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-rw-r--r--Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c1486
1 files changed, 0 insertions, 1486 deletions
diff --git a/Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c b/Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c
deleted file mode 100644
index 9f11b29645b..00000000000
--- a/Build/source/libs/libpng/libpng-1.6.2/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;
- }
-}