 0 }, { 0, 0, 7, 0 }, { 0, 0, 7, 0 } - }, { /* input: sRGB-gray+alpha */ - { 0, 15, 15, 0 }, { 0, 186, 15, 0 }, { 0, 15, 15, 0 }, { 0, 186, 15, 0 } - }, { /* input: sRGB-rgb */ - { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 15, 0 }, { 0, 0, 15, 0 } - }, { /* input: sRGB-rgb+alpha */ - { 0, 12, 14, 0 }, { 0, 180, 14, 0 }, { 0, 14, 15, 0 }, { 0, 186, 15, 0 } - }, { /* input: linear-gray */ - { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 } - }, { /* input: linear-gray+alpha */ - { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 } - }, { /* input: linear-rgb */ - { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 }, { 0, 0, 1, 0 } - }, { /* input: linear-rgb+alpha */ - { 0, 1, 1, 0 }, { 0, 8, 1, 0 }, { 0, 1, 1, 0 }, { 0, 1, 1, 0 } - }, { /* input: color-mapped-sRGB-gray */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-sRGB-gray+alpha */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-sRGB-rgb */ - { 0, 0, 13, 0 }, { 0, 0, 13, 0 }, { 0, 0, 14, 0 }, { 0, 0, 14, 0 } - }, { /* input: color-mapped-sRGB-rgb+alpha */ - { 0, 4, 8, 0 }, { 0, 9, 8, 0 }, { 0, 8, 3, 0 }, { 0, 32, 3, 0 } - }, { /* input: color-mapped-linear-gray */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-linear-gray+alpha */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-linear-rgb */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - }, { /* input: color-mapped-linear-rgb+alpha */ - { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } - } -}; -static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] = -{ - { /* input: sRGB-gray */ - { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, { 0, 0, 9, 0 }, - { 0, 0, 560, 0 }, { 0, 0, 560, 0 }, { 0, 0, 560, 0 }, { 0, 0, 560, 0 } - }, { /* input: sRGB-gray+alpha */ - { 0, 19, 2, 0 }, { 0, 255, 2, 25 }, { 0, 88, 2, 0 }, { 0, 255, 2, 25 }, - { 0, 1012, 745, 0 }, { 0, 16026, 745, 6425 }, { 0, 1012, 745, 0 }, { 0, 16026, 745, 6425 } - }, { /* input: sRGB-rgb */ - { 0, 0, 19, 0 }, { 0, 0, 19, 0 }, { 0, 0, 25, 0 }, { 0, 0, 25, 0 }, - { 0, 0, 937, 0 }, { 0, 0, 937, 0 }, { 0, 0, 13677, 0 }, { 0, 0, 13677, 0 } - }, { /* input: sRGB-rgb+alpha */ - { 0, 63, 77, 0 }, { 0, 255, 19, 25 }, { 0, 220, 25, 0 }, { 0, 255, 25, 67 }, - { 0, 17534, 18491, 0 }, { 0, 15614, 2824, 6425 }, { 0, 14019, 13677, 0 }, { 0, 48573, 13677, 17219 } - }, { /* input: linear-gray */ - { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, - { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 }, { 0, 0, 18817, 0 } - }, { /* input: linear-gray+alpha */ - { 0, 74, 74, 0 }, { 0, 255, 74, 25 }, { 0, 97, 74, 0 }, { 0, 255, 74, 25 }, - { 0, 18919, 18907, 0 }, { 0, 24549, 18907, 6552 }, { 0, 18919, 18907, 0 }, { 0, 24549, 18907, 6552 } - }, { /* input: linear-rgb */ - { 0, 0, 73, 0 }, { 0, 0, 73, 0 }, { 0, 0, 98, 0 }, { 0, 0, 98, 0 }, - { 0, 0, 18664, 0 }, { 0, 0, 18664, 0 }, { 0, 0, 24998, 0 }, { 0, 0, 24998, 0 } - }, { /* input: linear-rgb+alpha */ - { 0, 181, 196, 0 }, { 0, 255, 61, 25 }, { 206, 187, 98, 0 }, { 0, 255, 98, 67 }, - { 0, 18141, 18137, 0 }, { 0, 17494, 17504, 6553 }, { 0, 24979, 24992, 0 }, { 0, 46509, 24992, 17347 } - } -}; -/* END MACHINE GENERATED */ -#endif /* COLORMAP flag check */ -#endif /* flag checks */ - -typedef struct -{ - /* Basic pixel information: */ - Image* in_image; /* Input image */ - const Image* out_image; /* Output image */ - - /* 'background' is the value passed to the gpc_ routines, it may be NULL if - * it should not be used (*this* program has an error if it crashes as a - * result!) - */ - Background background_color; - const Background* background; - - /* Precalculated values: */ - int in_opaque; /* Value of input alpha that is opaque */ - int is_palette; /* Sample values come from the palette */ - int accumulate; /* Accumlate component errors (don't log) */ - int output_8bit; /* Output is 8 bit (else 16 bit) */ - - void (*in_gp)(Pixel*, png_const_voidp); - void (*out_gp)(Pixel*, png_const_voidp); - - void (*transform)(Pixel *out, const Pixel *in, const Background *back); - /* A function to perform the required transform */ - - void (*from_linear)(Pixel *out, const Pixel *in, const Background *back); - /* For 'via_linear' transforms the final, from linear, step, else NULL */ - - png_uint_16 error[4]; - /* Three error values for transparent, partially transparent and opaque - * input pixels (in turn). - */ - - png_uint_16 *error_ptr; - /* Where these are stored in the static array (for 'accumulate') */ -} -Transform; - -/* Return a 'transform' as above for the given format conversion. */ -static void -transform_from_formats(Transform *result, Image *in_image, - const Image *out_image, png_const_colorp background, int via_linear) -{ - png_uint_32 in_format, out_format; - png_uint_32 in_base, out_base; - - memset(result, 0, sizeof *result); - - /* Store the original images for error messages */ - result->in_image = in_image; - result->out_image = out_image; - - in_format = in_image->image.format; - out_format = out_image->image.format; - - if (in_format & PNG_FORMAT_FLAG_LINEAR) - result->in_opaque = 65535; - else - result->in_opaque = 255; - - result->output_8bit = (out_format & PNG_FORMAT_FLAG_LINEAR) == 0; - - result->is_palette = 0; /* set by caller if required */ - result->accumulate = (in_image->opts & ACCUMULATE) != 0; - - /* The loaders (which need the ordering information) */ - result->in_gp = get_pixel(in_format); - result->out_gp = get_pixel(out_format); - - /* Remove the ordering information: */ - in_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; - in_base = in_format & BASE_FORMATS; - out_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; - out_base = out_format & BASE_FORMATS; - - if (via_linear) - { - /* Check for an error in this program: */ - if (out_format & (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLORMAP)) - { - fprintf(stderr, "internal transform via linear error 0x%x->0x%x\n", - in_format, out_format); - exit(1); - } - - result->transform = gpc_fn[in_base][out_base | PNG_FORMAT_FLAG_LINEAR]; - result->from_linear = gpc_fn[out_base | PNG_FORMAT_FLAG_LINEAR][out_base]; - result->error_ptr = gpc_error_via_linear[in_format][out_format]; - } - - else if (~in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) - { - /* The input is not colormapped but the output is, the errors will - * typically be large (only the grayscale-no-alpha case permits preserving - * even 8-bit values.) - */ - result->transform = gpc_fn[in_base][out_base]; - result->from_linear = NULL; - result->error_ptr = gpc_error_to_colormap[in_base][out_base]; - } - - else - { - /* The caller handles the colormap->pixel value conversion, so the - * transform function just gets a pixel value, however because libpng - * currently contains a different implementation for mapping a colormap if - * both input and output are colormapped we need different conversion - * functions to deal with errors in the libpng implementation. - */ - if (in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) - result->transform = gpc_fn_colormapped[in_base][out_base]; - else - result->transform = gpc_fn[in_base][out_base]; - result->from_linear = NULL; - result->error_ptr = gpc_error[in_format][out_format]; - } - - /* Follow the libpng simplified API rules to work out what to pass to the gpc - * routines as a background value, if one is not required pass NULL so that - * this program crashes in the even of a programming error. - */ - result->background = NULL; /* default: not required */ - - /* Rule 1: background only need be supplied if alpha is to be removed */ - if (in_format & ~out_format & PNG_FORMAT_FLAG_ALPHA) - { - /* The input value is 'NULL' to use the background and (otherwise) an sRGB - * background color (to use a solid color). The code above uses a fixed - * byte value, BUFFER_INIT8, for buffer even for 16-bit output. For - * linear (16-bit) output the sRGB background color is ignored; the - * composition is always on the background (so BUFFER_INIT8 * 257), except - * that for the colormap (i.e. linear colormapped output) black is used. - */ - result->background = &result->background_color; - - if (out_format & PNG_FORMAT_FLAG_LINEAR || via_linear) - { - if (out_format & PNG_FORMAT_FLAG_COLORMAP) - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = 0; - result->background_color.dr = - result->background_color.dg = - result->background_color.db = 0; - } - - else - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = BUFFER_INIT8 * 257; - result->background_color.dr = - result->background_color.dg = - result->background_color.db = 0; - } - } - - else /* sRGB output */ - { - if (background != NULL) - { - if (out_format & PNG_FORMAT_FLAG_COLOR) - { - result->background_color.ir = background->red; - result->background_color.ig = background->green; - result->background_color.ib = background->blue; - /* TODO: sometimes libpng uses the power law conversion here, how - * to handle this? - */ - result->background_color.dr = sRGB_to_d[background->red]; - result->background_color.dg = sRGB_to_d[background->green]; - result->background_color.db = sRGB_to_d[background->blue]; - } - - else /* grayscale: libpng only looks at 'g' */ - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = background->green; - /* TODO: sometimes libpng uses the power law conversion here, how - * to handle this? - */ - result->background_color.dr = - result->background_color.dg = - result->background_color.db = sRGB_to_d[background->green]; - } - } - - else if ((out_format & PNG_FORMAT_FLAG_COLORMAP) == 0) - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = BUFFER_INIT8; - /* TODO: sometimes libpng uses the power law conversion here, how - * to handle this? - */ - result->background_color.dr = - result->background_color.dg = - result->background_color.db = sRGB_to_d[BUFFER_INIT8]; - } - - /* Else the output is colormapped and a background color must be - * provided; if pngstest crashes then that is a bug in this program - * (though libpng should png_error as well.) - */ - else - result->background = NULL; - } - } - - if (result->background == NULL) - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = -1; /* not used */ - result->background_color.dr = - result->background_color.dg = - result->background_color.db = 1E30; /* not used */ - } - - - /* Copy the error values into the Transform: */ - result->error[0] = result->error_ptr[0]; - result->error[1] = result->error_ptr[1]; - result->error[2] = result->error_ptr[2]; - result->error[3] = result->error_ptr[3]; -} - - -/* Compare two pixels. - * - * OLD error values: -static int error_to_linear = 811; * by experiment * -static int error_to_linear_grayscale = 424; * by experiment * -static int error_to_sRGB = 6; * by experiment * -static int error_to_sRGB_grayscale = 17; * libpng error by calculation + - 2 by experiment * -static int error_in_compose = 2; * by experiment * -static int error_in_premultiply = 1; - * - * The following is *just* the result of a round trip from 8-bit sRGB to linear - * then back to 8-bit sRGB when it is done by libpng. There are two problems: - * - * 1) libpng currently uses a 2.2 power law with no linear segment, this results - * in instability in the low values and even with 16-bit precision sRGB(1) ends - * up mapping to sRGB(0) as a result of rounding in the 16-bit representation. - * This gives an error of 1 in the handling of value 1 only. - * - * 2) libpng currently uses an intermediate 8-bit linear value in gamma - * correction of 8-bit values. This results in many more errors, the worse of - * which is mapping sRGB(14) to sRGB(0). - * - * The general 'error_via_linear' is more complex because of pre-multiplication, - * this compounds the 8-bit errors according to the alpha value of the pixel. - * As a result 256 values are pre-calculated for error_via_linear. - */ -#if 0 -static int error_in_libpng_gamma; -static int error_via_linear[256]; /* Indexed by 8-bit alpha */ - -static void -init_error_via_linear(void) -{ - int alpha; - - error_via_linear[0] = 255; /* transparent pixel */ - - for (alpha=1; alpha<=255; ++alpha) - { - /* 16-bit values less than 128.5 get rounded to 8-bit 0 and so the worst - * case error arises with 16-bit 128.5, work out what sRGB - * (non-associated) value generates 128.5; any value less than this is - * going to map to 0, so the worst error is floor(value). - * - * Note that errors are considerably higher (more than a factor of 2) - * because libpng uses a simple power law for sRGB data at present. - * - * Add .1 for arithmetic errors inside libpng. - */ - double v = floor(255*pow(.5/*(128.5 * 255 / 65535)*/ / alpha, 1/2.2)+.1); - - error_via_linear[alpha] = (int)v; - } - - /* This is actually 14.99, but, despite the closeness to 15, 14 seems to work - * ok in this case. - */ - error_in_libpng_gamma = 14; -} -#endif - -static void -print_pixel(char string[64], const Pixel *pixel, png_uint_32 format) -{ - switch (format & (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR)) - { - case 0: - sprintf(string, "%s(%d)", format_names[format], pixel->g); - break; - - case PNG_FORMAT_FLAG_ALPHA: - sprintf(string, "%s(%d,%d)", format_names[format], pixel->g, - pixel->a); - break; - - case PNG_FORMAT_FLAG_COLOR: - sprintf(string, "%s(%d,%d,%d)", format_names[format], - pixel->r, pixel->g, pixel->b); - break; - - case PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA: - sprintf(string, "%s(%d,%d,%d,%d)", format_names[format], - pixel->r, pixel->g, pixel->b, pixel->a); - break; - - default: - sprintf(string, "invalid-format"); - break; - } -} - -static int -logpixel(const Transform *transform, png_uint_32 x, png_uint_32 y, - const Pixel *in, const Pixel *calc, const Pixel *out, const char *reason) -{ - const png_uint_32 in_format = transform->in_image->image.format; - const png_uint_32 out_format = transform->out_image->image.format; - - png_uint_32 back_format = out_format & ~PNG_FORMAT_FLAG_ALPHA; - const char *via_linear = ""; - - char pixel_in[64], pixel_calc[64], pixel_out[64], pixel_loc[64]; - char background_info[100]; - - print_pixel(pixel_in, in, in_format); - print_pixel(pixel_calc, calc, out_format); - print_pixel(pixel_out, out, out_format); - - if (transform->is_palette) - sprintf(pixel_loc, "palette: %lu", (unsigned long)y); - else - sprintf(pixel_loc, "%lu,%lu", (unsigned long)x, (unsigned long)y); - - if (transform->from_linear != NULL) - { - via_linear = " (via linear)"; - /* And as a result the *read* format which did any background processing - * was itself linear, so the background color information is also - * linear. - */ - back_format |= PNG_FORMAT_FLAG_LINEAR; - } - - if (transform->background != NULL) - { - Pixel back; - char pixel_back[64]; - - back.r = transform->background->ir; - back.g = transform->background->ig; - back.b = transform->background->ib; - back.a = -1; /* not used */ - - print_pixel(pixel_back, &back, back_format); - sprintf(background_info, " on background %s", pixel_back); - } - - else - background_info[0] = 0; - - if (transform->in_image->file_name != transform->out_image->file_name) - { - char error_buffer[512]; - sprintf(error_buffer, - "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" - "Use --preserve and examine: ", pixel_loc, reason, via_linear, - pixel_in, background_info, pixel_out, pixel_calc); - return logerror(transform->in_image, transform->in_image->file_name, - error_buffer, transform->out_image->file_name); - } - - else - { - char error_buffer[512]; - sprintf(error_buffer, - "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" - " The error happened when reading the original file with this format.", - pixel_loc, reason, via_linear, pixel_in, background_info, pixel_out, - pixel_calc); - return logerror(transform->in_image, transform->in_image->file_name, - error_buffer, ""); - } -} - -static int -cmppixel(Transform *transform, png_const_voidp in, png_const_voidp out, - png_uint_32 x, png_uint_32 y/*or palette index*/) -{ - int maxerr; - png_const_charp errmsg; - Pixel pixel_in, pixel_calc, pixel_out; - - transform->in_gp(&pixel_in, in); - - if (transform->from_linear == NULL) - transform->transform(&pixel_calc, &pixel_in, transform->background); - - else - { - transform->transform(&pixel_out, &pixel_in, transform->background); - transform->from_linear(&pixel_calc, &pixel_out, NULL); - } - - transform->out_gp(&pixel_out, out); - - /* Eliminate the case where the input and output values match exactly. */ - if (pixel_calc.a == pixel_out.a && pixel_calc.r == pixel_out.r && - pixel_calc.g == pixel_out.g && pixel_calc.b == pixel_out.b) - return 1; - - /* Eliminate the case where the output pixel is transparent and the output - * is 8-bit - any component values are valid. Don't check the input alpha - * here to also skip the 16-bit small alpha cases. - */ - if (transform->output_8bit && pixel_calc.a == 0 && pixel_out.a == 0) - return 1; - - /* Check for alpha errors first; an alpha error can damage the components too - * so avoid spurious checks on components if one is found. - */ - errmsg = NULL; - { - int err_a = abs(pixel_calc.a-pixel_out.a); - - if (err_a > transform->error[3]) - { - /* If accumulating check the components too */ - if (transform->accumulate) - transform->error[3] = (png_uint_16)err_a; - - else - errmsg = "alpha"; - } - } - - /* Now if *either* of the output alphas are 0 but alpha is within tolerance - * eliminate the 8-bit component comparison. - */ - if (errmsg == NULL && transform->output_8bit && - (pixel_calc.a == 0 || pixel_out.a == 0)) - return 1; - - if (errmsg == NULL) /* else just signal an alpha error */ - { - int err_r = abs(pixel_calc.r - pixel_out.r); - int err_g = abs(pixel_calc.g - pixel_out.g); - int err_b = abs(pixel_calc.b - pixel_out.b); - int limit; - - if ((err_r | err_g | err_b) == 0) - return 1; /* exact match */ - - /* Mismatch on a component, check the input alpha */ - if (pixel_in.a >= transform->in_opaque) - { - errmsg = "opaque component"; - limit = 2; /* opaque */ - } - - else if (pixel_in.a > 0) - { - errmsg = "alpha component"; - limit = 1; /* partially transparent */ - } - - else - { - errmsg = "transparent component (background)"; - limit = 0; /* transparent */ - } - - maxerr = err_r; - if (maxerr < err_g) maxerr = err_g; - if (maxerr < err_b) maxerr = err_b; - - if (maxerr <= transform->error[limit]) - return 1; /* within the error limits */ - - /* Handle a component mis-match; log it, just return an error code, or - * accumulate it. - */ - if (transform->accumulate) - { - transform->error[limit] = (png_uint_16)maxerr; - return 1; /* to cause the caller to keep going */ - } - } - - /* Failure to match and not accumulating, so the error must be logged. */ - return logpixel(transform, x, y, &pixel_in, &pixel_calc, &pixel_out, errmsg); -} - -static png_byte -component_loc(png_byte loc[4], png_uint_32 format) -{ - /* Given a format return the number of channels and the location of - * each channel. - * - * The mask 'loc' contains the component offset of the channels in the - * following order. Note that if 'format' is grayscale the entries 1-3 must - * all contain the location of the gray channel. - * - * 0: alpha - * 1: red or gray - * 2: green or gray - * 3: blue or gray - */ - png_byte channels; - - if (format & PNG_FORMAT_FLAG_COLOR) - { - channels = 3; - - loc[2] = 1; - -# ifdef PNG_FORMAT_BGR_SUPPORTED - if (format & PNG_FORMAT_FLAG_BGR) - { - loc[1] = 2; - loc[3] = 0; - } - - else -# endif - { - loc[1] = 0; - loc[3] = 2; - } - } - - else - { - channels = 1; - loc[1] = loc[2] = loc[3] = 0; - } - - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - { - loc[0] = 0; - ++loc[1]; - ++loc[2]; - ++loc[3]; - } - - else -# endif - loc[0] = channels; - - ++channels; - } - - else - loc[0] = 4; /* not present */ - - return channels; -} - -/* Compare two images, the original 'a', which was written out then read back in - * to * give image 'b'. The formats may have been changed. - */ -static int -compare_two_images(Image *a, Image *b, int via_linear, - png_const_colorp background) -{ - ptrdiff_t stridea = a->stride; - ptrdiff_t strideb = b->stride; - png_const_bytep rowa = a->buffer+16; - png_const_bytep rowb = b->buffer+16; - const png_uint_32 width = a->image.width; - const png_uint_32 height = a->image.height; - const png_uint_32 formata = a->image.format; - const png_uint_32 formatb = b->image.format; - const unsigned int a_sample = PNG_IMAGE_SAMPLE_SIZE(formata); - const unsigned int b_sample = PNG_IMAGE_SAMPLE_SIZE(formatb); - int alpha_added, alpha_removed; - int bchannels; - int btoa[4]; - png_uint_32 y; - Transform tr; - - /* This should never happen: */ - if (width != b->image.width || height != b->image.height) - return logerror(a, a->file_name, ": width x height changed: ", - b->file_name); - - /* Set up the background and the transform */ - transform_from_formats(&tr, a, b, background, via_linear); - - /* Find the first row and inter-row space. */ - if (!(formata & PNG_FORMAT_FLAG_COLORMAP) && - (formata & PNG_FORMAT_FLAG_LINEAR)) - stridea *= 2; - - if (!(formatb & PNG_FORMAT_FLAG_COLORMAP) && - (formatb & PNG_FORMAT_FLAG_LINEAR)) - strideb *= 2; - - if (stridea < 0) rowa += (height-1) * (-stridea); - if (strideb < 0) rowb += (height-1) * (-strideb); - - /* First shortcut the two colormap case by comparing the image data; if it - * matches then we expect the colormaps to match, although this is not - * absolutely necessary for an image match. If the colormaps fail to match - * then there is a problem in libpng. - */ - if (formata & formatb & PNG_FORMAT_FLAG_COLORMAP) - { - /* Only check colormap entries that actually exist; */ - png_const_bytep ppa, ppb; - int match; - png_byte in_use[256], amax = 0, bmax = 0; - - memset(in_use, 0, sizeof in_use); - - ppa = rowa; - ppb = rowb; - - /* Do this the slow way to accumulate the 'in_use' flags, don't break out - * of the loop until the end; this validates the color-mapped data to - * ensure all pixels are valid color-map indexes. - */ - for (y=0, match=1; y<height && match; ++y, ppa += stridea, ppb += strideb) - { - png_uint_32 x; - - for (x=0; x<width; ++x) - { - png_byte bval = ppb[x]; - png_byte aval = ppa[x]; - - if (bval > bmax) - bmax = bval; - - if (bval != aval) - match = 0; - - in_use[aval] = 1; - if (aval > amax) - amax = aval; - } - } - - /* If the buffers match then the colormaps must too. */ - if (match) - { - /* Do the color-maps match, entry by entry? Only check the 'in_use' - * entries. An error here should be logged as a color-map error. - */ - png_const_bytep a_cmap = (png_const_bytep)a->colormap; - png_const_bytep b_cmap = (png_const_bytep)b->colormap; - int result = 1; /* match by default */ - - /* This is used in logpixel to get the error message correct. */ - tr.is_palette = 1; - - for (y=0; y<256; ++y, a_cmap += a_sample, b_cmap += b_sample) - if (in_use[y]) - { - /* The colormap entries should be valid, but because libpng doesn't - * do any checking at present the original image may contain invalid - * pixel values. These cause an error here (at present) unless - * accumulating errors in which case the program just ignores them. - */ - if (y >= a->image.colormap_entries) - { - if ((a->opts & ACCUMULATE) == 0) - { - char pindex[9]; - sprintf(pindex, "%lu[%lu]", (unsigned long)y, - (unsigned long)a->image.colormap_entries); - logerror(a, a->file_name, ": bad pixel index: ", pindex); - } - result = 0; - } - - else if (y >= b->image.colormap_entries) - { - if ((a->opts & ACCUMULATE) == 0) - { - char pindex[9]; - sprintf(pindex, "%lu[%lu]", (unsigned long)y, - (unsigned long)b->image.colormap_entries); - logerror(b, b->file_name, ": bad pixel index: ", pindex); - } - result = 0; - } - - /* All the mismatches are logged here; there can only be 256! */ - else if (!cmppixel(&tr, a_cmap, b_cmap, 0, y)) - result = 0; - } - - /* If reqested copy the error values back from the Transform. */ - if (a->opts & ACCUMULATE) - { - tr.error_ptr[0] = tr.error[0]; - tr.error_ptr[1] = tr.error[1]; - tr.error_ptr[2] = tr.error[2]; - tr.error_ptr[3] = tr.error[3]; - result = 1; /* force a continue */ - } - - return result; - } - - /* else the image buffers don't match pixel-wise so compare sample values - * instead, but first validate that the pixel indexes are in range (but - * only if not accumulating, when the error is ignored.) - */ - else if ((a->opts & ACCUMULATE) == 0) - { - /* Check the original image first, - * TODO: deal with input images with bad pixel values? - */ - if (amax >= a->image.colormap_entries) - { - char pindex[9]; - sprintf(pindex, "%d[%lu]", amax, - (unsigned long)a->image.colormap_entries); - return logerror(a, a->file_name, ": bad pixel index: ", pindex); - } - - else if (bmax >= b->image.colormap_entries) - { - char pindex[9]; - sprintf(pindex, "%d[%lu]", bmax, - (unsigned long)b->image.colormap_entries); - return logerror(b, b->file_name, ": bad pixel index: ", pindex); - } - } - } - - /* We can directly compare pixel values without the need to use the read - * or transform support (i.e. a memory compare) if: - * - * 1) The bit depth has not changed. - * 2) RGB to grayscale has not been done (the reverse is ok; we just compare - * the three RGB values to the original grayscale.) - * 3) An alpha channel has not been removed from an 8-bit format, or the - * 8-bit alpha value of the pixel was 255 (opaque). - * - * If an alpha channel has been *added* then it must have the relevant opaque - * value (255 or 65535). - * - * The fist two the tests (in the order given above) (using the boolean - * equivalence !a && !b == !(a || b)) - */ - if (!(((formata ^ formatb) & PNG_FORMAT_FLAG_LINEAR) | - (formata & (formatb ^ PNG_FORMAT_FLAG_COLOR) & PNG_FORMAT_FLAG_COLOR))) - { - /* Was an alpha channel changed? */ - const png_uint_32 alpha_changed = (formata ^ formatb) & - PNG_FORMAT_FLAG_ALPHA; - - /* Was an alpha channel removed? (The third test.) If so the direct - * comparison is only possible if the input alpha is opaque. - */ - alpha_removed = (formata & alpha_changed) != 0; - - /* Was an alpha channel added? */ - alpha_added = (formatb & alpha_changed) != 0; - - /* The channels may have been moved between input and output, this finds - * out how, recording the result in the btoa array, which says where in - * 'a' to find each channel of 'b'. If alpha was added then btoa[alpha] - * ends up as 4 (and is not used.) - */ - { - int i; - png_byte aloc[4]; - png_byte bloc[4]; - - /* The following are used only if the formats match, except that - * 'bchannels' is a flag for matching formats. btoa[x] says, for each - * channel in b, where to find the corresponding value in a, for the - * bchannels. achannels may be different for a gray to rgb transform - * (a will be 1 or 2, b will be 3 or 4 channels.) - */ - (void)component_loc(aloc, formata); - bchannels = component_loc(bloc, formatb); - - /* Hence the btoa array. */ - for (i=0; i<4; ++i) if (bloc[i] < 4) - btoa[bloc[i]] = aloc[i]; /* may be '4' for alpha */ - - if (alpha_added) - alpha_added = bloc[0]; /* location of alpha channel in image b */ - - else - alpha_added = 4; /* Won't match an image b channel */ - - if (alpha_removed) - alpha_removed = aloc[0]; /* location of alpha channel in image a */ - - else - alpha_removed = 4; - } - } - - else - { - /* Direct compare is not possible, cancel out all the corresponding local - * variables. - */ - bchannels = 0; - alpha_removed = alpha_added = 4; - btoa[3] = btoa[2] = btoa[1] = btoa[0] = 4; /* 4 == not present */ - } - - for (y=0; y<height; ++y, rowa += stridea, rowb += strideb) - { - png_const_bytep ppa, ppb; - png_uint_32 x; - - for (x=0, ppa=rowa, ppb=rowb; x<width; ++x) - { - png_const_bytep psa, psb; - - if (formata & PNG_FORMAT_FLAG_COLORMAP) - psa = (png_const_bytep)a->colormap + a_sample * *ppa++; - else - psa = ppa, ppa += a_sample; - - if (formatb & PNG_FORMAT_FLAG_COLORMAP) - psb = (png_const_bytep)b->colormap + b_sample * *ppb++; - else - psb = ppb, ppb += b_sample; - - /* Do the fast test if possible. */ - if (bchannels) - { - /* Check each 'b' channel against either the corresponding 'a' - * channel or the opaque alpha value, as appropriate. If - * alpha_removed value is set (not 4) then also do this only if the - * 'a' alpha channel (alpha_removed) is opaque; only relevant for - * the 8-bit case. - */ - if (formatb & PNG_FORMAT_FLAG_LINEAR) /* 16-bit checks */ - { - png_const_uint_16p pua = aligncastconst(png_const_uint_16p, psa); - png_const_uint_16p pub = aligncastconst(png_const_uint_16p, psb); - - switch (bchannels) - { - case 4: - if (pua[btoa[3]] != pub[3]) break; - case 3: - if (pua[btoa[2]] != pub[2]) break; - case 2: - if (pua[btoa[1]] != pub[1]) break; - case 1: - if (pua[btoa[0]] != pub[0]) break; - if (alpha_added != 4 && pub[alpha_added] != 65535) break; - continue; /* x loop */ - default: - break; /* impossible */ - } - } - - else if (alpha_removed == 4 || psa[alpha_removed] == 255) - { - switch (bchannels) - { - case 4: - if (psa[btoa[3]] != psb[3]) break; - case 3: - if (psa[btoa[2]] != psb[2]) break; - case 2: - if (psa[btoa[1]] != psb[1]) break; - case 1: - if (psa[btoa[0]] != psb[0]) break; - if (alpha_added != 4 && psb[alpha_added] != 255) break; - continue; /* x loop */ - default: - break; /* impossible */ - } - } - } - - /* If we get to here the fast match failed; do the slow match for this - * pixel. - */ - if (!cmppixel(&tr, psa, psb, x, y) && (a->opts & KEEP_GOING) == 0) - return 0; /* error case */ - } - } - - /* If reqested copy the error values back from the Transform. */ - if (a->opts & ACCUMULATE) - { - tr.error_ptr[0] = tr.error[0]; - tr.error_ptr[1] = tr.error[1]; - tr.error_ptr[2] = tr.error[2]; - tr.error_ptr[3] = tr.error[3]; - } - - return 1; -} - -/* Read the file; how the read gets done depends on which of input_file and - * input_memory have been set. - */ -static int -read_file(Image *image, png_uint_32 format, png_const_colorp background) -{ - memset(&image->image, 0, sizeof image->image); - image->image.version = PNG_IMAGE_VERSION; - - if (image->input_memory != NULL) - { - if (!png_image_begin_read_from_memory(&image->image, image->input_memory, - image->input_memory_size)) - return logerror(image, "memory init: ", image->file_name, ""); - } - -# ifdef PNG_STDIO_SUPPORTED - else if (image->input_file != NULL) - { - if (!png_image_begin_read_from_stdio(&image->image, image->input_file)) - return logerror(image, "stdio init: ", image->file_name, ""); - } - - else - { - if (!png_image_begin_read_from_file(&image->image, image->file_name)) - return logerror(image, "file init: ", image->file_name, ""); - } -# else - else - { - return logerror(image, "unsupported file/stdio init: ", - image->file_name, ""); - } -# endif - - /* This must be set after the begin_read call: */ - if (image->opts & sRGB_16BIT) - image->image.flags |= PNG_IMAGE_FLAG_16BIT_sRGB; - - /* Have an initialized image with all the data we need plus, maybe, an - * allocated file (myfile) or buffer (mybuffer) that need to be freed. - */ - { - int result; - png_uint_32 image_format; - - /* Print both original and output formats. */ - image_format = image->image.format; - - if (image->opts & VERBOSE) - { - printf("%s %lu x %lu %s -> %s", image->file_name, - (unsigned long)image->image.width, - (unsigned long)image->image.height, - format_names[image_format & FORMAT_MASK], - (format & FORMAT_NO_CHANGE) != 0 || image->image.format == format - ? "no change" : format_names[format & FORMAT_MASK]); - - if (background != NULL) - printf(" background(%d,%d,%d)\n", background->red, - background->green, background->blue); - else - printf("\n"); - - fflush(stdout); - } - - /* 'NO_CHANGE' combined with the color-map flag forces the base format - * flags to be set on read to ensure that the original representation is - * not lost in the pass through a colormap format. - */ - if ((format & FORMAT_NO_CHANGE) != 0) - { - if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && - (image_format & PNG_FORMAT_FLAG_COLORMAP) != 0) - format = (image_format & ~BASE_FORMATS) | (format & BASE_FORMATS); - - else - format = image_format; - } - - image->image.format = format; - - image->stride = PNG_IMAGE_ROW_STRIDE(image->image) + image->stride_extra; - allocbuffer(image); - - result = png_image_finish_read(&image->image, background, - image->buffer+16, (png_int_32)image->stride, image->colormap); - - checkbuffer(image, image->file_name); - - if (result) - return checkopaque(image); - - else - return logerror(image, image->file_name, ": image read failed", ""); - } -} - -/* Reads from a filename, which must be in image->file_name, but uses - * image->opts to choose the method. The file is always read in its native - * format (the one the simplified API suggests). - */ -static int -read_one_file(Image *image) -{ - if (!(image->opts & READ_FILE) || (image->opts & USE_STDIO)) - { - /* memory or stdio. */ - FILE *f = fopen(image->file_name, "rb"); - - if (f != NULL) - { - if (image->opts & READ_FILE) - image->input_file = f; - - else /* memory */ - { - if (fseek(f, 0, SEEK_END) == 0) - { - long int cb = ftell(f); - - if (cb > 0) - { - if ((unsigned long int)cb <= (size_t)~(size_t)0) - { - png_bytep b = voidcast(png_bytep, malloc((size_t)cb)); - - if (b != NULL) - { - rewind(f); - - if (fread(b, (size_t)cb, 1, f) == 1) - { - fclose(f); - image->input_memory_size = cb; - image->input_memory = b; - } - - else - { - free(b); - return logclose(image, f, image->file_name, - ": read failed: "); - } - } - - else - return logclose(image, f, image->file_name, - ": out of memory: "); - } - - else - return logclose(image, f, image->file_name, - ": file too big for this architecture: "); - /* cb is the length of the file as a (long) and - * this is greater than the maximum amount of - * memory that can be requested from malloc. - */ - } - - else if (cb == 0) - return logclose(image, f, image->file_name, - ": zero length: "); - - else - return logclose(image, f, image->file_name, - ": tell failed: "); - } - - else - return logclose(image, f, image->file_name, ": seek failed: "); - } - } - - else - return logerror(image, image->file_name, ": open failed: ", - strerror(errno)); - } - - return read_file(image, FORMAT_NO_CHANGE, NULL); -} - -#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED -static int -write_one_file(Image *output, Image *image, int convert_to_8bit) -{ - if (image->opts & FAST_WRITE) - image->image.flags |= PNG_IMAGE_FLAG_FAST; - - if (image->opts & USE_STDIO) - { - FILE *f = tmpfile(); - - if (f != NULL) - { - if (png_image_write_to_stdio(&image->image, f, convert_to_8bit, - image->buffer+16, (png_int_32)image->stride, image->colormap)) - { - if (fflush(f) == 0) - { - rewind(f); - initimage(output, image->opts, "tmpfile", image->stride_extra); - output->input_file = f; - if (!checkopaque(image)) - return 0; - } - - else - return logclose(image, f, "tmpfile", ": flush: "); - } - - else - { - fclose(f); - return logerror(image, "tmpfile", ": write failed", ""); - } - } - - else - return logerror(image, "tmpfile", ": open: ", strerror(errno)); - } - - else - { - static int counter = 0; - char name[32]; - - sprintf(name, "%s%d.png", tmpf, ++counter); - - if (png_image_write_to_file(&image->image, name, convert_to_8bit, - image->buffer+16, (png_int_32)image->stride, image->colormap)) - { - initimage(output, image->opts, output->tmpfile_name, - image->stride_extra); - /* Afterwards, or freeimage will delete it! */ - strcpy(output->tmpfile_name, name); - - if (!checkopaque(image)) - return 0; - } - - else - return logerror(image, name, ": write failed", ""); - } - - /* 'output' has an initialized temporary image, read this back in and compare - * this against the original: there should be no change since the original - * format was written unmodified unless 'convert_to_8bit' was specified. - * However, if the original image was color-mapped, a simple read will zap - * the linear, color and maybe alpha flags, this will cause spurious failures - * under some circumstances. - */ - if (read_file(output, image->image.format | FORMAT_NO_CHANGE, NULL)) - { - png_uint_32 original_format = image->image.format; - - if (convert_to_8bit) - original_format &= ~PNG_FORMAT_FLAG_LINEAR; - - if ((output->image.format & BASE_FORMATS) != - (original_format & BASE_FORMATS)) - return logerror(image, image->file_name, ": format changed on read: ", - output->file_name); - - return compare_two_images(image, output, 0/*via linear*/, NULL); - } - - else - return logerror(output, output->tmpfile_name, - ": read of new file failed", ""); -} -#endif - -static int -testimage(Image *image, png_uint_32 opts, format_list *pf) -{ - int result; - Image copy; - - /* Copy the original data, stealing it from 'image' */ - checkopaque(image); - copy = *image; - - copy.opts = opts; - copy.buffer = NULL; - copy.bufsize = 0; - copy.allocsize = 0; - - image->input_file = NULL; - image->input_memory = NULL; - image->input_memory_size = 0; - image->tmpfile_name[0] = 0; - - { - png_uint_32 counter; - Image output; - - newimage(&output); - - result = 1; - - /* Use the low bit of 'counter' to indicate whether or not to do alpha - * removal with a background color or by composting onto the image; this - * step gets skipped if it isn't relevant - */ - for (counter=0; counter<2*FORMAT_COUNT; ++counter) - if (format_isset(pf, counter >> 1)) - { - png_uint_32 format = counter >> 1; - - png_color background_color; - png_colorp background = NULL; - - /* If there is a format change that removes the alpha channel then - * the background is relevant. If the output is 8-bit color-mapped - * then a background color *must* be provided, otherwise there are - * two tests to do - one with a color, the other with NULL. The - * NULL test happens second. - */ - if ((counter & 1) == 0) - { - if ((format & PNG_FORMAT_FLAG_ALPHA) == 0 && - (image->image.format & PNG_FORMAT_FLAG_ALPHA) != 0) - { - /* Alpha/transparency will be removed, the background is - * relevant: make it a color the first time - */ - random_color(&background_color); - background = &background_color; - - /* BUT if the output is to a color-mapped 8-bit format then - * the background must always be a color, so increment 'counter' - * to skip the NULL test. - */ - if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && - (format & PNG_FORMAT_FLAG_LINEAR) == 0) - ++counter; - } - - /* Otherwise an alpha channel is not being eliminated, just leave - * background NULL and skip the (counter & 1) NULL test. - */ - else - ++counter; - } - /* else just use NULL for background */ - - resetimage(©); - copy.opts = opts; /* in case read_file needs to change it */ - - result = read_file(©, format, background); - if (!result) - break; - - /* Make sure the file just read matches the original file. */ - result = compare_two_images(image, ©, 0/*via linear*/, background); - if (!result) - break; - -# ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED - /* Write the *copy* just made to a new file to make sure the write - * side works ok. Check the conversion to sRGB if the copy is - * linear. - */ - output.opts = opts; - result = write_one_file(&output, ©, 0/*convert to 8bit*/); - if (!result) - break; - - /* Validate against the original too; the background is needed here - * as well so that compare_two_images knows what color was used. - */ - result = compare_two_images(image, &output, 0, background); - if (!result) - break; - - if ((format & PNG_FORMAT_FLAG_LINEAR) != 0 && - (format & PNG_FORMAT_FLAG_COLORMAP) == 0) - { - /* 'output' is linear, convert to the corresponding sRGB format. - */ - output.opts = opts; - result = write_one_file(&output, ©, 1/*convert to 8bit*/); - if (!result) - break; - - /* This may involve a conversion via linear; in the ideal world - * this would round-trip correctly, but libpng 1.5.7 is not the - * ideal world so allow a drift (error_via_linear). - * - * 'image' has an alpha channel but 'output' does not then there - * will a strip-alpha-channel operation (because 'output' is - * linear), handle this by composing on black when doing the - * comparison. - */ - result = compare_two_images(image, &output, 1/*via_linear*/, - background); - if (!result) - break; - } -# endif /* PNG_SIMPLIFIED_WRITE_SUPPORTED */ - } - - freeimage(&output); - } - - freeimage(©); - - return result; -} - -static int -test_one_file(const char *file_name, format_list *formats, png_uint_32 opts, - int stride_extra, int log_pass) -{ - int result; - Image image; - - newimage(&image); - initimage(&image, opts, file_name, stride_extra); - result = read_one_file(&image); - if (result) - result = testimage(&image, opts, formats); - freeimage(&image); - - /* Ensure that stderr is flushed into any log file */ - fflush(stderr); - - if (log_pass) - { - if (result) - printf("PASS:"); - - else - printf("FAIL:"); - -# ifndef PNG_SIMPLIFIED_WRITE_SUPPORTED - printf(" (no write)"); -# endif - - print_opts(opts); - printf(" %s\n", file_name); - /* stdout may not be line-buffered if it is piped to a file, so: */ - fflush(stdout); - } - - else if (!result) - exit(1); - - return result; -} - -int -main(int argc, char **argv) -{ - png_uint_32 opts = FAST_WRITE; - format_list formats; - const char *touch = NULL; - int log_pass = 0; - int redundant = 0; - int stride_extra = 0; - int retval = 0; - int c; - - init_sRGB_to_d(); -#if 0 - init_error_via_linear(); -#endif - format_init(&formats); - - for (c=1; c<argc; ++c) - { - const char *arg = argv[c]; - - if (strcmp(arg, "--log") == 0) - log_pass = 1; - else if (strcmp(arg, "--fresh") == 0) - { - memset(gpc_error, 0, sizeof gpc_error); - memset(gpc_error_via_linear, 0, sizeof gpc_error_via_linear); - } - else if (strcmp(arg, "--file") == 0) -# ifdef PNG_STDIO_SUPPORTED - opts |= READ_FILE; -# else - return 77; /* skipped: no support */ -# endif - else if (strcmp(arg, "--memory") == 0) - opts &= ~READ_FILE; - else if (strcmp(arg, "--stdio") == 0) -# ifdef PNG_STDIO_SUPPORTED - opts |= USE_STDIO; -# else - return 77; /* skipped: no support */ -# endif - else if (strcmp(arg, "--name") == 0) - opts &= ~USE_STDIO; - else if (strcmp(arg, "--verbose") == 0) - opts |= VERBOSE; - else if (strcmp(arg, "--quiet") == 0) - opts &= ~VERBOSE; - else if (strcmp(arg, "--preserve") == 0) - opts |= KEEP_TMPFILES; - else if (strcmp(arg, "--nopreserve") == 0) - opts &= ~KEEP_TMPFILES; - else if (strcmp(arg, "--keep-going") == 0) - opts |= KEEP_GOING; - else if (strcmp(arg, "--fast") == 0) - opts |= FAST_WRITE; - else if (strcmp(arg, "--slow") == 0) - opts &= ~FAST_WRITE; - else if (strcmp(arg, "--accumulate") == 0) - opts |= ACCUMULATE; - else if (strcmp(arg, "--redundant") == 0) - redundant = 1; - else if (strcmp(arg, "--stop") == 0) - opts &= ~KEEP_GOING; - else if (strcmp(arg, "--strict") == 0) - opts |= STRICT; - else if (strcmp(arg, "--sRGB-16bit") == 0) - opts |= sRGB_16BIT; - else if (strcmp(arg, "--linear-16bit") == 0) - opts &= ~sRGB_16BIT; - else if (strcmp(arg, "--tmpfile") == 0) - { - if (c+1 < argc) - { - if (strlen(argv[++c]) >= sizeof tmpf) - { - fflush(stdout); - fprintf(stderr, "%s: %s is too long for a temp file prefix\n", - argv[0], argv[c]); - exit(99); - } - - /* Safe: checked above */ - strcpy(tmpf, argv[c]); - } - - else - { - fflush(stdout); - fprintf(stderr, "%s: %s requires a temporary file prefix\n", - argv[0], arg); - exit(99); - } - } - else if (strcmp(arg, "--touch") == 0) - { - if (c+1 < argc) - touch = argv[++c]; - - else - { - fflush(stdout); - fprintf(stderr, "%s: %s requires a file name argument\n", - argv[0], arg); - exit(99); - } - } - else if (arg[0] == '+') - { - png_uint_32 format = formatof(arg+1); - - if (format > FORMAT_COUNT) - exit(99); - - format_set(&formats, format); - } - else if (arg[0] == '-' && arg[1] != 0 && (arg[1] != '0' || arg[2] != 0)) - { - fflush(stdout); - fprintf(stderr, "%s: unknown option: %s\n", argv[0], arg); - exit(99); - } - else - { - if (format_is_initial(&formats)) - format_default(&formats, redundant); - - if (arg[0] == '-') - { - const int term = (arg[1] == '0' ? 0 : '\n'); - unsigned int ich = 0; - - /* Loop reading files, use a static buffer to simplify this and just - * stop if the name gets to long. - */ - static char buffer[4096]; - - do - { - int ch = getchar(); - - /* Don't allow '\0' in file names, and terminate with '\n' or, - * for -0, just '\0' (use -print0 to find to make this work!) - */ - if (ch == EOF || ch == term || ch == 0) - { - buffer[ich] = 0; - - if (ich > 0 && !test_one_file(buffer, &formats, opts, - stride_extra, log_pass)) - retval = 1; - - if (ch == EOF) - break; - - ich = 0; - --ich; /* so that the increment below sets it to 0 again */ - } - - else - buffer[ich] = (char)ch; - } while (++ich < sizeof buffer); - - if (ich) - { - buffer[32] = 0; - buffer[4095] = 0; - fprintf(stderr, "%s...%s: file name too long\n", buffer, - buffer+(4096-32)); - exit(99); - } - } - - else if (!test_one_file(arg, &formats, opts, stride_extra, log_pass)) - retval = 1; - } - } - - if (opts & ACCUMULATE) - { - unsigned int in; - - printf("static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] =\n"); - printf("{\n"); - for (in=0; in<16; ++in) - { - unsigned int out; - printf(" { /* input: %s */\n ", format_names[in]); - for (out=0; out<16; ++out) - { - unsigned int alpha; - printf(" {"); - for (alpha=0; alpha<4; ++alpha) - { - printf(" %d", gpc_error[in][out][alpha]); - if (alpha < 3) putchar(','); - } - printf(" }"); - if (out < 15) - { - putchar(','); - if (out % 4 == 3) printf("\n "); - } - } - printf("\n }"); - - if (in < 15) - putchar(','); - else - putchar('\n'); - } - printf("};\n"); - - printf("static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] =\n"); - printf("{\n"); - for (in=0; in<16; ++in) - { - unsigned int out; - printf(" { /* input: %s */\n ", format_names[in]); - for (out=0; out<4; ++out) - { - unsigned int alpha; - printf(" {"); - for (alpha=0; alpha<4; ++alpha) - { - printf(" %d", gpc_error_via_linear[in][out][alpha]); - if (alpha < 3) putchar(','); - } - printf(" }"); - if (out < 3) - putchar(','); - } - printf("\n }"); - - if (in < 15) - putchar(','); - else - putchar('\n'); - } - printf("};\n"); - - printf("static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] =\n"); - printf("{\n"); - for (in=0; in<8; ++in) - { - unsigned int out; - printf(" { /* input: %s */\n ", format_names[in]); - for (out=0; out<8; ++out) - { - unsigned int alpha; - printf(" {"); - for (alpha=0; alpha<4; ++alpha) - { - printf(" %d", gpc_error_to_colormap[in][out][alpha]); - if (alpha < 3) putchar(','); - } - printf(" }"); - if (out < 7) - { - putchar(','); - if (out % 4 == 3) printf("\n "); - } - } - printf("\n }"); - - if (in < 7) - putchar(','); - else - putchar('\n'); - } - printf("};\n"); - } - - if (retval == 0 && touch != NULL) - { - FILE *fsuccess = fopen(touch, "wt"); - - if (fsuccess != NULL) - { - int error = 0; - fprintf(fsuccess, "PNG simple API tests succeeded\n"); - fflush(fsuccess); - error = ferror(fsuccess); - - if (fclose(fsuccess) || error) - { - fflush(stdout); - fprintf(stderr, "%s: write failed\n", touch); - exit(99); - } - } - - else - { - fflush(stdout); - fprintf(stderr, "%s: open failed\n", touch); - exit(99); - } - } - - return retval; -} - -#else /* !PNG_SIMPLIFIED_READ_SUPPORTED */ -int main(void) -{ - fprintf(stderr, "pngstest: no read support in libpng, test skipped\n"); - /* So the test is skipped: */ - return 77; -} -#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngunknown.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngunknown.c deleted file mode 100644 index b8c4899de77..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngunknown.c +++ /dev/null @@ -1,1245 +0,0 @@ - -/* pngunknown.c - test the read side unknown chunk handling - * - * Last changed in libpng 1.6.10 [March 6, 2014] - * Copyright (c) 2014 Glenn Randers-Pehrson - * Written by John Cunningham Bowler - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * NOTES: - * This is a C program that is intended to be linked against libpng. It - * allows the libpng unknown handling code to be tested by interpreting - * arguments to save or discard combinations of chunks. The program is - * currently just a minimal validation for the built-in libpng facilities. - */ - -#include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include <setjmp.h> - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -/* Since this program tests the ability to change the unknown chunk handling - * these must be defined: - */ -#if defined(PNG_SET_UNKNOWN_CHUNKS_SUPPORTED) &&\ - defined(PNG_READ_SUPPORTED) - -/* One of these must be defined to allow us to find out what happened. It is - * still useful to set unknown chunk handling without either of these in order - * to cause *known* chunks to be discarded. This can be a significant - * efficiency gain, but it can't really be tested here. - */ -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) ||\ - defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) - -#if PNG_LIBPNG_VER < 10500 -/* This deliberately lacks the PNG_CONST. */ -typedef png_byte *png_const_bytep; - -/* This is copied from 1.5.1 png.h: */ -#define PNG_INTERLACE_ADAM7_PASSES 7 -#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) -#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) -#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) -#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) -#define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\ - -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass)) -#define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\ - -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass)) -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) -#define PNG_COL_FROM_PASS_COL(xIn, pass) \ - (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) -#define PNG_PASS_MASK(pass,off) ( \ - ((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \ - ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) -#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ - ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) -#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ - ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) - -/* These are needed too for the default build: */ -#define PNG_WRITE_16BIT_SUPPORTED -#define PNG_READ_16BIT_SUPPORTED - -/* This comes from pnglibconf.h afer 1.5: */ -#define PNG_FP_1 100000 -#define PNG_GAMMA_THRESHOLD_FIXED\ - ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) -#endif - -#if PNG_LIBPNG_VER < 10600 - /* 1.6.0 constifies many APIs. The following exists to allow pngvalid to be - * compiled against earlier versions. - */ -# define png_const_structp png_structp -#endif - -#if PNG_LIBPNG_VER < 10700 - /* Copied from libpng 1.7.0 png.h */ -#define PNG_u2(b1, b2) (((unsigned int)(b1) << 8) + (b2)) - -#define PNG_U16(b1, b2) ((png_uint_16)PNG_u2(b1, b2)) -#define PNG_U32(b1, b2, b3, b4)\ - (((png_uint_32)PNG_u2(b1, b2) << 16) + PNG_u2(b3, b4)) - -/* Constants for known chunk types. - */ -#define png_IDAT PNG_U32( 73, 68, 65, 84) -#define png_IEND PNG_U32( 73, 69, 78, 68) -#define png_IHDR PNG_U32( 73, 72, 68, 82) -#define png_PLTE PNG_U32( 80, 76, 84, 69) -#define png_bKGD PNG_U32( 98, 75, 71, 68) -#define png_cHRM PNG_U32( 99, 72, 82, 77) -#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */ -#define png_gAMA PNG_U32(103, 65, 77, 65) -#define png_gIFg PNG_U32(103, 73, 70, 103) -#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */ -#define png_gIFx PNG_U32(103, 73, 70, 120) -#define png_hIST PNG_U32(104, 73, 83, 84) -#define png_iCCP PNG_U32(105, 67, 67, 80) -#define png_iTXt PNG_U32(105, 84, 88, 116) -#define png_oFFs PNG_U32(111, 70, 70, 115) -#define png_pCAL PNG_U32(112, 67, 65, 76) -#define png_pHYs PNG_U32(112, 72, 89, 115) -#define png_sBIT PNG_U32(115, 66, 73, 84) -#define png_sCAL PNG_U32(115, 67, 65, 76) -#define png_sPLT PNG_U32(115, 80, 76, 84) -#define png_sRGB PNG_U32(115, 82, 71, 66) -#define png_sTER PNG_U32(115, 84, 69, 82) -#define png_tEXt PNG_U32(116, 69, 88, 116) -#define png_tIME PNG_U32(116, 73, 77, 69) -#define png_tRNS PNG_U32(116, 82, 78, 83) -#define png_zTXt PNG_U32(122, 84, 88, 116) - -/* Test on flag values as defined in the spec (section 5.4): */ -#define PNG_CHUNK_ANCILLARY(c) (1 & ((c) >> 29)) -#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLARY(c)) -#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) -#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) -#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) - -#endif /* PNG_LIBPNG_VER < 10700 */ - -#ifdef __cplusplus -# define this not_the_cpp_this -# define new not_the_cpp_new -# define voidcast(type, value) static_cast<type>(value) -#else -# define voidcast(type, value) (value) -#endif /* __cplusplus */ - -/* Unused formal parameter errors are removed using the following macro which is - * expected to have no bad effects on performance. - */ -#ifndef UNUSED -# if defined(__GNUC__) || defined(_MSC_VER) -# define UNUSED(param) (void)param; -# else -# define UNUSED(param) -# endif -#endif - -/* Types of chunks not known to libpng */ -#define png_vpAg PNG_U32(118, 112, 65, 103) - -/* Chunk information */ -#define PNG_INFO_tEXt 0x10000000U -#define PNG_INFO_iTXt 0x20000000U -#define PNG_INFO_zTXt 0x40000000U - -#define PNG_INFO_sTER 0x01000000U -#define PNG_INFO_vpAg 0x02000000U - -#define ABSENT 0 -#define START 1 -#define END 2 - -static struct -{ - char name[5]; - png_uint_32 flag; - png_uint_32 tag; - int unknown; /* Chunk not known to libpng */ - int all; /* Chunk set by the '-1' option */ - int position; /* position in pngtest.png */ - int keep; /* unknown handling setting */ -} chunk_info[] = { - /* Critical chunks */ - { "IDAT", PNG_INFO_IDAT, png_IDAT, 0, 0, START, 0 }, /* must be [0] */ - { "PLTE", PNG_INFO_PLTE, png_PLTE, 0, 0, ABSENT, 0 }, - - /* Non-critical chunks that libpng handles */ - /* This is a mess but it seems to be the only way to do it - there is no way - * to check for a definition outside a #if. - */ - { "bKGD", PNG_INFO_bKGD, png_bKGD, -# ifdef PNG_READ_bKGD_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "cHRM", PNG_INFO_cHRM, png_cHRM, -# ifdef PNG_READ_cHRM_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "gAMA", PNG_INFO_gAMA, png_gAMA, -# ifdef PNG_READ_gAMA_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "hIST", PNG_INFO_hIST, png_hIST, -# ifdef PNG_READ_hIST_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "iCCP", PNG_INFO_iCCP, png_iCCP, -# ifdef PNG_READ_iCCP_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "iTXt", PNG_INFO_iTXt, png_iTXt, -# ifdef PNG_READ_iTXt_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "oFFs", PNG_INFO_oFFs, png_oFFs, -# ifdef PNG_READ_oFFs_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "pCAL", PNG_INFO_pCAL, png_pCAL, -# ifdef PNG_READ_pCAL_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "pHYs", PNG_INFO_pHYs, png_pHYs, -# ifdef PNG_READ_pHYs_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "sBIT", PNG_INFO_sBIT, png_sBIT, -# ifdef PNG_READ_sBIT_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "sCAL", PNG_INFO_sCAL, png_sCAL, -# ifdef PNG_READ_sCAL_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "sPLT", PNG_INFO_sPLT, png_sPLT, -# ifdef PNG_READ_sPLT_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "sRGB", PNG_INFO_sRGB, png_sRGB, -# ifdef PNG_READ_sRGB_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "tEXt", PNG_INFO_tEXt, png_tEXt, -# ifdef PNG_READ_tEXt_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "tIME", PNG_INFO_tIME, png_tIME, -# ifdef PNG_READ_tIME_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "tRNS", PNG_INFO_tRNS, png_tRNS, -# ifdef PNG_READ_tRNS_SUPPORTED - 0, -# else - 1, -# endif - 0, ABSENT, 0 }, - { "zTXt", PNG_INFO_zTXt, png_zTXt, -# ifdef PNG_READ_zTXt_SUPPORTED - 0, -# else - 1, -# endif - 1, END, 0 }, - - /* No libpng handling */ - { "sTER", PNG_INFO_sTER, png_sTER, 1, 1, START, 0 }, - { "vpAg", PNG_INFO_vpAg, png_vpAg, 1, 0, START, 0 }, -}; - -#define NINFO ((int)((sizeof chunk_info)/(sizeof chunk_info[0]))) - -static void -clear_keep(void) -{ - int i = NINFO; - while (--i >= 0) - chunk_info[i].keep = 0; -} - -static int -find(const char *name) -{ - int i = NINFO; - while (--i >= 0) - { - if (memcmp(chunk_info[i].name, name, 4) == 0) - break; - } - - return i; -} - -static int -findb(const png_byte *name) -{ - int i = NINFO; - while (--i >= 0) - { - if (memcmp(chunk_info[i].name, name, 4) == 0) - break; - } - - return i; -} - -static int -find_by_flag(png_uint_32 flag) -{ - int i = NINFO; - - while (--i >= 0) if (chunk_info[i].flag == flag) return i; - - fprintf(stderr, "pngunknown: internal error\n"); - exit(4); -} - -static int -ancillary(const char *name) -{ - return PNG_CHUNK_ANCILLARY(PNG_U32(name[0], name[1], name[2], name[3])); -} - -#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED -static int -ancillaryb(const png_byte *name) -{ - return PNG_CHUNK_ANCILLARY(PNG_U32(name[0], name[1], name[2], name[3])); -} -#endif - -/* Type of an error_ptr */ -typedef struct -{ - jmp_buf error_return; - png_structp png_ptr; - png_infop info_ptr, end_ptr; - png_uint_32 before_IDAT; - png_uint_32 after_IDAT; - int error_count; - int warning_count; - int keep; /* the default value */ - const char *program; - const char *file; - const char *test; -} display; - -static const char init[] = "initialization"; -static const char cmd[] = "command line"; - -static void -init_display(display *d, const char *program) -{ - memset(d, 0, sizeof *d); - d->png_ptr = NULL; - d->info_ptr = d->end_ptr = NULL; - d->error_count = d->warning_count = 0; - d->program = program; - d->file = program; - d->test = init; -} - -static void -clean_display(display *d) -{ - png_destroy_read_struct(&d->png_ptr, &d->info_ptr, &d->end_ptr); - - /* This must not happen - it might cause an app crash */ - if (d->png_ptr != NULL || d->info_ptr != NULL || d->end_ptr != NULL) - { - fprintf(stderr, "%s(%s): png_destroy_read_struct error\n", d->file, - d->test); - exit(1); - } -} - -PNG_FUNCTION(void, display_exit, (display *d), static PNG_NORETURN) -{ - ++(d->error_count); - - if (d->png_ptr != NULL) - clean_display(d); - - /* During initialization and if this is a single command line argument set - * exit now - there is only one test, otherwise longjmp to do the next test. - */ - if (d->test == init || d->test == cmd) - exit(1); - - longjmp(d->error_return, 1); -} - -static int -display_rc(const display *d, int strict) -{ - return d->error_count + (strict ? d->warning_count : 0); -} - -/* libpng error and warning callbacks */ -PNG_FUNCTION(void, (PNGCBAPI error), (png_structp png_ptr, const char *message), - static PNG_NORETURN) -{ - display *d = (display*)png_get_error_ptr(png_ptr); - - fprintf(stderr, "%s(%s): libpng error: %s\n", d->file, d->test, message); - display_exit(d); -} - -static void PNGCBAPI -warning(png_structp png_ptr, const char *message) -{ - display *d = (display*)png_get_error_ptr(png_ptr); - - fprintf(stderr, "%s(%s): libpng warning: %s\n", d->file, d->test, message); - ++(d->warning_count); -} - -static png_uint_32 -get_valid(display *d, png_infop info_ptr) -{ - png_uint_32 flags = png_get_valid(d->png_ptr, info_ptr, (png_uint_32)~0); - - /* Map the text chunks back into the flags */ - { - png_textp text; - png_uint_32 ntext = png_get_text(d->png_ptr, info_ptr, &text, NULL); - - while (ntext-- > 0) switch (text[ntext].compression) - { - case -1: - flags |= PNG_INFO_tEXt; - break; - case 0: - flags |= PNG_INFO_zTXt; - break; - case 1: - case 2: - flags |= PNG_INFO_iTXt; - break; - default: - fprintf(stderr, "%s(%s): unknown text compression %d\n", d->file, - d->test, text[ntext].compression); - display_exit(d); - } - } - - return flags; -} - -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED -static int PNGCBAPI -read_callback(png_structp pp, png_unknown_chunkp pc) -{ - /* This function mimics the behavior of png_set_keep_unknown_chunks by - * returning '0' to keep the chunk and '1' to discard it. - */ - display *d = voidcast(display*, png_get_user_chunk_ptr(pp)); - int chunk = findb(pc->name); - int keep, discard; - - if (chunk < 0) /* not one in our list, so not a known chunk */ - keep = d->keep; - - else - { - keep = chunk_info[chunk].keep; - if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT) - { - /* See the comments in png.h - use the default for unknown chunks, - * do not keep known chunks. - */ - if (chunk_info[chunk].unknown) - keep = d->keep; - - else - keep = PNG_HANDLE_CHUNK_NEVER; - } - } - - switch (keep) - { - default: - fprintf(stderr, "%s(%s): %d: unrecognized chunk option\n", d->file, - d->test, chunk_info[chunk].keep); - display_exit(d); - - case PNG_HANDLE_CHUNK_AS_DEFAULT: - case PNG_HANDLE_CHUNK_NEVER: - discard = 1/*handled; discard*/; - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - case PNG_HANDLE_CHUNK_ALWAYS: - discard = 0/*not handled; keep*/; - break; - } - - /* Also store information about this chunk in the display, the relevant flag - * is set if the chunk is to be kept ('not handled'.) - */ - if (chunk >= 0) if (!discard) /* stupidity to stop a GCC warning */ - { - png_uint_32 flag = chunk_info[chunk].flag; - - if (pc->location & PNG_AFTER_IDAT) - d->after_IDAT |= flag; - - else - d->before_IDAT |= flag; - } - - /* However if there is no support to store unknown chunks don't ask libpng to - * do it; there will be an png_error. - */ -# ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED - return discard; -# else - return 1; /*handled; discard*/ -# endif -} -#endif /* READ_USER_CHUNKS_SUPPORTED */ - -#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED -static png_uint_32 -get_unknown(display *d, png_infop info_ptr, int after_IDAT) -{ - /* Create corresponding 'unknown' flags */ - png_uint_32 flags = 0; - - UNUSED(after_IDAT) - - { - png_unknown_chunkp unknown; - int num_unknown = png_get_unknown_chunks(d->png_ptr, info_ptr, &unknown); - - while (--num_unknown >= 0) - { - int chunk = findb(unknown[num_unknown].name); - - /* Chunks not known to pngunknown must be validated here; since they - * must also be unknown to libpng the 'display->keep' behavior should - * have been used. - */ - if (chunk < 0) switch (d->keep) - { - default: /* impossible */ - case PNG_HANDLE_CHUNK_AS_DEFAULT: - case PNG_HANDLE_CHUNK_NEVER: - fprintf(stderr, "%s(%s): %s: %s: unknown chunk saved\n", - d->file, d->test, d->keep ? "discard" : "default", - unknown[num_unknown].name); - ++(d->error_count); - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - if (!ancillaryb(unknown[num_unknown].name)) - { - fprintf(stderr, - "%s(%s): if-safe: %s: unknown critical chunk saved\n", - d->file, d->test, unknown[num_unknown].name); - ++(d->error_count); - break; - } - /* FALL THROUGH (safe) */ - case PNG_HANDLE_CHUNK_ALWAYS: - break; - } - - else - flags |= chunk_info[chunk].flag; - } - } - - return flags; -} -#else -static png_uint_32 -get_unknown(display *d, png_infop info_ptr, int after_IDAT) - /* Otherwise this will return the cached values set by any user callback */ -{ - UNUSED(info_ptr); - - if (after_IDAT) - return d->after_IDAT; - - else - return d->before_IDAT; -} - -# ifndef PNG_READ_USER_CHUNKS_SUPPORTED - /* The #defines above should mean this is never reached, it's just here as - * a check to ensure the logic is correct. - */ -# error No store support and no user chunk support, this will not work -# endif -#endif - -static int -check(FILE *fp, int argc, const char **argv, png_uint_32p flags/*out*/, - display *d, int set_callback) -{ - int i, npasses, ipass; - png_uint_32 height; - - d->keep = PNG_HANDLE_CHUNK_AS_DEFAULT; - d->before_IDAT = 0; - d->after_IDAT = 0; - - /* Some of these errors are permanently fatal and cause an exit here, others - * are per-test and cause an error return. - */ - d->png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, d, error, - warning); - if (d->png_ptr == NULL) - { - fprintf(stderr, "%s(%s): could not allocate png struct\n", d->file, - d->test); - /* Terminate here, this error is not test specific. */ - exit(1); - } - - d->info_ptr = png_create_info_struct(d->png_ptr); - d->end_ptr = png_create_info_struct(d->png_ptr); - if (d->info_ptr == NULL || d->end_ptr == NULL) - { - fprintf(stderr, "%s(%s): could not allocate png info\n", d->file, - d->test); - clean_display(d); - exit(1); - } - - png_init_io(d->png_ptr, fp); - -# ifdef PNG_READ_USER_CHUNKS_SUPPORTED - /* This is only done if requested by the caller; it interferes with the - * standard store/save mechanism. - */ - if (set_callback) - png_set_read_user_chunk_fn(d->png_ptr, d, read_callback); -# else - UNUSED(set_callback) -# endif - - /* Handle each argument in turn; multiple settings are possible for the same - * chunk and multiple calls will occur (the last one should override all - * preceding ones). - */ - for (i=0; i<argc; ++i) - { - const char *equals = strchr(argv[i], '='); - - if (equals != NULL) - { - int chunk, option; - - if (strcmp(equals+1, "default") == 0) - option = PNG_HANDLE_CHUNK_AS_DEFAULT; - else if (strcmp(equals+1, "discard") == 0) - option = PNG_HANDLE_CHUNK_NEVER; - else if (strcmp(equals+1, "if-safe") == 0) - option = PNG_HANDLE_CHUNK_IF_SAFE; - else if (strcmp(equals+1, "save") == 0) - option = PNG_HANDLE_CHUNK_ALWAYS; - else - { - fprintf(stderr, "%s(%s): %s: unrecognized chunk option\n", d->file, - d->test, argv[i]); - display_exit(d); - } - - switch (equals - argv[i]) - { - case 4: /* chunk name */ - chunk = find(argv[i]); - - if (chunk >= 0) - { - /* These #if tests have the effect of skipping the arguments - * if SAVE support is unavailable - we can't do a useful test - * in this case, so we just check the arguments! This could - * be improved in the future by using the read callback. - */ - png_byte name[5]; - - memcpy(name, chunk_info[chunk].name, 5); - png_set_keep_unknown_chunks(d->png_ptr, option, name, 1); - chunk_info[chunk].keep = option; - continue; - } - - break; - - case 7: /* default */ - if (memcmp(argv[i], "default", 7) == 0) - { - png_set_keep_unknown_chunks(d->png_ptr, option, NULL, 0); - d->keep = option; - continue; - } - - break; - - case 3: /* all */ - if (memcmp(argv[i], "all", 3) == 0) - { - png_set_keep_unknown_chunks(d->png_ptr, option, NULL, -1); - d->keep = option; - - for (chunk = 0; chunk < NINFO; ++chunk) - if (chunk_info[chunk].all) - chunk_info[chunk].keep = option; - continue; - } - - break; - - default: /* some misplaced = */ - - break; - } - } - - fprintf(stderr, "%s(%s): %s: unrecognized chunk argument\n", d->file, - d->test, argv[i]); - display_exit(d); - } - - png_read_info(d->png_ptr, d->info_ptr); - - switch (png_get_interlace_type(d->png_ptr, d->info_ptr)) - { - case PNG_INTERLACE_NONE: - npasses = 1; - break; - - case PNG_INTERLACE_ADAM7: - npasses = PNG_INTERLACE_ADAM7_PASSES; - break; - - default: - /* Hard error because it is not test specific */ - fprintf(stderr, "%s(%s): invalid interlace type\n", d->file, d->test); - clean_display(d); - exit(1); - } - - /* Skip the image data, if IDAT is not being handled then don't do this - * because it will cause a CRC error. - */ - if (chunk_info[0/*IDAT*/].keep == PNG_HANDLE_CHUNK_AS_DEFAULT) - { - png_start_read_image(d->png_ptr); - height = png_get_image_height(d->png_ptr, d->info_ptr); - - if (npasses > 1) - { - png_uint_32 width = png_get_image_width(d->png_ptr, d->info_ptr); - - for (ipass=0; ipass<npasses; ++ipass) - { - png_uint_32 wPass = PNG_PASS_COLS(width, ipass); - - if (wPass > 0) - { - png_uint_32 y; - - for (y=0; y<height; ++y) if (PNG_ROW_IN_INTERLACE_PASS(y, ipass)) - png_read_row(d->png_ptr, NULL, NULL); - } - } - } /* interlaced */ - - else /* not interlaced */ - { - png_uint_32 y; - - for (y=0; y<height; ++y) - png_read_row(d->png_ptr, NULL, NULL); - } - } - - png_read_end(d->png_ptr, d->end_ptr); - - flags[0] = get_valid(d, d->info_ptr); - flags[1] = get_unknown(d, d->info_ptr, 0/*before IDAT*/); - - /* Only png_read_png sets PNG_INFO_IDAT! */ - flags[chunk_info[0/*IDAT*/].keep != PNG_HANDLE_CHUNK_AS_DEFAULT] |= - PNG_INFO_IDAT; - - flags[2] = get_valid(d, d->end_ptr); - flags[3] = get_unknown(d, d->end_ptr, 1/*after IDAT*/); - - clean_display(d); - - return d->keep; -} - -static void -check_error(display *d, png_uint_32 flags, const char *message) -{ - while (flags) - { - png_uint_32 flag = flags & -(png_int_32)flags; - int i = find_by_flag(flag); - - fprintf(stderr, "%s(%s): chunk %s: %s\n", d->file, d->test, - chunk_info[i].name, message); - ++(d->error_count); - - flags &= ~flag; - } -} - -static void -check_handling(display *d, int def, png_uint_32 chunks, png_uint_32 known, - png_uint_32 unknown, const char *position, int set_callback) -{ - while (chunks) - { - png_uint_32 flag = chunks & -(png_int_32)chunks; - int i = find_by_flag(flag); - int keep = chunk_info[i].keep; - const char *type; - const char *errorx = NULL; - - if (chunk_info[i].unknown) - { - if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT) - { - type = "UNKNOWN (default)"; - keep = def; - } - - else - type = "UNKNOWN (specified)"; - - if (flag & known) - errorx = "chunk processed"; - - else switch (keep) - { - case PNG_HANDLE_CHUNK_AS_DEFAULT: - if (flag & unknown) - errorx = "DEFAULT: unknown chunk saved"; - break; - - case PNG_HANDLE_CHUNK_NEVER: - if (flag & unknown) - errorx = "DISCARD: unknown chunk saved"; - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - if (ancillary(chunk_info[i].name)) - { - if (!(flag & unknown)) - errorx = "IF-SAFE: unknown ancillary chunk lost"; - } - - else if (flag & unknown) - errorx = "IF-SAFE: unknown critical chunk saved"; - break; - - case PNG_HANDLE_CHUNK_ALWAYS: - if (!(flag & unknown)) - errorx = "SAVE: unknown chunk lost"; - break; - - default: - errorx = "internal error: bad keep"; - break; - } - } /* unknown chunk */ - - else /* known chunk */ - { - type = "KNOWN"; - - if (flag & known) - { - /* chunk was processed, it won't have been saved because that is - * caught below when checking for inconsistent processing. - */ - if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) - errorx = "!DEFAULT: known chunk processed"; - } - - else /* not processed */ switch (keep) - { - case PNG_HANDLE_CHUNK_AS_DEFAULT: - errorx = "DEFAULT: known chunk not processed"; - break; - - case PNG_HANDLE_CHUNK_NEVER: - if (flag & unknown) - errorx = "DISCARD: known chunk saved"; - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - if (ancillary(chunk_info[i].name)) - { - if (!(flag & unknown)) - errorx = "IF-SAFE: known ancillary chunk lost"; - } - - else if (flag & unknown) - errorx = "IF-SAFE: known critical chunk saved"; - break; - - case PNG_HANDLE_CHUNK_ALWAYS: - if (!(flag & unknown)) - errorx = "SAVE: known chunk lost"; - break; - - default: - errorx = "internal error: bad keep (2)"; - break; - } - } - - if (errorx != NULL) - { - ++(d->error_count); - fprintf(stderr, "%s(%s%s): %s %s %s: %s\n", d->file, d->test, - set_callback ? ",callback" : "", - type, chunk_info[i].name, position, errorx); - } - - chunks &= ~flag; - } -} - -static void -perform_one_test(FILE *fp, int argc, const char **argv, - png_uint_32 *default_flags, display *d, int set_callback) -{ - int def; - png_uint_32 flags[2][4]; - - rewind(fp); - clear_keep(); - memcpy(flags[0], default_flags, sizeof flags[0]); - - def = check(fp, argc, argv, flags[1], d, set_callback); - - /* Chunks should either be known or unknown, never both and this should apply - * whether the chunk is before or after the IDAT (actually, the app can - * probably change this by swapping the handling after the image, but this - * test does not do that.) - */ - check_error(d, (flags[0][0]|flags[0][2]) & (flags[0][1]|flags[0][3]), - "chunk handled inconsistently in count tests"); - check_error(d, (flags[1][0]|flags[1][2]) & (flags[1][1]|flags[1][3]), - "chunk handled inconsistently in option tests"); - - /* Now find out what happened to each chunk before and after the IDAT and - * determine if the behavior was correct. First some basic sanity checks, - * any known chunk should be known in the original count, any unknown chunk - * should be either known or unknown in the original. - */ - { - png_uint_32 test; - - test = flags[1][0] & ~flags[0][0]; - check_error(d, test, "new known chunk before IDAT"); - test = flags[1][1] & ~(flags[0][0] | flags[0][1]); - check_error(d, test, "new unknown chunk before IDAT"); - test = flags[1][2] & ~flags[0][2]; - check_error(d, test, "new known chunk after IDAT"); - test = flags[1][3] & ~(flags[0][2] | flags[0][3]); - check_error(d, test, "new unknown chunk after IDAT"); - } - - /* Now each chunk in the original list should have been handled according to - * the options set for that chunk, regardless of whether libpng knows about - * it or not. - */ - check_handling(d, def, flags[0][0] | flags[0][1], flags[1][0], flags[1][1], - "before IDAT", set_callback); - check_handling(d, def, flags[0][2] | flags[0][3], flags[1][2], flags[1][3], - "after IDAT", set_callback); -} - -static void -perform_one_test_safe(FILE *fp, int argc, const char **argv, - png_uint_32 *default_flags, display *d, const char *test) -{ - if (setjmp(d->error_return) == 0) - { - d->test = test; /* allow use of d->error_return */ -# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, d, 0); -# endif -# ifdef PNG_READ_USER_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, d, 1); -# endif - d->test = init; /* prevent use of d->error_return */ - } -} - -static const char *standard_tests[] = -{ - "discard", "default=discard", 0, - "save", "default=save", 0, - "if-safe", "default=if-safe", 0, - "vpAg", "vpAg=if-safe", 0, - "sTER", "sTER=if-safe", 0, - "IDAT", "default=discard", "IDAT=save", 0, - "sAPI", "bKGD=save", "cHRM=save", "gAMA=save", "all=discard", "iCCP=save", - "sBIT=save", "sRGB=save", 0, - 0/*end*/ -}; - -static PNG_NORETURN void -usage(const char *program, const char *reason) -{ - fprintf(stderr, "pngunknown: %s: usage:\n %s [--strict] " - "--default|{(CHNK|default|all)=(default|discard|if-safe|save)} " - "testfile.png\n", reason, program); - exit(99); -} - -int -main(int argc, const char **argv) -{ - FILE *fp; - png_uint_32 default_flags[4/*valid,unknown{before,after}*/]; - int strict = 0, default_tests = 0; - const char *count_argv = "default=save"; - const char *touch_file = NULL; - display d; - - init_display(&d, argv[0]); - - while (++argv, --argc > 0) - { - if (strcmp(*argv, "--strict") == 0) - strict = 1; - - else if (strcmp(*argv, "--default") == 0) - default_tests = 1; - - else if (strcmp(*argv, "--touch") == 0) - { - if (argc > 1) - touch_file = *++argv, --argc; - - else - usage(d.program, "--touch: missing file name"); - } - - else - break; - } - - /* A file name is required, but there should be no other arguments if - * --default was specified. - */ - if (argc <= 0) - usage(d.program, "missing test file"); - - /* GCC BUG: if (default_tests && argc != 1) triggers some weird GCC argc - * optimization which causes warnings with -Wstrict-overflow! - */ - else if (default_tests) if (argc != 1) - usage(d.program, "extra arguments"); - - /* The name of the test file is the last argument; remove it. */ - d.file = argv[--argc]; - - fp = fopen(d.file, "rb"); - if (fp == NULL) - { - perror(d.file); - exit(99); - } - - /* First find all the chunks, known and unknown, in the test file, a failure - * here aborts the whole test. - * - * If 'save' is supported then the normal saving method should happen, - * otherwise if 'read' is supported then the read callback will do the - * same thing. If both are supported the 'read' callback won't be - * instantiated by default. If 'save' is *not* supported then a user - * callback is required even though we can call png_get_unknown_chunks. - */ - if (check(fp, 1, &count_argv, default_flags, &d, -# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED - 0 -# else - 1 -# endif - ) != PNG_HANDLE_CHUNK_ALWAYS) - { - fprintf(stderr, "%s: %s: internal error\n", d.program, d.file); - exit(99); - } - - /* Now find what the various supplied options cause to change: */ - if (!default_tests) - { - d.test = cmd; /* acts as a flag to say exit, do not longjmp */ -# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, &d, 0); -# endif -# ifdef PNG_READ_USER_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, &d, 1); -# endif - d.test = init; - } - - else - { - const char **test = standard_tests; - - /* Set the exit_test pointer here so we can continue after a libpng error. - * NOTE: this leaks memory because the png_struct data from the failing - * test is never freed. - */ - while (*test) - { - const char *this_test = *test++; - const char **next = test; - int count = display_rc(&d, strict), new_count; - const char *result; - int arg_count = 0; - - while (*next) ++next, ++arg_count; - - perform_one_test_safe(fp, arg_count, test, default_flags, &d, - this_test); - - new_count = display_rc(&d, strict); - - if (new_count == count) - result = "PASS"; - - else - result = "FAIL"; - - printf("%s: %s %s\n", result, d.program, this_test); - - test = next+1; - } - } - - fclose(fp); - - if (display_rc(&d, strict) == 0) - { - /* Success, touch the success file if appropriate */ - if (touch_file != NULL) - { - FILE *fsuccess = fopen(touch_file, "wt"); - - if (fsuccess != NULL) - { - int err = 0; - fprintf(fsuccess, "PNG unknown tests succeeded\n"); - fflush(fsuccess); - err = ferror(fsuccess); - - if (fclose(fsuccess) || err) - { - fprintf(stderr, "%s: write failed\n", touch_file); - exit(99); - } - } - - else - { - fprintf(stderr, "%s: open failed\n", touch_file); - exit(99); - } - } - - return 0; - } - - return 1; -} - -#else /* !(READ_USER_CHUNKS || SAVE_UNKNOWN_CHUNKS) */ -int -main(void) -{ - fprintf(stderr, - " test ignored: no support to find out about unknown chunks\n"); - /* So the test is skipped: */ - return 77; -} -#endif /* READ_USER_CHUNKS || SAVE_UNKNOWN_CHUNKS */ - -#else /* !(SET_UNKNOWN_CHUNKS && READ) */ -int -main(void) -{ - fprintf(stderr, - " test ignored: no support to modify unknown chunk handling\n"); - /* So the test is skipped: */ - return 77; -} -#endif /* SET_UNKNOWN_CHUNKS && READ*/ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngvalid.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngvalid.c deleted file mode 100644 index a93fe65a600..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/pngvalid.c +++ /dev/null @@ -1,10595 +0,0 @@ - -/* pngvalid.c - validate libpng by constructing then reading png files. - * - * Last changed in libpng 1.6.14 [October 23, 2014] - * Copyright (c) 2014 Glenn Randers-Pehrson - * Written by John Cunningham Bowler - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * NOTES: - * This is a C program that is intended to be linked against libpng. It - * generates bitmaps internally, stores them as PNG files (using the - * sequential write code) then reads them back (using the sequential - * read code) and validates that the result has the correct data. - * - * The program can be modified and extended to test the correctness of - * transformations performed by libpng. - */ - -#define _POSIX_SOURCE 1 -#define _ISOC99_SOURCE 1 /* For floating point */ -#define _GNU_SOURCE 1 /* For the floating point exception extension */ - -#include <signal.h> -#include <stdio.h> - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include <config.h> -#endif - -#ifdef HAVE_FEENABLEEXCEPT /* from config.h, if included */ -# include <fenv.h> -#endif - -#ifndef FE_DIVBYZERO -# define FE_DIVBYZERO 0 -#endif -#ifndef FE_INVALID -# define FE_INVALID 0 -#endif -#ifndef FE_OVERFLOW -# define FE_OVERFLOW 0 -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -#ifdef PNG_ZLIB_HEADER -# include PNG_ZLIB_HEADER -#else -# include <zlib.h> /* For crc32 */ -#endif - -/* 1.6.1 added support for the configure test harness, which uses 77 to indicate - * a skipped test, in earlier versions we need to succeed on a skipped test, so: - */ -#if PNG_LIBPNG_VER < 10601 -# define SKIP 0 -#else -# define SKIP 77 -#endif - -/* pngvalid requires write support and one of the fixed or floating point APIs. - */ -#if defined(PNG_WRITE_SUPPORTED) &&\ - (defined(PNG_FIXED_POINT_SUPPORTED) || defined(PNG_FLOATING_POINT_SUPPORTED)) - -#if PNG_LIBPNG_VER < 10500 -/* This deliberately lacks the PNG_CONST. */ -typedef png_byte *png_const_bytep; - -/* This is copied from 1.5.1 png.h: */ -#define PNG_INTERLACE_ADAM7_PASSES 7 -#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) -#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) -#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) -#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) -#define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\ - -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass)) -#define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\ - -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass)) -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) -#define PNG_COL_FROM_PASS_COL(xIn, pass) \ - (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) -#define PNG_PASS_MASK(pass,off) ( \ - ((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \ - ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) -#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ - ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) -#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ - ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) - -/* These are needed too for the default build: */ -#define PNG_WRITE_16BIT_SUPPORTED -#define PNG_READ_16BIT_SUPPORTED - -/* This comes from pnglibconf.h afer 1.5: */ -#define PNG_FP_1 100000 -#define PNG_GAMMA_THRESHOLD_FIXED\ - ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) -#endif - -#if PNG_LIBPNG_VER < 10600 - /* 1.6.0 constifies many APIs, the following exists to allow pngvalid to be - * compiled against earlier versions. - */ -# define png_const_structp png_structp -#endif - -#include <float.h> /* For floating point constants */ -#include <stdlib.h> /* For malloc */ -#include <string.h> /* For memcpy, memset */ -#include <math.h> /* For floor */ - -/* Unused formal parameter errors are removed using the following macro which is - * expected to have no bad effects on performance. - */ -#ifndef UNUSED -# if defined(__GNUC__) || defined(_MSC_VER) -# define UNUSED(param) (void)param; -# else -# define UNUSED(param) -# endif -#endif - -/***************************** EXCEPTION HANDLING *****************************/ -#ifdef PNG_FREESTANDING_TESTS -# include <cexcept.h> -#else -# include "../visupng/cexcept.h" -#endif - -#ifdef __cplusplus -# define this not_the_cpp_this -# define new not_the_cpp_new -# define voidcast(type, value) static_cast<type>(value) -#else -# define voidcast(type, value) (value) -#endif /* __cplusplus */ - -struct png_store; -define_exception_type(struct png_store*); - -/* The following are macros to reduce typing everywhere where the well known - * name 'the_exception_context' must be defined. - */ -#define anon_context(ps) struct exception_context *the_exception_context = \ - &(ps)->exception_context -#define context(ps,fault) anon_context(ps); png_store *fault - -/* This macro returns the number of elements in an array as an (unsigned int), - * it is necessary to avoid the inability of certain versions of GCC to use - * the value of a compile-time constant when performing range checks. It must - * be passed an array name. - */ -#define ARRAY_SIZE(a) ((unsigned int)((sizeof (a))/(sizeof (a)[0]))) - -/******************************* UTILITIES ************************************/ -/* Error handling is particularly problematic in production code - error - * handlers often themselves have bugs which lead to programs that detect - * minor errors crashing. The following functions deal with one very - * common class of errors in error handlers - attempting to format error or - * warning messages into buffers that are too small. - */ -static size_t safecat(char *buffer, size_t bufsize, size_t pos, - PNG_CONST char *cat) -{ - while (pos < bufsize && cat != NULL && *cat != 0) - buffer[pos++] = *cat++; - - if (pos >= bufsize) - pos = bufsize-1; - - buffer[pos] = 0; - return pos; -} - -static size_t safecatn(char *buffer, size_t bufsize, size_t pos, int n) -{ - char number[64]; - sprintf(number, "%d", n); - return safecat(buffer, bufsize, pos, number); -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -static size_t safecatd(char *buffer, size_t bufsize, size_t pos, double d, - int precision) -{ - char number[64]; - sprintf(number, "%.*f", precision, d); - return safecat(buffer, bufsize, pos, number); -} -#endif - -static PNG_CONST char invalid[] = "invalid"; -static PNG_CONST char sep[] = ": "; - -static PNG_CONST char *colour_types[8] = -{ - "grayscale", invalid, "truecolour", "indexed-colour", - "grayscale with alpha", invalid, "truecolour with alpha", invalid -}; - -#ifdef PNG_READ_SUPPORTED -/* Convert a double precision value to fixed point. */ -static png_fixed_point -fix(double d) -{ - d = floor(d * PNG_FP_1 + .5); - return (png_fixed_point)d; -} -#endif /* PNG_READ_SUPPORTED */ - -/* Generate random bytes. This uses a boring repeatable algorithm and it - * is implemented here so that it gives the same set of numbers on every - * architecture. It's a linear congruential generator (Knuth or Sedgewick - * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and - * Hill, "The Art of Electronics" (Pseudo-Random Bit Sequences and Noise - * Generation.) - */ -static void -make_random_bytes(png_uint_32* seed, void* pv, size_t size) -{ - png_uint_32 u0 = seed[0], u1 = seed[1]; - png_bytep bytes = voidcast(png_bytep, pv); - - /* There are thirty three bits, the next bit in the sequence is bit-33 XOR - * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. - */ - size_t i; - for (i=0; i<size; ++i) - { - /* First generate 8 new bits then shift them in at the end. */ - png_uint_32 u = ((u0 >> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; - u1 <<= 8; - u1 |= u0 >> 24; - u0 <<= 8; - u0 |= u; - *bytes++ = (png_byte)u; - } - - seed[0] = u0; - seed[1] = u1; -} - -static void -make_four_random_bytes(png_uint_32* seed, png_bytep bytes) -{ - make_random_bytes(seed, bytes, 4); -} - -#ifdef PNG_READ_SUPPORTED -static void -randomize(void *pv, size_t size) -{ - static png_uint_32 random_seed[2] = {0x56789abc, 0xd}; - make_random_bytes(random_seed, pv, size); -} - -#define RANDOMIZE(this) randomize(&(this), sizeof (this)) - -static unsigned int -random_mod(unsigned int max) -{ - unsigned int x; - - RANDOMIZE(x); - - return x % max; /* 0 .. max-1 */ -} - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -static int -random_choice(void) -{ - unsigned char x; - - RANDOMIZE(x); - - return x & 1; -} -#endif -#endif /* PNG_READ_SUPPORTED */ - -/* A numeric ID based on PNG file characteristics. The 'do_interlace' field - * simply records whether pngvalid did the interlace itself or whether it - * was done by libpng. Width and height must be less than 256. 'palette' is an - * index of the palette to use for formats with a palette (0 otherwise.) - */ -#define FILEID(col, depth, palette, interlace, width, height, do_interlace) \ - ((png_uint_32)((col) + ((depth)<<3) + ((palette)<<8) + ((interlace)<<13) + \ - (((do_interlace)!=0)<<15) + ((width)<<16) + ((height)<<24))) - -#define COL_FROM_ID(id) ((png_byte)((id)& 0x7U)) -#define DEPTH_FROM_ID(id) ((png_byte)(((id) >> 3) & 0x1fU)) -#define PALETTE_FROM_ID(id) (((id) >> 8) & 0x1f) -#define INTERLACE_FROM_ID(id) ((int)(((id) >> 13) & 0x3)) -#define DO_INTERLACE_FROM_ID(id) ((int)(((id)>>15) & 1)) -#define WIDTH_FROM_ID(id) (((id)>>16) & 0xff) -#define HEIGHT_FROM_ID(id) (((id)>>24) & 0xff) - -/* Utility to construct a standard name for a standard image. */ -static size_t -standard_name(char *buffer, size_t bufsize, size_t pos, png_byte colour_type, - int bit_depth, unsigned int npalette, int interlace_type, - png_uint_32 w, png_uint_32 h, int do_interlace) -{ - pos = safecat(buffer, bufsize, pos, colour_types[colour_type]); - if (npalette > 0) - { - pos = safecat(buffer, bufsize, pos, "["); - pos = safecatn(buffer, bufsize, pos, npalette); - pos = safecat(buffer, bufsize, pos, "]"); - } - pos = safecat(buffer, bufsize, pos, " "); - pos = safecatn(buffer, bufsize, pos, bit_depth); - pos = safecat(buffer, bufsize, pos, " bit"); - - if (interlace_type != PNG_INTERLACE_NONE) - { - pos = safecat(buffer, bufsize, pos, " interlaced"); - if (do_interlace) - pos = safecat(buffer, bufsize, pos, "(pngvalid)"); - else - pos = safecat(buffer, bufsize, pos, "(libpng)"); - } - - if (w > 0 || h > 0) - { - pos = safecat(buffer, bufsize, pos, " "); - pos = safecatn(buffer, bufsize, pos, w); - pos = safecat(buffer, bufsize, pos, "x"); - pos = safecatn(buffer, bufsize, pos, h); - } - - return pos; -} - -static size_t -standard_name_from_id(char *buffer, size_t bufsize, size_t pos, png_uint_32 id) -{ - return standard_name(buffer, bufsize, pos, COL_FROM_ID(id), - DEPTH_FROM_ID(id), PALETTE_FROM_ID(id), INTERLACE_FROM_ID(id), - WIDTH_FROM_ID(id), HEIGHT_FROM_ID(id), DO_INTERLACE_FROM_ID(id)); -} - -/* Convenience API and defines to list valid formats. Note that 16 bit read and - * write support is required to do 16 bit read tests (we must be able to make a - * 16 bit image to test!) - */ -#ifdef PNG_WRITE_16BIT_SUPPORTED -# define WRITE_BDHI 4 -# ifdef PNG_READ_16BIT_SUPPORTED -# define READ_BDHI 4 -# define DO_16BIT -# endif -#else -# define WRITE_BDHI 3 -#endif -#ifndef DO_16BIT -# define READ_BDHI 3 -#endif - -/* The following defines the number of different palettes to generate for - * each log bit depth of a colour type 3 standard image. - */ -#define PALETTE_COUNT(bit_depth) ((bit_depth) > 4 ? 1U : 16U) - -static int -next_format(png_bytep colour_type, png_bytep bit_depth, - unsigned int* palette_number, int no_low_depth_gray) -{ - if (*bit_depth == 0) - { - *colour_type = 0; - if (no_low_depth_gray) - *bit_depth = 8; - else - *bit_depth = 1; - *palette_number = 0; - return 1; - } - - if (*colour_type == 3) - { - /* Add multiple palettes for colour type 3. */ - if (++*palette_number < PALETTE_COUNT(*bit_depth)) - return 1; - - *palette_number = 0; - } - - *bit_depth = (png_byte)(*bit_depth << 1); - - /* Palette images are restricted to 8 bit depth */ - if (*bit_depth <= 8 -#ifdef DO_16BIT - || (*colour_type != 3 && *bit_depth <= 16) -#endif - ) - return 1; - - /* Move to the next color type, or return 0 at the end. */ - switch (*colour_type) - { - case 0: - *colour_type = 2; - *bit_depth = 8; - return 1; - - case 2: - *colour_type = 3; - *bit_depth = 1; - return 1; - - case 3: - *colour_type = 4; - *bit_depth = 8; - return 1; - - case 4: - *colour_type = 6; - *bit_depth = 8; - return 1; - - default: - return 0; - } -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -static unsigned int -sample(png_const_bytep row, png_byte colour_type, png_byte bit_depth, - png_uint_32 x, unsigned int sample_index) -{ - png_uint_32 bit_index, result; - - /* Find a sample index for the desired sample: */ - x *= bit_depth; - bit_index = x; - - if ((colour_type & 1) == 0) /* !palette */ - { - if (colour_type & 2) - bit_index *= 3; - - if (colour_type & 4) - bit_index += x; /* Alpha channel */ - - /* Multiple channels; select one: */ - if (colour_type & (2+4)) - bit_index += sample_index * bit_depth; - } - - /* Return the sample from the row as an integer. */ - row += bit_index >> 3; - result = *row; - - if (bit_depth == 8) - return result; - - else if (bit_depth > 8) - return (result << 8) + *++row; - - /* Less than 8 bits per sample. */ - bit_index &= 7; - return (result >> (8-bit_index-bit_depth)) & ((1U<<bit_depth)-1); -} -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -/* Copy a single pixel, of a given size, from one buffer to another - - * while this is basically bit addressed there is an implicit assumption - * that pixels 8 or more bits in size are byte aligned and that pixels - * do not otherwise cross byte boundaries. (This is, so far as I know, - * universally true in bitmap computer graphics. [JCB 20101212]) - * - * NOTE: The to and from buffers may be the same. - */ -static void -pixel_copy(png_bytep toBuffer, png_uint_32 toIndex, - png_const_bytep fromBuffer, png_uint_32 fromIndex, unsigned int pixelSize) -{ - /* Assume we can multiply by 'size' without overflow because we are - * just working in a single buffer. - */ - toIndex *= pixelSize; - fromIndex *= pixelSize; - if (pixelSize < 8) /* Sub-byte */ - { - /* Mask to select the location of the copied pixel: */ - unsigned int destMask = ((1U<<pixelSize)-1) << (8-pixelSize-(toIndex&7)); - /* The following read the entire pixels and clears the extra: */ - unsigned int destByte = toBuffer[toIndex >> 3] & ~destMask; - unsigned int sourceByte = fromBuffer[fromIndex >> 3]; - - /* Don't rely on << or >> supporting '0' here, just in case: */ - fromIndex &= 7; - if (fromIndex > 0) sourceByte <<= fromIndex; - if ((toIndex & 7) > 0) sourceByte >>= toIndex & 7; - - toBuffer[toIndex >> 3] = (png_byte)(destByte | (sourceByte & destMask)); - } - else /* One or more bytes */ - memmove(toBuffer+(toIndex>>3), fromBuffer+(fromIndex>>3), pixelSize>>3); -} - -#ifdef PNG_READ_SUPPORTED -/* Copy a complete row of pixels, taking into account potential partial - * bytes at the end. - */ -static void -row_copy(png_bytep toBuffer, png_const_bytep fromBuffer, unsigned int bitWidth) -{ - memcpy(toBuffer, fromBuffer, bitWidth >> 3); - - if ((bitWidth & 7) != 0) - { - unsigned int mask; - - toBuffer += bitWidth >> 3; - fromBuffer += bitWidth >> 3; - /* The remaining bits are in the top of the byte, the mask is the bits to - * retain. - */ - mask = 0xff >> (bitWidth & 7); - *toBuffer = (png_byte)((*toBuffer & mask) | (*fromBuffer & ~mask)); - } -} - -/* Compare pixels - they are assumed to start at the first byte in the - * given buffers. - */ -static int -pixel_cmp(png_const_bytep pa, png_const_bytep pb, png_uint_32 bit_width) -{ -#if PNG_LIBPNG_VER < 10506 - if (memcmp(pa, pb, bit_width>>3) == 0) - { - png_uint_32 p; - - if ((bit_width & 7) == 0) return 0; - - /* Ok, any differences? */ - p = pa[bit_width >> 3]; - p ^= pb[bit_width >> 3]; - - if (p == 0) return 0; - - /* There are, but they may not be significant, remove the bits - * after the end (the low order bits in PNG.) - */ - bit_width &= 7; - p >>= 8-bit_width; - - if (p == 0) return 0; - } -#else - /* From libpng-1.5.6 the overwrite should be fixed, so compare the trailing - * bits too: - */ - if (memcmp(pa, pb, (bit_width+7)>>3) == 0) - return 0; -#endif - - /* Return the index of the changed byte. */ - { - png_uint_32 where = 0; - - while (pa[where] == pb[where]) ++where; - return 1+where; - } -} -#endif /* PNG_READ_SUPPORTED */ - -/*************************** BASIC PNG FILE WRITING ***************************/ -/* A png_store takes data from the sequential writer or provides data - * to the sequential reader. It can also store the result of a PNG - * write for later retrieval. - */ -#define STORE_BUFFER_SIZE 500 /* arbitrary */ -typedef struct png_store_buffer -{ - struct png_store_buffer* prev; /* NOTE: stored in reverse order */ - png_byte buffer[STORE_BUFFER_SIZE]; -} png_store_buffer; - -#define FILE_NAME_SIZE 64 - -typedef struct store_palette_entry /* record of a single palette entry */ -{ - png_byte red; - png_byte green; - png_byte blue; - png_byte alpha; -} store_palette_entry, store_palette[256]; - -typedef struct png_store_file -{ - struct png_store_file* next; /* as many as you like... */ - char name[FILE_NAME_SIZE]; - png_uint_32 id; /* must be correct (see FILEID) */ - png_size_t datacount; /* In this (the last) buffer */ - png_store_buffer data; /* Last buffer in file */ - int npalette; /* Number of entries in palette */ - store_palette_entry* palette; /* May be NULL */ -} png_store_file; - -/* The following is a pool of memory allocated by a single libpng read or write - * operation. - */ -typedef struct store_pool -{ - struct png_store *store; /* Back pointer */ - struct store_memory *list; /* List of allocated memory */ - png_byte mark[4]; /* Before and after data */ - - /* Statistics for this run. */ - png_alloc_size_t max; /* Maximum single allocation */ - png_alloc_size_t current; /* Current allocation */ - png_alloc_size_t limit; /* Highest current allocation */ - png_alloc_size_t total; /* Total allocation */ - - /* Overall statistics (retained across successive runs). */ - png_alloc_size_t max_max; - png_alloc_size_t max_limit; - png_alloc_size_t max_total; -} store_pool; - -typedef struct png_store -{ - /* For cexcept.h exception handling - simply store one of these; - * the context is a self pointer but it may point to a different - * png_store (in fact it never does in this program.) - */ - struct exception_context - exception_context; - - unsigned int verbose :1; - unsigned int treat_warnings_as_errors :1; - unsigned int expect_error :1; - unsigned int expect_warning :1; - unsigned int saw_warning :1; - unsigned int speed :1; - unsigned int progressive :1; /* use progressive read */ - unsigned int validated :1; /* used as a temporary flag */ - int nerrors; - int nwarnings; - int noptions; /* number of options below: */ - struct { - unsigned char option; /* option number, 0..30 */ - unsigned char setting; /* setting (unset,invalid,on,off) */ - } options[16]; - char test[128]; /* Name of test */ - char error[256]; - - /* Read fields */ - png_structp pread; /* Used to read a saved file */ - png_infop piread; - png_store_file* current; /* Set when reading */ - png_store_buffer* next; /* Set when reading */ - png_size_t readpos; /* Position in *next */ - png_byte* image; /* Buffer for reading interlaced images */ - png_size_t cb_image; /* Size of this buffer */ - png_size_t cb_row; /* Row size of the image(s) */ - png_uint_32 image_h; /* Number of rows in a single image */ - store_pool read_memory_pool; - - /* Write fields */ - png_store_file* saved; - png_structp pwrite; /* Used when writing a new file */ - png_infop piwrite; - png_size_t writepos; /* Position in .new */ - char wname[FILE_NAME_SIZE]; - png_store_buffer new; /* The end of the new PNG file being written. */ - store_pool write_memory_pool; - store_palette_entry* palette; - int npalette; -} png_store; - -/* Initialization and cleanup */ -static void -store_pool_mark(png_bytep mark) -{ - static png_uint_32 store_seed[2] = { 0x12345678, 1}; - - make_four_random_bytes(store_seed, mark); -} - -#ifdef PNG_READ_SUPPORTED -/* Use this for random 32 bit values; this function makes sure the result is - * non-zero. - */ -static png_uint_32 -random_32(void) -{ - - for (;;) - { - png_byte mark[4]; - png_uint_32 result; - - store_pool_mark(mark); - result = png_get_uint_32(mark); - - if (result != 0) - return result; - } -} -#endif /* PNG_READ_SUPPORTED */ - -static void -store_pool_init(png_store *ps, store_pool *pool) -{ - memset(pool, 0, sizeof *pool); - - pool->store = ps; - pool->list = NULL; - pool->max = pool->current = pool->limit = pool->total = 0; - pool->max_max = pool->max_limit = pool->max_total = 0; - store_pool_mark(pool->mark); -} - -static void -store_init(png_store* ps) -{ - memset(ps, 0, sizeof *ps); - init_exception_context(&ps->exception_context); - store_pool_init(ps, &ps->read_memory_pool); - store_pool_init(ps, &ps->write_memory_pool); - ps->verbose = 0; - ps->treat_warnings_as_errors = 0; - ps->expect_error = 0; - ps->expect_warning = 0; - ps->saw_warning = 0; - ps->speed = 0; - ps->progressive = 0; - ps->validated = 0; - ps->nerrors = ps->nwarnings = 0; - ps->pread = NULL; - ps->piread = NULL; - ps->saved = ps->current = NULL; - ps->next = NULL; - ps->readpos = 0; - ps->image = NULL; - ps->cb_image = 0; - ps->cb_row = 0; - ps->image_h = 0; - ps->pwrite = NULL; - ps->piwrite = NULL; - ps->writepos = 0; - ps->new.prev = NULL; - ps->palette = NULL; - ps->npalette = 0; - ps->noptions = 0; -} - -static void -store_freebuffer(png_store_buffer* psb) -{ - if (psb->prev) - { - store_freebuffer(psb->prev); - free(psb->prev); - psb->prev = NULL; - } -} - -static void -store_freenew(png_store *ps) -{ - store_freebuffer(&ps->new); - ps->writepos = 0; - if (ps->palette != NULL) - { - free(ps->palette); - ps->palette = NULL; - ps->npalette = 0; - } -} - -static void -store_storenew(png_store *ps) -{ - png_store_buffer *pb; - - if (ps->writepos != STORE_BUFFER_SIZE) - png_error(ps->pwrite, "invalid store call"); - - pb = voidcast(png_store_buffer*, malloc(sizeof *pb)); - - if (pb == NULL) - png_error(ps->pwrite, "store new: OOM"); - - *pb = ps->new; - ps->new.prev = pb; - ps->writepos = 0; -} - -static void -store_freefile(png_store_file **ppf) -{ - if (*ppf != NULL) - { - store_freefile(&(*ppf)->next); - - store_freebuffer(&(*ppf)->data); - (*ppf)->datacount = 0; - if ((*ppf)->palette != NULL) - { - free((*ppf)->palette); - (*ppf)->palette = NULL; - (*ppf)->npalette = 0; - } - free(*ppf); - *ppf = NULL; - } -} - -/* Main interface to file storeage, after writing a new PNG file (see the API - * below) call store_storefile to store the result with the given name and id. - */ -static void -store_storefile(png_store *ps, png_uint_32 id) -{ - png_store_file *pf = voidcast(png_store_file*, malloc(sizeof *pf)); - if (pf == NULL) - png_error(ps->pwrite, "storefile: OOM"); - safecat(pf->name, sizeof pf->name, 0, ps->wname); - pf->id = id; - pf->data = ps->new; - pf->datacount = ps->writepos; - ps->new.prev = NULL; - ps->writepos = 0; - pf->palette = ps->palette; - pf->npalette = ps->npalette; - ps->palette = 0; - ps->npalette = 0; - - /* And save it. */ - pf->next = ps->saved; - ps->saved = pf; -} - -/* Generate an error message (in the given buffer) */ -static size_t -store_message(png_store *ps, png_const_structp pp, char *buffer, size_t bufsize, - size_t pos, PNG_CONST char *msg) -{ - if (pp != NULL && pp == ps->pread) - { - /* Reading a file */ - pos = safecat(buffer, bufsize, pos, "read: "); - - if (ps->current != NULL) - { - pos = safecat(buffer, bufsize, pos, ps->current->name); - pos = safecat(buffer, bufsize, pos, sep); - } - } - - else if (pp != NULL && pp == ps->pwrite) - { - /* Writing a file */ - pos = safecat(buffer, bufsize, pos, "write: "); - pos = safecat(buffer, bufsize, pos, ps->wname); - pos = safecat(buffer, bufsize, pos, sep); - } - - else - { - /* Neither reading nor writing (or a memory error in struct delete) */ - pos = safecat(buffer, bufsize, pos, "pngvalid: "); - } - - if (ps->test[0] != 0) - { - pos = safecat(buffer, bufsize, pos, ps->test); - pos = safecat(buffer, bufsize, pos, sep); - } - pos = safecat(buffer, bufsize, pos, msg); - return pos; -} - -/* Verbose output to the error stream: */ -static void -store_verbose(png_store *ps, png_const_structp pp, png_const_charp prefix, - png_const_charp message) -{ - char buffer[512]; - - if (prefix) - fputs(prefix, stderr); - - (void)store_message(ps, pp, buffer, sizeof buffer, 0, message); - fputs(buffer, stderr); - fputc('\n', stderr); -} - -/* Log an error or warning - the relevant count is always incremented. */ -static void -store_log(png_store* ps, png_const_structp pp, png_const_charp message, - int is_error) -{ - /* The warning is copied to the error buffer if there are no errors and it is - * the first warning. The error is copied to the error buffer if it is the - * first error (overwriting any prior warnings). - */ - if (is_error ? (ps->nerrors)++ == 0 : - (ps->nwarnings)++ == 0 && ps->nerrors == 0) - store_message(ps, pp, ps->error, sizeof ps->error, 0, message); - - if (ps->verbose) - store_verbose(ps, pp, is_error ? "error: " : "warning: ", message); -} - -#ifdef PNG_READ_SUPPORTED -/* Internal error function, called with a png_store but no libpng stuff. */ -static void -internal_error(png_store *ps, png_const_charp message) -{ - store_log(ps, NULL, message, 1 /* error */); - - /* And finally throw an exception. */ - { - struct exception_context *the_exception_context = &ps->exception_context; - Throw ps; - } -} -#endif /* PNG_READ_SUPPORTED */ - -/* Functions to use as PNG callbacks. */ -static void PNGCBAPI -store_error(png_structp ppIn, png_const_charp message) /* PNG_NORETURN */ -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); - - if (!ps->expect_error) - store_log(ps, pp, message, 1 /* error */); - - /* And finally throw an exception. */ - { - struct exception_context *the_exception_context = &ps->exception_context; - Throw ps; - } -} - -static void PNGCBAPI -store_warning(png_structp ppIn, png_const_charp message) -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); - - if (!ps->expect_warning) - store_log(ps, pp, message, 0 /* warning */); - else - ps->saw_warning = 1; -} - -/* These somewhat odd functions are used when reading an image to ensure that - * the buffer is big enough, the png_structp is for errors. - */ -/* Return a single row from the correct image. */ -static png_bytep -store_image_row(PNG_CONST png_store* ps, png_const_structp pp, int nImage, - png_uint_32 y) -{ - png_size_t coffset = (nImage * ps->image_h + y) * (ps->cb_row + 5) + 2; - - if (ps->image == NULL) - png_error(pp, "no allocated image"); - - if (coffset + ps->cb_row + 3 > ps->cb_image) - png_error(pp, "image too small"); - - return ps->image + coffset; -} - -static void -store_image_free(png_store *ps, png_const_structp pp) -{ - if (ps->image != NULL) - { - png_bytep image = ps->image; - - if (image[-1] != 0xed || image[ps->cb_image] != 0xfe) - { - if (pp != NULL) - png_error(pp, "png_store image overwrite (1)"); - else - store_log(ps, NULL, "png_store image overwrite (2)", 1); - } - - ps->image = NULL; - ps->cb_image = 0; - --image; - free(image); - } -} - -static void -store_ensure_image(png_store *ps, png_const_structp pp, int nImages, - png_size_t cbRow, png_uint_32 cRows) -{ - png_size_t cb = nImages * cRows * (cbRow + 5); - - if (ps->cb_image < cb) - { - png_bytep image; - - store_image_free(ps, pp); - - /* The buffer is deliberately mis-aligned. */ - image = voidcast(png_bytep, malloc(cb+2)); - if (image == NULL) - { - /* Called from the startup - ignore the error for the moment. */ - if (pp == NULL) - return; - - png_error(pp, "OOM allocating image buffer"); - } - - /* These magic tags are used to detect overwrites above. */ - ++image; - image[-1] = 0xed; - image[cb] = 0xfe; - - ps->image = image; - ps->cb_image = cb; - } - - /* We have an adequate sized image; lay out the rows. There are 2 bytes at - * the start and three at the end of each (this ensures that the row - * alignment starts out odd - 2+1 and changes for larger images on each row.) - */ - ps->cb_row = cbRow; - ps->image_h = cRows; - - /* For error checking, the whole buffer is set to 10110010 (0xb2 - 178). - * This deliberately doesn't match the bits in the size test image which are - * outside the image; these are set to 0xff (all 1). To make the row - * comparison work in the 'size' test case the size rows are pre-initialized - * to the same value prior to calling 'standard_row'. - */ - memset(ps->image, 178, cb); - - /* Then put in the marks. */ - while (--nImages >= 0) - { - png_uint_32 y; - - for (y=0; y<cRows; ++y) - { - png_bytep row = store_image_row(ps, pp, nImages, y); - - /* The markers: */ - row[-2] = 190; - row[-1] = 239; - row[cbRow] = 222; - row[cbRow+1] = 173; - row[cbRow+2] = 17; - } - } -} - -#ifdef PNG_READ_SUPPORTED -static void -store_image_check(PNG_CONST png_store* ps, png_const_structp pp, int iImage) -{ - png_const_bytep image = ps->image; - - if (image[-1] != 0xed || image[ps->cb_image] != 0xfe) - png_error(pp, "image overwrite"); - else - { - png_size_t cbRow = ps->cb_row; - png_uint_32 rows = ps->image_h; - - image += iImage * (cbRow+5) * ps->image_h; - - image += 2; /* skip image first row markers */ - - while (rows-- > 0) - { - if (image[-2] != 190 || image[-1] != 239) - png_error(pp, "row start overwritten"); - - if (image[cbRow] != 222 || image[cbRow+1] != 173 || - image[cbRow+2] != 17) - png_error(pp, "row end overwritten"); - - image += cbRow+5; - } - } -} -#endif /* PNG_READ_SUPPORTED */ - -static void PNGCBAPI -store_write(png_structp ppIn, png_bytep pb, png_size_t st) -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); - - if (ps->pwrite != pp) - png_error(pp, "store state damaged"); - - while (st > 0) - { - size_t cb; - - if (ps->writepos >= STORE_BUFFER_SIZE) - store_storenew(ps); - - cb = st; - - if (cb > STORE_BUFFER_SIZE - ps->writepos) - cb = STORE_BUFFER_SIZE - ps->writepos; - - memcpy(ps->new.buffer + ps->writepos, pb, cb); - pb += cb; - st -= cb; - ps->writepos += cb; - } -} - -static void PNGCBAPI -store_flush(png_structp ppIn) -{ - UNUSED(ppIn) /*DOES NOTHING*/ -} - -#ifdef PNG_READ_SUPPORTED -static size_t -store_read_buffer_size(png_store *ps) -{ - /* Return the bytes available for read in the current buffer. */ - if (ps->next != &ps->current->data) - return STORE_BUFFER_SIZE; - - return ps->current->datacount; -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -/* Return total bytes available for read. */ -static size_t -store_read_buffer_avail(png_store *ps) -{ - if (ps->current != NULL && ps->next != NULL) - { - png_store_buffer *next = &ps->current->data; - size_t cbAvail = ps->current->datacount; - - while (next != ps->next && next != NULL) - { - next = next->prev; - cbAvail += STORE_BUFFER_SIZE; - } - - if (next != ps->next) - png_error(ps->pread, "buffer read error"); - - if (cbAvail > ps->readpos) - return cbAvail - ps->readpos; - } - - return 0; -} -#endif - -static int -store_read_buffer_next(png_store *ps) -{ - png_store_buffer *pbOld = ps->next; - png_store_buffer *pbNew = &ps->current->data; - if (pbOld != pbNew) - { - while (pbNew != NULL && pbNew->prev != pbOld) - pbNew = pbNew->prev; - - if (pbNew != NULL) - { - ps->next = pbNew; - ps->readpos = 0; - return 1; - } - - png_error(ps->pread, "buffer lost"); - } - - return 0; /* EOF or error */ -} - -/* Need separate implementation and callback to allow use of the same code - * during progressive read, where the io_ptr is set internally by libpng. - */ -static void -store_read_imp(png_store *ps, png_bytep pb, png_size_t st) -{ - if (ps->current == NULL || ps->next == NULL) - png_error(ps->pread, "store state damaged"); - - while (st > 0) - { - size_t cbAvail = store_read_buffer_size(ps) - ps->readpos; - - if (cbAvail > 0) - { - if (cbAvail > st) cbAvail = st; - memcpy(pb, ps->next->buffer + ps->readpos, cbAvail); - st -= cbAvail; - pb += cbAvail; - ps->readpos += cbAvail; - } - - else if (!store_read_buffer_next(ps)) - png_error(ps->pread, "read beyond end of file"); - } -} - -static void PNGCBAPI -store_read(png_structp ppIn, png_bytep pb, png_size_t st) -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); - - if (ps == NULL || ps->pread != pp) - png_error(pp, "bad store read call"); - - store_read_imp(ps, pb, st); -} - -static void -store_progressive_read(png_store *ps, png_structp pp, png_infop pi) -{ - /* Notice that a call to store_read will cause this function to fail because - * readpos will be set. - */ - if (ps->pread != pp || ps->current == NULL || ps->next == NULL) - png_error(pp, "store state damaged (progressive)"); - - do - { - if (ps->readpos != 0) - png_error(pp, "store_read called during progressive read"); - - png_process_data(pp, pi, ps->next->buffer, store_read_buffer_size(ps)); - } - while (store_read_buffer_next(ps)); -} -#endif /* PNG_READ_SUPPORTED */ - -/* The caller must fill this in: */ -static store_palette_entry * -store_write_palette(png_store *ps, int npalette) -{ - if (ps->pwrite == NULL) - store_log(ps, NULL, "attempt to write palette without write stream", 1); - - if (ps->palette != NULL) - png_error(ps->pwrite, "multiple store_write_palette calls"); - - /* This function can only return NULL if called with '0'! */ - if (npalette > 0) - { - ps->palette = voidcast(store_palette_entry*, malloc(npalette * - sizeof *ps->palette)); - - if (ps->palette == NULL) - png_error(ps->pwrite, "store new palette: OOM"); - - ps->npalette = npalette; - } - - return ps->palette; -} - -#ifdef PNG_READ_SUPPORTED -static store_palette_entry * -store_current_palette(png_store *ps, int *npalette) -{ - /* This is an internal error (the call has been made outside a read - * operation.) - */ - if (ps->current == NULL) - store_log(ps, ps->pread, "no current stream for palette", 1); - - /* The result may be null if there is no palette. */ - *npalette = ps->current->npalette; - return ps->current->palette; -} -#endif /* PNG_READ_SUPPORTED */ - -/***************************** MEMORY MANAGEMENT*** ***************************/ -#ifdef PNG_USER_MEM_SUPPORTED -/* A store_memory is simply the header for an allocated block of memory. The - * pointer returned to libpng is just after the end of the header block, the - * allocated memory is followed by a second copy of the 'mark'. - */ -typedef struct store_memory -{ - store_pool *pool; /* Originating pool */ - struct store_memory *next; /* Singly linked list */ - png_alloc_size_t size; /* Size of memory allocated */ - png_byte mark[4]; /* ID marker */ -} store_memory; - -/* Handle a fatal error in memory allocation. This calls png_error if the - * libpng struct is non-NULL, else it outputs a message and returns. This means - * that a memory problem while libpng is running will abort (png_error) the - * handling of particular file while one in cleanup (after the destroy of the - * struct has returned) will simply keep going and free (or attempt to free) - * all the memory. - */ -static void -store_pool_error(png_store *ps, png_const_structp pp, PNG_CONST char *msg) -{ - if (pp != NULL) - png_error(pp, msg); - - /* Else we have to do it ourselves. png_error eventually calls store_log, - * above. store_log accepts a NULL png_structp - it just changes what gets - * output by store_message. - */ - store_log(ps, pp, msg, 1 /* error */); -} - -static void -store_memory_free(png_const_structp pp, store_pool *pool, store_memory *memory) -{ - /* Note that pp may be NULL (see store_pool_delete below), the caller has - * found 'memory' in pool->list *and* unlinked this entry, so this is a valid - * pointer (for sure), but the contents may have been trashed. - */ - if (memory->pool != pool) - store_pool_error(pool->store, pp, "memory corrupted (pool)"); - - else if (memcmp(memory->mark, pool->mark, sizeof memory->mark) != 0) - store_pool_error(pool->store, pp, "memory corrupted (start)"); - - /* It should be safe to read the size field now. */ - else - { - png_alloc_size_t cb = memory->size; - - if (cb > pool->max) - store_pool_error(pool->store, pp, "memory corrupted (size)"); - - else if (memcmp((png_bytep)(memory+1)+cb, pool->mark, sizeof pool->mark) - != 0) - store_pool_error(pool->store, pp, "memory corrupted (end)"); - - /* Finally give the library a chance to find problems too: */ - else - { - pool->current -= cb; - free(memory); - } - } -} - -static void -store_pool_delete(png_store *ps, store_pool *pool) -{ - if (pool->list != NULL) - { - fprintf(stderr, "%s: %s %s: memory lost (list follows):\n", ps->test, - pool == &ps->read_memory_pool ? "read" : "write", - pool == &ps->read_memory_pool ? (ps->current != NULL ? - ps->current->name : "unknown file") : ps->wname); - ++ps->nerrors; - - do - { - store_memory *next = pool->list; - pool->list = next->next; - next->next = NULL; - - fprintf(stderr, "\t%lu bytes @ %p\n", - (unsigned long)next->size, (PNG_CONST void*)(next+1)); - /* The NULL means this will always return, even if the memory is - * corrupted. - */ - store_memory_free(NULL, pool, next); - } - while (pool->list != NULL); - } - - /* And reset the other fields too for the next time. */ - if (pool->max > pool->max_max) pool->max_max = pool->max; - pool->max = 0; - if (pool->current != 0) /* unexpected internal error */ - fprintf(stderr, "%s: %s %s: memory counter mismatch (internal error)\n", - ps->test, pool == &ps->read_memory_pool ? "read" : "write", - pool == &ps->read_memory_pool ? (ps->current != NULL ? - ps->current->name : "unknown file") : ps->wname); - pool->current = 0; - - if (pool->limit > pool->max_limit) - pool->max_limit = pool->limit; - - pool->limit = 0; - - if (pool->total > pool->max_total) - pool->max_total = pool->total; - - pool->total = 0; - - /* Get a new mark too. */ - store_pool_mark(pool->mark); -} - -/* The memory callbacks: */ -static png_voidp PNGCBAPI -store_malloc(png_structp ppIn, png_alloc_size_t cb) -{ - png_const_structp pp = ppIn; - store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); - store_memory *new = voidcast(store_memory*, malloc(cb + (sizeof *new) + - (sizeof pool->mark))); - - if (new != NULL) - { - if (cb > pool->max) - pool->max = cb; - - pool->current += cb; - - if (pool->current > pool->limit) - pool->limit = pool->current; - - pool->total += cb; - - new->size = cb; - memcpy(new->mark, pool->mark, sizeof new->mark); - memcpy((png_byte*)(new+1) + cb, pool->mark, sizeof pool->mark); - new->pool = pool; - new->next = pool->list; - pool->list = new; - ++new; - } - - else - { - /* NOTE: the PNG user malloc function cannot use the png_ptr it is passed - * other than to retrieve the allocation pointer! libpng calls the - * store_malloc callback in two basic cases: - * - * 1) From png_malloc; png_malloc will do a png_error itself if NULL is - * returned. - * 2) From png_struct or png_info structure creation; png_malloc is - * to return so cleanup can be performed. - * - * To handle this store_malloc can log a message, but can't do anything - * else. - */ - store_log(pool->store, pp, "out of memory", 1 /* is_error */); - } - - return new; -} - -static void PNGCBAPI -store_free(png_structp ppIn, png_voidp memory) -{ - png_const_structp pp = ppIn; - store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); - store_memory *this = voidcast(store_memory*, memory), **test; - - /* Because libpng calls store_free with a dummy png_struct when deleting - * png_struct or png_info via png_destroy_struct_2 it is necessary to check - * the passed in png_structp to ensure it is valid, and not pass it to - * png_error if it is not. - */ - if (pp != pool->store->pread && pp != pool->store->pwrite) - pp = NULL; - - /* First check that this 'memory' really is valid memory - it must be in the - * pool list. If it is, use the shared memory_free function to free it. - */ - --this; - for (test = &pool->list; *test != this; test = &(*test)->next) - { - if (*test == NULL) - { - store_pool_error(pool->store, pp, "bad pointer to free"); - return; - } - } - - /* Unlink this entry, *test == this. */ - *test = this->next; - this->next = NULL; - store_memory_free(pp, pool, this); -} -#endif /* PNG_USER_MEM_SUPPORTED */ - -/* Setup functions. */ -/* Cleanup when aborting a write or after storing the new file. */ -static void -store_write_reset(png_store *ps) -{ - if (ps->pwrite != NULL) - { - anon_context(ps); - - Try - png_destroy_write_struct(&ps->pwrite, &ps->piwrite); - - Catch_anonymous - { - /* memory corruption: continue. */ - } - - ps->pwrite = NULL; - ps->piwrite = NULL; - } - - /* And make sure that all the memory has been freed - this will output - * spurious errors in the case of memory corruption above, but this is safe. - */ -# ifdef PNG_USER_MEM_SUPPORTED - store_pool_delete(ps, &ps->write_memory_pool); -# endif - - store_freenew(ps); -} - -/* The following is the main write function, it returns a png_struct and, - * optionally, a png_info suitable for writiing a new PNG file. Use - * store_storefile above to record this file after it has been written. The - * returned libpng structures as destroyed by store_write_reset above. - */ -static png_structp -set_store_for_write(png_store *ps, png_infopp ppi, - PNG_CONST char * volatile name) -{ - anon_context(ps); - - Try - { - if (ps->pwrite != NULL) - png_error(ps->pwrite, "write store already in use"); - - store_write_reset(ps); - safecat(ps->wname, sizeof ps->wname, 0, name); - - /* Don't do the slow memory checks if doing a speed test, also if user - * memory is not supported we can't do it anyway. - */ -# ifdef PNG_USER_MEM_SUPPORTED - if (!ps->speed) - ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, - ps, store_error, store_warning, &ps->write_memory_pool, - store_malloc, store_free); - - else -# endif - ps->pwrite = png_create_write_struct(png_get_libpng_ver(NULL), - ps, store_error, store_warning); - - png_set_write_fn(ps->pwrite, ps, store_write, store_flush); - -# ifdef PNG_SET_OPTION_SUPPORTED - { - int opt; - for (opt=0; opt<ps->noptions; ++opt) - if (png_set_option(ps->pwrite, ps->options[opt].option, - ps->options[opt].setting) == PNG_OPTION_INVALID) - png_error(ps->pwrite, "png option invalid"); - } -# endif - - if (ppi != NULL) - *ppi = ps->piwrite = png_create_info_struct(ps->pwrite); - } - - Catch_anonymous - return NULL; - - return ps->pwrite; -} - -/* Cleanup when finished reading (either due to error or in the success case). - * This routine exists even when there is no read support to make the code - * tidier (avoid a mass of ifdefs) and so easier to maintain. - */ -static void -store_read_reset(png_store *ps) -{ -# ifdef PNG_READ_SUPPORTED - if (ps->pread != NULL) - { - anon_context(ps); - - Try - png_destroy_read_struct(&ps->pread, &ps->piread, NULL); - - Catch_anonymous - { - /* error already output: continue */ - } - - ps->pread = NULL; - ps->piread = NULL; - } -# endif - -# ifdef PNG_USER_MEM_SUPPORTED - /* Always do this to be safe. */ - store_pool_delete(ps, &ps->read_memory_pool); -# endif - - ps->current = NULL; - ps->next = NULL; - ps->readpos = 0; - ps->validated = 0; -} - -#ifdef PNG_READ_SUPPORTED -static void -store_read_set(png_store *ps, png_uint_32 id) -{ - png_store_file *pf = ps->saved; - - while (pf != NULL) - { - if (pf->id == id) - { - ps->current = pf; - ps->next = NULL; - store_read_buffer_next(ps); - return; - } - - pf = pf->next; - } - - { - size_t pos; - char msg[FILE_NAME_SIZE+64]; - - pos = standard_name_from_id(msg, sizeof msg, 0, id); - pos = safecat(msg, sizeof msg, pos, ": file not found"); - png_error(ps->pread, msg); - } -} - -/* The main interface for reading a saved file - pass the id number of the file - * to retrieve. Ids must be unique or the earlier file will be hidden. The API - * returns a png_struct and, optionally, a png_info. Both of these will be - * destroyed by store_read_reset above. - */ -static png_structp -set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, - PNG_CONST char *name) -{ - /* Set the name for png_error */ - safecat(ps->test, sizeof ps->test, 0, name); - - if (ps->pread != NULL) - png_error(ps->pread, "read store already in use"); - - store_read_reset(ps); - - /* Both the create APIs can return NULL if used in their default mode - * (because there is no other way of handling an error because the jmp_buf - * by default is stored in png_struct and that has not been allocated!) - * However, given that store_error works correctly in these circumstances - * we don't ever expect NULL in this program. - */ -# ifdef PNG_USER_MEM_SUPPORTED - if (!ps->speed) - ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps, - store_error, store_warning, &ps->read_memory_pool, store_malloc, - store_free); - - else -# endif - ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps, store_error, - store_warning); - - if (ps->pread == NULL) - { - struct exception_context *the_exception_context = &ps->exception_context; - - store_log(ps, NULL, "png_create_read_struct returned NULL (unexpected)", - 1 /*error*/); - - Throw ps; - } - -# ifdef PNG_SET_OPTION_SUPPORTED - { - int opt; - for (opt=0; opt<ps->noptions; ++opt) - if (png_set_option(ps->pread, ps->options[opt].option, - ps->options[opt].setting) == PNG_OPTION_INVALID) - png_error(ps->pread, "png option invalid"); - } -# endif - - store_read_set(ps, id); - - if (ppi != NULL) - *ppi = ps->piread = png_create_info_struct(ps->pread); - - return ps->pread; -} -#endif /* PNG_READ_SUPPORTED */ - -/* The overall cleanup of a store simply calls the above then removes all the - * saved files. This does not delete the store itself. - */ -static void -store_delete(png_store *ps) -{ - store_write_reset(ps); - store_read_reset(ps); - store_freefile(&ps->saved); - store_image_free(ps, NULL); -} - -/*********************** PNG FILE MODIFICATION ON READ ************************/ -/* Files may be modified on read. The following structure contains a complete - * png_store together with extra members to handle modification and a special - * read callback for libpng. To use this the 'modifications' field must be set - * to a list of png_modification structures that actually perform the - * modification, otherwise a png_modifier is functionally equivalent to a - * png_store. There is a special read function, set_modifier_for_read, which - * replaces set_store_for_read. - */ -typedef enum modifier_state -{ - modifier_start, /* Initial value */ - modifier_signature, /* Have a signature */ - modifier_IHDR /* Have an IHDR */ -} modifier_state; - -typedef struct CIE_color -{ - /* A single CIE tristimulus value, representing the unique response of a - * standard observer to a variety of light spectra. The observer recognizes - * all spectra that produce this response as the same color, therefore this - * is effectively a description of a color. - */ - double X, Y, Z; -} CIE_color; - -typedef struct color_encoding -{ - /* A description of an (R,G,B) encoding of color (as defined above); this - * includes the actual colors of the (R,G,B) triples (1,0,0), (0,1,0) and - * (0,0,1) plus an encoding value that is used to encode the linear - * components R, G and B to give the actual values R^gamma, G^gamma and - * B^gamma that are stored. - */ - double gamma; /* Encoding (file) gamma of space */ - CIE_color red, green, blue; /* End points */ -} color_encoding; - -#ifdef PNG_READ_SUPPORTED -static double -chromaticity_x(CIE_color c) -{ - return c.X / (c.X + c.Y + c.Z); -} - -static double -chromaticity_y(CIE_color c) -{ - return c.Y / (c.X + c.Y + c.Z); -} - -static CIE_color -white_point(PNG_CONST color_encoding *encoding) -{ - CIE_color white; - - white.X = encoding->red.X + encoding->green.X + encoding->blue.X; - white.Y = encoding->red.Y + encoding->green.Y + encoding->blue.Y; - white.Z = encoding->red.Z + encoding->green.Z + encoding->blue.Z; - - return white; -} - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -static void -normalize_color_encoding(color_encoding *encoding) -{ - PNG_CONST double whiteY = encoding->red.Y + encoding->green.Y + - encoding->blue.Y; - - if (whiteY != 1) - { - encoding->red.X /= whiteY; - encoding->red.Y /= whiteY; - encoding->red.Z /= whiteY; - encoding->green.X /= whiteY; - encoding->green.Y /= whiteY; - encoding->green.Z /= whiteY; - encoding->blue.X /= whiteY; - encoding->blue.Y /= whiteY; - encoding->blue.Z /= whiteY; - } -} -#endif - -static size_t -safecat_color_encoding(char *buffer, size_t bufsize, size_t pos, - PNG_CONST color_encoding *e, double encoding_gamma) -{ - if (e != 0) - { - if (encoding_gamma != 0) - pos = safecat(buffer, bufsize, pos, "("); - pos = safecat(buffer, bufsize, pos, "R("); - pos = safecatd(buffer, bufsize, pos, e->red.X, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->red.Y, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->red.Z, 4); - pos = safecat(buffer, bufsize, pos, "),G("); - pos = safecatd(buffer, bufsize, pos, e->green.X, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->green.Y, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->green.Z, 4); - pos = safecat(buffer, bufsize, pos, "),B("); - pos = safecatd(buffer, bufsize, pos, e->blue.X, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->blue.Y, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->blue.Z, 4); - pos = safecat(buffer, bufsize, pos, ")"); - if (encoding_gamma != 0) - pos = safecat(buffer, bufsize, pos, ")"); - } - - if (encoding_gamma != 0) - { - pos = safecat(buffer, bufsize, pos, "^"); - pos = safecatd(buffer, bufsize, pos, encoding_gamma, 5); - } - - return pos; -} -#endif /* PNG_READ_SUPPORTED */ - -typedef struct png_modifier -{ - png_store this; /* I am a png_store */ - struct png_modification *modifications; /* Changes to make */ - - modifier_state state; /* My state */ - - /* Information from IHDR: */ - png_byte bit_depth; /* From IHDR */ - png_byte colour_type; /* From IHDR */ - - /* While handling PLTE, IDAT and IEND these chunks may be pended to allow - * other chunks to be inserted. - */ - png_uint_32 pending_len; - png_uint_32 pending_chunk; - - /* Test values */ - double *gammas; - unsigned int ngammas; - unsigned int ngamma_tests; /* Number of gamma tests to run*/ - double current_gamma; /* 0 if not set */ - PNG_CONST color_encoding *encodings; - unsigned int nencodings; - PNG_CONST color_encoding *current_encoding; /* If an encoding has been set */ - unsigned int encoding_counter; /* For iteration */ - int encoding_ignored; /* Something overwrote it */ - - /* Control variables used to iterate through possible encodings, the - * following must be set to 0 and tested by the function that uses the - * png_modifier because the modifier only sets it to 1 (true.) - */ - unsigned int repeat :1; /* Repeat this transform test. */ - unsigned int test_uses_encoding :1; - - /* Lowest sbit to test (libpng fails for sbit < 8) */ - png_byte sbitlow; - - /* Error control - these are the limits on errors accepted by the gamma tests - * below. - */ - double maxout8; /* Maximum output value error */ - double maxabs8; /* Absolute sample error 0..1 */ - double maxcalc8; /* Absolute sample error 0..1 */ - double maxpc8; /* Percentage sample error 0..100% */ - double maxout16; /* Maximum output value error */ - double maxabs16; /* Absolute sample error 0..1 */ - double maxcalc16;/* Absolute sample error 0..1 */ - double maxcalcG; /* Absolute sample error 0..1 */ - double maxpc16; /* Percentage sample error 0..100% */ - - /* This is set by transforms that need to allow a higher limit, it is an - * internal check on pngvalid to ensure that the calculated error limits are - * not ridiculous; without this it is too easy to make a mistake in pngvalid - * that allows any value through. - */ - double limit; /* limit on error values, normally 4E-3 */ - - /* Log limits - values above this are logged, but not necessarily - * warned. - */ - double log8; /* Absolute error in 8 bits to log */ - double log16; /* Absolute error in 16 bits to log */ - - /* Logged 8 and 16 bit errors ('output' values): */ - double error_gray_2; - double error_gray_4; - double error_gray_8; - double error_gray_16; - double error_color_8; - double error_color_16; - double error_indexed; - - /* Flags: */ - /* Whether to call png_read_update_info, not png_read_start_image, and how - * many times to call it. - */ - int use_update_info; - - /* Whether or not to interlace. */ - int interlace_type :9; /* int, but must store '1' */ - - /* Run the standard tests? */ - unsigned int test_standard :1; - - /* Run the odd-sized image and interlace read/write tests? */ - unsigned int test_size :1; - - /* Run tests on reading with a combination of transforms, */ - unsigned int test_transform :1; - - /* When to use the use_input_precision option, this controls the gamma - * validation code checks. If set any value that is within the transformed - * range input-.5 to input+.5 will be accepted, otherwise the value must be - * within the normal limits. It should not be necessary to set this; the - * result should always be exact within the permitted error limits. - */ - unsigned int use_input_precision :1; - unsigned int use_input_precision_sbit :1; - unsigned int use_input_precision_16to8 :1; - - /* If set assume that the calculation bit depth is set by the input - * precision, not the output precision. - */ - unsigned int calculations_use_input_precision :1; - - /* If set assume that the calculations are done in 16 bits even if the sample - * depth is 8 bits. - */ - unsigned int assume_16_bit_calculations :1; - - /* Which gamma tests to run: */ - unsigned int test_gamma_threshold :1; - unsigned int test_gamma_transform :1; /* main tests */ - unsigned int test_gamma_sbit :1; - unsigned int test_gamma_scale16 :1; - unsigned int test_gamma_background :1; - unsigned int test_gamma_alpha_mode :1; - unsigned int test_gamma_expand16 :1; - unsigned int test_exhaustive :1; - - unsigned int log :1; /* Log max error */ - - /* Buffer information, the buffer size limits the size of the chunks that can - * be modified - they must fit (including header and CRC) into the buffer! - */ - size_t flush; /* Count of bytes to flush */ - size_t buffer_count; /* Bytes in buffer */ - size_t buffer_position; /* Position in buffer */ - png_byte buffer[1024]; -} png_modifier; - -/* This returns true if the test should be stopped now because it has already - * failed and it is running silently. - */ -static int fail(png_modifier *pm) -{ - return !pm->log && !pm->this.verbose && (pm->this.nerrors > 0 || - (pm->this.treat_warnings_as_errors && pm->this.nwarnings > 0)); -} - -static void -modifier_init(png_modifier *pm) -{ - memset(pm, 0, sizeof *pm); - store_init(&pm->this); - pm->modifications = NULL; - pm->state = modifier_start; - pm->sbitlow = 1U; - pm->ngammas = 0; - pm->ngamma_tests = 0; - pm->gammas = 0; - pm->current_gamma = 0; - pm->encodings = 0; - pm->nencodings = 0; - pm->current_encoding = 0; - pm->encoding_counter = 0; - pm->encoding_ignored = 0; - pm->repeat = 0; - pm->test_uses_encoding = 0; - pm->maxout8 = pm->maxpc8 = pm->maxabs8 = pm->maxcalc8 = 0; - pm->maxout16 = pm->maxpc16 = pm->maxabs16 = pm->maxcalc16 = 0; - pm->maxcalcG = 0; - pm->limit = 4E-3; - pm->log8 = pm->log16 = 0; /* Means 'off' */ - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = 0; - pm->error_gray_16 = pm->error_color_8 = pm->error_color_16 = 0; - pm->error_indexed = 0; - pm->use_update_info = 0; - pm->interlace_type = PNG_INTERLACE_NONE; - pm->test_standard = 0; - pm->test_size = 0; - pm->test_transform = 0; - pm->use_input_precision = 0; - pm->use_input_precision_sbit = 0; - pm->use_input_precision_16to8 = 0; - pm->calculations_use_input_precision = 0; - pm->assume_16_bit_calculations = 0; - pm->test_gamma_threshold = 0; - pm->test_gamma_transform = 0; - pm->test_gamma_sbit = 0; - pm->test_gamma_scale16 = 0; - pm->test_gamma_background = 0; - pm->test_gamma_alpha_mode = 0; - pm->test_gamma_expand16 = 0; - pm->test_exhaustive = 0; - pm->log = 0; - - /* Rely on the memset for all the other fields - there are no pointers */ -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - -/* This controls use of checks that explicitly know how libpng digitizes the - * samples in calculations; setting this circumvents simple error limit checking - * in the rgb_to_gray check, replacing it with an exact copy of the libpng 1.5 - * algorithm. - */ -#define DIGITIZE PNG_LIBPNG_VER < 10700 - -/* If pm->calculations_use_input_precision is set then operations will happen - * with the precision of the input, not the precision of the output depth. - * - * If pm->assume_16_bit_calculations is set then even 8 bit calculations use 16 - * bit precision. This only affects those of the following limits that pertain - * to a calculation - not a digitization operation - unless the following API is - * called directly. - */ -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -#if DIGITIZE -static double digitize(double value, int depth, int do_round) -{ - /* 'value' is in the range 0 to 1, the result is the same value rounded to a - * multiple of the digitization factor - 8 or 16 bits depending on both the - * sample depth and the 'assume' setting. Digitization is normally by - * rounding and 'do_round' should be 1, if it is 0 the digitized value will - * be truncated. - */ - PNG_CONST unsigned int digitization_factor = (1U << depth) -1; - - /* Limiting the range is done as a convenience to the caller - it's easier to - * do it once here than every time at the call site. - */ - if (value <= 0) - value = 0; - - else if (value >= 1) - value = 1; - - value *= digitization_factor; - if (do_round) value += .5; - return floor(value)/digitization_factor; -} -#endif -#endif /* RGB_TO_GRAY */ - -#ifdef PNG_READ_GAMMA_SUPPORTED -static double abserr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) -{ - /* Absolute error permitted in linear values - affected by the bit depth of - * the calculations. - */ - if (pm->assume_16_bit_calculations || - (pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxabs16; - else - return pm->maxabs8; -} - -static double calcerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) -{ - /* Error in the linear composition arithmetic - only relevant when - * composition actually happens (0 < alpha < 1). - */ - if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxcalc16; - else if (pm->assume_16_bit_calculations) - return pm->maxcalcG; - else - return pm->maxcalc8; -} - -static double pcerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) -{ - /* Percentage error permitted in the linear values. Note that the specified - * value is a percentage but this routine returns a simple number. - */ - if (pm->assume_16_bit_calculations || - (pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxpc16 * .01; - else - return pm->maxpc8 * .01; -} - -/* Output error - the error in the encoded value. This is determined by the - * digitization of the output so can be +/-0.5 in the actual output value. In - * the expand_16 case with the current code in libpng the expand happens after - * all the calculations are done in 8 bit arithmetic, so even though the output - * depth is 16 the output error is determined by the 8 bit calculation. - * - * This limit is not determined by the bit depth of internal calculations. - * - * The specified parameter does *not* include the base .5 digitization error but - * it is added here. - */ -static double outerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) -{ - /* There is a serious error in the 2 and 4 bit grayscale transform because - * the gamma table value (8 bits) is simply shifted, not rounded, so the - * error in 4 bit grayscale gamma is up to the value below. This is a hack - * to allow pngvalid to succeed: - * - * TODO: fix this in libpng - */ - if (out_depth == 2) - return .73182-.5; - - if (out_depth == 4) - return .90644-.5; - - if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxout16; - - /* This is the case where the value was calculated at 8-bit precision then - * scaled to 16 bits. - */ - else if (out_depth == 16) - return pm->maxout8 * 257; - - else - return pm->maxout8; -} - -/* This does the same thing as the above however it returns the value to log, - * rather than raising a warning. This is useful for debugging to track down - * exactly what set of parameters cause high error values. - */ -static double outlog(PNG_CONST png_modifier *pm, int in_depth, int out_depth) -{ - /* The command line parameters are either 8 bit (0..255) or 16 bit (0..65535) - * and so must be adjusted for low bit depth grayscale: - */ - if (out_depth <= 8) - { - if (pm->log8 == 0) /* switched off */ - return 256; - - if (out_depth < 8) - return pm->log8 / 255 * ((1<<out_depth)-1); - - return pm->log8; - } - - if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - { - if (pm->log16 == 0) - return 65536; - - return pm->log16; - } - - /* This is the case where the value was calculated at 8-bit precision then - * scaled to 16 bits. - */ - if (pm->log8 == 0) - return 65536; - - return pm->log8 * 257; -} - -/* This complements the above by providing the appropriate quantization for the - * final value. Normally this would just be quantization to an integral value, - * but in the 8 bit calculation case it's actually quantization to a multiple of - * 257! - */ -static int output_quantization_factor(PNG_CONST png_modifier *pm, int in_depth, - int out_depth) -{ - if (out_depth == 16 && in_depth != 16 && - pm->calculations_use_input_precision) - return 257; - else - return 1; -} -#endif /* PNG_READ_GAMMA_SUPPORTED */ - -/* One modification structure must be provided for each chunk to be modified (in - * fact more than one can be provided if multiple separate changes are desired - * for a single chunk.) Modifications include adding a new chunk when a - * suitable chunk does not exist. - * - * The caller of modify_fn will reset the CRC of the chunk and record 'modified' - * or 'added' as appropriate if the modify_fn returns 1 (true). If the - * modify_fn is NULL the chunk is simply removed. - */ -typedef struct png_modification -{ - struct png_modification *next; - png_uint_32 chunk; - - /* If the following is NULL all matching chunks will be removed: */ - int (*modify_fn)(struct png_modifier *pm, - struct png_modification *me, int add); - - /* If the following is set to PLTE, IDAT or IEND and the chunk has not been - * found and modified (and there is a modify_fn) the modify_fn will be called - * to add the chunk before the relevant chunk. - */ - png_uint_32 add; - unsigned int modified :1; /* Chunk was modified */ - unsigned int added :1; /* Chunk was added */ - unsigned int removed :1; /* Chunk was removed */ -} png_modification; - -static void -modification_reset(png_modification *pmm) -{ - if (pmm != NULL) - { - pmm->modified = 0; - pmm->added = 0; - pmm->removed = 0; - modification_reset(pmm->next); - } -} - -static void -modification_init(png_modification *pmm) -{ - memset(pmm, 0, sizeof *pmm); - pmm->next = NULL; - pmm->chunk = 0; - pmm->modify_fn = NULL; - pmm->add = 0; - modification_reset(pmm); -} - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -static void -modifier_current_encoding(PNG_CONST png_modifier *pm, color_encoding *ce) -{ - if (pm->current_encoding != 0) - *ce = *pm->current_encoding; - - else - memset(ce, 0, sizeof *ce); - - ce->gamma = pm->current_gamma; -} -#endif - -static size_t -safecat_current_encoding(char *buffer, size_t bufsize, size_t pos, - PNG_CONST png_modifier *pm) -{ - pos = safecat_color_encoding(buffer, bufsize, pos, pm->current_encoding, - pm->current_gamma); - - if (pm->encoding_ignored) - pos = safecat(buffer, bufsize, pos, "[overridden]"); - - return pos; -} - -/* Iterate through the usefully testable color encodings. An encoding is one - * of: - * - * 1) Nothing (no color space, no gamma). - * 2) Just a gamma value from the gamma array (including 1.0) - * 3) A color space from the encodings array with the corresponding gamma. - * 4) The same, but with gamma 1.0 (only really useful with 16 bit calculations) - * - * The iterator selects these in turn, the randomizer selects one at random, - * which is used depends on the setting of the 'test_exhaustive' flag. Notice - * that this function changes the colour space encoding so it must only be - * called on completion of the previous test. This is what 'modifier_reset' - * does, below. - * - * After the function has been called the 'repeat' flag will still be set; the - * caller of modifier_reset must reset it at the start of each run of the test! - */ -static unsigned int -modifier_total_encodings(PNG_CONST png_modifier *pm) -{ - return 1 + /* (1) nothing */ - pm->ngammas + /* (2) gamma values to test */ - pm->nencodings + /* (3) total number of encodings */ - /* The following test only works after the first time through the - * png_modifier code because 'bit_depth' is set when the IHDR is read. - * modifier_reset, below, preserves the setting until after it has called - * the iterate function (also below.) - * - * For this reason do not rely on this function outside a call to - * modifier_reset. - */ - ((pm->bit_depth == 16 || pm->assume_16_bit_calculations) ? - pm->nencodings : 0); /* (4) encodings with gamma == 1.0 */ -} - -static void -modifier_encoding_iterate(png_modifier *pm) -{ - if (!pm->repeat && /* Else something needs the current encoding again. */ - pm->test_uses_encoding) /* Some transform is encoding dependent */ - { - if (pm->test_exhaustive) - { - if (++pm->encoding_counter >= modifier_total_encodings(pm)) - pm->encoding_counter = 0; /* This will stop the repeat */ - } - - else - { - /* Not exhaustive - choose an encoding at random; generate a number in - * the range 1..(max-1), so the result is always non-zero: - */ - if (pm->encoding_counter == 0) - pm->encoding_counter = random_mod(modifier_total_encodings(pm)-1)+1; - else - pm->encoding_counter = 0; - } - - if (pm->encoding_counter > 0) - pm->repeat = 1; - } - - else if (!pm->repeat) - pm->encoding_counter = 0; -} - -static void -modifier_reset(png_modifier *pm) -{ - store_read_reset(&pm->this); - pm->limit = 4E-3; - pm->pending_len = pm->pending_chunk = 0; - pm->flush = pm->buffer_count = pm->buffer_position = 0; - pm->modifications = NULL; - pm->state = modifier_start; - modifier_encoding_iterate(pm); - /* The following must be set in the next run. In particular - * test_uses_encodings must be set in the _ini function of each transform - * that looks at the encodings. (Not the 'add' function!) - */ - pm->test_uses_encoding = 0; - pm->current_gamma = 0; - pm->current_encoding = 0; - pm->encoding_ignored = 0; - /* These only become value after IHDR is read: */ - pm->bit_depth = pm->colour_type = 0; -} - -/* The following must be called before anything else to get the encoding set up - * on the modifier. In particular it must be called before the transform init - * functions are called. - */ -static void -modifier_set_encoding(png_modifier *pm) -{ - /* Set the encoding to the one specified by the current encoding counter, - * first clear out all the settings - this corresponds to an encoding_counter - * of 0. - */ - pm->current_gamma = 0; - pm->current_encoding = 0; - pm->encoding_ignored = 0; /* not ignored yet - happens in _ini functions. */ - - /* Now, if required, set the gamma and encoding fields. */ - if (pm->encoding_counter > 0) - { - /* The gammas[] array is an array of screen gammas, not encoding gammas, - * so we need the inverse: - */ - if (pm->encoding_counter <= pm->ngammas) - pm->current_gamma = 1/pm->gammas[pm->encoding_counter-1]; - - else - { - unsigned int i = pm->encoding_counter - pm->ngammas; - - if (i >= pm->nencodings) - { - i %= pm->nencodings; - pm->current_gamma = 1; /* Linear, only in the 16 bit case */ - } - - else - pm->current_gamma = pm->encodings[i].gamma; - - pm->current_encoding = pm->encodings + i; - } - } -} - -/* Enquiry functions to find out what is set. Notice that there is an implicit - * assumption below that the first encoding in the list is the one for sRGB. - */ -static int -modifier_color_encoding_is_sRGB(PNG_CONST png_modifier *pm) -{ - return pm->current_encoding != 0 && pm->current_encoding == pm->encodings && - pm->current_encoding->gamma == pm->current_gamma; -} - -static int -modifier_color_encoding_is_set(PNG_CONST png_modifier *pm) -{ - return pm->current_gamma != 0; -} - -/* Convenience macros. */ -#define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) -#define CHUNK_IHDR CHUNK(73,72,68,82) -#define CHUNK_PLTE CHUNK(80,76,84,69) -#define CHUNK_IDAT CHUNK(73,68,65,84) -#define CHUNK_IEND CHUNK(73,69,78,68) -#define CHUNK_cHRM CHUNK(99,72,82,77) -#define CHUNK_gAMA CHUNK(103,65,77,65) -#define CHUNK_sBIT CHUNK(115,66,73,84) -#define CHUNK_sRGB CHUNK(115,82,71,66) - -/* The guts of modification are performed during a read. */ -static void -modifier_crc(png_bytep buffer) -{ - /* Recalculate the chunk CRC - a complete chunk must be in - * the buffer, at the start. - */ - uInt datalen = png_get_uint_32(buffer); - uLong crc = crc32(0, buffer+4, datalen+4); - /* The cast to png_uint_32 is safe because a crc32 is always a 32 bit value. - */ - png_save_uint_32(buffer+datalen+8, (png_uint_32)crc); -} - -static void -modifier_setbuffer(png_modifier *pm) -{ - modifier_crc(pm->buffer); - pm->buffer_count = png_get_uint_32(pm->buffer)+12; - pm->buffer_position = 0; -} - -/* Separate the callback into the actual implementation (which is passed the - * png_modifier explicitly) and the callback, which gets the modifier from the - * png_struct. - */ -static void -modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) -{ - while (st > 0) - { - size_t cb; - png_uint_32 len, chunk; - png_modification *mod; - - if (pm->buffer_position >= pm->buffer_count) switch (pm->state) - { - static png_byte sign[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; - case modifier_start: - store_read_imp(&pm->this, pm->buffer, 8); /* size of signature. */ - pm->buffer_count = 8; - pm->buffer_position = 0; - - if (memcmp(pm->buffer, sign, 8) != 0) - png_error(pm->this.pread, "invalid PNG file signature"); - pm->state = modifier_signature; - break; - - case modifier_signature: - store_read_imp(&pm->this, pm->buffer, 13+12); /* size of IHDR */ - pm->buffer_count = 13+12; - pm->buffer_position = 0; - - if (png_get_uint_32(pm->buffer) != 13 || - png_get_uint_32(pm->buffer+4) != CHUNK_IHDR) - png_error(pm->this.pread, "invalid IHDR"); - - /* Check the list of modifiers for modifications to the IHDR. */ - mod = pm->modifications; - while (mod != NULL) - { - if (mod->chunk == CHUNK_IHDR && mod->modify_fn && - (*mod->modify_fn)(pm, mod, 0)) - { - mod->modified = 1; - modifier_setbuffer(pm); - } - - /* Ignore removal or add if IHDR! */ - mod = mod->next; - } - - /* Cache information from the IHDR (the modified one.) */ - pm->bit_depth = pm->buffer[8+8]; - pm->colour_type = pm->buffer[8+8+1]; - - pm->state = modifier_IHDR; - pm->flush = 0; - break; - - case modifier_IHDR: - default: - /* Read a new chunk and process it until we see PLTE, IDAT or - * IEND. 'flush' indicates that there is still some data to - * output from the preceding chunk. - */ - if ((cb = pm->flush) > 0) - { - if (cb > st) cb = st; - pm->flush -= cb; - store_read_imp(&pm->this, pb, cb); - pb += cb; - st -= cb; - if (st == 0) return; - } - - /* No more bytes to flush, read a header, or handle a pending - * chunk. - */ - if (pm->pending_chunk != 0) - { - png_save_uint_32(pm->buffer, pm->pending_len); - png_save_uint_32(pm->buffer+4, pm->pending_chunk); - pm->pending_len = 0; - pm->pending_chunk = 0; - } - else - store_read_imp(&pm->this, pm->buffer, 8); - - pm->buffer_count = 8; - pm->buffer_position = 0; - - /* Check for something to modify or a terminator chunk. */ - len = png_get_uint_32(pm->buffer); - chunk = png_get_uint_32(pm->buffer+4); - - /* Terminators first, they may have to be delayed for added - * chunks - */ - if (chunk == CHUNK_PLTE || chunk == CHUNK_IDAT || - chunk == CHUNK_IEND) - { - mod = pm->modifications; - - while (mod != NULL) - { - if ((mod->add == chunk || - (mod->add == CHUNK_PLTE && chunk == CHUNK_IDAT)) && - mod->modify_fn != NULL && !mod->modified && !mod->added) - { - /* Regardless of what the modify function does do not run - * this again. - */ - mod->added = 1; - - if ((*mod->modify_fn)(pm, mod, 1 /*add*/)) - { - /* Reset the CRC on a new chunk */ - if (pm->buffer_count > 0) - modifier_setbuffer(pm); - - else - { - pm->buffer_position = 0; - mod->removed = 1; - } - - /* The buffer has been filled with something (we assume) - * so output this. Pend the current chunk. - */ - pm->pending_len = len; - pm->pending_chunk = chunk; - break; /* out of while */ - } - } - - mod = mod->next; - } - - /* Don't do any further processing if the buffer was modified - - * otherwise the code will end up modifying a chunk that was - * just added. - */ - if (mod != NULL) - break; /* out of switch */ - } - - /* If we get to here then this chunk may need to be modified. To - * do this it must be less than 1024 bytes in total size, otherwise - * it just gets flushed. - */ - if (len+12 <= sizeof pm->buffer) - { - store_read_imp(&pm->this, pm->buffer+pm->buffer_count, - len+12-pm->buffer_count); - pm->buffer_count = len+12; - - /* Check for a modification, else leave it be. */ - mod = pm->modifications; - while (mod != NULL) - { - if (mod->chunk == chunk) - { - if (mod->modify_fn == NULL) - { - /* Remove this chunk */ - pm->buffer_count = pm->buffer_position = 0; - mod->removed = 1; - break; /* Terminate the while loop */ - } - - else if ((*mod->modify_fn)(pm, mod, 0)) - { - mod->modified = 1; - /* The chunk may have been removed: */ - if (pm->buffer_count == 0) - { - pm->buffer_position = 0; - break; - } - modifier_setbuffer(pm); - } - } - - mod = mod->next; - } - } - - else - pm->flush = len+12 - pm->buffer_count; /* data + crc */ - - /* Take the data from the buffer (if there is any). */ - break; - } - - /* Here to read from the modifier buffer (not directly from - * the store, as in the flush case above.) - */ - cb = pm->buffer_count - pm->buffer_position; - - if (cb > st) - cb = st; - - memcpy(pb, pm->buffer + pm->buffer_position, cb); - st -= cb; - pb += cb; - pm->buffer_position += cb; - } -} - -/* The callback: */ -static void PNGCBAPI -modifier_read(png_structp ppIn, png_bytep pb, png_size_t st) -{ - png_const_structp pp = ppIn; - png_modifier *pm = voidcast(png_modifier*, png_get_io_ptr(pp)); - - if (pm == NULL || pm->this.pread != pp) - png_error(pp, "bad modifier_read call"); - - modifier_read_imp(pm, pb, st); -} - -/* Like store_progressive_read but the data is getting changed as we go so we - * need a local buffer. - */ -static void -modifier_progressive_read(png_modifier *pm, png_structp pp, png_infop pi) -{ - if (pm->this.pread != pp || pm->this.current == NULL || - pm->this.next == NULL) - png_error(pp, "store state damaged (progressive)"); - - /* This is another Horowitz and Hill random noise generator. In this case - * the aim is to stress the progressive reader with truly horrible variable - * buffer sizes in the range 1..500, so a sequence of 9 bit random numbers - * is generated. We could probably just count from 1 to 32767 and get as - * good a result. - */ - for (;;) - { - static png_uint_32 noise = 1; - png_size_t cb, cbAvail; - png_byte buffer[512]; - - /* Generate 15 more bits of stuff: */ - noise = (noise << 9) | ((noise ^ (noise >> (9-5))) & 0x1ff); - cb = noise & 0x1ff; - - /* Check that this number of bytes are available (in the current buffer.) - * (This doesn't quite work - the modifier might delete a chunk; unlikely - * but possible, it doesn't happen at present because the modifier only - * adds chunks to standard images.) - */ - cbAvail = store_read_buffer_avail(&pm->this); - if (pm->buffer_count > pm->buffer_position) - cbAvail += pm->buffer_count - pm->buffer_position; - - if (cb > cbAvail) - { - /* Check for EOF: */ - if (cbAvail == 0) - break; - - cb = cbAvail; - } - - modifier_read_imp(pm, buffer, cb); - png_process_data(pp, pi, buffer, cb); - } - - /* Check the invariants at the end (if this fails it's a problem in this - * file!) - */ - if (pm->buffer_count > pm->buffer_position || - pm->this.next != &pm->this.current->data || - pm->this.readpos < pm->this.current->datacount) - png_error(pp, "progressive read implementation error"); -} - -/* Set up a modifier. */ -static png_structp -set_modifier_for_read(png_modifier *pm, png_infopp ppi, png_uint_32 id, - PNG_CONST char *name) -{ - /* Do this first so that the modifier fields are cleared even if an error - * happens allocating the png_struct. No allocation is done here so no - * cleanup is required. - */ - pm->state = modifier_start; - pm->bit_depth = 0; - pm->colour_type = 255; - - pm->pending_len = 0; - pm->pending_chunk = 0; - pm->flush = 0; - pm->buffer_count = 0; - pm->buffer_position = 0; - - return set_store_for_read(&pm->this, ppi, id, name); -} - - -/******************************** MODIFICATIONS *******************************/ -/* Standard modifications to add chunks. These do not require the _SUPPORTED - * macros because the chunks can be there regardless of whether this specific - * libpng supports them. - */ -typedef struct gama_modification -{ - png_modification this; - png_fixed_point gamma; -} gama_modification; - -static int -gama_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* This simply dumps the given gamma value into the buffer. */ - png_save_uint_32(pm->buffer, 4); - png_save_uint_32(pm->buffer+4, CHUNK_gAMA); - png_save_uint_32(pm->buffer+8, ((gama_modification*)me)->gamma); - return 1; -} - -static void -gama_modification_init(gama_modification *me, png_modifier *pm, double gammad) -{ - double g; - - modification_init(&me->this); - me->this.chunk = CHUNK_gAMA; - me->this.modify_fn = gama_modify; - me->this.add = CHUNK_PLTE; - g = fix(gammad); - me->gamma = (png_fixed_point)g; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -typedef struct chrm_modification -{ - png_modification this; - PNG_CONST color_encoding *encoding; - png_fixed_point wx, wy, rx, ry, gx, gy, bx, by; -} chrm_modification; - -static int -chrm_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* As with gAMA this just adds the required cHRM chunk to the buffer. */ - png_save_uint_32(pm->buffer , 32); - png_save_uint_32(pm->buffer+ 4, CHUNK_cHRM); - png_save_uint_32(pm->buffer+ 8, ((chrm_modification*)me)->wx); - png_save_uint_32(pm->buffer+12, ((chrm_modification*)me)->wy); - png_save_uint_32(pm->buffer+16, ((chrm_modification*)me)->rx); - png_save_uint_32(pm->buffer+20, ((chrm_modification*)me)->ry); - png_save_uint_32(pm->buffer+24, ((chrm_modification*)me)->gx); - png_save_uint_32(pm->buffer+28, ((chrm_modification*)me)->gy); - png_save_uint_32(pm->buffer+32, ((chrm_modification*)me)->bx); - png_save_uint_32(pm->buffer+36, ((chrm_modification*)me)->by); - return 1; -} - -static void -chrm_modification_init(chrm_modification *me, png_modifier *pm, - PNG_CONST color_encoding *encoding) -{ - CIE_color white = white_point(encoding); - - /* Original end points: */ - me->encoding = encoding; - - /* Chromaticities (in fixed point): */ - me->wx = fix(chromaticity_x(white)); - me->wy = fix(chromaticity_y(white)); - - me->rx = fix(chromaticity_x(encoding->red)); - me->ry = fix(chromaticity_y(encoding->red)); - me->gx = fix(chromaticity_x(encoding->green)); - me->gy = fix(chromaticity_y(encoding->green)); - me->bx = fix(chromaticity_x(encoding->blue)); - me->by = fix(chromaticity_y(encoding->blue)); - - modification_init(&me->this); - me->this.chunk = CHUNK_cHRM; - me->this.modify_fn = chrm_modify; - me->this.add = CHUNK_PLTE; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -typedef struct srgb_modification -{ - png_modification this; - png_byte intent; -} srgb_modification; - -static int -srgb_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* As above, ignore add and just make a new chunk */ - png_save_uint_32(pm->buffer, 1); - png_save_uint_32(pm->buffer+4, CHUNK_sRGB); - pm->buffer[8] = ((srgb_modification*)me)->intent; - return 1; -} - -static void -srgb_modification_init(srgb_modification *me, png_modifier *pm, png_byte intent) -{ - modification_init(&me->this); - me->this.chunk = CHUNK_sBIT; - - if (intent <= 3) /* if valid, else *delete* sRGB chunks */ - { - me->this.modify_fn = srgb_modify; - me->this.add = CHUNK_PLTE; - me->intent = intent; - } - - else - { - me->this.modify_fn = 0; - me->this.add = 0; - me->intent = 0; - } - - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -#ifdef PNG_READ_GAMMA_SUPPORTED -typedef struct sbit_modification -{ - png_modification this; - png_byte sbit; -} sbit_modification; - -static int -sbit_modify(png_modifier *pm, png_modification *me, int add) -{ - png_byte sbit = ((sbit_modification*)me)->sbit; - if (pm->bit_depth > sbit) - { - int cb = 0; - switch (pm->colour_type) - { - case 0: - cb = 1; - break; - - case 2: - case 3: - cb = 3; - break; - - case 4: - cb = 2; - break; - - case 6: - cb = 4; - break; - - default: - png_error(pm->this.pread, - "unexpected colour type in sBIT modification"); - } - - png_save_uint_32(pm->buffer, cb); - png_save_uint_32(pm->buffer+4, CHUNK_sBIT); - - while (cb > 0) - (pm->buffer+8)[--cb] = sbit; - - return 1; - } - else if (!add) - { - /* Remove the sBIT chunk */ - pm->buffer_count = pm->buffer_position = 0; - return 1; - } - else - return 0; /* do nothing */ -} - -static void -sbit_modification_init(sbit_modification *me, png_modifier *pm, png_byte sbit) -{ - modification_init(&me->this); - me->this.chunk = CHUNK_sBIT; - me->this.modify_fn = sbit_modify; - me->this.add = CHUNK_PLTE; - me->sbit = sbit; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} -#endif /* PNG_READ_GAMMA_SUPPORTED */ -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -/***************************** STANDARD PNG FILES *****************************/ -/* Standard files - write and save standard files. */ -/* There are two basic forms of standard images. Those which attempt to have - * all the possible pixel values (not possible for 16bpp images, but a range of - * values are produced) and those which have a range of image sizes. The former - * are used for testing transforms, in particular gamma correction and bit - * reduction and increase. The latter are reserved for testing the behavior of - * libpng with respect to 'odd' image sizes - particularly small images where - * rows become 1 byte and interlace passes disappear. - * - * The first, most useful, set are the 'transform' images, the second set of - * small images are the 'size' images. - * - * The transform files are constructed with rows which fit into a 1024 byte row - * buffer. This makes allocation easier below. Further regardless of the file - * format every row has 128 pixels (giving 1024 bytes for 64bpp formats). - * - * Files are stored with no gAMA or sBIT chunks, with a PLTE only when needed - * and with an ID derived from the colour type, bit depth and interlace type - * as above (FILEID). The width (128) and height (variable) are not stored in - * the FILEID - instead the fields are set to 0, indicating a transform file. - * - * The size files ar constructed with rows a maximum of 128 bytes wide, allowing - * a maximum width of 16 pixels (for the 64bpp case.) They also have a maximum - * height of 16 rows. The width and height are stored in the FILEID and, being - * non-zero, indicate a size file. - * - * Because the PNG filter code is typically the largest CPU consumer within - * libpng itself there is a tendency to attempt to optimize it. This results in - * special case code which needs to be validated. To cause this to happen the - * 'size' images are made to use each possible filter, in so far as this is - * possible for smaller images. - * - * For palette image (colour type 3) multiple transform images are stored with - * the same bit depth to allow testing of more colour combinations - - * particularly important for testing the gamma code because libpng uses a - * different code path for palette images. For size images a single palette is - * used. - */ - -/* Make a 'standard' palette. Because there are only 256 entries in a palette - * (maximum) this actually makes a random palette in the hope that enough tests - * will catch enough errors. (Note that the same palette isn't produced every - * time for the same test - it depends on what previous tests have been run - - * but a given set of arguments to pngvalid will always produce the same palette - * at the same test! This is why pseudo-random number generators are useful for - * testing.) - * - * The store must be open for write when this is called, otherwise an internal - * error will occur. This routine contains its own magic number seed, so the - * palettes generated don't change if there are intervening errors (changing the - * calls to the store_mark seed.) - */ -static store_palette_entry * -make_standard_palette(png_store* ps, int npalette, int do_tRNS) -{ - static png_uint_32 palette_seed[2] = { 0x87654321, 9 }; - - int i = 0; - png_byte values[256][4]; - - /* Always put in black and white plus the six primary and secondary colors. - */ - for (; i<8; ++i) - { - values[i][1] = (png_byte)((i&1) ? 255U : 0U); - values[i][2] = (png_byte)((i&2) ? 255U : 0U); - values[i][3] = (png_byte)((i&4) ? 255U : 0U); - } - - /* Then add 62 grays (one quarter of the remaining 256 slots). */ - { - int j = 0; - png_byte random_bytes[4]; - png_byte need[256]; - - need[0] = 0; /*got black*/ - memset(need+1, 1, (sizeof need)-2); /*need these*/ - need[255] = 0; /*but not white*/ - - while (i<70) - { - png_byte b; - - if (j==0) - { - make_four_random_bytes(palette_seed, random_bytes); - j = 4; - } - - b = random_bytes[--j]; - if (need[b]) - { - values[i][1] = b; - values[i][2] = b; - values[i++][3] = b; - } - } - } - - /* Finally add 192 colors at random - don't worry about matches to things we - * already have, chance is less than 1/65536. Don't worry about grays, - * chance is the same, so we get a duplicate or extra gray less than 1 time - * in 170. - */ - for (; i<256; ++i) - make_four_random_bytes(palette_seed, values[i]); - - /* Fill in the alpha values in the first byte. Just use all possible values - * (0..255) in an apparently random order: - */ - { - store_palette_entry *palette; - png_byte selector[4]; - - make_four_random_bytes(palette_seed, selector); - - if (do_tRNS) - for (i=0; i<256; ++i) - values[i][0] = (png_byte)(i ^ selector[0]); - - else - for (i=0; i<256; ++i) - values[i][0] = 255; /* no transparency/tRNS chunk */ - - /* 'values' contains 256 ARGB values, but we only need 'npalette'. - * 'npalette' will always be a power of 2: 2, 4, 16 or 256. In the low - * bit depth cases select colors at random, else it is difficult to have - * a set of low bit depth palette test with any chance of a reasonable - * range of colors. Do this by randomly permuting values into the low - * 'npalette' entries using an XOR mask generated here. This also - * permutes the npalette == 256 case in a potentially useful way (there is - * no relationship between palette index and the color value therein!) - */ - palette = store_write_palette(ps, npalette); - - for (i=0; i<npalette; ++i) - { - palette[i].alpha = values[i ^ selector[1]][0]; - palette[i].red = values[i ^ selector[1]][1]; - palette[i].green = values[i ^ selector[1]][2]; - palette[i].blue = values[i ^ selector[1]][3]; - } - - return palette; - } -} - -/* Initialize a standard palette on a write stream. The 'do_tRNS' argument - * indicates whether or not to also set the tRNS chunk. - */ -/* TODO: the png_structp here can probably be 'const' in the future */ -static void -init_standard_palette(png_store *ps, png_structp pp, png_infop pi, int npalette, - int do_tRNS) -{ - store_palette_entry *ppal = make_standard_palette(ps, npalette, do_tRNS); - - { - int i; - png_color palette[256]; - - /* Set all entries to detect overread errors. */ - for (i=0; i<npalette; ++i) - { - palette[i].red = ppal[i].red; - palette[i].green = ppal[i].green; - palette[i].blue = ppal[i].blue; - } - - /* Just in case fill in the rest with detectable values: */ - for (; i<256; ++i) - palette[i].red = palette[i].green = palette[i].blue = 42; - - png_set_PLTE(pp, pi, palette, npalette); - } - - if (do_tRNS) - { - int i, j; - png_byte tRNS[256]; - - /* Set all the entries, but skip trailing opaque entries */ - for (i=j=0; i<npalette; ++i) - if ((tRNS[i] = ppal[i].alpha) < 255) - j = i+1; - - /* Fill in the remainder with a detectable value: */ - for (; i<256; ++i) - tRNS[i] = 24; - -# ifdef PNG_WRITE_tRNS_SUPPORTED - if (j > 0) - png_set_tRNS(pp, pi, tRNS, j, 0/*color*/); -# endif - } -} - -/* The number of passes is related to the interlace type. There was no libpng - * API to determine this prior to 1.5, so we need an inquiry function: - */ -static int -npasses_from_interlace_type(png_const_structp pp, int interlace_type) -{ - switch (interlace_type) - { - default: - png_error(pp, "invalid interlace type"); - - case PNG_INTERLACE_NONE: - return 1; - - case PNG_INTERLACE_ADAM7: - return PNG_INTERLACE_ADAM7_PASSES; - } -} - -static unsigned int -bit_size(png_const_structp pp, png_byte colour_type, png_byte bit_depth) -{ - switch (colour_type) - { - default: png_error(pp, "invalid color type"); - - case 0: return bit_depth; - - case 2: return 3*bit_depth; - - case 3: return bit_depth; - - case 4: return 2*bit_depth; - - case 6: return 4*bit_depth; - } -} - -#define TRANSFORM_WIDTH 128U -#define TRANSFORM_ROWMAX (TRANSFORM_WIDTH*8U) -#define SIZE_ROWMAX (16*8U) /* 16 pixels, max 8 bytes each - 128 bytes */ -#define STANDARD_ROWMAX TRANSFORM_ROWMAX /* The larger of the two */ -#define SIZE_HEIGHTMAX 16 /* Maximum range of size images */ - -static size_t -transform_rowsize(png_const_structp pp, png_byte colour_type, - png_byte bit_depth) -{ - return (TRANSFORM_WIDTH * bit_size(pp, colour_type, bit_depth)) / 8; -} - -/* transform_width(pp, colour_type, bit_depth) current returns the same number - * every time, so just use a macro: - */ -#define transform_width(pp, colour_type, bit_depth) TRANSFORM_WIDTH - -static png_uint_32 -transform_height(png_const_structp pp, png_byte colour_type, png_byte bit_depth) -{ - switch (bit_size(pp, colour_type, bit_depth)) - { - case 1: - case 2: - case 4: - return 1; /* Total of 128 pixels */ - - case 8: - return 2; /* Total of 256 pixels/bytes */ - - case 16: - return 512; /* Total of 65536 pixels */ - - case 24: - case 32: - return 512; /* 65536 pixels */ - - case 48: - case 64: - return 2048;/* 4 x 65536 pixels. */ -# define TRANSFORM_HEIGHTMAX 2048 - - default: - return 0; /* Error, will be caught later */ - } -} - -#ifdef PNG_READ_SUPPORTED -/* The following can only be defined here, now we have the definitions - * of the transform image sizes. - */ -static png_uint_32 -standard_width(png_const_structp pp, png_uint_32 id) -{ - png_uint_32 width = WIDTH_FROM_ID(id); - UNUSED(pp) - - if (width == 0) - width = transform_width(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - - return width; -} - -static png_uint_32 -standard_height(png_const_structp pp, png_uint_32 id) -{ - png_uint_32 height = HEIGHT_FROM_ID(id); - - if (height == 0) - height = transform_height(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - - return height; -} - -static png_uint_32 -standard_rowsize(png_const_structp pp, png_uint_32 id) -{ - png_uint_32 width = standard_width(pp, id); - - /* This won't overflow: */ - width *= bit_size(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - return (width + 7) / 8; -} -#endif /* PNG_READ_SUPPORTED */ - -static void -transform_row(png_const_structp pp, png_byte buffer[TRANSFORM_ROWMAX], - png_byte colour_type, png_byte bit_depth, png_uint_32 y) -{ - png_uint_32 v = y << 7; - png_uint_32 i = 0; - - switch (bit_size(pp, colour_type, bit_depth)) - { - case 1: - while (i<128/8) buffer[i] = (png_byte)(v & 0xff), v += 17, ++i; - return; - - case 2: - while (i<128/4) buffer[i] = (png_byte)(v & 0xff), v += 33, ++i; - return; - - case 4: - while (i<128/2) buffer[i] = (png_byte)(v & 0xff), v += 65, ++i; - return; - - case 8: - /* 256 bytes total, 128 bytes in each row set as follows: */ - while (i<128) buffer[i] = (png_byte)(v & 0xff), ++v, ++i; - return; - - case 16: - /* Generate all 65536 pixel values in order, which includes the 8 bit - * GA case as well as the 16 bit G case. - */ - while (i<128) - { - buffer[2*i] = (png_byte)((v>>8) & 0xff); - buffer[2*i+1] = (png_byte)(v & 0xff); - ++v; - ++i; - } - - return; - - case 24: - /* 65535 pixels, but rotate the values. */ - while (i<128) - { - /* Three bytes per pixel, r, g, b, make b by r^g */ - buffer[3*i+0] = (png_byte)((v >> 8) & 0xff); - buffer[3*i+1] = (png_byte)(v & 0xff); - buffer[3*i+2] = (png_byte)(((v >> 8) ^ v) & 0xff); - ++v; - ++i; - } - - return; - - case 32: - /* 65535 pixels, r, g, b, a; just replicate */ - while (i<128) - { - buffer[4*i+0] = (png_byte)((v >> 8) & 0xff); - buffer[4*i+1] = (png_byte)(v & 0xff); - buffer[4*i+2] = (png_byte)((v >> 8) & 0xff); - buffer[4*i+3] = (png_byte)(v & 0xff); - ++v; - ++i; - } - - return; - - case 48: - /* y is maximum 2047, giving 4x65536 pixels, make 'r' increase by 1 at - * each pixel, g increase by 257 (0x101) and 'b' by 0x1111: - */ - while (i<128) - { - png_uint_32 t = v++; - buffer[6*i+0] = (png_byte)((t >> 8) & 0xff); - buffer[6*i+1] = (png_byte)(t & 0xff); - t *= 257; - buffer[6*i+2] = (png_byte)((t >> 8) & 0xff); - buffer[6*i+3] = (png_byte)(t & 0xff); - t *= 17; - buffer[6*i+4] = (png_byte)((t >> 8) & 0xff); - buffer[6*i+5] = (png_byte)(t & 0xff); - ++i; - } - - return; - - case 64: - /* As above in the 32 bit case. */ - while (i<128) - { - png_uint_32 t = v++; - buffer[8*i+0] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+1] = (png_byte)(t & 0xff); - buffer[8*i+4] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+5] = (png_byte)(t & 0xff); - t *= 257; - buffer[8*i+2] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+3] = (png_byte)(t & 0xff); - buffer[8*i+6] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+7] = (png_byte)(t & 0xff); - ++i; - } - return; - - default: - break; - } - - png_error(pp, "internal error"); -} - -/* This is just to do the right cast - could be changed to a function to check - * 'bd' but there isn't much point. - */ -#define DEPTH(bd) ((png_byte)(1U << (bd))) - -/* This is just a helper for compiling on minimal systems with no write - * interlacing support. If there is no write interlacing we can't generate test - * cases with interlace: - */ -#ifdef PNG_WRITE_INTERLACING_SUPPORTED -# define INTERLACE_LAST PNG_INTERLACE_LAST -# define check_interlace_type(type) ((void)(type)) -#else -# define INTERLACE_LAST (PNG_INTERLACE_NONE+1) -# define png_set_interlace_handling(a) (1) - -static void -check_interlace_type(int PNG_CONST interlace_type) -{ - if (interlace_type != PNG_INTERLACE_NONE) - { - /* This is an internal error - --interlace tests should be skipped, not - * attempted. - */ - fprintf(stderr, "pngvalid: no interlace support\n"); - exit(99); - } -} -#endif - -/* Make a standardized image given a an image colour type, bit depth and - * interlace type. The standard images have a very restricted range of - * rows and heights and are used for testing transforms rather than image - * layout details. See make_size_images below for a way to make images - * that test odd sizes along with the libpng interlace handling. - */ -static void -make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, - png_byte PNG_CONST bit_depth, unsigned int palette_number, - int interlace_type, png_const_charp name) -{ - context(ps, fault); - - check_interlace_type(interlace_type); - - Try - { - png_infop pi; - png_structp pp = set_store_for_write(ps, &pi, name); - png_uint_32 h; - - /* In the event of a problem return control to the Catch statement below - * to do the clean up - it is not possible to 'return' directly from a Try - * block. - */ - if (pp == NULL) - Throw ps; - - h = transform_height(pp, colour_type, bit_depth); - - png_set_IHDR(pp, pi, transform_width(pp, colour_type, bit_depth), h, - bit_depth, colour_type, interlace_type, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - -#ifdef PNG_TEXT_SUPPORTED -# if defined(PNG_READ_zTXt_SUPPORTED) && defined(PNG_WRITE_zTXt_SUPPORTED) -# define TEXT_COMPRESSION PNG_TEXT_COMPRESSION_zTXt -# else -# define TEXT_COMPRESSION PNG_TEXT_COMPRESSION_NONE -# endif - { - static char key[] = "image name"; /* must be writeable */ - size_t pos; - png_text text; - char copy[FILE_NAME_SIZE]; - - /* Use a compressed text string to test the correct interaction of text - * compression and IDAT compression. - */ - text.compression = TEXT_COMPRESSION; - text.key = key; - /* Yuck: the text must be writable! */ - pos = safecat(copy, sizeof copy, 0, ps->wname); - text.text = copy; - text.text_length = pos; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - if (colour_type == 3) /* palette */ - init_standard_palette(ps, pp, pi, 1U << bit_depth, 1/*do tRNS*/); - - png_write_info(pp, pi); - - if (png_get_rowbytes(pp, pi) != - transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "row size incorrect"); - - else - { - /* Somewhat confusingly this must be called *after* png_write_info - * because if it is called before, the information in *pp has not been - * updated to reflect the interlaced image. - */ - int npasses = png_set_interlace_handling(pp); - int pass; - - if (npasses != npasses_from_interlace_type(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - for (pass=0; pass<npasses; ++pass) - { - png_uint_32 y; - - for (y=0; y<h; ++y) - { - png_byte buffer[TRANSFORM_ROWMAX]; - - transform_row(pp, buffer, colour_type, bit_depth, y); - png_write_row(pp, buffer); - } - } - } - -#ifdef PNG_TEXT_SUPPORTED - { - static char key[] = "end marker"; - static char comment[] = "end"; - png_text text; - - /* Use a compressed text string to test the correct interaction of text - * compression and IDAT compression. - */ - text.compression = TEXT_COMPRESSION; - text.key = key; - text.text = comment; - text.text_length = (sizeof comment)-1; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - png_write_end(pp, pi); - - /* And store this under the appropriate id, then clean up. */ - store_storefile(ps, FILEID(colour_type, bit_depth, palette_number, - interlace_type, 0, 0, 0)); - - store_write_reset(ps); - } - - Catch(fault) - { - /* Use the png_store returned by the exception. This may help the compiler - * because 'ps' is not used in this branch of the setjmp. Note that fault - * and ps will always be the same value. - */ - store_write_reset(fault); - } -} - -static void -make_transform_images(png_store *ps) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - /* This is in case of errors. */ - safecat(ps->test, sizeof ps->test, 0, "make standard images"); - - /* Use next_format to enumerate all the combinations we test, including - * generating multiple low bit depth palette images. - */ - while (next_format(&colour_type, &bit_depth, &palette_number, 0)) - { - int interlace_type; - - for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < INTERLACE_LAST; ++interlace_type) - { - char name[FILE_NAME_SIZE]; - - standard_name(name, sizeof name, 0, colour_type, bit_depth, - palette_number, interlace_type, 0, 0, 0); - make_transform_image(ps, colour_type, bit_depth, palette_number, - interlace_type, name); - } - } -} - -/* The following two routines use the PNG interlace support macros from - * png.h to interlace or deinterlace rows. - */ -static void -interlace_row(png_bytep buffer, png_const_bytep imageRow, - unsigned int pixel_size, png_uint_32 w, int pass) -{ - png_uint_32 xin, xout, xstep; - - /* Note that this can, trivially, be optimized to a memcpy on pass 7, the - * code is presented this way to make it easier to understand. In practice - * consult the code in the libpng source to see other ways of doing this. - */ - xin = PNG_PASS_START_COL(pass); - xstep = 1U<<PNG_PASS_COL_SHIFT(pass); - - for (xout=0; xin<w; xin+=xstep) - { - pixel_copy(buffer, xout, imageRow, xin, pixel_size); - ++xout; - } -} - -#ifdef PNG_READ_SUPPORTED -static void -deinterlace_row(png_bytep buffer, png_const_bytep row, - unsigned int pixel_size, png_uint_32 w, int pass) -{ - /* The inverse of the above, 'row' is part of row 'y' of the output image, - * in 'buffer'. The image is 'w' wide and this is pass 'pass', distribute - * the pixels of row into buffer and return the number written (to allow - * this to be checked). - */ - png_uint_32 xin, xout, xstep; - - xout = PNG_PASS_START_COL(pass); - xstep = 1U<<PNG_PASS_COL_SHIFT(pass); - - for (xin=0; xout<w; xout+=xstep) - { - pixel_copy(buffer, xout, row, xin, pixel_size); - ++xin; - } -} -#endif /* PNG_READ_SUPPORTED */ - -/* Build a single row for the 'size' test images; this fills in only the - * first bit_width bits of the sample row. - */ -static void -size_row(png_byte buffer[SIZE_ROWMAX], png_uint_32 bit_width, png_uint_32 y) -{ - /* height is in the range 1 to 16, so: */ - y = ((y & 1) << 7) + ((y & 2) << 6) + ((y & 4) << 5) + ((y & 8) << 4); - /* the following ensures bits are set in small images: */ - y ^= 0xA5; - - while (bit_width >= 8) - *buffer++ = (png_byte)y++, bit_width -= 8; - - /* There may be up to 7 remaining bits, these go in the most significant - * bits of the byte. - */ - if (bit_width > 0) - { - png_uint_32 mask = (1U<<(8-bit_width))-1; - *buffer = (png_byte)((*buffer & mask) | (y & ~mask)); - } -} - -static void -make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, - png_byte PNG_CONST bit_depth, int PNG_CONST interlace_type, - png_uint_32 PNG_CONST w, png_uint_32 PNG_CONST h, - int PNG_CONST do_interlace) -{ - context(ps, fault); - - /* At present libpng does not support the write of an interlaced image unless - * PNG_WRITE_INTERLACING_SUPPORTED, even with do_interlace so the code here - * does the pixel interlace itself, so: - */ - check_interlace_type(interlace_type); - - Try - { - png_infop pi; - png_structp pp; - unsigned int pixel_size; - - /* Make a name and get an appropriate id for the store: */ - char name[FILE_NAME_SIZE]; - PNG_CONST png_uint_32 id = FILEID(colour_type, bit_depth, 0/*palette*/, - interlace_type, w, h, do_interlace); - - standard_name_from_id(name, sizeof name, 0, id); - pp = set_store_for_write(ps, &pi, name); - - /* In the event of a problem return control to the Catch statement below - * to do the clean up - it is not possible to 'return' directly from a Try - * block. - */ - if (pp == NULL) - Throw ps; - - png_set_IHDR(pp, pi, w, h, bit_depth, colour_type, interlace_type, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - -#ifdef PNG_TEXT_SUPPORTED - { - static char key[] = "image name"; /* must be writeable */ - size_t pos; - png_text text; - char copy[FILE_NAME_SIZE]; - - /* Use a compressed text string to test the correct interaction of text - * compression and IDAT compression. - */ - text.compression = TEXT_COMPRESSION; - text.key = key; - /* Yuck: the text must be writable! */ - pos = safecat(copy, sizeof copy, 0, ps->wname); - text.text = copy; - text.text_length = pos; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - if (colour_type == 3) /* palette */ - init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); - - png_write_info(pp, pi); - - /* Calculate the bit size, divide by 8 to get the byte size - this won't - * overflow because we know the w values are all small enough even for - * a system where 'unsigned int' is only 16 bits. - */ - pixel_size = bit_size(pp, colour_type, bit_depth); - if (png_get_rowbytes(pp, pi) != ((w * pixel_size) + 7) / 8) - png_error(pp, "row size incorrect"); - - else - { - int npasses = npasses_from_interlace_type(pp, interlace_type); - png_uint_32 y; - int pass; -# ifdef PNG_WRITE_FILTER_SUPPORTED - int nfilter = PNG_FILTER_VALUE_LAST; -# endif - png_byte image[16][SIZE_ROWMAX]; - - /* To help consistent error detection make the parts of this buffer - * that aren't set below all '1': - */ - memset(image, 0xff, sizeof image); - - if (!do_interlace && npasses != png_set_interlace_handling(pp)) - png_error(pp, "write: png_set_interlace_handling failed"); - - /* Prepare the whole image first to avoid making it 7 times: */ - for (y=0; y<h; ++y) - size_row(image[y], w * pixel_size, y); - - for (pass=0; pass<npasses; ++pass) - { - /* The following two are for checking the macros: */ - PNG_CONST png_uint_32 wPass = PNG_PASS_COLS(w, pass); - - /* If do_interlace is set we don't call png_write_row for every - * row because some of them are empty. In fact, for a 1x1 image, - * most of them are empty! - */ - for (y=0; y<h; ++y) - { - png_const_bytep row = image[y]; - png_byte tempRow[SIZE_ROWMAX]; - - /* If do_interlace *and* the image is interlaced we - * need a reduced interlace row; this may be reduced - * to empty. - */ - if (do_interlace && interlace_type == PNG_INTERLACE_ADAM7) - { - /* The row must not be written if it doesn't exist, notice - * that there are two conditions here, either the row isn't - * ever in the pass or the row would be but isn't wide - * enough to contribute any pixels. In fact the wPass test - * can be used to skip the whole y loop in this case. - */ - if (PNG_ROW_IN_INTERLACE_PASS(y, pass) && wPass > 0) - { - /* Set to all 1's for error detection (libpng tends to - * set unset things to 0). - */ - memset(tempRow, 0xff, sizeof tempRow); - interlace_row(tempRow, row, pixel_size, w, pass); - row = tempRow; - } - else - continue; - } - -# ifdef PNG_WRITE_FILTER_SUPPORTED - /* Only get to here if the row has some pixels in it, set the - * filters to 'all' for the very first row and thereafter to a - * single filter. It isn't well documented, but png_set_filter - * does accept a filter number (per the spec) as well as a bit - * mask. - * - * The apparent wackiness of decrementing nfilter rather than - * incrementing is so that Paeth gets used in all images bigger - * than 1 row - it's the tricky one. - */ - png_set_filter(pp, 0/*method*/, - nfilter >= PNG_FILTER_VALUE_LAST ? PNG_ALL_FILTERS : nfilter); - - if (nfilter-- == 0) - nfilter = PNG_FILTER_VALUE_LAST-1; -# endif - - png_write_row(pp, row); - } - } - } - -#ifdef PNG_TEXT_SUPPORTED - { - static char key[] = "end marker"; - static char comment[] = "end"; - png_text text; - - /* Use a compressed text string to test the correct interaction of text - * compression and IDAT compression. - */ - text.compression = TEXT_COMPRESSION; - text.key = key; - text.text = comment; - text.text_length = (sizeof comment)-1; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - png_write_end(pp, pi); - - /* And store this under the appropriate id, then clean up. */ - store_storefile(ps, id); - - store_write_reset(ps); - } - - Catch(fault) - { - /* Use the png_store returned by the exception. This may help the compiler - * because 'ps' is not used in this branch of the setjmp. Note that fault - * and ps will always be the same value. - */ - store_write_reset(fault); - } -} - -static void -make_size(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, int bdlo, - int PNG_CONST bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - png_uint_32 width; - - for (width = 1; width <= 16; ++width) - { - png_uint_32 height; - - for (height = 1; height <= 16; ++height) - { - /* The four combinations of DIY interlace and interlace or not - - * no interlace + DIY should be identical to no interlace with - * libpng doing it. - */ - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, - width, height, 0); - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, - width, height, 1); -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, - width, height, 0); - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, - width, height, 1); -# endif - } - } - } -} - -static void -make_size_images(png_store *ps) -{ - /* This is in case of errors. */ - safecat(ps->test, sizeof ps->test, 0, "make size images"); - - /* Arguments are colour_type, low bit depth, high bit depth - */ - make_size(ps, 0, 0, WRITE_BDHI); - make_size(ps, 2, 3, WRITE_BDHI); - make_size(ps, 3, 0, 3 /*palette: max 8 bits*/); - make_size(ps, 4, 3, WRITE_BDHI); - make_size(ps, 6, 3, WRITE_BDHI); -} - -#ifdef PNG_READ_SUPPORTED -/* Return a row based on image id and 'y' for checking: */ -static void -standard_row(png_const_structp pp, png_byte std[STANDARD_ROWMAX], - png_uint_32 id, png_uint_32 y) -{ - if (WIDTH_FROM_ID(id) == 0) - transform_row(pp, std, COL_FROM_ID(id), DEPTH_FROM_ID(id), y); - else - size_row(std, WIDTH_FROM_ID(id) * bit_size(pp, COL_FROM_ID(id), - DEPTH_FROM_ID(id)), y); -} -#endif /* PNG_READ_SUPPORTED */ - -/* Tests - individual test cases */ -/* Like 'make_standard' but errors are deliberately introduced into the calls - * to ensure that they get detected - it should not be possible to write an - * invalid image with libpng! - */ -/* TODO: the 'set' functions can probably all be made to take a - * png_const_structp rather than a modifiable one. - */ -#ifdef PNG_WARNINGS_SUPPORTED -static void -sBIT0_error_fn(png_structp pp, png_infop pi) -{ - /* 0 is invalid... */ - png_color_8 bad; - bad.red = bad.green = bad.blue = bad.gray = bad.alpha = 0; - png_set_sBIT(pp, pi, &bad); -} - -static void -sBIT_error_fn(png_structp pp, png_infop pi) -{ - png_byte bit_depth; - png_color_8 bad; - - if (png_get_color_type(pp, pi) == PNG_COLOR_TYPE_PALETTE) - bit_depth = 8; - - else - bit_depth = png_get_bit_depth(pp, pi); - - /* Now we know the bit depth we can easily generate an invalid sBIT entry */ - bad.red = bad.green = bad.blue = bad.gray = bad.alpha = - (png_byte)(bit_depth+1); - png_set_sBIT(pp, pi, &bad); -} - -static PNG_CONST struct -{ - void (*fn)(png_structp, png_infop); - PNG_CONST char *msg; - unsigned int warning :1; /* the error is a warning... */ -} error_test[] = - { - /* no warnings makes these errors undetectable. */ - { sBIT0_error_fn, "sBIT(0): failed to detect error", 1 }, - { sBIT_error_fn, "sBIT(too big): failed to detect error", 1 }, - }; - -static void -make_error(png_store* volatile psIn, png_byte PNG_CONST colour_type, - png_byte bit_depth, int interlace_type, int test, png_const_charp name) -{ - png_store * volatile ps = psIn; - - context(ps, fault); - - check_interlace_type(interlace_type); - - Try - { - png_structp pp; - png_infop pi; - - pp = set_store_for_write(ps, &pi, name); - - if (pp == NULL) - Throw ps; - - png_set_IHDR(pp, pi, transform_width(pp, colour_type, bit_depth), - transform_height(pp, colour_type, bit_depth), bit_depth, colour_type, - interlace_type, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - if (colour_type == 3) /* palette */ - init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); - - /* Time for a few errors; these are in various optional chunks, the - * standard tests test the standard chunks pretty well. - */ -# define exception__prev exception_prev_1 -# define exception__env exception_env_1 - Try - { - /* Expect this to throw: */ - ps->expect_error = !error_test[test].warning; - ps->expect_warning = error_test[test].warning; - ps->saw_warning = 0; - error_test[test].fn(pp, pi); - - /* Normally the error is only detected here: */ - png_write_info(pp, pi); - - /* And handle the case where it was only a warning: */ - if (ps->expect_warning && ps->saw_warning) - Throw ps; - - /* If we get here there is a problem, we have success - no error or - * no warning - when we shouldn't have success. Log an error. - */ - store_log(ps, pp, error_test[test].msg, 1 /*error*/); - } - - Catch (fault) - ps = fault; /* expected exit, make sure ps is not clobbered */ -#undef exception__prev -#undef exception__env - - /* And clear these flags */ - ps->expect_error = 0; - ps->expect_warning = 0; - - /* Now write the whole image, just to make sure that the detected, or - * undetected, errro has not created problems inside libpng. - */ - if (png_get_rowbytes(pp, pi) != - transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "row size incorrect"); - - else - { - png_uint_32 h = transform_height(pp, colour_type, bit_depth); - int npasses = png_set_interlace_handling(pp); - int pass; - - if (npasses != npasses_from_interlace_type(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - for (pass=0; pass<npasses; ++pass) - { - png_uint_32 y; - - for (y=0; y<h; ++y) - { - png_byte buffer[TRANSFORM_ROWMAX]; - - transform_row(pp, buffer, colour_type, bit_depth, y); - png_write_row(pp, buffer); - } - } - } - - png_write_end(pp, pi); - - /* The following deletes the file that was just written. */ - store_write_reset(ps); - } - - Catch(fault) - { - store_write_reset(fault); - } -} - -static int -make_errors(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - int interlace_type; - - for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < INTERLACE_LAST; ++interlace_type) - { - unsigned int test; - char name[FILE_NAME_SIZE]; - - standard_name(name, sizeof name, 0, colour_type, 1<<bdlo, 0, - interlace_type, 0, 0, 0); - - for (test=0; test<ARRAY_SIZE(error_test); ++test) - { - make_error(&pm->this, colour_type, DEPTH(bdlo), interlace_type, - test, name); - - if (fail(pm)) - return 0; - } - } - } - - return 1; /* keep going */ -} -#endif /* PNG_WARNINGS_SUPPORTED */ - -static void -perform_error_test(png_modifier *pm) -{ -#ifdef PNG_WARNINGS_SUPPORTED /* else there are no cases that work! */ - /* Need to do this here because we just write in this test. */ - safecat(pm->this.test, sizeof pm->this.test, 0, "error test"); - - if (!make_errors(pm, 0, 0, WRITE_BDHI)) - return; - - if (!make_errors(pm, 2, 3, WRITE_BDHI)) - return; - - if (!make_errors(pm, 3, 0, 3)) - return; - - if (!make_errors(pm, 4, 3, WRITE_BDHI)) - return; - - if (!make_errors(pm, 6, 3, WRITE_BDHI)) - return; -#else - UNUSED(pm) -#endif -} - -/* This is just to validate the internal PNG formatting code - if this fails - * then the warning messages the library outputs will probably be garbage. - */ -static void -perform_formatting_test(png_store *volatile ps) -{ -#ifdef PNG_TIME_RFC1123_SUPPORTED - /* The handle into the formatting code is the RFC1123 support; this test does - * nothing if that is compiled out. - */ - context(ps, fault); - - Try - { - png_const_charp correct = "29 Aug 2079 13:53:60 +0000"; - png_const_charp result; -# if PNG_LIBPNG_VER >= 10600 - char timestring[29]; -# endif - png_structp pp; - png_time pt; - - pp = set_store_for_write(ps, NULL, "libpng formatting test"); - - if (pp == NULL) - Throw ps; - - - /* Arbitrary settings: */ - pt.year = 2079; - pt.month = 8; - pt.day = 29; - pt.hour = 13; - pt.minute = 53; - pt.second = 60; /* a leap second */ - -# if PNG_LIBPNG_VER < 10600 - result = png_convert_to_rfc1123(pp, &pt); -# else - if (png_convert_to_rfc1123_buffer(timestring, &pt)) - result = timestring; - - else - result = NULL; -# endif - - if (result == NULL) - png_error(pp, "png_convert_to_rfc1123 failed"); - - if (strcmp(result, correct) != 0) - { - size_t pos = 0; - char msg[128]; - - pos = safecat(msg, sizeof msg, pos, "png_convert_to_rfc1123("); - pos = safecat(msg, sizeof msg, pos, correct); - pos = safecat(msg, sizeof msg, pos, ") returned: '"); - pos = safecat(msg, sizeof msg, pos, result); - pos = safecat(msg, sizeof msg, pos, "'"); - - png_error(pp, msg); - } - - store_write_reset(ps); - } - - Catch(fault) - { - store_write_reset(fault); - } -#else - UNUSED(ps) -#endif -} - -#ifdef PNG_READ_SUPPORTED -/* Because we want to use the same code in both the progressive reader and the - * sequential reader it is necessary to deal with the fact that the progressive - * reader callbacks only have one parameter (png_get_progressive_ptr()), so this - * must contain all the test parameters and all the local variables directly - * accessible to the sequential reader implementation. - * - * The technique adopted is to reinvent part of what Dijkstra termed a - * 'display'; an array of pointers to the stack frames of enclosing functions so - * that a nested function definition can access the local (C auto) variables of - * the functions that contain its definition. In fact C provides the first - * pointer (the local variables - the stack frame pointer) and the last (the - * global variables - the BCPL global vector typically implemented as global - * addresses), this code requires one more pointer to make the display - the - * local variables (and function call parameters) of the function that actually - * invokes either the progressive or sequential reader. - * - * Perhaps confusingly this technique is confounded with classes - the - * 'standard_display' defined here is sub-classed as the 'gamma_display' below. - * A gamma_display is a standard_display, taking advantage of the ANSI-C - * requirement that the pointer to the first member of a structure must be the - * same as the pointer to the structure. This allows us to reuse standard_ - * functions in the gamma test code; something that could not be done with - * nested functions! - */ -typedef struct standard_display -{ - png_store* ps; /* Test parameters (passed to the function) */ - png_byte colour_type; - png_byte bit_depth; - png_byte red_sBIT; /* Input data sBIT values. */ - png_byte green_sBIT; - png_byte blue_sBIT; - png_byte alpha_sBIT; - int interlace_type; - png_uint_32 id; /* Calculated file ID */ - png_uint_32 w; /* Width of image */ - png_uint_32 h; /* Height of image */ - int npasses; /* Number of interlaced passes */ - png_uint_32 pixel_size; /* Width of one pixel in bits */ - png_uint_32 bit_width; /* Width of output row in bits */ - size_t cbRow; /* Bytes in a row of the output image */ - int do_interlace; /* Do interlacing internally */ - int is_transparent; /* Transparency information was present. */ - int speed; /* Doing a speed test */ - int use_update_info;/* Call update_info, not start_image */ - struct - { - png_uint_16 red; - png_uint_16 green; - png_uint_16 blue; - } transparent; /* The transparent color, if set. */ - int npalette; /* Number of entries in the palette. */ - store_palette - palette; -} standard_display; - -static void -standard_display_init(standard_display *dp, png_store* ps, png_uint_32 id, - int do_interlace, int use_update_info) -{ - memset(dp, 0, sizeof *dp); - - dp->ps = ps; - dp->colour_type = COL_FROM_ID(id); - dp->bit_depth = DEPTH_FROM_ID(id); - if (dp->bit_depth < 1 || dp->bit_depth > 16) - internal_error(ps, "internal: bad bit depth"); - if (dp->colour_type == 3) - dp->red_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = 8; - else - dp->red_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = - dp->bit_depth; - dp->interlace_type = INTERLACE_FROM_ID(id); - check_interlace_type(dp->interlace_type); - dp->id = id; - /* All the rest are filled in after the read_info: */ - dp->w = 0; - dp->h = 0; - dp->npasses = 0; - dp->pixel_size = 0; - dp->bit_width = 0; - dp->cbRow = 0; - dp->do_interlace = do_interlace; - dp->is_transparent = 0; - dp->speed = ps->speed; - dp->use_update_info = use_update_info; - dp->npalette = 0; - /* Preset the transparent color to black: */ - memset(&dp->transparent, 0, sizeof dp->transparent); - /* Preset the palette to full intensity/opaque througout: */ - memset(dp->palette, 0xff, sizeof dp->palette); -} - -/* Initialize the palette fields - this must be done later because the palette - * comes from the particular png_store_file that is selected. - */ -static void -standard_palette_init(standard_display *dp) -{ - store_palette_entry *palette = store_current_palette(dp->ps, &dp->npalette); - - /* The remaining entries remain white/opaque. */ - if (dp->npalette > 0) - { - int i = dp->npalette; - memcpy(dp->palette, palette, i * sizeof *palette); - - /* Check for a non-opaque palette entry: */ - while (--i >= 0) - if (palette[i].alpha < 255) - break; - -# ifdef __GNUC__ - /* GCC can't handle the more obviously optimizable version. */ - if (i >= 0) - dp->is_transparent = 1; - else - dp->is_transparent = 0; -# else - dp->is_transparent = (i >= 0); -# endif - } -} - -/* Utility to read the palette from the PNG file and convert it into - * store_palette format. This returns 1 if there is any transparency in the - * palette (it does not check for a transparent colour in the non-palette case.) - */ -static int -read_palette(store_palette palette, int *npalette, png_const_structp pp, - png_infop pi) -{ - png_colorp pal; - png_bytep trans_alpha; - int num; - - pal = 0; - *npalette = -1; - - if (png_get_PLTE(pp, pi, &pal, npalette) & PNG_INFO_PLTE) - { - int i = *npalette; - - if (i <= 0 || i > 256) - png_error(pp, "validate: invalid PLTE count"); - - while (--i >= 0) - { - palette[i].red = pal[i].red; - palette[i].green = pal[i].green; - palette[i].blue = pal[i].blue; - } - - /* Mark the remainder of the entries with a flag value (other than - * white/opaque which is the flag value stored above.) - */ - memset(palette + *npalette, 126, (256-*npalette) * sizeof *palette); - } - - else /* !png_get_PLTE */ - { - if (*npalette != (-1)) - png_error(pp, "validate: invalid PLTE result"); - /* But there is no palette, so record this: */ - *npalette = 0; - memset(palette, 113, sizeof (store_palette)); - } - - trans_alpha = 0; - num = 2; /* force error below */ - if ((png_get_tRNS(pp, pi, &trans_alpha, &num, 0) & PNG_INFO_tRNS) != 0 && - (trans_alpha != NULL || num != 1/*returns 1 for a transparent color*/) && - /* Oops, if a palette tRNS gets expanded png_read_update_info (at least so - * far as 1.5.4) does not remove the trans_alpha pointer, only num_trans, - * so in the above call we get a success, we get a pointer (who knows what - * to) and we get num_trans == 0: - */ - !(trans_alpha != NULL && num == 0)) /* TODO: fix this in libpng. */ - { - int i; - - /* Any of these are crash-worthy - given the implementation of - * png_get_tRNS up to 1.5 an app won't crash if it just checks the - * result above and fails to check that the variables it passed have - * actually been filled in! Note that if the app were to pass the - * last, png_color_16p, variable too it couldn't rely on this. - */ - if (trans_alpha == NULL || num <= 0 || num > 256 || num > *npalette) - png_error(pp, "validate: unexpected png_get_tRNS (palette) result"); - - for (i=0; i<num; ++i) - palette[i].alpha = trans_alpha[i]; - - for (num=*npalette; i<num; ++i) - palette[i].alpha = 255; - - for (; i<256; ++i) - palette[i].alpha = 33; /* flag value */ - - return 1; /* transparency */ - } - - else - { - /* No palette transparency - just set the alpha channel to opaque. */ - int i; - - for (i=0, num=*npalette; i<num; ++i) - palette[i].alpha = 255; - - for (; i<256; ++i) - palette[i].alpha = 55; /* flag value */ - - return 0; /* no transparency */ - } -} - -/* Utility to validate the palette if it should not have changed (the - * non-transform case). - */ -static void -standard_palette_validate(standard_display *dp, png_const_structp pp, - png_infop pi) -{ - int npalette; - store_palette palette; - - if (read_palette(palette, &npalette, pp, pi) != dp->is_transparent) - png_error(pp, "validate: palette transparency changed"); - - if (npalette != dp->npalette) - { - size_t pos = 0; - char msg[64]; - - pos = safecat(msg, sizeof msg, pos, "validate: palette size changed: "); - pos = safecatn(msg, sizeof msg, pos, dp->npalette); - pos = safecat(msg, sizeof msg, pos, " -> "); - pos = safecatn(msg, sizeof msg, pos, npalette); - png_error(pp, msg); - } - - { - int i = npalette; /* npalette is aliased */ - - while (--i >= 0) - if (palette[i].red != dp->palette[i].red || - palette[i].green != dp->palette[i].green || - palette[i].blue != dp->palette[i].blue || - palette[i].alpha != dp->palette[i].alpha) - png_error(pp, "validate: PLTE or tRNS chunk changed"); - } -} - -/* By passing a 'standard_display' the progressive callbacks can be used - * directly by the sequential code, the functions suffixed "_imp" are the - * implementations, the functions without the suffix are the callbacks. - * - * The code for the info callback is split into two because this callback calls - * png_read_update_info or png_start_read_image and what gets called depends on - * whether the info needs updating (we want to test both calls in pngvalid.) - */ -static void -standard_info_part1(standard_display *dp, png_structp pp, png_infop pi) -{ - if (png_get_bit_depth(pp, pi) != dp->bit_depth) - png_error(pp, "validate: bit depth changed"); - - if (png_get_color_type(pp, pi) != dp->colour_type) - png_error(pp, "validate: color type changed"); - - if (png_get_filter_type(pp, pi) != PNG_FILTER_TYPE_BASE) - png_error(pp, "validate: filter type changed"); - - if (png_get_interlace_type(pp, pi) != dp->interlace_type) - png_error(pp, "validate: interlacing changed"); - - if (png_get_compression_type(pp, pi) != PNG_COMPRESSION_TYPE_BASE) - png_error(pp, "validate: compression type changed"); - - dp->w = png_get_image_width(pp, pi); - - if (dp->w != standard_width(pp, dp->id)) - png_error(pp, "validate: image width changed"); - - dp->h = png_get_image_height(pp, pi); - - if (dp->h != standard_height(pp, dp->id)) - png_error(pp, "validate: image height changed"); - - /* Record (but don't check at present) the input sBIT according to the colour - * type information. - */ - { - png_color_8p sBIT = 0; - - if (png_get_sBIT(pp, pi, &sBIT) & PNG_INFO_sBIT) - { - int sBIT_invalid = 0; - - if (sBIT == 0) - png_error(pp, "validate: unexpected png_get_sBIT result"); - - if (dp->colour_type & PNG_COLOR_MASK_COLOR) - { - if (sBIT->red == 0 || sBIT->red > dp->bit_depth) - sBIT_invalid = 1; - else - dp->red_sBIT = sBIT->red; - - if (sBIT->green == 0 || sBIT->green > dp->bit_depth) - sBIT_invalid = 1; - else - dp->green_sBIT = sBIT->green; - - if (sBIT->blue == 0 || sBIT->blue > dp->bit_depth) - sBIT_invalid = 1; - else - dp->blue_sBIT = sBIT->blue; - } - - else /* !COLOR */ - { - if (sBIT->gray == 0 || sBIT->gray > dp->bit_depth) - sBIT_invalid = 1; - else - dp->blue_sBIT = dp->green_sBIT = dp->red_sBIT = sBIT->gray; - } - - /* All 8 bits in tRNS for a palette image are significant - see the - * spec. - */ - if (dp->colour_type & PNG_COLOR_MASK_ALPHA) - { - if (sBIT->alpha == 0 || sBIT->alpha > dp->bit_depth) - sBIT_invalid = 1; - else - dp->alpha_sBIT = sBIT->alpha; - } - - if (sBIT_invalid) - png_error(pp, "validate: sBIT value out of range"); - } - } - - /* Important: this is validating the value *before* any transforms have been - * put in place. It doesn't matter for the standard tests, where there are - * no transforms, but it does for other tests where rowbytes may change after - * png_read_update_info. - */ - if (png_get_rowbytes(pp, pi) != standard_rowsize(pp, dp->id)) - png_error(pp, "validate: row size changed"); - - /* Validate the colour type 3 palette (this can be present on other color - * types.) - */ - standard_palette_validate(dp, pp, pi); - - /* In any case always check for a tranparent color (notice that the - * colour type 3 case must not give a successful return on the get_tRNS call - * with these arguments!) - */ - { - png_color_16p trans_color = 0; - - if (png_get_tRNS(pp, pi, 0, 0, &trans_color) & PNG_INFO_tRNS) - { - if (trans_color == 0) - png_error(pp, "validate: unexpected png_get_tRNS (color) result"); - - switch (dp->colour_type) - { - case 0: - dp->transparent.red = dp->transparent.green = dp->transparent.blue = - trans_color->gray; - dp->is_transparent = 1; - break; - - case 2: - dp->transparent.red = trans_color->red; - dp->transparent.green = trans_color->green; - dp->transparent.blue = trans_color->blue; - dp->is_transparent = 1; - break; - - case 3: - /* Not expected because it should result in the array case - * above. - */ - png_error(pp, "validate: unexpected png_get_tRNS result"); - break; - - default: - png_error(pp, "validate: invalid tRNS chunk with alpha image"); - } - } - } - - /* Read the number of passes - expected to match the value used when - * creating the image (interlaced or not). This has the side effect of - * turning on interlace handling (if do_interlace is not set.) - */ - dp->npasses = npasses_from_interlace_type(pp, dp->interlace_type); - if (!dp->do_interlace && dp->npasses != png_set_interlace_handling(pp)) - png_error(pp, "validate: file changed interlace type"); - - /* Caller calls png_read_update_info or png_start_read_image now, then calls - * part2. - */ -} - -/* This must be called *after* the png_read_update_info call to get the correct - * 'rowbytes' value, otherwise png_get_rowbytes will refer to the untransformed - * image. - */ -static void -standard_info_part2(standard_display *dp, png_const_structp pp, - png_const_infop pi, int nImages) -{ - /* Record cbRow now that it can be found. */ - dp->pixel_size = bit_size(pp, png_get_color_type(pp, pi), - png_get_bit_depth(pp, pi)); - dp->bit_width = png_get_image_width(pp, pi) * dp->pixel_size; - dp->cbRow = png_get_rowbytes(pp, pi); - - /* Validate the rowbytes here again. */ - if (dp->cbRow != (dp->bit_width+7)/8) - png_error(pp, "bad png_get_rowbytes calculation"); - - /* Then ensure there is enough space for the output image(s). */ - store_ensure_image(dp->ps, pp, nImages, dp->cbRow, dp->h); -} - -static void -standard_info_imp(standard_display *dp, png_structp pp, png_infop pi, - int nImages) -{ - /* Note that the validation routine has the side effect of turning on - * interlace handling in the subsequent code. - */ - standard_info_part1(dp, pp, pi); - - /* And the info callback has to call this (or png_read_update_info - see - * below in the png_modifier code for that variant. - */ - if (dp->use_update_info) - { - /* For debugging the effect of multiple calls: */ - int i = dp->use_update_info; - while (i-- > 0) - png_read_update_info(pp, pi); - } - - else - png_start_read_image(pp); - - /* Validate the height, width and rowbytes plus ensure that sufficient buffer - * exists for decoding the image. - */ - standard_info_part2(dp, pp, pi, nImages); -} - -static void PNGCBAPI -standard_info(png_structp pp, png_infop pi) -{ - standard_display *dp = voidcast(standard_display*, - png_get_progressive_ptr(pp)); - - /* Call with nImages==1 because the progressive reader can only produce one - * image. - */ - standard_info_imp(dp, pp, pi, 1 /*only one image*/); -} - -static void PNGCBAPI -progressive_row(png_structp ppIn, png_bytep new_row, png_uint_32 y, int pass) -{ - png_const_structp pp = ppIn; - PNG_CONST standard_display *dp = voidcast(standard_display*, - png_get_progressive_ptr(pp)); - - /* When handling interlacing some rows will be absent in each pass, the - * callback still gets called, but with a NULL pointer. This is checked - * in the 'else' clause below. We need our own 'cbRow', but we can't call - * png_get_rowbytes because we got no info structure. - */ - if (new_row != NULL) - { - png_bytep row; - - /* In the case where the reader doesn't do the interlace it gives - * us the y in the sub-image: - */ - if (dp->do_interlace && dp->interlace_type == PNG_INTERLACE_ADAM7) - { -#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED - /* Use this opportunity to validate the png 'current' APIs: */ - if (y != png_get_current_row_number(pp)) - png_error(pp, "png_get_current_row_number is broken"); - - if (pass != png_get_current_pass_number(pp)) - png_error(pp, "png_get_current_pass_number is broken"); -#endif - - y = PNG_ROW_FROM_PASS_ROW(y, pass); - } - - /* Validate this just in case. */ - if (y >= dp->h) - png_error(pp, "invalid y to progressive row callback"); - - row = store_image_row(dp->ps, pp, 0, y); - -#ifdef PNG_READ_INTERLACING_SUPPORTED - /* Combine the new row into the old: */ - if (dp->do_interlace) - { - if (dp->interlace_type == PNG_INTERLACE_ADAM7) - deinterlace_row(row, new_row, dp->pixel_size, dp->w, pass); - else - row_copy(row, new_row, dp->pixel_size * dp->w); - } - else - png_progressive_combine_row(pp, row, new_row); -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - } - -#ifdef PNG_READ_INTERLACING_SUPPORTED - else if (dp->interlace_type == PNG_INTERLACE_ADAM7 && - PNG_ROW_IN_INTERLACE_PASS(y, pass) && - PNG_PASS_COLS(dp->w, pass) > 0) - png_error(pp, "missing row in progressive de-interlacing"); -#endif /* PNG_READ_INTERLACING_SUPPORTED */ -} - -static void -sequential_row(standard_display *dp, png_structp pp, png_infop pi, - PNG_CONST int iImage, PNG_CONST int iDisplay) -{ - PNG_CONST int npasses = dp->npasses; - PNG_CONST int do_interlace = dp->do_interlace && - dp->interlace_type == PNG_INTERLACE_ADAM7; - PNG_CONST png_uint_32 height = standard_height(pp, dp->id); - PNG_CONST png_uint_32 width = standard_width(pp, dp->id); - PNG_CONST png_store* ps = dp->ps; - int pass; - - for (pass=0; pass<npasses; ++pass) - { - png_uint_32 y; - png_uint_32 wPass = PNG_PASS_COLS(width, pass); - - for (y=0; y<height; ++y) - { - if (do_interlace) - { - /* wPass may be zero or this row may not be in this pass. - * png_read_row must not be called in either case. - */ - if (wPass > 0 && PNG_ROW_IN_INTERLACE_PASS(y, pass)) - { - /* Read the row into a pair of temporary buffers, then do the - * merge here into the output rows. - */ - png_byte row[STANDARD_ROWMAX], display[STANDARD_ROWMAX]; - - /* The following aids (to some extent) error detection - we can - * see where png_read_row wrote. Use opposite values in row and - * display to make this easier. Don't use 0xff (which is used in - * the image write code to fill unused bits) or 0 (which is a - * likely value to overwrite unused bits with). - */ - memset(row, 0xc5, sizeof row); - memset(display, 0x5c, sizeof display); - - png_read_row(pp, row, display); - - if (iImage >= 0) - deinterlace_row(store_image_row(ps, pp, iImage, y), row, - dp->pixel_size, dp->w, pass); - - if (iDisplay >= 0) - deinterlace_row(store_image_row(ps, pp, iDisplay, y), display, - dp->pixel_size, dp->w, pass); - } - } - else - png_read_row(pp, - iImage >= 0 ? store_image_row(ps, pp, iImage, y) : NULL, - iDisplay >= 0 ? store_image_row(ps, pp, iDisplay, y) : NULL); - } - } - - /* And finish the read operation (only really necessary if the caller wants - * to find additional data in png_info from chunks after the last IDAT.) - */ - png_read_end(pp, pi); -} - -#ifdef PNG_TEXT_SUPPORTED -static void -standard_check_text(png_const_structp pp, png_const_textp tp, - png_const_charp keyword, png_const_charp text) -{ - char msg[1024]; - size_t pos = safecat(msg, sizeof msg, 0, "text: "); - size_t ok; - - pos = safecat(msg, sizeof msg, pos, keyword); - pos = safecat(msg, sizeof msg, pos, ": "); - ok = pos; - - if (tp->compression != TEXT_COMPRESSION) - { - char buf[64]; - - sprintf(buf, "compression [%d->%d], ", TEXT_COMPRESSION, - tp->compression); - pos = safecat(msg, sizeof msg, pos, buf); - } - - if (tp->key == NULL || strcmp(tp->key, keyword) != 0) - { - pos = safecat(msg, sizeof msg, pos, "keyword \""); - if (tp->key != NULL) - { - pos = safecat(msg, sizeof msg, pos, tp->key); - pos = safecat(msg, sizeof msg, pos, "\", "); - } - - else - pos = safecat(msg, sizeof msg, pos, "null, "); - } - - if (tp->text == NULL) - pos = safecat(msg, sizeof msg, pos, "text lost, "); - - else - { - if (tp->text_length != strlen(text)) - { - char buf[64]; - sprintf(buf, "text length changed[%lu->%lu], ", - (unsigned long)strlen(text), (unsigned long)tp->text_length); - pos = safecat(msg, sizeof msg, pos, buf); - } - - if (strcmp(tp->text, text) != 0) - { - pos = safecat(msg, sizeof msg, pos, "text becomes \""); - pos = safecat(msg, sizeof msg, pos, tp->text); - pos = safecat(msg, sizeof msg, pos, "\" (was \""); - pos = safecat(msg, sizeof msg, pos, text); - pos = safecat(msg, sizeof msg, pos, "\"), "); - } - } - - if (tp->itxt_length != 0) - pos = safecat(msg, sizeof msg, pos, "iTXt length set, "); - - if (tp->lang != NULL) - { - pos = safecat(msg, sizeof msg, pos, "iTXt language \""); - pos = safecat(msg, sizeof msg, pos, tp->lang); - pos = safecat(msg, sizeof msg, pos, "\", "); - } - - if (tp->lang_key != NULL) - { - pos = safecat(msg, sizeof msg, pos, "iTXt keyword \""); - pos = safecat(msg, sizeof msg, pos, tp->lang_key); - pos = safecat(msg, sizeof msg, pos, "\", "); - } - - if (pos > ok) - { - msg[pos-2] = '\0'; /* Remove the ", " at the end */ - png_error(pp, msg); - } -} - -static void -standard_text_validate(standard_display *dp, png_const_structp pp, - png_infop pi, int check_end) -{ - png_textp tp = NULL; - png_uint_32 num_text = png_get_text(pp, pi, &tp, NULL); - - if (num_text == 2 && tp != NULL) - { - standard_check_text(pp, tp, "image name", dp->ps->current->name); - - /* This exists because prior to 1.5.18 the progressive reader left the - * png_struct z_stream unreset at the end of the image, so subsequent - * attempts to use it simply returns Z_STREAM_END. - */ - if (check_end) - standard_check_text(pp, tp+1, "end marker", "end"); - } - - else - { - char msg[64]; - - sprintf(msg, "expected two text items, got %lu", - (unsigned long)num_text); - png_error(pp, msg); - } -} -#else -# define standard_text_validate(dp,pp,pi,check_end) ((void)0) -#endif - -static void -standard_row_validate(standard_display *dp, png_const_structp pp, - int iImage, int iDisplay, png_uint_32 y) -{ - int where; - png_byte std[STANDARD_ROWMAX]; - - /* The row must be pre-initialized to the magic number here for the size - * tests to pass: - */ - memset(std, 178, sizeof std); - standard_row(pp, std, dp->id, y); - - /* At the end both the 'row' and 'display' arrays should end up identical. - * In earlier passes 'row' will be partially filled in, with only the pixels - * that have been read so far, but 'display' will have those pixels - * replicated to fill the unread pixels while reading an interlaced image. -#if PNG_LIBPNG_VER < 10506 - * The side effect inside the libpng sequential reader is that the 'row' - * array retains the correct values for unwritten pixels within the row - * bytes, while the 'display' array gets bits off the end of the image (in - * the last byte) trashed. Unfortunately in the progressive reader the - * row bytes are always trashed, so we always do a pixel_cmp here even though - * a memcmp of all cbRow bytes will succeed for the sequential reader. -#endif - */ - if (iImage >= 0 && - (where = pixel_cmp(std, store_image_row(dp->ps, pp, iImage, y), - dp->bit_width)) != 0) - { - char msg[64]; - sprintf(msg, "PNG image row[%lu][%d] changed from %.2x to %.2x", - (unsigned long)y, where-1, std[where-1], - store_image_row(dp->ps, pp, iImage, y)[where-1]); - png_error(pp, msg); - } - -#if PNG_LIBPNG_VER < 10506 - /* In this case use pixel_cmp because we need to compare a partial - * byte at the end of the row if the row is not an exact multiple - * of 8 bits wide. (This is fixed in libpng-1.5.6 and pixel_cmp is - * changed to match!) - */ -#endif - if (iDisplay >= 0 && - (where = pixel_cmp(std, store_image_row(dp->ps, pp, iDisplay, y), - dp->bit_width)) != 0) - { - char msg[64]; - sprintf(msg, "display row[%lu][%d] changed from %.2x to %.2x", - (unsigned long)y, where-1, std[where-1], - store_image_row(dp->ps, pp, iDisplay, y)[where-1]); - png_error(pp, msg); - } -} - -static void -standard_image_validate(standard_display *dp, png_const_structp pp, int iImage, - int iDisplay) -{ - png_uint_32 y; - - if (iImage >= 0) - store_image_check(dp->ps, pp, iImage); - - if (iDisplay >= 0) - store_image_check(dp->ps, pp, iDisplay); - - for (y=0; y<dp->h; ++y) - standard_row_validate(dp, pp, iImage, iDisplay, y); - - /* This avoids false positives if the validation code is never called! */ - dp->ps->validated = 1; -} - -static void PNGCBAPI -standard_end(png_structp ppIn, png_infop pi) -{ - png_const_structp pp = ppIn; - standard_display *dp = voidcast(standard_display*, - png_get_progressive_ptr(pp)); - - UNUSED(pi) - - /* Validate the image - progressive reading only produces one variant for - * interlaced images. - */ - standard_text_validate(dp, pp, pi, - PNG_LIBPNG_VER >= 10518/*check_end: see comments above*/); - standard_image_validate(dp, pp, 0, -1); -} - -/* A single test run checking the standard image to ensure it is not damaged. */ -static void -standard_test(png_store* PNG_CONST psIn, png_uint_32 PNG_CONST id, - int do_interlace, int use_update_info) -{ - standard_display d; - context(psIn, fault); - - /* Set up the display (stack frame) variables from the arguments to the - * function and initialize the locals that are filled in later. - */ - standard_display_init(&d, psIn, id, do_interlace, use_update_info); - - /* Everything is protected by a Try/Catch. The functions called also - * typically have local Try/Catch blocks. - */ - Try - { - png_structp pp; - png_infop pi; - - /* Get a png_struct for reading the image. This will throw an error if it - * fails, so we don't need to check the result. - */ - pp = set_store_for_read(d.ps, &pi, d.id, - d.do_interlace ? (d.ps->progressive ? - "pngvalid progressive deinterlacer" : - "pngvalid sequential deinterlacer") : (d.ps->progressive ? - "progressive reader" : "sequential reader")); - - /* Initialize the palette correctly from the png_store_file. */ - standard_palette_init(&d); - - /* Introduce the correct read function. */ - if (d.ps->progressive) - { - png_set_progressive_read_fn(pp, &d, standard_info, progressive_row, - standard_end); - - /* Now feed data into the reader until we reach the end: */ - store_progressive_read(d.ps, pp, pi); - } - else - { - /* Note that this takes the store, not the display. */ - png_set_read_fn(pp, d.ps, store_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* The code tests both versions of the images that the sequential - * reader can produce. - */ - standard_info_imp(&d, pp, pi, 2 /*images*/); - - /* Need the total bytes in the image below; we can't get to this point - * unless the PNG file values have been checked against the expected - * values. - */ - { - sequential_row(&d, pp, pi, 0, 1); - - /* After the last pass loop over the rows again to check that the - * image is correct. - */ - if (!d.speed) - { - standard_text_validate(&d, pp, pi, 1/*check_end*/); - standard_image_validate(&d, pp, 0, 1); - } - else - d.ps->validated = 1; - } - } - - /* Check for validation. */ - if (!d.ps->validated) - png_error(pp, "image read failed silently"); - - /* Successful completion. */ - } - - Catch(fault) - d.ps = fault; /* make sure this hasn't been clobbered. */ - - /* In either case clean up the store. */ - store_read_reset(d.ps); -} - -static int -test_standard(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - int interlace_type; - - for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < INTERLACE_LAST; ++interlace_type) - { - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - interlace_type, 0, 0, 0), 0/*do_interlace*/, pm->use_update_info); - - if (fail(pm)) - return 0; - } - } - - return 1; /* keep going */ -} - -static void -perform_standard_test(png_modifier *pm) -{ - /* Test each colour type over the valid range of bit depths (expressed as - * log2(bit_depth) in turn, stop as soon as any error is detected. - */ - if (!test_standard(pm, 0, 0, READ_BDHI)) - return; - - if (!test_standard(pm, 2, 3, READ_BDHI)) - return; - - if (!test_standard(pm, 3, 0, 3)) - return; - - if (!test_standard(pm, 4, 3, READ_BDHI)) - return; - - if (!test_standard(pm, 6, 3, READ_BDHI)) - return; -} - - -/********************************** SIZE TESTS ********************************/ -static int -test_size(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) -{ - /* Run the tests on each combination. - * - * NOTE: on my 32 bit x86 each of the following blocks takes - * a total of 3.5 seconds if done across every combo of bit depth - * width and height. This is a waste of time in practice, hence the - * hinc and winc stuff: - */ - static PNG_CONST png_byte hinc[] = {1, 3, 11, 1, 5}; - static PNG_CONST png_byte winc[] = {1, 9, 5, 7, 1}; - for (; bdlo <= bdhi; ++bdlo) - { - png_uint_32 h, w; - - for (h=1; h<=16; h+=hinc[bdlo]) for (w=1; w<=16; w+=winc[bdlo]) - { - /* First test all the 'size' images against the sequential - * reader using libpng to deinterlace (where required.) This - * validates the write side of libpng. There are four possibilities - * to validate. - */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_NONE, w, h, 0), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_NONE, w, h, 1), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 0), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 1), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; -# endif - - /* Now validate the interlaced read side - do_interlace true, - * in the progressive case this does actually make a difference - * to the code used in the non-interlaced case too. - */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_NONE, w, h, 0), 1/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 0), 1/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; -# endif - } - } - - return 1; /* keep going */ -} - -static void -perform_size_test(png_modifier *pm) -{ - /* Test each colour type over the valid range of bit depths (expressed as - * log2(bit_depth) in turn, stop as soon as any error is detected. - */ - if (!test_size(pm, 0, 0, READ_BDHI)) - return; - - if (!test_size(pm, 2, 3, READ_BDHI)) - return; - - /* For the moment don't do the palette test - it's a waste of time when - * compared to the grayscale test. - */ -#if 0 - if (!test_size(pm, 3, 0, 3)) - return; -#endif - - if (!test_size(pm, 4, 3, READ_BDHI)) - return; - - if (!test_size(pm, 6, 3, READ_BDHI)) - return; -} - - -/******************************* TRANSFORM TESTS ******************************/ -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -/* A set of tests to validate libpng image transforms. The possibilities here - * are legion because the transforms can be combined in a combinatorial - * fashion. To deal with this some measure of restraint is required, otherwise - * the tests would take forever. - */ -typedef struct image_pixel -{ - /* A local (pngvalid) representation of a PNG pixel, in all its - * various forms. - */ - unsigned int red, green, blue, alpha; /* For non-palette images. */ - unsigned int palette_index; /* For a palette image. */ - png_byte colour_type; /* As in the spec. */ - png_byte bit_depth; /* Defines bit size in row */ - png_byte sample_depth; /* Scale of samples */ - int have_tRNS; /* tRNS chunk may need processing */ - - /* For checking the code calculates double precision floating point values - * along with an error value, accumulated from the transforms. Because an - * sBIT setting allows larger error bounds (indeed, by the spec, apparently - * up to just less than +/-1 in the scaled value) the *lowest* sBIT for each - * channel is stored. This sBIT value is folded in to the stored error value - * at the end of the application of the transforms to the pixel. - */ - double redf, greenf, bluef, alphaf; - double rede, greene, bluee, alphae; - png_byte red_sBIT, green_sBIT, blue_sBIT, alpha_sBIT; -} image_pixel; - -/* Shared utility function, see below. */ -static void -image_pixel_setf(image_pixel *this, unsigned int max) -{ - this->redf = this->red / (double)max; - this->greenf = this->green / (double)max; - this->bluef = this->blue / (double)max; - this->alphaf = this->alpha / (double)max; - - if (this->red < max) - this->rede = this->redf * DBL_EPSILON; - else - this->rede = 0; - if (this->green < max) - this->greene = this->greenf * DBL_EPSILON; - else - this->greene = 0; - if (this->blue < max) - this->bluee = this->bluef * DBL_EPSILON; - else - this->bluee = 0; - if (this->alpha < max) - this->alphae = this->alphaf * DBL_EPSILON; - else - this->alphae = 0; -} - -/* Initialize the structure for the next pixel - call this before doing any - * transforms and call it for each pixel since all the fields may need to be - * reset. - */ -static void -image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, - png_byte bit_depth, png_uint_32 x, store_palette palette) -{ - PNG_CONST png_byte sample_depth = (png_byte)(colour_type == - PNG_COLOR_TYPE_PALETTE ? 8 : bit_depth); - PNG_CONST unsigned int max = (1U<<sample_depth)-1; - - /* Initially just set everything to the same number and the alpha to opaque. - * Note that this currently assumes a simple palette where entry x has colour - * rgb(x,x,x)! - */ - this->palette_index = this->red = this->green = this->blue = - sample(row, colour_type, bit_depth, x, 0); - this->alpha = max; - this->red_sBIT = this->green_sBIT = this->blue_sBIT = this->alpha_sBIT = - sample_depth; - - /* Then override as appropriate: */ - if (colour_type == 3) /* palette */ - { - /* This permits the caller to default to the sample value. */ - if (palette != 0) - { - PNG_CONST unsigned int i = this->palette_index; - - this->red = palette[i].red; - this->green = palette[i].green; - this->blue = palette[i].blue; - this->alpha = palette[i].alpha; - } - } - - else /* not palette */ - { - unsigned int i = 0; - - if (colour_type & 2) - { - this->green = sample(row, colour_type, bit_depth, x, 1); - this->blue = sample(row, colour_type, bit_depth, x, 2); - i = 2; - } - if (colour_type & 4) - this->alpha = sample(row, colour_type, bit_depth, x, ++i); - } - - /* Calculate the scaled values, these are simply the values divided by - * 'max' and the error is initialized to the double precision epsilon value - * from the header file. - */ - image_pixel_setf(this, max); - - /* Store the input information for use in the transforms - these will - * modify the information. - */ - this->colour_type = colour_type; - this->bit_depth = bit_depth; - this->sample_depth = sample_depth; - this->have_tRNS = 0; -} - -/* Convert a palette image to an rgb image. This necessarily converts the tRNS - * chunk at the same time, because the tRNS will be in palette form. The way - * palette validation works means that the original palette is never updated, - * instead the image_pixel value from the row contains the RGB of the - * corresponding palette entry and *this* is updated. Consequently this routine - * only needs to change the colour type information. - */ -static void -image_pixel_convert_PLTE(image_pixel *this) -{ - if (this->colour_type == PNG_COLOR_TYPE_PALETTE) - { - if (this->have_tRNS) - { - this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - this->have_tRNS = 0; - } - else - this->colour_type = PNG_COLOR_TYPE_RGB; - - /* The bit depth of the row changes at this point too (notice that this is - * the row format, not the sample depth, which is separate.) - */ - this->bit_depth = 8; - } -} - -/* Add an alpha channel; this will import the tRNS information because tRNS is - * not valid in an alpha image. The bit depth will invariably be set to at - * least 8. Palette images will be converted to alpha (using the above API). - */ -static void -image_pixel_add_alpha(image_pixel *this, PNG_CONST standard_display *display) -{ - if (this->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(this); - - if ((this->colour_type & PNG_COLOR_MASK_ALPHA) == 0) - { - if (this->colour_type == PNG_COLOR_TYPE_GRAY) - { - if (this->bit_depth < 8) - this->bit_depth = 8; - - if (this->have_tRNS) - { - this->have_tRNS = 0; - - /* Check the input, original, channel value here against the - * original tRNS gray chunk valie. - */ - if (this->red == display->transparent.red) - this->alphaf = 0; - else - this->alphaf = 1; - } - else - this->alphaf = 1; - - this->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; - } - - else if (this->colour_type == PNG_COLOR_TYPE_RGB) - { - if (this->have_tRNS) - { - this->have_tRNS = 0; - - /* Again, check the exact input values, not the current transformed - * value! - */ - if (this->red == display->transparent.red && - this->green == display->transparent.green && - this->blue == display->transparent.blue) - this->alphaf = 0; - else - this->alphaf = 1; - - this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - } - } - - /* The error in the alpha is zero and the sBIT value comes from the - * original sBIT data (actually it will always be the original bit depth). - */ - this->alphae = 0; - this->alpha_sBIT = display->alpha_sBIT; - } -} - -struct transform_display; -typedef struct image_transform -{ - /* The name of this transform: a string. */ - PNG_CONST char *name; - - /* Each transform can be disabled from the command line: */ - int enable; - - /* The global list of transforms; read only. */ - struct image_transform *PNG_CONST list; - - /* The global count of the number of times this transform has been set on an - * image. - */ - unsigned int global_use; - - /* The local count of the number of times this transform has been set. */ - unsigned int local_use; - - /* The next transform in the list, each transform must call its own next - * transform after it has processed the pixel successfully. - */ - PNG_CONST struct image_transform *next; - - /* A single transform for the image, expressed as a series of function - * callbacks and some space for values. - * - * First a callback to add any required modifications to the png_modifier; - * this gets called just before the modifier is set up for read. - */ - void (*ini)(PNG_CONST struct image_transform *this, - struct transform_display *that); - - /* And a callback to set the transform on the current png_read_struct: - */ - void (*set)(PNG_CONST struct image_transform *this, - struct transform_display *that, png_structp pp, png_infop pi); - - /* Then a transform that takes an input pixel in one PNG format or another - * and modifies it by a pngvalid implementation of the transform (thus - * duplicating the libpng intent without, we hope, duplicating the bugs - * in the libpng implementation!) The png_structp is solely to allow error - * reporting via png_error and png_warning. - */ - void (*mod)(PNG_CONST struct image_transform *this, image_pixel *that, - png_const_structp pp, PNG_CONST struct transform_display *display); - - /* Add this transform to the list and return true if the transform is - * meaningful for this colour type and bit depth - if false then the - * transform should have no effect on the image so there's not a lot of - * point running it. - */ - int (*add)(struct image_transform *this, - PNG_CONST struct image_transform **that, png_byte colour_type, - png_byte bit_depth); -} image_transform; - -typedef struct transform_display -{ - standard_display this; - - /* Parameters */ - png_modifier* pm; - PNG_CONST image_transform* transform_list; - - /* Local variables */ - png_byte output_colour_type; - png_byte output_bit_depth; - - /* Modifications (not necessarily used.) */ - gama_modification gama_mod; - chrm_modification chrm_mod; - srgb_modification srgb_mod; -} transform_display; - -/* Set sRGB, cHRM and gAMA transforms as required by the current encoding. */ -static void -transform_set_encoding(transform_display *this) -{ - /* Set up the png_modifier '_current' fields then use these to determine how - * to add appropriate chunks. - */ - png_modifier *pm = this->pm; - - modifier_set_encoding(pm); - - if (modifier_color_encoding_is_set(pm)) - { - if (modifier_color_encoding_is_sRGB(pm)) - srgb_modification_init(&this->srgb_mod, pm, PNG_sRGB_INTENT_ABSOLUTE); - - else - { - /* Set gAMA and cHRM separately. */ - gama_modification_init(&this->gama_mod, pm, pm->current_gamma); - - if (pm->current_encoding != 0) - chrm_modification_init(&this->chrm_mod, pm, pm->current_encoding); - } - } -} - -/* Three functions to end the list: */ -static void -image_transform_ini_end(PNG_CONST image_transform *this, - transform_display *that) -{ - UNUSED(this) - UNUSED(that) -} - -static void -image_transform_set_end(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - UNUSED(this) - UNUSED(that) - UNUSED(pp) - UNUSED(pi) -} - -/* At the end of the list recalculate the output image pixel value from the - * double precision values set up by the preceding 'mod' calls: - */ -static unsigned int -sample_scale(double sample_value, unsigned int scale) -{ - sample_value = floor(sample_value * scale + .5); - - /* Return NaN as 0: */ - if (!(sample_value > 0)) - sample_value = 0; - else if (sample_value > scale) - sample_value = scale; - - return (unsigned int)sample_value; -} - -static void -image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, - png_const_structp pp, PNG_CONST transform_display *display) -{ - PNG_CONST unsigned int scale = (1U<<that->sample_depth)-1; - - UNUSED(this) - UNUSED(pp) - UNUSED(display) - - /* At the end recalculate the digitized red green and blue values according - * to the current sample_depth of the pixel. - * - * The sample value is simply scaled to the maximum, checking for over - * and underflow (which can both happen for some image transforms, - * including simple size scaling, though libpng doesn't do that at present. - */ - that->red = sample_scale(that->redf, scale); - - /* The error value is increased, at the end, according to the lowest sBIT - * value seen. Common sense tells us that the intermediate integer - * representations are no more accurate than +/- 0.5 in the integral values, - * the sBIT allows the implementation to be worse than this. In addition the - * PNG specification actually permits any error within the range (-1..+1), - * but that is ignored here. Instead the final digitized value is compared, - * below to the digitized value of the error limits - this has the net effect - * of allowing (almost) +/-1 in the output value. It's difficult to see how - * any algorithm that digitizes intermediate results can be more accurate. - */ - that->rede += 1./(2*((1U<<that->red_sBIT)-1)); - - if (that->colour_type & PNG_COLOR_MASK_COLOR) - { - that->green = sample_scale(that->greenf, scale); - that->blue = sample_scale(that->bluef, scale); - that->greene += 1./(2*((1U<<that->green_sBIT)-1)); - that->bluee += 1./(2*((1U<<that->blue_sBIT)-1)); - } - else - { - that->blue = that->green = that->red; - that->bluef = that->greenf = that->redf; - that->bluee = that->greene = that->rede; - } - - if ((that->colour_type & PNG_COLOR_MASK_ALPHA) || - that->colour_type == PNG_COLOR_TYPE_PALETTE) - { - that->alpha = sample_scale(that->alphaf, scale); - that->alphae += 1./(2*((1U<<that->alpha_sBIT)-1)); - } - else - { - that->alpha = scale; /* opaque */ - that->alpha = 1; /* Override this. */ - that->alphae = 0; /* It's exact ;-) */ - } -} - -/* Static 'end' structure: */ -static image_transform image_transform_end = -{ - "(end)", /* name */ - 1, /* enable */ - 0, /* list */ - 0, /* global_use */ - 0, /* local_use */ - 0, /* next */ - image_transform_ini_end, - image_transform_set_end, - image_transform_mod_end, - 0 /* never called, I want it to crash if it is! */ -}; - -/* Reader callbacks and implementations, where they differ from the standard - * ones. - */ -static void -transform_display_init(transform_display *dp, png_modifier *pm, png_uint_32 id, - PNG_CONST image_transform *transform_list) -{ - memset(dp, 0, sizeof *dp); - - /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/, - pm->use_update_info); - - /* Parameter fields */ - dp->pm = pm; - dp->transform_list = transform_list; - - /* Local variable fields */ - dp->output_colour_type = 255; /* invalid */ - dp->output_bit_depth = 255; /* invalid */ -} - -static void -transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) -{ - /* Reuse the standard stuff as appropriate. */ - standard_info_part1(&dp->this, pp, pi); - - /* Now set the list of transforms. */ - dp->transform_list->set(dp->transform_list, dp, pp, pi); - - /* Update the info structure for these transforms: */ - { - int i = dp->this.use_update_info; - /* Always do one call, even if use_update_info is 0. */ - do - png_read_update_info(pp, pi); - while (--i > 0); - } - - /* And get the output information into the standard_display */ - standard_info_part2(&dp->this, pp, pi, 1/*images*/); - - /* Plus the extra stuff we need for the transform tests: */ - dp->output_colour_type = png_get_color_type(pp, pi); - dp->output_bit_depth = png_get_bit_depth(pp, pi); - - /* Validate the combination of colour type and bit depth that we are getting - * out of libpng; the semantics of something not in the PNG spec are, at - * best, unclear. - */ - switch (dp->output_colour_type) - { - case PNG_COLOR_TYPE_PALETTE: - if (dp->output_bit_depth > 8) goto error; - /*FALL THROUGH*/ - case PNG_COLOR_TYPE_GRAY: - if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 || - dp->output_bit_depth == 4) - break; - /*FALL THROUGH*/ - default: - if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16) - break; - /*FALL THROUGH*/ - error: - { - char message[128]; - size_t pos; - - pos = safecat(message, sizeof message, 0, - "invalid final bit depth: colour type("); - pos = safecatn(message, sizeof message, pos, dp->output_colour_type); - pos = safecat(message, sizeof message, pos, ") with bit depth: "); - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - - png_error(pp, message); - } - } - - /* Use a test pixel to check that the output agrees with what we expect - - * this avoids running the whole test if the output is unexpected. - */ - { - image_pixel test_pixel; - - memset(&test_pixel, 0, sizeof test_pixel); - test_pixel.colour_type = dp->this.colour_type; /* input */ - test_pixel.bit_depth = dp->this.bit_depth; - if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) - test_pixel.sample_depth = 8; - else - test_pixel.sample_depth = test_pixel.bit_depth; - /* Don't need sBIT here, but it must be set to non-zero to avoid - * arithmetic overflows. - */ - test_pixel.have_tRNS = dp->this.is_transparent; - test_pixel.red_sBIT = test_pixel.green_sBIT = test_pixel.blue_sBIT = - test_pixel.alpha_sBIT = test_pixel.sample_depth; - - dp->transform_list->mod(dp->transform_list, &test_pixel, pp, dp); - - if (test_pixel.colour_type != dp->output_colour_type) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, "colour type "); - - pos = safecatn(message, sizeof message, pos, dp->output_colour_type); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.colour_type); - - png_error(pp, message); - } - - if (test_pixel.bit_depth != dp->output_bit_depth) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, "bit depth "); - - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); - - png_error(pp, message); - } - - /* If both bit depth and colour type are correct check the sample depth. - * I believe these are both internal errors. - */ - if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) - { - if (test_pixel.sample_depth != 8) /* oops - internal error! */ - png_error(pp, "pngvalid: internal: palette sample depth not 8"); - } - else if (test_pixel.sample_depth != dp->output_bit_depth) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, - "internal: sample depth "); - - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.sample_depth); - - png_error(pp, message); - } - } -} - -static void PNGCBAPI -transform_info(png_structp pp, png_infop pi) -{ - transform_info_imp(voidcast(transform_display*, png_get_progressive_ptr(pp)), - pp, pi); -} - -static void -transform_range_check(png_const_structp pp, unsigned int r, unsigned int g, - unsigned int b, unsigned int a, unsigned int in_digitized, double in, - unsigned int out, png_byte sample_depth, double err, double limit, - PNG_CONST char *name, double digitization_error) -{ - /* Compare the scaled, digitzed, values of our local calculation (in+-err) - * with the digitized values libpng produced; 'sample_depth' is the actual - * digitization depth of the libpng output colors (the bit depth except for - * palette images where it is always 8.) The check on 'err' is to detect - * internal errors in pngvalid itself. - */ - unsigned int max = (1U<<sample_depth)-1; - double in_min = ceil((in-err)*max - digitization_error); - double in_max = floor((in+err)*max + digitization_error); - if (err > limit || !(out >= in_min && out <= in_max)) - { - char message[256]; - size_t pos; - - pos = safecat(message, sizeof message, 0, name); - pos = safecat(message, sizeof message, pos, " output value error: rgba("); - pos = safecatn(message, sizeof message, pos, r); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, g); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, b); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, a); - pos = safecat(message, sizeof message, pos, "): "); - pos = safecatn(message, sizeof message, pos, out); - pos = safecat(message, sizeof message, pos, " expected: "); - pos = safecatn(message, sizeof message, pos, in_digitized); - pos = safecat(message, sizeof message, pos, " ("); - pos = safecatd(message, sizeof message, pos, (in-err)*max, 3); - pos = safecat(message, sizeof message, pos, ".."); - pos = safecatd(message, sizeof message, pos, (in+err)*max, 3); - pos = safecat(message, sizeof message, pos, ")"); - - png_error(pp, message); - } -} - -static void -transform_image_validate(transform_display *dp, png_const_structp pp, - png_infop pi) -{ - /* Constants for the loop below: */ - PNG_CONST png_store* PNG_CONST ps = dp->this.ps; - PNG_CONST png_byte in_ct = dp->this.colour_type; - PNG_CONST png_byte in_bd = dp->this.bit_depth; - PNG_CONST png_uint_32 w = dp->this.w; - PNG_CONST png_uint_32 h = dp->this.h; - PNG_CONST png_byte out_ct = dp->output_colour_type; - PNG_CONST png_byte out_bd = dp->output_bit_depth; - PNG_CONST png_byte sample_depth = (png_byte)(out_ct == - PNG_COLOR_TYPE_PALETTE ? 8 : out_bd); - PNG_CONST png_byte red_sBIT = dp->this.red_sBIT; - PNG_CONST png_byte green_sBIT = dp->this.green_sBIT; - PNG_CONST png_byte blue_sBIT = dp->this.blue_sBIT; - PNG_CONST png_byte alpha_sBIT = dp->this.alpha_sBIT; - PNG_CONST int have_tRNS = dp->this.is_transparent; - double digitization_error; - - store_palette out_palette; - png_uint_32 y; - - UNUSED(pi) - - /* Check for row overwrite errors */ - store_image_check(dp->this.ps, pp, 0); - - /* Read the palette corresponding to the output if the output colour type - * indicates a palette, othewise set out_palette to garbage. - */ - if (out_ct == PNG_COLOR_TYPE_PALETTE) - { - /* Validate that the palette count itself has not changed - this is not - * expected. - */ - int npalette = (-1); - - (void)read_palette(out_palette, &npalette, pp, pi); - if (npalette != dp->this.npalette) - png_error(pp, "unexpected change in palette size"); - - digitization_error = .5; - } - else - { - png_byte in_sample_depth; - - memset(out_palette, 0x5e, sizeof out_palette); - - /* use-input-precision means assume that if the input has 8 bit (or less) - * samples and the output has 16 bit samples the calculations will be done - * with 8 bit precision, not 16. - */ - if (in_ct == PNG_COLOR_TYPE_PALETTE || in_bd < 16) - in_sample_depth = 8; - else - in_sample_depth = in_bd; - - if (sample_depth != 16 || in_sample_depth > 8 || - !dp->pm->calculations_use_input_precision) - digitization_error = .5; - - /* Else calculations are at 8 bit precision, and the output actually - * consists of scaled 8-bit values, so scale .5 in 8 bits to the 16 bits: - */ - else - digitization_error = .5 * 257; - } - - for (y=0; y<h; ++y) - { - png_const_bytep PNG_CONST pRow = store_image_row(ps, pp, 0, y); - png_uint_32 x; - - /* The original, standard, row pre-transforms. */ - png_byte std[STANDARD_ROWMAX]; - - transform_row(pp, std, in_ct, in_bd, y); - - /* Go through each original pixel transforming it and comparing with what - * libpng did to the same pixel. - */ - for (x=0; x<w; ++x) - { - image_pixel in_pixel, out_pixel; - unsigned int r, g, b, a; - - /* Find out what we think the pixel should be: */ - image_pixel_init(&in_pixel, std, in_ct, in_bd, x, dp->this.palette); - - in_pixel.red_sBIT = red_sBIT; - in_pixel.green_sBIT = green_sBIT; - in_pixel.blue_sBIT = blue_sBIT; - in_pixel.alpha_sBIT = alpha_sBIT; - in_pixel.have_tRNS = have_tRNS; - - /* For error detection, below. */ - r = in_pixel.red; - g = in_pixel.green; - b = in_pixel.blue; - a = in_pixel.alpha; - - dp->transform_list->mod(dp->transform_list, &in_pixel, pp, dp); - - /* Read the output pixel and compare it to what we got, we don't - * use the error field here, so no need to update sBIT. - */ - image_pixel_init(&out_pixel, pRow, out_ct, out_bd, x, out_palette); - - /* We don't expect changes to the index here even if the bit depth is - * changed. - */ - if (in_ct == PNG_COLOR_TYPE_PALETTE && - out_ct == PNG_COLOR_TYPE_PALETTE) - { - if (in_pixel.palette_index != out_pixel.palette_index) - png_error(pp, "unexpected transformed palette index"); - } - - /* Check the colours for palette images too - in fact the palette could - * be separately verified itself in most cases. - */ - if (in_pixel.red != out_pixel.red) - transform_range_check(pp, r, g, b, a, in_pixel.red, in_pixel.redf, - out_pixel.red, sample_depth, in_pixel.rede, - dp->pm->limit + 1./(2*((1U<<in_pixel.red_sBIT)-1)), "red/gray", - digitization_error); - - if ((out_ct & PNG_COLOR_MASK_COLOR) != 0 && - in_pixel.green != out_pixel.green) - transform_range_check(pp, r, g, b, a, in_pixel.green, - in_pixel.greenf, out_pixel.green, sample_depth, in_pixel.greene, - dp->pm->limit + 1./(2*((1U<<in_pixel.green_sBIT)-1)), "green", - digitization_error); - - if ((out_ct & PNG_COLOR_MASK_COLOR) != 0 && - in_pixel.blue != out_pixel.blue) - transform_range_check(pp, r, g, b, a, in_pixel.blue, in_pixel.bluef, - out_pixel.blue, sample_depth, in_pixel.bluee, - dp->pm->limit + 1./(2*((1U<<in_pixel.blue_sBIT)-1)), "blue", - digitization_error); - - if ((out_ct & PNG_COLOR_MASK_ALPHA) != 0 && - in_pixel.alpha != out_pixel.alpha) - transform_range_check(pp, r, g, b, a, in_pixel.alpha, - in_pixel.alphaf, out_pixel.alpha, sample_depth, in_pixel.alphae, - dp->pm->limit + 1./(2*((1U<<in_pixel.alpha_sBIT)-1)), "alpha", - digitization_error); - } /* pixel (x) loop */ - } /* row (y) loop */ - - /* Record that something was actually checked to avoid a false positive. */ - dp->this.ps->validated = 1; -} - -static void PNGCBAPI -transform_end(png_structp ppIn, png_infop pi) -{ - png_const_structp pp = ppIn; - transform_display *dp = voidcast(transform_display*, - png_get_progressive_ptr(pp)); - - if (!dp->this.speed) - transform_image_validate(dp, pp, pi); - else - dp->this.ps->validated = 1; -} - -/* A single test run. */ -static void -transform_test(png_modifier *pmIn, PNG_CONST png_uint_32 idIn, - PNG_CONST image_transform* transform_listIn, PNG_CONST char * volatile name) -{ - transform_display d; - context(&pmIn->this, fault); - - transform_display_init(&d, pmIn, idIn, transform_listIn); - - Try - { - size_t pos = 0; - png_structp pp; - png_infop pi; - char full_name[256]; - - /* Make sure the encoding fields are correct and enter the required - * modifications. - */ - transform_set_encoding(&d); - - /* Add any modifications required by the transform list. */ - d.transform_list->ini(d.transform_list, &d); - - /* Add the color space information, if any, to the name. */ - pos = safecat(full_name, sizeof full_name, pos, name); - pos = safecat_current_encoding(full_name, sizeof full_name, pos, d.pm); - - /* Get a png_struct for reading the image. */ - pp = set_modifier_for_read(d.pm, &pi, d.this.id, full_name); - standard_palette_init(&d.this); - -# if 0 - /* Logging (debugging only) */ - { - char buffer[256]; - - (void)store_message(&d.pm->this, pp, buffer, sizeof buffer, 0, - "running test"); - - fprintf(stderr, "%s\n", buffer); - } -# endif - - /* Introduce the correct read function. */ - if (d.pm->this.progressive) - { - /* Share the row function with the standard implementation. */ - png_set_progressive_read_fn(pp, &d, transform_info, progressive_row, - transform_end); - - /* Now feed data into the reader until we reach the end: */ - modifier_progressive_read(d.pm, pp, pi); - } - else - { - /* modifier_read expects a png_modifier* */ - png_set_read_fn(pp, d.pm, modifier_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* Process the 'info' requirements. Only one image is generated */ - transform_info_imp(&d, pp, pi); - - sequential_row(&d.this, pp, pi, -1, 0); - - if (!d.this.speed) - transform_image_validate(&d, pp, pi); - else - d.this.ps->validated = 1; - } - - modifier_reset(d.pm); - } - - Catch(fault) - { - modifier_reset(voidcast(png_modifier*,(void*)fault)); - } -} - -/* The transforms: */ -#define ITSTRUCT(name) image_transform_##name -#define ITDATA(name) image_transform_data_##name -#define image_transform_ini image_transform_default_ini -#define IT(name)\ -static image_transform ITSTRUCT(name) =\ -{\ - #name,\ - 1, /*enable*/\ - &PT, /*list*/\ - 0, /*global_use*/\ - 0, /*local_use*/\ - 0, /*next*/\ - image_transform_ini,\ - image_transform_png_set_##name##_set,\ - image_transform_png_set_##name##_mod,\ - image_transform_png_set_##name##_add\ -} -#define PT ITSTRUCT(end) /* stores the previous transform */ - -/* To save code: */ -static void -image_transform_default_ini(PNG_CONST image_transform *this, - transform_display *that) -{ - this->next->ini(this->next, that); -} - -#ifdef PNG_READ_BACKGROUND_SUPPORTED -static int -image_transform_default_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return 1; -} -#endif - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_palette_to_rgb */ -static void -image_transform_png_set_palette_to_rgb_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_palette_to_rgb(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_palette_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_palette_to_rgb_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return colour_type == PNG_COLOR_TYPE_PALETTE; -} - -IT(palette_to_rgb); -#undef PT -#define PT ITSTRUCT(palette_to_rgb) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_tRNS_to_alpha */ -static void -image_transform_png_set_tRNS_to_alpha_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_tRNS_to_alpha(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_tRNS_to_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - /* LIBPNG BUG: this always forces palette images to RGB. */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - - /* This effectively does an 'expand' only if there is some transparency to - * convert to an alpha channel. - */ - if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); - - /* LIBPNG BUG: otherwise libpng still expands to 8 bits! */ - else - { - if (that->bit_depth < 8) - that->bit_depth =8; - if (that->sample_depth < 8) - that->sample_depth = 8; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_tRNS_to_alpha_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* We don't know yet whether there will be a tRNS chunk, but we know that - * this transformation should do nothing if there already is an alpha - * channel. - */ - return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; -} - -IT(tRNS_to_alpha); -#undef PT -#define PT ITSTRUCT(tRNS_to_alpha) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED -/* png_set_gray_to_rgb */ -static void -image_transform_png_set_gray_to_rgb_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_gray_to_rgb(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_gray_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - /* NOTE: we can actually pend the tRNS processing at this point because we - * can correctly recognize the original pixel value even though we have - * mapped the one gray channel to the three RGB ones, but in fact libpng - * doesn't do this, so we don't either. - */ - if ((that->colour_type & PNG_COLOR_MASK_COLOR) == 0 && that->have_tRNS) - image_pixel_add_alpha(that, &display->this); - - /* Simply expand the bit depth and alter the colour type as required. */ - if (that->colour_type == PNG_COLOR_TYPE_GRAY) - { - /* RGB images have a bit depth at least equal to '8' */ - if (that->bit_depth < 8) - that->sample_depth = that->bit_depth = 8; - - /* And just changing the colour type works here because the green and blue - * channels are being maintained in lock-step with the red/gray: - */ - that->colour_type = PNG_COLOR_TYPE_RGB; - } - - else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_gray_to_rgb_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_COLOR) == 0; -} - -IT(gray_to_rgb); -#undef PT -#define PT ITSTRUCT(gray_to_rgb) -#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_expand */ -static void -image_transform_png_set_expand_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_expand(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - /* The general expand case depends on what the colour type is: */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - else if (that->bit_depth < 8) /* grayscale */ - that->sample_depth = that->bit_depth = 8; - - if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_expand_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* 'expand' should do nothing for RGBA or GA input - no tRNS and the bit - * depth is at least 8 already. - */ - return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; -} - -IT(expand); -#undef PT -#define PT ITSTRUCT(expand) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_expand_gray_1_2_4_to_8 - * LIBPNG BUG: this just does an 'expand' - */ -static void -image_transform_png_set_expand_gray_1_2_4_to_8_set( - PNG_CONST image_transform *this, transform_display *that, png_structp pp, - png_infop pi) -{ - png_set_expand_gray_1_2_4_to_8(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_gray_1_2_4_to_8_mod( - PNG_CONST image_transform *this, image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - image_transform_png_set_expand_mod(this, that, pp, display); -} - -static int -image_transform_png_set_expand_gray_1_2_4_to_8_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - return image_transform_png_set_expand_add(this, that, colour_type, - bit_depth); -} - -IT(expand_gray_1_2_4_to_8); -#undef PT -#define PT ITSTRUCT(expand_gray_1_2_4_to_8) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_16_SUPPORTED -/* png_set_expand_16 */ -static void -image_transform_png_set_expand_16_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_expand_16(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - /* Expect expand_16 to expand everything to 16 bits as a result of also - * causing 'expand' to happen. - */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - - if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); - - if (that->bit_depth < 16) - that->sample_depth = that->bit_depth = 16; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_expand_16_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - /* expand_16 does something unless the bit depth is already 16. */ - return bit_depth < 16; -} - -IT(expand_16); -#undef PT -#define PT ITSTRUCT(expand_16) -#endif /* PNG_READ_EXPAND_16_SUPPORTED */ - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* API added in 1.5.4 */ -/* png_set_scale_16 */ -static void -image_transform_png_set_scale_16_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_scale_16(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_scale_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - if (that->bit_depth == 16) - { - that->sample_depth = that->bit_depth = 8; - if (that->red_sBIT > 8) that->red_sBIT = 8; - if (that->green_sBIT > 8) that->green_sBIT = 8; - if (that->blue_sBIT > 8) that->blue_sBIT = 8; - if (that->alpha_sBIT > 8) that->alpha_sBIT = 8; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_scale_16_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - return bit_depth > 8; -} - -IT(scale_16); -#undef PT -#define PT ITSTRUCT(scale_16) -#endif /* PNG_READ_SCALE_16_TO_8_SUPPORTED (1.5.4 on) */ - -#ifdef PNG_READ_16_TO_8_SUPPORTED /* the default before 1.5.4 */ -/* png_set_strip_16 */ -static void -image_transform_png_set_strip_16_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_strip_16(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_strip_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - if (that->bit_depth == 16) - { - that->sample_depth = that->bit_depth = 8; - if (that->red_sBIT > 8) that->red_sBIT = 8; - if (that->green_sBIT > 8) that->green_sBIT = 8; - if (that->blue_sBIT > 8) that->blue_sBIT = 8; - if (that->alpha_sBIT > 8) that->alpha_sBIT = 8; - - /* Prior to 1.5.4 png_set_strip_16 would use an 'accurate' method if this - * configuration option is set. From 1.5.4 the flag is never set and the - * 'scale' API (above) must be used. - */ -# ifdef PNG_READ_ACCURATE_SCALE_SUPPORTED -# if PNG_LIBPNG_VER >= 10504 -# error PNG_READ_ACCURATE_SCALE should not be set -# endif - - /* The strip 16 algorithm drops the low 8 bits rather than calculating - * 1/257, so we need to adjust the permitted errors appropriately: - * Notice that this is only relevant prior to the addition of the - * png_set_scale_16 API in 1.5.4 (but 1.5.4+ always defines the above!) - */ - { - PNG_CONST double d = (255-128.5)/65535; - that->rede += d; - that->greene += d; - that->bluee += d; - that->alphae += d; - } -# endif - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_strip_16_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - return bit_depth > 8; -} - -IT(strip_16); -#undef PT -#define PT ITSTRUCT(strip_16) -#endif /* PNG_READ_16_TO_8_SUPPORTED */ - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED -/* png_set_strip_alpha */ -static void -image_transform_png_set_strip_alpha_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_strip_alpha(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_strip_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY; - else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB; - - that->have_tRNS = 0; - that->alphaf = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_strip_alpha_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_ALPHA) != 0; -} - -IT(strip_alpha); -#undef PT -#define PT ITSTRUCT(strip_alpha) -#endif /* PNG_READ_STRIP_ALPHA_SUPPORTED */ - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -/* png_set_rgb_to_gray(png_structp, int err_action, double red, double green) - * png_set_rgb_to_gray_fixed(png_structp, int err_action, png_fixed_point red, - * png_fixed_point green) - * png_get_rgb_to_gray_status - * - * The 'default' test here uses values known to be used inside libpng: - * - * red: 6968 - * green: 23434 - * blue: 2366 - * - * These values are being retained for compatibility, along with the somewhat - * broken truncation calculation in the fast-and-inaccurate code path. Older - * versions of libpng will fail the accuracy tests below because they use the - * truncation algorithm everywhere. - */ -#define data ITDATA(rgb_to_gray) -static struct -{ - double gamma; /* File gamma to use in processing */ - - /* The following are the parameters for png_set_rgb_to_gray: */ -# ifdef PNG_FLOATING_POINT_SUPPORTED - double red_to_set; - double green_to_set; -# else - png_fixed_point red_to_set; - png_fixed_point green_to_set; -# endif - - /* The actual coefficients: */ - double red_coefficient; - double green_coefficient; - double blue_coefficient; - - /* Set if the coeefficients have been overridden. */ - int coefficients_overridden; -} data; - -#undef image_transform_ini -#define image_transform_ini image_transform_png_set_rgb_to_gray_ini -static void -image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, - transform_display *that) -{ - png_modifier *pm = that->pm; - PNG_CONST color_encoding *e = pm->current_encoding; - - UNUSED(this) - - /* Since we check the encoding this flag must be set: */ - pm->test_uses_encoding = 1; - - /* If 'e' is not NULL chromaticity information is present and either a cHRM - * or an sRGB chunk will be inserted. - */ - if (e != 0) - { - /* Coefficients come from the encoding, but may need to be normalized to a - * white point Y of 1.0 - */ - PNG_CONST double whiteY = e->red.Y + e->green.Y + e->blue.Y; - - data.red_coefficient = e->red.Y; - data.green_coefficient = e->green.Y; - data.blue_coefficient = e->blue.Y; - - if (whiteY != 1) - { - data.red_coefficient /= whiteY; - data.green_coefficient /= whiteY; - data.blue_coefficient /= whiteY; - } - } - - else - { - /* The default (built in) coeffcients, as above: */ - data.red_coefficient = 6968 / 32768.; - data.green_coefficient = 23434 / 32768.; - data.blue_coefficient = 2366 / 32768.; - } - - data.gamma = pm->current_gamma; - - /* If not set then the calculations assume linear encoding (implicitly): */ - if (data.gamma == 0) - data.gamma = 1; - - /* The arguments to png_set_rgb_to_gray can override the coefficients implied - * by the color space encoding. If doing exhaustive checks do the override - * in each case, otherwise do it randomly. - */ - if (pm->test_exhaustive) - { - /* First time in coefficients_overridden is 0, the following sets it to 1, - * so repeat if it is set. If a test fails this may mean we subsequently - * skip a non-override test, ignore that. - */ - data.coefficients_overridden = !data.coefficients_overridden; - pm->repeat = data.coefficients_overridden != 0; - } - - else - data.coefficients_overridden = random_choice(); - - if (data.coefficients_overridden) - { - /* These values override the color encoding defaults, simply use random - * numbers. - */ - png_uint_32 ru; - double total; - - RANDOMIZE(ru); - data.green_coefficient = total = (ru & 0xffff) / 65535.; - ru >>= 16; - data.red_coefficient = (1 - total) * (ru & 0xffff) / 65535.; - total += data.red_coefficient; - data.blue_coefficient = 1 - total; - -# ifdef PNG_FLOATING_POINT_SUPPORTED - data.red_to_set = data.red_coefficient; - data.green_to_set = data.green_coefficient; -# else - data.red_to_set = fix(data.red_coefficient); - data.green_to_set = fix(data.green_coefficient); -# endif - - /* The following just changes the error messages: */ - pm->encoding_ignored = 1; - } - - else - { - data.red_to_set = -1; - data.green_to_set = -1; - } - - /* Adjust the error limit in the png_modifier because of the larger errors - * produced in the digitization during the gamma handling. - */ - if (data.gamma != 1) /* Use gamma tables */ - { - if (that->this.bit_depth == 16 || pm->assume_16_bit_calculations) - { - /* The computations have the form: - * - * r * rc + g * gc + b * bc - * - * Each component of which is +/-1/65535 from the gamma_to_1 table - * lookup, resulting in a base error of +/-6. The gamma_from_1 - * conversion adds another +/-2 in the 16-bit case and - * +/-(1<<(15-PNG_MAX_GAMMA_8)) in the 8-bit case. - */ - that->pm->limit += -# if PNG_MAX_GAMMA_8 < 14 - pow((that->this.bit_depth == 16 ? - 8. : 6. + (1<<(15-PNG_MAX_GAMMA_8)))/65535, data.gamma); -# else - pow((that->this.bit_depth == 16 ? - 8. : 8. + (1<<(15-PNG_MAX_GAMMA_8)))/65535, data.gamma); -# endif - } - - else - { - /* Rounding to 8 bits in the linear space causes massive errors which - * will trigger the error check in transform_range_check. Fix that - * here by taking the gamma encoding into account. - * - * When DIGITIZE is set because a pre-1.7 version of libpng is being - * tested allow a bigger slack. - * - * NOTE: this magic number was determined by experiment to be 1.1 (when - * using fixed point arithmetic). There's no great merit to the value - * below, however it only affects the limit used for checking for - * internal calculation errors, not the actual limit imposed by - * pngvalid on the output errors. - */ - that->pm->limit += -# if DIGITIZE - pow(1.1 /255, data.gamma); -# else - pow(1.0 /255, data.gamma); -# endif - } - } - - else - { - /* With no gamma correction a large error comes from the truncation of the - * calculation in the 8 bit case, allow for that here. - */ - if (that->this.bit_depth != 16 && !pm->assume_16_bit_calculations) - that->pm->limit += 4E-3; - } -} - -static void -image_transform_png_set_rgb_to_gray_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - PNG_CONST int error_action = 1; /* no error, no defines in png.h */ - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_rgb_to_gray(pp, error_action, data.red_to_set, data.green_to_set); -# else - png_set_rgb_to_gray_fixed(pp, error_action, data.red_to_set, - data.green_to_set); -# endif - -# ifdef PNG_READ_cHRM_SUPPORTED - if (that->pm->current_encoding != 0) - { - /* We have an encoding so a cHRM chunk may have been set; if so then - * check that the libpng APIs give the correct (X,Y,Z) values within - * some margin of error for the round trip through the chromaticity - * form. - */ -# ifdef PNG_FLOATING_POINT_SUPPORTED -# define API_function png_get_cHRM_XYZ -# define API_form "FP" -# define API_type double -# define API_cvt(x) (x) -# else -# define API_function png_get_cHRM_XYZ_fixed -# define API_form "fixed" -# define API_type png_fixed_point -# define API_cvt(x) ((double)(x)/PNG_FP_1) -# endif - - API_type rX, gX, bX; - API_type rY, gY, bY; - API_type rZ, gZ, bZ; - - if ((API_function(pp, pi, &rX, &rY, &rZ, &gX, &gY, &gZ, &bX, &bY, &bZ) - & PNG_INFO_cHRM) != 0) - { - double maxe; - PNG_CONST char *el; - color_encoding e, o; - - /* Expect libpng to return a normalized result, but the original - * color space encoding may not be normalized. - */ - modifier_current_encoding(that->pm, &o); - normalize_color_encoding(&o); - - /* Sanity check the pngvalid code - the coefficients should match - * the normalized Y values of the encoding unless they were - * overridden. - */ - if (data.red_to_set == -1 && data.green_to_set == -1 && - (fabs(o.red.Y - data.red_coefficient) > DBL_EPSILON || - fabs(o.green.Y - data.green_coefficient) > DBL_EPSILON || - fabs(o.blue.Y - data.blue_coefficient) > DBL_EPSILON)) - png_error(pp, "internal pngvalid cHRM coefficient error"); - - /* Generate a colour space encoding. */ - e.gamma = o.gamma; /* not used */ - e.red.X = API_cvt(rX); - e.red.Y = API_cvt(rY); - e.red.Z = API_cvt(rZ); - e.green.X = API_cvt(gX); - e.green.Y = API_cvt(gY); - e.green.Z = API_cvt(gZ); - e.blue.X = API_cvt(bX); - e.blue.Y = API_cvt(bY); - e.blue.Z = API_cvt(bZ); - - /* This should match the original one from the png_modifier, within - * the range permitted by the libpng fixed point representation. - */ - maxe = 0; - el = "-"; /* Set to element name with error */ - -# define CHECK(col,x)\ - {\ - double err = fabs(o.col.x - e.col.x);\ - if (err > maxe)\ - {\ - maxe = err;\ - el = #col "(" #x ")";\ - }\ - } - - CHECK(red,X) - CHECK(red,Y) - CHECK(red,Z) - CHECK(green,X) - CHECK(green,Y) - CHECK(green,Z) - CHECK(blue,X) - CHECK(blue,Y) - CHECK(blue,Z) - - /* Here in both fixed and floating cases to check the values read - * from the cHRm chunk. PNG uses fixed point in the cHRM chunk, so - * we can't expect better than +/-.5E-5 on the result, allow 1E-5. - */ - if (maxe >= 1E-5) - { - size_t pos = 0; - char buffer[256]; - - pos = safecat(buffer, sizeof buffer, pos, API_form); - pos = safecat(buffer, sizeof buffer, pos, " cHRM "); - pos = safecat(buffer, sizeof buffer, pos, el); - pos = safecat(buffer, sizeof buffer, pos, " error: "); - pos = safecatd(buffer, sizeof buffer, pos, maxe, 7); - pos = safecat(buffer, sizeof buffer, pos, " "); - /* Print the color space without the gamma value: */ - pos = safecat_color_encoding(buffer, sizeof buffer, pos, &o, 0); - pos = safecat(buffer, sizeof buffer, pos, " -> "); - pos = safecat_color_encoding(buffer, sizeof buffer, pos, &e, 0); - - png_error(pp, buffer); - } - } - } -# endif /* READ_cHRM */ - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - if ((that->colour_type & PNG_COLOR_MASK_COLOR) != 0) - { - double gray, err; - - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - - /* Image now has RGB channels... */ -# if DIGITIZE - { - PNG_CONST png_modifier *pm = display->pm; - const unsigned int sample_depth = that->sample_depth; - const unsigned int calc_depth = (pm->assume_16_bit_calculations ? 16 : - sample_depth); - const unsigned int gamma_depth = (sample_depth == 16 ? 16 : - (pm->assume_16_bit_calculations ? PNG_MAX_GAMMA_8 : sample_depth)); - int isgray; - double r, g, b; - double rlo, rhi, glo, ghi, blo, bhi, graylo, grayhi; - - /* Do this using interval arithmetic, otherwise it is too difficult to - * handle the errors correctly. - * - * To handle the gamma correction work out the upper and lower bounds - * of the digitized value. Assume rounding here - normally the values - * will be identical after this operation if there is only one - * transform, feel free to delete the png_error checks on this below in - * the future (this is just me trying to ensure it works!) - */ - r = rlo = rhi = that->redf; - rlo -= that->rede; - rlo = digitize(rlo, calc_depth, 1/*round*/); - rhi += that->rede; - rhi = digitize(rhi, calc_depth, 1/*round*/); - - g = glo = ghi = that->greenf; - glo -= that->greene; - glo = digitize(glo, calc_depth, 1/*round*/); - ghi += that->greene; - ghi = digitize(ghi, calc_depth, 1/*round*/); - - b = blo = bhi = that->bluef; - blo -= that->bluee; - blo = digitize(blo, calc_depth, 1/*round*/); - bhi += that->greene; - bhi = digitize(bhi, calc_depth, 1/*round*/); - - isgray = r==g && g==b; - - if (data.gamma != 1) - { - PNG_CONST double power = 1/data.gamma; - PNG_CONST double abse = calc_depth == 16 ? .5/65535 : .5/255; - - /* 'abse' is the absolute error permitted in linear calculations. It - * is used here to capture the error permitted in the handling - * (undoing) of the gamma encoding. Once again digitization occurs - * to handle the upper and lower bounds of the values. This is - * where the real errors are introduced. - */ - r = pow(r, power); - rlo = digitize(pow(rlo, power)-abse, calc_depth, 1); - rhi = digitize(pow(rhi, power)+abse, calc_depth, 1); - - g = pow(g, power); - glo = digitize(pow(glo, power)-abse, calc_depth, 1); - ghi = digitize(pow(ghi, power)+abse, calc_depth, 1); - - b = pow(b, power); - blo = digitize(pow(blo, power)-abse, calc_depth, 1); - bhi = digitize(pow(bhi, power)+abse, calc_depth, 1); - } - - /* Now calculate the actual gray values. Although the error in the - * coefficients depends on whether they were specified on the command - * line (in which case truncation to 15 bits happened) or not (rounding - * was used) the maxium error in an individual coefficient is always - * 1/32768, because even in the rounding case the requirement that - * coefficients add up to 32768 can cause a larger rounding error. - * - * The only time when rounding doesn't occur in 1.5.5 and later is when - * the non-gamma code path is used for less than 16 bit data. - */ - gray = r * data.red_coefficient + g * data.green_coefficient + - b * data.blue_coefficient; - - { - PNG_CONST int do_round = data.gamma != 1 || calc_depth == 16; - PNG_CONST double ce = 1. / 32768; - - graylo = digitize(rlo * (data.red_coefficient-ce) + - glo * (data.green_coefficient-ce) + - blo * (data.blue_coefficient-ce), gamma_depth, do_round); - if (graylo <= 0) - graylo = 0; - - grayhi = digitize(rhi * (data.red_coefficient+ce) + - ghi * (data.green_coefficient+ce) + - bhi * (data.blue_coefficient+ce), gamma_depth, do_round); - if (grayhi >= 1) - grayhi = 1; - } - - /* And invert the gamma. */ - if (data.gamma != 1) - { - PNG_CONST double power = data.gamma; - - gray = pow(gray, power); - graylo = digitize(pow(graylo, power), sample_depth, 1); - grayhi = digitize(pow(grayhi, power), sample_depth, 1); - } - - /* Now the error can be calculated. - * - * If r==g==b because there is no overall gamma correction libpng - * currently preserves the original value. - */ - if (isgray) - err = (that->rede + that->greene + that->bluee)/3; - - else - { - err = fabs(grayhi-gray); - if (fabs(gray - graylo) > err) - err = fabs(graylo-gray); - - /* Check that this worked: */ - if (err > pm->limit) - { - size_t pos = 0; - char buffer[128]; - - pos = safecat(buffer, sizeof buffer, pos, "rgb_to_gray error "); - pos = safecatd(buffer, sizeof buffer, pos, err, 6); - pos = safecat(buffer, sizeof buffer, pos, " exceeds limit "); - pos = safecatd(buffer, sizeof buffer, pos, pm->limit, 6); - png_error(pp, buffer); - } - } - } -# else /* DIGITIZE */ - { - double r = that->redf; - double re = that->rede; - double g = that->greenf; - double ge = that->greene; - double b = that->bluef; - double be = that->bluee; - - /* The true gray case involves no math. */ - if (r == g && r == b) - { - gray = r; - err = re; - if (err < ge) err = ge; - if (err < be) err = be; - } - - else if (data.gamma == 1) - { - /* There is no need to do the conversions to and from linear space, - * so the calculation should be a lot more accurate. There is a - * built in 1/32768 error in the coefficients because they only have - * 15 bits and are adjusted to make sure they add up to 32768, so - * the result may have an additional error up to 1/32768. (Note - * that adding the 1/32768 here avoids needing to increase the - * global error limits to take this into account.) - */ - gray = r * data.red_coefficient + g * data.green_coefficient + - b * data.blue_coefficient; - err = re * data.red_coefficient + ge * data.green_coefficient + - be * data.blue_coefficient + 1./32768 + gray * 5 * DBL_EPSILON; - } - - else - { - /* The calculation happens in linear space, and this produces much - * wider errors in the encoded space. These are handled here by - * factoring the errors in to the calculation. There are two table - * lookups in the calculation and each introduces a quantization - * error defined by the table size. - */ - PNG_CONST png_modifier *pm = display->pm; - double in_qe = (that->sample_depth > 8 ? .5/65535 : .5/255); - double out_qe = (that->sample_depth > 8 ? .5/65535 : - (pm->assume_16_bit_calculations ? .5/(1<<PNG_MAX_GAMMA_8) : - .5/255)); - double rhi, ghi, bhi, grayhi; - double g1 = 1/data.gamma; - - rhi = r + re + in_qe; if (rhi > 1) rhi = 1; - r -= re + in_qe; if (r < 0) r = 0; - ghi = g + ge + in_qe; if (ghi > 1) ghi = 1; - g -= ge + in_qe; if (g < 0) g = 0; - bhi = b + be + in_qe; if (bhi > 1) bhi = 1; - b -= be + in_qe; if (b < 0) b = 0; - - r = pow(r, g1)*(1-DBL_EPSILON); rhi = pow(rhi, g1)*(1+DBL_EPSILON); - g = pow(g, g1)*(1-DBL_EPSILON); ghi = pow(ghi, g1)*(1+DBL_EPSILON); - b = pow(b, g1)*(1-DBL_EPSILON); bhi = pow(bhi, g1)*(1+DBL_EPSILON); - - /* Work out the lower and upper bounds for the gray value in the - * encoded space, then work out an average and error. Remove the - * previously added input quantization error at this point. - */ - gray = r * data.red_coefficient + g * data.green_coefficient + - b * data.blue_coefficient - 1./32768 - out_qe; - if (gray <= 0) - gray = 0; - else - { - gray *= (1 - 6 * DBL_EPSILON); - gray = pow(gray, data.gamma) * (1-DBL_EPSILON); - } - - grayhi = rhi * data.red_coefficient + ghi * data.green_coefficient + - bhi * data.blue_coefficient + 1./32768 + out_qe; - grayhi *= (1 + 6 * DBL_EPSILON); - if (grayhi >= 1) - grayhi = 1; - else - grayhi = pow(grayhi, data.gamma) * (1+DBL_EPSILON); - - err = (grayhi - gray) / 2; - gray = (grayhi + gray) / 2; - - if (err <= in_qe) - err = gray * DBL_EPSILON; - - else - err -= in_qe; - - /* Validate that the error is within limits (this has caused - * problems before, it's much easier to detect them here.) - */ - if (err > pm->limit) - { - size_t pos = 0; - char buffer[128]; - - pos = safecat(buffer, sizeof buffer, pos, "rgb_to_gray error "); - pos = safecatd(buffer, sizeof buffer, pos, err, 6); - pos = safecat(buffer, sizeof buffer, pos, " exceeds limit "); - pos = safecatd(buffer, sizeof buffer, pos, pm->limit, 6); - png_error(pp, buffer); - } - } - } -# endif /* !DIGITIZE */ - - that->bluef = that->greenf = that->redf = gray; - that->bluee = that->greene = that->rede = err; - - /* The sBIT is the minium of the three colour channel sBITs. */ - if (that->red_sBIT > that->green_sBIT) - that->red_sBIT = that->green_sBIT; - if (that->red_sBIT > that->blue_sBIT) - that->red_sBIT = that->blue_sBIT; - that->blue_sBIT = that->green_sBIT = that->red_sBIT; - - /* And remove the colour bit in the type: */ - if (that->colour_type == PNG_COLOR_TYPE_RGB) - that->colour_type = PNG_COLOR_TYPE_GRAY; - else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_rgb_to_gray_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_COLOR) != 0; -} - -#undef data -IT(rgb_to_gray); -#undef PT -#define PT ITSTRUCT(rgb_to_gray) -#undef image_transform_ini -#define image_transform_ini image_transform_default_ini -#endif /* PNG_READ_RGB_TO_GRAY_SUPPORTED */ - -#ifdef PNG_READ_BACKGROUND_SUPPORTED -/* png_set_background(png_structp, png_const_color_16p background_color, - * int background_gamma_code, int need_expand, double background_gamma) - * png_set_background_fixed(png_structp, png_const_color_16p background_color, - * int background_gamma_code, int need_expand, - * png_fixed_point background_gamma) - * - * This ignores the gamma (at present.) -*/ -#define data ITDATA(background) -static image_pixel data; - -static void -image_transform_png_set_background_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_byte colour_type, bit_depth; - png_byte random_bytes[8]; /* 8 bytes - 64 bits - the biggest pixel */ - int expand; - png_color_16 back; - - /* We need a background colour, because we don't know exactly what transforms - * have been set we have to supply the colour in the original file format and - * so we need to know what that is! The background colour is stored in the - * transform_display. - */ - RANDOMIZE(random_bytes); - - /* Read the random value, for colour type 3 the background colour is actually - * expressed as a 24bit rgb, not an index. - */ - colour_type = that->this.colour_type; - if (colour_type == 3) - { - colour_type = PNG_COLOR_TYPE_RGB; - bit_depth = 8; - expand = 0; /* passing in an RGB not a pixel index */ - } - - else - { - bit_depth = that->this.bit_depth; - expand = 1; - } - - image_pixel_init(&data, random_bytes, colour_type, - bit_depth, 0/*x*/, 0/*unused: palette*/); - - /* Extract the background colour from this image_pixel, but make sure the - * unused fields of 'back' are garbage. - */ - RANDOMIZE(back); - - if (colour_type & PNG_COLOR_MASK_COLOR) - { - back.red = (png_uint_16)data.red; - back.green = (png_uint_16)data.green; - back.blue = (png_uint_16)data.blue; - } - - else - back.gray = (png_uint_16)data.red; - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_background(pp, &back, PNG_BACKGROUND_GAMMA_FILE, expand, 0); -# else - png_set_background_fixed(pp, &back, PNG_BACKGROUND_GAMMA_FILE, expand, 0); -# endif - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_background_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - /* Check for tRNS first: */ - if (that->have_tRNS && that->colour_type != PNG_COLOR_TYPE_PALETTE) - image_pixel_add_alpha(that, &display->this); - - /* This is only necessary if the alpha value is less than 1. */ - if (that->alphaf < 1) - { - /* Now we do the background calculation without any gamma correction. */ - if (that->alphaf <= 0) - { - that->redf = data.redf; - that->greenf = data.greenf; - that->bluef = data.bluef; - - that->rede = data.rede; - that->greene = data.greene; - that->bluee = data.bluee; - - that->red_sBIT= data.red_sBIT; - that->green_sBIT= data.green_sBIT; - that->blue_sBIT= data.blue_sBIT; - } - - else /* 0 < alpha < 1 */ - { - double alf = 1 - that->alphaf; - - that->redf = that->redf * that->alphaf + data.redf * alf; - that->rede = that->rede * that->alphaf + data.rede * alf + - DBL_EPSILON; - that->greenf = that->greenf * that->alphaf + data.greenf * alf; - that->greene = that->greene * that->alphaf + data.greene * alf + - DBL_EPSILON; - that->bluef = that->bluef * that->alphaf + data.bluef * alf; - that->bluee = that->bluee * that->alphaf + data.bluee * alf + - DBL_EPSILON; - } - - /* Remove the alpha type and set the alpha (not in that order.) */ - that->alphaf = 1; - that->alphae = 0; - - if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB; - else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY; - /* PNG_COLOR_TYPE_PALETTE is not changed */ - } - - this->next->mod(this->next, that, pp, display); -} - -#define image_transform_png_set_background_add image_transform_default_add - -#undef data -IT(background); -#undef PT -#define PT ITSTRUCT(background) -#endif /* PNG_READ_BACKGROUND_SUPPORTED */ - -/* This may just be 'end' if all the transforms are disabled! */ -static image_transform *PNG_CONST image_transform_first = &PT; - -static void -transform_enable(PNG_CONST char *name) -{ - /* Everything starts out enabled, so if we see an 'enable' disabled - * everything else the first time round. - */ - static int all_disabled = 0; - int found_it = 0; - image_transform *list = image_transform_first; - - while (list != &image_transform_end) - { - if (strcmp(list->name, name) == 0) - { - list->enable = 1; - found_it = 1; - } - else if (!all_disabled) - list->enable = 0; - - list = list->list; - } - - all_disabled = 1; - - if (!found_it) - { - fprintf(stderr, "pngvalid: --transform-enable=%s: unknown transform\n", - name); - exit(99); - } -} - -static void -transform_disable(PNG_CONST char *name) -{ - image_transform *list = image_transform_first; - - while (list != &image_transform_end) - { - if (strcmp(list->name, name) == 0) - { - list->enable = 0; - return; - } - - list = list->list; - } - - fprintf(stderr, "pngvalid: --transform-disable=%s: unknown transform\n", - name); - exit(99); -} - -static void -image_transform_reset_count(void) -{ - image_transform *next = image_transform_first; - int count = 0; - - while (next != &image_transform_end) - { - next->local_use = 0; - next->next = 0; - next = next->list; - ++count; - } - - /* This can only happen if we every have more than 32 transforms (excluding - * the end) in the list. - */ - if (count > 32) abort(); -} - -static int -image_transform_test_counter(png_uint_32 counter, unsigned int max) -{ - /* Test the list to see if there is any point contining, given a current - * counter and a 'max' value. - */ - image_transform *next = image_transform_first; - - while (next != &image_transform_end) - { - /* For max 0 or 1 continue until the counter overflows: */ - counter >>= 1; - - /* Continue if any entry hasn't reacked the max. */ - if (max > 1 && next->local_use < max) - return 1; - next = next->list; - } - - return max <= 1 && counter == 0; -} - -static png_uint_32 -image_transform_add(PNG_CONST image_transform **this, unsigned int max, - png_uint_32 counter, char *name, size_t sizeof_name, size_t *pos, - png_byte colour_type, png_byte bit_depth) -{ - for (;;) /* until we manage to add something */ - { - png_uint_32 mask; - image_transform *list; - - /* Find the next counter value, if the counter is zero this is the start - * of the list. This routine always returns the current counter (not the - * next) so it returns 0 at the end and expects 0 at the beginning. - */ - if (counter == 0) /* first time */ - { - image_transform_reset_count(); - if (max <= 1) - counter = 1; - else - counter = random_32(); - } - else /* advance the counter */ - { - switch (max) - { - case 0: ++counter; break; - case 1: counter <<= 1; break; - default: counter = random_32(); break; - } - } - - /* Now add all these items, if possible */ - *this = &image_transform_end; - list = image_transform_first; - mask = 1; - - /* Go through the whole list adding anything that the counter selects: */ - while (list != &image_transform_end) - { - if ((counter & mask) != 0 && list->enable && - (max == 0 || list->local_use < max)) - { - /* Candidate to add: */ - if (list->add(list, this, colour_type, bit_depth) || max == 0) - { - /* Added, so add to the name too. */ - *pos = safecat(name, sizeof_name, *pos, " +"); - *pos = safecat(name, sizeof_name, *pos, list->name); - } - - else - { - /* Not useful and max>0, so remove it from *this: */ - *this = list->next; - list->next = 0; - - /* And, since we know it isn't useful, stop it being added again - * in this run: - */ - list->local_use = max; - } - } - - mask <<= 1; - list = list->list; - } - - /* Now if anything was added we have something to do. */ - if (*this != &image_transform_end) - return counter; - - /* Nothing added, but was there anything in there to add? */ - if (!image_transform_test_counter(counter, max)) - return 0; - } -} - -#ifdef THIS_IS_THE_PROFORMA -static void -image_transform_png_set_@_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_@(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_@_mod(PNG_CONST image_transform *this, - image_pixel *that, png_const_structp pp, - PNG_CONST transform_display *display) -{ - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_@_add(image_transform *this, - PNG_CONST image_transform **that, char *name, size_t sizeof_name, - size_t *pos, png_byte colour_type, png_byte bit_depth) -{ - this->next = *that; - *that = this; - - *pos = safecat(name, sizeof_name, *pos, " +@"); - - return 1; -} - -IT(@); -#endif - -/* png_set_quantize(png_structp, png_colorp palette, int num_palette, - * int maximum_colors, png_const_uint_16p histogram, int full_quantize) - * - * Very difficult to validate this! - */ -/*NOTE: TBD NYI */ - -/* The data layout transforms are handled by swapping our own channel data, - * necessarily these need to happen at the end of the transform list because the - * semantic of the channels changes after these are executed. Some of these, - * like set_shift and set_packing, can't be done at present because they change - * the layout of the data at the sub-sample level so sample() won't get the - * right answer. - */ -/* png_set_invert_alpha */ -/*NOTE: TBD NYI */ - -/* png_set_bgr */ -/*NOTE: TBD NYI */ - -/* png_set_swap_alpha */ -/*NOTE: TBD NYI */ - -/* png_set_swap */ -/*NOTE: TBD NYI */ - -/* png_set_filler, (png_structp png_ptr, png_uint_32 filler, int flags)); */ -/*NOTE: TBD NYI */ - -/* png_set_add_alpha, (png_structp png_ptr, png_uint_32 filler, int flags)); */ -/*NOTE: TBD NYI */ - -/* png_set_packing */ -/*NOTE: TBD NYI */ - -/* png_set_packswap */ -/*NOTE: TBD NYI */ - -/* png_set_invert_mono */ -/*NOTE: TBD NYI */ - -/* png_set_shift(png_structp, png_const_color_8p true_bits) */ -/*NOTE: TBD NYI */ - -static void -perform_transform_test(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - while (next_format(&colour_type, &bit_depth, &palette_number, 0)) - { - png_uint_32 counter = 0; - size_t base_pos; - char name[64]; - - base_pos = safecat(name, sizeof name, 0, "transform:"); - - for (;;) - { - size_t pos = base_pos; - PNG_CONST image_transform *list = 0; - - /* 'max' is currently hardwired to '1'; this should be settable on the - * command line. - */ - counter = image_transform_add(&list, 1/*max*/, counter, - name, sizeof name, &pos, colour_type, bit_depth); - - if (counter == 0) - break; - - /* The command line can change this to checking interlaced images. */ - do - { - pm->repeat = 0; - transform_test(pm, FILEID(colour_type, bit_depth, palette_number, - pm->interlace_type, 0, 0, 0), list, name); - - if (fail(pm)) - return; - } - while (pm->repeat); - } - } -} -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -/********************************* GAMMA TESTS ********************************/ -#ifdef PNG_READ_GAMMA_SUPPORTED -/* Reader callbacks and implementations, where they differ from the standard - * ones. - */ -typedef struct gamma_display -{ - standard_display this; - - /* Parameters */ - png_modifier* pm; - double file_gamma; - double screen_gamma; - double background_gamma; - png_byte sbit; - int threshold_test; - int use_input_precision; - int scale16; - int expand16; - int do_background; - png_color_16 background_color; - - /* Local variables */ - double maxerrout; - double maxerrpc; - double maxerrabs; -} gamma_display; - -#define ALPHA_MODE_OFFSET 4 - -static void -gamma_display_init(gamma_display *dp, png_modifier *pm, png_uint_32 id, - double file_gamma, double screen_gamma, png_byte sbit, int threshold_test, - int use_input_precision, int scale16, int expand16, - int do_background, PNG_CONST png_color_16 *pointer_to_the_background_color, - double background_gamma) -{ - /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/, - pm->use_update_info); - - /* Parameter fields */ - dp->pm = pm; - dp->file_gamma = file_gamma; - dp->screen_gamma = screen_gamma; - dp->background_gamma = background_gamma; - dp->sbit = sbit; - dp->threshold_test = threshold_test; - dp->use_input_precision = use_input_precision; - dp->scale16 = scale16; - dp->expand16 = expand16; - dp->do_background = do_background; - if (do_background && pointer_to_the_background_color != 0) - dp->background_color = *pointer_to_the_background_color; - else - memset(&dp->background_color, 0, sizeof dp->background_color); - - /* Local variable fields */ - dp->maxerrout = dp->maxerrpc = dp->maxerrabs = 0; -} - -static void -gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) -{ - /* Reuse the standard stuff as appropriate. */ - standard_info_part1(&dp->this, pp, pi); - - /* If requested strip 16 to 8 bits - this is handled automagically below - * because the output bit depth is read from the library. Note that there - * are interactions with sBIT but, internally, libpng makes sbit at most - * PNG_MAX_GAMMA_8 when doing the following. - */ - if (dp->scale16) -# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(pp); -# else - /* The following works both in 1.5.4 and earlier versions: */ -# ifdef PNG_READ_16_TO_8_SUPPORTED - png_set_strip_16(pp); -# else - png_error(pp, "scale16 (16 to 8 bit conversion) not supported"); -# endif -# endif - - if (dp->expand16) -# ifdef PNG_READ_EXPAND_16_SUPPORTED - png_set_expand_16(pp); -# else - png_error(pp, "expand16 (8 to 16 bit conversion) not supported"); -# endif - - if (dp->do_background >= ALPHA_MODE_OFFSET) - { -# ifdef PNG_READ_ALPHA_MODE_SUPPORTED - { - /* This tests the alpha mode handling, if supported. */ - int mode = dp->do_background - ALPHA_MODE_OFFSET; - - /* The gamma value is the output gamma, and is in the standard, - * non-inverted, represenation. It provides a default for the PNG file - * gamma, but since the file has a gAMA chunk this does not matter. - */ - PNG_CONST double sg = dp->screen_gamma; -# ifndef PNG_FLOATING_POINT_SUPPORTED - PNG_CONST png_fixed_point g = fix(sg); -# endif - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_alpha_mode(pp, mode, sg); -# else - png_set_alpha_mode_fixed(pp, mode, g); -# endif - - /* However, for the standard Porter-Duff algorithm the output defaults - * to be linear, so if the test requires non-linear output it must be - * corrected here. - */ - if (mode == PNG_ALPHA_STANDARD && sg != 1) - { -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_gamma(pp, sg, dp->file_gamma); -# else - png_fixed_point f = fix(dp->file_gamma); - png_set_gamma_fixed(pp, g, f); -# endif - } - } -# else - png_error(pp, "alpha mode handling not supported"); -# endif - } - - else - { - /* Set up gamma processing. */ -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_gamma(pp, dp->screen_gamma, dp->file_gamma); -# else - { - png_fixed_point s = fix(dp->screen_gamma); - png_fixed_point f = fix(dp->file_gamma); - png_set_gamma_fixed(pp, s, f); - } -# endif - - if (dp->do_background) - { -# ifdef PNG_READ_BACKGROUND_SUPPORTED - /* NOTE: this assumes the caller provided the correct background gamma! - */ - PNG_CONST double bg = dp->background_gamma; -# ifndef PNG_FLOATING_POINT_SUPPORTED - PNG_CONST png_fixed_point g = fix(bg); -# endif - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_background(pp, &dp->background_color, dp->do_background, - 0/*need_expand*/, bg); -# else - png_set_background_fixed(pp, &dp->background_color, - dp->do_background, 0/*need_expand*/, g); -# endif -# else - png_error(pp, "png_set_background not supported"); -# endif - } - } - - { - int i = dp->this.use_update_info; - /* Always do one call, even if use_update_info is 0. */ - do - png_read_update_info(pp, pi); - while (--i > 0); - } - - /* Now we may get a different cbRow: */ - standard_info_part2(&dp->this, pp, pi, 1 /*images*/); -} - -static void PNGCBAPI -gamma_info(png_structp pp, png_infop pi) -{ - gamma_info_imp(voidcast(gamma_display*, png_get_progressive_ptr(pp)), pp, - pi); -} - -/* Validate a single component value - the routine gets the input and output - * sample values as unscaled PNG component values along with a cache of all the - * information required to validate the values. - */ -typedef struct validate_info -{ - png_const_structp pp; - gamma_display *dp; - png_byte sbit; - int use_input_precision; - int do_background; - int scale16; - unsigned int sbit_max; - unsigned int isbit_shift; - unsigned int outmax; - - double gamma_correction; /* Overall correction required. */ - double file_inverse; /* Inverse of file gamma. */ - double screen_gamma; - double screen_inverse; /* Inverse of screen gamma. */ - - double background_red; /* Linear background value, red or gray. */ - double background_green; - double background_blue; - - double maxabs; - double maxpc; - double maxcalc; - double maxout; - double maxout_total; /* Total including quantization error */ - double outlog; - int outquant; -} -validate_info; - -static void -init_validate_info(validate_info *vi, gamma_display *dp, png_const_structp pp, - int in_depth, int out_depth) -{ - PNG_CONST unsigned int outmax = (1U<<out_depth)-1; - - vi->pp = pp; - vi->dp = dp; - - if (dp->sbit > 0 && dp->sbit < in_depth) - { - vi->sbit = dp->sbit; - vi->isbit_shift = in_depth - dp->sbit; - } - - else - { - vi->sbit = (png_byte)in_depth; - vi->isbit_shift = 0; - } - - vi->sbit_max = (1U << vi->sbit)-1; - - /* This mimics the libpng threshold test, '0' is used to prevent gamma - * correction in the validation test. - */ - vi->screen_gamma = dp->screen_gamma; - if (fabs(vi->screen_gamma-1) < PNG_GAMMA_THRESHOLD) - vi->screen_gamma = vi->screen_inverse = 0; - else - vi->screen_inverse = 1/vi->screen_gamma; - - vi->use_input_precision = dp->use_input_precision; - vi->outmax = outmax; - vi->maxabs = abserr(dp->pm, in_depth, out_depth); - vi->maxpc = pcerr(dp->pm, in_depth, out_depth); - vi->maxcalc = calcerr(dp->pm, in_depth, out_depth); - vi->maxout = outerr(dp->pm, in_depth, out_depth); - vi->outquant = output_quantization_factor(dp->pm, in_depth, out_depth); - vi->maxout_total = vi->maxout + vi->outquant * .5; - vi->outlog = outlog(dp->pm, in_depth, out_depth); - - if ((dp->this.colour_type & PNG_COLOR_MASK_ALPHA) != 0 || - (dp->this.colour_type == 3 && dp->this.is_transparent)) - { - vi->do_background = dp->do_background; - - if (vi->do_background != 0) - { - PNG_CONST double bg_inverse = 1/dp->background_gamma; - double r, g, b; - - /* Caller must at least put the gray value into the red channel */ - r = dp->background_color.red; r /= outmax; - g = dp->background_color.green; g /= outmax; - b = dp->background_color.blue; b /= outmax; - -# if 0 - /* libpng doesn't do this optimization, if we do pngvalid will fail. - */ - if (fabs(bg_inverse-1) >= PNG_GAMMA_THRESHOLD) -# endif - { - r = pow(r, bg_inverse); - g = pow(g, bg_inverse); - b = pow(b, bg_inverse); - } - - vi->background_red = r; - vi->background_green = g; - vi->background_blue = b; - } - } - else - vi->do_background = 0; - - if (vi->do_background == 0) - vi->background_red = vi->background_green = vi->background_blue = 0; - - vi->gamma_correction = 1/(dp->file_gamma*dp->screen_gamma); - if (fabs(vi->gamma_correction-1) < PNG_GAMMA_THRESHOLD) - vi->gamma_correction = 0; - - vi->file_inverse = 1/dp->file_gamma; - if (fabs(vi->file_inverse-1) < PNG_GAMMA_THRESHOLD) - vi->file_inverse = 0; - - vi->scale16 = dp->scale16; -} - -/* This function handles composition of a single non-alpha component. The - * argument is the input sample value, in the range 0..1, and the alpha value. - * The result is the composed, linear, input sample. If alpha is less than zero - * this is the alpha component and the function should not be called! - */ -static double -gamma_component_compose(int do_background, double input_sample, double alpha, - double background, int *compose) -{ - switch (do_background) - { -#ifdef PNG_READ_BACKGROUND_SUPPORTED - case PNG_BACKGROUND_GAMMA_SCREEN: - case PNG_BACKGROUND_GAMMA_FILE: - case PNG_BACKGROUND_GAMMA_UNIQUE: - /* Standard PNG background processing. */ - if (alpha < 1) - { - if (alpha > 0) - { - input_sample = input_sample * alpha + background * (1-alpha); - if (compose != NULL) - *compose = 1; - } - - else - input_sample = background; - } - break; -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: - case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: - /* The components are premultiplied in either case and the output is - * gamma encoded (to get standard Porter-Duff we expect the output - * gamma to be set to 1.0!) - */ - case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: - /* The optimization is that the partial-alpha entries are linear - * while the opaque pixels are gamma encoded, but this only affects the - * output encoding. - */ - if (alpha < 1) - { - if (alpha > 0) - { - input_sample *= alpha; - if (compose != NULL) - *compose = 1; - } - - else - input_sample = 0; - } - break; -#endif - - default: - /* Standard cases where no compositing is done (so the component - * value is already correct.) - */ - UNUSED(alpha) - UNUSED(background) - UNUSED(compose) - break; - } - - return input_sample; -} - -/* This API returns the encoded *input* component, in the range 0..1 */ -static double -gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, - PNG_CONST unsigned int id, PNG_CONST unsigned int od, - PNG_CONST double alpha /* <0 for the alpha channel itself */, - PNG_CONST double background /* component background value */) -{ - PNG_CONST unsigned int isbit = id >> vi->isbit_shift; - PNG_CONST unsigned int sbit_max = vi->sbit_max; - PNG_CONST unsigned int outmax = vi->outmax; - PNG_CONST int do_background = vi->do_background; - - double i; - - /* First check on the 'perfect' result obtained from the digitized input - * value, id, and compare this against the actual digitized result, 'od'. - * 'i' is the input result in the range 0..1: - */ - i = isbit; i /= sbit_max; - - /* Check for the fast route: if we don't do any background composition or if - * this is the alpha channel ('alpha' < 0) or if the pixel is opaque then - * just use the gamma_correction field to correct to the final output gamma. - */ - if (alpha == 1 /* opaque pixel component */ || !do_background -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - || do_background == ALPHA_MODE_OFFSET + PNG_ALPHA_PNG -#endif - || (alpha < 0 /* alpha channel */ -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - && do_background != ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN -#endif - )) - { - /* Then get the gamma corrected version of 'i' and compare to 'od', any - * error less than .5 is insignificant - just quantization of the output - * value to the nearest digital value (nevertheless the error is still - * recorded - it's interesting ;-) - */ - double encoded_sample = i; - double encoded_error; - - /* alpha less than 0 indicates the alpha channel, which is always linear - */ - if (alpha >= 0 && vi->gamma_correction > 0) - encoded_sample = pow(encoded_sample, vi->gamma_correction); - encoded_sample *= outmax; - - encoded_error = fabs(od-encoded_sample); - - if (encoded_error > vi->dp->maxerrout) - vi->dp->maxerrout = encoded_error; - - if (encoded_error < vi->maxout_total && encoded_error < vi->outlog) - return i; - } - - /* The slow route - attempt to do linear calculations. */ - /* There may be an error, or background processing is required, so calculate - * the actual sample values - unencoded light intensity values. Note that in - * practice these are not completely unencoded because they include a - * 'viewing correction' to decrease or (normally) increase the perceptual - * contrast of the image. There's nothing we can do about this - we don't - * know what it is - so assume the unencoded value is perceptually linear. - */ - { - double input_sample = i; /* In range 0..1 */ - double output, error, encoded_sample, encoded_error; - double es_lo, es_hi; - int compose = 0; /* Set to one if composition done */ - int output_is_encoded; /* Set if encoded to screen gamma */ - int log_max_error = 1; /* Check maximum error values */ - png_const_charp pass = 0; /* Reason test passes (or 0 for fail) */ - - /* Convert to linear light (with the above caveat.) The alpha channel is - * already linear. - */ - if (alpha >= 0) - { - int tcompose; - - if (vi->file_inverse > 0) - input_sample = pow(input_sample, vi->file_inverse); - - /* Handle the compose processing: */ - tcompose = 0; - input_sample = gamma_component_compose(do_background, input_sample, - alpha, background, &tcompose); - - if (tcompose) - compose = 1; - } - - /* And similarly for the output value, but we need to check the background - * handling to linearize it correctly. - */ - output = od; - output /= outmax; - - output_is_encoded = vi->screen_gamma > 0; - - if (alpha < 0) /* The alpha channel */ - { -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - if (do_background != ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN) -#endif - { - /* In all other cases the output alpha channel is linear already, - * don't log errors here, they are much larger in linear data. - */ - output_is_encoded = 0; - log_max_error = 0; - } - } - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - else /* A component */ - { - if (do_background == ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED && - alpha < 1) /* the optimized case - linear output */ - { - if (alpha > 0) log_max_error = 0; - output_is_encoded = 0; - } - } -#endif - - if (output_is_encoded) - output = pow(output, vi->screen_gamma); - - /* Calculate (or recalculate) the encoded_sample value and repeat the - * check above (unnecessary if we took the fast route, but harmless.) - */ - encoded_sample = input_sample; - if (output_is_encoded) - encoded_sample = pow(encoded_sample, vi->screen_inverse); - encoded_sample *= outmax; - - encoded_error = fabs(od-encoded_sample); - - /* Don't log errors in the alpha channel, or the 'optimized' case, - * neither are significant to the overall perception. - */ - if (log_max_error && encoded_error > vi->dp->maxerrout) - vi->dp->maxerrout = encoded_error; - - if (encoded_error < vi->maxout_total) - { - if (encoded_error < vi->outlog) - return i; - - /* Test passed but error is bigger than the log limit, record why the - * test passed: - */ - pass = "less than maxout:\n"; - } - - /* i: the original input value in the range 0..1 - * - * pngvalid calculations: - * input_sample: linear result; i linearized and composed, range 0..1 - * encoded_sample: encoded result; input_sample scaled to ouput bit depth - * - * libpng calculations: - * output: linear result; od scaled to 0..1 and linearized - * od: encoded result from libpng - */ - - /* Now we have the numbers for real errors, both absolute values as as a - * percentage of the correct value (output): - */ - error = fabs(input_sample-output); - - if (log_max_error && error > vi->dp->maxerrabs) - vi->dp->maxerrabs = error; - - /* The following is an attempt to ignore the tendency of quantization to - * dominate the percentage errors for lower result values: - */ - if (log_max_error && input_sample > .5) - { - double percentage_error = error/input_sample; - if (percentage_error > vi->dp->maxerrpc) - vi->dp->maxerrpc = percentage_error; - } - - /* Now calculate the digitization limits for 'encoded_sample' using the - * 'max' values. Note that maxout is in the encoded space but maxpc and - * maxabs are in linear light space. - * - * First find the maximum error in linear light space, range 0..1: - */ - { - double tmp = input_sample * vi->maxpc; - if (tmp < vi->maxabs) tmp = vi->maxabs; - /* If 'compose' is true the composition was done in linear space using - * integer arithmetic. This introduces an extra error of +/- 0.5 (at - * least) in the integer space used. 'maxcalc' records this, taking - * into account the possibility that even for 16 bit output 8 bit space - * may have been used. - */ - if (compose && tmp < vi->maxcalc) tmp = vi->maxcalc; - - /* The 'maxout' value refers to the encoded result, to compare with - * this encode input_sample adjusted by the maximum error (tmp) above. - */ - es_lo = encoded_sample - vi->maxout; - - if (es_lo > 0 && input_sample-tmp > 0) - { - double low_value = input_sample-tmp; - if (output_is_encoded) - low_value = pow(low_value, vi->screen_inverse); - low_value *= outmax; - if (low_value < es_lo) es_lo = low_value; - - /* Quantize this appropriately: */ - es_lo = ceil(es_lo / vi->outquant - .5) * vi->outquant; - } - - else - es_lo = 0; - - es_hi = encoded_sample + vi->maxout; - - if (es_hi < outmax && input_sample+tmp < 1) - { - double high_value = input_sample+tmp; - if (output_is_encoded) - high_value = pow(high_value, vi->screen_inverse); - high_value *= outmax; - if (high_value > es_hi) es_hi = high_value; - - es_hi = floor(es_hi / vi->outquant + .5) * vi->outquant; - } - - else - es_hi = outmax; - } - - /* The primary test is that the final encoded value returned by the - * library should be between the two limits (inclusive) that were - * calculated above. - */ - if (od >= es_lo && od <= es_hi) - { - /* The value passes, but we may need to log the information anyway. */ - if (encoded_error < vi->outlog) - return i; - - if (pass == 0) - pass = "within digitization limits:\n"; - } - - { - /* There has been an error in processing, or we need to log this - * value. - */ - double is_lo, is_hi; - - /* pass is set at this point if either of the tests above would have - * passed. Don't do these additional tests here - just log the - * original [es_lo..es_hi] values. - */ - if (pass == 0 && vi->use_input_precision && vi->dp->sbit) - { - /* Ok, something is wrong - this actually happens in current libpng - * 16-to-8 processing. Assume that the input value (id, adjusted - * for sbit) can be anywhere between value-.5 and value+.5 - quite a - * large range if sbit is low. - * - * NOTE: at present because the libpng gamma table stuff has been - * changed to use a rounding algorithm to correct errors in 8-bit - * calculations the precise sbit calculation (a shift) has been - * lost. This can result in up to a +/-1 error in the presence of - * an sbit less than the bit depth. - */ -# if PNG_LIBPNG_VER < 10700 -# define SBIT_ERROR .5 -# else -# define SBIT_ERROR 1. -# endif - double tmp = (isbit - SBIT_ERROR)/sbit_max; - - if (tmp <= 0) - tmp = 0; - - else if (alpha >= 0 && vi->file_inverse > 0 && tmp < 1) - tmp = pow(tmp, vi->file_inverse); - - tmp = gamma_component_compose(do_background, tmp, alpha, background, - NULL); - - if (output_is_encoded && tmp > 0 && tmp < 1) - tmp = pow(tmp, vi->screen_inverse); - - is_lo = ceil(outmax * tmp - vi->maxout_total); - - if (is_lo < 0) - is_lo = 0; - - tmp = (isbit + SBIT_ERROR)/sbit_max; - - if (tmp >= 1) - tmp = 1; - - else if (alpha >= 0 && vi->file_inverse > 0 && tmp < 1) - tmp = pow(tmp, vi->file_inverse); - - tmp = gamma_component_compose(do_background, tmp, alpha, background, - NULL); - - if (output_is_encoded && tmp > 0 && tmp < 1) - tmp = pow(tmp, vi->screen_inverse); - - is_hi = floor(outmax * tmp + vi->maxout_total); - - if (is_hi > outmax) - is_hi = outmax; - - if (!(od < is_lo || od > is_hi)) - { - if (encoded_error < vi->outlog) - return i; - - pass = "within input precision limits:\n"; - } - - /* One last chance. If this is an alpha channel and the 16to8 - * option has been used and 'inaccurate' scaling is used then the - * bit reduction is obtained by simply using the top 8 bits of the - * value. - * - * This is only done for older libpng versions when the 'inaccurate' - * (chop) method of scaling was used. - */ -# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED -# if PNG_LIBPNG_VER < 10504 - /* This may be required for other components in the future, - * but at present the presence of gamma correction effectively - * prevents the errors in the component scaling (I don't quite - * understand why, but since it's better this way I care not - * to ask, JB 20110419.) - */ - if (pass == 0 && alpha < 0 && vi->scale16 && vi->sbit > 8 && - vi->sbit + vi->isbit_shift == 16) - { - tmp = ((id >> 8) - .5)/255; - - if (tmp > 0) - { - is_lo = ceil(outmax * tmp - vi->maxout_total); - if (is_lo < 0) is_lo = 0; - } - - else - is_lo = 0; - - tmp = ((id >> 8) + .5)/255; - - if (tmp < 1) - { - is_hi = floor(outmax * tmp + vi->maxout_total); - if (is_hi > outmax) is_hi = outmax; - } - - else - is_hi = outmax; - - if (!(od < is_lo || od > is_hi)) - { - if (encoded_error < vi->outlog) - return i; - - pass = "within 8 bit limits:\n"; - } - } -# endif -# endif - } - else /* !use_input_precision */ - is_lo = es_lo, is_hi = es_hi; - - /* Attempt to output a meaningful error/warning message: the message - * output depends on the background/composite operation being performed - * because this changes what parameters were actually used above. - */ - { - size_t pos = 0; - /* Need either 1/255 or 1/65535 precision here; 3 or 6 decimal - * places. Just use outmax to work out which. - */ - int precision = (outmax >= 1000 ? 6 : 3); - int use_input=1, use_background=0, do_compose=0; - char msg[256]; - - if (pass != 0) - pos = safecat(msg, sizeof msg, pos, "\n\t"); - - /* Set up the various flags, the output_is_encoded flag above - * is also used below. do_compose is just a double check. - */ - switch (do_background) - { -# ifdef PNG_READ_BACKGROUND_SUPPORTED - case PNG_BACKGROUND_GAMMA_SCREEN: - case PNG_BACKGROUND_GAMMA_FILE: - case PNG_BACKGROUND_GAMMA_UNIQUE: - use_background = (alpha >= 0 && alpha < 1); - /*FALL THROUGH*/ -# endif -# ifdef PNG_READ_ALPHA_MODE_SUPPORTED - case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: - case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: - case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: -# endif /* ALPHA_MODE_SUPPORTED */ - do_compose = (alpha > 0 && alpha < 1); - use_input = (alpha != 0); - break; - - default: - break; - } - - /* Check the 'compose' flag */ - if (compose != do_compose) - png_error(vi->pp, "internal error (compose)"); - - /* 'name' is the component name */ - pos = safecat(msg, sizeof msg, pos, name); - pos = safecat(msg, sizeof msg, pos, "("); - pos = safecatn(msg, sizeof msg, pos, id); - if (use_input || pass != 0/*logging*/) - { - if (isbit != id) - { - /* sBIT has reduced the precision of the input: */ - pos = safecat(msg, sizeof msg, pos, ", sbit("); - pos = safecatn(msg, sizeof msg, pos, vi->sbit); - pos = safecat(msg, sizeof msg, pos, "): "); - pos = safecatn(msg, sizeof msg, pos, isbit); - } - pos = safecat(msg, sizeof msg, pos, "/"); - /* The output is either "id/max" or "id sbit(sbit): isbit/max" */ - pos = safecatn(msg, sizeof msg, pos, vi->sbit_max); - } - pos = safecat(msg, sizeof msg, pos, ")"); - - /* A component may have been multiplied (in linear space) by the - * alpha value, 'compose' says whether this is relevant. - */ - if (compose || pass != 0) - { - /* If any form of composition is being done report our - * calculated linear value here (the code above doesn't record - * the input value before composition is performed, so what - * gets reported is the value after composition.) - */ - if (use_input || pass != 0) - { - if (vi->file_inverse > 0) - { - pos = safecat(msg, sizeof msg, pos, "^"); - pos = safecatd(msg, sizeof msg, pos, vi->file_inverse, 2); - } - - else - pos = safecat(msg, sizeof msg, pos, "[linear]"); - - pos = safecat(msg, sizeof msg, pos, "*(alpha)"); - pos = safecatd(msg, sizeof msg, pos, alpha, precision); - } - - /* Now record the *linear* background value if it was used - * (this function is not passed the original, non-linear, - * value but it is contained in the test name.) - */ - if (use_background) - { - pos = safecat(msg, sizeof msg, pos, use_input ? "+" : " "); - pos = safecat(msg, sizeof msg, pos, "(background)"); - pos = safecatd(msg, sizeof msg, pos, background, precision); - pos = safecat(msg, sizeof msg, pos, "*"); - pos = safecatd(msg, sizeof msg, pos, 1-alpha, precision); - } - } - - /* Report the calculated value (input_sample) and the linearized - * libpng value (output) unless this is just a component gamma - * correction. - */ - if (compose || alpha < 0 || pass != 0) - { - pos = safecat(msg, sizeof msg, pos, - pass != 0 ? " =\n\t" : " = "); - pos = safecatd(msg, sizeof msg, pos, input_sample, precision); - pos = safecat(msg, sizeof msg, pos, " (libpng: "); - pos = safecatd(msg, sizeof msg, pos, output, precision); - pos = safecat(msg, sizeof msg, pos, ")"); - - /* Finally report the output gamma encoding, if any. */ - if (output_is_encoded) - { - pos = safecat(msg, sizeof msg, pos, " ^"); - pos = safecatd(msg, sizeof msg, pos, vi->screen_inverse, 2); - pos = safecat(msg, sizeof msg, pos, "(to screen) ="); - } - - else - pos = safecat(msg, sizeof msg, pos, " [screen is linear] ="); - } - - if ((!compose && alpha >= 0) || pass != 0) - { - if (pass != 0) /* logging */ - pos = safecat(msg, sizeof msg, pos, "\n\t[overall:"); - - /* This is the non-composition case, the internal linear - * values are irrelevant (though the log below will reveal - * them.) Output a much shorter warning/error message and report - * the overall gamma correction. - */ - if (vi->gamma_correction > 0) - { - pos = safecat(msg, sizeof msg, pos, " ^"); - pos = safecatd(msg, sizeof msg, pos, vi->gamma_correction, 2); - pos = safecat(msg, sizeof msg, pos, "(gamma correction) ="); - } - - else - pos = safecat(msg, sizeof msg, pos, - " [no gamma correction] ="); - - if (pass != 0) - pos = safecat(msg, sizeof msg, pos, "]"); - } - - /* This is our calculated encoded_sample which should (but does - * not) match od: - */ - pos = safecat(msg, sizeof msg, pos, pass != 0 ? "\n\t" : " "); - pos = safecatd(msg, sizeof msg, pos, is_lo, 1); - pos = safecat(msg, sizeof msg, pos, " < "); - pos = safecatd(msg, sizeof msg, pos, encoded_sample, 1); - pos = safecat(msg, sizeof msg, pos, " (libpng: "); - pos = safecatn(msg, sizeof msg, pos, od); - pos = safecat(msg, sizeof msg, pos, ")"); - pos = safecat(msg, sizeof msg, pos, "/"); - pos = safecatn(msg, sizeof msg, pos, outmax); - pos = safecat(msg, sizeof msg, pos, " < "); - pos = safecatd(msg, sizeof msg, pos, is_hi, 1); - - if (pass == 0) /* The error condition */ - { -# ifdef PNG_WARNINGS_SUPPORTED - png_warning(vi->pp, msg); -# else - store_warning(vi->pp, msg); -# endif - } - - else /* logging this value */ - store_verbose(&vi->dp->pm->this, vi->pp, pass, msg); - } - } - } - - return i; -} - -static void -gamma_image_validate(gamma_display *dp, png_const_structp pp, - png_infop pi) -{ - /* Get some constants derived from the input and output file formats: */ - PNG_CONST png_store* PNG_CONST ps = dp->this.ps; - PNG_CONST png_byte in_ct = dp->this.colour_type; - PNG_CONST png_byte in_bd = dp->this.bit_depth; - PNG_CONST png_uint_32 w = dp->this.w; - PNG_CONST png_uint_32 h = dp->this.h; - PNG_CONST size_t cbRow = dp->this.cbRow; - PNG_CONST png_byte out_ct = png_get_color_type(pp, pi); - PNG_CONST png_byte out_bd = png_get_bit_depth(pp, pi); - - /* There are three sources of error, firstly the quantization in the - * file encoding, determined by sbit and/or the file depth, secondly - * the output (screen) gamma and thirdly the output file encoding. - * - * Since this API receives the screen and file gamma in double - * precision it is possible to calculate an exact answer given an input - * pixel value. Therefore we assume that the *input* value is exact - - * sample/maxsample - calculate the corresponding gamma corrected - * output to the limits of double precision arithmetic and compare with - * what libpng returns. - * - * Since the library must quantize the output to 8 or 16 bits there is - * a fundamental limit on the accuracy of the output of +/-.5 - this - * quantization limit is included in addition to the other limits - * specified by the paramaters to the API. (Effectively, add .5 - * everywhere.) - * - * The behavior of the 'sbit' paramter is defined by section 12.5 - * (sample depth scaling) of the PNG spec. That section forces the - * decoder to assume that the PNG values have been scaled if sBIT is - * present: - * - * png-sample = floor( input-sample * (max-out/max-in) + .5); - * - * This means that only a subset of the possible PNG values should - * appear in the input. However, the spec allows the encoder to use a - * variety of approximations to the above and doesn't require any - * restriction of the values produced. - * - * Nevertheless the spec requires that the upper 'sBIT' bits of the - * value stored in a PNG file be the original sample bits. - * Consequently the code below simply scales the top sbit bits by - * (1<<sbit)-1 to obtain an original sample value. - * - * Because there is limited precision in the input it is arguable that - * an acceptable result is any valid result from input-.5 to input+.5. - * The basic tests below do not do this, however if 'use_input_precision' - * is set a subsequent test is performed above. - */ - PNG_CONST unsigned int samples_per_pixel = (out_ct & 2U) ? 3U : 1U; - int processing; - png_uint_32 y; - PNG_CONST store_palette_entry *in_palette = dp->this.palette; - PNG_CONST int in_is_transparent = dp->this.is_transparent; - int out_npalette = -1; - int out_is_transparent = 0; /* Just refers to the palette case */ - store_palette out_palette; - validate_info vi; - - /* Check for row overwrite errors */ - store_image_check(dp->this.ps, pp, 0); - - /* Supply the input and output sample depths here - 8 for an indexed image, - * otherwise the bit depth. - */ - init_validate_info(&vi, dp, pp, in_ct==3?8:in_bd, out_ct==3?8:out_bd); - - processing = (vi.gamma_correction > 0 && !dp->threshold_test) - || in_bd != out_bd || in_ct != out_ct || vi.do_background; - - /* TODO: FIX THIS: MAJOR BUG! If the transformations all happen inside - * the palette there is no way of finding out, because libpng fails to - * update the palette on png_read_update_info. Indeed, libpng doesn't - * even do the required work until much later, when it doesn't have any - * info pointer. Oops. For the moment 'processing' is turned off if - * out_ct is palette. - */ - if (in_ct == 3 && out_ct == 3) - processing = 0; - - if (processing && out_ct == 3) - out_is_transparent = read_palette(out_palette, &out_npalette, pp, pi); - - for (y=0; y<h; ++y) - { - png_const_bytep pRow = store_image_row(ps, pp, 0, y); - png_byte std[STANDARD_ROWMAX]; - - transform_row(pp, std, in_ct, in_bd, y); - - if (processing) - { - unsigned int x; - - for (x=0; x<w; ++x) - { - double alpha = 1; /* serves as a flag value */ - - /* Record the palette index for index images. */ - PNG_CONST unsigned int in_index = - in_ct == 3 ? sample(std, 3, in_bd, x, 0) : 256; - PNG_CONST unsigned int out_index = - out_ct == 3 ? sample(std, 3, out_bd, x, 0) : 256; - - /* Handle input alpha - png_set_background will cause the output - * alpha to disappear so there is nothing to check. - */ - if ((in_ct & PNG_COLOR_MASK_ALPHA) != 0 || (in_ct == 3 && - in_is_transparent)) - { - PNG_CONST unsigned int input_alpha = in_ct == 3 ? - dp->this.palette[in_index].alpha : - sample(std, in_ct, in_bd, x, samples_per_pixel); - - unsigned int output_alpha = 65536 /* as a flag value */; - - if (out_ct == 3) - { - if (out_is_transparent) - output_alpha = out_palette[out_index].alpha; - } - - else if ((out_ct & PNG_COLOR_MASK_ALPHA) != 0) - output_alpha = sample(pRow, out_ct, out_bd, x, - samples_per_pixel); - - if (output_alpha != 65536) - alpha = gamma_component_validate("alpha", &vi, input_alpha, - output_alpha, -1/*alpha*/, 0/*background*/); - - else /* no alpha in output */ - { - /* This is a copy of the calculation of 'i' above in order to - * have the alpha value to use in the background calculation. - */ - alpha = input_alpha >> vi.isbit_shift; - alpha /= vi.sbit_max; - } - } - - /* Handle grayscale or RGB components. */ - if ((in_ct & PNG_COLOR_MASK_COLOR) == 0) /* grayscale */ - (void)gamma_component_validate("gray", &vi, - sample(std, in_ct, in_bd, x, 0), - sample(pRow, out_ct, out_bd, x, 0), alpha/*component*/, - vi.background_red); - else /* RGB or palette */ - { - (void)gamma_component_validate("red", &vi, - in_ct == 3 ? in_palette[in_index].red : - sample(std, in_ct, in_bd, x, 0), - out_ct == 3 ? out_palette[out_index].red : - sample(pRow, out_ct, out_bd, x, 0), - alpha/*component*/, vi.background_red); - - (void)gamma_component_validate("green", &vi, - in_ct == 3 ? in_palette[in_index].green : - sample(std, in_ct, in_bd, x, 1), - out_ct == 3 ? out_palette[out_index].green : - sample(pRow, out_ct, out_bd, x, 1), - alpha/*component*/, vi.background_green); - - (void)gamma_component_validate("blue", &vi, - in_ct == 3 ? in_palette[in_index].blue : - sample(std, in_ct, in_bd, x, 2), - out_ct == 3 ? out_palette[out_index].blue : - sample(pRow, out_ct, out_bd, x, 2), - alpha/*component*/, vi.background_blue); - } - } - } - - else if (memcmp(std, pRow, cbRow) != 0) - { - char msg[64]; - - /* No transform is expected on the threshold tests. */ - sprintf(msg, "gamma: below threshold row %lu changed", - (unsigned long)y); - - png_error(pp, msg); - } - } /* row (y) loop */ - - dp->this.ps->validated = 1; -} - -static void PNGCBAPI -gamma_end(png_structp ppIn, png_infop pi) -{ - png_const_structp pp = ppIn; - gamma_display *dp = voidcast(gamma_display*, png_get_progressive_ptr(pp)); - - if (!dp->this.speed) - gamma_image_validate(dp, pp, pi); - else - dp->this.ps->validated = 1; -} - -/* A single test run checking a gamma transformation. - * - * maxabs: maximum absolute error as a fraction - * maxout: maximum output error in the output units - * maxpc: maximum percentage error (as a percentage) - */ -static void -gamma_test(png_modifier *pmIn, PNG_CONST png_byte colour_typeIn, - PNG_CONST png_byte bit_depthIn, PNG_CONST int palette_numberIn, - PNG_CONST int interlace_typeIn, - PNG_CONST double file_gammaIn, PNG_CONST double screen_gammaIn, - PNG_CONST png_byte sbitIn, PNG_CONST int threshold_testIn, - PNG_CONST char *name, - PNG_CONST int use_input_precisionIn, PNG_CONST int scale16In, - PNG_CONST int expand16In, PNG_CONST int do_backgroundIn, - PNG_CONST png_color_16 *bkgd_colorIn, double bkgd_gammaIn) -{ - gamma_display d; - context(&pmIn->this, fault); - - gamma_display_init(&d, pmIn, FILEID(colour_typeIn, bit_depthIn, - palette_numberIn, interlace_typeIn, 0, 0, 0), - file_gammaIn, screen_gammaIn, sbitIn, - threshold_testIn, use_input_precisionIn, scale16In, - expand16In, do_backgroundIn, bkgd_colorIn, bkgd_gammaIn); - - Try - { - png_structp pp; - png_infop pi; - gama_modification gama_mod; - srgb_modification srgb_mod; - sbit_modification sbit_mod; - - /* For the moment don't use the png_modifier support here. */ - d.pm->encoding_counter = 0; - modifier_set_encoding(d.pm); /* Just resets everything */ - d.pm->current_gamma = d.file_gamma; - - /* Make an appropriate modifier to set the PNG file gamma to the - * given gamma value and the sBIT chunk to the given precision. - */ - d.pm->modifications = NULL; - gama_modification_init(&gama_mod, d.pm, d.file_gamma); - srgb_modification_init(&srgb_mod, d.pm, 127 /*delete*/); - if (d.sbit > 0) - sbit_modification_init(&sbit_mod, d.pm, d.sbit); - - modification_reset(d.pm->modifications); - - /* Get a png_struct for writing the image. */ - pp = set_modifier_for_read(d.pm, &pi, d.this.id, name); - standard_palette_init(&d.this); - - /* Introduce the correct read function. */ - if (d.pm->this.progressive) - { - /* Share the row function with the standard implementation. */ - png_set_progressive_read_fn(pp, &d, gamma_info, progressive_row, - gamma_end); - - /* Now feed data into the reader until we reach the end: */ - modifier_progressive_read(d.pm, pp, pi); - } - else - { - /* modifier_read expects a png_modifier* */ - png_set_read_fn(pp, d.pm, modifier_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* Process the 'info' requirements. Only one image is generated */ - gamma_info_imp(&d, pp, pi); - - sequential_row(&d.this, pp, pi, -1, 0); - - if (!d.this.speed) - gamma_image_validate(&d, pp, pi); - else - d.this.ps->validated = 1; - } - - modifier_reset(d.pm); - - if (d.pm->log && !d.threshold_test && !d.this.speed) - fprintf(stderr, "%d bit %s %s: max error %f (%.2g, %2g%%)\n", - d.this.bit_depth, colour_types[d.this.colour_type], name, - d.maxerrout, d.maxerrabs, 100*d.maxerrpc); - - /* Log the summary values too. */ - if (d.this.colour_type == 0 || d.this.colour_type == 4) - { - switch (d.this.bit_depth) - { - case 1: - break; - - case 2: - if (d.maxerrout > d.pm->error_gray_2) - d.pm->error_gray_2 = d.maxerrout; - - break; - - case 4: - if (d.maxerrout > d.pm->error_gray_4) - d.pm->error_gray_4 = d.maxerrout; - - break; - - case 8: - if (d.maxerrout > d.pm->error_gray_8) - d.pm->error_gray_8 = d.maxerrout; - - break; - - case 16: - if (d.maxerrout > d.pm->error_gray_16) - d.pm->error_gray_16 = d.maxerrout; - - break; - - default: - png_error(pp, "bad bit depth (internal: 1)"); - } - } - - else if (d.this.colour_type == 2 || d.this.colour_type == 6) - { - switch (d.this.bit_depth) - { - case 8: - - if (d.maxerrout > d.pm->error_color_8) - d.pm->error_color_8 = d.maxerrout; - - break; - - case 16: - - if (d.maxerrout > d.pm->error_color_16) - d.pm->error_color_16 = d.maxerrout; - - break; - - default: - png_error(pp, "bad bit depth (internal: 2)"); - } - } - - else if (d.this.colour_type == 3) - { - if (d.maxerrout > d.pm->error_indexed) - d.pm->error_indexed = d.maxerrout; - } - } - - Catch(fault) - modifier_reset(voidcast(png_modifier*,(void*)fault)); -} - -static void gamma_threshold_test(png_modifier *pm, png_byte colour_type, - png_byte bit_depth, int interlace_type, double file_gamma, - double screen_gamma) -{ - size_t pos = 0; - char name[64]; - pos = safecat(name, sizeof name, pos, "threshold "); - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "/"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - (void)gamma_test(pm, colour_type, bit_depth, 0/*palette*/, interlace_type, - file_gamma, screen_gamma, 0/*sBIT*/, 1/*threshold test*/, name, - 0 /*no input precision*/, - 0 /*no scale16*/, 0 /*no expand16*/, 0 /*no background*/, 0 /*hence*/, - 0 /*no background gamma*/); -} - -static void -perform_gamma_threshold_tests(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - /* Don't test more than one instance of each palette - it's pointless, in - * fact this test is somewhat excessive since libpng doesn't make this - * decision based on colour type or bit depth! - */ - while (next_format(&colour_type, &bit_depth, &palette_number, 1/*gamma*/)) - if (palette_number == 0) - { - double test_gamma = 1.0; - while (test_gamma >= .4) - { - /* There's little point testing the interlacing vs non-interlacing, - * but this can be set from the command line. - */ - gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, - test_gamma, 1/test_gamma); - test_gamma *= .95; - } - - /* And a special test for sRGB */ - gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, - .45455, 2.2); - - if (fail(pm)) - return; - } -} - -static void gamma_transform_test(png_modifier *pm, - PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth, - PNG_CONST int palette_number, - PNG_CONST int interlace_type, PNG_CONST double file_gamma, - PNG_CONST double screen_gamma, PNG_CONST png_byte sbit, - PNG_CONST int use_input_precision, PNG_CONST int scale16) -{ - size_t pos = 0; - char name[64]; - - if (sbit != bit_depth && sbit != 0) - { - pos = safecat(name, sizeof name, pos, "sbit("); - pos = safecatn(name, sizeof name, pos, sbit); - pos = safecat(name, sizeof name, pos, ") "); - } - - else - pos = safecat(name, sizeof name, pos, "gamma "); - - if (scale16) - pos = safecat(name, sizeof name, pos, "16to8 "); - - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "->"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - gamma_test(pm, colour_type, bit_depth, palette_number, interlace_type, - file_gamma, screen_gamma, sbit, 0, name, use_input_precision, - scale16, pm->test_gamma_expand16, 0 , 0, 0); -} - -static void perform_gamma_transform_tests(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - while (next_format(&colour_type, &bit_depth, &palette_number, 1/*gamma*/)) - { - unsigned int i, j; - - for (i=0; i<pm->ngamma_tests; ++i) for (j=0; j<pm->ngamma_tests; ++j) - if (i != j) - { - gamma_transform_test(pm, colour_type, bit_depth, palette_number, - pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], 0/*sBIT*/, - pm->use_input_precision, 0 /*do not scale16*/); - - if (fail(pm)) - return; - } - } -} - -static void perform_gamma_sbit_tests(png_modifier *pm) -{ - png_byte sbit; - - /* The only interesting cases are colour and grayscale, alpha is ignored here - * for overall speed. Only bit depths where sbit is less than the bit depth - * are tested. - */ - for (sbit=pm->sbitlow; sbit<(1<<READ_BDHI); ++sbit) - { - png_byte colour_type = 0, bit_depth = 0; - unsigned int npalette = 0; - - while (next_format(&colour_type, &bit_depth, &npalette, 1/*gamma*/)) - if ((colour_type & PNG_COLOR_MASK_ALPHA) == 0 && - ((colour_type == 3 && sbit < 8) || - (colour_type != 3 && sbit < bit_depth))) - { - unsigned int i; - - for (i=0; i<pm->ngamma_tests; ++i) - { - unsigned int j; - - for (j=0; j<pm->ngamma_tests; ++j) if (i != j) - { - gamma_transform_test(pm, colour_type, bit_depth, npalette, - pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], - sbit, pm->use_input_precision_sbit, 0 /*scale16*/); - - if (fail(pm)) - return; - } - } - } - } -} - -/* Note that this requires a 16 bit source image but produces 8 bit output, so - * we only need the 16bit write support, but the 16 bit images are only - * generated if DO_16BIT is defined. - */ -#ifdef DO_16BIT -static void perform_gamma_scale16_tests(png_modifier *pm) -{ -# ifndef PNG_MAX_GAMMA_8 -# define PNG_MAX_GAMMA_8 11 -# endif -# define SBIT_16_TO_8 PNG_MAX_GAMMA_8 - /* Include the alpha cases here. Note that sbit matches the internal value - * used by the library - otherwise we will get spurious errors from the - * internal sbit style approximation. - * - * The threshold test is here because otherwise the 16 to 8 conversion will - * proceed *without* gamma correction, and the tests above will fail (but not - * by much) - this could be fixed, it only appears with the -g option. - */ - unsigned int i, j; - for (i=0; i<pm->ngamma_tests; ++i) - { - for (j=0; j<pm->ngamma_tests; ++j) - { - if (i != j && - fabs(pm->gammas[j]/pm->gammas[i]-1) >= PNG_GAMMA_THRESHOLD) - { - gamma_transform_test(pm, 0, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 2, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 4, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 6, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - } - } - } -} -#endif /* 16 to 8 bit conversion */ - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) -static void gamma_composition_test(png_modifier *pm, - PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth, - PNG_CONST int palette_number, - PNG_CONST int interlace_type, PNG_CONST double file_gamma, - PNG_CONST double screen_gamma, - PNG_CONST int use_input_precision, PNG_CONST int do_background, - PNG_CONST int expand_16) -{ - size_t pos = 0; - png_const_charp base; - double bg; - char name[128]; - png_color_16 background; - - /* Make up a name and get an appropriate background gamma value. */ - switch (do_background) - { - default: - base = ""; - bg = 4; /* should not be used */ - break; - case PNG_BACKGROUND_GAMMA_SCREEN: - base = " bckg(Screen):"; - bg = 1/screen_gamma; - break; - case PNG_BACKGROUND_GAMMA_FILE: - base = " bckg(File):"; - bg = file_gamma; - break; - case PNG_BACKGROUND_GAMMA_UNIQUE: - base = " bckg(Unique):"; - /* This tests the handling of a unique value, the math is such that the - * value tends to be <1, but is neither screen nor file (even if they - * match!) - */ - bg = (file_gamma + screen_gamma) / 3; - break; -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - case ALPHA_MODE_OFFSET + PNG_ALPHA_PNG: - base = " alpha(PNG)"; - bg = 4; /* should not be used */ - break; - case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: - base = " alpha(Porter-Duff)"; - bg = 4; /* should not be used */ - break; - case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: - base = " alpha(Optimized)"; - bg = 4; /* should not be used */ - break; - case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: - base = " alpha(Broken)"; - bg = 4; /* should not be used */ - break; -#endif - } - - /* Use random background values - the background is always presented in the - * output space (8 or 16 bit components). - */ - if (expand_16 || bit_depth == 16) - { - png_uint_32 r = random_32(); - - background.red = (png_uint_16)r; - background.green = (png_uint_16)(r >> 16); - r = random_32(); - background.blue = (png_uint_16)r; - background.gray = (png_uint_16)(r >> 16); - - /* In earlier libpng versions, those where DIGITIZE is set, any background - * gamma correction in the expand16 case was done using 8-bit gamma - * correction tables, resulting in larger errors. To cope with those - * cases use a 16-bit background value which will handle this gamma - * correction. - */ -# if DIGITIZE - if (expand_16 && (do_background == PNG_BACKGROUND_GAMMA_UNIQUE || - do_background == PNG_BACKGROUND_GAMMA_FILE) && - fabs(bg*screen_gamma-1) > PNG_GAMMA_THRESHOLD) - { - /* The background values will be looked up in an 8-bit table to do - * the gamma correction, so only select values which are an exact - * match for the 8-bit table entries: - */ - background.red = (png_uint_16)((background.red >> 8) * 257); - background.green = (png_uint_16)((background.green >> 8) * 257); - background.blue = (png_uint_16)((background.blue >> 8) * 257); - background.gray = (png_uint_16)((background.gray >> 8) * 257); - } -# endif - } - - else /* 8 bit colors */ - { - png_uint_32 r = random_32(); - - background.red = (png_byte)r; - background.green = (png_byte)(r >> 8); - background.blue = (png_byte)(r >> 16); - background.gray = (png_byte)(r >> 24); - } - - background.index = 193; /* rgb(193,193,193) to detect errors */ - if (!(colour_type & PNG_COLOR_MASK_COLOR)) - { - /* Grayscale input, we do not convert to RGB (TBD), so we must set the - * background to gray - else libpng seems to fail. - */ - background.red = background.green = background.blue = background.gray; - } - - pos = safecat(name, sizeof name, pos, "gamma "); - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "->"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - pos = safecat(name, sizeof name, pos, base); - if (do_background < ALPHA_MODE_OFFSET) - { - /* Include the background color and gamma in the name: */ - pos = safecat(name, sizeof name, pos, "("); - /* This assumes no expand gray->rgb - the current code won't handle that! - */ - if (colour_type & PNG_COLOR_MASK_COLOR) - { - pos = safecatn(name, sizeof name, pos, background.red); - pos = safecat(name, sizeof name, pos, ","); - pos = safecatn(name, sizeof name, pos, background.green); - pos = safecat(name, sizeof name, pos, ","); - pos = safecatn(name, sizeof name, pos, background.blue); - } - else - pos = safecatn(name, sizeof name, pos, background.gray); - pos = safecat(name, sizeof name, pos, ")^"); - pos = safecatd(name, sizeof name, pos, bg, 3); - } - - gamma_test(pm, colour_type, bit_depth, palette_number, interlace_type, - file_gamma, screen_gamma, 0/*sBIT*/, 0, name, use_input_precision, - 0/*strip 16*/, expand_16, do_background, &background, bg); -} - - -static void -perform_gamma_composition_tests(png_modifier *pm, int do_background, - int expand_16) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - /* Skip the non-alpha cases - there is no setting of a transparency colour at - * present. - */ - while (next_format(&colour_type, &bit_depth, &palette_number, 1/*gamma*/)) - if ((colour_type & PNG_COLOR_MASK_ALPHA) != 0) - { - unsigned int i, j; - - /* Don't skip the i==j case here - it's relevant. */ - for (i=0; i<pm->ngamma_tests; ++i) for (j=0; j<pm->ngamma_tests; ++j) - { - gamma_composition_test(pm, colour_type, bit_depth, palette_number, - pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], - pm->use_input_precision, do_background, expand_16); - - if (fail(pm)) - return; - } - } -} -#endif /* READ_BACKGROUND || READ_ALPHA_MODE */ - -static void -init_gamma_errors(png_modifier *pm) -{ - /* Use -1 to catch tests that were not actually run */ - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = -1.; - pm->error_color_8 = -1.; - pm->error_indexed = -1.; - pm->error_gray_16 = pm->error_color_16 = -1.; -} - -static void -print_one(const char *leader, double err) -{ - if (err != -1.) - printf(" %s %.5f\n", leader, err); -} - -static void -summarize_gamma_errors(png_modifier *pm, png_const_charp who, int low_bit_depth, - int indexed) -{ - fflush(stderr); - - if (who) - printf("\nGamma correction with %s:\n", who); - - else - printf("\nBasic gamma correction:\n"); - - if (low_bit_depth) - { - print_one(" 2 bit gray: ", pm->error_gray_2); - print_one(" 4 bit gray: ", pm->error_gray_4); - print_one(" 8 bit gray: ", pm->error_gray_8); - print_one(" 8 bit color:", pm->error_color_8); - if (indexed) - print_one(" indexed: ", pm->error_indexed); - } - - print_one("16 bit gray: ", pm->error_gray_16); - print_one("16 bit color:", pm->error_color_16); - - fflush(stdout); -} - -static void -perform_gamma_test(png_modifier *pm, int summary) -{ - /*TODO: remove this*/ - /* Save certain values for the temporary overrides below. */ - unsigned int calculations_use_input_precision = - pm->calculations_use_input_precision; -# ifdef PNG_READ_BACKGROUND_SUPPORTED - double maxout8 = pm->maxout8; -# endif - - /* First some arbitrary no-transform tests: */ - if (!pm->this.speed && pm->test_gamma_threshold) - { - perform_gamma_threshold_tests(pm); - - if (fail(pm)) - return; - } - - /* Now some real transforms. */ - if (pm->test_gamma_transform) - { - if (summary) - { - fflush(stderr); - printf("Gamma correction error summary\n\n"); - printf("The printed value is the maximum error in the pixel values\n"); - printf("calculated by the libpng gamma correction code. The error\n"); - printf("is calculated as the difference between the output pixel\n"); - printf("value (always an integer) and the ideal value from the\n"); - printf("libpng specification (typically not an integer).\n\n"); - - printf("Expect this value to be less than .5 for 8 bit formats,\n"); - printf("less than 1 for formats with fewer than 8 bits and a small\n"); - printf("number (typically less than 5) for the 16 bit formats.\n"); - printf("For performance reasons the value for 16 bit formats\n"); - printf("increases when the image file includes an sBIT chunk.\n"); - fflush(stdout); - } - - init_gamma_errors(pm); - /*TODO: remove this. Necessary because the current libpng - * implementation works in 8 bits: - */ - if (pm->test_gamma_expand16) - pm->calculations_use_input_precision = 1; - perform_gamma_transform_tests(pm); - if (!calculations_use_input_precision) - pm->calculations_use_input_precision = 0; - - if (summary) - summarize_gamma_errors(pm, 0/*who*/, 1/*low bit depth*/, 1/*indexed*/); - - if (fail(pm)) - return; - } - - /* The sbit tests produce much larger errors: */ - if (pm->test_gamma_sbit) - { - init_gamma_errors(pm); - perform_gamma_sbit_tests(pm); - - if (summary) - summarize_gamma_errors(pm, "sBIT", pm->sbitlow < 8U, 1/*indexed*/); - - if (fail(pm)) - return; - } - -#ifdef DO_16BIT /* Should be READ_16BIT_SUPPORTED */ - if (pm->test_gamma_scale16) - { - /* The 16 to 8 bit strip operations: */ - init_gamma_errors(pm); - perform_gamma_scale16_tests(pm); - - if (summary) - { - fflush(stderr); - printf("\nGamma correction with 16 to 8 bit reduction:\n"); - printf(" 16 bit gray: %.5f\n", pm->error_gray_16); - printf(" 16 bit color: %.5f\n", pm->error_color_16); - fflush(stdout); - } - - if (fail(pm)) - return; - } -#endif - -#ifdef PNG_READ_BACKGROUND_SUPPORTED - if (pm->test_gamma_background) - { - init_gamma_errors(pm); - - /*TODO: remove this. Necessary because the current libpng - * implementation works in 8 bits: - */ - if (pm->test_gamma_expand16) - { - pm->calculations_use_input_precision = 1; - pm->maxout8 = .499; /* because the 16 bit background is smashed */ - } - perform_gamma_composition_tests(pm, PNG_BACKGROUND_GAMMA_UNIQUE, - pm->test_gamma_expand16); - if (!calculations_use_input_precision) - pm->calculations_use_input_precision = 0; - pm->maxout8 = maxout8; - - if (summary) - summarize_gamma_errors(pm, "background", 1, 0/*indexed*/); - - if (fail(pm)) - return; - } -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - if (pm->test_gamma_alpha_mode) - { - int do_background; - - init_gamma_errors(pm); - - /*TODO: remove this. Necessary because the current libpng - * implementation works in 8 bits: - */ - if (pm->test_gamma_expand16) - pm->calculations_use_input_precision = 1; - for (do_background = ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD; - do_background <= ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN && !fail(pm); - ++do_background) - perform_gamma_composition_tests(pm, do_background, - pm->test_gamma_expand16); - if (!calculations_use_input_precision) - pm->calculations_use_input_precision = 0; - - if (summary) - summarize_gamma_errors(pm, "alpha mode", 1, 0/*indexed*/); - - if (fail(pm)) - return; - } -#endif -} -#endif /* PNG_READ_GAMMA_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED */ - -/* INTERLACE MACRO VALIDATION */ -/* This is copied verbatim from the specification, it is simply the pass - * number in which each pixel in each 8x8 tile appears. The array must - * be indexed adam7[y][x] and notice that the pass numbers are based at - * 1, not 0 - the base libpng uses. - */ -static PNG_CONST -png_byte adam7[8][8] = -{ - { 1,6,4,6,2,6,4,6 }, - { 7,7,7,7,7,7,7,7 }, - { 5,6,5,6,5,6,5,6 }, - { 7,7,7,7,7,7,7,7 }, - { 3,6,4,6,3,6,4,6 }, - { 7,7,7,7,7,7,7,7 }, - { 5,6,5,6,5,6,5,6 }, - { 7,7,7,7,7,7,7,7 } -}; - -/* This routine validates all the interlace support macros in png.h for - * a variety of valid PNG widths and heights. It uses a number of similarly - * named internal routines that feed off the above array. - */ -static png_uint_32 -png_pass_start_row(int pass) -{ - int x, y; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - return y; - return 0xf; -} - -static png_uint_32 -png_pass_start_col(int pass) -{ - int x, y; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - return x; - return 0xf; -} - -static int -png_pass_row_shift(int pass) -{ - int x, y, base=(-1), inc=8; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - { - if (base == (-1)) - base = y; - else if (base == y) - {} - else if (inc == y-base) - base=y; - else if (inc == 8) - inc = y-base, base=y; - else if (inc != y-base) - return 0xff; /* error - more than one 'inc' value! */ - } - - if (base == (-1)) return 0xfe; /* error - no row in pass! */ - - /* The shift is always 1, 2 or 3 - no pass has all the rows! */ - switch (inc) - { -case 2: return 1; -case 4: return 2; -case 8: return 3; -default: break; - } - - /* error - unrecognized 'inc' */ - return (inc << 8) + 0xfd; -} - -static int -png_pass_col_shift(int pass) -{ - int x, y, base=(-1), inc=8; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - { - if (base == (-1)) - base = x; - else if (base == x) - {} - else if (inc == x-base) - base=x; - else if (inc == 8) - inc = x-base, base=x; - else if (inc != x-base) - return 0xff; /* error - more than one 'inc' value! */ - } - - if (base == (-1)) return 0xfe; /* error - no row in pass! */ - - /* The shift is always 1, 2 or 3 - no pass has all the rows! */ - switch (inc) - { -case 1: return 0; /* pass 7 has all the columns */ -case 2: return 1; -case 4: return 2; -case 8: return 3; -default: break; - } - - /* error - unrecognized 'inc' */ - return (inc << 8) + 0xfd; -} - -static png_uint_32 -png_row_from_pass_row(png_uint_32 yIn, int pass) -{ - /* By examination of the array: */ - switch (pass) - { -case 0: return yIn * 8; -case 1: return yIn * 8; -case 2: return yIn * 8 + 4; -case 3: return yIn * 4; -case 4: return yIn * 4 + 2; -case 5: return yIn * 2; -case 6: return yIn * 2 + 1; -default: break; - } - - return 0xff; /* bad pass number */ -} - -static png_uint_32 -png_col_from_pass_col(png_uint_32 xIn, int pass) -{ - /* By examination of the array: */ - switch (pass) - { -case 0: return xIn * 8; -case 1: return xIn * 8 + 4; -case 2: return xIn * 4; -case 3: return xIn * 4 + 2; -case 4: return xIn * 2; -case 5: return xIn * 2 + 1; -case 6: return xIn; -default: break; - } - - return 0xff; /* bad pass number */ -} - -static int -png_row_in_interlace_pass(png_uint_32 y, int pass) -{ - /* Is row 'y' in pass 'pass'? */ - int x; - y &= 7; - ++pass; - for (x=0; x<8; ++x) if (adam7[y][x] == pass) - return 1; - - return 0; -} - -static int -png_col_in_interlace_pass(png_uint_32 x, int pass) -{ - /* Is column 'x' in pass 'pass'? */ - int y; - x &= 7; - ++pass; - for (y=0; y<8; ++y) if (adam7[y][x] == pass) - return 1; - - return 0; -} - -static png_uint_32 -png_pass_rows(png_uint_32 height, int pass) -{ - png_uint_32 tiles = height>>3; - png_uint_32 rows = 0; - unsigned int x, y; - - height &= 7; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - { - rows += tiles; - if (y < height) ++rows; - break; /* i.e. break the 'x', column, loop. */ - } - - return rows; -} - -static png_uint_32 -png_pass_cols(png_uint_32 width, int pass) -{ - png_uint_32 tiles = width>>3; - png_uint_32 cols = 0; - unsigned int x, y; - - width &= 7; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - { - cols += tiles; - if (x < width) ++cols; - break; /* i.e. break the 'y', row, loop. */ - } - - return cols; -} - -static void -perform_interlace_macro_validation(void) -{ - /* The macros to validate, first those that depend only on pass: - * - * PNG_PASS_START_ROW(pass) - * PNG_PASS_START_COL(pass) - * PNG_PASS_ROW_SHIFT(pass) - * PNG_PASS_COL_SHIFT(pass) - */ - int pass; - - for (pass=0; pass<7; ++pass) - { - png_uint_32 m, f, v; - - m = PNG_PASS_START_ROW(pass); - f = png_pass_start_row(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_START_ROW(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - m = PNG_PASS_START_COL(pass); - f = png_pass_start_col(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_START_COL(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - m = PNG_PASS_ROW_SHIFT(pass); - f = png_pass_row_shift(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_ROW_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - m = PNG_PASS_COL_SHIFT(pass); - f = png_pass_col_shift(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_COL_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - /* Macros that depend on the image or sub-image height too: - * - * PNG_PASS_ROWS(height, pass) - * PNG_PASS_COLS(width, pass) - * PNG_ROW_FROM_PASS_ROW(yIn, pass) - * PNG_COL_FROM_PASS_COL(xIn, pass) - * PNG_ROW_IN_INTERLACE_PASS(y, pass) - * PNG_COL_IN_INTERLACE_PASS(x, pass) - */ - for (v=0;;) - { - /* First the base 0 stuff: */ - m = PNG_ROW_FROM_PASS_ROW(v, pass); - f = png_row_from_pass_row(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_ROW_FROM_PASS_ROW(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - m = PNG_COL_FROM_PASS_COL(v, pass); - f = png_col_from_pass_col(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_COL_FROM_PASS_COL(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - m = PNG_ROW_IN_INTERLACE_PASS(v, pass); - f = png_row_in_interlace_pass(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_ROW_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - m = PNG_COL_IN_INTERLACE_PASS(v, pass); - f = png_col_in_interlace_pass(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_COL_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - /* Then the base 1 stuff: */ - ++v; - m = PNG_PASS_ROWS(v, pass); - f = png_pass_rows(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_ROWS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - m = PNG_PASS_COLS(v, pass); - f = png_pass_cols(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_COLS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - /* Move to the next v - the stepping algorithm starts skipping - * values above 1024. - */ - if (v > 1024) - { - if (v == PNG_UINT_31_MAX) - break; - - v = (v << 1) ^ v; - if (v >= PNG_UINT_31_MAX) - v = PNG_UINT_31_MAX-1; - } - } - } -} - -/* Test color encodings. These values are back-calculated from the published - * chromaticities. The values are accurate to about 14 decimal places; 15 are - * given. These values are much more accurate than the ones given in the spec, - * which typically don't exceed 4 decimal places. This allows testing of the - * libpng code to its theoretical accuracy of 4 decimal places. (If pngvalid - * used the published errors the 'slack' permitted would have to be +/-.5E-4 or - * more.) - * - * The png_modifier code assumes that encodings[0] is sRGB and treats it - * specially: do not change the first entry in this list! - */ -static PNG_CONST color_encoding test_encodings[] = -{ -/* sRGB: must be first in this list! */ -/*gamma:*/ { 1/2.2, -/*red: */ { 0.412390799265959, 0.212639005871510, 0.019330818715592 }, -/*green:*/ { 0.357584339383878, 0.715168678767756, 0.119194779794626 }, -/*blue: */ { 0.180480788401834, 0.072192315360734, 0.950532152249660} }, -/* Kodak ProPhoto (wide gamut) */ -/*gamma:*/ { 1/1.6 /*approximate: uses 1.8 power law compared to sRGB 2.4*/, -/*red: */ { 0.797760489672303, 0.288071128229293, 0.000000000000000 }, -/*green:*/ { 0.135185837175740, 0.711843217810102, 0.000000000000000 }, -/*blue: */ { 0.031349349581525, 0.000085653960605, 0.825104602510460} }, -/* Adobe RGB (1998) */ -/*gamma:*/ { 1/(2+51./256), -/*red: */ { 0.576669042910131, 0.297344975250536, 0.027031361386412 }, -/*green:*/ { 0.185558237906546, 0.627363566255466, 0.070688852535827 }, -/*blue: */ { 0.188228646234995, 0.075291458493998, 0.991337536837639} }, -/* Adobe Wide Gamut RGB */ -/*gamma:*/ { 1/(2+51./256), -/*red: */ { 0.716500716779386, 0.258728243040113, 0.000000000000000 }, -/*green:*/ { 0.101020574397477, 0.724682314948566, 0.051211818965388 }, -/*blue: */ { 0.146774385252705, 0.016589442011321, 0.773892783545073} }, -}; - -/* signal handler - * - * This attempts to trap signals and escape without crashing. It needs a - * context pointer so that it can throw an exception (call longjmp) to recover - * from the condition; this is handled by making the png_modifier used by 'main' - * into a global variable. - */ -static png_modifier pm; - -static void signal_handler(int signum) -{ - - size_t pos = 0; - char msg[64]; - - pos = safecat(msg, sizeof msg, pos, "caught signal: "); - - switch (signum) - { - case SIGABRT: - pos = safecat(msg, sizeof msg, pos, "abort"); - break; - - case SIGFPE: - pos = safecat(msg, sizeof msg, pos, "floating point exception"); - break; - - case SIGILL: - pos = safecat(msg, sizeof msg, pos, "illegal instruction"); - break; - - case SIGINT: - pos = safecat(msg, sizeof msg, pos, "interrupt"); - break; - - case SIGSEGV: - pos = safecat(msg, sizeof msg, pos, "invalid memory access"); - break; - - case SIGTERM: - pos = safecat(msg, sizeof msg, pos, "termination request"); - break; - - default: - pos = safecat(msg, sizeof msg, pos, "unknown "); - pos = safecatn(msg, sizeof msg, pos, signum); - break; - } - - store_log(&pm.this, NULL/*png_structp*/, msg, 1/*error*/); - - /* And finally throw an exception so we can keep going, unless this is - * SIGTERM in which case stop now. - */ - if (signum != SIGTERM) - { - struct exception_context *the_exception_context = - &pm.this.exception_context; - - Throw &pm.this; - } - - else - exit(1); -} - -/* main program */ -int main(int argc, char **argv) -{ - volatile int summary = 1; /* Print the error summary at the end */ - volatile int memstats = 0; /* Print memory statistics at the end */ - - /* Create the given output file on success: */ - PNG_CONST char *volatile touch = NULL; - - /* This is an array of standard gamma values (believe it or not I've seen - * every one of these mentioned somewhere.) - * - * In the following list the most useful values are first! - */ - static double - gammas[]={2.2, 1.0, 2.2/1.45, 1.8, 1.5, 2.4, 2.5, 2.62, 2.9}; - - /* This records the command and arguments: */ - size_t cp = 0; - char command[1024]; - - anon_context(&pm.this); - - /* Add appropriate signal handlers, just the ANSI specified ones: */ - signal(SIGABRT, signal_handler); - signal(SIGFPE, signal_handler); - signal(SIGILL, signal_handler); - signal(SIGINT, signal_handler); - signal(SIGSEGV, signal_handler); - signal(SIGTERM, signal_handler); - -#ifdef HAVE_FEENABLEEXCEPT - /* Only required to enable FP exceptions on platforms where they start off - * disabled; this is not necessary but if it is not done pngvalid will likely - * end up ignoring FP conditions that other platforms fault. - */ - feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW); -#endif - - modifier_init(&pm); - - /* Preallocate the image buffer, because we know how big it needs to be, - * note that, for testing purposes, it is deliberately mis-aligned by tag - * bytes either side. All rows have an additional five bytes of padding for - * overwrite checking. - */ - store_ensure_image(&pm.this, NULL, 2, TRANSFORM_ROWMAX, TRANSFORM_HEIGHTMAX); - - /* Don't give argv[0], it's normally some horrible libtool string: */ - cp = safecat(command, sizeof command, cp, "pngvalid"); - - /* Default to error on warning: */ - pm.this.treat_warnings_as_errors = 1; - - /* Default assume_16_bit_calculations appropriately; this tells the checking - * code that 16-bit arithmetic is used for 8-bit samples when it would make a - * difference. - */ - pm.assume_16_bit_calculations = PNG_LIBPNG_VER >= 10700; - - /* Currently 16 bit expansion happens at the end of the pipeline, so the - * calculations are done in the input bit depth not the output. - * - * TODO: fix this - */ - pm.calculations_use_input_precision = 1U; - - /* Store the test gammas */ - pm.gammas = gammas; - pm.ngammas = ARRAY_SIZE(gammas); - pm.ngamma_tests = 0; /* default to off */ - - /* And the test encodings */ - pm.encodings = test_encodings; - pm.nencodings = ARRAY_SIZE(test_encodings); - - pm.sbitlow = 8U; /* because libpng doesn't do sBIT below 8! */ - - /* The following allows results to pass if they correspond to anything in the - * transformed range [input-.5,input+.5]; this is is required because of the - * way libpng treates the 16_TO_8 flag when building the gamma tables in - * releases up to 1.6.0. - * - * TODO: review this - */ - pm.use_input_precision_16to8 = 1U; - pm.use_input_precision_sbit = 1U; /* because libpng now rounds sBIT */ - - /* Some default values (set the behavior for 'make check' here). - * These values simply control the maximum error permitted in the gamma - * transformations. The practial limits for human perception are described - * below (the setting for maxpc16), however for 8 bit encodings it isn't - * possible to meet the accepted capabilities of human vision - i.e. 8 bit - * images can never be good enough, regardless of encoding. - */ - pm.maxout8 = .1; /* Arithmetic error in *encoded* value */ - pm.maxabs8 = .00005; /* 1/20000 */ - pm.maxcalc8 = 1./255; /* +/-1 in 8 bits for compose errors */ - pm.maxpc8 = .499; /* I.e., .499% fractional error */ - pm.maxout16 = .499; /* Error in *encoded* value */ - pm.maxabs16 = .00005;/* 1/20000 */ - pm.maxcalc16 =1./65535;/* +/-1 in 16 bits for compose errors */ - pm.maxcalcG = 1./((1<<PNG_MAX_GAMMA_8)-1); - - /* NOTE: this is a reasonable perceptual limit. We assume that humans can - * perceive light level differences of 1% over a 100:1 range, so we need to - * maintain 1 in 10000 accuracy (in linear light space), which is what the - * following guarantees. It also allows significantly higher errors at - * higher 16 bit values, which is important for performance. The actual - * maximum 16 bit error is about +/-1.9 in the fixed point implementation but - * this is only allowed for values >38149 by the following: - */ - pm.maxpc16 = .005; /* I.e., 1/200% - 1/20000 */ - - /* Now parse the command line options. */ - while (--argc >= 1) - { - int catmore = 0; /* Set if the argument has an argument. */ - - /* Record each argument for posterity: */ - cp = safecat(command, sizeof command, cp, " "); - cp = safecat(command, sizeof command, cp, *++argv); - - if (strcmp(*argv, "-v") == 0) - pm.this.verbose = 1; - - else if (strcmp(*argv, "-l") == 0) - pm.log = 1; - - else if (strcmp(*argv, "-q") == 0) - summary = pm.this.verbose = pm.log = 0; - - else if (strcmp(*argv, "-w") == 0) - pm.this.treat_warnings_as_errors = 0; - - else if (strcmp(*argv, "--speed") == 0) - pm.this.speed = 1, pm.ngamma_tests = pm.ngammas, pm.test_standard = 0, - summary = 0; - - else if (strcmp(*argv, "--memory") == 0) - memstats = 1; - - else if (strcmp(*argv, "--size") == 0) - pm.test_size = 1; - - else if (strcmp(*argv, "--nosize") == 0) - pm.test_size = 0; - - else if (strcmp(*argv, "--standard") == 0) - pm.test_standard = 1; - - else if (strcmp(*argv, "--nostandard") == 0) - pm.test_standard = 0; - - else if (strcmp(*argv, "--transform") == 0) - pm.test_transform = 1; - - else if (strcmp(*argv, "--notransform") == 0) - pm.test_transform = 0; - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - else if (strncmp(*argv, "--transform-disable=", - sizeof "--transform-disable") == 0) - { - pm.test_transform = 1; - transform_disable(*argv + sizeof "--transform-disable"); - } - - else if (strncmp(*argv, "--transform-enable=", - sizeof "--transform-enable") == 0) - { - pm.test_transform = 1; - transform_enable(*argv + sizeof "--transform-enable"); - } -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - - else if (strcmp(*argv, "--gamma") == 0) - { - /* Just do two gamma tests here (2.2 and linear) for speed: */ - pm.ngamma_tests = 2U; - pm.test_gamma_threshold = 1; - pm.test_gamma_transform = 1; - pm.test_gamma_sbit = 1; - pm.test_gamma_scale16 = 1; - pm.test_gamma_background = 1; - pm.test_gamma_alpha_mode = 1; - } - - else if (strcmp(*argv, "--nogamma") == 0) - pm.ngamma_tests = 0; - - else if (strcmp(*argv, "--gamma-threshold") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_threshold = 1; - - else if (strcmp(*argv, "--nogamma-threshold") == 0) - pm.test_gamma_threshold = 0; - - else if (strcmp(*argv, "--gamma-transform") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_transform = 1; - - else if (strcmp(*argv, "--nogamma-transform") == 0) - pm.test_gamma_transform = 0; - - else if (strcmp(*argv, "--gamma-sbit") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_sbit = 1; - - else if (strcmp(*argv, "--nogamma-sbit") == 0) - pm.test_gamma_sbit = 0; - - else if (strcmp(*argv, "--gamma-16-to-8") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_scale16 = 1; - - else if (strcmp(*argv, "--nogamma-16-to-8") == 0) - pm.test_gamma_scale16 = 0; - - else if (strcmp(*argv, "--gamma-background") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_background = 1; - - else if (strcmp(*argv, "--nogamma-background") == 0) - pm.test_gamma_background = 0; - - else if (strcmp(*argv, "--gamma-alpha-mode") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_alpha_mode = 1; - - else if (strcmp(*argv, "--nogamma-alpha-mode") == 0) - pm.test_gamma_alpha_mode = 0; - - else if (strcmp(*argv, "--expand16") == 0) - pm.test_gamma_expand16 = 1; - - else if (strcmp(*argv, "--noexpand16") == 0) - pm.test_gamma_expand16 = 0; - - else if (strcmp(*argv, "--more-gammas") == 0) - pm.ngamma_tests = 3U; - - else if (strcmp(*argv, "--all-gammas") == 0) - pm.ngamma_tests = pm.ngammas; - - else if (strcmp(*argv, "--progressive-read") == 0) - pm.this.progressive = 1; - - else if (strcmp(*argv, "--use-update-info") == 0) - ++pm.use_update_info; /* Can call multiple times */ - - else if (strcmp(*argv, "--interlace") == 0) - { -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - pm.interlace_type = PNG_INTERLACE_ADAM7; -# else - fprintf(stderr, "pngvalid: no write interlace support\n"); - return SKIP; -# endif - } - - else if (strcmp(*argv, "--use-input-precision") == 0) - pm.use_input_precision = 1U; - - else if (strcmp(*argv, "--use-calculation-precision") == 0) - pm.use_input_precision = 0; - - else if (strcmp(*argv, "--calculations-use-input-precision") == 0) - pm.calculations_use_input_precision = 1U; - - else if (strcmp(*argv, "--assume-16-bit-calculations") == 0) - pm.assume_16_bit_calculations = 1U; - - else if (strcmp(*argv, "--calculations-follow-bit-depth") == 0) - pm.calculations_use_input_precision = - pm.assume_16_bit_calculations = 0; - - else if (strcmp(*argv, "--exhaustive") == 0) - pm.test_exhaustive = 1; - - else if (argc > 1 && strcmp(*argv, "--sbitlow") == 0) - --argc, pm.sbitlow = (png_byte)atoi(*++argv), catmore = 1; - - else if (argc > 1 && strcmp(*argv, "--touch") == 0) - --argc, touch = *++argv, catmore = 1; - - else if (argc > 1 && strncmp(*argv, "--max", 5) == 0) - { - --argc; - - if (strcmp(5+*argv, "abs8") == 0) - pm.maxabs8 = atof(*++argv); - - else if (strcmp(5+*argv, "abs16") == 0) - pm.maxabs16 = atof(*++argv); - - else if (strcmp(5+*argv, "calc8") == 0) - pm.maxcalc8 = atof(*++argv); - - else if (strcmp(5+*argv, "calc16") == 0) - pm.maxcalc16 = atof(*++argv); - - else if (strcmp(5+*argv, "out8") == 0) - pm.maxout8 = atof(*++argv); - - else if (strcmp(5+*argv, "out16") == 0) - pm.maxout16 = atof(*++argv); - - else if (strcmp(5+*argv, "pc8") == 0) - pm.maxpc8 = atof(*++argv); - - else if (strcmp(5+*argv, "pc16") == 0) - pm.maxpc16 = atof(*++argv); - - else - { - fprintf(stderr, "pngvalid: %s: unknown 'max' option\n", *argv); - exit(99); - } - - catmore = 1; - } - - else if (strcmp(*argv, "--log8") == 0) - --argc, pm.log8 = atof(*++argv), catmore = 1; - - else if (strcmp(*argv, "--log16") == 0) - --argc, pm.log16 = atof(*++argv), catmore = 1; - -#ifdef PNG_SET_OPTION_SUPPORTED - else if (strncmp(*argv, "--option=", 9) == 0) - { - /* Syntax of the argument is <option>:{on|off} */ - const char *arg = 9+*argv; - unsigned char option=0, setting=0; - -#ifdef PNG_ARM_NEON_API_SUPPORTED - if (strncmp(arg, "arm-neon:", 9) == 0) - option = PNG_ARM_NEON, arg += 9; - - else -#endif -#ifdef PNG_MAXIMUM_INFLATE_WINDOW - if (strncmp(arg, "max-inflate-window:", 19) == 0) - option = PNG_MAXIMUM_INFLATE_WINDOW, arg += 19; - - else -#endif - { - fprintf(stderr, "pngvalid: %s: %s: unknown option\n", *argv, arg); - exit(99); - } - - if (strcmp(arg, "off") == 0) - setting = PNG_OPTION_OFF; - - else if (strcmp(arg, "on") == 0) - setting = PNG_OPTION_ON; - - else - { - fprintf(stderr, - "pngvalid: %s: %s: unknown setting (use 'on' or 'off')\n", - *argv, arg); - exit(99); - } - - pm.this.options[pm.this.noptions].option = option; - pm.this.options[pm.this.noptions++].setting = setting; - } -#endif /* PNG_SET_OPTION_SUPPORTED */ - - else - { - fprintf(stderr, "pngvalid: %s: unknown argument\n", *argv); - exit(99); - } - - if (catmore) /* consumed an extra *argv */ - { - cp = safecat(command, sizeof command, cp, " "); - cp = safecat(command, sizeof command, cp, *argv); - } - } - - /* If pngvalid is run with no arguments default to a reasonable set of the - * tests. - */ - if (pm.test_standard == 0 && pm.test_size == 0 && pm.test_transform == 0 && - pm.ngamma_tests == 0) - { - /* Make this do all the tests done in the test shell scripts with the same - * parameters, where possible. The limitation is that all the progressive - * read and interlace stuff has to be done in separate runs, so only the - * basic 'standard' and 'size' tests are done. - */ - pm.test_standard = 1; - pm.test_size = 1; - pm.test_transform = 1; - pm.ngamma_tests = 2U; - } - - if (pm.ngamma_tests > 0 && - pm.test_gamma_threshold == 0 && pm.test_gamma_transform == 0 && - pm.test_gamma_sbit == 0 && pm.test_gamma_scale16 == 0 && - pm.test_gamma_background == 0 && pm.test_gamma_alpha_mode == 0) - { - pm.test_gamma_threshold = 1; - pm.test_gamma_transform = 1; - pm.test_gamma_sbit = 1; - pm.test_gamma_scale16 = 1; - pm.test_gamma_background = 1; - pm.test_gamma_alpha_mode = 1; - } - - else if (pm.ngamma_tests == 0) - { - /* Nothing to test so turn everything off: */ - pm.test_gamma_threshold = 0; - pm.test_gamma_transform = 0; - pm.test_gamma_sbit = 0; - pm.test_gamma_scale16 = 0; - pm.test_gamma_background = 0; - pm.test_gamma_alpha_mode = 0; - } - - Try - { - /* Make useful base images */ - make_transform_images(&pm.this); - - /* Perform the standard and gamma tests. */ - if (pm.test_standard) - { - perform_interlace_macro_validation(); - perform_formatting_test(&pm.this); -# ifdef PNG_READ_SUPPORTED - perform_standard_test(&pm); -# endif - perform_error_test(&pm); - } - - /* Various oddly sized images: */ - if (pm.test_size) - { - make_size_images(&pm.this); -# ifdef PNG_READ_SUPPORTED - perform_size_test(&pm); -# endif - } - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - /* Combinatorial transforms: */ - if (pm.test_transform) - perform_transform_test(&pm); -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -#ifdef PNG_READ_GAMMA_SUPPORTED - if (pm.ngamma_tests > 0) - perform_gamma_test(&pm, summary); -#endif - } - - Catch_anonymous - { - fprintf(stderr, "pngvalid: test aborted (probably failed in cleanup)\n"); - if (!pm.this.verbose) - { - if (pm.this.error[0] != 0) - fprintf(stderr, "pngvalid: first error: %s\n", pm.this.error); - - fprintf(stderr, "pngvalid: run with -v to see what happened\n"); - } - exit(1); - } - - if (summary) - { - printf("%s: %s (%s point arithmetic)\n", - (pm.this.nerrors || (pm.this.treat_warnings_as_errors && - pm.this.nwarnings)) ? "FAIL" : "PASS", - command, -#if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || PNG_LIBPNG_VER < 10500 - "floating" -#else - "fixed" -#endif - ); - } - - if (memstats) - { - printf("Allocated memory statistics (in bytes):\n" - "\tread %lu maximum single, %lu peak, %lu total\n" - "\twrite %lu maximum single, %lu peak, %lu total\n", - (unsigned long)pm.this.read_memory_pool.max_max, - (unsigned long)pm.this.read_memory_pool.max_limit, - (unsigned long)pm.this.read_memory_pool.max_total, - (unsigned long)pm.this.write_memory_pool.max_max, - (unsigned long)pm.this.write_memory_pool.max_limit, - (unsigned long)pm.this.write_memory_pool.max_total); - } - - /* Do this here to provoke memory corruption errors in memory not directly - * allocated by libpng - not a complete test, but better than nothing. - */ - store_delete(&pm.this); - - /* Error exit if there are any errors, and maybe if there are any - * warnings. - */ - if (pm.this.nerrors || (pm.this.treat_warnings_as_errors && - pm.this.nwarnings)) - { - if (!pm.this.verbose) - fprintf(stderr, "pngvalid: %s\n", pm.this.error); - - fprintf(stderr, "pngvalid: %d errors, %d warnings\n", pm.this.nerrors, - pm.this.nwarnings); - - exit(1); - } - - /* Success case. */ - if (touch != NULL) - { - FILE *fsuccess = fopen(touch, "wt"); - - if (fsuccess != NULL) - { - int error = 0; - fprintf(fsuccess, "PNG validation succeeded\n"); - fflush(fsuccess); - error = ferror(fsuccess); - - if (fclose(fsuccess) || error) - { - fprintf(stderr, "%s: write failed\n", touch); - exit(1); - } - } - - else - { - fprintf(stderr, "%s: open failed\n", touch); - exit(1); - } - } - - /* This is required because some very minimal configurations do not use it: - */ - UNUSED(fail) - return 0; -} -#else /* write or low level APIs not supported */ -int main(void) -{ - fprintf(stderr, - "pngvalid: no low level write support in libpng, all tests skipped\n"); - /* So the test is skipped: */ - return SKIP; -} -#endif diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/readpng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/readpng.c deleted file mode 100644 index 7ba46d0b96b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/readpng.c +++ /dev/null @@ -1,104 +0,0 @@ -/* readpng.c - * - * Copyright (c) 2013 John Cunningham Bowler - * - * Last changed in libpng 1.6.1 [March 28, 2013] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Load an arbitrary number of PNG files (from the command line, or, if there - * are no arguments on the command line, from stdin) then run a time test by - * reading each file by row. The test does nothing with the read result and - * does no transforms. The only output is a time as a floating point number of - * seconds with 9 decimal digits. - */ -#include <stdlib.h> -#include <stdio.h> -#include <string.h> - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include <config.h> -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -static int -read_png(FILE *fp) -{ - png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); - png_infop info_ptr = NULL; - png_bytep row = NULL, display = NULL; - - if (png_ptr == NULL) - return 0; - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - if (row != NULL) free(row); - if (display != NULL) free(display); - return 0; - } - - png_init_io(png_ptr, fp); - - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - png_error(png_ptr, "OOM allocating info structure"); - - png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0); - - png_read_info(png_ptr, info_ptr); - - { - png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); - - row = malloc(rowbytes); - display = malloc(rowbytes); - - if (row == NULL || display == NULL) - png_error(png_ptr, "OOM allocating row buffers"); - - { - png_uint_32 height = png_get_image_height(png_ptr, info_ptr); - int passes = png_set_interlace_handling(png_ptr); - int pass; - - png_start_read_image(png_ptr); - - for (pass = 0; pass < passes; ++pass) - { - png_uint_32 y = height; - - /* NOTE: this trashes the row each time; interlace handling won't - * work, but this avoids memory thrashing for speed testing. - */ - while (y-- > 0) - png_read_row(png_ptr, row, display); - } - } - } - - /* Make sure to read to the end of the file: */ - png_read_end(png_ptr, info_ptr); - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - free(row); - free(display); - return 1; -} - -int -main(void) -{ - /* Exit code 0 on success. */ - return !read_png(stdin); -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/tarith.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/tarith.c deleted file mode 100644 index cdb00dbf7e7..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/tarith.c +++ /dev/null @@ -1,999 +0,0 @@ - -/* tarith.c - * - * Copyright (c) 2011-2013 John Cunningham Bowler - * - * Last changed in libpng 1.6.0 [February 14, 2013] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Test internal arithmetic functions of libpng. - * - * This code must be linked against a math library (-lm), but does not require - * libpng or zlib to work. Because it includes the complete source of 'png.c' - * it tests the code with whatever compiler options are used to build it. - * Changing these options can substantially change the errors in the - * calculations that the compiler chooses! - */ -#define _POSIX_SOURCE 1 -#define _ISOC99_SOURCE 1 - -/* Obtain a copy of the code to be tested (plus other things), disabling - * stuff that is not required. - */ -#include <math.h> -#include <stdlib.h> -#include <ctype.h> -#include <string.h> -#include <assert.h> - -#include "../../pngpriv.h" - -#define png_error png_warning - -void png_warning(png_const_structrp png_ptr, png_const_charp msg) -{ - fprintf(stderr, "validation: %s\n", msg); -} - -#define png_fixed_error png_fixed_warning - -void png_fixed_warning(png_const_structrp png_ptr, png_const_charp msg) -{ - fprintf(stderr, "overflow in: %s\n", msg); -} - -#define png_set_error_fn(pp, ep, efp, wfp) ((void)0) -#define png_malloc(pp, s) malloc(s) -#define png_malloc_warn(pp, s) malloc(s) -#define png_malloc_base(pp, s) malloc(s) -#define png_calloc(pp, s) calloc(1, (s)) -#define png_free(pp, s) free(s) - -#define png_safecat(b, sb, pos, str) (pos) -#define png_format_number(start, end, format, number) (start) - -#define crc32(crc, pp, s) (crc) -#define inflateReset(zs) Z_OK - -#define png_create_struct(type) (0) -#define png_destroy_struct(pp) ((void)0) -#define png_create_struct_2(type, m, mm) (0) -#define png_destroy_struct_2(pp, f, mm) ((void)0) - -#undef PNG_SIMPLIFIED_READ_SUPPORTED -#undef PNG_SIMPLIFIED_WRITE_SUPPORTED -#undef PNG_USER_MEM_SUPPORTED - -#include "../../png.c" - -/* Validate ASCII to fp routines. */ -static int verbose = 0; - -int validation_ascii_to_fp(int count, int argc, char **argv) -{ - int showall = 0; - double max_error=2; /* As a percentage error-in-last-digit/.5 */ - double max_error_abs=17; /* Used when precision is DBL_DIG */ - double max = 0; - double max_abs = 0; - double test = 0; /* Important to test this. */ - int precision = 5; - int nonfinite = 0; - int finite = 0; - int ok = 0; - int failcount = 0; - int minorarith = 0; - - while (--argc > 0) - if (strcmp(*++argv, "-a") == 0) - showall = 1; - else if (strcmp(*argv, "-e") == 0 && argc > 0) - { - --argc; - max_error = atof(*++argv); - } - else if (strcmp(*argv, "-E") == 0 && argc > 0) - { - --argc; - max_error_abs = atof(*++argv); - } - else - { - fprintf(stderr, "unknown argument %s\n", *argv); - return 1; - } - - do - { - png_size_t index; - int state, failed = 0; - char buffer[64]; - - if (isfinite(test)) - ++finite; - else - ++nonfinite; - - if (verbose) - fprintf(stderr, "%.*g %d\n", DBL_DIG, test, precision); - - /* Check for overflow in the buffer by setting a marker. */ - memset(buffer, 71, sizeof buffer); - - png_ascii_from_fp(0, buffer, precision+10, test, precision); - - /* Allow for a three digit exponent, this stuff will fail if - * the exponent is bigger than this! - */ - if (buffer[precision+7] != 71) - { - fprintf(stderr, "%g[%d] -> '%s'[%lu] buffer overflow\n", test, - precision, buffer, (unsigned long)strlen(buffer)); - failed = 1; - } - - /* Following are used for the number parser below and must be - * initialized to zero. - */ - state = 0; - index = 0; - if (!isfinite(test)) - { - /* Expect 'inf' */ - if (test >= 0 && strcmp(buffer, "inf") || - test < 0 && strcmp(buffer, "-inf")) - { - fprintf(stderr, "%g[%d] -> '%s' but expected 'inf'\n", test, - precision, buffer); - failed = 1; - } - } - else if (!png_check_fp_number(buffer, precision+10, &state, &index) || - buffer[index] != 0) - { - fprintf(stderr, "%g[%d] -> '%s' but has bad format ('%c')\n", test, - precision, buffer, buffer[index]); - failed = 1; - } - else if (PNG_FP_IS_NEGATIVE(state) && !(test < 0)) - { - fprintf(stderr, "%g[%d] -> '%s' but negative value not so reported\n", - test, precision, buffer); - failed = 1; - assert(!PNG_FP_IS_ZERO(state)); - assert(!PNG_FP_IS_POSITIVE(state)); - } - else if (PNG_FP_IS_ZERO(state) && !(test == 0)) - { - fprintf(stderr, "%g[%d] -> '%s' but zero value not so reported\n", - test, precision, buffer); - failed = 1; - assert(!PNG_FP_IS_NEGATIVE(state)); - assert(!PNG_FP_IS_POSITIVE(state)); - } - else if (PNG_FP_IS_POSITIVE(state) && !(test > 0)) - { - fprintf(stderr, "%g[%d] -> '%s' but postive value not so reported\n", - test, precision, buffer); - failed = 1; - assert(!PNG_FP_IS_NEGATIVE(state)); - assert(!PNG_FP_IS_ZERO(state)); - } - else - { - /* Check the result against the original. */ - double out = atof(buffer); - double change = fabs((out - test)/test); - double allow = .5/pow(10, - (precision >= DBL_DIG) ? DBL_DIG-1 : precision-1); - - /* NOTE: if you hit this error case are you compiling with gcc - * and -O0? Try -O2 - the errors can accumulate if the FP - * code above is not optimized and may drift outside the .5 in - * DBL_DIG allowed. In any case a small number of errors may - * occur (very small ones - 1 or 2%) because of rounding in the - * calculations, either in the conversion API or in atof. - */ - if (change >= allow && (isfinite(out) || - fabs(test/DBL_MAX) <= 1-allow)) - { - double percent = (precision >= DBL_DIG) ? max_error_abs : max_error; - double allowp = (change-allow)*100/allow; - - if (precision >= DBL_DIG) - { - if (max_abs < allowp) max_abs = allowp; - } - - else - { - if (max < allowp) max = allowp; - } - - if (showall || allowp >= percent) - { - fprintf(stderr, - "%.*g[%d] -> '%s' -> %.*g number changed (%g > %g (%d%%))\n", - DBL_DIG, test, precision, buffer, DBL_DIG, out, change, allow, - (int)round(allowp)); - failed = 1; - } - else - ++minorarith; - } - } - - if (failed) - ++failcount; - else - ++ok; - -skip: - /* Generate a new number and precision. */ - precision = rand(); - if (precision & 1) test = -test; - precision >>= 1; - - /* Generate random numbers. */ - if (test == 0 || !isfinite(test)) - test = precision+1; - else - { - /* Derive the exponent from the previous rand() value. */ - int exponent = precision % (DBL_MAX_EXP - DBL_MIN_EXP) + DBL_MIN_EXP; - int tmp; - test = frexp(test * rand(), &tmp); - test = ldexp(test, exponent); - precision >>= 8; /* arbitrary */ - } - - /* This limits the precision to 32 digits, enough for standard - * IEEE implementations which have at most 15 digits. - */ - precision = (precision & 0x1f) + 1; - } - while (--count); - - printf("Tested %d finite values, %d non-finite, %d OK (%d failed) %d minor " - "arithmetic errors\n", finite, nonfinite, ok, failcount, minorarith); - printf(" Error with >=%d digit precision %.2f%%\n", DBL_DIG, max_abs); - printf(" Error with < %d digit precision %.2f%%\n", DBL_DIG, max); - - return 0; -} - -/* Observe that valid FP numbers have the forms listed in the PNG extensions - * specification: - * - * [+,-]{integer,integer.fraction,.fraction}[{e,E}[+,-]integer] - * - * Test each of these in turn, including invalid cases. - */ -typedef enum checkfp_state -{ - start, fraction, exponent, states -} checkfp_state; - -/* The characters (other than digits) that characterize the states: */ -static const char none[] = ""; -static const char hexdigits[16] = "0123456789ABCDEF"; - -static const struct -{ - const char *start; /* Characters valid at the start */ - const char *end; /* Valid characters that end the state */ - const char *tests; /* Characters to test after 2 digits seen */ -} -state_characters[states] = -{ - /* start: */ { "+-.", ".eE", "+-.e*0369" }, - /* fraction: */ { none, "eE", "+-.E#0147" }, - /* exponent: */ { "+-", none, "+-.eE^0258" } -}; - -typedef struct -{ - char number[1024]; /* Buffer for number being tested */ - int limit; /* Command line limit */ - int verbose; /* Shadows global variable */ - int ctimes; /* Number of numbers tested */ - int cmillions; /* Count of millions of numbers */ - int cinvalid; /* Invalid strings checked */ - int cnoaccept; /* Characters not accepted */ -} -checkfp_command; - -typedef struct -{ - int cnumber; /* Index into number string */ - checkfp_state check_state; /* Current number state */ - int at_start; /* At start (first character) of state */ - int cdigits_in_state; /* Digits seen in that state */ - int limit; /* Limit on same for checking all chars */ - int state; /* Current parser state */ - int is_negative; /* Number is negative */ - int is_zero; /* Number is (still) zero */ - int number_was_valid; /* Previous character validity */ -} -checkfp_control; - -static int check_all_characters(checkfp_command *co, checkfp_control c); - -static int check_some_characters(checkfp_command *co, checkfp_control c, - const char *tests); - -static int check_one_character(checkfp_command *co, checkfp_control c, int ch) -{ - /* Test this character (ch) to ensure the parser does the correct thing. - */ - png_size_t index = 0; - const char test = (char)ch; - const int number_is_valid = png_check_fp_number(&test, 1, &c.state, &index); - const int character_accepted = (index == 1); - - if (c.check_state != exponent && isdigit(ch) && ch != '0') - c.is_zero = 0; - - if (c.check_state == start && c.at_start && ch == '-') - c.is_negative = 1; - - if (isprint(ch)) - co->number[c.cnumber++] = (char)ch; - else - { - co->number[c.cnumber++] = '<'; - co->number[c.cnumber++] = hexdigits[(ch >> 4) & 0xf]; - co->number[c.cnumber++] = hexdigits[ch & 0xf]; - co->number[c.cnumber++] = '>'; - } - co->number[c.cnumber] = 0; - - if (co->verbose > 1) - fprintf(stderr, "%s\n", co->number); - - if (++(co->ctimes) == 1000000) - { - if (co->verbose == 1) - fputc('.', stderr); - co->ctimes = 0; - ++(co->cmillions); - } - - if (!number_is_valid) - ++(co->cinvalid); - - if (!character_accepted) - ++(co->cnoaccept); - - /* This should never fail (it's a serious bug if it does): */ - if (index != 0 && index != 1) - { - fprintf(stderr, "%s: read beyond end of string (%lu)\n", co->number, - (unsigned long)index); - return 0; - } - - /* Validate the new state, note that the PNG_FP_IS_ macros all return - * false unless the number is valid. - */ - if (PNG_FP_IS_NEGATIVE(c.state) != - (number_is_valid && !c.is_zero && c.is_negative)) - { - fprintf(stderr, "%s: negative when it is not\n", co->number); - return 0; - } - - if (PNG_FP_IS_ZERO(c.state) != (number_is_valid && c.is_zero)) - { - fprintf(stderr, "%s: zero when it is not\n", co->number); - return 0; - } - - if (PNG_FP_IS_POSITIVE(c.state) != - (number_is_valid && !c.is_zero && !c.is_negative)) - { - fprintf(stderr, "%s: positive when it is not\n", co->number); - return 0; - } - - /* Testing a digit */ - if (isdigit(ch)) - { - if (!character_accepted) - { - fprintf(stderr, "%s: digit '%c' not accepted\n", co->number, ch); - return 0; - } - - if (!number_is_valid) - { - fprintf(stderr, "%s: saw a digit (%c) but number not valid\n", - co->number, ch); - return 0; - } - - ++c.cdigits_in_state; - c.at_start = 0; - c.number_was_valid = 1; - - /* Continue testing characters in this state. Either test all of - * them or, if we have already seen one digit in this state, just test a - * limited set. - */ - if (c.cdigits_in_state < 1) - return check_all_characters(co, c); - - else - return check_some_characters(co, c, - state_characters[c.check_state].tests); - } - - /* A non-digit; is it allowed here? */ - else if (((ch == '+' || ch == '-') && c.check_state != fraction && - c.at_start) || - (ch == '.' && c.check_state == start) || - ((ch == 'e' || ch == 'E') && c.number_was_valid && - c.check_state != exponent)) - { - if (!character_accepted) - { - fprintf(stderr, "%s: character '%c' not accepted\n", co->number, ch); - return 0; - } - - /* The number remains valid after start of fraction but nowhere else. */ - if (number_is_valid && (c.check_state != start || ch != '.')) - { - fprintf(stderr, "%s: saw a non-digit (%c) but number valid\n", - co->number, ch); - return 0; - } - - c.number_was_valid = number_is_valid; - - /* Check for a state change. When changing to 'fraction' if the number - * is valid at this point set the at_start to false to allow an exponent - * 'e' to come next. - */ - if (c.check_state == start && ch == '.') - { - c.check_state = fraction; - c.at_start = !number_is_valid; - c.cdigits_in_state = 0; - c.limit = co->limit; - return check_all_characters(co, c); - } - - else if (c.check_state < exponent && (ch == 'e' || ch == 'E')) - { - c.check_state = exponent; - c.at_start = 1; - c.cdigits_in_state = 0; - c.limit = co->limit; - return check_all_characters(co, c); - } - - /* Else it was a sign, and the state doesn't change. */ - else - { - if (ch != '-' && ch != '+') - { - fprintf(stderr, "checkfp: internal error (1)\n"); - return 0; - } - - c.at_start = 0; - return check_all_characters(co, c); - } - } - - /* Testing an invalid character */ - else - { - if (character_accepted) - { - fprintf(stderr, "%s: character '%c' [0x%.2x] accepted\n", co->number, - ch, ch); - return 0; - } - - if (number_is_valid != c.number_was_valid) - { - fprintf(stderr, - "%s: character '%c' [0x%.2x] changed number validity\n", co->number, - ch, ch); - return 0; - } - - /* Do nothing - the parser has stuck; return success and keep going with - * the next character. - */ - } - - /* Successful return (the caller will try the next character.) */ - return 1; -} - -static int check_all_characters(checkfp_command *co, checkfp_control c) -{ - int ch; - - if (c.cnumber+4 < sizeof co->number) for (ch=0; ch<256; ++ch) - { - if (!check_one_character(co, c, ch)) - return 0; - } - - return 1; -} - -static int check_some_characters(checkfp_command *co, checkfp_control c, - const char *tests) -{ - int i; - - --(c.limit); - - if (c.cnumber+4 < sizeof co->number && c.limit >= 0) - { - if (c.limit > 0) for (i=0; tests[i]; ++i) - { - if (!check_one_character(co, c, tests[i])) - return 0; - } - - /* At the end check all the characters. */ - else - return check_all_characters(co, c); - } - - return 1; -} - -int validation_checkfp(int count, int argc, char **argv) -{ - int result; - checkfp_command command; - checkfp_control control; - - command.number[0] = 0; - command.limit = 3; - command.verbose = verbose; - command.ctimes = 0; - command.cmillions = 0; - command.cinvalid = 0; - command.cnoaccept = 0; - - while (--argc > 0) - { - ++argv; - if (argc > 1 && strcmp(*argv, "-l") == 0) - { - --argc; - command.limit = atoi(*++argv); - } - - else - { - fprintf(stderr, "unknown argument %s\n", *argv); - return 1; - } - } - - control.cnumber = 0; - control.check_state = start; - control.at_start = 1; - control.cdigits_in_state = 0; - control.limit = command.limit; - control.state = 0; - control.is_negative = 0; - control.is_zero = 1; - control.number_was_valid = 0; - - result = check_all_characters(&command, control); - - printf("checkfp: %s: checked %d,%.3d,%.3d,%.3d strings (%d invalid)\n", - result ? "pass" : "FAIL", command.cmillions / 1000, - command.cmillions % 1000, command.ctimes / 1000, command.ctimes % 1000, - command.cinvalid); - - return result; -} - -int validation_muldiv(int count, int argc, char **argv) -{ - int tested = 0; - int overflow = 0; - int error = 0; - int error64 = 0; - int passed = 0; - int randbits = 0; - png_uint_32 randbuffer; - png_fixed_point a; - png_int_32 times, div; - - while (--argc > 0) - { - fprintf(stderr, "unknown argument %s\n", *++argv); - return 1; - } - - /* Find out about the random number generator. */ - randbuffer = RAND_MAX; - while (randbuffer != 0) ++randbits, randbuffer >>= 1; - printf("Using random number generator that makes %d bits\n", randbits); - for (div=0; div<32; div += randbits) - randbuffer = (randbuffer << randbits) ^ rand(); - - a = 0; - times = div = 0; - do - { - png_fixed_point result; - /* NOTE: your mileage may vary, a type is required below that can - * hold 64 bits or more, if floating point is used a 64 bit or - * better mantissa is required. - */ - long long int fp, fpround; - unsigned long hi, lo; - int ok; - - /* Check the values, png_64bit_product can only handle positive - * numbers, so correct for that here. - */ - { - long u1, u2; - int n = 0; - if (a < 0) u1 = -a, n = 1; else u1 = a; - if (times < 0) u2 = -times, n = !n; else u2 = times; - png_64bit_product(u1, u2, &hi, &lo); - if (n) - { - /* -x = ~x+1 */ - lo = ((~lo) + 1) & 0xffffffff; - hi = ~hi; - if (lo == 0) ++hi; - } - } - - fp = a; - fp *= times; - if ((fp & 0xffffffff) != lo || ((fp >> 32) & 0xffffffff) != hi) - { - fprintf(stderr, "png_64bit_product %d * %d -> %lx|%.8lx not %llx\n", - a, times, hi, lo, fp); - ++error64; - } - - if (div != 0) - { - /* Round - this is C round to zero. */ - if ((fp < 0) != (div < 0)) - fp -= div/2; - else - fp += div/2; - - fp /= div; - fpround = fp; - /* Assume 2's complement here: */ - ok = fpround <= PNG_UINT_31_MAX && - fpround >= -1-(long long int)PNG_UINT_31_MAX; - if (!ok) ++overflow; - } - else - ok = 0, ++overflow, fpround = fp/*misleading*/; - - if (verbose) - fprintf(stderr, "TEST %d * %d / %d -> %lld (%s)\n", a, times, div, - fp, ok ? "ok" : "overflow"); - - ++tested; - if (png_muldiv(&result, a, times, div) != ok) - { - ++error; - if (ok) - fprintf(stderr, "%d * %d / %d -> overflow (expected %lld)\n", a, - times, div, fp); - else - fprintf(stderr, "%d * %d / %d -> %d (expected overflow %lld)\n", a, - times, div, result, fp); - } - else if (ok && result != fpround) - { - ++error; - fprintf(stderr, "%d * %d / %d -> %d not %lld\n", a, times, div, result, - fp); - } - else - ++passed; - - /* Generate three new values, this uses rand() and rand() only returns - * up to RAND_MAX. - */ - /* CRUDE */ - a += times; - times += div; - div = randbuffer; - randbuffer = (randbuffer << randbits) ^ rand(); - } - while (--count > 0); - - printf("%d tests including %d overflows, %d passed, %d failed (%d 64 bit " - "errors)\n", tested, overflow, passed, error, error64); - return 0; -} - -/* When FP is on this just becomes a speed test - compile without FP to get real - * validation. - */ -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED -#define LN2 .000010576586617430806112933839 /* log(2)/65536 */ -#define L2INV 94548.46219969910586572651 /* 65536/log(2) */ - -/* For speed testing, need the internal functions too: */ -static png_uint_32 png_log8bit(unsigned x) -{ - if (x > 0) - return (png_uint_32)floor(.5-log(x/255.)*L2INV); - - return 0xffffffff; -} - -static png_uint_32 png_log16bit(png_uint_32 x) -{ - if (x > 0) - return (png_uint_32)floor(.5-log(x/65535.)*L2INV); - - return 0xffffffff; -} - -static png_uint_32 png_exp(png_uint_32 x) -{ - return (png_uint_32)floor(.5 + exp(x * -LN2) * 0xffffffffU); -} - -static png_byte png_exp8bit(png_uint_32 log) -{ - return (png_byte)floor(.5 + exp(log * -LN2) * 255); -} - -static png_uint_16 png_exp16bit(png_uint_32 log) -{ - return (png_uint_16)floor(.5 + exp(log * -LN2) * 65535); -} -#endif /* FLOATING_ARITHMETIC */ - -int validation_gamma(int argc, char **argv) -{ - double gamma[9] = { 2.2, 1.8, 1.52, 1.45, 1., 1/1.45, 1/1.52, 1/1.8, 1/2.2 }; - double maxerr; - int i, silent=0, onlygamma=0; - - /* Silence the output with -s, just test the gamma functions with -g: */ - while (--argc > 0) - if (strcmp(*++argv, "-s") == 0) - silent = 1; - else if (strcmp(*argv, "-g") == 0) - onlygamma = 1; - else - { - fprintf(stderr, "unknown argument %s\n", *argv); - return 1; - } - - if (!onlygamma) - { - /* First validate the log functions: */ - maxerr = 0; - for (i=0; i<256; ++i) - { - double correct = -log(i/255.)/log(2.)*65536; - double error = png_log8bit(i) - correct; - - if (i != 0 && fabs(error) > maxerr) - maxerr = fabs(error); - - if (i == 0 && png_log8bit(i) != 0xffffffff || - i != 0 && png_log8bit(i) != floor(correct+.5)) - { - fprintf(stderr, "8 bit log error: %d: got %u, expected %f\n", - i, png_log8bit(i), correct); - } - } - - if (!silent) - printf("maximum 8 bit log error = %f\n", maxerr); - - maxerr = 0; - for (i=0; i<65536; ++i) - { - double correct = -log(i/65535.)/log(2.)*65536; - double error = png_log16bit(i) - correct; - - if (i != 0 && fabs(error) > maxerr) - maxerr = fabs(error); - - if (i == 0 && png_log16bit(i) != 0xffffffff || - i != 0 && png_log16bit(i) != floor(correct+.5)) - { - if (error > .68) /* By experiment error is less than .68 */ - { - fprintf(stderr, "16 bit log error: %d: got %u, expected %f" - " error: %f\n", i, png_log16bit(i), correct, error); - } - } - } - - if (!silent) - printf("maximum 16 bit log error = %f\n", maxerr); - - /* Now exponentiations. */ - maxerr = 0; - for (i=0; i<=0xfffff; ++i) - { - double correct = exp(-i/65536. * log(2.)) * (65536. * 65536); - double error = png_exp(i) - correct; - - if (fabs(error) > maxerr) - maxerr = fabs(error); - if (fabs(error) > 1883) /* By experiment. */ - { - fprintf(stderr, "32 bit exp error: %d: got %u, expected %f" - " error: %f\n", i, png_exp(i), correct, error); - } - } - - if (!silent) - printf("maximum 32 bit exp error = %f\n", maxerr); - - maxerr = 0; - for (i=0; i<=0xfffff; ++i) - { - double correct = exp(-i/65536. * log(2.)) * 255; - double error = png_exp8bit(i) - correct; - - if (fabs(error) > maxerr) - maxerr = fabs(error); - if (fabs(error) > .50002) /* By experiment */ - { - fprintf(stderr, "8 bit exp error: %d: got %u, expected %f" - " error: %f\n", i, png_exp8bit(i), correct, error); - } - } - - if (!silent) - printf("maximum 8 bit exp error = %f\n", maxerr); - - maxerr = 0; - for (i=0; i<=0xfffff; ++i) - { - double correct = exp(-i/65536. * log(2.)) * 65535; - double error = png_exp16bit(i) - correct; - - if (fabs(error) > maxerr) - maxerr = fabs(error); - if (fabs(error) > .524) /* By experiment */ - { - fprintf(stderr, "16 bit exp error: %d: got %u, expected %f" - " error: %f\n", i, png_exp16bit(i), correct, error); - } - } - - if (!silent) - printf("maximum 16 bit exp error = %f\n", maxerr); - } /* !onlygamma */ - - /* Test the overall gamma correction. */ - for (i=0; i<9; ++i) - { - unsigned j; - double g = gamma[i]; - png_fixed_point gfp = floor(g * PNG_FP_1 + .5); - - if (!silent) - printf("Test gamma %f\n", g); - - maxerr = 0; - for (j=0; j<256; ++j) - { - double correct = pow(j/255., g) * 255; - png_byte out = png_gamma_8bit_correct(j, gfp); - double error = out - correct; - - if (fabs(error) > maxerr) - maxerr = fabs(error); - if (out != floor(correct+.5)) - { - fprintf(stderr, "8bit %d ^ %f: got %d expected %f error %f\n", - j, g, out, correct, error); - } - } - - if (!silent) - printf("gamma %f: maximum 8 bit error %f\n", g, maxerr); - - maxerr = 0; - for (j=0; j<65536; ++j) - { - double correct = pow(j/65535., g) * 65535; - png_uint_16 out = png_gamma_16bit_correct(j, gfp); - double error = out - correct; - - if (fabs(error) > maxerr) - maxerr = fabs(error); - if (fabs(error) > 1.62) - { - fprintf(stderr, "16bit %d ^ %f: got %d expected %f error %f\n", - j, g, out, correct, error); - } - } - - if (!silent) - printf("gamma %f: maximum 16 bit error %f\n", g, maxerr); - } - - return 0; -} - -/**************************** VALIDATION TESTS ********************************/ -/* Various validation routines are included herein, they require some - * definition for png_warning and png_error, seetings of VALIDATION: - * - * 1: validates the ASCII to floating point conversions - * 2: validates png_muldiv - * 3: accuracy test of fixed point gamma tables - */ - -/* The following COUNT (10^8) takes about 1 hour on a 1GHz Pentium IV - * processor. - */ -#define COUNT 1000000000 - -int main(int argc, char **argv) -{ - int count = COUNT; - - while (argc > 1) - { - if (argc > 2 && strcmp(argv[1], "-c") == 0) - { - count = atoi(argv[2]); - argc -= 2; - argv += 2; - } - - else if (strcmp(argv[1], "-v") == 0) - { - ++verbose; - --argc; - ++argv; - } - - else - break; - } - - if (count > 0 && argc > 1) - { - if (strcmp(argv[1], "ascii") == 0) - return validation_ascii_to_fp(count, argc-1, argv+1); - else if (strcmp(argv[1], "checkfp") == 0) - return validation_checkfp(count, argc-1, argv+1); - else if (strcmp(argv[1], "muldiv") == 0) - return validation_muldiv(count, argc-1, argv+1); - else if (strcmp(argv[1], "gamma") == 0) - return validation_gamma(argc-1, argv+1); - } - - /* Bad argument: */ - fprintf(stderr, - "usage: tarith [-v] [-c count] {ascii,muldiv,gamma} [args]\n"); - fprintf(stderr, " arguments: ascii [-a (all results)] [-e error%%]\n"); - fprintf(stderr, " checkfp [-l max-number-chars]\n"); - fprintf(stderr, " muldiv\n"); - fprintf(stderr, " gamma -s (silent) -g (only gamma; no log)\n"); - return 1; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/timepng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/timepng.c deleted file mode 100644 index 7c937971cfd..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/libtests/timepng.c +++ /dev/null @@ -1,303 +0,0 @@ -/* timepng.c - * - * Copyright (c) 2013 John Cunningham Bowler - * - * Last changed in libpng 1.6.1 [March 28, 2013] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Load an arbitrary number of PNG files (from the command line, or, if there - * are no arguments on the command line, from stdin) then run a time test by - * reading each file by row. The test does nothing with the read result and - * does no transforms. The only output is a time as a floating point number of - * seconds with 9 decimal digits. - */ -#define _POSIX_C_SOURCE 199309L /* for clock_gettime */ - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> - -#include <time.h> - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include <config.h> -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -static int read_png(FILE *fp) -{ - png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); - png_infop info_ptr = NULL; - png_bytep row = NULL, display = NULL; - - if (png_ptr == NULL) - return 0; - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - if (row != NULL) free(row); - if (display != NULL) free(display); - return 0; - } - - png_init_io(png_ptr, fp); - - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - png_error(png_ptr, "OOM allocating info structure"); - - png_read_info(png_ptr, info_ptr); - - { - png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); - - row = malloc(rowbytes); - display = malloc(rowbytes); - - if (row == NULL || display == NULL) - png_error(png_ptr, "OOM allocating row buffers"); - - { - png_uint_32 height = png_get_image_height(png_ptr, info_ptr); - int passes = png_set_interlace_handling(png_ptr); - int pass; - - png_start_read_image(png_ptr); - - for (pass = 0; pass < passes; ++pass) - { - png_uint_32 y = height; - - /* NOTE: this trashes the row each time; interlace handling won't - * work, but this avoids memory thrashing for speed testing. - */ - while (y-- > 0) - png_read_row(png_ptr, row, display); - } - } - } - - /* Make sure to read to the end of the file: */ - png_read_end(png_ptr, info_ptr); - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - free(row); - free(display); - return 1; -} - -static int mytime(struct timespec *t) -{ - /* Do the timing using clock_gettime and the per-process timer. */ - if (!clock_gettime(CLOCK_PROCESS_CPUTIME_ID, t)) - return 1; - - perror("CLOCK_PROCESS_CPUTIME_ID"); - fprintf(stderr, "timepng: could not get the time\n"); - return 0; -} - -static int perform_one_test(FILE *fp, int nfiles) -{ - int i; - struct timespec before, after; - - /* Clear out all errors: */ - rewind(fp); - - if (mytime(&before)) - { - for (i=0; i<nfiles; ++i) - { - if (read_png(fp)) - { - if (ferror(fp)) - { - perror("temporary file"); - fprintf(stderr, "file %d: error reading PNG data\n", i); - return 0; - } - } - - else - { - perror("temporary file"); - fprintf(stderr, "file %d: error from libpng\n", i); - return 0; - } - } - } - - else - return 0; - - if (mytime(&after)) - { - /* Work out the time difference and print it - this is the only output, - * so flush it immediately. - */ - unsigned long s = after.tv_sec - before.tv_sec; - long ns = after.tv_nsec - before.tv_nsec; - - if (ns < 0) - { - --s; - ns += 1000000000; - - if (ns < 0) - { - fprintf(stderr, "timepng: bad clock from kernel\n"); - return 0; - } - } - - printf("%lu.%.9ld\n", s, ns); - fflush(stdout); - if (ferror(stdout)) - { - fprintf(stderr, "timepng: error writing output\n"); - return 0; - } - - /* Successful return */ - return 1; - } - - else - return 0; -} - -static int add_one_file(FILE *fp, char *name) -{ - FILE *ip = fopen(name, "rb"); - - if (ip != NULL) - { - int ch; - for (;;) - { - ch = getc(ip); - if (ch == EOF) break; - putc(ch, fp); - } - - if (ferror(ip)) - { - perror(name); - fprintf(stderr, "%s: read error\n", name); - return 0; - } - - (void)fclose(ip); - - if (ferror(fp)) - { - perror("temporary file"); - fprintf(stderr, "temporary file write error\n"); - return 0; - } - } - - else - { - perror(name); - fprintf(stderr, "%s: open failed\n", name); - return 0; - } - - return 1; -} - -int main(int argc, char **argv) -{ - int ok = 0; - FILE *fp = tmpfile(); - - if (fp != NULL) - { - int err = 0; - int nfiles = 0; - - if (argc > 1) - { - int i; - - for (i=1; i<argc; ++i) - { - if (add_one_file(fp, argv[i])) - ++nfiles; - - else - { - err = 1; - break; - } - } - } - - else - { - char filename[FILENAME_MAX+1]; - - while (fgets(filename, FILENAME_MAX+1, stdin)) - { - size_t len = strlen(filename); - - if (filename[len-1] == '\n') - { - filename[len-1] = 0; - if (add_one_file(fp, filename)) - ++nfiles; - - else - { - err = 1; - break; - } - } - - else - { - fprintf(stderr, "timepng: truncated file name ...%s\n", - filename+len-32); - err = 1; - break; - } - } - - if (ferror(stdin)) - { - fprintf(stderr, "timepng: stdin: read error\n"); - err = 1; - } - } - - if (!err) - { - if (nfiles > 0) - ok = perform_one_test(fp, nfiles); - - else - fprintf(stderr, "usage: timepng {files} or ls files | timepng\n"); - } - - (void)fclose(fp); - } - - else - fprintf(stderr, "timepng: could not open temporary file\n"); - - /* Exit code 0 on success. */ - return ok == 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/README deleted file mode 100644 index e17fe35b6a8..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/README +++ /dev/null @@ -1,5 +0,0 @@ - -This demonstrates the use of PNG_USER_CONFIG, pngusr.h and pngusr.dfa -to build minimal decoder, encoder, and progressive reader applications. - -See the individual README and pngusr.dfa files for more explanation. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/README deleted file mode 100644 index fa979fcb727..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/README +++ /dev/null @@ -1,10 +0,0 @@ -This demonstrates the use of PNG_USER_CONFIG, pngusr.h and pngusr.dfa - -The makefile builds a minimal read-only decoder with embedded libpng -and zlib. - -Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC -on the make command line. - -If you prefer to use the shared libraries, go to contrib/pngminus -and build the png2pnm application there. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/makefile b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/makefile deleted file mode 100644 index 4acf3c1779b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/makefile +++ /dev/null @@ -1,151 +0,0 @@ -# Makefile for PngMinus (pngm2pnm) -# Linux / Unix - -#CC=cc -CC=gcc -LD=$(CC) - -# If awk fails try -# make AWK=nawk - -# If cpp fails try -# make CPP=/lib/cpp - -RM=rm -f -COPY=cp - -CPPFLAGS=-I. -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP -CFLAGS=-O1 -Wall - -C=.c -O=.o -L=.a -E= - -# Where to find the source code: -PNGSRC =../../.. -ZLIBSRC=$(PNGSRC)/../zlib -PROGSRC=$(PNGSRC)/contrib/pngminus - -# Zlib (minimal inflate requirements - crc32 is used by libpng) -# zutil can be eliminated if you provide your own zcalloc and zcfree -ZSRCS = adler32$(C) crc32$(C) \ - inffast$(C) inflate$(C) inftrees$(C) \ - zutil$(C) - -# Standard headers -ZH = zlib.h crc32.h inffast.h inffixed.h \ - inflate.h inftrees.h zutil.h - -# Machine generated headers -ZCONF = zconf.h - -# Headers callers use -ZINC = zlib.h $(ZCONF) - -# Headers the Zlib source uses -ZHDRS = $(ZH) $(ZCONF) - -ZOBJS = adler32$(O) crc32$(O) \ - inffast$(O) inflate$(O) inftrees$(O) \ - zutil$(O) - -# libpng -PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \ - pngread$(C) pngrio$(C) pngrtran$(C) pngrutil$(C) \ - pngset$(C) pngtrans$(C) - -# Standard headers -PNGH =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h - -# Machine generated headers -PNGCONF=pnglibconf.h - -# Headers callers use -PNGINC= png.h pngconf.h pngusr.h $(PNGCONF) - -# Headers the PNG library uses -PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h - -PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \ - pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \ - pngset$(O) pngtrans$(O) - -PROGSRCS= pngm2pnm$(C) -PROGHDRS= -PROGDOCS= -PROGOBJS= pngm2pnm$(O) - -OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS) - -# implicit make rules ------------------------------------------------------- - -# note: dependencies do not work on implicit rule lines -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - -# dependencies - -all: pngm2pnm$(E) - -pngm2pnm$(E): $(OBJS) - $(LD) -o pngm2pnm$(E) $(OBJS) - -# The DFA_XTRA setting turns all libpng options off then -# turns on those required for this minimal build. -# The CPP_FLAGS setting causes pngusr.h to be included in -# both the build of pnglibconf.h and, subsequently, when -# building libpng itself. -$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\ - $(PNGSRC)/scripts/pnglibconf.dfa \ - $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa - $(RM) pnglibconf.h pnglibconf.dfn - $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ - srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\ - DFA_XTRA="pngusr.dfa" $@ - -clean: - $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ - srcdir=$(PNGSRC) clean - $(RM) pngm2pnm$(O) - $(RM) pngm2pnm$(E) - $(RM) $(OBJS) - -# distclean also removes the copied source and headers -distclean: clean - $(RM) -r scripts # historical reasons - $(RM) $(PNGSRCS) $(PNGH) - $(RM) $(ZSRCS) $(ZH) $(ZCONF) - $(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS) - -# Header file dependencies: -$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC) -$(PNGOBJS): $(PNGHDRS) $(ZINC) -$(ZOBJS): $(ZHDRS) - -# Gather the source code from the respective directories -$(PNGSRCS) $(PNGH): $(PNGSRC)/$@ - $(RM) $@ - $(COPY) $(PNGSRC)/$@ $@ - -# No dependency on the ZLIBSRC target so that it only needs -# to be specified once. -$(ZSRCS) $(ZH): - $(RM) $@ - $(COPY) $(ZLIBSRC)/$@ $@ - -# The unconfigured zconf.h varies in name according to the -# zlib release -$(ZCONF): - $(RM) $@ - @for f in zconf.h.in zconf.in.h zconf.h; do\ - test -r $(ZLIBSRC)/$$f &&\ - echo $(COPY) $(ZLIBSRC)/$$f $@ &&\ - $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\ - done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1 - -pngm2pnm.c: $(PROGSRC)/png2pnm.c - $(RM) $@ - $(COPY) $(PROGSRC)/png2pnm.c $@ - -# End of makefile for pngm2pnm diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/pngusr.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/pngusr.dfa deleted file mode 100644 index 4f402721ab0..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/pngusr.dfa +++ /dev/null @@ -1,40 +0,0 @@ -# pngminim/decoder/pngusr.dfa -# -# Copyright (c) 2010-2013 Glenn Randers-Pehrson -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# First all the build options off: - -everything = off - -# All that is required is some read code. This example switches -# on the sequential read code (see ../preader for a progressive -# read example). - -option SEQUENTIAL_READ on - -# You must choose fixed or floating point arithmetic: -# option FLOATING_POINT on - -option FIXED_POINT on - -# You must chose the internal fixed point implementation or to -# use the system floating point. The latter is considerably -# smaller (by about 1kbyte on an x86 system): -# option FLOATING_ARITHMETIC on - -option FLOATING_ARITHMETIC off - -# Your program will probably need other options. The example -# program here, pngm2pnm, requires the following. Take a look -# at pnglibconf.h to find out the full set of what has to be -# enabled to make the following work. - -option SETJMP on -option STDIO on -option READ_EXPAND on -option READ_STRIP_16_TO_8 on -option USER_LIMITS on diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/pngusr.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/pngusr.h deleted file mode 100644 index cbd7890c7d6..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/decoder/pngusr.h +++ /dev/null @@ -1,23 +0,0 @@ -/* minrdpngconf.h: headers to make a minimal png-read-only library - * - * Copyright (c) 2007, 2010-2013 Glenn Randers-Pehrson - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Derived from pngcrush.h, Copyright 1998-2007, Glenn Randers-Pehrson - */ - -#ifndef MINRDPNGCONF_H -#define MINRDPNGCONF_H - -/* To include pngusr.h set -DPNG_USER_CONFIG in CPPFLAGS */ - -/* List options to turn off features of the build that do not - * affect the API (so are not recorded in pnglibconf.h) - */ - -#define PNG_ALIGN_TYPE PNG_ALIGN_NONE - -#endif /* MINRDPNGCONF_H */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/README deleted file mode 100644 index d8d9a6466e2..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/README +++ /dev/null @@ -1,10 +0,0 @@ -This demonstrates the use of PNG_USER_CONFIG and pngusr.h - -The makefile builds a minimal write-only encoder with embedded libpng -and zlib. - -Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC -on the make command line. - -If you prefer to use the shared libraries, go to contrib/pngminus -and build the pnm2png application there. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/makefile b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/makefile deleted file mode 100644 index 41b205c284a..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/makefile +++ /dev/null @@ -1,150 +0,0 @@ -# Makefile for PngMinus (pnm2pngm) -# Linux / Unix - -#CC=cc -CC=gcc -LD=$(CC) - -# If awk fails try -# make AWK=nawk - -# If cpp fails try -# make CPP=/lib/cpp - -RM=rm -f -COPY=cp - -CPPFLAGS=-I. -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP -CFLAGS=-O1 -Wall - -C=.c -O=.o -L=.a -E= - -# Where to find the source code: -PNGSRC =../../.. -ZLIBSRC=$(PNGSRC)/../zlib -PROGSRC=$(PNGSRC)/contrib/pngminus - -# Zlib -ZSRCS = adler32$(C) compress$(C) crc32$(C) deflate$(C) \ - trees$(C) zutil$(C) - -# Standard headers -#ZH = zlib.h crc32.h deflate.h trees.h zutil.h -ZH = zlib.h crc32.h deflate.h trees.h zutil.h - -# Machine generated headers -ZCONF = zconf.h - -# Headers callers use -ZINC = zlib.h $(ZCONF) - -# Headers the Zlib source uses -ZHDRS = $(ZH) $(ZCONF) - -# compress is not required; it is needed to link the zlib -# code because deflate defines an unused API function deflateBound -# which itself calls compressBound from compress. -ZOBJS = adler32$(O) compress$(O) crc32$(O) deflate$(O) \ - trees$(O) zutil$(O) - -# libpng -PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \ - pngset$(C) pngtrans$(C) pngwio$(C) pngwrite$(C) \ - pngwtran$(C) pngwutil$(C) - -# Standard headers -PNGH =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h - -# Machine generated headers -PNGCONF=pnglibconf.h - -# Headers callers use -PNGINC= png.h pngconf.h pngusr.h $(PNGCONF) - -# Headers the PNG library uses -PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h - -PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \ - pngset$(O) pngtrans$(O) pngwio$(O) pngwrite$(O) \ - pngwtran$(O) pngwutil$(O) - -PROGSRCS= pnm2pngm$(C) -PROGHDRS= -PROGDOCS= -PROGOBJS= pnm2pngm$(O) - -OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS) - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - -# dependencies - -all: pnm2pngm$(E) - -pnm2pngm$(E): $(OBJS) - $(LD) -o pnm2pngm$(E) $(OBJS) - -# The DFA_XTRA setting turns all libpng options off then -# turns on those required for this minimal build. -# The CPP_FLAGS setting causes pngusr.h to be included in -# both the build of pnglibconf.h and, subsequently, when -# building libpng itself. -$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\ - $(PNGSRC)/scripts/pnglibconf.dfa \ - $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa - $(RM) pnglibconf.h pnglibconf.dfn - $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ - srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\ - DFA_XTRA="pngusr.dfa" $@ - -clean: - $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ - srcdir=$(PNGSRC) clean - $(RM) pnm2pngm$(O) - $(RM) pnm2pngm$(E) - $(RM) $(OBJS) - -# distclean also removes the copied source and headers -distclean: clean - $(RM) -r scripts # historical reasons - $(RM) $(PNGSRCS) $(PNGH) - $(RM) $(ZSRCS) $(ZH) $(ZCONF) - $(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS) - -# Header file dependencies: -$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC) -$(PNGOBJS): $(PNGHDRS) $(ZINC) -$(ZOBJS): $(ZHDRS) - -# Gather the source code from the respective directories -$(PNGSRCS) $(PNGH): $(PNGSRC)/$@ - $(RM) $@ - $(COPY) $(PNGSRC)/$@ $@ - -# No dependency on the ZLIBSRC target so that it only needs -# to be specified once. -$(ZSRCS) $(ZH): - $(RM) $@ - $(COPY) $(ZLIBSRC)/$@ $@ - -# The unconfigured zconf.h varies in name according to the -# zlib release -$(ZCONF): - $(RM) $@ - @for f in zconf.h.in zconf.in.h zconf.h; do\ - test -r $(ZLIBSRC)/$$f &&\ - echo $(COPY) $(ZLIBSRC)/$$f $@ &&\ - $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\ - done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1 - -pnm2pngm.c: $(PROGSRC)/pnm2png.c - $(RM) $@ - $(COPY) $(PROGSRC)/pnm2png.c $@ - -# End of makefile for pnm2pngm diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/pngusr.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/pngusr.dfa deleted file mode 100644 index 1fc24f3f2a8..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/pngusr.dfa +++ /dev/null @@ -1,39 +0,0 @@ -# pngminim/encoder/pngusr.dfa -# -# Copyright (c) 2010-2013 Glenn Randers-Pehrson -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# First all the build options off: - -everything = off - -# Switch on the write code - this makes a minimalist encoder - -option WRITE on - -# These 2 options are required if you need to read PBM (P1 or P4) files. -option WRITE_INVERT on -option WRITE_PACK on - -# You must choose fixed or floating point arithmetic: -# option FLOATING_POINT on - -option FIXED_POINT on - -# You must chose the internal fixed point implementation or to -# use the system floating point. The latter is considerably -# smaller (by about 1kbyte on an x86 system): -# option FLOATING_ARITHMETIC on - -option FLOATING_ARITHMETIC off - -# Your program will probably need other options. The example -# program here, pnm2pngm, requires the following. Take a look -# at pnglibconf.h to find out the full set of what has to be -# enabled to make the following work. - -option SETJMP on -option STDIO on diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/pngusr.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/pngusr.h deleted file mode 100644 index 997d44fe904..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/encoder/pngusr.h +++ /dev/null @@ -1,23 +0,0 @@ -/* minwrpngconf.h: headers to make a minimal png-write-only library - * - * Copyright (c) 2007, 2010-2013 Glenn Randers-Pehrson - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Derived from pngcrush.h, Copyright 1998-2007, Glenn Randers-Pehrson - */ - -#ifndef MINWRPNGCONF_H -#define MINWRPNGCONF_H - -/* To include pngusr.h set -DPNG_USER_CONFIG in CPPFLAGS */ - -/* List options to turn off features of the build that do not - * affect the API (so are not recorded in pnglibconf.h) - */ - -#define PNG_ALIGN_TYPE PNG_ALIGN_NONE - -#endif /* MINWRPNGCONF_H */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/README deleted file mode 100644 index faa83560a72..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/README +++ /dev/null @@ -1,15 +0,0 @@ -This demonstrates the use of PNG_USER_CONFIG and pngusr.h - -The makefile builds a minimal read-only progressive decoder with -embedded libpng, zlib and your system's X library. - -Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC -on the make command line. - -Edit makefile if required, to find your X library and include files, -then - - make ZLIBSRC=directory - -If you prefer to use the shared libraries, go to contrib/gregbook -and build the rpng2-x application there. diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/makefile b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/makefile deleted file mode 100644 index b625199114c..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/makefile +++ /dev/null @@ -1,166 +0,0 @@ -# Makefile for PngMinus (rpng2) -# Linux / Unix - -#CC=cc -CC=gcc -LD=$(CC) - -# If awk fails try -# make AWK=nawk - -# If cpp fails try -# make CPP=/lib/cpp - -RM=rm -f -COPY=cp - -#XINC = -I/usr/include # old-style, stock X distributions -#XLIB = -L/usr/lib/X11 -lX11 # (including SGI IRIX) - -#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows) -#XLIB = -L/usr/openwin/lib -lX11 - -XINC = -I/usr/X11R6/include # new X distributions (X.org, etc.) -XLIB = -L/usr/X11R6/lib -lX11 -#XLIB = -L/usr/X11R6/lib64 -lX11 # e.g., Red Hat on AMD64 - -#XINC = -I/usr/local/include # FreeBSD -#XLIB = -L/usr/local/lib -lX11 - -#LIBS = $(XLIB) -LIBS = $(XLIB) -lm #platforms that need libm - -CPPFLAGS=-I. $(XINC) -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP -CFLAGS=-O1 -Wall - -C=.c -O=.o -L=.a -E= - -# Where to find the source code: -PNGSRC =../../.. -ZLIBSRC=$(PNGSRC)/../zlib -PROGSRC=$(PNGSRC)/contrib/gregbook - -# Zlib (minimal inflate requirements - crc32 is used by libpng) -# zutil can be eliminated if you provide your own zcalloc and zcfree -ZSRCS = adler32$(C) crc32$(C) \ - inffast$(C) inflate$(C) inftrees$(C) \ - zutil$(C) - -# Standard headers -ZH = zlib.h crc32.h inffast.h inffixed.h \ - inflate.h inftrees.h zutil.h - -# Machine generated headers -ZCONF = zconf.h - -# Headers callers use -ZINC = zlib.h $(ZCONF) - -# Headers the Zlib source uses -ZHDRS = $(ZH) $(ZCONF) - -ZOBJS = adler32$(O) crc32$(O) \ - inffast$(O) inflate$(O) inftrees$(O) \ - zutil$(O) - -# libpng -PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \ - pngpread$(C) pngread$(C) pngrio$(C) pngrtran$(C) pngrutil$(C) \ - pngset$(C) pngtrans$(C) - -# Standard headers -PNGH =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h - -# Machine generated headers -PNGCONF=pnglibconf.h - -# Headers callers use -PNGINC= png.h pngconf.h pngusr.h $(PNGCONF) - -# Headers the PNG library uses -PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h - -PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \ - pngpread$(O) pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \ - pngset$(O) pngtrans$(O) - -PROGSRCS= rpng2-x$(C) readpng2$(C) -PROGHDRS= readpng2.h -PROGDOCS= COPYING LICENSE -PROGOBJS= rpng2-x$(O) readpng2$(O) - -OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS) - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - -# dependencies - -all: $(PROGDOCS) rpng2-x$(E) - -rpng2-x$(E): $(OBJS) - $(LD) -o rpng2-x$(E) $(OBJS) $(LIBS) - -# The DFA_XTRA setting turns all libpng options off then -# turns on those required for this minimal build. -# The CPP_FLAGS setting causes pngusr.h to be included in -# both the build of pnglibconf.h and, subsequently, when -# building libpng itself. -$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\ - $(PNGSRC)/scripts/pnglibconf.dfa \ - $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa - $(RM) pnglibconf.h pnglibconf.dfn - $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ - srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\ - DFA_XTRA="pngusr.dfa" $@ - -clean: - $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ - srcdir=$(PNGSRC) clean - $(RM) rpng2-x$(O) - $(RM) rpng2-x$(E) - $(RM) $(OBJS) - -# distclean also removes the copied source and headers -distclean: clean - $(RM) -r scripts # historical reasons - $(RM) $(PNGSRCS) $(PNGH) - $(RM) $(ZSRCS) $(ZH) $(ZCONF) - $(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS) - -# Header file dependencies: -$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC) -$(PNGOBJS): $(PNGHDRS) $(ZINC) -$(ZOBJS): $(ZHDRS) - -# Gather the source code from the respective directories -$(PNGSRCS) $(PNGH): $(PNGSRC)/$@ - $(RM) $@ - $(COPY) $(PNGSRC)/$@ $@ - -# No dependency on the ZLIBSRC target so that it only needs -# to be specified once. -$(ZSRCS) $(ZH): - $(RM) $@ - $(COPY) $(ZLIBSRC)/$@ $@ - -# The unconfigured zconf.h varies in name according to the -# zlib release -$(ZCONF): - $(RM) $@ - @for f in zconf.h.in zconf.in.h zconf.h; do\ - test -r $(ZLIBSRC)/$$f &&\ - echo $(COPY) $(ZLIBSRC)/$$f $@ &&\ - $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\ - done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1 - -$(PROGSRCS) $(PROGHDRS) $(PROGDOCS): $(PROGSRC)/$@ - $(RM) $@ - $(COPY) $(PROGSRC)/$@ $@ - -# End of makefile for rpng2-x diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/pngusr.dfa b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/pngusr.dfa deleted file mode 100644 index ac297f41bd7..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/pngusr.dfa +++ /dev/null @@ -1,40 +0,0 @@ -# pngminim/preader/pngusr.dfa -# -# Copyright (c) 2010-2013 Glenn Randers-Pehrson -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# First all the build options off: - -everything = off - -# Just switch on the progressive read code - -option PROGRESSIVE_READ on - -# You may choose fixed or floating point APIs: -# option FLOATING_POINT on - -option FIXED_POINT on - -# You must chose the internal fixed point implementation or to -# use the system floating point. The latter is considerably -# smaller (by about 1kbyte on an x86 system): - -option FLOATING_ARITHMETIC on -# option FLOATING_ARITHMETIC off - -# Your program will probably need other options. The example -# program here, rpng2-x, requires the following. Take a look -# at pnglibconf.h to find out the full set of what has to be -# enabled to make the following work. - -option SETJMP on -option STDIO on -option READ_bKGD on -option READ_GAMMA on -option READ_EXPAND on -option READ_STRIP_16_TO_8 on -option READ_GRAY_TO_RGB on diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/pngusr.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/pngusr.h deleted file mode 100644 index 80db3bb1719..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminim/preader/pngusr.h +++ /dev/null @@ -1,23 +0,0 @@ -/* minrdpngconf.h: headers to make a minimal png-read-only library - * - * Copyright (c) 2009, 2010-2013 Glenn Randers-Pehrson - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Derived from pngcrush.h, Copyright 1998-2007, Glenn Randers-Pehrson - */ - -#ifndef MINPRDPNGCONF_H -#define MINPRDPNGCONF_H - -/* To include pngusr.h set -DPNG_USER_CONFIG in CPPFLAGS */ - -/* List options to turn off features of the build that do not - * affect the API (so are not recorded in pnglibconf.h) - */ - -#define PNG_ALIGN_TYPE PNG_ALIGN_NONE - -#endif /* MINPRDPNGCONF_H */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/README deleted file mode 100644 index bbe7407ecce..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/README +++ /dev/null @@ -1,153 +0,0 @@ -PngMinus --------- -(copyright Willem van Schaik, 1999) - - -License -------- - -Permission to use, copy, modify, and distribute this software and -its documentation for any purpose and without fee is hereby granted, -provided that the above copyright notice appear in all copies and -that both that copyright notice and this permission notice appear in -supporting documentation. This software is provided "as is" without -express or implied warranty. - - -Some history ------------- -Soon after the creation of PNG in 1995, the need was felt for a set of -pnmtopng / pngtopnm utilities. Independantly Alexander Lehmann and I -(Willem van Schaik) started such a project. Luckily we discovered this -and merged the two together into pnmtopng.tar.gz, which is available -from a/o ftp://ftp.simplesystems.org/pub/libpng/png/. - -These two utilities have many, many options and make use of most of the -features of PNG, like gamma, alpha, sbit, text-chunks, etc. This makes -the utilities quite complex and by now not anymore very maintainable. -When we wrote these programs, libpng was still in an early stage. -Therefore, lots of the functionality that we put in our software can now -be done using transform-functions in libpng. - -Finally, to compile these programs, you need to have installed and -compiled three libraries: libpng, zlib and netpbm. Especially the latter -makes the whole setup a bit bulky. But that's unavoidable given the many -features of pnmtopng. - - -What now --------- -At this moment libpng is in a very stable state and can do much of the -work done in pnmtopng. Also, pnmtopng needs to be upgraded to the new -interface of libpng. Hence, it is time for a rewrite from the ground up -of pnmtopng and pngtopnm. This will happen in the near future (stay -tuned). The new package will get a different name to distinguish it from -the old one: PngPlus. - -To experiment a bit with the new interface of libpng, I started off with -a small prototype that contains only the basic functionality. It doesn't -have any of the options to read or write special chunks and it will do -no gamma correction. But this makes it also a simple program that is -quite easy to understand and can serve well as a template for other -software developments. (By now there are of course a couple of programs, -like Greg Roelofs' rpng/wpng, that can be used just as good.) - - -Can and can not ---------------- -As this is the small brother of the future PngPlus, I called this fellow -PngMinus. Because I started this development in good-old Turbo-C, I -avoided the use the netpbm library, which requires DOS extenders. Again, -another reason to call it PngMinus (minus netpbm :-). So, part of the -program are some elementary routines to read / write pgm- and ppm-files. -It does not read b&w pbm-files. - -The downside of this approach is that you can not use them on images -that require blocks of memory bigger than 64k (the DOS version). For -larger images you will get an out-of-memory error. - -As said before, PngMinus doesn't correct for gamma. When reading -png-files you can do this just as well by piping the output of png2pnm -to pnmgamma, one of the standard PbmPlus tools. This same scenario will -most probably also be followed in the full-blown future PngPlus, with -the addition of course of the possibility to create gamma-chunks when -writing png-files. - -On the other hand it supports alpha-channels. When reading a png-image -you can write the alpha-channel into a pgm-file. And when creating an -RGB+A png-image, you just combine a ppm-file with a corresponding -pgm-file containing the alpha-channel. When reading, transparency chunks -are converted into an alpha-channel and from there on treated the same -way. - -Finally you can opt for writing ascii or binary pgm- and ppm-files. When -the bit-depth is 16, the format will always be ascii. - - -Using it --------- -To distinguish them from pnmtopng and PngPlus, the utilities are named -png2pnm and pnm2png (2 instead of to). The input- and output-files can -be given as parameters or through redirection. Therefore the programs -can be part of a pipe. - -To list the options type "png2pnm -h" or "pnm2png -h". - - -Just like Scandinavian furniture --------------------------------- -You have to put it together yourself. I did test the software under -MS-DOS with Turbo-C 3.0 and under RedHat Linux 4.2 with gcc. In both -cases I used libpng-1.0.4 and zlib-1.1.3. Later versions should be OK, -however some older libpng versions have a bug in pngmem.c when using -Turbo-C 3.0 (see below). - -You can build it using one of the two makefiles (make -f makefile.###) -or use the batch/script files pngminus.bat / pngminus.sh. This assumes -that you have built the libraries in ../libpng and ../zlib. Using Linux, -make sure that you have built libpng with makefile.std and not -makefile.linux (also called .lnx in earlier versions of libpng). The -latter creates a .so shared-library, while the PngMinus makefile assumes -a normal .a static library. - -If you create a ../pngsuite directory and then store the basn####.png -files from PngSuite (http://www.schaik.com/pngsuite/) in there, you can -test in one go the proper functioning of PngMinus, see png2pnm.bat and -pnm2png.bat (or the .sh versions). - - -Warranty -------- -Please, remember that this was just a small experiment to learn a few -things. It will have many unforeseen features <vbg>. Who said bugs? Use -it when you are in need for something simple or when you want to start -developing your own stuff. - - -The Turbo bug -------------- -** pngmem.old - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr += 16L; -** pngmem.c - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr = hptr + 16L; -** - -** pngmem.old - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr += (png_uint_32)65536L; -** pngmem.c - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr = hptr + 65536L; -** - - -The end -------- -Willem van Schaik -mailto:willem@schaik.com -http://www.schaik.com/png/ -------- -Oct 1999 - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makefile.std b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makefile.std deleted file mode 100644 index 14e25cd64ff..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makefile.std +++ /dev/null @@ -1,66 +0,0 @@ -# Makefile for PngMinus (png2pnm and pnm2png) -# Linux / Unix - -#CC=cc -CC=gcc -LD=$(CC) - -RM=rm -f - -#PNGPATH = /usr/local -#PNGINC = -I$(PNGPATH)/include/libpng16 -#PNGLIB = -L$(PNGPATH)/lib -lpng16 -#PNGLIBS = $(PNGPATH)/lib/libpng16.a -PNGINC = -I../.. -PNGLIB = -L../.. -lpng -PNGLIBS = ../../libpng.a - -#ZPATH = /usr/local -#ZINC = -I$(ZPATH)/include -#ZLIB = -L$(ZPATH)/lib -lz -#ZLIBS = $(ZPATH)/lib/libz.a -ZINC = -I../../../zlib -ZLIB = -L../../../zlib -lz -ZLIBS = ../../../zlib/libz.a - -CPPFLAGS=$(PNGINC) $(ZINC) -CFLAGS= -LDLIBS=$(PNGLIB) $(ZLIB) -LDLIBSS=$(PNGLIBS) $(ZLIBS) -C=.c -O=.o -L=.a -E= - -# dependencies - -#all: png2pnm$(E) pnm2png$(E) -all: png2pnm$(E) pnm2png$(E) png2pnm-static$(E) pnm2png-static$(E) - -png2pnm$(O): png2pnm$(C) - $(CC) -c $(CPPFLAGS) $(CFLAGS) png2pnm$(C) - -png2pnm$(E): png2pnm$(O) - $(LD) $(LDFLAGS) -o png2pnm$(E) png2pnm$(O) $(LDLIBS) -lm - -png2pnm-static$(E): png2pnm$(O) - $(LD) $(LDFLAGS) -o png2pnm-static$(E) png2pnm$(O) $(LDLIBSS) -lm - -pnm2png$(O): pnm2png$(C) - $(CC) -c $(CPPFLAGS) $(CFLAGS) pnm2png$(C) - -pnm2png$(E): pnm2png$(O) - $(LD) $(LDFLAGS) -o pnm2png$(E) pnm2png$(O) $(LDLIBS) -lm - -pnm2png-static$(E): pnm2png$(O) - $(LD) $(LDFLAGS) -o pnm2png-static$(E) pnm2png$(O) $(LDLIBSS) -lm - -clean: - $(RM) png2pnm$(O) - $(RM) pnm2png$(O) - $(RM) png2pnm$(E) - $(RM) pnm2png$(E) - $(RM) png2pnm-static$(E) - $(RM) pnm2png-static$(E) - -# End of makefile for png2pnm / pnm2png diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makefile.tc3 b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makefile.tc3 deleted file mode 100644 index 6a2f4b9853f..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makefile.tc3 +++ /dev/null @@ -1,38 +0,0 @@ -# Makefile for PngMinus (png2pnm and pnm2png) -# TurboC++ 3.0 - -CC=tcc -Ic:\tc3\inc -LD=tcc -Lc:\tc3\lib -LB=tlib -RM=del -CP=copy -MODEL=l -CPPFLAGS=-I..\libpng -I..\zlib -CFLAGS=-O -m$(MODEL) -LDFLAGS=-m$(MODEL) -L..\libpng -L..\zlib -C=.c -O=.obj -L=.lib -E=.exe - -# dependencies - -all: png2pnm$(E) pnm2png$(E) - -png2pnm$(O): png2pnm$(C) - $(CC) -c $(CPPFLAGS) $(CFLAGS) png2pnm$(C) - -png2pnm$(E): png2pnm$(O) - $(LD) $(LDFLAGS) png2pnm$(O) libpng$(L) zlib$(L) - -pnm2png$(O): pnm2png$(C) - $(CC) -c $(CPPFLAGS) $(CFLAGS) pnm2png$(C) - -pnm2png$(E): pnm2png$(O) - $(LD) $(LDFLAGS) pnm2png$(O) libpng$(L) zlib$(L) - -clean: - $(RM) *$(O) - $(RM) *$(E) - -# End of makefile for png2pnm / pnm2png diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makevms.com b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makevms.com deleted file mode 100644 index 00561bcd0d7..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/makevms.com +++ /dev/null @@ -1,92 +0,0 @@ -$!------------------------------------------------------------------------------ -$! make Contrib programs of libpng under OpenVMS -$! -$! -$! Look for the compiler used -$! -$ zlibsrc = "[---.zlib]" -$ ccopt="/include=(''zlibsrc',[--])" -$ if f$getsyi("HW_MODEL").ge.1024 -$ then -$ ccopt = "/prefix=all"+ccopt -$ comp = "__decc__=1" -$ if f$trnlnm("SYS").eqs."" then define sys sys$library: -$ else -$ if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs."" -$ then -$ if f$trnlnm("SYS").eqs."" then define sys sys$library: -$ if f$search("SYS$SYSTEM:VAXC.EXE").eqs."" -$ then -$ comp = "__gcc__=1" -$ CC :== GCC -$ else -$ comp = "__vaxc__=1" -$ endif -$ else -$ if f$trnlnm("SYS").eqs."" then define sys decc$library_include: -$ ccopt = "/decc/prefix=all"+ccopt -$ comp = "__decc__=1" -$ endif -$ endif -$ open/write lopt lib.opt -$ write lopt "[--]libpng.olb/lib" -$ write lopt "''zlibsrc'libz.olb/lib" -$ close lopt -$ open/write xopt x11.opt -$ write xopt "sys$library:decw$xlibshr.exe/share" -$ close xopt -$ write sys$output "Compiling PNG contrib programs ..." -$ write sys$output "Building pnm2png..." -$ CALL MAKE pnm2png.OBJ "cc ''CCOPT' pnm2png" - - pnm2png.c -$ call make pnm2png.exe - - "LINK pnm2png,lib.opt/opt" - - pnm2png.obj -$ write sys$output "Building png2pnm..." -$ CALL MAKE png2pnm.OBJ "cc ''CCOPT' png2pnm" - - png2pnm.c -$ call make png2pnm.exe - - "LINK png2pnm,lib.opt/opt" - - png2pnm.obj -$ exit -$! -$! -$MAKE: SUBROUTINE !SUBROUTINE TO CHECK DEPENDENCIES -$ V = 'F$Verify(0) -$! P1 = What we are trying to make -$! P2 = Command to make it -$! P3 - P8 What it depends on -$ -$ If F$Search(P1) .Eqs. "" Then Goto Makeit -$ Time = F$CvTime(F$File(P1,"RDT")) -$arg=3 -$Loop: -$ Argument = P'arg -$ If Argument .Eqs. "" Then Goto Exit -$ El=0 -$Loop2: -$ File = F$Element(El," ",Argument) -$ If File .Eqs. " " Then Goto Endl -$ AFile = "" -$Loop3: -$ OFile = AFile -$ AFile = F$Search(File) -$ If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl -$ If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit -$ Goto Loop3 -$NextEL: -$ El = El + 1 -$ Goto Loop2 -$EndL: -$ arg=arg+1 -$ If arg .Le. 8 Then Goto Loop -$ Goto Exit -$ -$Makeit: -$ VV=F$VERIFY(0) -$ write sys$output P2 -$ 'P2 -$ VV='F$Verify(VV) -$Exit: -$ If V Then Set Verify -$ENDSUBROUTINE diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.bat b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.bat deleted file mode 100644 index 449cf36750b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.bat +++ /dev/null @@ -1,41 +0,0 @@ -REM -- grayscale -png2pnm.exe -noraw ..\pngsuite\basn0g01.png basn0g01.pgm -png2pnm.exe -noraw ..\pngsuite\basn0g02.png basn0g02.pgm -png2pnm.exe -noraw ..\pngsuite\basn0g04.png basn0g04.pgm -png2pnm.exe -noraw ..\pngsuite\basn0g08.png basn0g08.pgm -png2pnm.exe -noraw ..\pngsuite\basn0g16.png basn0g16.pgm -REM -- full-color -png2pnm.exe -noraw ..\pngsuite\basn2c08.png basn2c08.ppm -png2pnm.exe -noraw ..\pngsuite\basn2c16.png basn2c16.ppm -REM -- palletted -png2pnm.exe -noraw ..\pngsuite\basn3p01.png basn3p01.ppm -png2pnm.exe -noraw ..\pngsuite\basn3p02.png basn3p02.ppm -png2pnm.exe -noraw ..\pngsuite\basn3p04.png basn3p04.ppm -png2pnm.exe -noraw ..\pngsuite\basn3p08.png basn3p08.ppm -REM -- gray with alpha-channel -png2pnm.exe -noraw ..\pngsuite\basn4a08.png basn4a08.pgm -png2pnm.exe -noraw ..\pngsuite\basn4a16.png basn4a16.pgm -REM -- color with alpha-channel -png2pnm.exe -noraw -alpha basn6a08.pgm ..\pngsuite\basn6a08.png basn6a08.ppm -png2pnm.exe -noraw -alpha basn6a16.pgm ..\pngsuite\basn6a16.png basn6a16.ppm -REM -- grayscale -png2pnm.exe -raw ..\pngsuite\basn0g01.png rawn0g01.pgm -png2pnm.exe -raw ..\pngsuite\basn0g02.png rawn0g02.pgm -png2pnm.exe -raw ..\pngsuite\basn0g04.png rawn0g04.pgm -png2pnm.exe -raw ..\pngsuite\basn0g08.png rawn0g08.pgm -png2pnm.exe -raw ..\pngsuite\basn0g16.png rawn0g16.pgm -REM -- full-color -png2pnm.exe -raw ..\pngsuite\basn2c08.png rawn2c08.ppm -png2pnm.exe -raw ..\pngsuite\basn2c16.png rawn2c16.ppm -REM -- palletted -png2pnm.exe -raw ..\pngsuite\basn3p01.png rawn3p01.ppm -png2pnm.exe -raw ..\pngsuite\basn3p02.png rawn3p02.ppm -png2pnm.exe -raw ..\pngsuite\basn3p04.png rawn3p04.ppm -png2pnm.exe -raw ..\pngsuite\basn3p08.png rawn3p08.ppm -REM -- gray with alpha-channel -png2pnm.exe -raw ..\pngsuite\basn4a08.png rawn4a08.pgm -png2pnm.exe -raw ..\pngsuite\basn4a16.png rawn4a16.pgm -REM -- color with alpha-channel -png2pnm.exe -noraw -alpha rawn6a08.pgm ..\pngsuite\basn6a08.png rawn6a08.ppm -png2pnm.exe -noraw -alpha rawn6a16.pgm ..\pngsuite\basn6a16.png rawn6a16.ppm - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.c deleted file mode 100644 index dff4d0b3d04..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.c +++ /dev/null @@ -1,438 +0,0 @@ -/* - * png2pnm.c --- conversion from PNG-file to PGM/PPM-file - * copyright (C) 1999 by Willem van Schaik <willem@schaik.com> - * - * version 1.0 - 1999.10.15 - First version. - * - * Permission to use, copy, modify, and distribute this software and - * its documentation for any purpose and without fee is hereby granted, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear in - * supporting documentation. This software is provided "as is" without - * express or implied warranty. - */ - -#include <stdio.h> -#include <stdlib.h> -#ifdef __TURBOC__ -#include <mem.h> -#include <fcntl.h> -#endif -#include <zlib.h> - -#ifndef BOOL -#define BOOL unsigned char -#endif -#ifndef TRUE -#define TRUE (BOOL) 1 -#endif -#ifndef FALSE -#define FALSE (BOOL) 0 -#endif - -#ifdef __TURBOC__ -#define STDIN 0 -#define STDOUT 1 -#define STDERR 2 -#endif - -/* to make png2pnm verbose so we can find problems (needs to be before png.h) */ -#ifndef PNG_DEBUG -#define PNG_DEBUG 0 -#endif - -#include "png.h" - -/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - -/* function prototypes */ - -int main (int argc, char *argv[]); -void usage (); -BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, - BOOL alpha); - -/* - * main - */ - -int main(int argc, char *argv[]) -{ - FILE *fp_rd = stdin; - FILE *fp_wr = stdout; - FILE *fp_al = NULL; - BOOL raw = TRUE; - BOOL alpha = FALSE; - int argi; - - for (argi = 1; argi < argc; argi++) - { - if (argv[argi][0] == '-') - { - switch (argv[argi][1]) - { - case 'n': - raw = FALSE; - break; - case 'r': - raw = TRUE; - break; - case 'a': - alpha = TRUE; - argi++; - if ((fp_al = fopen (argv[argi], "wb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: can not create alpha-channel file %s\n", - argv[argi]); - exit (1); - } - break; - case 'h': - case '?': - usage(); - exit(0); - break; - default: - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: unknown option %s\n", argv[argi]); - usage(); - exit(1); - break; - } /* end switch */ - } - else if (fp_rd == stdin) - { - if ((fp_rd = fopen (argv[argi], "rb")) == NULL) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); - exit (1); - } - } - else if (fp_wr == stdout) - { - if ((fp_wr = fopen (argv[argi], "wb")) == NULL) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: can not create file %s\n", argv[argi]); - exit (1); - } - } - else - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: too many parameters\n"); - usage(); - exit(1); - } - } /* end for */ - -#ifdef __TURBOC__ - /* set stdin/stdout if required to binary */ - if (fp_rd == stdin) - { - setmode (STDIN, O_BINARY); - } - if ((raw) && (fp_wr == stdout)) - { - setmode (STDOUT, O_BINARY); - } -#endif - - /* call the conversion program itself */ - if (png2pnm (fp_rd, fp_wr, fp_al, raw, alpha) == FALSE) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: unsuccessful conversion of PNG-image\n"); - exit(1); - } - - /* close input file */ - fclose (fp_rd); - /* close output file */ - fclose (fp_wr); - /* close alpha file */ - if (alpha) - fclose (fp_al); - - return 0; -} - -/* - * usage - */ - -void usage() -{ - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, " by Willem van Schaik, 1999\n"); -#ifdef __TURBOC__ - fprintf (stderr, " for Turbo-C and Borland-C compilers\n"); -#else - fprintf (stderr, " for Linux (and Unix) compilers\n"); -#endif - fprintf (stderr, "Usage: png2pnm [options] <file>.png [<file>.pnm]\n"); - fprintf (stderr, " or: ... | png2pnm [options]\n"); - fprintf (stderr, "Options:\n"); - fprintf (stderr, - " -r[aw] write pnm-file in binary format (P4/P5/P6) (default)\n"); - fprintf (stderr, " -n[oraw] write pnm-file in ascii format (P1/P2/P3)\n"); - fprintf (stderr, - " -a[lpha] <file>.pgm write PNG alpha channel as pgm-file\n"); - fprintf (stderr, " -h | -? print this help-information\n"); -} - -/* - * png2pnm - */ - -BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, - volatile BOOL raw, BOOL alpha) -{ - png_struct *png_ptr = NULL; - png_info *info_ptr = NULL; - png_byte buf[8]; - png_byte *png_pixels = NULL; - png_byte **row_pointers = NULL; - png_byte *pix_ptr = NULL; - png_uint_32 row_bytes; - - png_uint_32 width; - png_uint_32 height; - int bit_depth; - int channels; - int color_type; - int alpha_present; - int row, col; - int ret; - int i; - long dep_16; - - /* read and check signature in PNG file */ - ret = fread (buf, 1, 8, png_file); - if (ret != 8) - return FALSE; - - ret = png_sig_cmp (buf, 0, 8); - if (ret) - return FALSE; - - /* create png and info structures */ - - png_ptr = png_create_read_struct (png_get_libpng_ver(NULL), - NULL, NULL, NULL); - if (!png_ptr) - return FALSE; /* out of memory */ - - info_ptr = png_create_info_struct (png_ptr); - if (!info_ptr) - { - png_destroy_read_struct (&png_ptr, NULL, NULL); - return FALSE; /* out of memory */ - } - - if (setjmp (png_jmpbuf(png_ptr))) - { - png_destroy_read_struct (&png_ptr, &info_ptr, NULL); - return FALSE; - } - - /* set up the input control for C streams */ - png_init_io (png_ptr, png_file); - png_set_sig_bytes (png_ptr, 8); /* we already read the 8 signature bytes */ - - /* read the file information */ - png_read_info (png_ptr, info_ptr); - - /* get size and bit-depth of the PNG-image */ - png_get_IHDR (png_ptr, info_ptr, - &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - - /* set-up the transformations */ - - /* transform paletted images into full-color rgb */ - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_expand (png_ptr); - /* expand images to bit-depth 8 (only applicable for grayscale images) */ - if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - png_set_expand (png_ptr); - /* transform transparency maps into full alpha-channel */ - if (png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand (png_ptr); - -#ifdef NJET - /* downgrade 16-bit images to 8 bit */ - if (bit_depth == 16) - png_set_strip_16 (png_ptr); - /* transform grayscale images into full-color */ - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb (png_ptr); - /* only if file has a file gamma, we do a correction */ - if (png_get_gAMA (png_ptr, info_ptr, &file_gamma)) - png_set_gamma (png_ptr, (double) 2.2, file_gamma); -#endif - - /* all transformations have been registered; now update info_ptr data, - * get rowbytes and channels, and allocate image memory */ - - png_read_update_info (png_ptr, info_ptr); - - /* get the new color-type and bit-depth (after expansion/stripping) */ - png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - - /* check for 16-bit files */ - if (bit_depth == 16) - { - raw = FALSE; -#ifdef __TURBOC__ - pnm_file->flags &= ~((unsigned) _F_BIN); -#endif - } - - /* calculate new number of channels and store alpha-presence */ - if (color_type == PNG_COLOR_TYPE_GRAY) - channels = 1; - else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - channels = 2; - else if (color_type == PNG_COLOR_TYPE_RGB) - channels = 3; - else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - channels = 4; - else - channels = 0; /* should never happen */ - alpha_present = (channels - 1) % 2; - - /* check if alpha is expected to be present in file */ - if (alpha && !alpha_present) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: PNG-file doesn't contain alpha channel\n"); - exit (1); - } - - /* row_bytes is the width x number of channels x (bit-depth / 8) */ - row_bytes = png_get_rowbytes (png_ptr, info_ptr); - - if ((png_pixels = (png_byte *) - malloc (row_bytes * height * sizeof (png_byte))) == NULL) { - png_destroy_read_struct (&png_ptr, &info_ptr, NULL); - return FALSE; - } - - if ((row_pointers = (png_byte **) - malloc (height * sizeof (png_bytep))) == NULL) - { - png_destroy_read_struct (&png_ptr, &info_ptr, NULL); - free (png_pixels); - png_pixels = NULL; - return FALSE; - } - - /* set the individual row_pointers to point at the correct offsets */ - for (i = 0; i < ((int) height); i++) - row_pointers[i] = png_pixels + i * row_bytes; - - /* now we can go ahead and just read the whole image */ - png_read_image (png_ptr, row_pointers); - - /* read rest of file, and get additional chunks in info_ptr - REQUIRED */ - png_read_end (png_ptr, info_ptr); - - /* clean up after the read, and free any memory allocated - REQUIRED */ - png_destroy_read_struct (&png_ptr, &info_ptr, (png_infopp) NULL); - - /* write header of PNM file */ - - if ((color_type == PNG_COLOR_TYPE_GRAY) || - (color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) - { - fprintf (pnm_file, "%s\n", (raw) ? "P5" : "P2"); - fprintf (pnm_file, "%d %d\n", (int) width, (int) height); - fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); - } - else if ((color_type == PNG_COLOR_TYPE_RGB) || - (color_type == PNG_COLOR_TYPE_RGB_ALPHA)) - { - fprintf (pnm_file, "%s\n", (raw) ? "P6" : "P3"); - fprintf (pnm_file, "%d %d\n", (int) width, (int) height); - fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); - } - - /* write header of PGM file with alpha channel */ - - if ((alpha) && - ((color_type == PNG_COLOR_TYPE_GRAY_ALPHA) || - (color_type == PNG_COLOR_TYPE_RGB_ALPHA))) - { - fprintf (alpha_file, "%s\n", (raw) ? "P5" : "P2"); - fprintf (alpha_file, "%d %d\n", (int) width, (int) height); - fprintf (alpha_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); - } - - /* write data to PNM file */ - pix_ptr = png_pixels; - - for (row = 0; row < (int) height; row++) - { - for (col = 0; col < (int) width; col++) - { - for (i = 0; i < (channels - alpha_present); i++) - { - if (raw) - fputc ((int) *pix_ptr++ , pnm_file); - else - if (bit_depth == 16){ - dep_16 = (long) *pix_ptr++; - fprintf (pnm_file, "%ld ", (dep_16 << 8) + ((long) *pix_ptr++)); - } - else - fprintf (pnm_file, "%ld ", (long) *pix_ptr++); - } - if (alpha_present) - { - if (!alpha) - { - pix_ptr++; /* alpha */ - if (bit_depth == 16) - pix_ptr++; - } - else /* output alpha-channel as pgm file */ - { - if (raw) - fputc ((int) *pix_ptr++ , alpha_file); - else - if (bit_depth == 16){ - dep_16 = (long) *pix_ptr++; - fprintf (alpha_file, "%ld ", (dep_16 << 8) + (long) *pix_ptr++); - } - else - fprintf (alpha_file, "%ld ", (long) *pix_ptr++); - } - } /* if alpha_present */ - - if (!raw) - if (col % 4 == 3) - fprintf (pnm_file, "\n"); - } /* end for col */ - - if (!raw) - if (col % 4 != 0) - fprintf (pnm_file, "\n"); - } /* end for row */ - - if (row_pointers != (unsigned char**) NULL) - free (row_pointers); - if (png_pixels != (unsigned char*) NULL) - free (png_pixels); - - return TRUE; - -} /* end of source */ - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.sh b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.sh deleted file mode 100644 index b1c05370dff..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/png2pnm.sh +++ /dev/null @@ -1,42 +0,0 @@ -#!/bin/sh -# -- grayscale -./png2pnm -noraw ../pngsuite/basn0g01.png basn0g01.pgm -./png2pnm -noraw ../pngsuite/basn0g02.png basn0g02.pgm -./png2pnm -noraw ../pngsuite/basn0g04.png basn0g04.pgm -./png2pnm -noraw ../pngsuite/basn0g08.png basn0g08.pgm -./png2pnm -noraw ../pngsuite/basn0g16.png basn0g16.pgm -# -- full-color -./png2pnm -noraw ../pngsuite/basn2c08.png basn2c08.ppm -./png2pnm -noraw ../pngsuite/basn2c16.png basn2c16.ppm -# -- palletted -./png2pnm -noraw ../pngsuite/basn3p01.png basn3p01.ppm -./png2pnm -noraw ../pngsuite/basn3p02.png basn3p02.ppm -./png2pnm -noraw ../pngsuite/basn3p04.png basn3p04.ppm -./png2pnm -noraw ../pngsuite/basn3p08.png basn3p08.ppm -# -- gray with alpha-channel -./png2pnm -noraw ../pngsuite/basn4a08.png basn4a08.pgm -./png2pnm -noraw ../pngsuite/basn4a16.png basn4a16.pgm -# -- color with alpha-channel -./png2pnm -noraw -alpha basn6a08.pgm ../pngsuite/basn6a08.png basn6a08.ppm -./png2pnm -noraw -alpha basn6a16.pgm ../pngsuite/basn6a16.png basn6a16.ppm -# -- grayscale -./png2pnm -raw ../pngsuite/basn0g01.png rawn0g01.pgm -./png2pnm -raw ../pngsuite/basn0g02.png rawn0g02.pgm -./png2pnm -raw ../pngsuite/basn0g04.png rawn0g04.pgm -./png2pnm -raw ../pngsuite/basn0g08.png rawn0g08.pgm -./png2pnm -raw ../pngsuite/basn0g16.png rawn0g16.pgm -# -- full-color -./png2pnm -raw ../pngsuite/basn2c08.png rawn2c08.ppm -./png2pnm -raw ../pngsuite/basn2c16.png rawn2c16.ppm -# -- palletted -./png2pnm -raw ../pngsuite/basn3p01.png rawn3p01.ppm -./png2pnm -raw ../pngsuite/basn3p02.png rawn3p02.ppm -./png2pnm -raw ../pngsuite/basn3p04.png rawn3p04.ppm -./png2pnm -raw ../pngsuite/basn3p08.png rawn3p08.ppm -# -- gray with alpha-channel -./png2pnm -raw ../pngsuite/basn4a08.png rawn4a08.pgm -./png2pnm -raw ../pngsuite/basn4a16.png rawn4a16.pgm -# -- color with alpha-channel -./png2pnm -noraw -alpha rawn6a08.pgm ../pngsuite/basn6a08.png rawn6a08.ppm -./png2pnm -noraw -alpha rawn6a16.pgm ../pngsuite/basn6a16.png rawn6a16.ppm - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pngminus.bat b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pngminus.bat deleted file mode 100644 index 911bb8dff9e..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pngminus.bat +++ /dev/null @@ -1,4 +0,0 @@ -make -f makefile.tc3 -call png2pnm.bat -call pnm2png.bat - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pngminus.sh b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pngminus.sh deleted file mode 100644 index 2a0a9d8fbba..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pngminus.sh +++ /dev/null @@ -1,5 +0,0 @@ -#!/bin/sh -make -f makefile.std -sh png2pnm.sh -sh pnm2png.sh - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.bat b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.bat deleted file mode 100644 index f756cb84de4..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.bat +++ /dev/null @@ -1,41 +0,0 @@ -REM -- grayscale -pnm2png.exe basn0g01.pgm basn0g01.png -pnm2png.exe basn0g02.pgm basn0g02.png -pnm2png.exe basn0g04.pgm basn0g04.png -pnm2png.exe basn0g08.pgm basn0g08.png -pnm2png.exe basn0g16.pgm basn0g16.png -REM -- full-color -pnm2png.exe basn2c08.ppm basn2c08.png -pnm2png.exe basn2c16.ppm basn2c16.png -REM -- palletted -pnm2png.exe basn3p01.ppm basn3p01.png -pnm2png.exe basn3p02.ppm basn3p02.png -pnm2png.exe basn3p04.ppm basn3p04.png -pnm2png.exe basn3p08.ppm basn3p08.png -REM -- gray with alpha-channel -pnm2png.exe -alpha basn6a08.pgm basn4a08.pgm basn4a08.png -pnm2png.exe -alpha basn6a16.pgm basn4a16.pgm basn4a16.png -REM -- color with alpha-channel -pnm2png.exe -alpha basn6a08.pgm basn6a08.ppm basn6a08.png -pnm2png.exe -alpha basn6a16.pgm basn6a16.ppm basn6a16.png -REM -- grayscale -pnm2png.exe rawn0g01.pgm rawn0g01.png -pnm2png.exe rawn0g02.pgm rawn0g02.png -pnm2png.exe rawn0g04.pgm rawn0g04.png -pnm2png.exe rawn0g08.pgm rawn0g08.png -pnm2png.exe rawn0g16.pgm rawn0g16.png -REM -- full-color -pnm2png.exe rawn2c08.ppm rawn2c08.png -pnm2png.exe rawn2c16.ppm rawn2c16.png -REM -- palletted -pnm2png.exe rawn3p01.ppm rawn3p01.png -pnm2png.exe rawn3p02.ppm rawn3p02.png -pnm2png.exe rawn3p04.ppm rawn3p04.png -pnm2png.exe rawn3p08.ppm rawn3p08.png -REM -- gray with alpha-channel -pnm2png.exe -alpha rawn6a08.pgm rawn4a08.pgm rawn4a08.png -pnm2png.exe -alpha rawn6a16.pgm rawn4a16.pgm rawn4a16.png -REM -- color with alpha-channel -pnm2png.exe -alpha rawn6a08.pgm rawn6a08.ppm rawn6a08.png -pnm2png.exe -alpha rawn6a16.pgm rawn6a16.ppm rawn6a16.png - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.c deleted file mode 100644 index 7bf720f6813..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.c +++ /dev/null @@ -1,605 +0,0 @@ -/* - * pnm2png.c --- conversion from PBM/PGM/PPM-file to PNG-file - * copyright (C) 1999 by Willem van Schaik <willem@schaik.com> - * - * version 1.0 - 1999.10.15 - First version. - * - * Permission to use, copy, modify, and distribute this software and - * its documentation for any purpose and without fee is hereby granted, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear in - * supporting documentation. This software is provided "as is" without - * express or implied warranty. - */ - -#include <stdio.h> -#include <stdlib.h> -#ifdef __TURBOC__ -#include <mem.h> -#include <fcntl.h> -#endif -#include <zlib.h> - -#ifndef BOOL -#define BOOL unsigned char -#endif -#ifndef TRUE -#define TRUE (BOOL) 1 -#endif -#ifndef FALSE -#define FALSE (BOOL) 0 -#endif - -#define STDIN 0 -#define STDOUT 1 -#define STDERR 2 - -/* to make pnm2png verbose so we can find problems (needs to be before png.h) */ -#ifndef PNG_DEBUG -#define PNG_DEBUG 0 -#endif - -#include "png.h" - -/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - -/* function prototypes */ - -int main (int argc, char *argv[]); -void usage (); -BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, - BOOL alpha); -void get_token(FILE *pnm_file, char *token); -png_uint_32 get_data (FILE *pnm_file, int depth); -png_uint_32 get_value (FILE *pnm_file, int depth); - -/* - * main - */ - -int main(int argc, char *argv[]) -{ - FILE *fp_rd = stdin; - FILE *fp_al = NULL; - FILE *fp_wr = stdout; - BOOL interlace = FALSE; - BOOL alpha = FALSE; - int argi; - - for (argi = 1; argi < argc; argi++) - { - if (argv[argi][0] == '-') - { - switch (argv[argi][1]) - { - case 'i': - interlace = TRUE; - break; - case 'a': - alpha = TRUE; - argi++; - if ((fp_al = fopen (argv[argi], "rb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: alpha-channel file %s does not exist\n", - argv[argi]); - exit (1); - } - break; - case 'h': - case '?': - usage(); - exit(0); - break; - default: - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: unknown option %s\n", argv[argi]); - usage(); - exit(1); - break; - } /* end switch */ - } - else if (fp_rd == stdin) - { - if ((fp_rd = fopen (argv[argi], "rb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); - exit (1); - } - } - else if (fp_wr == stdout) - { - if ((fp_wr = fopen (argv[argi], "wb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: can not create PNG-file %s\n", argv[argi]); - exit (1); - } - } - else - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: too many parameters\n"); - usage(); - exit (1); - } - } /* end for */ - -#ifdef __TURBOC__ - /* set stdin/stdout to binary, we're reading the PNM always! in binary format */ - if (fp_rd == stdin) - { - setmode (STDIN, O_BINARY); - } - if (fp_wr == stdout) - { - setmode (STDOUT, O_BINARY); - } -#endif - - /* call the conversion program itself */ - if (pnm2png (fp_rd, fp_wr, fp_al, interlace, alpha) == FALSE) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: unsuccessful converting to PNG-image\n"); - exit (1); - } - - /* close input file */ - fclose (fp_rd); - /* close output file */ - fclose (fp_wr); - /* close alpha file */ - if (alpha) - fclose (fp_al); - - return 0; -} - -/* - * usage - */ - -void usage() -{ - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, " by Willem van Schaik, 1999\n"); -#ifdef __TURBOC__ - fprintf (stderr, " for Turbo-C and Borland-C compilers\n"); -#else - fprintf (stderr, " for Linux (and Unix) compilers\n"); -#endif - fprintf (stderr, "Usage: pnm2png [options] <file>.<pnm> [<file>.png]\n"); - fprintf (stderr, " or: ... | pnm2png [options]\n"); - fprintf (stderr, "Options:\n"); - fprintf (stderr, " -i[nterlace] write png-file with interlacing on\n"); - fprintf (stderr, - " -a[lpha] <file>.pgm read PNG alpha channel as pgm-file\n"); - fprintf (stderr, " -h | -? print this help-information\n"); -} - -/* - * pnm2png - */ - -BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, - BOOL alpha) -{ - png_struct *png_ptr = NULL; - png_info *info_ptr = NULL; - png_byte *png_pixels = NULL; - png_byte **row_pointers = NULL; - png_byte *pix_ptr = NULL; - volatile png_uint_32 row_bytes; - - char type_token[16]; - char width_token[16]; - char height_token[16]; - char maxval_token[16]; - volatile int color_type; - unsigned long ul_width=0, ul_alpha_width=0; - unsigned long ul_height=0, ul_alpha_height=0; - unsigned long ul_maxval=0; - volatile png_uint_32 width, height; - volatile png_uint_32 alpha_width, alpha_height; - png_uint_32 maxval; - volatile int bit_depth = 0; - int channels; - int alpha_depth = 0; - int alpha_present; - int row, col; - BOOL raw, alpha_raw = FALSE; -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - BOOL packed_bitmap = FALSE; -#endif - png_uint_32 tmp16; - int i; - - /* read header of PNM file */ - - get_token(pnm_file, type_token); - if (type_token[0] != 'P') - { - return FALSE; - } - else if ((type_token[1] == '1') || (type_token[1] == '4')) - { -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - raw = (type_token[1] == '4'); - color_type = PNG_COLOR_TYPE_GRAY; - get_token(pnm_file, width_token); - sscanf (width_token, "%lu", &ul_width); - width = (png_uint_32) ul_width; - get_token(pnm_file, height_token); - sscanf (height_token, "%lu", &ul_height); - height = (png_uint_32) ul_height; - bit_depth = 1; - packed_bitmap = TRUE; -#else - fprintf (stderr, "PNM2PNG built without PNG_WRITE_INVERT_SUPPORTED and \n"); - fprintf (stderr, "PNG_WRITE_PACK_SUPPORTED can't read PBM (P1,P4) files\n"); -#endif - } - else if ((type_token[1] == '2') || (type_token[1] == '5')) - { - raw = (type_token[1] == '5'); - color_type = PNG_COLOR_TYPE_GRAY; - get_token(pnm_file, width_token); - sscanf (width_token, "%lu", &ul_width); - width = (png_uint_32) ul_width; - get_token(pnm_file, height_token); - sscanf (height_token, "%lu", &ul_height); - height = (png_uint_32) ul_height; - get_token(pnm_file, maxval_token); - sscanf (maxval_token, "%lu", &ul_maxval); - maxval = (png_uint_32) ul_maxval; - - if (maxval <= 1) - bit_depth = 1; - else if (maxval <= 3) - bit_depth = 2; - else if (maxval <= 15) - bit_depth = 4; - else if (maxval <= 255) - bit_depth = 8; - else /* if (maxval <= 65535) */ - bit_depth = 16; - } - else if ((type_token[1] == '3') || (type_token[1] == '6')) - { - raw = (type_token[1] == '6'); - color_type = PNG_COLOR_TYPE_RGB; - get_token(pnm_file, width_token); - sscanf (width_token, "%lu", &ul_width); - width = (png_uint_32) ul_width; - get_token(pnm_file, height_token); - sscanf (height_token, "%lu", &ul_height); - height = (png_uint_32) ul_height; - get_token(pnm_file, maxval_token); - sscanf (maxval_token, "%lu", &ul_maxval); - maxval = (png_uint_32) ul_maxval; - if (maxval <= 1) - bit_depth = 1; - else if (maxval <= 3) - bit_depth = 2; - else if (maxval <= 15) - bit_depth = 4; - else if (maxval <= 255) - bit_depth = 8; - else /* if (maxval <= 65535) */ - bit_depth = 16; - } - else - { - return FALSE; - } - - /* read header of PGM file with alpha channel */ - - if (alpha) - { - if (color_type == PNG_COLOR_TYPE_GRAY) - color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - if (color_type == PNG_COLOR_TYPE_RGB) - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - - get_token(alpha_file, type_token); - if (type_token[0] != 'P') - { - return FALSE; - } - else if ((type_token[1] == '2') || (type_token[1] == '5')) - { - alpha_raw = (type_token[1] == '5'); - get_token(alpha_file, width_token); - sscanf (width_token, "%lu", &ul_alpha_width); - alpha_width=(png_uint_32) ul_alpha_width; - if (alpha_width != width) - return FALSE; - get_token(alpha_file, height_token); - sscanf (height_token, "%lu", &ul_alpha_height); - alpha_height = (png_uint_32) ul_alpha_height; - if (alpha_height != height) - return FALSE; - get_token(alpha_file, maxval_token); - sscanf (maxval_token, "%lu", &ul_maxval); - maxval = (png_uint_32) ul_maxval; - if (maxval <= 1) - alpha_depth = 1; - else if (maxval <= 3) - alpha_depth = 2; - else if (maxval <= 15) - alpha_depth = 4; - else if (maxval <= 255) - alpha_depth = 8; - else /* if (maxval <= 65535) */ - alpha_depth = 16; - if (alpha_depth != bit_depth) - return FALSE; - } - else - { - return FALSE; - } - } /* end if alpha */ - - /* calculate the number of channels and store alpha-presence */ - if (color_type == PNG_COLOR_TYPE_GRAY) - channels = 1; - else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - channels = 2; - else if (color_type == PNG_COLOR_TYPE_RGB) - channels = 3; - else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - channels = 4; - else - channels = 0; /* should not happen */ - - alpha_present = (channels - 1) % 2; - -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - if (packed_bitmap) - /* row data is as many bytes as can fit width x channels x bit_depth */ - row_bytes = (width * channels * bit_depth + 7) / 8; - else -#endif - /* row_bytes is the width x number of channels x (bit-depth / 8) */ - row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2); - - if ((png_pixels = (png_byte *) - malloc (row_bytes * height * sizeof (png_byte))) == NULL) - return FALSE; - - /* read data from PNM file */ - pix_ptr = png_pixels; - - for (row = 0; row < (int) height; row++) - { -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - if (packed_bitmap) { - for (i = 0; i < (int) row_bytes; i++) - /* png supports this format natively so no conversion is needed */ - *pix_ptr++ = get_data (pnm_file, 8); - } else -#endif - { - for (col = 0; col < (int) width; col++) - { - for (i = 0; i < (channels - alpha_present); i++) - { - if (raw) - *pix_ptr++ = get_data (pnm_file, bit_depth); - else - if (bit_depth <= 8) - *pix_ptr++ = get_value (pnm_file, bit_depth); - else - { - tmp16 = get_value (pnm_file, bit_depth); - *pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF); - pix_ptr++; - *pix_ptr = (png_byte) (tmp16 & 0xFF); - pix_ptr++; - } - } - - if (alpha) /* read alpha-channel from pgm file */ - { - if (alpha_raw) - *pix_ptr++ = get_data (alpha_file, alpha_depth); - else - if (alpha_depth <= 8) - *pix_ptr++ = get_value (alpha_file, bit_depth); - else - { - tmp16 = get_value (alpha_file, bit_depth); - *pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF); - *pix_ptr++ = (png_byte) (tmp16 & 0xFF); - } - } /* if alpha */ - } /* if packed_bitmap */ - } /* end for col */ - } /* end for row */ - - /* prepare the standard PNG structures */ - png_ptr = png_create_write_struct (png_get_libpng_ver(NULL), NULL, NULL, - NULL); - if (!png_ptr) - { - return FALSE; - } - info_ptr = png_create_info_struct (png_ptr); - if (!info_ptr) - { - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - return FALSE; - } - -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - if (packed_bitmap == TRUE) - { - png_set_packing (png_ptr); - png_set_invert_mono (png_ptr); - } -#endif - - /* setjmp() must be called in every function that calls a PNG-reading libpng function */ - if (setjmp (png_jmpbuf(png_ptr))) - { - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - return FALSE; - } - - /* initialize the png structure */ - png_init_io (png_ptr, png_file); - - /* we're going to write more or less the same PNG as the input file */ - png_set_IHDR (png_ptr, info_ptr, width, height, bit_depth, color_type, - (!interlace) ? PNG_INTERLACE_NONE : PNG_INTERLACE_ADAM7, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - /* write the file header information */ - png_write_info (png_ptr, info_ptr); - - /* if needed we will allocate memory for an new array of row-pointers */ - if (row_pointers == (unsigned char**) NULL) - { - if ((row_pointers = (png_byte **) - malloc (height * sizeof (png_bytep))) == NULL) - { - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - return FALSE; - } - } - - /* set the individual row_pointers to point at the correct offsets */ - for (i = 0; i < (int) height; i++) - row_pointers[i] = png_pixels + i * row_bytes; - - /* write out the entire image data in one call */ - png_write_image (png_ptr, row_pointers); - - /* write the additional chunks to the PNG file (not really needed) */ - png_write_end (png_ptr, info_ptr); - - /* clean up after the write, and free any memory allocated */ - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - - if (row_pointers != (unsigned char**) NULL) - free (row_pointers); - if (png_pixels != (unsigned char*) NULL) - free (png_pixels); - - return TRUE; -} /* end of pnm2png */ - -/* - * get_token() - gets the first string after whitespace - */ - -void get_token(FILE *pnm_file, char *token) -{ - int i = 0; - int ret; - - /* remove white-space and comment lines */ - do - { - ret = fgetc(pnm_file); - if (ret == '#') { - /* the rest of this line is a comment */ - do - { - ret = fgetc(pnm_file); - } - while ((ret != '\n') && (ret != '\r') && (ret != EOF)); - } - if (ret == EOF) break; - token[i] = (unsigned char) ret; - } - while ((token[i] == '\n') || (token[i] == '\r') || (token[i] == ' ')); - - /* read string */ - do - { - ret = fgetc(pnm_file); - if (ret == EOF) break; - i++; - token[i] = (unsigned char) ret; - } - while ((token[i] != '\n') && (token[i] != '\r') && (token[i] != ' ')); - - token[i] = '\0'; - - return; -} - -/* - * get_data() - takes first byte and converts into next pixel value, - * taking as much bits as defined by bit-depth and - * using the bit-depth to fill up a byte (0Ah -> AAh) - */ - -png_uint_32 get_data (FILE *pnm_file, int depth) -{ - static int bits_left = 0; - static int old_value = 0; - static int mask = 0; - int i; - png_uint_32 ret_value; - - if (mask == 0) - for (i = 0; i < depth; i++) - mask = (mask >> 1) | 0x80; - - if (bits_left <= 0) - { - old_value = fgetc (pnm_file); - bits_left = 8; - } - - ret_value = old_value & mask; - for (i = 1; i < (8 / depth); i++) - ret_value = ret_value || (ret_value >> depth); - - old_value = (old_value << depth) & 0xFF; - bits_left -= depth; - - return ret_value; -} - -/* - * get_value() - takes first (numeric) string and converts into number, - * using the bit-depth to fill up a byte (0Ah -> AAh) - */ - -png_uint_32 get_value (FILE *pnm_file, int depth) -{ - static png_uint_32 mask = 0; - png_byte token[16]; - unsigned long ul_ret_value; - png_uint_32 ret_value; - int i = 0; - - if (mask == 0) - for (i = 0; i < depth; i++) - mask = (mask << 1) | 0x01; - - get_token (pnm_file, (char *) token); - sscanf ((const char *) token, "%lu", &ul_ret_value); - ret_value = (png_uint_32) ul_ret_value; - - ret_value &= mask; - - if (depth < 8) - for (i = 0; i < (8 / depth); i++) - ret_value = (ret_value << depth) || ret_value; - - return ret_value; -} - -/* end of source */ - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.sh b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.sh deleted file mode 100644 index d79df2fae08..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngminus/pnm2png.sh +++ /dev/null @@ -1,42 +0,0 @@ -#!/bin/sh -# -- grayscale -./pnm2png basn0g01.pgm basn0g01.png -./pnm2png basn0g02.pgm basn0g02.png -./pnm2png basn0g04.pgm basn0g04.png -./pnm2png basn0g08.pgm basn0g08.png -./pnm2png basn0g16.pgm basn0g16.png -# -- full-color -./pnm2png basn2c08.ppm basn2c08.png -./pnm2png basn2c16.ppm basn2c16.png -# -- palletted -./pnm2png basn3p01.ppm basn3p01.png -./pnm2png basn3p02.ppm basn3p02.png -./pnm2png basn3p04.ppm basn3p04.png -./pnm2png basn3p08.ppm basn3p08.png -# -- gray with alpha-channel -./pnm2png -alpha basn6a08.pgm basn4a08.pgm basn4a08.png -./pnm2png -alpha basn6a16.pgm basn4a16.pgm basn4a16.png -# -- color with alpha-channel -./pnm2png -alpha basn6a08.pgm basn6a08.ppm basn6a08.png -./pnm2png -alpha basn6a16.pgm basn6a16.ppm basn6a16.png -# -- grayscale -./pnm2png rawn0g01.pgm rawn0g01.png -./pnm2png rawn0g02.pgm rawn0g02.png -./pnm2png rawn0g04.pgm rawn0g04.png -./pnm2png rawn0g08.pgm rawn0g08.png -./pnm2png rawn0g16.pgm rawn0g16.png -# -- full-color -./pnm2png rawn2c08.ppm rawn2c08.png -./pnm2png rawn2c16.ppm rawn2c16.png -# -- palletted -./pnm2png rawn3p01.ppm rawn3p01.png -./pnm2png rawn3p02.ppm rawn3p02.png -./pnm2png rawn3p04.ppm rawn3p04.png -./pnm2png rawn3p08.ppm rawn3p08.png -# -- gray with alpha-channel -./pnm2png -alpha rawn6a08.pgm rawn4a08.pgm rawn4a08.png -./pnm2png -alpha rawn6a16.pgm rawn4a16.pgm rawn4a16.png -# -- color with alpha-channel -./pnm2png -alpha rawn6a08.pgm rawn6a08.ppm rawn6a08.png -./pnm2png -alpha rawn6a16.pgm rawn6a16.ppm rawn6a16.png - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngsuite/README b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngsuite/README deleted file mode 100644 index ec4af9473f1..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngsuite/README +++ /dev/null @@ -1,105 +0,0 @@ - -pngsuite --------- -(c) Willem van Schaik, 1999, 2011, 2012 -Two images are by Glenn Randers-Pehrson, 2012 - -Permission to use, copy, modify, and distribute these images for any -purpose and without fee is hereby granted. - -The 15 "bas*.png" images are part of the much larger PngSuite test-set of -images, available for developers of PNG supporting software. The -complete set, available at http:/www.schaik.com/pngsuite/, contains -a variety of images to test interlacing, gamma settings, ancillary -chunks, etc. - -The "ft*.png" images are "free/libre" replacements for the transparent -corresponding t*.png images in the PngSuite. - -The images in this directory represent the basic PNG color-types: -grayscale (1-16 bit deep), full color (8 or 16 bit), paletted -(1-8 bit) and grayscale or color images with alpha channel. You -can use them to test the proper functioning of PNG software. - - filename depth type - ------------ ------ -------------- - basn0g01.png 1-bit grayscale - basn0g02.png 2-bit grayscale - basn0g04.png 4-bit grayscale - basn0g08.png 8-bit grayscale - basn0g16.png 16-bit grayscale - basn2c08.png 8-bit truecolor - basn2c16.png 16-bit truecolor - basn3p01.png 1-bit paletted - basn3p02.png 2-bit paletted - basn3p04.png 4-bit paletted - basn3p08.png 8-bit paletted - basn4a08.png 8-bit gray with alpha - basn4a16.png 16-bit gray with alpha - basn6a08.png 8-bit RGBA - basn6a16.png 16-bit RGBA - - ftbbn0g01.png 1-bit grayscale, black bKGD - ftbbn0g02.png 2-bit grayscale, black bKGD - ftbbn0g04.png 4-bit grayscale, black bKGD - ftbbn2c16.png 16-bit truecolor, black bKGD - ftbbn3p08.png 8-bit paletted, black bKGD - ftbgn2c16.png 16-bit truecolor, gray bKGD - ftbgn3p08.png 8-bit paletted, gray bKGD - ftbrn2c08.png 8-bit truecolor, red bKGD - ftbwn0g16.png 16-bit gray, white bKGD - ftbwn3p08.png 8-bit paletted, white bKGD - ftbyn3p08.png 8-bit paletted, yellow bKGD - ftp0n0g08.png 8-bit grayscale, opaque - ftp0n2c08.png 8-bit truecolor, opaque - ftp0n3p08.png 8-bit paletted, opaque - ftp1n3p08.png 8-bit paletted, no bKGD - -Here is the correct result of typing "pngtest -m bas*.png" in -this directory: - -Testing basn0g01.png: PASS (524 zero samples) - Filter 0 was used 32 times -Testing basn0g02.png: PASS (448 zero samples) - Filter 0 was used 32 times -Testing basn0g04.png: PASS (520 zero samples) - Filter 0 was used 32 times -Testing basn0g08.png: PASS (3 zero samples) - Filter 1 was used 9 times - Filter 4 was used 23 times -Testing basn0g16.png: PASS (1 zero samples) - Filter 1 was used 1 times - Filter 2 was used 31 times -Testing basn2c08.png: PASS (6 zero samples) - Filter 1 was used 5 times - Filter 4 was used 27 times -Testing basn2c16.png: PASS (592 zero samples) - Filter 1 was used 1 times - Filter 4 was used 31 times -Testing basn3p01.png: PASS (512 zero samples) - Filter 0 was used 32 times -Testing basn3p02.png: PASS (448 zero samples) - Filter 0 was used 32 times -Testing basn3p04.png: PASS (544 zero samples) - Filter 0 was used 32 times -Testing basn3p08.png: PASS (4 zero samples) - Filter 0 was used 32 times -Testing basn4a08.png: PASS (32 zero samples) - Filter 1 was used 1 times - Filter 4 was used 31 times -Testing basn4a16.png: PASS (64 zero samples) - Filter 0 was used 1 times - Filter 1 was used 2 times - Filter 2 was used 1 times - Filter 4 was used 28 times -Testing basn6a08.png: PASS (160 zero samples) - Filter 1 was used 1 times - Filter 4 was used 31 times -Testing basn6a16.png: PASS (1072 zero samples) - Filter 1 was used 4 times - Filter 4 was used 28 times -libpng passes test - -Willem van Schaik -<willem@schaik.com> -October 1999 diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/pngsuite/basn0g01.png b/Build/source/libs/libpng/libpng-1.6.16/contrib/pngsuite/basn0g01.png Binary files differdeleted file mode 100644 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/dev/null @@ -1,26 +0,0 @@ -This directory (contrib/tools) contains tools used by the authors of libpng. - -Code and data placed in this directory is not required to build libpng, -however the code in this directory has been used to generate data or code in -the body of the libpng source. The source code identifies where this has -been done. Code in this directory may not compile on all operating systems -that libpng supports. - -NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY. - -To the extent possible under law, the authors have waived all copyright and -related or neighboring rights to this work. This work is published from: -United States. - -The files may be used freely in any way. - -The source code and comments in this directory are the original work of the -people named below. No other person or organization has made contributions to -the work in this directory. - -ORIGINAL AUTHORS - The following people have contributed to the code in this directory. None - of the people below claim any rights with regard to the contents of this - directory. - - John Bowler <jbowler@acm.org> diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/checksum-icc.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/checksum-icc.c deleted file mode 100644 index 581e7088a62..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/checksum-icc.c +++ /dev/null @@ -1,102 +0,0 @@ -/* checksum-icc.c - * - * Copyright (c) 2013 John Cunningham Bowler - * - * Last changed in libpng 1.6.0 [February 14, 2013] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Generate crc32 and adler32 checksums of the given input files, used to - * generate check-codes for use when matching ICC profiles within libpng. - */ -#include <stdio.h> - -#include <zlib.h> - -static int -read_one_file(FILE *ip, const char *name) -{ - uLong length = 0; - uLong a32 = adler32(0, NULL, 0); - uLong c32 = crc32(0, NULL, 0); - Byte header[132]; - - for (;;) - { - int ch = getc(ip); - Byte b; - - if (ch == EOF) break; - - b = (Byte)ch; - - if (length < sizeof header) - header[length] = b; - - ++length; - a32 = adler32(a32, &b, 1); - c32 = crc32(c32, &b, 1); - } - - if (ferror(ip)) - return 0; - - /* Success */ - printf("PNG_ICC_CHECKSUM(0x%8.8lx, 0x%8.8lx,\n PNG_MD5(" - "0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x," - " 0x%2.2x%2.2x%2.2x%2.2x), %d,\n" - " \"%4.4d/%2.2d/%2.2d %2.2d:%2.2d:%2.2d\", %lu, \"%s\")\n", - (unsigned long)a32, (unsigned long)c32, - header[84], header[85], header[86], header[87], - header[88], header[89], header[90], header[91], - header[92], header[93], header[94], header[95], - header[96], header[97], header[98], header[99], -# define u16(x) (header[x] * 256 + header[x+1]) -# define u32(x) (u16(x) * 65536 + u16(x+2)) - u32(64), u16(24), u16(26), u16(28), u16(30), u16(32), u16(34), - (unsigned long)length, name); - - return 1; -} - -int main(int argc, char **argv) -{ - int err = 0; - - printf("/* adler32, crc32, MD5[16], intent, date, length, file-name */\n"); - - if (argc > 1) - { - int i; - - for (i=1; i<argc; ++i) - { - FILE *ip = fopen(argv[i], "rb"); - - if (ip == NULL || !read_one_file(ip, argv[i])) - { - err = 1; - perror(argv[i]); - fprintf(stderr, "%s: read error\n", argv[i]); - printf("/* ERROR: %s */\n", argv[i]); - } - - (void)fclose(ip); - } - } - - else - { - if (!read_one_file(stdin, "-")) - { - err = 1; - perror("stdin"); - fprintf(stderr, "stdin: read error\n"); - printf("/* ERROR: stdin */\n"); - } - } - - return err; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/chkfmt b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/chkfmt deleted file mode 100755 index 9da6475fd4e..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/chkfmt +++ /dev/null @@ -1,137 +0,0 @@ -#!/bin/sh -# -# Check the format of the source files in the current directory - checks for a -# line length of 80 characters max and no tab characters. -# -# Optionally arguments are files or directories to check. -# -# -v: output the long lines (makes fixing them easier) -# -e: spawn an editor for each file that needs a change ($EDITOR must be -# defined). When using -e the script MUST be run from an interactive -# command line. -verbose= -edit= -vers= -test "$1" = "-v" && { - shift - verbose=yes -} -test "$1" = "-e" && { - shift - if test -n "$EDITOR" - then - edit=yes - - # Copy the standard streams for the editor - exec 3>&0 4>&1 5>&2 - else - echo "chkfmt -e: EDITOR must be defined" >&2 - exit 1 - fi -} - -# Function to edit a single file - if the file isn't changed ask the user -# whether or not to continue. This stuff only works if the script is run from -# the command line (otherwise, don't specify -e or you will be sorry). -doed(){ - cp "$file" "$file".orig - "$EDITOR" "$file" 0>&3 1>&4 2>&5 3>&- 4>&- 5>&- || exit 1 - if cmp -s "$file".orig "$file" - then - rm "$file".orig - echo -n "$file: file not changed, type anything to continue: " >&5 - read ans 0>&3 - test -n "$ans" || return 1 - fi - return 0 -} - -# In beta versions the version string which appears in files can be a little -# long and cause spuriously overlong lines. To avoid this subtitute the version -# string with a 'standard' version a.b.cc before checking for long lines. -if test -r png.h -then - vers="`sed -n -e \ - 's/^#define PNG_LIBPNG_VER_STRING .\([0-9]\.[0-9]\.[0-9][0-9a-z]*\).$/\1/p' \ - png.h`" - echo "chkfmt: checking version $vers" -fi -if test -z "$vers" -then - echo "chkfmt: png.h not found, ignoring version number" >&2 -fi - -test -n "$1" || set -- . -find "$@" \( -type d \( -name '.git' -o -name '.libs' -o -name 'projects' \) \ - -prune \) -o \( -type f \ - ! -name '*.[oa]' ! -name '*.l[oa]' ! -name '*.png' ! -name '*.out' \ - ! -name '*.jpg' ! -name '*.patch' ! -name '*.obj' ! -name '*.exe' \ - ! -name '*.com' ! -name '*.tar.*' ! -name '*.zip' ! -name '*.ico' \ - ! -name '*.res' ! -name '*.rc' ! -name '*.mms' ! -name '*.rej' \ - ! -name '*.dsp' ! -name '*.orig' ! -name '*.dfn' ! -name '*.swp' \ - ! -name '~*' ! -name '*.3' \ - ! -name 'missing' ! -name 'mkinstalldirs' ! -name 'depcomp' \ - ! -name 'aclocal.m4' ! -name 'install-sh' ! -name 'Makefile.in' \ - ! -name 'ltmain.sh' ! -name 'config*' -print \) | { - st=0 - while read file - do - case "$file" in - *.mak|*[Mm]akefile.*|*[Mm]akefile) - # Makefiles require tabs, dependency lines can be this long. - check_tabs= - line_length=100;; - *.awk) - # Includes literal tabs - check_tabs= - # The following is arbitrary - line_length=132;; - *contrib/*/*.[ch]) - check_tabs=yes - line_length=96;; - *) - check_tabs=yes - line_length=80;; - esac - - # Note that vers can only contain 0-9, . and a-z - if test -n "$vers" - then - sed -e "s/$vers/a.b.cc/g" "$file" >"$file".$$ - else - cp "$file" "$file".$$ - fi - splt="`fold -$line_length "$file".$$ | diff -c "$file".$$ -`" - rm "$file".$$ - - if test -n "$splt" - then - echo "$file: lines too long" - st=1 - if test -n "$EDITOR" -a -n "$edit" - then - doed "$file" || exit 1 - elif test -n "$verbose" - then - echo "$splt" - fi - fi - if test -n "$check_tabs" - then - tab="`tr -c -d '\t' <"$file"`" - if test -n "$tab" - then - echo "$file: file contains tab characters" - st=1 - if test -n "$EDITOR" -a -n "$edit" - then - doed "$file" || exit 1 - elif test -n "$verbose" - then - echo "$splt" - fi - fi - fi - done - exit $st -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/cvtcolor.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/cvtcolor.c deleted file mode 100644 index e6793c7d596..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/cvtcolor.c +++ /dev/null @@ -1,188 +0,0 @@ -/*- - * convert.c - * - * Last changed in libpng 1.6.0 [February 14, 2013] - * - * COPYRIGHT: Written by John Cunningham Bowler, 2013. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Convert 8-bit sRGB or 16-bit linear values to another format. - */ -#define _ISOC99_SOURCE 1 - -#include <stdlib.h> -#include <string.h> -#include <math.h> -#include <stdio.h> - -#include <fenv.h> - -#include "sRGB.h" - -static void -usage(const char *prog) -{ - fprintf(stderr, - "%s: usage: %s [-linear|-sRGB] [-gray|-color] component{1,4}\n", - prog, prog); - exit(1); -} - -unsigned long -component(const char *prog, const char *arg, int issRGB) -{ - char *ep; - unsigned long c = strtoul(arg, &ep, 0); - - if (ep <= arg || *ep || c > 65535 || (issRGB && c > 255)) - { - fprintf(stderr, "%s: %s: invalid component value (%lu)\n", prog, arg, c); - usage(prog); - } - - return c; -} - -int -main(int argc, const char **argv) -{ - const char *prog = *argv++; - int to_linear = 0, to_gray = 0, to_color = 0; - int channels = 0; - double c[4]; - - /* FE_TONEAREST is the IEEE754 round to nearest, preferring even, mode; i.e. - * everything rounds to the nearest value except that '.5' rounds to the - * nearest even value. - */ - fesetround(FE_TONEAREST); - - c[3] = c[2] = c[1] = c[0] = 0; - - while (--argc > 0 && **argv == '-') - { - const char *arg = 1+*argv++; - - if (strcmp(arg, "sRGB") == 0) - to_linear = 0; - - else if (strcmp(arg, "linear") == 0) - to_linear = 1; - - else if (strcmp(arg, "gray") == 0) - to_gray = 1, to_color = 0; - - else if (strcmp(arg, "color") == 0) - to_gray = 0, to_color = 1; - - else - usage(prog); - } - - switch (argc) - { - default: - usage(prog); - break; - - case 4: - c[3] = component(prog, argv[3], to_linear); - ++channels; - case 3: - c[2] = component(prog, argv[2], to_linear); - ++channels; - case 2: - c[1] = component(prog, argv[1], to_linear); - ++channels; - case 1: - c[0] = component(prog, argv[0], to_linear); - ++channels; - break; - } - - if (to_linear) - { - int i; - int components = channels; - - if ((components & 1) == 0) - --components; - - for (i=0; i<components; ++i) c[i] = linear_from_sRGB(c[i] / 255); - if (components < channels) - c[components] = c[components] / 255; - } - - else - { - int i; - for (i=0; i<4; ++i) c[i] /= 65535; - - if ((channels & 1) == 0) - { - double alpha = c[channels-1]; - - if (alpha > 0) - for (i=0; i<channels-1; ++i) c[i] /= alpha; - else - for (i=0; i<channels-1; ++i) c[i] = 1; - } - } - - if (to_gray) - { - if (channels < 3) - { - fprintf(stderr, "%s: too few channels (%d) for -gray\n", - prog, channels); - usage(prog); - } - - c[0] = YfromRGB(c[0], c[1], c[2]); - channels -= 2; - } - - if (to_color) - { - if (channels > 2) - { - fprintf(stderr, "%s: too many channels (%d) for -color\n", - prog, channels); - usage(prog); - } - - c[3] = c[1]; /* alpha, if present */ - c[2] = c[1] = c[0]; - } - - if (to_linear) - { - int i; - if ((channels & 1) == 0) - { - double alpha = c[channels-1]; - for (i=0; i<channels-1; ++i) c[i] *= alpha; - } - - for (i=0; i<channels; ++i) c[i] = nearbyint(c[i] * 65535); - } - - else /* to sRGB */ - { - int i = (channels+1)&~1; - while (--i >= 0) - c[i] = sRGB_from_linear(c[i]); - - for (i=0; i<channels; ++i) c[i] = nearbyint(c[i] * 255); - } - - { - int i; - for (i=0; i<channels; ++i) printf(" %g", c[i]); - } - printf("\n"); - - return 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/intgamma.sh b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/intgamma.sh deleted file mode 100644 index 41c5d6dd278..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/intgamma.sh +++ /dev/null @@ -1,110 +0,0 @@ -#!/bin/sh -# -# intgamma.sh -# -# Last changed in libpng 1.6.0 [February 14, 2013] -# -# COPYRIGHT: Written by John Cunningham Bowler, 2013. -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Shell script to generate png.c 8-bit and 16-bit log tables (see the code in -# png.c for details). -# -# This script uses the "bc" arbitrary precision calculator to calculate 32-bit -# fixed point values of logarithms appropriate to finding the log of an 8-bit -# (0..255) value and a similar table for the exponent calculation. -# -# "bc" must be on the path when the script is executed, and the math library -# (-lm) must be available -# -# function to print out a list of numbers as integers; the function truncates -# the integers which must be one-per-line -function print(){ - awk 'BEGIN{ - str = "" - } - { - sub("\\.[0-9]*$", "") - if ($0 == "") - $0 = "0" - - if (str == "") - t = " " $0 "U" - else - t = str ", " $0 "U" - - if (length(t) >= 80) { - print str "," - str = " " $0 "U" - } else - str = t - } - END{ - print str - }' -} -# -# The logarithm table. -cat <<END -/* 8-bit log table: png_8bit_l2[128] - * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to - * 255, so it's the base 2 logarithm of a normalized 8-bit floating point - * mantissa. The numbers are 32-bit fractions. - */ -static const png_uint_32 -png_8bit_l2[128] = -{ -END -# -bc -lqws <<END | print -f=65536*65536/l(2) -for (i=128;i<256;++i) { .5 - l(i/255)*f; } -END -echo '};' -echo -# -# The exponent table. -cat <<END -/* The 'exp()' case must invert the above, taking a 20-bit fixed point - * logarithmic value and returning a 16 or 8-bit number as appropriate. In - * each case only the low 16 bits are relevant - the fraction - since the - * integer bits (the top 4) simply determine a shift. - * - * The worst case is the 16-bit distinction between 65535 and 65534; this - * requires perhaps spurious accuracy in the decoding of the logarithm to - * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance - * of getting this accuracy in practice. - * - * To deal with this the following exp() function works out the exponent of the - * frational part of the logarithm by using an accurate 32-bit value from the - * top four fractional bits then multiplying in the remaining bits. - */ -static const png_uint_32 -png_32bit_exp[16] = -{ -END -# -bc -lqws <<END | print -f=l(2)/16 -for (i=0;i<16;++i) { - x = .5 + e(-i*f)*2^32; - if (x >= 2^32) x = 2^32-1; - x; -} -END -echo '};' -echo -# -# And the table of adjustment values. -cat <<END -/* Adjustment table; provided to explain the numbers in the code below. */ -#if 0 -END -bc -lqws <<END | awk '{ printf "%5d %s\n", 12-NR, $0 }' -for (i=11;i>=0;--i){ - (1 - e(-(2^i)/65536*l(2))) * 2^(32-i) -} -END -echo '#endif' diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/makesRGB.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/makesRGB.c deleted file mode 100644 index e66c9f1576b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/makesRGB.c +++ /dev/null @@ -1,430 +0,0 @@ -/* makesRGB.c -- build sRGB-to-linear and linear-to-sRGB conversion tables - * - * Last changed in libpng 1.6.0 [February 14, 2013] - * - * COPYRIGHT: Written by John Cunningham Bowler, 2013. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Make a table to convert 8-bit sRGB encoding values into the closest 16-bit - * linear value. - * - * Make two tables to take a linear value scaled to 255*65535 and return an - * approximation to the 8-bit sRGB encoded value. Calculate the error in these - * tables and display it. - */ -#define _C99_SOURCE 1 -#include <stdio.h> -#include <math.h> -#include <stdlib.h> - -/* pngpriv.h includes the definition of 'PNG_sRGB_FROM_LINEAR' which is required - * to verify the actual code. - */ -#include "../../pngpriv.h" - -#include "sRGB.h" - -/* The tables are declared 'const' in pngpriv.h, so this redefines the tables to - * be used. - */ -#define png_sRGB_table sRGB_table -#define png_sRGB_base sRGB_base -#define png_sRGB_delta sRGB_delta - -static png_uint_16 png_sRGB_table[256]; -static png_uint_16 png_sRGB_base[512]; -static png_byte png_sRGB_delta[512]; - -static const unsigned int max_input = 255*65535; - -double -fsRGB(double l) -{ - return sRGB_from_linear(l/max_input); -} - -double -sRGB(unsigned int i) -{ - return fsRGB(i); -} - -double -finvsRGB(unsigned int i) -{ - return 65535 * linear_from_sRGB(i/255.); -} - -png_uint_16 -invsRGB(unsigned int i) -{ - unsigned int x = nearbyint(finvsRGB(i)); - - if (x > 65535) - { - fprintf(stderr, "invsRGB(%u) overflows to %u\n", i, x); - exit(1); - } - - return (png_uint_16)x; -} - -int -main(int argc, char **argv) -{ - unsigned int i, i16, ibase; - double min_error = 0; - double max_error = 0; - double min_error16 = 0; - double max_error16 = 0; - double adjust; - double adjust_lo = 0.4, adjust_hi = 0.6, adjust_mid = 0.5; - unsigned int ec_lo = 0, ec_hi = 0, ec_mid = 0; - unsigned int error_count = 0; - unsigned int error_count16 = 0; - int test_only = 0; - - if (argc > 1) - test_only = strcmp("--test", argv[1]) == 0; - - /* Initialize the encoding table first. */ - for (i=0; i<256; ++i) - { - png_sRGB_table[i] = invsRGB(i); - } - - /* Now work out the decoding tables (this is where the error comes in because - * there are 512 set points and 512 straight lines between them.) - */ - for (;;) - { - if (ec_lo == 0) - adjust = adjust_lo; - - else if (ec_hi == 0) - adjust = adjust_hi; - - else if (ec_mid == 0) - adjust = adjust_mid; - - else if (ec_mid < ec_hi) - adjust = (adjust_mid + adjust_hi)/2; - - else if (ec_mid < ec_lo) - adjust = (adjust_mid + adjust_lo)/2; - - else - { - fprintf(stderr, "not reached: %u .. %u .. %u\n", ec_lo, ec_mid, ec_hi); - exit(1); - } - - /* Calculate the table using the current 'adjust' */ - for (i=0; i<=511; ++i) - { - double lo = 255 * sRGB(i << 15); - double hi = 255 * sRGB((i+1) << 15); - unsigned int calc; - - calc = nearbyint((lo+adjust) * 256); - if (calc > 65535) - { - fprintf(stderr, "table[%d][0]: overflow %08x (%d)\n", i, calc, - calc); - exit(1); - } - png_sRGB_base[i] = calc; - - calc = nearbyint((hi-lo) * 32); - if (calc > 255) - { - fprintf(stderr, "table[%d][1]: overflow %08x (%d)\n", i, calc, - calc); - exit(1); - } - png_sRGB_delta[i] = calc; - } - - /* Check the 16-bit linear values alone: */ - error_count16 = 0; - for (i16=0; i16 <= 65535; ++i16) - { - unsigned int i = 255*i16; - unsigned int iexact = nearbyint(255*sRGB(i)); - unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); - - if (icalc != iexact) - ++error_count16; - } - - /* Now try changing the adjustment. */ - if (ec_lo == 0) - ec_lo = error_count16; - - else if (ec_hi == 0) - ec_hi = error_count16; - - else if (ec_mid == 0) - { - ec_mid = error_count16; - printf("/* initial error counts: %u .. %u .. %u */\n", ec_lo, ec_mid, - ec_hi); - } - - else if (error_count16 < ec_mid) - { - printf("/* adjust (mid ): %f: %u -> %u */\n", adjust, ec_mid, - error_count16); - ec_mid = error_count16; - adjust_mid = adjust; - } - - else if (adjust < adjust_mid && error_count16 < ec_lo) - { - printf("/* adjust (low ): %f: %u -> %u */\n", adjust, ec_lo, - error_count16); - ec_lo = error_count16; - adjust_lo = adjust; - } - - else if (adjust > adjust_mid && error_count16 < ec_hi) - { - printf("/* adjust (high): %f: %u -> %u */\n", adjust, ec_hi, - error_count16); - ec_hi = error_count16; - adjust_hi = adjust; - } - - else - { - adjust = adjust_mid; - printf("/* adjust: %f: %u */\n", adjust, ec_mid); - break; - } - } - - /* For each entry in the table try to adjust it to minimize the error count - * in that entry. Each entry corresponds to 128 input values. - */ - for (ibase=0; ibase<65536; ibase+=128) - { - png_uint_16 base = png_sRGB_base[ibase >> 7], trybase = base, ob=base; - png_byte delta = png_sRGB_delta[ibase >> 7], trydelta = delta, od=delta; - unsigned int ecbase = 0, eco; - - for (;;) - { - png_sRGB_base[ibase >> 7] = trybase; - png_sRGB_delta[ibase >> 7] = trydelta; - - /* Check the 16-bit linear values alone: */ - error_count16 = 0; - for (i16=ibase; i16 < ibase+128; ++i16) - { - unsigned int i = 255*i16; - unsigned int iexact = nearbyint(255*sRGB(i)); - unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); - - if (icalc != iexact) - ++error_count16; - } - - if (error_count16 == 0) - break; - - if (ecbase == 0) - { - eco = ecbase = error_count16; - ++trybase; /* First test */ - } - - else if (error_count16 < ecbase) - { - if (trybase > base) - { - base = trybase; - ++trybase; - } - else if (trybase < base) - { - base = trybase; - --trybase; - } - else if (trydelta > delta) - { - delta = trydelta; - ++trydelta; - } - else if (trydelta < delta) - { - delta = trydelta; - --trydelta; - } - else - { - fprintf(stderr, "makesRGB: impossible\n"); - exit(1); - } - ecbase = error_count16; - } - - else - { - if (trybase > base) - trybase = base-1; - else if (trybase < base) - { - trybase = base; - ++trydelta; - } - else if (trydelta > delta) - trydelta = delta-1; - else if (trydelta < delta) - break; /* end of tests */ - } - } - - png_sRGB_base[ibase >> 7] = base; - png_sRGB_delta[ibase >> 7] = delta; - if (base != ob || delta != od) - { - printf("/* table[%u]={%u,%u} -> {%u,%u} %u -> %u errors */\n", - ibase>>7, ob, od, base, delta, eco, ecbase); - } - else if (0) - printf("/* table[%u]={%u,%u} %u errors */\n", ibase>>7, ob, od, - ecbase); - } - - /* Only do the full (slow) test at the end: */ - min_error = -.4999; - max_error = .4999; - error_count = 0; - - for (i=0; i <= max_input; ++i) - { - unsigned int iexact = nearbyint(255*sRGB(i)); - unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); - - if (icalc != iexact) - { - double err = 255*sRGB(i) - icalc; - - if (err > (max_error+.001) || err < (min_error-.001)) - { - printf( - "/* 0x%08x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n", - i, iexact, icalc, png_sRGB_base[i>>15], - png_sRGB_delta[i>>15], err); - } - - ++error_count; - if (err > max_error) - max_error = err; - else if (err < min_error) - min_error = err; - } - } - - /* Re-check the 16-bit cases too, including the warning if there is an error - * bigger than 1. - */ - error_count16 = 0; - max_error16 = 0; - min_error16 = 0; - for (i16=0; i16 <= 65535; ++i16) - { - unsigned int i = 255*i16; - unsigned int iexact = nearbyint(255*sRGB(i)); - unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); - - if (icalc != iexact) - { - double err = 255*sRGB(i) - icalc; - - ++error_count16; - if (err > max_error16) - max_error16 = err; - else if (err < min_error16) - min_error16 = err; - - if (abs(icalc - iexact) > 1) - printf( - "/* 0x%04x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n", - i16, iexact, icalc, png_sRGB_base[i>>15], - png_sRGB_delta[i>>15], err); - } - } - - /* Check the round trip for each 8-bit sRGB value. */ - for (i16=0; i16 <= 255; ++i16) - { - unsigned int i = 255 * png_sRGB_table[i16]; - unsigned int iexact = nearbyint(255*sRGB(i)); - unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); - - if (i16 != iexact) - { - fprintf(stderr, "8-bit rounding error: %d -> %d\n", i16, iexact); - exit(1); - } - - if (icalc != i16) - { - double finv = finvsRGB(i16); - - printf("/* 8-bit roundtrip error: %d -> %f -> %d(%f) */\n", - i16, finv, icalc, fsRGB(255*finv)); - } - } - - - printf("/* error: %g - %g, %u (%g%%) of readings inexact */\n", - min_error, max_error, error_count, (100.*error_count)/max_input); - printf("/* 16-bit error: %g - %g, %u (%g%%) of readings inexact */\n", - min_error16, max_error16, error_count16, (100.*error_count16)/65535); - - if (!test_only) - { - printf("PNG_CONST png_uint_16 png_sRGB_table[256] =\n{\n "); - for (i=0; i<255; ) - { - do - { - printf("%d,", png_sRGB_table[i++]); - } - while ((i & 0x7) != 0 && i<255); - if (i<255) printf("\n "); - } - printf("%d\n};\n\n", png_sRGB_table[i]); - - - printf("PNG_CONST png_uint_16 png_sRGB_base[512] =\n{\n "); - for (i=0; i<511; ) - { - do - { - printf("%d,", png_sRGB_base[i++]); - } - while ((i & 0x7) != 0 && i<511); - if (i<511) printf("\n "); - } - printf("%d\n};\n\n", png_sRGB_base[i]); - - printf("PNG_CONST png_byte png_sRGB_delta[512] =\n{\n "); - for (i=0; i<511; ) - { - do - { - printf("%d,", png_sRGB_delta[i++]); - } - while ((i & 0xf) != 0 && i<511); - if (i<511) printf("\n "); - } - printf("%d\n};\n\n", png_sRGB_delta[i]); - } - - return 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/png-fix-itxt.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/png-fix-itxt.c deleted file mode 100644 index 1210bd9c813..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/png-fix-itxt.c +++ /dev/null @@ -1,153 +0,0 @@ - -/* png-fix-itxt version 1.0.0 - * - * Copyright 2013 Glenn Randers-Pehrson - * Last changed in libpng 1.6.3 [July 18, 2013] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Usage: - * - * png-fix-itxt.exe < bad.png > good.png - * - * Fixes a PNG file written with libpng-1.6.0 or 1.6.1 that has one or more - * uncompressed iTXt chunks. Assumes that the actual length is greater - * than or equal to the value in the length byte, and that the CRC is - * correct for the actual length. This program hunts for the CRC and - * adjusts the length byte accordingly. It is not an error to process a - * PNG file that has no iTXt chunks or one that has valid iTXt chunks; - * such files will simply be copied. - * - * Requires zlib (for crc32 and Z_NULL); build with - * - * gcc -O -o png-fix-itxt png-fix-itxt.c -lz - * - * If you need to handle iTXt chunks larger than 500000 kbytes you must - * rebuild png-fix-itxt with a larger values of MAX_LENGTH (or a smaller value - * if you know you will never encounter such huge iTXt chunks). - */ - -#include <stdio.h> -#include <zlib.h> - -#define MAX_LENGTH 500000 - -#define GETBREAK ((unsigned char)(inchar=getchar())); if (inchar == EOF) break - -int -main(void) -{ - unsigned int i; - unsigned char buf[MAX_LENGTH]; - unsigned long crc; - unsigned char c; - int inchar; - -/* Skip 8-byte signature */ - for (i=8; i; i--) - { - c=GETBREAK; - putchar(c); - } - -if (inchar != EOF) -for (;;) - { - /* Read the length */ - unsigned long length; /* must be 32 bits! */ - c=GETBREAK; buf[0] = c; length = c; length <<= 8; - c=GETBREAK; buf[1] = c; length += c; length <<= 8; - c=GETBREAK; buf[2] = c; length += c; length <<= 8; - c=GETBREAK; buf[3] = c; length += c; - - /* Read the chunkname */ - c=GETBREAK; buf[4] = c; - c=GETBREAK; buf[5] = c; - c=GETBREAK; buf[6] = c; - c=GETBREAK; buf[7] = c; - - - /* The iTXt chunk type expressed as integers is (105, 84, 88, 116) */ - if (buf[4] == 105 && buf[5] == 84 && buf[6] == 88 && buf[7] == 116) - { - if (length >= MAX_LENGTH-12) - break; /* To do: handle this more gracefully */ - - /* Initialize the CRC */ - crc = crc32(0, Z_NULL, 0); - - /* Copy the data bytes */ - for (i=8; i < length + 12; i++) - { - c=GETBREAK; buf[i] = c; - } - - /* Calculate the CRC */ - crc = crc32(crc, buf+4, (uInt)length+4); - - for (;;) - { - /* Check the CRC */ - if (((crc >> 24) & 0xff) == buf[length+8] && - ((crc >> 16) & 0xff) == buf[length+9] && - ((crc >> 8) & 0xff) == buf[length+10] && - ((crc ) & 0xff) == buf[length+11]) - break; - - length++; - - if (length >= MAX_LENGTH-12) - break; - - c=GETBREAK; - buf[length+11]=c; - - /* Update the CRC */ - crc = crc32(crc, buf+7+length, 1); - } - - /* Update length bytes */ - buf[0] = (unsigned char)((length << 24) & 0xff); - buf[1] = (unsigned char)((length << 16) & 0xff); - buf[2] = (unsigned char)((length << 8) & 0xff); - buf[3] = (unsigned char)((length ) & 0xff); - - /* Write the fixed iTXt chunk (length, name, data, crc) */ - for (i=0; i<length+12; i++) - putchar(buf[i]); - } - - else - { - /* Copy bytes that were already read (length and chunk name) */ - for (i=0; i<8; i++) - putchar(buf[i]); - - /* Copy data bytes and CRC */ - for (i=8; i< length+12; i++) - { - c=GETBREAK; - putchar(c); - } - - if (inchar == EOF) - { - break; - } - - /* The IEND chunk type expressed as integers is (73, 69, 78, 68) */ - if (buf[4] == 73 && buf[5] == 69 && buf[6] == 78 && buf[7] == 68) - break; - } - - if (inchar == EOF) - break; - - if (buf[4] == 73 && buf[5] == 69 && buf[6] == 78 && buf[7] == 68) - break; - } - - return 0; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/pngfix.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/pngfix.c deleted file mode 100644 index 65422f600c2..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/pngfix.c +++ /dev/null @@ -1,4048 +0,0 @@ -/* pngfix.c - * - * Copyright (c) 2014 John Cunningham Bowler - * - * Last changed in libpng 1.6.14 [October 23, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Tool to check and fix the zlib inflate 'too far back' problem. - * See the usage message for more information. - */ -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <ctype.h> -#include <limits.h> -#include <errno.h> -#include <assert.h> - -#define implies(x,y) assert(!(x) || (y)) - -#ifdef __GNUC__ - /* This is used to fix the error: - * - * pngfix.c: - * In function 'zlib_advance': - * pngfix.c:181:13: error: assuming signed overflow does not - * occur when simplifying conditional to constant [-Werror=strict-overflow] - */ -# define FIX_GCC volatile -#else -# define FIX_GCC -#endif - -#define PROGRAM_NAME "pngfix" - -/* Define the following to use this program against your installed libpng, - * rather than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include <png.h> -#else -# include "../../png.h" -#endif - -#if PNG_LIBPNG_VER < 10603 /* 1.6.3 */ -# error "pngfix will not work with libpng prior to 1.6.3" -#endif - -#ifdef PNG_SETJMP_SUPPORTED -#include <setjmp.h> - -#if defined(PNG_READ_SUPPORTED) && defined(PNG_EASY_ACCESS_SUPPORTED) -/* zlib.h defines the structure z_stream, an instance of which is included - * in this structure and is required for decompressing the LZ compressed - * data in PNG files. - */ -#ifndef ZLIB_CONST - /* We must ensure that zlib uses 'const' in declarations. */ -# define ZLIB_CONST -#endif -#include <zlib.h> -#ifdef const - /* zlib.h sometimes #defines const to nothing, undo this. */ -# undef const -#endif - -/* zlib.h has mediocre z_const use before 1.2.6, this stuff is for compatibility - * with older builds. - */ -#if ZLIB_VERNUM < 0x1260 -# define PNGZ_MSG_CAST(s) png_constcast(char*,s) -# define PNGZ_INPUT_CAST(b) png_constcast(png_bytep,b) -#else -# define PNGZ_MSG_CAST(s) (s) -# define PNGZ_INPUT_CAST(b) (b) -#endif - -#ifndef PNG_MAXIMUM_INFLATE_WINDOW -# error "pngfix not supported in this libpng version" -#endif - -#if ZLIB_VERNUM >= 0x1240 - -/* Copied from pngpriv.h */ -#ifdef __cplusplus -# define png_voidcast(type, value) static_cast<type>(value) -# define png_constcast(type, value) const_cast<type>(value) -# define png_aligncast(type, value) \ - static_cast<type>(static_cast<void*>(value)) -# define png_aligncastconst(type, value) \ - static_cast<type>(static_cast<const void*>(value)) -#else -# define png_voidcast(type, value) (value) -# define png_constcast(type, value) ((type)(value)) -# define png_aligncast(type, value) ((void*)(value)) -# define png_aligncastconst(type, value) ((const void*)(value)) -#endif /* __cplusplus */ - -#if PNG_LIBPNG_VER < 10700 -/* Chunk tags (copied from pngpriv.h) */ -#define PNG_32b(b,s) ((png_uint_32)(b) << (s)) -#define PNG_U32(b1,b2,b3,b4) \ - (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0)) - -/* Constants for known chunk types. */ -#define png_IDAT PNG_U32( 73, 68, 65, 84) -#define png_IEND PNG_U32( 73, 69, 78, 68) -#define png_IHDR PNG_U32( 73, 72, 68, 82) -#define png_PLTE PNG_U32( 80, 76, 84, 69) -#define png_bKGD PNG_U32( 98, 75, 71, 68) -#define png_cHRM PNG_U32( 99, 72, 82, 77) -#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */ -#define png_gAMA PNG_U32(103, 65, 77, 65) -#define png_gIFg PNG_U32(103, 73, 70, 103) -#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */ -#define png_gIFx PNG_U32(103, 73, 70, 120) -#define png_hIST PNG_U32(104, 73, 83, 84) -#define png_iCCP PNG_U32(105, 67, 67, 80) -#define png_iTXt PNG_U32(105, 84, 88, 116) -#define png_oFFs PNG_U32(111, 70, 70, 115) -#define png_pCAL PNG_U32(112, 67, 65, 76) -#define png_pHYs PNG_U32(112, 72, 89, 115) -#define png_sBIT PNG_U32(115, 66, 73, 84) -#define png_sCAL PNG_U32(115, 67, 65, 76) -#define png_sPLT PNG_U32(115, 80, 76, 84) -#define png_sRGB PNG_U32(115, 82, 71, 66) -#define png_sTER PNG_U32(115, 84, 69, 82) -#define png_tEXt PNG_U32(116, 69, 88, 116) -#define png_tIME PNG_U32(116, 73, 77, 69) -#define png_tRNS PNG_U32(116, 82, 78, 83) -#define png_zTXt PNG_U32(122, 84, 88, 116) -#endif - -/* The 8 byte signature as a pair of 32 bit quantities */ -#define sig1 PNG_U32(137, 80, 78, 71) -#define sig2 PNG_U32( 13, 10, 26, 10) - -/* Is the chunk critical? */ -#define CRITICAL(chunk) (((chunk) & PNG_U32(32,0,0,0)) == 0) - -/* Is it safe to copy? */ -#define SAFE_TO_COPY(chunk) (((chunk) & PNG_U32(0,0,0,32)) != 0) - -/* Fix ups for builds with limited read support */ -#ifndef PNG_ERROR_TEXT_SUPPORTED -# define png_error(a,b) png_err(a) -#endif - -/********************************* UTILITIES **********************************/ -/* UNREACHED is a value to cause an assert to fail. Because of the way the - * assert macro is written the string "UNREACHED" is produced in the error - * message. - */ -#define UNREACHED 0 - -/* 80-bit number handling - a PNG image can be up to (2^31-1)x(2^31-1) 8 byte - * (16-bit RGBA) pixels in size; that's less than 2^65 bytes or 2^68 bits, so - * arithmetic of 80-bit numbers is sufficient. This representation uses an - * arbitrary length array of png_uint_16 digits (0..65535). The representation - * is little endian. - * - * The arithmetic functions take zero to two uarb values together with the - * number of digits in those values and write the result to the given uarb - * (always the first argument) returning the number of digits in the result. - * If the result is negative the return value is also negative (this would - * normally be an error). - */ -typedef png_uint_16 udigit; /* A 'unum' is an array of these */ -typedef png_uint_16p uarb; -typedef png_const_uint_16p uarbc; - -#define UDIGITS(unum) ((sizeof unum)/(sizeof (udigit)) - /* IMPORTANT: only apply this to an array, applied to a pointer the result - * will typically be '2', which is not useful. - */ - -static int -uarb_set(uarb result, png_alloc_size_t val) - /* Set (initialize) 'result' to 'val'. The size required for 'result' must - * be determined by the caller from a knowledge of the maximum for 'val'. - */ -{ - int ndigits = 0; - - while (val > 0) - { - result[ndigits++] = (png_uint_16)(val & 0xffff); - val >>= 16; - } - - return ndigits; -} - -static int -uarb_copy(uarb to, uarb from, int idigits) - /* Copy a uarb, may reduce the digit count */ -{ - int d, odigits; - - for (d=odigits=0; d<idigits; ++d) - if ((to[d] = from[d]) != 0) - odigits = d+1; - - return odigits; -} - -static int -uarb_inc(uarb num, int in_digits, png_int_32 add) - /* This is a signed 32-bit add, except that to avoid overflow the value added - * or subtracted must be no more than 2^31-65536. A negative result - * indicates a negative number (which is an error below). The size of - * 'num' should be max(in_digits+1,2) for arbitrary 'add' but can be just - * in_digits+1 if add is known to be in the range -65535..65535. - */ -{ - FIX_GCC int out_digits = 0; - - while (out_digits < in_digits) - { - add += num[out_digits]; - num[out_digits++] = (png_uint_16)(add & 0xffff); - add >>= 16; - } - - while (add != 0 && add != (-1)) - { - num[out_digits++] = (png_uint_16)(add & 0xffff); - add >>= 16; - } - - if (add == 0) - { - while (out_digits > 0 && num[out_digits-1] == 0) - --out_digits; - return out_digits; /* may be 0 */ - } - - else /* negative result */ - { - while (out_digits > 1 && num[out_digits-1] == 0xffff) - --out_digits; - - return -out_digits; - } -} - -static int -uarb_add32(uarb num, int in_digits, png_uint_32 add) - /* As above but this works with any 32-bit value and only does 'add' */ -{ - if (in_digits > 0) - { - in_digits = uarb_inc(num, in_digits, add & 0xffff); - return uarb_inc(num+1, in_digits-1, add >> 16)+1; - } - - return uarb_set(num, add); -} - -static int -uarb_mult_digit(uarb acc, int a_digits, uarb num, FIX_GCC int n_digits, - png_uint_16 val) - /* Primitive one-digit multiply - 'val' must be 0..65535. Note that this - * primitive is a multiply and accumulate - the result of *num * val is added - * to *acc. - * - * This is a one-digit multiply, so the product may be up to one digit longer - * than 'num', however the add to 'acc' means that the caller must ensure - * that 'acc' is at least one digit longer than this *and* at least one digit - * longer than the current length of 'acc'. (Or the caller must otherwise - * ensure 'adigits' is adequate from knowledge of the values.) - */ -{ - /* The digits in *acc, *num and val are in the range 0..65535, so the - * result below is at most (65535*65535)+2*65635 = 65535*(65535+2), which is - * exactly 0xffffffff. - */ - if (val > 0 && n_digits > 0) /* Else the product is 0 */ - { - png_uint_32 carry = 0; - int out_digits = 0; - - while (out_digits < n_digits || carry > 0) - { - if (out_digits < a_digits) - carry += acc[out_digits]; - - if (out_digits < n_digits) - carry += (png_uint_32)num[out_digits] * val; - - acc[out_digits++] = (png_uint_16)(carry & 0xffff); - carry >>= 16; - } - - /* So carry is 0 and all the input digits have been consumed. This means - * that it is possible to skip any remaining digits in acc. - */ - if (out_digits > a_digits) - return out_digits; - } - - return a_digits; -} - -static int -uarb_mult32(uarb acc, int a_digits, uarb num, int n_digits, png_uint_32 val) - /* calculate acc += num * val, 'val' may be any 32-bit value, 'acc' and 'num' - * may be any value, returns the number of digits in 'acc'. - */ -{ - if (n_digits > 0 && val > 0) - { - a_digits = uarb_mult_digit(acc, a_digits, num, n_digits, - (png_uint_16)(val & 0xffff)); - - /* Because n_digits and val are >0 the following must be true: */ - assert(a_digits > 0); - - val >>= 16; - if (val > 0) - a_digits = uarb_mult_digit(acc+1, a_digits-1, num, n_digits, - (png_uint_16)val) + 1; - } - - return a_digits; -} - -static int -uarb_shift(uarb inout, int ndigits, unsigned int right_shift) - /* Shift inout right by right_shift bits, right_shift must be in the range - * 1..15 - */ -{ - FIX_GCC int i = ndigits; - png_uint_16 carry = 0; - - assert(right_shift >= 1 && right_shift <= 15); - - while (--i >= 0) - { - png_uint_16 temp = (png_uint_16)(carry | (inout[i] >> right_shift)); - - /* Bottom bits to top bits of carry */ - carry = (png_uint_16)((inout[i] << (16-right_shift)) & 0xffff); - - inout[i] = temp; - - /* The shift may reduce ndigits */ - if (i == ndigits-1 && temp == 0) - ndigits = i; - } - - return ndigits; -} - -static int -uarb_cmp(uarb a, int adigits, uarb b, int bdigits) - /* Return -1/0/+1 according as a<b/a==b/a>b */ -{ - if (adigits < bdigits) - return -1; - - if (adigits > bdigits) - return 1; - - while (adigits-- > 0) - if (a[adigits] < b[adigits]) - return -1; - - else if (a[adigits] > b[adigits]) - return 1; - - return 0; -} - -#if 0 /*UNUSED*/ -static int -uarb_eq32(uarb num, int digits, png_uint_32 val) - /* Return true if the uarb is equal to 'val' */ -{ - switch (digits) - { - case 0: return val == 0; - case 1: return val == num[0]; - case 2: return (val & 0xffff) == num[0] && (val >> 16) == num[1]; - default: return 0; - } -} -#endif - -static void -uarb_printx(uarb num, int digits, FILE *out) - /* Print 'num' as a hexadecimal number (easier than decimal!) */ -{ - while (digits > 0) - if (num[--digits] > 0) - { - fprintf(out, "0x%x", num[digits]); - - while (digits > 0) - fprintf(out, "%.4x", num[--digits]); - } - - else if (digits == 0) /* the number is 0 */ - fputs("0x0", out); -} - -static void -uarb_print(uarb num, int digits, FILE *out) - /* Prints 'num' as a decimal if it will fit in an unsigned long, else as a - * hexadecimal number. Notice that the results vary for images over 4GByte - * in a system dependent way, and the hexadecimal form doesn't work very well - * in awk script input. - * - * - * TODO: write uarb_div10 - */ -{ - if (digits * sizeof (udigit) > sizeof (unsigned long)) - uarb_printx(num, digits, out); - - else - { - unsigned long n = 0; - - while (digits > 0) - n = (n << 16) + num[--digits]; - - fprintf(out, "%lu", n); - } -} - -/* Generate random bytes. This uses a boring repeatable algorithm and it - * is implemented here so that it gives the same set of numbers on every - * architecture. It's a linear congruential generator (Knuth or Sedgewick - * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and - * Hill, "The Art of Electronics" (Pseudo-Random Bit Sequences and Noise - * Generation.) - * - * (Copied from contrib/libtests/pngvalid.c) - */ -static void -make_random_bytes(png_uint_32* seed, void* pv, size_t size) -{ - png_uint_32 u0 = seed[0], u1 = seed[1]; - png_bytep bytes = png_voidcast(png_bytep, pv); - - /* There are thirty-three bits; the next bit in the sequence is bit-33 XOR - * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. - */ - size_t i; - for (i=0; i<size; ++i) - { - /* First generate 8 new bits then shift them in at the end. */ - png_uint_32 u = ((u0 >> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; - u1 <<= 8; - u1 |= u0 >> 24; - u0 <<= 8; - u0 |= u; - *bytes++ = (png_byte)u; - } - - seed[0] = u0; - seed[1] = u1; -} - -/* Clear an object to a random value. */ -static void -clear(void *pv, size_t size) -{ - static png_uint_32 clear_seed[2] = { 0x12345678, 0x9abcdef0 }; - make_random_bytes(clear_seed, pv, size); -} - -#define CLEAR(object) clear(&(object), sizeof (object)) - -/* Copied from unreleased 1.7 code. - * - * CRC checking uses a local pre-built implementation of the Ethernet CRC32. - * This is to avoid a function call to the zlib DLL and to optimize the - * byte-by-byte case. - */ -static png_uint_32 crc_table[256] = -{ - 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, - 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, - 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, - 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, - 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, - 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, - 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, - 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, - 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, - 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, - 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, - 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, - 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, - 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, - 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, - 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, - 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, - 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, - 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, - 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, - 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, - 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, - 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, - 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, - 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, - 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, - 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, - 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, - 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, - 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, - 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, - 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, - 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, - 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, - 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, - 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, - 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, - 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, - 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, - 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, - 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, - 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, - 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, - 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, - 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, - 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, - 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, - 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, - 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, - 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, - 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, - 0x2d02ef8d -}; - -/* The CRC calculated here *IS* conditioned, the corresponding value used by - * zlib and the result value is obtained by XORing with CRC_INIT, which is also - * the first value that must be passed in (for the first byte) to crc_one_byte. - */ -#define CRC_INIT 0xffffffff - -static png_uint_32 -crc_one_byte(png_uint_32 crc, int b) -{ - return crc_table[(crc ^ b) & 0xff] ^ (crc >> 8); -} - -static png_uint_32 -crc_init_4(png_uint_32 value) -{ - /* This is an alternative to the algorithm used in zlib, which requires four - * separate tables to parallelize the four byte operations, it only works for - * a CRC of the first four bytes of the stream, but this is what happens in - * the parser below where length+chunk-name is read and chunk-name used to - * initialize the CRC. Notice that the calculation here avoids repeated - * conditioning (xor with 0xffffffff) by storing the conditioned value. - */ - png_uint_32 crc = crc_table[(~value >> 24)] ^ 0xffffff; - - crc = crc_table[(crc ^ (value >> 16)) & 0xff] ^ (crc >> 8); - crc = crc_table[(crc ^ (value >> 8)) & 0xff] ^ (crc >> 8); - return crc_table[(crc ^ value) & 0xff] ^ (crc >> 8); -} - -static int -chunk_type_valid(png_uint_32 c) - /* Bit whacking approach to chunk name validation that is intended to avoid - * branches. The cost is that it uses a lot of 32-bit constants, which might - * be bad on some architectures. - */ -{ - png_uint_32 t; - - /* Remove bit 5 from all but the reserved byte; this means every - * 8-bit unit must be in the range 65-90 to be valid. So bit 5 - * must be zero, bit 6 must be set and bit 7 zero. - */ - c &= ~PNG_U32(32,32,0,32); - t = (c & ~0x1f1f1f1f) ^ 0x40404040; - - /* Subtract 65 for each 8 bit quantity, this must not overflow - * and each byte must then be in the range 0-25. - */ - c -= PNG_U32(65,65,65,65); - t |=c ; - - /* Subtract 26, handling the overflow which should set the top - * three bits of each byte. - */ - c -= PNG_U32(25,25,25,26); - t |= ~c; - - return (t & 0xe0e0e0e0) == 0; -} - -/**************************** CONTROL INFORMATION *****************************/ - -/* Information about a sequence of IDAT chunks, the chunks have been re-synced - * using sync_stream below and the new lengths are recorded here. Because the - * number of chunks is unlimited this is handled using a linked list of these - * structures. - */ -struct IDAT_list -{ - struct IDAT_list *next; /* Linked list */ - unsigned int length; /* Actual length of the array below */ - unsigned int count; /* Number of entries that are valid */ -# define IDAT_INIT_LENGTH 16 - png_uint_32 lengths[IDAT_INIT_LENGTH]; -}; - -static void -IDAT_list_init(struct IDAT_list *list) -{ - CLEAR(*list); - - list->next = NULL; - list->length = IDAT_INIT_LENGTH; -} - -static size_t -IDAT_list_size(struct IDAT_list *list, unsigned int length) - /* Return the size in bytes of an IDAT_list of the given length. */ -{ - if (list != NULL) - length = list->length; - - return sizeof *list - sizeof list->lengths + - length * sizeof list->lengths[0]; -} - -static void -IDAT_list_end(struct IDAT_list *IDAT_list) -{ - struct IDAT_list *list = IDAT_list->next; - - CLEAR(*IDAT_list); - - while (list != NULL) - { - struct IDAT_list *next = list->next; - - clear(list, IDAT_list_size(list, 0)); - free(list); - list = next; - } -} - -static struct IDAT_list * -IDAT_list_extend(struct IDAT_list *tail) -{ - /* Use the previous cached value if available. */ - struct IDAT_list *next = tail->next; - - if (next == NULL) - { - /* Insert a new, malloc'ed, block of IDAT information buffers, this - * one twice as large as the previous one: - */ - unsigned int length = 2 * tail->length; - - if (length < tail->length) /* arithmetic overflow */ - length = tail->length; - - next = png_voidcast(IDAT_list*, malloc(IDAT_list_size(NULL, length))); - CLEAR(*next); - - /* The caller must handle this: */ - if (next == NULL) - return NULL; - - next->next = NULL; - next->length = length; - tail->next = next; - } - - return next; -} - -/* GLOBAL CONTROL STRUCTURE */ -struct global -{ - /* PUBLIC GLOBAL VARIABLES: OWNER INITIALIZE */ - unsigned int errors :1; /* print file errors to stderr */ - unsigned int warnings :1; /* print libpng warnings to stderr */ - unsigned int optimize_zlib :1; /* Run optimization search */ - unsigned int quiet :2; /* don't output summaries */ - unsigned int verbose :3; /* various internal tracking */ - unsigned int skip :3; /* Non-critical chunks to skip */ -# define SKIP_NONE 0 -# define SKIP_BAD_CRC 1 /* Chunks with a bad CRC */ -# define SKIP_UNSAFE 2 /* Chunks not safe to copy */ -# define SKIP_UNUSED 3 /* Chunks not used by libpng */ -# define SKIP_TRANSFORM 4 /* Chunks only used in transforms */ -# define SKIP_COLOR 5 /* Everything but tRNS, sBIT, gAMA and sRGB */ -# define SKIP_ALL 6 /* Everything but tRNS and sBIT */ - - png_uint_32 idat_max; /* 0 to perform no re-chunking */ - - int status_code; /* Accumulated status code */ -# define TOO_FAR_BACK 0x01 /* found a too-far-back error */ -# define CRC_ERROR 0x02 /* fixed an invalid CRC */ -# define STREAM_ERROR 0x04 /* damaged PNG stream (may be fixable) */ -# define TRUNCATED 0x08 /* truncated but still readable */ -# define FILE_ERROR 0x10 /* could not read the file */ -# define WRITE_ERROR 0x20 /* write error (this terminates the read) */ -# define INTERNAL_ERROR 0x40 /* internal limits/errors encountered */ - - /* PUBLIC GLOBAL VARIABLES: USED INTERNALLY BY IDAT READ CODE */ - struct IDAT_list idat_cache; /* Cache of file IDAT information buffers */ - /* The structure is shared across all uses of this global control - * structure to avoid reallocation between IDAT streams. - */ -}; - -static int -global_end(struct global *global) -{ - - int rc; - - IDAT_list_end(&global->idat_cache); - rc = global->status_code; - CLEAR(*global); - return rc; -} - -static void -global_init(struct global *global) - /* Call this once (and only once) to initialize the control */ -{ - CLEAR(*global); - - /* Globals */ - global->errors = 0; - global->warnings = 0; - global->quiet = 0; - global->verbose = 0; - global->idat_max = 0; /* no re-chunking of IDAT */ - global->optimize_zlib = 0; - global->skip = SKIP_NONE; - global->status_code = 0; - - IDAT_list_init(&global->idat_cache); -} - -static int -skip_chunk_type(const struct global *global, png_uint_32 type) - /* Return true if this chunk is to be skipped according to the --strip - * option. This code needs to recognize all known ancillary chunks in order - * to handle the --strip=unsafe option. - */ -{ - /* Never strip critical chunks: */ - if (CRITICAL(type)) - return 0; - - switch (type) - { - /* Chunks that are treated as, effectively, critical because they affect - * correct interpretation of the pixel values: - */ - case png_tRNS: case png_sBIT: - return 0; - - /* Chunks that specify gamma encoding which should therefore only be - * removed the the user insists: - */ - case png_gAMA: case png_sRGB: - if (global->skip >= SKIP_ALL) - return 1; - return 0; - - /* Chunks that affect color interpretation - not used by libpng and rarely - * used by applications, but technically still required for correct - * interpretation of the image data: - */ - case png_cHRM: case png_iCCP: - if (global->skip >= SKIP_COLOR) - return 1; - return 0; - - /* Other chunks that are used by libpng in image transformations (as - * opposed to known chunks that have get/set APIs but are not otherwise - * used.) - */ - case png_bKGD: - if (global->skip >= SKIP_TRANSFORM) - return 1; - return 0; - - /* All other chunks that libpng knows about and affect neither image - * interpretation nor libpng transforms - chunks that are effectively - * unused by libpng even though libpng might recognize and store them. - */ - case png_fRAc: case png_gIFg: case png_gIFt: case png_gIFx: case png_hIST: - case png_iTXt: case png_oFFs: case png_pCAL: case png_pHYs: case png_sCAL: - case png_sPLT: case png_sTER: case png_tEXt: case png_tIME: case png_zTXt: - if (global->skip >= SKIP_UNUSED) - return 1; - return 0; - - /* Chunks that libpng does not know about (notice that this depends on the - * list above including all known chunks!) The decision here depends on - * whether the safe-to-copy bit is set in the chunk type. - */ - default: - if (SAFE_TO_COPY(type)) - { - if (global->skip >= SKIP_UNUSED) /* as above */ - return 1; - } - - else if (global->skip >= SKIP_UNSAFE) - return 1; - - return 0; - } -} - -/* PER-FILE CONTROL STRUCTURE */ -struct chunk; -struct IDAT; -struct file -{ - /* ANCESTORS */ - struct global *global; - - /* PUBLIC PER-FILE VARIABLES: CALLER INITIALIZE */ - const char * file_name; - const char * out_name; /* Name of output file (if required) */ - - /* PUBLIC PER-FILE VARIABLES: SET BY PNG READ CODE */ - /* File specific result codes */ - int status_code; /* Set to a bit mask of the following: */ - int read_errno; /* Records a read error errno */ - int write_errno; /* Records a write error errno */ - - /* IHDR information */ - png_uint_32 width; - png_uint_32 height; - png_byte bit_depth; - png_byte color_type; - png_byte compression_method; - png_byte filter_method; - png_byte interlace_method; - - udigit image_bytes[5]; - int image_digits; - - /* PROTECTED PER-FILE VARIABLES: USED BY THE READ CODE */ - FILE * file; /* Original PNG file */ - FILE * out; /* If a new one is being written */ - jmp_buf jmpbuf; /* Set while reading a PNG */ - - /* PROTECTED CHUNK SPECIFIC VARIABLES: USED BY CHUNK CODE */ - /* The following variables are used during reading to record the length, type - * and data position of the *next* chunk or, right at the start, the - * signature (in length,type). - * - * When a chunk control structure is instantiated these values are copied - * into the structure and can then be overritten with the data for the next - * chunk. - */ - fpos_t data_pos; /* Position of first byte of chunk data */ - png_uint_32 length; /* First word (length or signature start) */ - png_uint_32 type; /* Second word (type or signature end) */ - png_uint_32 crc; /* Running chunk CRC (used by read_chunk) */ - - /* These counts are maintained by the read and write routines below and are - * reset by the chunk handling code. They record the total number of bytes - * read or written for the chunk, including the header (length,type) bytes. - */ - png_uint_32 read_count; /* Count of bytes read (in the chunk) */ - png_uint_32 write_count; /* Count of bytes written (in the chunk) */ - int state; /* As defined here: */ -# define STATE_SIGNATURE 0 /* The signature is being written */ -# define STATE_CHUNKS 1 /* Non-IDAT chunks are being written */ -# define STATE_IDAT 2 /* An IDAT stream is being written */ - - /* Two pointers used to enable clean-up in the event of fatal errors and to - * hold state about the parser process (only one of each at present.) - */ - struct chunk * chunk; - struct IDAT * idat; - - /* Interface to allocate a new chunk or IDAT control structure. The result - * is returned by setting one or other of the above variables. Note that the - * relevant initializer is called by the allocator function. The alloc_ptr - * is used only by the implementation of the allocate function. - */ - void * alloc_ptr; - void (*alloc)(struct file*,int idat); - /* idat: allocate IDAT not chunk */ -}; - -/* Valid longjmp (stop) codes are: */ -#define LIBPNG_WARNING_CODE 1 /* generic png_error */ -#define LIBPNG_ERROR_CODE 2 /* generic png_error */ -#define ZLIB_ERROR_CODE 3 /* generic zlib error */ -#define INVALID_ERROR_CODE 4 /* detected an invalid PNG */ -#define READ_ERROR_CODE 5 /* read failed */ -#define WRITE_ERROR_CODE 6 /* error in write */ -#define UNEXPECTED_ERROR_CODE 7 /* unexpected (internal?) error */ - -static void -emit_string(const char *str, FILE *out) - /* Print a string with spaces replaced by '_' and non-printing characters by - * an octal escape. - */ -{ - for (; *str; ++str) - if (isgraph(UCHAR_MAX & *str)) - putc(*str, out); - - else if (isspace(UCHAR_MAX & *str)) - putc('_', out); - - else - fprintf(out, "\\%.3o", *str); -} - -static const char * -strcode(int code) -{ - switch (code) - { - case LIBPNG_WARNING_CODE: return "warning"; - case LIBPNG_ERROR_CODE: return "libpng"; - case ZLIB_ERROR_CODE: return "zlib"; - case INVALID_ERROR_CODE: return "invalid"; - case READ_ERROR_CODE: return "read"; - case WRITE_ERROR_CODE: return "write"; - case UNEXPECTED_ERROR_CODE: return "unexpected"; - default: return "INVALID"; - } -} - -static void -emit_error(struct file *file, int code, const char *what) - /* Generic error message routine, takes a 'stop' code but can be used - * elsewhere. Always outputs a message. - */ -{ - const char *reason; - int err = 0; - - switch (code) - { - case LIBPNG_WARNING_CODE: reason = "libpng warning:"; break; - case LIBPNG_ERROR_CODE: reason = "libpng error:"; break; - case ZLIB_ERROR_CODE: reason = "zlib error:"; break; - case INVALID_ERROR_CODE: reason = "invalid"; break; - case READ_ERROR_CODE: reason = "read failure:"; - err = file->read_errno; - break; - case WRITE_ERROR_CODE: reason = "write error"; - err = file->write_errno; - break; - case UNEXPECTED_ERROR_CODE: reason = "unexpected error:"; - err = file->read_errno; - if (err == 0) - err = file->write_errno; - break; - default: reason = "INVALID (internal error):"; break; - } - - if (err != 0) - fprintf(stderr, "%s: %s %s [%s]\n", file->file_name, reason, what, - strerror(err)); - - else - fprintf(stderr, "%s: %s %s\n", file->file_name, reason, what); -} - -static void chunk_end(struct chunk **); -static void IDAT_end(struct IDAT **); - -static int -file_end(struct file *file) -{ - int rc; - - /* If either of the chunk pointers are set end them here, the IDAT structure - * must be deallocated first as it may deallocate the chunk structure. - */ - if (file->idat != NULL) - IDAT_end(&file->idat); - - if (file->chunk != NULL) - chunk_end(&file->chunk); - - rc = file->status_code; - - if (file->file != NULL) - (void)fclose(file->file); - - if (file->out != NULL) - { - /* NOTE: this is bitwise |, all the following functions must execute and - * must succeed. - */ - if (ferror(file->out) | fflush(file->out) | fclose(file->out)) - { - perror(file->out_name); - emit_error(file, READ_ERROR_CODE, "output write error"); - rc |= WRITE_ERROR; - } - } - - /* Accumulate the result codes */ - file->global->status_code |= rc; - - CLEAR(*file); - - return rc; /* status code: non-zero on read or write error */ -} - -static int -file_init(struct file *file, struct global *global, const char *file_name, - const char *out_name, void *alloc_ptr, void (*alloc)(struct file*,int)) - /* Initialize a file control structure. This will open the given files as - * well. The status code returned is 0 on success, non zero (using the flags - * above) on a file open error. - */ -{ - CLEAR(*file); - file->global = global; - - file->file_name = file_name; - file->out_name = out_name; - file->status_code = 0; - file->read_errno = 0; - file->write_errno = 0; - - file->file = NULL; - file->out = NULL; - /* jmpbuf is garbage: must be set by read_png */ - - file->read_count = 0; - file->state = STATE_SIGNATURE; - - file->chunk = NULL; - file->idat = NULL; - - file->alloc_ptr = alloc_ptr; - file->alloc = alloc; - - /* Open the files: */ - assert(file_name != NULL); - file->file = fopen(file_name, "rb"); - - if (file->file == NULL) - { - file->read_errno = errno; - file->status_code |= FILE_ERROR; - /* Always output: please give a readable file! */ - perror(file_name); - return FILE_ERROR; - } - - if (out_name != NULL) - { - file->out = fopen(out_name, "wb"); - - if (file->out == NULL) - { - file->write_errno = errno; - file->status_code |= WRITE_ERROR; - perror(out_name); - return WRITE_ERROR; - } - } - - return 0; -} - -static void -log_error(struct file *file, int code, const char *what) - /* Like emit_error but checks the global 'errors' flag */ -{ - if (file->global->errors) - emit_error(file, code, what); -} - -static char -type_char(png_uint_32 v) -{ - /* In fact because chunk::chunk_type is validated prior to any call to this - * function it will always return a-zA-Z, but the extra codes are just there - * to help in finding internal (programming) errors. Note that the code only - * ever considers the low 7 bits of the value (so it is not necessary for the - * type_name function to mask of the byte.) - */ - if (v & 32) - return "!abcdefghijklmnopqrstuvwxyz56789"[(v-96)&31]; - - else - return "@ABCDEFGHIJKLMNOPQRSTUVWXYZ01234"[(v-64)&31]; -} - -static void -type_name(png_uint_32 type, FILE *out) -{ - putc(type_char(type >> 24), out); - putc(type_char(type >> 16), out); - putc(type_char(type >> 8), out); - putc(type_char(type ), out); -} - -static void -type_sep(FILE *out) -{ - putc(':', out); - putc(' ', out); -} - -static png_uint_32 current_type(struct file *file, int code); - -PNG_NORETURN static void -stop(struct file *file, int code, const char *what) - /* Return control when a PNG file cannot be read. This outputs an 'ERR' - * summary line too. - */ -{ - log_error(file, code, what); - - /* The chunk being read is typically identified by file->chunk or, if this is - * NULL, by file->type. This may be wrong if libpng reads ahead, but this - * only happens with IDAT where libpng reads the header then jumps around - * finding errors in the previous chunks. We know that is happening because - * we are at the start of the IDAT (i.e. no IDAT data has yet been written.) - * - * SUMMARY FORMAT (stop): - * - * IDAT ERR status code read-errno write-errno message file - * - * 'uncompressed' will be 0 if there was a problem in the IHDR. The errno - * values are emit_string(strerror(errno)). - */ - if (file->global->quiet < 2) /* need two quiets to stop this. */ - { - png_uint_32 type; - - if (file->chunk != NULL) - type = current_type(file, code); /* Gropes in struct chunk and IDAT */ - - else - type = file->type; - - if (type) - type_name(type, stdout); - - else /* magic: an IDAT header, produces bogons for too many IDATs */ - fputs("HEAD", stdout); /* not a registered chunk! */ - - printf(" ERR %.2x %s ", file->status_code, strcode(code)); - /* This only works one strerror at a time, because of the way strerror is - * implemented. - */ - emit_string(strerror(file->read_errno), stdout); - putc(' ', stdout); - emit_string(strerror(file->write_errno), stdout); - putc(' ', stdout); - emit_string(what, stdout); - putc(' ', stdout); - fputs(file->file_name, stdout); - putc('\n', stdout); - } - - file->status_code |= FILE_ERROR; - longjmp(file->jmpbuf, code); -} - -PNG_NORETURN static void -stop_invalid(struct file *file, const char *what) -{ - stop(file, INVALID_ERROR_CODE, what); -} - -static void -type_message(struct file *file, png_uint_32 type, const char *what) - /* Error message for a chunk; the chunk name comes from 'type' */ -{ - if (file->global->errors) - { - fputs(file->file_name, stderr); - type_sep(stderr); - type_name(type, stderr); - type_sep(stderr); - fputs(what, stderr); - putc('\n', stderr); - } -} - -/* Input file positioning - we jump around in the input file while reading - * stuff, these wrappers deal with the error handling. - */ -static void -file_getpos(struct file *file, fpos_t *pos) -{ - if (fgetpos(file->file, pos)) - { - /* This is unexpected, so perror it */ - perror(file->file_name); - stop(file, READ_ERROR_CODE, "fgetpos"); - } -} - -static void -file_setpos(struct file *file, const fpos_t *pos) -{ - if (fsetpos(file->file, pos)) - { - perror(file->file_name); - stop(file, READ_ERROR_CODE, "fsetpos"); - } -} - -static void -getpos(struct file *file) - /* Get the current position and store it in 'data_pos'. The corresponding - * setpos() function is chunk specific because it uses the copy of the - * position for the specific chunk. - */ -{ - file_getpos(file, &file->data_pos); -} - - -/* Read utility - read a single byte, returns a value in the range 0..255 or EOF - * on a read error. In the latter case status_code and read_errno are updated - * appropriately. - */ -static int -read_byte(struct file *file) -{ - int ch = getc(file->file); - - if (ch >= 0 && ch <= 255) - { - ++(file->read_count); - return ch; - } - - else if (ch != EOF) - { - file->status_code |= INTERNAL_ERROR; - file->read_errno = ERANGE; /* out of range character */ - - /* This is very unexpected; an error message is always output: */ - emit_error(file, UNEXPECTED_ERROR_CODE, "file read"); - } - -# ifdef EINTR - else if (errno == EINTR) /* Interrupted, try again */ - { - errno = 0; - return read_byte(file); - } -# endif - - else - { - /* An error, it doesn't really matter what the error is but it gets - * recorded anyway. - */ - if (ferror(file->file)) - file->read_errno = errno; - - else if (feof(file->file)) - file->read_errno = 0; /* I.e. a regular EOF, no error */ - - else /* unexpected */ - file->read_errno = EDOM; - } - - /* 'TRUNCATED' is used for all cases of failure to read a byte, because of - * the way libpng works a byte read is never attempted unless the byte is - * expected to be there, so EOF should not occur. - */ - file->status_code |= TRUNCATED; - return EOF; -} - -static png_byte -reread_byte(struct file *file) - /* Read a byte when an error is not expected to happen because the byte has - * been read before without error. - */ -{ - int ch = getc(file->file); - - if (errno != 0) - file->read_errno = errno; - - if (ch < 0 || ch > 255) - stop(file, UNEXPECTED_ERROR_CODE, "reread"); - - return (png_byte)ch; -} - -static png_uint_32 -reread_4(struct file *file) - /* The same but for a four byte quantity */ -{ - png_uint_32 result = 0; - int i = 0; - - while (++i <= 4) - result = (result << 8) + reread_byte(file); - - return result; -} - -static void -skip_12(struct file *file) - /* Skip exactly 12 bytes in the input stream - used to skip a CRC and chunk - * header that has been read before. - */ -{ - /* Since the chunks were read before this shouldn't fail: */ - if (fseek(file->file, 12, SEEK_CUR) != 0) - { - if (errno != 0) - file->read_errno = errno; - - stop(file, UNEXPECTED_ERROR_CODE, "reskip"); - } -} - -static void -write_byte(struct file *file, int b) - /* Write one byte to the output - this causes a fatal error if the write - * fails and the read of this PNG file immediately terminates. Just - * increments the write count if there is no output file. - */ -{ - if (file->out != NULL) - { - if (putc(b, file->out) != b) - { - file->write_errno = errno; - file->status_code |= WRITE_ERROR; - stop(file, WRITE_ERROR_CODE, "write byte"); - } - } - - ++(file->write_count); -} - -/* Derivatives of the read/write functions. */ -static unsigned int -read_4(struct file *file, png_uint_32 *pu) - /* Read four bytes, returns the number of bytes read successfully and, if all - * four bytes are read, assigns the result to *pu. - */ -{ - unsigned int i = 0; - png_uint_32 val = 0; - - do - { - int ch = read_byte(file); - - if (ch == EOF) - return i; - - val = (val << 8) + ch; - } while (++i < 4); - - *pu = val; - return i; -} - -/* CRC handling - read but calculate the CRC while doing so. */ -static int -crc_read_many(struct file *file, png_uint_32 length) - /* Reads 'length' bytes and updates the CRC, returns true on success, false - * if the input is truncated. - */ -{ - if (length > 0) - { - png_uint_32 crc = file->crc; - - do - { - int ch = read_byte(file); - - if (ch == EOF) - return 0; /* Truncated */ - - crc = crc_one_byte(crc, ch); - } - while (--length > 0); - - file->crc = crc; - } - - return 1; /* OK */ -} - -static int -calc_image_size(struct file *file) - /* Fill in the image_bytes field given the IHDR information, calls stop on - * error. - */ -{ - png_uint_16 pd = file->bit_depth; - - switch (file->color_type) - { - default: - stop_invalid(file, "IHDR: colour type"); - - invalid_bit_depth: - stop_invalid(file, "IHDR: bit depth"); - - case 0: /* g */ - if (pd != 1 && pd != 2 && pd != 4 && pd != 8 && pd != 16) - goto invalid_bit_depth; - break; - - case 3: - if (pd != 1 && pd != 2 && pd != 4 && pd != 8) - goto invalid_bit_depth; - break; - - case 2: /* rgb */ - if (pd != 8 && pd != 16) - goto invalid_bit_depth; - - pd = (png_uint_16)(pd * 3); - break; - - case 4: /* ga */ - if (pd != 8 && pd != 16) - goto invalid_bit_depth; - - pd = (png_uint_16)(pd * 2); - break; - - case 6: /* rgba */ - if (pd != 8 && pd != 16) - goto invalid_bit_depth; - - pd = (png_uint_16)(pd * 4); - break; - } - - if (file->width < 1 || file->width > 0x7fffffff) - stop_invalid(file, "IHDR: width"); - - else if (file->height < 1 || file->height > 0x7fffffff) - stop_invalid(file, "IHDR: height"); - - else if (file->compression_method != 0) - stop_invalid(file, "IHDR: compression method"); - - else if (file->filter_method != 0) - stop_invalid(file, "IHDR: filter method"); - - else switch (file->interlace_method) - { - case PNG_INTERLACE_ADAM7: - /* Interlacing makes the image larger because of the replication of - * both the filter byte and the padding to a byte boundary. - */ - { - int pass; - int image_digits = 0; - udigit row_width[2], row_bytes[3]; - - for (pass=0; pass<=6; ++pass) - { - png_uint_32 pw = PNG_PASS_COLS(file->width, pass); - - if (pw > 0) - { - int digits; - - /* calculate 1+((pw*pd+7)>>3) in row_bytes */ - digits = uarb_mult_digit(row_bytes, uarb_set(row_bytes, 7), - row_width, uarb_set(row_width, pw), pd); - digits = uarb_shift(row_bytes, digits, 3); - digits = uarb_inc(row_bytes, digits, 1); - - /* Add row_bytes * pass-height to the file image_bytes field - */ - image_digits = uarb_mult32(file->image_bytes, image_digits, - row_bytes, digits, - PNG_PASS_ROWS(file->height, pass)); - } - } - - file->image_digits = image_digits; - } - break; - - case PNG_INTERLACE_NONE: - { - int digits; - udigit row_width[2], row_bytes[3]; - - /* As above, but use image_width in place of the pass width: */ - digits = uarb_mult_digit(row_bytes, uarb_set(row_bytes, 7), - row_width, uarb_set(row_width, file->width), pd); - digits = uarb_shift(row_bytes, digits, 3); - digits = uarb_inc(row_bytes, digits, 1); - - /* Set row_bytes * image-height to the file image_bytes field */ - file->image_digits = uarb_mult32(file->image_bytes, 0, - row_bytes, digits, file->height); - } - break; - - default: - stop_invalid(file, "IHDR: interlace method"); - } - - assert(file->image_digits >= 1 && file->image_digits <= 5); - return 1; -} - -/* PER-CHUNK CONTROL STRUCTURE - * This structure is instantiated for each chunk, except for the IDAT chunks - * where one chunk control structure is used for the whole of a single stream of - * IDAT chunks (see the IDAT control structure below). - */ -struct chunk -{ - /* ANCESTORS */ - struct file * file; - struct global * global; - - /* PUBLIC IDAT INFORMATION: SET BY THE ZLIB CODE */ - udigit uncompressed_bytes[5]; - int uncompressed_digits; - udigit compressed_bytes[5]; - int compressed_digits; - - /* PUBLIC PER-CHUNK INFORMATION: USED BY CHUNK READ CODE */ - /* This information is filled in by chunk_init from the data in the file - * control structure, but chunk_length may be changed later. - */ - fpos_t chunk_data_pos; /* Position of first byte of chunk data */ - png_uint_32 chunk_length; /* From header (or modified below) */ - png_uint_32 chunk_type; /* From header */ - - /* PUBLIC PER-CHUNK INFORMATION: FOR THE CHUNK WRITE CODE */ - png_uint_32 write_crc; /* Output CRC (may differ from read_crc) */ - png_uint_32 rewrite_offset; /* Count of bytes before rewrite. */ - int rewrite_length; /* Number of bytes left to change */ - png_byte rewrite_buffer[2]; /* Buffer of new byte values */ -}; - -static void -chunk_message(struct chunk *chunk, const char *message) -{ - type_message(chunk->file, chunk->chunk_type, message); -} - -static void -chunk_end(struct chunk **chunk_var) -{ - struct chunk *chunk = *chunk_var; - - *chunk_var = NULL; - CLEAR(*chunk); -} - -static void -chunk_init(struct chunk * const chunk, struct file * const file) - /* When a chunk is initialized the file length/type/pos are copied into the - * corresponding chunk fields and the new chunk is registered in the file - * structure. There can only be one chunk at a time. - * - * NOTE: this routine must onely be called from the file alloc routine! - */ -{ - assert(file->chunk == NULL); - - CLEAR(*chunk); - - chunk->file = file; - chunk->global = file->global; - - chunk->chunk_data_pos = file->data_pos; - chunk->chunk_length = file->length; - chunk->chunk_type = file->type; - - /* Compresssed/uncompressed size information (from the zlib control structure - * that is used to check the compressed data in a chunk.) - */ - chunk->uncompressed_digits = 0; - chunk->compressed_digits = 0; - - file->chunk = chunk; -} - -static png_uint_32 -current_type(struct file *file, int code) - /* Guess the actual chunk type that causes a stop() */ -{ - /* This may return png_IDAT for errors detected (late) in the header; that - * includes any inter-chunk consistency check that libpng performs. Assume - * that if the chunk_type is png_IDAT and the file write count is 8 this is - * what is happening. - */ - if (file->chunk != NULL) - { - png_uint_32 type = file->chunk->chunk_type; - - /* This is probably wrong for the excess IDATs case, because then libpng - * whines about too many of them (apparently in some cases erroneously) - * when the header is read. - */ - if (code <= LIBPNG_ERROR_CODE && type == png_IDAT && - file->write_count == 8) - type = 0; /* magic */ - - return type; - } - - else - return file->type; -} - -static void -setpos(struct chunk *chunk) - /* Reset the position to 'chunk_data_pos' - the start of the data for this - * chunk. As a side effect the read_count in the file is reset to 8, just - * after the length/type header. - */ -{ - chunk->file->read_count = 8; - file_setpos(chunk->file, &chunk->chunk_data_pos); -} - -/* Specific chunk handling - called for each chunk header, all special chunk - * processing is initiated in these functions. - */ -/* The next functions handle special processing for those chunks with LZ data, - * the data is identified and checked for validity. If there are problems which - * cannot be corrected the routines return false, otherwise true (although - * modification to the zlib header may be required.) - * - * The compressed data is in zlib format (RFC1950) and consequently has a - * minimum length of 7 bytes. - */ -static int zlib_check(struct file *file, png_uint_32 offset); - -static int -process_zTXt_iCCP(struct file *file) - /* zTXt and iCCP have exactly the same form - keyword, null, compression - * method then compressed data. - */ -{ - struct chunk *chunk = file->chunk; - png_uint_32 length; - png_uint_32 index = 0; - - assert(chunk != NULL && file->idat == NULL); - length = chunk->chunk_length; - setpos(chunk); - - while (length >= 9) - { - --length; - ++index; - if (reread_byte(file) == 0) /* keyword null terminator */ - { - --length; - ++index; - (void)reread_byte(file); /* compression method */ - return zlib_check(file, index); - } - } - - chunk_message(chunk, "too short"); - return 0; /* skip */ -} - -static int -process_iTXt(struct file *file) -{ - /* Like zTXt but more fields. */ - struct chunk *chunk = file->chunk; - png_uint_32 length; - png_uint_32 index = 0; - - assert(chunk != NULL && file->idat == NULL); - length = chunk->chunk_length; - setpos(chunk); - - while (length >= 5) - { - --length; - ++index; - if (reread_byte(file) == 0) /* keyword null terminator */ - { - --length; - ++index; - if (reread_byte(file) == 0) /* uncompressed text */ - return 1; /* nothing to check */ - - --length; - ++index; - (void)reread_byte(file); /* compression method */ - - /* Skip the language tag (null terminated). */ - while (length >= 9) - { - --length; - ++index; - if (reread_byte(file) == 0) /* terminator */ - { - /* Skip the translated keyword */ - while (length >= 8) - { - --length; - ++index; - if (reread_byte(file) == 0) /* terminator */ - return zlib_check(file, index); - } - } - } - - /* Ran out of bytes in the compressed case. */ - break; - } - } - - log_error(file, INVALID_ERROR_CODE, "iTXt chunk length"); - - return 0; /* skip */ -} - -/* IDAT READ/WRITE CONTROL STRUCTURE */ -struct IDAT -{ - /* ANCESTORS */ - struct file * file; - struct global * global; - - /* PROTECTED IDAT INFORMATION: SET BY THE IDAT READ CODE */ - struct IDAT_list *idat_list_head; /* START of the list of IDAT information */ - struct IDAT_list *idat_list_tail; /* *END* of the list of IDAT information */ - - /* PROTECTED IDAT INFORMATION: USED BY THE IDAT WRITE CODE */ - struct IDAT_list *idat_cur; /* Current list entry */ - unsigned int idat_count; /* And the *current* index into the list */ - png_uint_32 idat_index; /* Index of *next* input byte to write */ - png_uint_32 idat_length; /* Cache of current chunk length */ -}; - -/* NOTE: there is currently no IDAT_reset, so a stream cannot contain more than - * one IDAT sequence (i.e. MNG is not supported). - */ - -static void -IDAT_end(struct IDAT **idat_var) -{ - struct IDAT *idat = *idat_var; - struct file *file = idat->file; - - *idat_var = NULL; - - CLEAR(*idat); - - assert(file->chunk != NULL); - chunk_end(&file->chunk); - - /* Regardless of why the IDAT was killed set the state back to CHUNKS (it may - * already be CHUNKS because the state isn't changed until process_IDAT - * returns; a stop will cause IDAT_end to be entered in state CHUNKS!) - */ - file->state = STATE_CHUNKS; -} - -static void -IDAT_init(struct IDAT * const idat, struct file * const file) - /* When the chunk is png_IDAT instantiate an IDAT control structure in place - * of a chunk control structure. The IDAT will instantiate a chunk control - * structure using the file alloc routine. - * - * NOTE: this routine must only be called from the file alloc routine! - */ -{ - assert(file->chunk == NULL); - assert(file->idat == NULL); - - CLEAR(*idat); - - idat->file = file; - idat->global = file->global; - - /* Initialize the tail to the pre-allocated buffer and set the count to 0 - * (empty.) - */ - idat->global->idat_cache.count = 0; - idat->idat_list_head = idat->idat_list_tail = &idat->global->idat_cache; - - /* Now the chunk. The allocator calls the initializer of the new chunk and - * stores the result in file->chunk: - */ - file->alloc(file, 0/*chunk*/); - assert(file->chunk != NULL); - - /* And store this for cleanup (and to check for double alloc or failure to - * free.) - */ - file->idat = idat; -} - -static png_uint_32 -rechunk_length(struct IDAT *idat) - /* Return the length for the next IDAT chunk, taking into account - * rechunking. - */ -{ - png_uint_32 len = idat->global->idat_max; - - if (len == 0) /* use original chunk lengths */ - { - const struct IDAT_list *cur; - unsigned int count; - - if (idat->idat_index == 0) /* at the new chunk (first time) */ - return idat->idat_length; /* use the cache */ - - /* Otherwise rechunk_length is called at the end of a chunk for the length - * of the next one. - */ - cur = idat->idat_cur; - count = idat->idat_count; - - assert(idat->idat_index == idat->idat_length && - idat->idat_length == cur->lengths[count]); - - /* Return length of the *next* chunk */ - if (++count < cur->count) - return cur->lengths[count]; - - /* End of this list */ - assert(cur != idat->idat_list_tail); - cur = cur->next; - assert(cur != NULL && cur->count > 0); - return cur->lengths[0]; - } - - else /* rechunking */ - { - /* The chunk size is the lesser of file->idat_max and the number - * of remaining bytes. - */ - png_uint_32 have = idat->idat_length - idat->idat_index; - - if (len > have) - { - struct IDAT_list *cur = idat->idat_cur; - unsigned int j = idat->idat_count+1; /* the next IDAT in the list */ - - do - { - /* Add up the remaining bytes. This can't overflow because the - * individual lengths are always <= 0x7fffffff, so when we add two - * of them overflow is not possible. - */ - assert(cur != NULL); - - for (;;) - { - /* NOTE: IDAT_list::count here, not IDAT_list::length */ - for (; j < cur->count; ++j) - { - have += cur->lengths[j]; - if (len <= have) - return len; - } - - /* If this was the end return the count of the available bytes */ - if (cur == idat->idat_list_tail) - return have; - - cur = cur->next; - j = 0; - } - } - while (len > have); - } - - return len; - } -} - -static int -process_IDAT(struct file *file) - /* Process the IDAT stream, this is the more complex than the preceding - * cases because the compressed data is spread across multiple IDAT chunks - * (typically). Rechunking of the data is not handled here; all this - * function does is establish whether the zlib header needs to be modified. - * - * Initially the function returns false, indicating that the chunk should not - * be written. It does this until the last IDAT chunk is passed in, then it - * checks the zlib data and returns true. - * - * It does not return false on a fatal error; it calls stop instead. - * - * The caller must have an instantiated (IDAT) control structure and it must - * have extent over the whole read of the IDAT stream. For a PNG this means - * the whole PNG read, for MNG it could have lesser extent. - */ -{ - struct IDAT_list *list; - - assert(file->idat != NULL && file->chunk != NULL); - - /* We need to first check the entire sequence of IDAT chunks to ensure the - * stream is in sync. Do this by building a list of all the chunks and - * recording the length of each because the length may have been fixed up by - * sync_stream below. - * - * At the end of the list of chunks, where the type of the next chunk is not - * png_IDAT, process the whole stream using the list data to check validity - * then return control to the start and rewrite everything. - */ - list = file->idat->idat_list_tail; - - if (list->count == list->length) - { - list = IDAT_list_extend(list); - - if (list == NULL) - stop(file, READ_ERROR_CODE, "out of memory"); - - /* Move to the next block */ - list->count = 0; - file->idat->idat_list_tail = list; - } - - /* And fill in the next IDAT information buffer. */ - list->lengths[(list->count)++] = file->chunk->chunk_length; - - /* The type of the next chunk was recorded in the file control structure by - * the caller, if this is png_IDAT return 'skip' to the caller. - */ - if (file->type == png_IDAT) - return 0; /* skip this for the moment */ - - /* This is the final IDAT chunk, so run the tests to check for the too far - * back error and possibly optimize the window bits. This means going back - * to the start of the first chunk data, which is stored in the original - * chunk allocation. - */ - setpos(file->chunk); - - if (zlib_check(file, 0)) - { - struct IDAT *idat; - int cmp; - - /* The IDAT stream was successfully uncompressed; see whether it - * contained the correct number of bytes of image data. - */ - cmp = uarb_cmp(file->image_bytes, file->image_digits, - file->chunk->uncompressed_bytes, file->chunk->uncompressed_digits); - - if (cmp < 0) - type_message(file, png_IDAT, "extra uncompressed data"); - - else if (cmp > 0) - stop(file, LIBPNG_ERROR_CODE, "IDAT: uncompressed data too small"); - - /* Return the stream to the start of the first IDAT chunk; the length - * is set in the write case below but the input chunk variables must be - * set (once) here: - */ - setpos(file->chunk); - - idat = file->idat; - idat->idat_cur = idat->idat_list_head; - idat->idat_length = idat->idat_cur->lengths[0]; - idat->idat_count = 0; /* Count of chunks read in current list */ - idat->idat_index = 0; /* Index into chunk data */ - - /* Update the chunk length to the correct value for the IDAT chunk: */ - file->chunk->chunk_length = rechunk_length(idat); - - /* Change the state to writing IDAT chunks */ - file->state = STATE_IDAT; - - return 1; - } - - else /* Failure to decompress the IDAT stream; give up. */ - stop(file, ZLIB_ERROR_CODE, "could not uncompress IDAT"); -} - -/* ZLIB CONTROL STRUCTURE */ -struct zlib -{ - /* ANCESTORS */ - struct IDAT * idat; /* NOTE: May be NULL */ - struct chunk * chunk; - struct file * file; - struct global *global; - - /* GLOBAL ZLIB INFORMATION: SET BY THE CALLER */ - png_uint_32 rewrite_offset; - - /* GLOBAL ZLIB INFORMATION: SET BY THE ZLIB READ CODE */ - udigit compressed_bytes[5]; - int compressed_digits; - udigit uncompressed_bytes[5]; - int uncompressed_digits; - int file_bits; /* window bits from the file */ - int ok_bits; /* Set <16 on a successful read */ - int cksum; /* Set on a checksum error */ - - /* PROTECTED ZLIB INFORMATION: USED BY THE ZLIB ROUTINES */ - z_stream z; - png_uint_32 extra_bytes; /* Count of extra compressed bytes */ - int state; - int rc; /* Last return code */ - int window_bits; /* 0 if no change */ - png_byte header[2]; -}; - -static const char * -zlib_flevel(struct zlib *zlib) -{ - switch (zlib->header[1] >> 6) - { - case 0: return "supfast"; - case 1: return "stdfast"; - case 2: return "default"; - case 3: return "maximum"; - default: assert(UNREACHED); - } - - return "COMPILER BUG"; -} - -static const char * -zlib_rc(struct zlib *zlib) - /* Return a string for the zlib return code */ -{ - switch (zlib->rc) - { - case Z_OK: return "Z_OK"; - case Z_STREAM_END: return "Z_STREAM_END"; - case Z_NEED_DICT: return "Z_NEED_DICT"; - case Z_ERRNO: return "Z_ERRNO"; - case Z_STREAM_ERROR: return "Z_STREAM_ERROR"; - case Z_DATA_ERROR: return "Z_DATA_ERROR"; - case Z_MEM_ERROR: return "Z_MEM_ERROR"; - case Z_BUF_ERROR: return "Z_BUF_ERROR"; - case Z_VERSION_ERROR: return "Z_VERSION_ERROR"; - default: return "Z_*INVALID_RC*"; - } -} - -static void -zlib_message(struct zlib *zlib, int unexpected) - /* Output a message given a zlib rc */ -{ - if (zlib->global->errors) - { - const char *reason = zlib->z.msg; - - if (reason == NULL) - reason = "[no message]"; - - fputs(zlib->file->file_name, stderr); - type_sep(stderr); - type_name(zlib->chunk->chunk_type, stderr); - fprintf(stderr, ": %szlib error: %d (%s) (%s)\n", - unexpected ? "unexpected " : "", zlib->rc, zlib_rc(zlib), reason); - } -} - -static void -zlib_end(struct zlib *zlib) -{ - /* Output the summary line now; this ensures a summary line always gets - * output regardless of the manner of exit. - */ - if (!zlib->global->quiet) - { - if (zlib->ok_bits < 16) /* stream was read ok */ - { - const char *reason; - - if (zlib->cksum) - reason = "CHK"; /* checksum error */ - - else if (zlib->ok_bits > zlib->file_bits) - reason = "TFB"; /* fixing a too-far-back error */ - - else if (zlib->ok_bits == zlib->file_bits) - reason = "OK "; - - else - reason = "OPT"; /* optimizing window bits */ - - /* SUMMARY FORMAT (for a successful zlib inflate): - * - * IDAT reason flevel file-bits ok-bits compressed uncompressed file - */ - type_name(zlib->chunk->chunk_type, stdout); - printf(" %s %s %d %d ", reason, zlib_flevel(zlib), zlib->file_bits, - zlib->ok_bits); - uarb_print(zlib->compressed_bytes, zlib->compressed_digits, stdout); - putc(' ', stdout); - uarb_print(zlib->uncompressed_bytes, zlib->uncompressed_digits, - stdout); - putc(' ', stdout); - fputs(zlib->file->file_name, stdout); - putc('\n', stdout); - } - - else - { - /* This is a zlib read error; the chunk will be skipped. For an IDAT - * stream this will also cause a fatal read error (via stop()). - * - * SUMMARY FORMAT: - * - * IDAT SKP flevel file-bits z-rc compressed message file - * - * z-rc is the zlib failure code; message is the error message with - * spaces replaced by '-'. The compressed byte count indicates where - * in the zlib stream the error occured. - */ - type_name(zlib->chunk->chunk_type, stdout); - printf(" SKP %s %d %s ", zlib_flevel(zlib), zlib->file_bits, - zlib_rc(zlib)); - uarb_print(zlib->compressed_bytes, zlib->compressed_digits, stdout); - putc(' ', stdout); - emit_string(zlib->z.msg ? zlib->z.msg : "[no_message]", stdout); - putc(' ', stdout); - fputs(zlib->file->file_name, stdout); - putc('\n', stdout); - } - } - - if (zlib->state >= 0) - { - zlib->rc = inflateEnd(&zlib->z); - - if (zlib->rc != Z_OK) - zlib_message(zlib, 1/*unexpected*/); - } - - CLEAR(*zlib); -} - -static int -zlib_reset(struct zlib *zlib, int window_bits) - /* Reinitializes a zlib with a different window_bits */ -{ - assert(zlib->state >= 0); /* initialized by zlib_init */ - - zlib->z.next_in = Z_NULL; - zlib->z.avail_in = 0; - zlib->z.next_out = Z_NULL; - zlib->z.avail_out = 0; - - zlib->window_bits = window_bits; - zlib->compressed_digits = 0; - zlib->uncompressed_digits = 0; - - zlib->state = 0; /* initialized, once */ - zlib->rc = inflateReset2(&zlib->z, 0); - if (zlib->rc != Z_OK) - { - zlib_message(zlib, 1/*unexpected*/); - return 0; - } - - return 1; -} - -static int -zlib_init(struct zlib *zlib, struct IDAT *idat, struct chunk *chunk, - int window_bits, png_uint_32 offset) - /* Initialize a zlib_control; the result is true/false */ -{ - CLEAR(*zlib); - - zlib->idat = idat; - zlib->chunk = chunk; - zlib->file = chunk->file; - zlib->global = chunk->global; - zlib->rewrite_offset = offset; /* never changed for this zlib */ - - /* *_out does not need to be set: */ - zlib->z.next_in = Z_NULL; - zlib->z.avail_in = 0; - zlib->z.zalloc = Z_NULL; - zlib->z.zfree = Z_NULL; - zlib->z.opaque = Z_NULL; - - zlib->state = -1; - zlib->window_bits = window_bits; - - zlib->compressed_digits = 0; - zlib->uncompressed_digits = 0; - - /* These values are sticky across reset (in addition to the stuff in the - * first block, which is actually constant.) - */ - zlib->file_bits = 16; - zlib->ok_bits = 16; /* unset */ - zlib->cksum = 0; /* set when a checksum error is detected */ - - /* '0' means use the header; inflateInit2 should always succeed because it - * does nothing apart from allocating the internal zstate. - */ - zlib->rc = inflateInit2(&zlib->z, 0); - if (zlib->rc != Z_OK) - { - zlib_message(zlib, 1/*unexpected*/); - return 0; - } - - else - { - zlib->state = 0; /* initialized */ - return 1; - } -} - -static int -max_window_bits(uarbc size, int ndigits) - /* Return the zlib stream window bits required for data of the given size. */ -{ - png_uint_16 cb; - - if (ndigits > 1) - return 15; - - cb = size[0]; - - if (cb > 16384) return 15; - if (cb > 8192) return 14; - if (cb > 4096) return 13; - if (cb > 2048) return 12; - if (cb > 1024) return 11; - if (cb > 512) return 10; - if (cb > 256) return 9; - return 8; -} - -static int -zlib_advance(struct zlib *zlib, png_uint_32 nbytes) - /* Read nbytes compressed bytes; the stream will be initialized if required. - * Bytes are always being reread and errors are fatal. The return code is as - * follows: - * - * -1: saw the "too far back" error - * 0: ok, keep going - * 1: saw Z_STREAM_END (zlib->extra_bytes indicates too much data) - * 2: a zlib error that cannot be corrected (error message already - * output if required.) - */ -# define ZLIB_TOO_FAR_BACK (-1) -# define ZLIB_OK 0 -# define ZLIB_STREAM_END 1 -# define ZLIB_FATAL 2 -{ - int state = zlib->state; - int endrc = ZLIB_OK; - png_uint_32 in_bytes = 0; - struct file *file = zlib->file; - - assert(state >= 0); - - while (in_bytes < nbytes && endrc == ZLIB_OK) - { - png_uint_32 out_bytes; - int flush; - png_byte bIn = reread_byte(file); - png_byte bOut; - - switch (state) - { - case 0: /* first header byte */ - { - int file_bits = 8+(bIn >> 4); - int new_bits = zlib->window_bits; - - zlib->file_bits = file_bits; - - /* Check against the existing value - it may not need to be - * changed. - */ - if (new_bits == 0) /* no change */ - zlib->window_bits = file_bits; - - else if (new_bits != file_bits) /* rewrite required */ - bIn = (png_byte)((bIn & 0xf) + ((new_bits-8) << 4)); - } - - zlib->header[0] = bIn; - zlib->state = state = 1; - break; - - case 1: /* second header byte */ - { - int b2 = bIn & 0xe0; /* top 3 bits */ - - /* The checksum calculation, on the first 11 bits: */ - b2 += 0x1f - ((zlib->header[0] << 8) + b2) % 0x1f; - - /* Update the checksum byte if required: */ - if (bIn != b2) - { - /* If the first byte wasn't changed this indicates an error in - * the checksum calculation; signal this by setting file_bits - * (not window_bits) to 0. - */ - if (zlib->file_bits == zlib->window_bits) - zlib->cksum = 1; - - bIn = (png_byte)b2; - } - } - - zlib->header[1] = bIn; - zlib->state = state = 2; - break; - - default: /* After the header bytes */ - break; - } - - /* For some streams, perhaps only those compressed with 'superfast - * compression' (which results in a lot of copying) Z_BUF_ERROR can happen - * immediately after all output has been flushed on the next input byte. - * This is handled below when Z_BUF_ERROR is detected by adding an output - * byte. - */ - zlib->z.next_in = &bIn; - zlib->z.avail_in = 1; - zlib->z.next_out = &bOut; - zlib->z.avail_out = 0; /* Initially */ - - /* Initially use Z_NO_FLUSH in an attempt to persuade zlib to look at this - * byte without confusing what is going on with output. - */ - flush = Z_NO_FLUSH; - out_bytes = 0; - - /* NOTE: expression 3 is only evaluted on 'continue', because of the - * 'break' at the end of this loop below. - */ - for (;endrc == ZLIB_OK; - flush = Z_SYNC_FLUSH, - zlib->z.next_out = &bOut, - zlib->z.avail_out = 1, - ++out_bytes) - { - zlib->rc = inflate(&zlib->z, flush); - out_bytes -= zlib->z.avail_out; - - switch (zlib->rc) - { - case Z_BUF_ERROR: - if (zlib->z.avail_out == 0) - continue; /* Try another output byte. */ - - if (zlib->z.avail_in == 0) - break; /* Try another input byte */ - - /* Both avail_out and avail_in are 1 yet zlib returned a code - * indicating no progress was possible. This is unexpected. - */ - zlib_message(zlib, 1/*unexpected*/); - endrc = ZLIB_FATAL; /* stop processing */ - break; - - case Z_OK: - /* Zlib is supposed to have made progress: */ - assert(zlib->z.avail_out == 0 || zlib->z.avail_in == 0); - continue; - - case Z_STREAM_END: - /* This is the successful end. */ - zlib->state = 3; /* end of stream */ - endrc = ZLIB_STREAM_END; - break; - - case Z_NEED_DICT: - zlib_message(zlib, 0/*stream error*/); - endrc = ZLIB_FATAL; - break; - - case Z_DATA_ERROR: - /* The too far back error can be corrected, others cannot: */ - if (zlib->z.msg != NULL && - strcmp(zlib->z.msg, "invalid distance too far back") == 0) - { - endrc = ZLIB_TOO_FAR_BACK; - break; - } - /* FALL THROUGH */ - - default: - zlib_message(zlib, 0/*stream error*/); - endrc = ZLIB_FATAL; - break; - } /* switch (inflate rc) */ - - /* Control gets here when further output is not possible; endrc may - * still be ZLIB_OK if more input is required. - */ - break; - } /* for (output bytes) */ - - /* Keep a running count of output byte produced: */ - zlib->uncompressed_digits = uarb_add32(zlib->uncompressed_bytes, - zlib->uncompressed_digits, out_bytes); - - /* Keep going, the loop will terminate when endrc is no longer set to - * ZLIB_OK or all the input bytes have been consumed; meanwhile keep - * adding input bytes. - */ - assert(zlib->z.avail_in == 0 || endrc != ZLIB_OK); - - in_bytes += 1 - zlib->z.avail_in; - } /* while (input bytes) */ - - assert(in_bytes == nbytes || endrc != ZLIB_OK); - - /* Update the running total of input bytes consumed */ - zlib->compressed_digits = uarb_add32(zlib->compressed_bytes, - zlib->compressed_digits, in_bytes - zlib->z.avail_in); - - /* At the end of the stream update the chunk with the accumulated - * information if it is an improvement: - */ - if (endrc == ZLIB_STREAM_END && zlib->window_bits < zlib->ok_bits) - { - struct chunk *chunk = zlib->chunk; - - chunk->uncompressed_digits = uarb_copy(chunk->uncompressed_bytes, - zlib->uncompressed_bytes, zlib->uncompressed_digits); - chunk->compressed_digits = uarb_copy(chunk->compressed_bytes, - zlib->compressed_bytes, zlib->compressed_digits); - chunk->rewrite_buffer[0] = zlib->header[0]; - chunk->rewrite_buffer[1] = zlib->header[1]; - - if (zlib->window_bits != zlib->file_bits || zlib->cksum) - { - /* A rewrite is required */ - chunk->rewrite_offset = zlib->rewrite_offset; - chunk->rewrite_length = 2; - } - - else - { - chunk->rewrite_offset = 0; - chunk->rewrite_length = 0; - } - - if (in_bytes < nbytes) - chunk_message(chunk, "extra compressed data"); - - zlib->extra_bytes = nbytes - in_bytes; - zlib->ok_bits = zlib->window_bits; - } - - return endrc; -} - -static int -zlib_run(struct zlib *zlib) - /* Like zlib_advance but also handles a stream of IDAT chunks. */ -{ - /* The 'extra_bytes' field is set by zlib_advance if there is extra - * compressed data in the chunk it handles (if it sees Z_STREAM_END before - * all the input data has been used.) This function uses the value to update - * the correct chunk length, so the problem should only ever be detected once - * for each chunk. zlib_advance outputs the error message, though see the - * IDAT specific check below. - */ - zlib->extra_bytes = 0; - - if (zlib->idat != NULL) - { - struct IDAT_list *list = zlib->idat->idat_list_head; - struct IDAT_list *last = zlib->idat->idat_list_tail; - int skip = 0; - - /* 'rewrite_offset' is the offset of the LZ data within the chunk, for - * IDAT it should be 0: - */ - assert(zlib->rewrite_offset == 0); - - /* Process each IDAT_list in turn; the caller has left the stream - * positioned at the start of the first IDAT chunk data. - */ - for (;;) - { - const unsigned int count = list->count; - unsigned int i; - - for (i = 0; i<count; ++i) - { - int rc; - - if (skip > 0) /* Skip CRC and next IDAT header */ - skip_12(zlib->file); - - skip = 12; /* for the next time */ - - rc = zlib_advance(zlib, list->lengths[i]); - - switch (rc) - { - case ZLIB_OK: /* keep going */ - break; - - case ZLIB_STREAM_END: /* stop */ - /* There may be extra chunks; if there are and one of them is - * not zero length output the 'extra data' message. Only do - * this check if errors are being output. - */ - if (zlib->global->errors && zlib->extra_bytes == 0) - { - struct IDAT_list *check = list; - int j = i+1, jcount = count; - - for (;;) - { - for (; j<jcount; ++j) - if (check->lengths[j] > 0) - { - chunk_message(zlib->chunk, - "extra compressed data"); - goto end_check; - } - - if (check == last) - break; - - check = check->next; - jcount = check->count; - j = 0; - } - } - - end_check: - /* Terminate the list at the current position, reducing the - * length of the last IDAT too if required. - */ - list->lengths[i] -= zlib->extra_bytes; - list->count = i+1; - zlib->idat->idat_list_tail = list; - /* FALL THROUGH */ - - default: - return rc; - } - } - - /* At the end of the compressed data and Z_STREAM_END was not seen. */ - if (list == last) - return ZLIB_OK; - - list = list->next; - } - } - - else - { - struct chunk *chunk = zlib->chunk; - int rc; - - assert(zlib->rewrite_offset < chunk->chunk_length); - - rc = zlib_advance(zlib, chunk->chunk_length - zlib->rewrite_offset); - - /* The extra bytes in the chunk are handled now by adjusting the chunk - * length to exclude them; the zlib data is always stored at the end of - * the PNG chunk (although clearly this is not necessary.) zlib_advance - * has already output a warning message. - */ - chunk->chunk_length -= zlib->extra_bytes; - return rc; - } -} - -static int /* global function; not a member function */ -zlib_check(struct file *file, png_uint_32 offset) - /* Check the stream of zlib compressed data in either idat (if given) or (if - * not) chunk. In fact it is zlib_run that handles the difference in reading - * a single chunk and a list of IDAT chunks. - * - * In either case the input file must be positioned at the first byte of zlib - * compressed data (the first header byte). - * - * The return value is true on success, including the case where the zlib - * header may need to be rewritten, and false on an unrecoverable error. - * - * In the case of IDAT chunks 'offset' should be 0. - */ -{ - fpos_t start_pos; - struct zlib zlib; - - /* Record the start of the LZ data to allow a re-read. */ - file_getpos(file, &start_pos); - - /* First test the existing (file) window bits: */ - if (zlib_init(&zlib, file->idat, file->chunk, 0/*window bits*/, offset)) - { - int min_bits, max_bits, rc; - - /* The first run using the existing window bits. */ - rc = zlib_run(&zlib); - - switch (rc) - { - case ZLIB_TOO_FAR_BACK: - /* too far back error */ - file->status_code |= TOO_FAR_BACK; - min_bits = zlib.window_bits + 1; - max_bits = 15; - break; - - case ZLIB_STREAM_END: - if (!zlib.global->optimize_zlib && - zlib.window_bits == zlib.file_bits && !zlib.cksum) - { - /* The trivial case where the stream is ok and optimization was - * not requested. - */ - zlib_end(&zlib); - return 1; - } - - max_bits = max_window_bits(zlib.uncompressed_bytes, - zlib.uncompressed_digits); - if (zlib.ok_bits < max_bits) - max_bits = zlib.ok_bits; - min_bits = 8; - - /* cksum is set if there is an error in the zlib header checksum - * calculation in the original file (and this may be the only reason - * a rewrite is required). We can't rely on the file window bits in - * this case, so do the optimization anyway. - */ - if (zlib.cksum) - chunk_message(zlib.chunk, "zlib checkum"); - break; - - - case ZLIB_OK: - /* Truncated stream; unrecoverable, gets converted to ZLIB_FATAL */ - zlib.z.msg = PNGZ_MSG_CAST("[truncated]"); - zlib_message(&zlib, 0/*expected*/); - /* FALL THROUGH */ - - default: - /* Unrecoverable error; skip the chunk; a zlib_message has already - * been output. - */ - zlib_end(&zlib); - return 0; - } - - /* Optimize window bits or fix a too-far-back error. min_bits and - * max_bits have been set appropriately, ok_bits records the bit value - * known to work. - */ - while (min_bits < max_bits || max_bits < zlib.ok_bits/*if 16*/) - { - int test_bits = (min_bits + max_bits) >> 1; - - if (zlib_reset(&zlib, test_bits)) - { - file_setpos(file, &start_pos); - rc = zlib_run(&zlib); - - switch (rc) - { - case ZLIB_TOO_FAR_BACK: - min_bits = test_bits+1; - if (min_bits > max_bits) - { - /* This happens when the stream really is damaged and it - * contains a distance code that addresses bytes before - * the start of the uncompressed data. - */ - assert(test_bits == 15); - - /* Output the error that wasn't output before: */ - if (zlib.z.msg == NULL) - zlib.z.msg = PNGZ_MSG_CAST( - "invalid distance too far back"); - zlib_message(&zlib, 0/*stream error*/); - zlib_end(&zlib); - return 0; - } - break; - - case ZLIB_STREAM_END: /* success */ - max_bits = test_bits; - break; - - default: - /* A fatal error; this happens if a too-far-back error was - * hiding a more serious error, zlib_advance has already - * output a zlib_message. - */ - zlib_end(&zlib); - return 0; - } - } - - else /* inflateReset2 failed */ - { - zlib_end(&zlib); - return 0; - } - } - - /* The loop guarantees this */ - assert(zlib.ok_bits == max_bits); - zlib_end(&zlib); - return 1; - } - - else /* zlib initialization failed - skip the chunk */ - { - zlib_end(&zlib); - return 0; - } -} - -/***************************** LIBPNG CALLBACKS *******************************/ -/* The strategy here is to run a regular libpng PNG file read but examine the - * input data (from the file) before passing it to libpng so as to be aware of - * the state we expect libpng to be in. Warning and error callbacks are also - * intercepted so that they can be quieted and interpreted. Interpretation - * depends on a somewhat risky string match for known error messages; let us - * hope that this can be fixed in the next version of libpng. - * - * The control structure is pointed to by the libpng error pointer. It contains - * that set of structures which must persist across multiple read callbacks, - * which is pretty much everything except the 'zlib' control structure. - * - * The file structure is instantiated in the caller of the per-file routine, but - * the per-file routine contains the chunk and IDAT control structures. - */ -/* The three routines read_chunk, process_chunk and sync_stream can only be - * called via a call to read_chunk and only exit at a return from process_chunk. - * These routines could have been written as one confusing large routine, - * instead this code relies on the compiler to do tail call elimination. The - * possible calls are as follows: - * - * read_chunk - * -> sync_stream - * -> process_chunk - * -> process_chunk - * -> read_chunk - * returns - */ -static void read_chunk(struct file *file); -static void -process_chunk(struct file *file, png_uint_32 file_crc, png_uint_32 next_length, - png_uint_32 next_type) - /* Called when the chunk data has been read, next_length and next_type - * will be set for the next chunk (or 0 if this is IEND). - * - * When this routine returns, chunk_length and chunk_type will be set for the - * next chunk to write because if a chunk is skipped this return calls back - * to read_chunk. - */ -{ - const png_uint_32 type = file->type; - - if (file->global->verbose > 1) - { - fputs(" ", stderr); - type_name(file->type, stderr); - fprintf(stderr, " %lu 0x%.8x 0x%.8x\n", (unsigned long)file->length, - file->crc ^ 0xffffffff, file_crc); - } - - /* The basic structure seems correct but the CRC may not match, in this - * case assume that it is simply a bad CRC, either wrongly calculated or - * because of damaged stream data. - */ - if ((file->crc ^ 0xffffffff) != file_crc) - { - /* The behavior is set by the 'skip' setting; if it is anything other - * than SKIP_BAD_CRC ignore the bad CRC and return the chunk, with a - * corrected CRC and possibly processed, to libpng. Otherwise skip the - * chunk, which will result in a fatal error if the chunk is critical. - */ - file->status_code |= CRC_ERROR; - - /* Ignore the bad CRC */ - if (file->global->skip != SKIP_BAD_CRC) - type_message(file, type, "bad CRC"); - - /* This will cause an IEND with a bad CRC to stop */ - else if (CRITICAL(type)) - stop(file, READ_ERROR_CODE, "bad CRC in critical chunk"); - - else - { - type_message(file, type, "skipped: bad CRC"); - - /* NOTE: this cannot be reached for IEND because it is critical. */ - goto skip_chunk; - } - } - - /* Check for other 'skip' cases and handle these; these only apply to - * ancillary chunks (and not tRNS, which should probably have been a critical - * chunk.) - */ - if (skip_chunk_type(file->global, type)) - goto skip_chunk; - - /* The chunk may still be skipped if problems are detected in the LZ data, - * however the LZ data check requires a chunk. Handle this by instantiating - * a chunk unless an IDAT is already instantiated (IDAT control structures - * instantiate their own chunk.) - */ - if (type != png_IDAT) - file->alloc(file, 0/*chunk*/); - - else if (file->idat == NULL) - file->alloc(file, 1/*IDAT*/); - - else - { - /* The chunk length must be updated for process_IDAT */ - assert(file->chunk != NULL); - assert(file->chunk->chunk_type == png_IDAT); - file->chunk->chunk_length = file->length; - } - - /* Record the 'next' information too, now that the original values for - * this chunk have been copied. Notice that the IDAT chunks only make a - * copy of the position of the first chunk, this is fine - process_IDAT does - * not need the position of this chunk. - */ - file->length = next_length; - file->type = next_type; - getpos(file); - - /* Do per-type processing, note that if this code does not return from the - * function the chunk will be skipped. The rewrite is cancelled here so that - * it can be set in the per-chunk processing. - */ - file->chunk->rewrite_length = 0; - file->chunk->rewrite_offset = 0; - switch (type) - { - default: - return; - - case png_IHDR: - /* Read this now and update the control structure with the information - * it contains. The header is validated completely to ensure this is a - * PNG. - */ - { - struct chunk *chunk = file->chunk; - - if (chunk->chunk_length != 13) - stop_invalid(file, "IHDR length"); - - /* Read all the IHDR information and validate it. */ - setpos(chunk); - file->width = reread_4(file); - file->height = reread_4(file); - file->bit_depth = reread_byte(file); - file->color_type = reread_byte(file); - file->compression_method = reread_byte(file); - file->filter_method = reread_byte(file); - file->interlace_method = reread_byte(file); - - /* This validates all the fields, and calls stop_invalid if - * there is a problem. - */ - calc_image_size(file); - } - return; - - /* Ancillary chunks that require further processing: */ - case png_zTXt: case png_iCCP: - if (process_zTXt_iCCP(file)) - return; - chunk_end(&file->chunk); - file_setpos(file, &file->data_pos); - break; - - case png_iTXt: - if (process_iTXt(file)) - return; - chunk_end(&file->chunk); - file_setpos(file, &file->data_pos); - break; - - case png_IDAT: - if (process_IDAT(file)) - return; - /* First pass: */ - assert(next_type == png_IDAT); - break; - } - - /* Control reaches this point if the chunk must be skipped. For chunks other - * than IDAT this means that the zlib compressed data is fatally damanged and - * the chunk will not be passed to libpng. For IDAT it means that the end of - * the IDAT stream has not yet been reached and we must handle the next - * (IDAT) chunk. If the LZ data in an IDAT stream cannot be read 'stop' must - * be used to halt parsing of the PNG. - */ - read_chunk(file); - return; - - /* This is the generic code to skip the current chunk; simply jump to the - * next one. - */ -skip_chunk: - file->length = next_length; - file->type = next_type; - getpos(file); - read_chunk(file); -} - -static png_uint_32 -get32(png_bytep buffer, int offset) - /* Read a 32-bit value from an 8-byte circular buffer (used only below). - */ -{ - return - (buffer[ offset & 7] << 24) + - (buffer[(offset+1) & 7] << 16) + - (buffer[(offset+2) & 7] << 8) + - (buffer[(offset+3) & 7] ); -} - -static void -sync_stream(struct file *file) - /* The stream seems to be messed up, attempt to resync from the current chunk - * header. Executes stop on a fatal error, otherwise calls process_chunk. - */ -{ - png_uint_32 file_crc; - - file->status_code |= STREAM_ERROR; - - if (file->global->verbose) - { - fputs(" SYNC ", stderr); - type_name(file->type, stderr); - putc('\n', stderr); - } - - /* Return to the start of the chunk data */ - file_setpos(file, &file->data_pos); - file->read_count = 8; - - if (read_4(file, &file_crc) == 4) /* else completely truncated */ - { - /* Ignore the recorded chunk length, proceed through the data looking for - * a leading sequence of bytes that match the CRC in the following four - * bytes. Each time a match is found check the next 8 bytes for a valid - * length, chunk-type pair. - */ - png_uint_32 length; - png_uint_32 type = file->type; - png_uint_32 crc = crc_init_4(type); - png_byte buffer[8]; - unsigned int nread = 0, nused = 0; - - for (length=0; length <= 0x7fffffff; ++length) - { - int ch; - - if ((crc ^ 0xffffffff) == file_crc) - { - /* A match on the CRC; for IEND this is sufficient, but for anything - * else expect a following chunk header. - */ - if (type == png_IEND) - { - file->length = length; - process_chunk(file, file_crc, 0, 0); - return; - } - - else - { - /* Need 8 bytes */ - while (nread < 8+nused) - { - ch = read_byte(file); - if (ch == EOF) - goto truncated; - buffer[(nread++) & 7] = (png_byte)ch; - } - - /* Prevent overflow */ - nread -= nused & ~7; - nused -= nused & ~7; /* or, nused &= 7 ;-) */ - - /* Examine the 8 bytes for a valid chunk header. */ - { - png_uint_32 next_length = get32(buffer, nused); - - if (next_length < 0x7fffffff) - { - png_uint_32 next_type = get32(buffer, nused+4); - - if (chunk_type_valid(next_type)) - { - file->read_count -= 8; - process_chunk(file, file_crc, next_length, next_type); - return; - } - } - - /* Not valid, keep going. */ - } - } - } - - /* This catches up with the circular buffer which gets filled above - * while checking a chunk header. This code is slightly tricky - if - * the chunk_type is IEND the buffer will never be used, if it is not - * the code will always read ahead exactly 8 bytes and pass this on to - * process_chunk. So the invariant that IEND leaves the file position - * after the IEND CRC and other chunk leave it after the *next* chunk - * header is not broken. - */ - if (nread <= nused) - { - ch = read_byte(file); - - if (ch == EOF) - goto truncated; - } - - else - ch = buffer[(++nused) & 7]; - - crc = crc_one_byte(crc, file_crc >> 24); - file_crc = (file_crc << 8) + ch; - } - - /* Control gets to here if when 0x7fffffff bytes (plus 8) have been read, - * ok, treat this as a damaged stream too: - */ - } - -truncated: - stop(file, READ_ERROR_CODE, "damaged PNG stream"); -} - -static void -read_chunk(struct file *file) - /* On entry file::data_pos must be set to the position of the first byte - * of the chunk data *and* the input file must be at this position. This - * routine (via process_chunk) instantiates a chunk or IDAT control structure - * based on file::length and file::type and also resets these fields and - * file::data_pos for the chunk after this one. For an IDAT chunk the whole - * stream of IDATs will be read, until something other than an IDAT is - * encountered, and the file fields will be set for the chunk after the end - * of the stream of IDATs. - * - * For IEND the file::type field will be set to 0, and nothing beyond the end - * of the IEND chunk will have been read. - */ -{ - png_uint_32 length = file->length; - png_uint_32 type = file->type; - - /* After IEND file::type is set to 0, if libpng attempts to read - * more data at this point this is a bug in libpng. - */ - if (type == 0) - stop(file, UNEXPECTED_ERROR_CODE, "read beyond IEND"); - - if (file->global->verbose > 2) - { - fputs(" ", stderr); - type_name(type, stderr); - fprintf(stderr, " %lu\n", (unsigned long)length); - } - - /* Start the read_crc calculation with the chunk type, then read to the end - * of the chunk data (without processing it in any way) to check that it is - * all there and calculate the CRC. - */ - file->crc = crc_init_4(type); - if (crc_read_many(file, length)) /* else it was truncated */ - { - png_uint_32 file_crc; /* CRC read from file */ - unsigned int nread = read_4(file, &file_crc); - - if (nread == 4) - { - if (type != png_IEND) /* do not read beyond IEND */ - { - png_uint_32 next_length; - - nread += read_4(file, &next_length); - if (nread == 8 && next_length <= 0x7fffffff) - { - png_uint_32 next_type; - - nread += read_4(file, &next_type); - - if (nread == 12 && chunk_type_valid(next_type)) - { - /* Adjust the read count back to the correct value for this - * chunk. - */ - file->read_count -= 8; - process_chunk(file, file_crc, next_length, next_type); - return; - } - } - } - - else /* IEND */ - { - process_chunk(file, file_crc, 0, 0); - return; - } - } - } - - /* Control gets to here if the the stream seems invalid or damaged in some - * way. Either there was a problem reading all the expected data (this - * chunk's data, its CRC and the length and type of the next chunk) or the - * next chunk length/type are invalid. Notice that the cases that end up - * here all correspond to cases that would otherwise terminate the read of - * the PNG file. - */ - sync_stream(file); -} - -/* This returns a file* from a png_struct in an implementation specific way. */ -static struct file *get_control(png_const_structrp png_ptr); - -static void PNGCBAPI -error_handler(png_structp png_ptr, png_const_charp message) -{ - stop(get_control(png_ptr), LIBPNG_ERROR_CODE, message); -} - -static void PNGCBAPI -warning_handler(png_structp png_ptr, png_const_charp message) -{ - struct file *file = get_control(png_ptr); - - if (file->global->warnings) - emit_error(file, LIBPNG_WARNING_CODE, message); -} - -/* Read callback - this is where the work gets done to check the stream before - * passing it to libpng - */ -static void PNGCBAPI -read_callback(png_structp png_ptr, png_bytep buffer, size_t count) - /* Return 'count' bytes to libpng in 'buffer' */ -{ - struct file *file = get_control(png_ptr); - png_uint_32 type, length; /* For the chunk be *WRITTEN* */ - struct chunk *chunk; - - /* libpng should always ask for at least one byte */ - if (count == 0) - stop(file, UNEXPECTED_ERROR_CODE, "read callback for 0 bytes"); - - /* The callback always reads ahead by 8 bytes - the signature or chunk header - * - these bytes are stored in chunk_length and chunk_type. This block is - * executed once for the signature and once for the first chunk right at the - * start. - */ - if (file->read_count < 8) - { - assert(file->read_count == 0); - assert((file->status_code & TRUNCATED) == 0); - - (void)read_4(file, &file->length); - - if (file->read_count == 4) - (void)read_4(file, &file->type); - - if (file->read_count < 8) - { - assert((file->status_code & TRUNCATED) != 0); - stop(file, READ_ERROR_CODE, "not a PNG (too short)"); - } - - if (file->state == STATE_SIGNATURE) - { - if (file->length != sig1 || file->type != sig2) - stop(file, LIBPNG_ERROR_CODE, "not a PNG (signature)"); - - /* Else write it (this is the initialization of write_count, prior to - * this it contains CLEAR garbage.) - */ - file->write_count = 0; - } - - else - { - assert(file->state == STATE_CHUNKS); - - /* The first chunk must be a well formed IHDR (this could be relaxed to - * use the checks in process_chunk, but that seems unnecessary.) - */ - if (file->length != 13 || file->type != png_IHDR) - stop(file, LIBPNG_ERROR_CODE, "not a PNG (IHDR)"); - - /* The position of the data must be stored too */ - getpos(file); - } - } - - /* Retrieve previous state (because the read callbacks are made pretty much - * byte-by-byte in the sequential reader prior to 1.7). - */ - chunk = file->chunk; - - if (chunk != NULL) - { - length = chunk->chunk_length; - type = chunk->chunk_type; - } - - else - { - /* This is the signature case; for IDAT and other chunks these values will - * be overwritten when read_chunk is called below. - */ - length = file->length; - type = file->type; - } - - do - { - png_uint_32 b; - - /* Complete the read of a chunk; as a side effect this also instantiates - * a chunk control structure and sets the file length/type/data_pos fields - * for the *NEXT* chunk header. - * - * NOTE: at an IDAT any following IDAT chunks will also be read and the - * next_ fields will refer to the chunk after the last IDAT. - * - * NOTE: read_chunk only returns when it has read a chunk that must now be - * written. - */ - if (file->state != STATE_SIGNATURE && chunk == NULL) - { - assert(file->read_count == 8); - assert(file->idat == NULL); - read_chunk(file); - chunk = file->chunk; - assert(chunk != NULL); - - /* Do the initialization that was not done before. */ - length = chunk->chunk_length; - type = chunk->chunk_type; - - /* And start writing the new chunk. */ - file->write_count = 0; - } - - /* The chunk_ fields describe a chunk that must be written, or hold the - * signature. Write the header first. In the signature case this - * rewrites the signature. - */ - switch (file->write_count) - { - case 0: b = length >> 24; break; - case 1: b = length >> 16; break; - case 2: b = length >> 8; break; - case 3: b = length ; break; - - case 4: b = type >> 24; break; - case 5: b = type >> 16; break; - case 6: b = type >> 8; break; - case 7: b = type ; break; - - case 8: - /* The header has been written. If this is really the signature - * that's all that is required and we can go to normal chunk - * processing. - */ - if (file->state == STATE_SIGNATURE) - { - /* The signature has been written, the tail call to read_callback - * below (it's just a goto to the start with a decent compiler) - * will read the IHDR header ahead and validate it. - */ - assert(length == sig1 && type == sig2); - file->read_count = 0; /* Forces a header read */ - file->state = STATE_CHUNKS; /* IHDR: checked above */ - read_callback(png_ptr, buffer, count); - return; - } - - else - { - assert(chunk != NULL); - - /* Set up for write, notice that repositioning the input stream - * is only necessary if something is to be read from it. Also - * notice that for the IDAT stream this must only happen once - - * on the first IDAT - to get back to the start of the list and - * this is done inside process_IDAT: - */ - chunk->write_crc = crc_init_4(type); - if (file->state != STATE_IDAT && length > 0) - setpos(chunk); - } - /* FALL THROUGH */ - - default: - assert(chunk != NULL); - - /* NOTE: the arithmetic below overflows and gives a large positive - * png_uint_32 value until the whole chunk data has been written. - */ - switch (file->write_count - length) - { - /* Write the chunk data, normally this just comes from - * the file. The only exception is for that part of a - * chunk which is zlib data and which must be rewritten, - * and IDAT chunks which can be completely - * reconstructed. - */ - default: - if (file->state == STATE_IDAT) - { - struct IDAT *idat = file->idat; - - assert(idat != NULL); - - /* Read an IDAT byte from the input stream of IDAT chunks. - * Because the IDAT stream can be re-chunked this stream is - * held in the struct IDAT members. The chunk members, in - * particular chunk_length (and therefore the length local) - * refer to the output chunk. - */ - while (idat->idat_index >= idat->idat_length) - { - /* Advance one chunk */ - struct IDAT_list *cur = idat->idat_cur; - - assert(idat->idat_index == idat->idat_length); - assert(cur != NULL && cur->count > 0); - - /* NOTE: IDAT_list::count here, not IDAT_list::length */ - if (++(idat->idat_count) >= cur->count) - { - assert(idat->idat_count == cur->count); - - /* Move on to the next IDAT_list: */ - cur = cur->next; - - /* This is an internal error - read beyond the end of - * the pre-calculated stream. - */ - if (cur == NULL || cur->count == 0) - stop(file, UNEXPECTED_ERROR_CODE, - "read beyond end of IDAT"); - - idat->idat_count = 0; - idat->idat_cur = cur; - } - - idat->idat_index = 0; - /* Zero length IDAT chunks are permitted, so the length - * here may be 0. - */ - idat->idat_length = cur->lengths[idat->idat_count]; - - /* And skip 12 bytes to the next chunk data */ - skip_12(file); - } - - /* The index is always that of the next byte, the rest of - * the information is always the current IDAT chunk and the - * current list. - */ - ++(idat->idat_index); - } - - /* Read the byte from the stream. */ - b = reread_byte(file); - - /* If the byte must be rewritten handle that here */ - if (chunk->rewrite_length > 0) - { - if (chunk->rewrite_offset > 0) - --(chunk->rewrite_offset); - - else - { - b = chunk->rewrite_buffer[0]; - memmove(chunk->rewrite_buffer, chunk->rewrite_buffer+1, - (sizeof chunk->rewrite_buffer)- - (sizeof chunk->rewrite_buffer[0])); - - --(chunk->rewrite_length); - } - } - - chunk->write_crc = crc_one_byte(chunk->write_crc, b); - break; - - /* The CRC is written at: - * - * chunk_write == chunk_length+8..chunk_length+11 - * - * so 8 to 11. The CRC is not (yet) conditioned. - */ - case 8: b = chunk->write_crc >> 24; goto write_crc; - case 9: b = chunk->write_crc >> 16; goto write_crc; - case 10: b = chunk->write_crc >> 8; goto write_crc; - case 11: - /* This must happen before the chunk_end below: */ - b = chunk->write_crc; - - if (file->global->verbose > 2) - { - fputs(" ", stderr); - type_name(type, stderr); - fprintf(stderr, " %lu 0x%.8x\n", (unsigned long)length, - chunk->write_crc ^ 0xffffffff); - } - - /* The IDAT stream is written without a call to read_chunk - * until the end is reached. rechunk_length() calculates the - * length of the output chunks. Control gets to this point at - * the end of an *output* chunk - the length calculated by - * rechunk_length. If this corresponds to the end of the - * input stream stop writing IDAT chunks, otherwise continue. - */ - if (file->state == STATE_IDAT && - (file->idat->idat_index < file->idat->idat_length || - 1+file->idat->idat_count < file->idat->idat_cur->count || - file->idat->idat_cur != file->idat->idat_list_tail)) - { - /* Write another IDAT chunk. Call rechunk_length to - * calculate the length required. - */ - length = chunk->chunk_length = rechunk_length(file->idat); - assert(type == png_IDAT); - file->write_count = 0; /* for the new chunk */ - --(file->write_count); /* fake out the increment below */ - } - - else - { - /* Entered at the end of a non-IDAT chunk and at the end of - * the IDAT stream. The rewrite should have been cleared. - */ - if (chunk->rewrite_length > 0 || chunk->rewrite_offset > 0) - stop(file, UNEXPECTED_ERROR_CODE, "pending rewrite"); - - /* This is the last byte so reset chunk_read for the next - * chunk and move the input file to the position after the - * *next* chunk header if required. - */ - file->read_count = 8; - file_setpos(file, &file->data_pos); - - if (file->idat == NULL) - chunk_end(&file->chunk); - - else - IDAT_end(&file->idat); - } - - write_crc: - b ^= 0xff; /* conditioning */ - break; - } - break; - } - - /* Write one byte */ - b &= 0xff; - *buffer++ = (png_byte)b; - --count; - write_byte(file, (png_byte)b); /* increments chunk_write */ - } - while (count > 0); -} - -/* Bundle the file and an uninitialized chunk and IDAT control structure - * together to allow implementation of the chunk/IDAT allocate routine. - */ -struct control -{ - struct file file; - struct chunk chunk; - struct IDAT idat; -}; - -static int -control_end(struct control *control) -{ - return file_end(&control->file); -} - -static struct file * -get_control(png_const_structrp png_ptr) -{ - /* This just returns the (file*). The chunk and idat control structures - * don't always exist. - */ - struct control *control = png_voidcast(struct control*, - png_get_error_ptr(png_ptr)); - return &control->file; -} - -static void -allocate(struct file *file, int allocate_idat) -{ - struct control *control = png_voidcast(struct control*, file->alloc_ptr); - - if (allocate_idat) - { - assert(file->idat == NULL); - IDAT_init(&control->idat, file); - } - - else /* chunk */ - { - assert(file->chunk == NULL); - chunk_init(&control->chunk, file); - } -} - -static int -control_init(struct control *control, struct global *global, - const char *file_name, const char *out_name) - /* This wraps file_init(&control::file) and simply returns the result from - * file_init. - */ -{ - return file_init(&control->file, global, file_name, out_name, control, - allocate); -} - -static int -read_png(struct control *control) - /* Read a PNG, return 0 on success else an error (status) code; a bit mask as - * defined for file::status_code as above. - */ -{ - png_structp png_ptr; - png_infop info_ptr = NULL; - volatile png_bytep row = NULL, display = NULL; - volatile int rc; - - png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), control, - error_handler, warning_handler); - - if (png_ptr == NULL) - { - /* This is not really expected. */ - log_error(&control->file, LIBPNG_ERROR_CODE, "OOM allocating png_struct"); - control->file.status_code |= INTERNAL_ERROR; - return LIBPNG_ERROR_CODE; - } - - rc = setjmp(control->file.jmpbuf); - if (rc == 0) - { - png_set_read_fn(png_ptr, control, read_callback); - - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - png_error(png_ptr, "OOM allocating info structure"); - - if (control->file.global->verbose) - fprintf(stderr, " INFO\n"); - - png_read_info(png_ptr, info_ptr); - - { - png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); - - row = png_voidcast(png_byte*, malloc(rowbytes)); - display = png_voidcast(png_byte*, malloc(rowbytes)); - - if (row == NULL || display == NULL) - png_error(png_ptr, "OOM allocating row buffers"); - - { - png_uint_32 height = png_get_image_height(png_ptr, info_ptr); - int passes = png_set_interlace_handling(png_ptr); - int pass; - - png_start_read_image(png_ptr); - - for (pass = 0; pass < passes; ++pass) - { - png_uint_32 y = height; - - /* NOTE: this trashes the row each time; interlace handling won't - * work, but this avoids memory thrashing for speed testing. - */ - while (y-- > 0) - png_read_row(png_ptr, row, display); - } - } - } - - if (control->file.global->verbose) - fprintf(stderr, " END\n"); - - /* Make sure to read to the end of the file: */ - png_read_end(png_ptr, info_ptr); - } - - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - if (row != NULL) free(row); - if (display != NULL) free(display); - return rc; -} - -static int -one_file(struct global *global, const char *file_name, const char *out_name) -{ - int rc; - struct control control; - - if (global->verbose) - fprintf(stderr, "FILE %s -> %s\n", file_name, - out_name ? out_name : "<none>"); - - /* Although control_init can return a failure code the structure is always - * initialized, so control_end can be used to accumulate any status codes. - */ - rc = control_init(&control, global, file_name, out_name); - - if (rc == 0) - rc = read_png(&control); - - rc |= control_end(&control); - - return rc; -} - -static void -usage(const char *prog) -{ - /* ANSI C-90 limits strings to 509 characters, so use a string array: */ - size_t i; - static const char *usage_string[] = { -" Tests, optimizes and optionally fixes the zlib header in PNG files.", -" Optionally, when fixing, strips ancilliary chunks from the file.", -0, -"OPTIONS", -" OPERATION", -" By default files are just checked for readability with a summary of the", -" of zlib issues founds for each compressed chunk and the IDAT stream in", -" the file.", -" --optimize (-o):", -" Find the smallest deflate window size for the compressed data.", -" --strip=[none|crc|unsafe|unused|transform|color|all]:", -" none (default): Retain all chunks.", -" crc: Remove chunks with a bad CRC.", -" unsafe: Remove chunks that may be unsafe to retain if the image data", -" is modified. This is set automatically if --max is given but", -" may be cancelled by a later --strip=none.", -" unused: Remove chunks not used by libpng when decoding an image.", -" This retains any chunks that might be used by libpng image", -" transformations.", -" transform: unused+bKGD.", -" color: transform+iCCP and cHRM.", -" all: color+gAMA and sRGB.", -" Only ancillary chunks are ever removed. In addition the tRNS and sBIT", -" chunks are never removed as they affect exact interpretation of the", -" image pixel values. The following known chunks are treated specially", -" by the above options:", -" gAMA, sRGB [all]: These specify the gamma encoding used for the pixel", -" values.", -" cHRM, iCCP [color]: These specify how colors are encoded. iCCP also", -" specifies the exact encoding of a pixel value however in practice", -" most programs will ignore it.", -" bKGD [transform]: This is used by libpng transforms." -" --max=<number>:", -" Use IDAT chunks sized <number>. If no number is given the the IDAT", -" chunks will be the maximum size permitted; 2^31-1 bytes. If the option", -" is omitted the original chunk sizes will not be changed. When the", -" option is given --strip=unsafe is set automatically, this may be", -" cancelled if you know that all unknown unsafe-to-copy chunks really are", -" safe to copy across an IDAT size change. This is true of all chunks", -" that have ever been formally proposed as PNG extensions.", -" MESSAGES", -" By default the program only outputs summaries for each file.", -" --quiet (-q):", -" Do not output the summaries except for files which cannot be read. With", -" two --quiets these are not output either.", -" --errors (-e):", -" Output errors from libpng and the program (except too-far-back).", -" --warnings (-w):", -" Output warnings from libpng.", -" OUTPUT", -" By default nothing is written.", -" --out=<file>:", -" Write the optimized/corrected version of the next PNG to <file>. This", -" overrides the following two options", -" --suffix=<suffix>:", -" Set --out=<name><suffix> for all following files unless overridden on", -" a per-file basis by explicit --out.", -" --prefix=<prefix>:", -" Set --out=<prefix><name> for all the following files unless overridden", -" on a per-file basis by explicit --out.", -" These two options can be used together to produce a suffix and prefix.", -" INTERNAL OPTIONS", -#if 0 /*NYI*/ -#ifdef PNG_MAXIMUM_INFLATE_WINDOW -" --test:", -" Test the PNG_MAXIMUM_INFLATE_WINDOW option. Setting this disables", -" output as this would produce a broken file.", -#endif -#endif -0, -"EXIT CODES", -" *** SUBJECT TO CHANGE ***", -" The program exit code is value in the range 0..127 holding a bit mask of", -" the following codes. Notice that the results for each file are combined", -" together - check one file at a time to get a meaningful error code!", -" 0x01: The zlib too-far-back error existed in at least one chunk.", -" 0x02: At least once chunk had a CRC error.", -" 0x04: A chunk length was incorrect.", -" 0x08: The file was truncated.", -" Errors less than 16 are potentially recoverable, for a single file if the", -" exit code is less than 16 the file could be read (with corrections if a", -" non-zero code is returned).", -" 0x10: The file could not be read, even with corrections.", -" 0x20: The output file could not be written.", -" 0x40: An unexpected, potentially internal, error occured.", -" If the command line arguments are incorrect the program exits with exit", -" 255. Some older operating systems only support 7-bit exit codes, on those", -" systems it is suggested that this program is first tested by supplying", -" invalid arguments.", -0, -"DESCRIPTION", -" " PROGRAM_NAME ":", -" checks each PNG file on the command line for errors. By default errors are", -" not output and the program just returns an exit code and prints a summary.", -" With the --quiet (-q) option the summaries are suppressed too and the", -" program only outputs unexpected errors (internal errors and file open", -" errors).", -" Various known problems in PNG files are fixed while the file is being read", -" The exit code says what problems were fixed. In particular the zlib error:", -0, -" \"invalid distance too far back\"", -0, -" caused by an incorrect optimization of a zlib stream is fixed in any", -" compressed chunk in which it is encountered. An integrity problem of the", -" PNG stream caused by a bug in libpng which wrote an incorrect chunk length", -" is also fixed. Chunk CRC errors are automatically fixed up.", -0, -" Setting one of the \"OUTPUT\" options causes the possibly modified file to", -" be written to a new file.", -0, -" Notice that some PNG files with the zlib optimization problem can still be", -" read by libpng under some circumstances. This program will still detect", -" and, if requested, correct the error.", -0, -" The program will reliably process all files on the command line unless", -" either an invalid argument causes the usage message (this message) to be", -" produced or the program crashes.", -0, -" The summary lines describe issues encountered with the zlib compressed", -" stream of a chunk. They have the following format, which is SUBJECT TO", -" CHANGE in the future:", -0, -" chunk reason comp-level p1 p2 p3 p4 file", -0, -" p1 through p4 vary according to the 'reason'. There are always 8 space", -" separated fields. Reasons specific formats are:", -0, -" chunk ERR status code read-errno write-errno message file", -" chunk SKP comp-level file-bits zlib-rc compressed message file", -" chunk ??? comp-level file-bits ok-bits compressed uncompress file", -0, -" The various fields are", -0, -"$1 chunk: The chunk type of a chunk in the file or 'HEAD' if a problem", -" is reported by libpng at the start of the IDAT stream.", -"$2 reason: One of:", -" CHK: A zlib header checksum was detected and fixed.", -" TFB: The zlib too far back error was detected and fixed.", -" OK : No errors were detected in the zlib stream and optimization", -" was not requested, or was not possible.", -" OPT: The zlib stream window bits value could be improved (and was).", -" SKP: The chunk was skipped because of a zlib issue (zlib-rc) with", -" explanation 'message'", -" ERR: The read of the file was aborted. The parameters explain why.", -"$3 status: For 'ERR' the accumulate status code from 'EXIT CODES' above.", -" This is printed as a 2 digit hexadecimal value", -" comp-level: The recorded compression level (FLEVEL) of a zlib stream", -" expressed as a string {supfast,stdfast,default,maximum}", -"$4 code: The file exit code; where stop was called, as a fairly terse", -" string {warning,libpng,zlib,invalid,read,write,unexpected}.", -" file-bits: The zlib window bits recorded in the file.", -"$5 read-errno: A system errno value from a read translated by strerror(3).", -" zlib-rc: A zlib return code as a string (see zlib.h).", -" ok-bits: The smallest zlib window bits value that works.", -"$6 write-errno:A system errno value from a write translated by strerror(3).", -" compressed: The count of compressed bytes in the zlib stream, when the", -" reason is 'SKP'; this is a count of the bytes read from the", -" stream when the fatal error was encountered.", -"$7 message: An error message (spaces replaced by _, as in all parameters),", -" uncompress: The count of bytes from uncompressing the zlib stream; this", -" may not be the same as the number of bytes in the image.", -"$8 file: The name of the file (this may contain spaces).", -}; - - fprintf(stderr, "Usage: %s {[options] png-file}\n", prog); - - for (i=0; i < (sizeof usage_string)/(sizeof usage_string[0]); ++i) - { - if (usage_string[i] != 0) - fputs(usage_string[i], stderr); - - fputc('\n', stderr); - } - - exit(255); -} - -int -main(int argc, const char **argv) -{ - const char * prog = *argv; - const char * outfile = NULL; - const char * suffix = NULL; - const char * prefix = NULL; - int done = 0; /* if at least one file is processed */ - struct global global; - - global_init(&global); - - while (--argc > 0) - { - ++argv; - - if (strcmp(*argv, "--debug") == 0) - { - /* To help debugging problems: */ - global.errors = global.warnings = 1; - global.quiet = 0; - global.verbose = 7; - } - - else if (strncmp(*argv, "--max=", 6) == 0) - { - global.idat_max = (png_uint_32)atol(6+*argv); - - if (global.skip < SKIP_UNSAFE) - global.skip = SKIP_UNSAFE; - } - - else if (strcmp(*argv, "--max") == 0) - { - global.idat_max = 0x7fffffff; - - if (global.skip < SKIP_UNSAFE) - global.skip = SKIP_UNSAFE; - } - - else if (strcmp(*argv, "--optimize") == 0 || strcmp(*argv, "-o") == 0) - global.optimize_zlib = 1; - - else if (strncmp(*argv, "--out=", 6) == 0) - outfile = 6+*argv; - - else if (strncmp(*argv, "--suffix=", 9) == 0) - suffix = 9+*argv; - - else if (strncmp(*argv, "--prefix=", 9) == 0) - prefix = 9+*argv; - - else if (strcmp(*argv, "--strip=none") == 0) - global.skip = SKIP_NONE; - - else if (strcmp(*argv, "--strip=crc") == 0) - global.skip = SKIP_BAD_CRC; - - else if (strcmp(*argv, "--strip=unsafe") == 0) - global.skip = SKIP_UNSAFE; - - else if (strcmp(*argv, "--strip=unused") == 0) - global.skip = SKIP_UNUSED; - - else if (strcmp(*argv, "--strip=transform") == 0) - global.skip = SKIP_TRANSFORM; - - else if (strcmp(*argv, "--strip=color") == 0) - global.skip = SKIP_COLOR; - - else if (strcmp(*argv, "--strip=all") == 0) - global.skip = SKIP_ALL; - - else if (strcmp(*argv, "--errors") == 0 || strcmp(*argv, "-e") == 0) - global.errors = 1; - - else if (strcmp(*argv, "--warnings") == 0 || strcmp(*argv, "-w") == 0) - global.warnings = 1; - - else if (strcmp(*argv, "--quiet") == 0 || strcmp(*argv, "-q") == 0) - { - if (global.quiet) - global.quiet = 2; - - else - global.quiet = 1; - } - - else if (strcmp(*argv, "--verbose") == 0 || strcmp(*argv, "-v") == 0) - ++global.verbose; - -#if 0 - /* NYI */ -# ifdef PNG_MAXIMUM_INFLATE_WINDOW - else if (strcmp(*argv, "--test") == 0) - ++set_option; -# endif -#endif - - else if ((*argv)[0] == '-') - usage(prog); - - else - { - size_t outlen = strlen(*argv); - char temp_name[FILENAME_MAX+1]; - - if (outfile == NULL) /* else this takes precedence */ - { - /* Consider the prefix/suffix options */ - if (prefix != NULL) - { - size_t prefixlen = strlen(prefix); - - if (prefixlen+outlen > FILENAME_MAX) - { - fprintf(stderr, "%s: output file name too long: %s%s%s\n", - prog, prefix, *argv, suffix ? suffix : ""); - global.status_code |= WRITE_ERROR; - continue; - } - - memcpy(temp_name, prefix, prefixlen); - memcpy(temp_name+prefixlen, *argv, outlen); - outlen += prefixlen; - outfile = temp_name; - } - - else if (suffix != NULL) - memcpy(temp_name, *argv, outlen); - - temp_name[outlen] = 0; - - if (suffix != NULL) - { - size_t suffixlen = strlen(suffix); - - if (outlen+suffixlen > FILENAME_MAX) - { - fprintf(stderr, "%s: output file name too long: %s%s\n", - prog, *argv, suffix); - global.status_code |= WRITE_ERROR; - continue; - } - - memcpy(temp_name+outlen, suffix, suffixlen); - outlen += suffixlen; - temp_name[outlen] = 0; - outfile = temp_name; - } - } - - (void)one_file(&global, *argv, outfile); - ++done; - outfile = NULL; - } - } - - if (!done) - usage(prog); - - return global_end(&global); -} - -#else /* ZLIB_VERNUM < 0x1240 */ -int -main(void) -{ - fprintf(stderr, - "pngfix needs libpng with a zlib >=1.2.4 (not 0x%x)\n", - ZLIB_VERNUM); - return 77; -} -#endif /* ZLIB_VERNUM */ - -#else /* No read support */ - -int -main(void) -{ - fprintf(stderr, "pngfix does not work without read support\n"); - return 77; -} -#endif /* PNG_READ_SUPPORTED && PNG_EASY_ACCESS_SUPPORTED */ -#else /* No setjmp support */ -int -main(void) -{ - fprintf(stderr, "pngfix does not work without setjmp support\n"); - return 77; -} -#endif /* PNG_SETJMP_SUPPORTED */ - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/sRGB.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/sRGB.h deleted file mode 100644 index 22c8f7c0e3d..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/tools/sRGB.h +++ /dev/null @@ -1,48 +0,0 @@ -/*- - * sRGB.h - * - * Last changed in libpng 1.6.0 [February 14, 2013] - * - * COPYRIGHT: Written by John Cunningham Bowler, 2013. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Utility file; not actually a header, this contains definitions of sRGB - * calculation functions for inclusion in those test programs that need them. - * - * All routines take and return a floating point value in the range - * 0 to 1.0, doing a calculation according to the sRGB specification - * (in fact the source of the numbers is the wikipedia article at - * http://en.wikipedia.org/wiki/SRGB). - */ -static double -sRGB_from_linear(double l) -{ - if (l <= 0.0031308) - l *= 12.92; - - else - l = 1.055 * pow(l, 1/2.4) - 0.055; - - return l; -} - -static double -linear_from_sRGB(double s) -{ - if (s <= 0.04045) - return s / 12.92; - - else - return pow((s+0.055)/1.055, 2.4); -} - -static double -YfromRGB(double r, double g, double b) -{ - /* Use the sRGB (rounded) coefficients for Rlinear, Glinear, Blinear to get - * the CIE Y value (also linear). - */ - return 0.2126 * r + 0.7152 * g + 0.0722 * b; -} diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/PngFile.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/PngFile.c deleted file mode 100644 index e563e929274..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/PngFile.c +++ /dev/null @@ -1,451 +0,0 @@ -/*------------------------------------- - * PNGFILE.C -- Image File Functions - *------------------------------------- - * - * Copyright 2000, Willem van Schaik. - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -#include <windows.h> -#include <commdlg.h> -#include <stdio.h> -#include <stdlib.h> -#include <zlib.h> - -#include "png.h" -#include "pngfile.h" -#include "cexcept.h" - -define_exception_type(const char *); -extern struct exception_context the_exception_context[1]; -struct exception_context the_exception_context[1]; -png_const_charp msg; - -static OPENFILENAME ofn; - -static png_structp png_ptr = NULL; -static png_infop info_ptr = NULL; - - -/* cexcept interface */ - -static void -png_cexcept_error(png_structp png_ptr, png_const_charp msg) -{ - if(png_ptr) - ; -#ifdef PNG_CONSOLE_IO_SUPPORTED - fprintf(stderr, "libpng error: %s\n", msg); -#endif - { - Throw msg; - } -} - -/* Windows open-file functions */ - -void PngFileInitialize (HWND hwnd) -{ - static TCHAR szFilter[] = TEXT ("PNG Files (*.PNG)\0*.png\0") - TEXT ("All Files (*.*)\0*.*\0\0"); - - ofn.lStructSize = sizeof (OPENFILENAME); - ofn.hwndOwner = hwnd; - ofn.hInstance = NULL; - ofn.lpstrFilter = szFilter; - ofn.lpstrCustomFilter = NULL; - ofn.nMaxCustFilter = 0; - ofn.nFilterIndex = 0; - ofn.lpstrFile = NULL; /* Set in Open and Close functions */ - ofn.nMaxFile = MAX_PATH; - ofn.lpstrFileTitle = NULL; /* Set in Open and Close functions */ - ofn.nMaxFileTitle = MAX_PATH; - ofn.lpstrInitialDir = NULL; - ofn.lpstrTitle = NULL; - ofn.Flags = 0; /* Set in Open and Close functions */ - ofn.nFileOffset = 0; - ofn.nFileExtension = 0; - ofn.lpstrDefExt = TEXT ("png"); - ofn.lCustData = 0; - ofn.lpfnHook = NULL; - ofn.lpTemplateName = NULL; -} - -BOOL PngFileOpenDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) -{ - ofn.hwndOwner = hwnd; - ofn.lpstrFile = pstrFileName; - ofn.lpstrFileTitle = pstrTitleName; - ofn.Flags = OFN_HIDEREADONLY; - - return GetOpenFileName (&ofn); -} - -BOOL PngFileSaveDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) -{ - ofn.hwndOwner = hwnd; - ofn.lpstrFile = pstrFileName; - ofn.lpstrFileTitle = pstrTitleName; - ofn.Flags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT; - - return GetSaveFileName (&ofn); -} - -/* PNG image handler functions */ - -BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData, - int *piWidth, int *piHeight, int *piChannels, png_color *pBkgColor) -{ - static FILE *pfFile; - png_byte pbSig[8]; - int iBitDepth; - int iColorType; - double dGamma; - png_color_16 *pBackground; - png_uint_32 ulChannels; - png_uint_32 ulRowBytes; - png_byte *pbImageData = *ppbImageData; - static png_byte **ppbRowPointers = NULL; - int i; - - /* open the PNG input file */ - - if (!pstrFileName) - { - *ppbImageData = pbImageData = NULL; - return FALSE; - } - - if (!(pfFile = fopen(pstrFileName, "rb"))) - { - *ppbImageData = pbImageData = NULL; - return FALSE; - } - - /* first check the eight byte PNG signature */ - - fread(pbSig, 1, 8, pfFile); - if (png_sig_cmp(pbSig, 0, 8)) - { - *ppbImageData = pbImageData = NULL; - return FALSE; - } - - /* create the two png(-info) structures */ - - png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), NULL, - (png_error_ptr)png_cexcept_error, (png_error_ptr)NULL); - if (!png_ptr) - { - *ppbImageData = pbImageData = NULL; - return FALSE; - } - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_read_struct(&png_ptr, NULL, NULL); - *ppbImageData = pbImageData = NULL; - return FALSE; - } - - Try - { - - /* initialize the png structure */ - -#ifdef PNG_STDIO_SUPPORTED - png_init_io(png_ptr, pfFile); -#else - png_set_read_fn(png_ptr, (png_voidp)pfFile, png_read_data); -#endif - - png_set_sig_bytes(png_ptr, 8); - - /* read all PNG info up to image data */ - - png_read_info(png_ptr, info_ptr); - - /* get width, height, bit-depth and color-type */ - - png_get_IHDR(png_ptr, info_ptr, piWidth, piHeight, &iBitDepth, - &iColorType, NULL, NULL, NULL); - - /* expand images of all color-type and bit-depth to 3x8-bit RGB */ - /* let the library process alpha, transparency, background, etc. */ - -#ifdef PNG_READ_16_TO_8_SUPPORTED - if (iBitDepth == 16) -# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(png_ptr); -# else - png_set_strip_16(png_ptr); -# endif -#endif - if (iColorType == PNG_COLOR_TYPE_PALETTE) - png_set_expand(png_ptr); - if (iBitDepth < 8) - png_set_expand(png_ptr); - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand(png_ptr); - if (iColorType == PNG_COLOR_TYPE_GRAY || - iColorType == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); - - /* set the background color to draw transparent and alpha images over */ - if (png_get_bKGD(png_ptr, info_ptr, &pBackground)) - { - png_set_background(png_ptr, pBackground, PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); - pBkgColor->red = (byte) pBackground->red; - pBkgColor->green = (byte) pBackground->green; - pBkgColor->blue = (byte) pBackground->blue; - } - else - { - pBkgColor = NULL; - } - - /* if required set gamma conversion */ - if (png_get_gAMA(png_ptr, info_ptr, &dGamma)) - png_set_gamma(png_ptr, (double) 2.2, dGamma); - - /* after the transformations are registered, update info_ptr data */ - - png_read_update_info(png_ptr, info_ptr); - - /* get again width, height and the new bit-depth and color-type */ - - png_get_IHDR(png_ptr, info_ptr, piWidth, piHeight, &iBitDepth, - &iColorType, NULL, NULL, NULL); - - - /* row_bytes is the width x number of channels */ - - ulRowBytes = png_get_rowbytes(png_ptr, info_ptr); - ulChannels = png_get_channels(png_ptr, info_ptr); - - *piChannels = ulChannels; - - /* now we can allocate memory to store the image */ - - if (pbImageData) - { - free (pbImageData); - pbImageData = NULL; - } - if ((pbImageData = (png_byte *) malloc(ulRowBytes * (*piHeight) - * sizeof(png_byte))) == NULL) - { - png_error(png_ptr, "Visual PNG: out of memory"); - } - *ppbImageData = pbImageData; - - /* and allocate memory for an array of row-pointers */ - - if ((ppbRowPointers = (png_bytepp) malloc((*piHeight) - * sizeof(png_bytep))) == NULL) - { - png_error(png_ptr, "Visual PNG: out of memory"); - } - - /* set the individual row-pointers to point at the correct offsets */ - - for (i = 0; i < (*piHeight); i++) - ppbRowPointers[i] = pbImageData + i * ulRowBytes; - - /* now we can go ahead and just read the whole image */ - - png_read_image(png_ptr, ppbRowPointers); - - /* read the additional chunks in the PNG file (not really needed) */ - - png_read_end(png_ptr, NULL); - - /* and we're done */ - - free (ppbRowPointers); - ppbRowPointers = NULL; - - /* yepp, done */ - } - - Catch (msg) - { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - - *ppbImageData = pbImageData = NULL; - - if(ppbRowPointers) - free (ppbRowPointers); - - fclose(pfFile); - - return FALSE; - } - - fclose (pfFile); - - return TRUE; -} - - -BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData, - int iWidth, int iHeight, png_color bkgColor) -{ - const int ciBitDepth = 8; - const int ciChannels = 3; - - static FILE *pfFile; - png_uint_32 ulRowBytes; - static png_byte **ppbRowPointers = NULL; - int i; - - /* open the PNG output file */ - - if (!pstrFileName) - return FALSE; - - if (!(pfFile = fopen(pstrFileName, "wb"))) - return FALSE; - - /* prepare the standard PNG structures */ - - png_ptr = png_create_write_struct(png_get_libpng_ver(NULL), NULL, - (png_error_ptr)png_cexcept_error, (png_error_ptr)NULL); - if (!png_ptr) - { - fclose(pfFile); - return FALSE; - } - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) { - fclose(pfFile); - png_destroy_write_struct(&png_ptr, (png_infopp) NULL); - return FALSE; - } - - Try - { - /* initialize the png structure */ - -#ifdef PNG_STDIO_SUPPORTED - png_init_io(png_ptr, pfFile); -#else - png_set_write_fn(png_ptr, (png_voidp)pfFile, png_write_data, png_flush); -#endif - - /* we're going to write a very simple 3x8-bit RGB image */ - - png_set_IHDR(png_ptr, info_ptr, iWidth, iHeight, ciBitDepth, - PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, - PNG_FILTER_TYPE_BASE); - - /* write the file header information */ - - png_write_info(png_ptr, info_ptr); - - /* swap the BGR pixels in the DiData structure to RGB */ - - png_set_bgr(png_ptr); - - /* row_bytes is the width x number of channels */ - - ulRowBytes = iWidth * ciChannels; - - /* we can allocate memory for an array of row-pointers */ - - if ((ppbRowPointers = (png_bytepp) malloc(iHeight * sizeof(png_bytep))) == NULL) - Throw "Visualpng: Out of memory"; - - /* set the individual row-pointers to point at the correct offsets */ - - for (i = 0; i < iHeight; i++) - ppbRowPointers[i] = pDiData + i * (((ulRowBytes + 3) >> 2) << 2); - - /* write out the entire image data in one call */ - - png_write_image (png_ptr, ppbRowPointers); - - /* write the additional chunks to the PNG file (not really needed) */ - - png_write_end(png_ptr, info_ptr); - - /* and we're done */ - - free (ppbRowPointers); - ppbRowPointers = NULL; - - /* clean up after the write, and free any memory allocated */ - - png_destroy_write_struct(&png_ptr, (png_infopp) NULL); - - /* yepp, done */ - } - - Catch (msg) - { - png_destroy_write_struct(&png_ptr, (png_infopp) NULL); - - if(ppbRowPointers) - free (ppbRowPointers); - - fclose(pfFile); - - return FALSE; - } - - fclose (pfFile); - - return TRUE; -} - -#ifndef PNG_STDIO_SUPPORTED - -static void -png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - - /* fread() returns 0 on error, so it is OK to store this in a png_size_t - * instead of an int, which is what fread() actually returns. - */ - check = (png_size_t)fread(data, (png_size_t)1, length, - (FILE *)png_ptr->io_ptr); - - if (check != length) - { - png_error(png_ptr, "Read Error"); - } -} - -static void -png_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - - check = fwrite(data, 1, length, (FILE *)(png_ptr->io_ptr)); - if (check != length) - { - png_error(png_ptr, "Write Error"); - } -} - -static void -png_flush(png_structp png_ptr) -{ - FILE *io_ptr; - io_ptr = (FILE *)CVT_PTR((png_ptr->io_ptr)); - if (io_ptr != NULL) - fflush(io_ptr); -} - -#endif - -/*----------------- - * end of source - *----------------- - */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/PngFile.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/PngFile.h deleted file mode 100644 index 474426c22ea..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/PngFile.h +++ /dev/null @@ -1,30 +0,0 @@ -/*------------------------------------------*/ -/* PNGFILE.H -- Header File for pngfile.c*/ -/*------------------------------------------*/ - -/* Copyright 2000, Willem van Schaik.*/ - -/* This code is released under the libpng license.*/ -/* For conditions of distribution and use, see the disclaimer*/ -/* and license in png.h*/ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <windows.h> - -void PngFileInitialize (HWND hwnd) ; -BOOL PngFileOpenDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) ; -BOOL PngFileSaveDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) ; - -BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData, - int *piWidth, int *piHeight, int *piChannels, png_color *pBkgColor); -BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData, - int iWidth, int iHeight, png_color BkgColor); - -#ifndef PNG_STDIO_SUPPORTED -static void png_read_data(png_structp png_ptr, png_bytep data, png_size_t length); -static void png_write_data(png_structp png_ptr, png_bytep data, png_size_t length); -static void png_flush(png_structp png_ptr); -#endif - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/README.txt b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/README.txt deleted file mode 100644 index 72c5cba1790..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/README.txt +++ /dev/null @@ -1,61 +0,0 @@ -Microsoft Developer Studio Build File, Format Version 6.00 for VisualPng ------------------------------------------------------------------------- - -Copyright 2000, Willem van Schaik. - -This code is released under the libpng license. -For conditions of distribution and use, see the disclaimer -and license in png.h - -As a PNG .dll demo VisualPng is finished. More features would only hinder -the program's objective. However, further extensions (like support for other -graphics formats) are in development. To get these, or for pre-compiled -binaries, go to "http://www.schaik.com/png/visualpng.html". - ------------------------------------------------------------------------- - -Assumes that - - libpng DLLs and LIBs are in ..\..\projects\msvc\win32\libpng - zlib DLLs and LIBs are in ..\..\projects\msvc\win32\zlib - libpng header files are in ..\..\..\libpng - zlib header files are in ..\..\..\zlib - the pngsuite images are in ..\pngsuite - -To build: - -1) On the main menu Select "Build|Set Active configuration". - Choose the configuration that corresponds to the library you want to test. - This library must have been built using the libpng MS project located in - the "..\..\mscv" subdirectory. - -2) Select "Build|Clean" - -3) Select "Build|Rebuild All" - -4) After compiling and linking VisualPng will be started to view an image - from the PngSuite directory. Press Ctrl-N (and Ctrl-V) for other images. - - -To install: - -When distributing VisualPng (or a further development) the following options -are available: - -1) Build the program with the configuration "Win32 LIB" and you only need to - include the executable from the ./lib directory in your distribution. - -2) Build the program with the configuration "Win32 DLL" and you need to put - in your distribution the executable from the ./dll directory and the dll's - libpng1.dll, zlib.dll and msvcrt.dll. These need to be in the user's PATH. - - -Willem van Schaik -Calgary, June 6th 2000 - -P.S. VisualPng was written based on preliminary work of: - - - Simon-Pierre Cadieux - - Glenn Randers-Pehrson - - Greg Roelofs - diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.c b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.c deleted file mode 100644 index 236525a59fe..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.c +++ /dev/null @@ -1,970 +0,0 @@ -/*------------------------------------ - * VisualPng.C -- Shows a PNG image - *------------------------------------ - * - * Copyright 2000, Willem van Schaik. - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -/* switches */ - -/* defines */ - -#define PROGNAME "VisualPng" -#define LONGNAME "Win32 Viewer for PNG-files" -#define VERSION "1.0 of 2000 June 07" - -/* constants */ - -#define MARGIN 8 - -/* standard includes */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <windows.h> -#include <zlib.h> - -/* application includes */ - -#include "png.h" -#include "pngfile.h" -#include "resource.h" - -/* macros */ - -/* function prototypes */ - -LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM); -BOOL CALLBACK AboutDlgProc (HWND, UINT, WPARAM, LPARAM) ; - -BOOL CenterAbout (HWND hwndChild, HWND hwndParent); - -BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, - int *pFileIndex); - -BOOL SearchPngList (TCHAR *pFileList, int FileCount, int *pFileIndex, - PTSTR pstrPrevName, PTSTR pstrNextName); - -BOOL LoadImageFile(HWND hwnd, PTSTR pstrPathName, - png_byte **ppbImage, int *pxImgSize, int *pyImgSize, int *piChannels, - png_color *pBkgColor); - -BOOL DisplayImage (HWND hwnd, BYTE **ppDib, - BYTE **ppDiData, int cxWinSize, int cyWinSize, - BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels, - BOOL bStretched); - -BOOL InitBitmap ( - BYTE *pDiData, int cxWinSize, int cyWinSize); - -BOOL FillBitmap ( - BYTE *pDiData, int cxWinSize, int cyWinSize, - BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels, - BOOL bStretched); - -/* a few global variables */ - -static char *szProgName = PROGNAME; -static char *szAppName = LONGNAME; -static char *szIconName = PROGNAME; -static char szCmdFileName [MAX_PATH]; - -/* MAIN routine */ - -int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, - PSTR szCmdLine, int iCmdShow) -{ - HACCEL hAccel; - HWND hwnd; - MSG msg; - WNDCLASS wndclass; - int ixBorders, iyBorders; - - wndclass.style = CS_HREDRAW | CS_VREDRAW; - wndclass.lpfnWndProc = WndProc; - wndclass.cbClsExtra = 0; - wndclass.cbWndExtra = 0; - wndclass.hInstance = hInstance; - wndclass.hIcon = LoadIcon (hInstance, szIconName) ; - wndclass.hCursor = LoadCursor (NULL, IDC_ARROW); - wndclass.hbrBackground = NULL; /* (HBRUSH) GetStockObject (GRAY_BRUSH); */ - wndclass.lpszMenuName = szProgName; - wndclass.lpszClassName = szProgName; - - if (!RegisterClass (&wndclass)) - { - MessageBox (NULL, TEXT ("Error: this program requires Windows NT!"), - szProgName, MB_ICONERROR); - return 0; - } - - /* if filename given on commandline, store it */ - if ((szCmdLine != NULL) && (*szCmdLine != '\0')) - if (szCmdLine[0] == '"') - strncpy (szCmdFileName, szCmdLine + 1, strlen(szCmdLine) - 2); - else - strcpy (szCmdFileName, szCmdLine); - else - strcpy (szCmdFileName, ""); - - /* calculate size of window-borders */ - ixBorders = 2 * (GetSystemMetrics (SM_CXBORDER) + - GetSystemMetrics (SM_CXDLGFRAME)); - iyBorders = 2 * (GetSystemMetrics (SM_CYBORDER) + - GetSystemMetrics (SM_CYDLGFRAME)) + - GetSystemMetrics (SM_CYCAPTION) + - GetSystemMetrics (SM_CYMENUSIZE) + - 1; /* WvS: don't ask me why? */ - - hwnd = CreateWindow (szProgName, szAppName, - WS_OVERLAPPEDWINDOW, - CW_USEDEFAULT, CW_USEDEFAULT, - 512 + 2 * MARGIN + ixBorders, 384 + 2 * MARGIN + iyBorders, -/* CW_USEDEFAULT, CW_USEDEFAULT, */ - NULL, NULL, hInstance, NULL); - - ShowWindow (hwnd, iCmdShow); - UpdateWindow (hwnd); - - hAccel = LoadAccelerators (hInstance, szProgName); - - while (GetMessage (&msg, NULL, 0, 0)) - { - if (!TranslateAccelerator (hwnd, hAccel, &msg)) - { - TranslateMessage (&msg); - DispatchMessage (&msg); - } - } - return msg.wParam; -} - -LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, - LPARAM lParam) -{ - static HINSTANCE hInstance ; - static HDC hdc; - static PAINTSTRUCT ps; - static HMENU hMenu; - - static BITMAPFILEHEADER *pbmfh; - static BITMAPINFOHEADER *pbmih; - static BYTE *pbImage; - static int cxWinSize, cyWinSize; - static int cxImgSize, cyImgSize; - static int cImgChannels; - static png_color bkgColor = {127, 127, 127}; - - static BOOL bStretched = TRUE; - - static BYTE *pDib = NULL; - static BYTE *pDiData = NULL; - - static TCHAR szImgPathName [MAX_PATH]; - static TCHAR szTitleName [MAX_PATH]; - - static TCHAR *pPngFileList = NULL; - static int iPngFileCount; - static int iPngFileIndex; - - BOOL bOk; - - switch (message) - { - case WM_CREATE: - hInstance = ((LPCREATESTRUCT) lParam)->hInstance ; - PngFileInitialize (hwnd); - - strcpy (szImgPathName, ""); - - /* in case we process file given on command-line */ - - if (szCmdFileName[0] != '\0') - { - strcpy (szImgPathName, szCmdFileName); - - /* read the other png-files in the directory for later */ - /* next/previous commands */ - - BuildPngList (szImgPathName, &pPngFileList, &iPngFileCount, - &iPngFileIndex); - - /* load the image from file */ - - if (!LoadImageFile (hwnd, szImgPathName, - &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor)) - return 0; - - /* invalidate the client area for later update */ - - InvalidateRect (hwnd, NULL, TRUE); - - /* display the PNG into the DIBitmap */ - - DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, - pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); - } - - return 0; - - case WM_SIZE: - cxWinSize = LOWORD (lParam); - cyWinSize = HIWORD (lParam); - - /* invalidate the client area for later update */ - - InvalidateRect (hwnd, NULL, TRUE); - - /* display the PNG into the DIBitmap */ - - DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, - pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); - - return 0; - - case WM_INITMENUPOPUP: - hMenu = GetMenu (hwnd); - - if (pbImage) - EnableMenuItem (hMenu, IDM_FILE_SAVE, MF_ENABLED); - else - EnableMenuItem (hMenu, IDM_FILE_SAVE, MF_GRAYED); - - return 0; - - case WM_COMMAND: - hMenu = GetMenu (hwnd); - - switch (LOWORD (wParam)) - { - case IDM_FILE_OPEN: - - /* show the File Open dialog box */ - - if (!PngFileOpenDlg (hwnd, szImgPathName, szTitleName)) - return 0; - - /* read the other png-files in the directory for later */ - /* next/previous commands */ - - BuildPngList (szImgPathName, &pPngFileList, &iPngFileCount, - &iPngFileIndex); - - /* load the image from file */ - - if (!LoadImageFile (hwnd, szImgPathName, - &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor)) - return 0; - - /* invalidate the client area for later update */ - - InvalidateRect (hwnd, NULL, TRUE); - - /* display the PNG into the DIBitmap */ - - DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, - pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); - - return 0; - - case IDM_FILE_SAVE: - - /* show the File Save dialog box */ - - if (!PngFileSaveDlg (hwnd, szImgPathName, szTitleName)) - return 0; - - /* save the PNG to a disk file */ - - SetCursor (LoadCursor (NULL, IDC_WAIT)); - ShowCursor (TRUE); - - bOk = PngSaveImage (szImgPathName, pDiData, cxWinSize, cyWinSize, - bkgColor); - - ShowCursor (FALSE); - SetCursor (LoadCursor (NULL, IDC_ARROW)); - - if (!bOk) - MessageBox (hwnd, TEXT ("Error in saving the PNG image"), - szProgName, MB_ICONEXCLAMATION | MB_OK); - return 0; - - case IDM_FILE_NEXT: - - /* read next entry in the directory */ - - if (SearchPngList (pPngFileList, iPngFileCount, &iPngFileIndex, - NULL, szImgPathName)) - { - if (strcmp (szImgPathName, "") == 0) - return 0; - - /* load the image from file */ - - if (!LoadImageFile (hwnd, szImgPathName, &pbImage, - &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor)) - return 0; - - /* invalidate the client area for later update */ - - InvalidateRect (hwnd, NULL, TRUE); - - /* display the PNG into the DIBitmap */ - - DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, - pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); - } - - return 0; - - case IDM_FILE_PREVIOUS: - - /* read previous entry in the directory */ - - if (SearchPngList (pPngFileList, iPngFileCount, &iPngFileIndex, - szImgPathName, NULL)) - { - - if (strcmp (szImgPathName, "") == 0) - return 0; - - /* load the image from file */ - - if (!LoadImageFile (hwnd, szImgPathName, &pbImage, &cxImgSize, - &cyImgSize, &cImgChannels, &bkgColor)) - return 0; - - /* invalidate the client area for later update */ - - InvalidateRect (hwnd, NULL, TRUE); - - /* display the PNG into the DIBitmap */ - - DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, - pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); - } - - return 0; - - case IDM_FILE_EXIT: - - /* more cleanup needed... */ - - /* free image buffer */ - - if (pDib != NULL) - { - free (pDib); - pDib = NULL; - } - - /* free file-list */ - - if (pPngFileList != NULL) - { - free (pPngFileList); - pPngFileList = NULL; - } - - /* let's go ... */ - - exit (0); - - return 0; - - case IDM_OPTIONS_STRETCH: - bStretched = !bStretched; - if (bStretched) - CheckMenuItem (hMenu, IDM_OPTIONS_STRETCH, MF_CHECKED); - else - CheckMenuItem (hMenu, IDM_OPTIONS_STRETCH, MF_UNCHECKED); - - /* invalidate the client area for later update */ - - InvalidateRect (hwnd, NULL, TRUE); - - /* display the PNG into the DIBitmap */ - - DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize, - pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched); - - return 0; - - case IDM_HELP_ABOUT: - DialogBox (hInstance, TEXT ("AboutBox"), hwnd, AboutDlgProc) ; - return 0; - - } /* end switch */ - - break; - - case WM_PAINT: - hdc = BeginPaint (hwnd, &ps); - - if (pDib) - SetDIBitsToDevice (hdc, 0, 0, cxWinSize, cyWinSize, 0, 0, - 0, cyWinSize, pDiData, (BITMAPINFO *) pDib, DIB_RGB_COLORS); - - EndPaint (hwnd, &ps); - return 0; - - case WM_DESTROY: - if (pbmfh) - { - free (pbmfh); - pbmfh = NULL; - } - - PostQuitMessage (0); - return 0; - } - - return DefWindowProc (hwnd, message, wParam, lParam); -} - -BOOL CALLBACK AboutDlgProc (HWND hDlg, UINT message, - WPARAM wParam, LPARAM lParam) -{ - switch (message) - { - case WM_INITDIALOG : - ShowWindow (hDlg, SW_HIDE); - CenterAbout (hDlg, GetWindow (hDlg, GW_OWNER)); - ShowWindow (hDlg, SW_SHOW); - return TRUE ; - - case WM_COMMAND : - switch (LOWORD (wParam)) - { - case IDOK : - case IDCANCEL : - EndDialog (hDlg, 0) ; - return TRUE ; - } - break ; - } - return FALSE ; -} - -/*--------------- - * CenterAbout - *--------------- - */ -BOOL CenterAbout (HWND hwndChild, HWND hwndParent) -{ - RECT rChild, rParent, rWorkArea; - int wChild, hChild, wParent, hParent; - int xNew, yNew; - BOOL bResult; - - /* Get the Height and Width of the child window */ - GetWindowRect (hwndChild, &rChild); - wChild = rChild.right - rChild.left; - hChild = rChild.bottom - rChild.top; - - /* Get the Height and Width of the parent window */ - GetWindowRect (hwndParent, &rParent); - wParent = rParent.right - rParent.left; - hParent = rParent.bottom - rParent.top; - - /* Get the limits of the 'workarea' */ - bResult = SystemParametersInfo( - SPI_GETWORKAREA, /* system parameter to query or set */ - sizeof(RECT), - &rWorkArea, - 0); - if (!bResult) { - rWorkArea.left = rWorkArea.top = 0; - rWorkArea.right = GetSystemMetrics(SM_CXSCREEN); - rWorkArea.bottom = GetSystemMetrics(SM_CYSCREEN); - } - - /* Calculate new X position, then adjust for workarea */ - xNew = rParent.left + ((wParent - wChild) /2); - if (xNew < rWorkArea.left) { - xNew = rWorkArea.left; - } else if ((xNew+wChild) > rWorkArea.right) { - xNew = rWorkArea.right - wChild; - } - - /* Calculate new Y position, then adjust for workarea */ - yNew = rParent.top + ((hParent - hChild) /2); - if (yNew < rWorkArea.top) { - yNew = rWorkArea.top; - } else if ((yNew+hChild) > rWorkArea.bottom) { - yNew = rWorkArea.bottom - hChild; - } - - /* Set it, and return */ - return SetWindowPos (hwndChild, NULL, xNew, yNew, 0, 0, SWP_NOSIZE | - SWP_NOZORDER); -} - -/*---------------- - * BuildPngList - *---------------- - */ -BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount, - int *pFileIndex) -{ - static TCHAR szImgPathName [MAX_PATH]; - static TCHAR szImgFileName [MAX_PATH]; - static TCHAR szImgFindName [MAX_PATH]; - - WIN32_FIND_DATA finddata; - HANDLE hFind; - - static TCHAR szTmp [MAX_PATH]; - BOOL bOk; - int i, ii; - int j, jj; - - /* free previous file-list */ - - if (*ppFileList != NULL) - { - free (*ppFileList); - *ppFileList = NULL; - } - - /* extract foldername, filename and search-name */ - - strcpy (szImgPathName, pstrPathName); - strcpy (szImgFileName, strrchr (pstrPathName, '\\') + 1); - - strcpy (szImgFindName, szImgPathName); - *(strrchr (szImgFindName, '\\') + 1) = '\0'; - strcat (szImgFindName, "*.png"); - - /* first cycle: count number of files in directory for memory allocation */ - - *pFileCount = 0; - - hFind = FindFirstFile(szImgFindName, &finddata); - bOk = (hFind != (HANDLE) -1); - - while (bOk) - { - *pFileCount += 1; - bOk = FindNextFile(hFind, &finddata); - } - FindClose(hFind); - - /* allocation memory for file-list */ - - *ppFileList = (TCHAR *) malloc (*pFileCount * MAX_PATH); - - /* second cycle: read directory and store filenames in file-list */ - - hFind = FindFirstFile(szImgFindName, &finddata); - bOk = (hFind != (HANDLE) -1); - - i = 0; - ii = 0; - while (bOk) - { - strcpy (*ppFileList + ii, szImgPathName); - strcpy (strrchr(*ppFileList + ii, '\\') + 1, finddata.cFileName); - - if (strcmp(pstrPathName, *ppFileList + ii) == 0) - *pFileIndex = i; - - ii += MAX_PATH; - i++; - - bOk = FindNextFile(hFind, &finddata); - } - FindClose(hFind); - - /* finally we must sort the file-list */ - - for (i = 0; i < *pFileCount - 1; i++) - { - ii = i * MAX_PATH; - for (j = i+1; j < *pFileCount; j++) - { - jj = j * MAX_PATH; - if (strcmp (*ppFileList + ii, *ppFileList + jj) > 0) - { - strcpy (szTmp, *ppFileList + jj); - strcpy (*ppFileList + jj, *ppFileList + ii); - strcpy (*ppFileList + ii, szTmp); - - /* check if this was the current image that we moved */ - - if (*pFileIndex == i) - *pFileIndex = j; - else - if (*pFileIndex == j) - *pFileIndex = i; - } - } - } - - return TRUE; -} - -/*---------------- - * SearchPngList - *---------------- - */ - -BOOL SearchPngList ( - TCHAR *pFileList, int FileCount, int *pFileIndex, - PTSTR pstrPrevName, PTSTR pstrNextName) -{ - if (FileCount > 0) - { - /* get previous entry */ - - if (pstrPrevName != NULL) - { - if (*pFileIndex > 0) - *pFileIndex -= 1; - else - *pFileIndex = FileCount - 1; - - strcpy (pstrPrevName, pFileList + (*pFileIndex * MAX_PATH)); - } - - /* get next entry */ - - if (pstrNextName != NULL) - { - if (*pFileIndex < FileCount - 1) - *pFileIndex += 1; - else - *pFileIndex = 0; - - strcpy (pstrNextName, pFileList + (*pFileIndex * MAX_PATH)); - } - - return TRUE; - } - else - { - return FALSE; - } -} - -/*----------------- - * LoadImageFile - *----------------- - */ - -BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName, - png_byte **ppbImage, int *pxImgSize, int *pyImgSize, - int *piChannels, png_color *pBkgColor) -{ - static TCHAR szTmp [MAX_PATH]; - - /* if there's an existing PNG, free the memory */ - - if (*ppbImage) - { - free (*ppbImage); - *ppbImage = NULL; - } - - /* Load the entire PNG into memory */ - - SetCursor (LoadCursor (NULL, IDC_WAIT)); - ShowCursor (TRUE); - - PngLoadImage (pstrPathName, ppbImage, pxImgSize, pyImgSize, piChannels, - pBkgColor); - - ShowCursor (FALSE); - SetCursor (LoadCursor (NULL, IDC_ARROW)); - - if (*ppbImage != NULL) - { - sprintf (szTmp, "VisualPng - %s", strrchr(pstrPathName, '\\') + 1); - SetWindowText (hwnd, szTmp); - } - else - { - MessageBox (hwnd, TEXT ("Error in loading the PNG image"), - szProgName, MB_ICONEXCLAMATION | MB_OK); - return FALSE; - } - - return TRUE; -} - -/*---------------- - * DisplayImage - *---------------- - */ -BOOL DisplayImage (HWND hwnd, BYTE **ppDib, - BYTE **ppDiData, int cxWinSize, int cyWinSize, - BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels, - BOOL bStretched) -{ - BYTE *pDib = *ppDib; - BYTE *pDiData = *ppDiData; - /* BITMAPFILEHEADER *pbmfh; */ - BITMAPINFOHEADER *pbmih; - WORD wDIRowBytes; - png_color bkgBlack = {0, 0, 0}; - png_color bkgGray = {127, 127, 127}; - png_color bkgWhite = {255, 255, 255}; - - /* allocate memory for the Device Independant bitmap */ - - wDIRowBytes = (WORD) ((3 * cxWinSize + 3L) >> 2) << 2; - - if (pDib) - { - free (pDib); - pDib = NULL; - } - - if (!(pDib = (BYTE *) malloc (sizeof(BITMAPINFOHEADER) + - wDIRowBytes * cyWinSize))) - { - MessageBox (hwnd, TEXT ("Error in displaying the PNG image"), - szProgName, MB_ICONEXCLAMATION | MB_OK); - *ppDib = pDib = NULL; - return FALSE; - } - *ppDib = pDib; - memset (pDib, 0, sizeof(BITMAPINFOHEADER)); - - /* initialize the dib-structure */ - - pbmih = (BITMAPINFOHEADER *) pDib; - pbmih->biSize = sizeof(BITMAPINFOHEADER); - pbmih->biWidth = cxWinSize; - pbmih->biHeight = -((long) cyWinSize); - pbmih->biPlanes = 1; - pbmih->biBitCount = 24; - pbmih->biCompression = 0; - pDiData = pDib + sizeof(BITMAPINFOHEADER); - *ppDiData = pDiData; - - /* first fill bitmap with gray and image border */ - - InitBitmap (pDiData, cxWinSize, cyWinSize); - - /* then fill bitmap with image */ - - if (pbImage) - { - FillBitmap ( - pDiData, cxWinSize, cyWinSize, - pbImage, cxImgSize, cyImgSize, cImgChannels, - bStretched); - } - - return TRUE; -} - -/*-------------- - * InitBitmap - *-------------- - */ -BOOL InitBitmap (BYTE *pDiData, int cxWinSize, int cyWinSize) -{ - BYTE *dst; - int x, y, col; - - /* initialize the background with gray */ - - dst = pDiData; - for (y = 0; y < cyWinSize; y++) - { - col = 0; - for (x = 0; x < cxWinSize; x++) - { - /* fill with GRAY */ - *dst++ = 127; - *dst++ = 127; - *dst++ = 127; - col += 3; - } - /* rows start on 4 byte boundaries */ - while ((col % 4) != 0) - { - dst++; - col++; - } - } - - return TRUE; -} - -/*-------------- - * FillBitmap - *-------------- - */ -BOOL FillBitmap ( - BYTE *pDiData, int cxWinSize, int cyWinSize, - BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels, - BOOL bStretched) -{ - BYTE *pStretchedImage; - BYTE *pImg; - BYTE *src, *dst; - BYTE r, g, b, a; - const int cDIChannels = 3; - WORD wImgRowBytes; - WORD wDIRowBytes; - int cxNewSize, cyNewSize; - int cxImgPos, cyImgPos; - int xImg, yImg; - int xWin, yWin; - int xOld, yOld; - int xNew, yNew; - - if (bStretched) - { - cxNewSize = cxWinSize - 2 * MARGIN; - cyNewSize = cyWinSize - 2 * MARGIN; - - /* stretch the image to it's window determined size */ - - /* the following two are mathematically the same, but the first - * has side-effects because of rounding - */ -/* if ((cyNewSize / cxNewSize) > (cyImgSize / cxImgSize)) */ - if ((cyNewSize * cxImgSize) > (cyImgSize * cxNewSize)) - { - cyNewSize = cxNewSize * cyImgSize / cxImgSize; - cxImgPos = MARGIN; - cyImgPos = (cyWinSize - cyNewSize) / 2; - } - else - { - cxNewSize = cyNewSize * cxImgSize / cyImgSize; - cyImgPos = MARGIN; - cxImgPos = (cxWinSize - cxNewSize) / 2; - } - - pStretchedImage = malloc (cImgChannels * cxNewSize * cyNewSize); - pImg = pStretchedImage; - - for (yNew = 0; yNew < cyNewSize; yNew++) - { - yOld = yNew * cyImgSize / cyNewSize; - for (xNew = 0; xNew < cxNewSize; xNew++) - { - xOld = xNew * cxImgSize / cxNewSize; - - r = *(pbImage + cImgChannels * ((yOld * cxImgSize) + xOld) + 0); - g = *(pbImage + cImgChannels * ((yOld * cxImgSize) + xOld) + 1); - b = *(pbImage + cImgChannels * ((yOld * cxImgSize) + xOld) + 2); - *pImg++ = r; - *pImg++ = g; - *pImg++ = b; - if (cImgChannels == 4) - { - a = *(pbImage + cImgChannels * ((yOld * cxImgSize) + xOld) - + 3); - *pImg++ = a; - } - } - } - - /* calculate row-bytes */ - - wImgRowBytes = cImgChannels * cxNewSize; - wDIRowBytes = (WORD) ((cDIChannels * cxWinSize + 3L) >> 2) << 2; - - /* copy image to screen */ - - for (yImg = 0, yWin = cyImgPos; yImg < cyNewSize; yImg++, yWin++) - { - if (yWin >= cyWinSize - cyImgPos) - break; - src = pStretchedImage + yImg * wImgRowBytes; - dst = pDiData + yWin * wDIRowBytes + cxImgPos * cDIChannels; - - for (xImg = 0, xWin = cxImgPos; xImg < cxNewSize; xImg++, xWin++) - { - if (xWin >= cxWinSize - cxImgPos) - break; - r = *src++; - g = *src++; - b = *src++; - *dst++ = b; /* note the reverse order */ - *dst++ = g; - *dst++ = r; - if (cImgChannels == 4) - { - a = *src++; - } - } - } - - /* free memory */ - - if (pStretchedImage != NULL) - { - free (pStretchedImage); - pStretchedImage = NULL; - } - - } - - /* process the image not-stretched */ - - else - { - /* calculate the central position */ - - cxImgPos = (cxWinSize - cxImgSize) / 2; - cyImgPos = (cyWinSize - cyImgSize) / 2; - - /* check for image larger than window */ - - if (cxImgPos < MARGIN) - cxImgPos = MARGIN; - if (cyImgPos < MARGIN) - cyImgPos = MARGIN; - - /* calculate both row-bytes */ - - wImgRowBytes = cImgChannels * cxImgSize; - wDIRowBytes = (WORD) ((cDIChannels * cxWinSize + 3L) >> 2) << 2; - - /* copy image to screen */ - - for (yImg = 0, yWin = cyImgPos; yImg < cyImgSize; yImg++, yWin++) - { - if (yWin >= cyWinSize - MARGIN) - break; - src = pbImage + yImg * wImgRowBytes; - dst = pDiData + yWin * wDIRowBytes + cxImgPos * cDIChannels; - - for (xImg = 0, xWin = cxImgPos; xImg < cxImgSize; xImg++, xWin++) - { - if (xWin >= cxWinSize - MARGIN) - break; - r = *src++; - g = *src++; - b = *src++; - *dst++ = b; /* note the reverse order */ - *dst++ = g; - *dst++ = r; - if (cImgChannels == 4) - { - a = *src++; - } - } - } - } - - return TRUE; -} - -/*----------------- - * end of source - *----------------- - */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.dsp b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.dsp deleted file mode 100644 index 741ef6ce76f..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.dsp +++ /dev/null @@ -1,147 +0,0 @@ -# Microsoft Developer Studio Project File - Name="VisualPng" - Package Owner=<4>
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-# ** DO NOT EDIT **
-
-# TARGTYPE "Win32 (x86) Application" 0x0101
-
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-!MESSAGE This is not a valid makefile. To build this project using NMAKE,
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-!MESSAGE
-!MESSAGE NMAKE /f "VisualPng.mak".
-!MESSAGE
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-# ADD BASE CPP /nologo /W3 /O2 /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /D "PNG_NO_STDIO" /FD /c
-# SUBTRACT BASE CPP /YX
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-# SUBTRACT CPP /YX
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-# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
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-# ADD RSC /l 0x409 /d "NDEBUG"
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-# ADD BASE BSC32 /nologo
-# ADD BSC32 /nologo
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-# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386
-# ADD LINK32 ..\..\projects\visualc6\Win32_LIB_Release\libpng.lib ..\..\..\zlib\projects\visualc6\Win32_LIB_Release\zlib.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386
-# Begin Special Build Tool
-OutDir=.\Release
-SOURCE="$(InputPath)"
-PostBuild_Cmds=$(outdir)\VisualPng.exe ..\..\contrib\pngsuite\basn6a16.png
-# End Special Build Tool
-
-!ELSEIF "$(CFG)" == "VisualPng - Win32 Debug"
-
-# PROP BASE Use_MFC 0
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-# PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "PNG_NO_STDIO" /FD /GZ /c
-# SUBTRACT BASE CPP /YX
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-# SUBTRACT CPP /YX
-# ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
-# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
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-# ADD RSC /l 0x409 /d "_DEBUG"
-BSC32=bscmake.exe
-# ADD BASE BSC32 /nologo
-# ADD BSC32 /nologo
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-# ADD LINK32 ..\..\projects\visualc6\Win32_LIB_Release\libpng.lib ..\..\..\zlib\projects\visualc6\Win32_LIB_Release\zlib.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"msvcrt.lib" /pdbtype:sept
-# Begin Special Build Tool
-OutDir=.\Debug
-SOURCE="$(InputPath)"
-PostBuild_Cmds=$(outdir)\VisualPng.exe ..\..\contrib\pngsuite\basn6a16.png
-# End Special Build Tool
-
-!ENDIF
-
-# Begin Target
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-# Name "VisualPng - Win32 Release"
-# Name "VisualPng - Win32 Debug"
-# Begin Group "Source Files"
-
-# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
-# Begin Source File
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-SOURCE=.\PngFile.c
-# End Source File
-# Begin Source File
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-SOURCE=.\VisualPng.c
-# End Source File
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-
-# PROP Default_Filter "h;hpp;hxx;hm;inl"
-# Begin Source File
-
-SOURCE=.\cexcept.h
-# End Source File
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-SOURCE=.\PngFile.h
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-# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
-# Begin Source File
-
-SOURCE=.\VisualPng.ico
-# End Source File
-# Begin Source File
-
-SOURCE=.\VisualPng.rc
-# End Source File
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diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.dsw b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.dsw deleted file mode 100644 index a30e1cc1cdb..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.dsw +++ /dev/null @@ -1,29 +0,0 @@ -Microsoft Developer Studio Workspace File, Format Version 6.00
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diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.ico b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.ico Binary files differdeleted file mode 100644 index 68aa3719fb5..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.ico +++ /dev/null diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.png b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.png Binary files differdeleted file mode 100644 index c6aa80a9bfa..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.png +++ /dev/null diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.rc b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.rc deleted file mode 100644 index 6e0623a73cf..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/VisualPng.rc +++ /dev/null @@ -1,152 +0,0 @@ -//Microsoft Developer Studio generated resource script.
-//
-#include "resource.h"
-
-#define APSTUDIO_READONLY_SYMBOLS
-/////////////////////////////////////////////////////////////////////////////
-//
-// Generated from the TEXTINCLUDE 2 resource.
-//
-#include "afxres.h"
-
-/////////////////////////////////////////////////////////////////////////////
-#undef APSTUDIO_READONLY_SYMBOLS
-
-/////////////////////////////////////////////////////////////////////////////
-// English (U.S.) resources
-
-#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
-#ifdef _WIN32
-LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
-#pragma code_page(1252)
-#endif //_WIN32
-
-#ifdef APSTUDIO_INVOKED
-/////////////////////////////////////////////////////////////////////////////
-//
-// TEXTINCLUDE
-//
-
-1 TEXTINCLUDE DISCARDABLE
-BEGIN
- "resource.h\0"
-END
-
-2 TEXTINCLUDE DISCARDABLE
-BEGIN
- "#include ""afxres.h""\r\n"
- "\0"
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-
-3 TEXTINCLUDE DISCARDABLE
-BEGIN
- "\r\n"
- "\0"
-END
-
-#endif // APSTUDIO_INVOKED
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Menu
-//
-
-VISUALPNG MENU DISCARDABLE
-BEGIN
- POPUP "&File"
- BEGIN
- MENUITEM "&Open Image...\tCtrl+O", IDM_FILE_OPEN
- MENUITEM "Save &As...", IDM_FILE_SAVE
- MENUITEM SEPARATOR
- MENUITEM "&Next Image\tCtrl+N", IDM_FILE_NEXT
- MENUITEM "Pre&vious Image\tCtrl+V", IDM_FILE_PREVIOUS
- MENUITEM SEPARATOR
- MENUITEM "E&xit\tAlt+X", IDM_FILE_EXIT
- END
- POPUP "&Options"
- BEGIN
- MENUITEM "&Stretch", IDM_OPTIONS_STRETCH, CHECKED
- END
- POPUP "&Help"
- BEGIN
- MENUITEM "&About", IDM_HELP_ABOUT
- END
-END
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Accelerator
-//
-
-VISUALPNG ACCELERATORS DISCARDABLE
-BEGIN
- "N", IDM_FILE_NEXT, VIRTKEY, CONTROL, NOINVERT
- "O", IDM_FILE_OPEN, VIRTKEY, CONTROL, NOINVERT
- "P", IDM_FILE_PREVIOUS, VIRTKEY, CONTROL, NOINVERT
- "V", IDM_FILE_PREVIOUS, VIRTKEY, CONTROL, NOINVERT
- "X", IDM_FILE_EXIT, VIRTKEY, ALT, NOINVERT
-END
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Icon
-//
-
-// Icon with lowest ID value placed first to ensure application icon
-// remains consistent on all systems.
-VISUALPNG ICON DISCARDABLE "VisualPng.ico"
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Dialog
-//
-
-ABOUTBOX DIALOG DISCARDABLE 0, 0, 186, 94
-STYLE DS_MODALFRAME | WS_POPUP
-FONT 8, "MS Sans Serif"
-BEGIN
- DEFPUSHBUTTON "OK",IDOK,68,67,50,14
- CTEXT "VisualPng 1.0 - June 2000",IDC_STATIC,49,14,88,8
- LTEXT "a PNG image viewer",IDC_STATIC,60,30,66,8
- LTEXT "(c) Willem van Schaik, 2000",IDC_STATIC,48,52,90,8
- LTEXT "to demonstrate the use of libpng in Visual C",
- IDC_STATIC,25,38,136,8
-END
-
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// DESIGNINFO
-//
-
-#ifdef APSTUDIO_INVOKED
-GUIDELINES DESIGNINFO DISCARDABLE
-BEGIN
- "ABOUTBOX", DIALOG
- BEGIN
- LEFTMARGIN, 7
- RIGHTMARGIN, 179
- TOPMARGIN, 7
- BOTTOMMARGIN, 87
- END
-END
-#endif // APSTUDIO_INVOKED
-
-#endif // English (U.S.) resources
-/////////////////////////////////////////////////////////////////////////////
-
-
-
-#ifndef APSTUDIO_INVOKED
-/////////////////////////////////////////////////////////////////////////////
-//
-// Generated from the TEXTINCLUDE 3 resource.
-//
-
-
-/////////////////////////////////////////////////////////////////////////////
-#endif // not APSTUDIO_INVOKED
-
diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/cexcept.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/cexcept.h deleted file mode 100644 index 5f45d769758..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/cexcept.h +++ /dev/null @@ -1,248 +0,0 @@ -/*=== -cexcept.h 2.0.1 (2008-Jul-19-Sat) -http://www.nicemice.net/cexcept/ -Adam M. Costello -http://www.nicemice.net/amc/ - -An interface for exception-handling in ANSI C (C89 and subsequent ISO -standards), developed jointly with Cosmin Truta. - - Copyright (c) 2000-2008 Adam M. Costello and Cosmin Truta. - This software may be modified only if its author and version - information is updated accurately, and may be redistributed - only if accompanied by this unaltered notice. Subject to those - restrictions, permission is granted to anyone to do anything - with this software. The copyright holders make no guarantees - regarding this software, and are not responsible for any damage - resulting from its use. - -The cexcept interface is not compatible with and cannot interact -with system exceptions (like division by zero or memory segmentation -violation), compiler-generated exceptions (like C++ exceptions), or -other exception-handling interfaces. - -When using this interface across multiple .c files, do not include -this header file directly. Instead, create a wrapper header file that -includes this header file and then invokes the define_exception_type -macro (see below). The .c files should then include that header file. - -The interface consists of one type, one well-known name, and six macros. - - -define_exception_type(type_name); - - This macro is used like an external declaration. It specifies - the type of object that gets copied from the exception thrower to - the exception catcher. The type_name can be any type that can be - assigned to, that is, a non-constant arithmetic type, struct, union, - or pointer. Examples: - - define_exception_type(int); - - enum exception { out_of_memory, bad_arguments, disk_full }; - define_exception_type(enum exception); - - struct exception { int code; const char *msg; }; - define_exception_type(struct exception); - - Because throwing an exception causes the object to be copied (not - just once, but twice), programmers may wish to consider size when - choosing the exception type. - - -struct exception_context; - - This type may be used after the define_exception_type() macro has - been invoked. A struct exception_context must be known to both - the thrower and the catcher. It is expected that there be one - context for each thread that uses exceptions. It would certainly - be dangerous for multiple threads to access the same context. - One thread can use multiple contexts, but that is likely to be - confusing and not typically useful. The application can allocate - this structure in any way it pleases--automatic, static, or dynamic. - The application programmer should pretend not to know the structure - members, which are subject to change. - - -struct exception_context *the_exception_context; - - The Try/Catch and Throw statements (described below) implicitly - refer to a context, using the name the_exception_context. It is - the application's responsibility to make sure that this name yields - the address of a mutable (non-constant) struct exception_context - wherever those statements are used. Subject to that constraint, the - application may declare a variable of this name anywhere it likes - (inside a function, in a parameter list, or externally), and may - use whatever storage class specifiers (static, extern, etc) or type - qualifiers (const, volatile, etc) it likes. Examples: - - static struct exception_context - * const the_exception_context = &foo; - - { struct exception_context *the_exception_context = bar; ... } - - int blah(struct exception_context *the_exception_context, ...); - - extern struct exception_context the_exception_context[1]; - - The last example illustrates a trick that avoids creating a pointer - object separate from the structure object. - - The name could even be a macro, for example: - - struct exception_context ec_array[numthreads]; - #define the_exception_context (ec_array + thread_id) - - Be aware that the_exception_context is used several times by the - Try/Catch/Throw macros, so it shouldn't be expensive or have side - effects. The expansion must be a drop-in replacement for an - identifier, so it's safest to put parentheses around it. - - -void init_exception_context(struct exception_context *ec); - - For context structures allocated statically (by an external - definition or using the "static" keyword), the implicit - initialization to all zeros is sufficient, but contexts allocated - by other means must be initialized using this macro before they - are used by a Try/Catch statement. It does no harm to initialize - a context more than once (by using this macro on a statically - allocated context, or using this macro twice on the same context), - but a context must not be re-initialized after it has been used by a - Try/Catch statement. - - -Try statement -Catch (expression) statement - - The Try/Catch/Throw macros are capitalized in order to avoid - confusion with the C++ keywords, which have subtly different - semantics. - - A Try/Catch statement has a syntax similar to an if/else statement, - except that the parenthesized expression goes after the second - keyword rather than the first. As with if/else, there are two - clauses, each of which may be a simple statement ending with a - semicolon or a brace-enclosed compound statement. But whereas - the else clause is optional, the Catch clause is required. The - expression must be a modifiable lvalue (something capable of being - assigned to) of the same type (disregarding type qualifiers) that - was passed to define_exception_type(). - - If a Throw that uses the same exception context as the Try/Catch is - executed within the Try clause (typically within a function called - by the Try clause), and the exception is not caught by a nested - Try/Catch statement, then a copy of the exception will be assigned - to the expression, and control will jump to the Catch clause. If no - such Throw is executed, then the assignment is not performed, and - the Catch clause is not executed. - - The expression is not evaluated unless and until the exception is - caught, which is significant if it has side effects, for example: - - Try foo(); - Catch (p[++i].e) { ... } - - IMPORTANT: Jumping into or out of a Try clause (for example via - return, break, continue, goto, longjmp) is forbidden--the compiler - will not complain, but bad things will happen at run-time. Jumping - into or out of a Catch clause is okay, and so is jumping around - inside a Try clause. In many cases where one is tempted to return - from a Try clause, it will suffice to use Throw, and then return - from the Catch clause. Another option is to set a flag variable and - use goto to jump to the end of the Try clause, then check the flag - after the Try/Catch statement. - - IMPORTANT: The values of any non-volatile automatic variables - changed within the Try clause are undefined after an exception is - caught. Therefore, variables modified inside the Try block whose - values are needed later outside the Try block must either use static - storage or be declared with the "volatile" type qualifier. - - -Throw expression; - - A Throw statement is very much like a return statement, except that - the expression is required. Whereas return jumps back to the place - where the current function was called, Throw jumps back to the Catch - clause of the innermost enclosing Try clause. The expression must - be compatible with the type passed to define_exception_type(). The - exception must be caught, otherwise the program may crash. - - Slight limitation: If the expression is a comma-expression, it must - be enclosed in parentheses. - - -Try statement -Catch_anonymous statement - - When the value of the exception is not needed, a Try/Catch statement - can use Catch_anonymous instead of Catch (expression). - - -Everything below this point is for the benefit of the compiler. The -application programmer should pretend not to know any of it, because it -is subject to change. - -===*/ - - -#ifndef CEXCEPT_H -#define CEXCEPT_H - - -#include <setjmp.h> - -#define define_exception_type(etype) \ -struct exception_context { \ - jmp_buf *penv; \ - int caught; \ - volatile struct { etype etmp; } v; \ -} - -/* etmp must be volatile because the application might use automatic */ -/* storage for the_exception_context, and etmp is modified between */ -/* the calls to setjmp() and longjmp(). A wrapper struct is used to */ -/* avoid warnings about a duplicate volatile qualifier in case etype */ -/* already includes it. */ - -#define init_exception_context(ec) ((void)((ec)->penv = 0)) - -#define Try \ - { \ - jmp_buf *exception__prev, exception__env; \ - exception__prev = the_exception_context->penv; \ - the_exception_context->penv = &exception__env; \ - if (setjmp(exception__env) == 0) { \ - do - -#define exception__catch(action) \ - while (the_exception_context->caught = 0, \ - the_exception_context->caught); \ - } \ - else { \ - the_exception_context->caught = 1; \ - } \ - the_exception_context->penv = exception__prev; \ - } \ - if (!the_exception_context->caught || action) { } \ - else - -#define Catch(e) exception__catch(((e) = the_exception_context->v.etmp, 0)) -#define Catch_anonymous exception__catch(0) - -/* Try ends with do, and Catch begins with while(0) and ends with */ -/* else, to ensure that Try/Catch syntax is similar to if/else */ -/* syntax. */ -/* */ -/* The 0 in while(0) is expressed as x=0,x in order to appease */ -/* compilers that warn about constant expressions inside while(). */ -/* Most compilers should still recognize that the condition is always */ -/* false and avoid generating code for it. */ - -#define Throw \ - for (;; longjmp(*the_exception_context->penv, 1)) \ - the_exception_context->v.etmp = - - -#endif /* CEXCEPT_H */ diff --git a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/resource.h b/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/resource.h deleted file mode 100644 index b62176d1dca..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.16/contrib/visupng/resource.h +++ /dev/null @@ -1,23 +0,0 @@ -//{{NO_DEPENDENCIES}} -// Microsoft Developer Studio generated include file. -// Used by VisualPng.rc -// -#define IDM_FILE_OPEN 40001 -#define IDM_FILE_SAVE 40002 -#define IDM_FILE_NEXT 40003 -#define IDM_FILE_PREVIOUS 40004 -#define IDM_FILE_EXIT 40005 -#define IDM_OPTIONS_BACKGROUND 40006 -#define IDM_OPTIONS_STRETCH 40007 -#define IDM_HELP_ABOUT 40008 - -// Next default values for new objects -// -#ifdef APSTUDIO_INVOKED -#ifndef APSTUDIO_READONLY_SYMBOLS -#define _APS_NEXT_RESOURCE_VALUE 113 -#define _APS_NEXT_COMMAND_VALUE 40009 -#define _APS_NEXT_CONTROL_VALUE 1001 -#define _APS_NEXT_SYMED_VALUE 101 -#endif -#endif |