libpng-1.6.34

git-svn-id: svn://tug.org/texlive/trunk@45428 c570f23f-e606-0410-a88d-b1316a301751

48 files changed, 534 insertions, 240 deletions

diff --git a/Build/source/libs/README b/Build/source/libs/README
index 854d454b119..69d1ab761a3 100644
--- a/Build/source/libs/README
+++ b/Build/source/libs/README
@@ -33,7 +33,7 @@ icu 58.2 - checked 13mar17
 libpaper 1.1.24+nmu2 - checked 24oct13
   ftp://ftp.de.debian.org/debian/pool/main/libp/libpaper/
 
-libpng 1.6.32 - checked 24aug17
+libpng 1.6.34 - checked 29Sep17
   http://www.libpng.org/ - used by many
   http://www.libpng.org/pub/png/pngcode.html
 
diff --git a/Build/source/libs/libpng/ChangeLog b/Build/source/libs/libpng/ChangeLog
index e346a055a19..dc25a7323e5 100644
--- a/Build/source/libs/libpng/ChangeLog
+++ b/Build/source/libs/libpng/ChangeLog
@@ -1,3 +1,8 @@
+2017-09-29 Akira Kakuto  <kakuto@fuk.kindai.ac.jp>
+
+	Import libpng-1.6.34.
+	* version.ac: Adjust.
+
 2017-08-24 Akira Kakuto  <kakuto@fuk.kindai.ac.jp>
 
 	Import libpng-1.6.32.
diff --git a/Build/source/libs/libpng/README b/Build/source/libs/libpng/README
index ab65bbdfc82..d99e08a0713 100644
--- a/Build/source/libs/libpng/README
+++ b/Build/source/libs/libpng/README
@@ -1,4 +1,4 @@
-	Building libpng-1.6.32 as part of the TL tree
+	Building libpng-1.6.34 as part of the TL tree
 	=============================================
 
 This directory libs/libpng/ uses a proxy Makefile.am to build the libpng library
@@ -14,4 +14,4 @@ copied to libs/libpng/configure.ac.
 =============================
 
 2009-07-23	Peter Breitenlohner <peb@mppmu.mpg.de>
-2017-08-24	Akira Kakuto <kakuto@fuk.kindai.ac.jp>
+2017-09-29	Akira Kakuto <kakuto@fuk.kindai.ac.jp>
diff --git a/Build/source/libs/libpng/TLpatches/ChangeLog b/Build/source/libs/libpng/TLpatches/ChangeLog
index 4bb45d8db6b..72e1df74fc4 100644
--- a/Build/source/libs/libpng/TLpatches/ChangeLog
+++ b/Build/source/libs/libpng/TLpatches/ChangeLog
@@ -1,3 +1,7 @@
+2017-09-29  Akira Kakuto <kakuto@fuk.kindai.ac.jp>
+
+	Import libpng-1.6.34.
+
 2017-08-24  Akira Kakuto <kakuto@fuk.kindai.ac.jp>
 
 	Import libpng-1.6.32.
diff --git a/Build/source/libs/libpng/TLpatches/TL-Changes b/Build/source/libs/libpng/TLpatches/TL-Changes
index fce3a08b896..736e3c79eaf 100644
--- a/Build/source/libs/libpng/TLpatches/TL-Changes
+++ b/Build/source/libs/libpng/TLpatches/TL-Changes
@@ -1,5 +1,5 @@
-Changes applied to the libpng-1.6.32/ tree as obtained from:
-	http://www.libpng.org/ libpng-1.6.32.tar.xz
+Changes applied to the libpng-1.6.34/ tree as obtained from:
+	http://www.libpng.org/ libpng-1.6.34.tar.xz
 
 Copied:
 	scripts/pnglibconf.h.prebuilt -> pnglibconf.h
diff --git a/Build/source/libs/libpng/configure b/Build/source/libs/libpng/configure
index b086485f2b4..901f4cbc2ae 100755
--- a/Build/source/libs/libpng/configure
+++ b/Build/source/libs/libpng/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for libpng (TeX Live) 1.6.32.
+# Generated by GNU Autoconf 2.69 for libpng (TeX Live) 1.6.34.
 #
 # Report bugs to <tex-k@tug.org>.
 #
@@ -580,8 +580,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='libpng (TeX Live)'
 PACKAGE_TARNAME='libpng--tex-live-'
-PACKAGE_VERSION='1.6.32'
-PACKAGE_STRING='libpng (TeX Live) 1.6.32'
+PACKAGE_VERSION='1.6.34'
+PACKAGE_STRING='libpng (TeX Live) 1.6.34'
 PACKAGE_BUGREPORT='tex-k@tug.org'
 PACKAGE_URL=''
 
@@ -1287,7 +1287,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures libpng (TeX Live) 1.6.32 to adapt to many kinds of systems.
+\`configure' configures libpng (TeX Live) 1.6.34 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1354,7 +1354,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng (TeX Live) 1.6.32:";;
+     short | recursive ) echo "Configuration of libpng (TeX Live) 1.6.34:";;
    esac
   cat <<\_ACEOF
 
@@ -1459,7 +1459,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng (TeX Live) configure 1.6.32
+libpng (TeX Live) configure 1.6.34
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1882,7 +1882,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng (TeX Live) $as_me 1.6.32, which was
+It was created by libpng (TeX Live) $as_me 1.6.34, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -3805,7 +3805,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='libpng--tex-live-'
- VERSION='1.6.32'
+ VERSION='1.6.34'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -6358,7 +6358,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng (TeX Live) $as_me 1.6.32, which was
+This file was extended by libpng (TeX Live) $as_me 1.6.34, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -6424,7 +6424,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-libpng (TeX Live) config.status 1.6.32
+libpng (TeX Live) config.status 1.6.34
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/Build/source/libs/libpng/libpng-src/ANNOUNCE b/Build/source/libs/libpng/libpng-src/ANNOUNCE
index 3cbe5a926e9..0f66c0d1da6 100644
--- a/Build/source/libs/libpng/libpng-src/ANNOUNCE
+++ b/Build/source/libs/libpng/libpng-src/ANNOUNCE
@@ -1,4 +1,4 @@
-Libpng 1.6.32 - August 24, 2017
+Libpng 1.6.34 - September 29, 2017
 
 This is a public release of libpng, intended for use in production codes.
 
@@ -7,79 +7,24 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.6.32.tar.xz (LZMA-compressed, recommended)
-   libpng-1.6.32.tar.gz
+   libpng-1.6.34.tar.xz (LZMA-compressed, recommended)
+   libpng-1.6.34.tar.gz
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1632.7z  (LZMA-compressed, recommended)
-   lpng1632.zip
+   lpng1634.7z  (LZMA-compressed, recommended)
+   lpng1634.zip
 
 Other information:
 
-   libpng-1.6.32-README.txt
-   libpng-1.6.32-LICENSE.txt
-   libpng-1.6.32-*.asc (armored detached GPG signatures)
+   libpng-1.6.34-README.txt
+   libpng-1.6.34-LICENSE.txt
+   libpng-1.6.34-*.asc (armored detached GPG signatures)
 
-Changes since the last public release (1.6.31):
-  Avoid possible NULL dereference in png_handle_eXIf when benign_errors
-    are allowed. Avoid leaking the input buffer "eXIf_buf".
-  Eliminated png_ptr->num_exif member from pngstruct.h and added num_exif
-    to arguments for png_get_eXIf() and png_set_eXIf().
-  Added calls to png_handle_eXIf(() in pngread.c and png_write_eXIf() in
-    pngwrite.c, and made various other fixes to png_write_eXIf().
-  Changed name of png_get_eXIF and png_set_eXIf() to png_get_eXIf_1() and
-    png_set_eXIf_1(), respectively, to avoid breaking API compatibility
-    with libpng-1.6.31.
-  Updated contrib/libtests/pngunknown.c with eXIf chunk.
-  Initialized btoa[] in pngstest.c
-  Stop memory leak when returning from png_handle_eXIf() with an error
-    (Bug report from the OSS-fuzz project).
-  Replaced local eXIf_buf with info_ptr-eXIf_buf in png_handle_eXIf().
-  Update libpng.3 and libpng-manual.txt about eXIf functions.
-  Restored png_get_eXIf() and png_set_eXIf() to maintain API compatability.
-  Removed png_get_eXIf_1() and png_set_eXIf_1().
-  Check length of all chunks except IDAT against user limit to fix an
-    OSS-fuzz issue.
-  Check length of IDAT against maximum possible IDAT size, accounting
-    for height, rowbytes, interlacing and zlib/deflate overhead.
-  Restored png_get_eXIf_1() and png_set_eXIf_1(), because strlen(eXIf_buf)
-    does not work (the eXIf chunk data can contain zeroes).
-  Require cmake-2.8.8 in CMakeLists.txt. Revised symlink creation,
-    no longer using deprecated cmake LOCATION feature (Clifford Yapp).
-  Fixed five-byte error in the calculation of IDAT maximum possible size.
-  Moved chunk-length check into a png_check_chunk_length() private
-    function (Suggested by Max Stepin).
-  Moved bad pngs from tests to contrib/libtests/crashers
-  Moved testing of bad pngs into a separate tests/pngtest-badpngs script
-  Added the --xfail (expected FAIL) option to pngtest.c. It writes XFAIL
-    in the output but PASS for the libpng test.
-  Require cmake-3.0.2 in CMakeLists.txt (Clifford Yapp).
-  Fix "const" declaration info_ptr argument to png_get_eXIf_1() and the
-    num_exif argument to png_get_eXIf_1() (Github Issue 171).
-  Added "eXIf" to "chunks_to_ignore[]" in png_set_keep_unknown_chunks().
-  Added huge_IDAT.png and empty_ancillary_chunks.png to testpngs/crashers.
-  Make pngtest --strict, --relax, --xfail options imply -m (multiple).
-  Removed unused chunk_name parameter from png_check_chunk_length().
-  Relocated setting free_me for eXIf data, to stop an OSS-fuzz leak.
-  Initialize profile_header[] in png_handle_iCCP() to fix OSS-fuzz issue.
-  Initialize png_ptr->row_buf[0] to 255 in png_read_row() to fix OSS-fuzz UMR.
-  Attempt to fix a UMR in png_set_text_2() to fix OSS-fuzz issue.
-  Increase minimum zlib stream from 9 to 14 in png_handle_iCCP(), to account
-    for the minimum 'deflate' stream, and relocate the test to a point
-    after the keyword has been read.
-  Check that the eXIf chunk has at least 2 bytes and begins with "II" or "MM".
-  Added a set of "huge_xxxx_chunk.png" files to contrib/testpngs/crashers,
-    one for each known chunk type, with length = 2GB-1.
-  Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts
-    in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706,
-    and 162707).
-  Renamed chunks in contrib/testpngs/crashers to avoid having files whose
-    names differ only in case; this causes problems with some platforms
-    (github issue #172).
-  Added contrib/oss-fuzz directory which contains files used by the oss-fuzz
-    project (https://github.com/google/oss-fuzz/tree/master/projects/libpng).
+Changes since the last public release (1.6.33):
+  Removed contrib/pngsuite/i*.png; some of these were incorrect and caused
+    test failures.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/Build/source/libs/libpng/libpng-src/CHANGES b/Build/source/libs/libpng/libpng-src/CHANGES
index 14e60dd2697..4b82118910e 100644
--- a/Build/source/libs/libpng/libpng-src/CHANGES
+++ b/Build/source/libs/libpng/libpng-src/CHANGES
@@ -833,7 +833,7 @@ Version 1.0.7beta11 [May 7, 2000]
   Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
     which are no longer used.
   Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
-    defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED
+    defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXt_SUPPORTED
     is defined.
   Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
     overrun when old applications fill the info_ptr->text structure directly.
@@ -5939,7 +5939,7 @@ Version 1.6.32beta06 [August 2, 2017]
 
 Version 1.6.32beta07 [August 3, 2017]
   Check length of all chunks except IDAT against user limit to fix an
-    OSS-fuzz issue.
+    OSS-fuzz issue (Fixes CVE-2017-12652).
 
 Version 1.6.32beta08 [August 3, 2017]
   Check length of IDAT against maximum possible IDAT size, accounting
@@ -5994,6 +5994,53 @@ Version 1.6.32rc02 [August 22, 2017]
 Version 1.6.32 [August 24, 2017]
   No changes.
 
+Version 1.6.33beta01 [August 28, 2017]
+  Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing
+    parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse).
+  Fixed off-by-one error in png_do_check_palette_indexes() (Bug report
+    by Mick P., Source Forge Issue #269).
+
+Version 1.6.33beta02 [September 3, 2017]
+  Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc
+    to fix shortlived oss-fuzz issue 3234.
+  Compute a larger limit on IDAT because some applications write a deflate
+    buffer for each row (Bug report by Andrew Church).
+  Use current date (DATE) instead of release-date (RDATE) in last
+    changed date of contrib/oss-fuzz files.
+  Enabled ARM support in CMakeLists.txt (Bernd Kuhls).
+
+Version 1.6.33beta03 [September 14, 2017]
+  Fixed incorrect typecast of some arguments to png_malloc() and
+    png_calloc() that were png_uint_32 instead of png_alloc_size_t
+    (Bug report by "irwir" in Github libpng issue #175).
+  Use pnglibconf.h.prebuilt when building for ANDROID with cmake (Github
+    issue 162, by rcdailey).
+
+Version 1.6.33rc01 [September 20, 2017]
+  Initialize memory allocated by png_inflate to zero, using memset, to
+    stop an oss-fuzz "use of uninitialized value" detection in png_set_text_2()
+    due to truncated iTXt or zTXt chunk.
+  Initialize memory allocated by png_read_buffer to zero, using memset, to
+    stop an oss-fuzz "use of uninitialized value" detection in
+    png_icc_check_tag_table() due to truncated iCCP chunk.
+  Removed a redundant test (suggested by "irwir" in Github issue #180).
+
+Version 1.6.33rc02 [September 23, 2017]
+  Added an interlaced version of each file in contrib/pngsuite.
+  Relocate new memset() call in pngrutil.c.
+  Removed more redundant tests (suggested by "irwir" in Github issue #180).
+  Add support for loading images with associated alpha in the Simplified
+    API (Samuel Williams).
+
+Version 1.6.33 [September 28, 2017]
+  Revert contrib/oss-fuzz/libpng_read_fuzzer.cc to libpng-1.6.32 state.
+  Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc
+  Add end_info structure and png_read_end() to the libpng fuzzer.
+
+Version 1.6.34 [September 29, 2017]
+  Removed contrib/pngsuite/i*.png; some of these were incorrect and caused
+    test failures.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/Build/source/libs/libpng/libpng-src/CMakeLists.txt b/Build/source/libs/libpng/libpng-src/CMakeLists.txt
index 7a51f006450..48c6fa28795 100644
--- a/Build/source/libs/libpng/libpng-src/CMakeLists.txt
+++ b/Build/source/libs/libpng/libpng-src/CMakeLists.txt
@@ -31,12 +31,12 @@ endif(POLICY CMP0054)
 
 set(CMAKE_CONFIGURATION_TYPES "Release;Debug;MinSizeRel;RelWithDebInfo")
 
-project(libpng C)
+project(libpng ASM C)
 enable_testing()
 
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 6)
-set(PNGLIB_RELEASE 32)
+set(PNGLIB_RELEASE 34)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
 
@@ -262,7 +262,7 @@ find_program(AWK NAMES gawk awk)
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
-if(NOT AWK)
+if(NOT AWK OR ANDROID)
   # No awk available to generate sources; use pre-built pnglibconf.h
   configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt
                  ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h)
@@ -441,7 +441,7 @@ else()
     "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk"
     "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out"
     "${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out")
-endif(NOT AWK)
+endif(NOT AWK OR ANDROID)
 
 # OUR SOURCES
 set(libpng_public_hdrs
@@ -455,7 +455,7 @@ set(libpng_private_hdrs
   pnginfo.h
   pngstruct.h
 )
-if(AWK)
+if(AWK AND NOT ANDROID)
   list(APPEND libpng_private_hdrs "${CMAKE_CURRENT_BINARY_DIR}/pngprefix.h")
 endif()
 set(libpng_sources
@@ -844,7 +844,7 @@ endif(NOT WIN32 OR CYGWIN OR MINGW)
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(png PROPERTIES
-#   VERSION 16.${PNGLIB_RELEASE}.1.6.32
+#   VERSION 16.${PNGLIB_RELEASE}.1.6.34
     VERSION 16.${PNGLIB_RELEASE}.0
     SOVERSION 16
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/Build/source/libs/libpng/libpng-src/LICENSE b/Build/source/libs/libpng/libpng-src/LICENSE
index e803911d37b..4cda4fa0add 100644
--- a/Build/source/libs/libpng/libpng-src/LICENSE
+++ b/Build/source/libs/libpng/libpng-src/LICENSE
@@ -10,7 +10,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000 through 1.6.32, August 24, 2017 are
+libpng versions 1.0.7, July 1, 2000 through 1.6.34, September 29, 2017 are
 Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -130,4 +130,4 @@ any encryption software.  See the EAR, paragraphs 734.3(b)(3) and
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-April 1, 2017
+September 29, 2017
diff --git a/Build/source/libs/libpng/libpng-src/README b/Build/source/libs/libpng/libpng-src/README
index 71292715eba..0da5a5ef839 100644
--- a/Build/source/libs/libpng/libpng-src/README
+++ b/Build/source/libs/libpng/libpng-src/README
@@ -1,4 +1,4 @@
-README for libpng version 1.6.32 - August 24, 2017 (shared library 16.0)
+README for libpng version 1.6.34 - September 29, 2017 (shared library 16.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/Build/source/libs/libpng/libpng-src/configure.ac b/Build/source/libs/libpng/libpng-src/configure.ac
index 4f0eed43900..e3cfafd6edd 100644
--- a/Build/source/libs/libpng/libpng-src/configure.ac
+++ b/Build/source/libs/libpng/libpng-src/configure.ac
@@ -25,7 +25,7 @@ AC_PREREQ([2.68])
 
 dnl Version number stuff here:
 
-AC_INIT([libpng],[1.6.32],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.34],[png-mng-implement@lists.sourceforge.net])
 AC_CONFIG_MACRO_DIR([scripts])
 
 # libpng does not follow GNU file name conventions (hence 'foreign')
@@ -46,10 +46,10 @@ dnl automake, so the following is not necessary (and is not defined anyway):
 dnl AM_PREREQ([1.11.2])
 dnl stop configure from automagically running automake
 
-PNGLIB_VERSION=1.6.32
+PNGLIB_VERSION=1.6.34
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
-PNGLIB_RELEASE=32
+PNGLIB_RELEASE=34
 
 dnl End of version number stuff
 
diff --git a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/Dockerfile b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/Dockerfile
new file mode 100644
index 00000000000..7e4d1ebff2c
--- /dev/null
+++ b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/Dockerfile
@@ -0,0 +1,24 @@
+# Copyright 2016 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder
+MAINTAINER glennrp@gmail.com
+RUN apt-get update && apt-get install -y make autoconf automake libtool zlib1g-dev
+
+RUN git clone --depth 1 https://github.com/glennrp/libpng.git
+RUN (cd libpng; git log | head -1)
+WORKDIR libpng
+COPY build.sh $SRC/
diff --git a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/README.txt b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/README.txt
index a75cba487ff..a2b67366584 100644
--- a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/README.txt
+++ b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/README.txt
@@ -1,4 +1,4 @@
-Last changed in libpng 1.6.32 [August 24, 2017]
+Last changed in libpng 1.6.33 [September 28, 2017]
 Copyright (c) 2017 Glenn Randers-Pehrson
 
 This code is released under the libpng license.
@@ -13,7 +13,7 @@ They were licensed by Google Inc, using the BSD-like Chromium license,
 which may be found at https://cs.chromium.org/chromium/src/LICENSE, or, if
 noted in the source, under the Apache-2.0 license, which may
 be found at http://www.apache.org/licenses/LICENSE-2.0 .
-If they have been modified, the derivatives are copyright Glenn Randers-Pehson
+If they have been modified, the derivatives are copyright Glenn Randers-Pehrson
 and are released under the same licenses as the originals.  Several of
 the original files (libpng_read_fuzzer.options, png.dict, project.yaml)
 had no licensing information; we assumed that these were under the Chromium
@@ -23,10 +23,15 @@ The files are
                             Original
  Filename                   or derived   Copyright          License
  =========================  ==========   ================   ==========
- build.sh                   derived      2017, Glenn R-P    Apache 2.0
+ Dockerfile*                derived      2017, Glenn R-P    Apache 2.0
+ build.sh*                  derived      2017, Glenn R-P    Apache 2.0
  libpng_read_fuzzer.cc      derived      2017, Glenn R-P    Chromium
  libpng_read_fuzzer.options original     2015, Chrome Devs  Chromium
  png.dict                   original     2015, Chrome Devs  Chromium
- README.txt (this file)     original     2017, GLenn R-P    libpng
+ README.txt (this file)     original     2017, Glenn R-P    libpng
 
-To do: exercise the progressive reader.
+ * Dockerfile and build.sh are copies of the files used by oss-fuzz.
+   png.dict and libpng_read_fuzzer.* are the actual files used by oss-fuzz,
+   which retrieves them from the libpng repository at Github.
+
+To do: exercise the progressive reader and the png encoder.
diff --git a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/build.sh b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/build.sh
index cf5a9dad507..d2137b13e70 100755
--- a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/build.sh
+++ b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/build.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-# Last changed in libpng 1.6.32 [August 24, 2017]
+# Last changed in libpng 1.6.33 [September 28, 2017]
 #
 # Revisions by Glenn Randers-Pehson, 2017:
 # 1. Build only the library, not the tools (changed "make -j$(nproc) all" to
@@ -38,10 +38,13 @@ make -j$(nproc) libpng16.la
 
 # build libpng_read_fuzzer.
 $CXX $CXXFLAGS -std=c++11 -I. \
-     $SRC/libpng_read_fuzzer.cc -o $OUT/libpng_read_fuzzer \
+     $SRC/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc \
+     -o $OUT/libpng_read_fuzzer \
      -lFuzzingEngine .libs/libpng16.a -lz
 
 # add seed corpus.
-find $SRC/libpng/contrib/pngsuite -name "*.png" | xargs zip $OUT/libpng_read_fuzzer_seed_corpus.zip
+find $SRC/libpng -name "*.png" | grep -v crashers | \
+     xargs zip $OUT/libpng_read_fuzzer_seed_corpus.zip
 
-cp $SRC/*.dict $SRC/*.options $OUT/
+cp $SRC/libpng/contrib/oss-fuzz/*.dict \
+     $SRC/libpng/contrib/oss-fuzz/*.options $OUT/
diff --git a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/libpng_read_fuzzer.cc b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/libpng_read_fuzzer.cc
index c1b16249db0..78c7c9ff096 100644
--- a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/libpng_read_fuzzer.cc
+++ b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/libpng_read_fuzzer.cc
@@ -12,6 +12,7 @@
 // 2. setting the option to ignore ADLER32 checksums,
 // 3. adding "#include <string.h>" which is needed on some platforms
 //    to provide memcpy().
+// 4. adding read_end_info() and creating an end_info structure.
 
 #include <stddef.h>
 #include <stdint.h>
@@ -23,14 +24,23 @@
 #include "png.h"
 
 #define PNG_CLEANUP \
-    if(png_handler.png_ptr) \
-    { \
-      if (png_handler.info_ptr) \
-        png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\
-          nullptr); \
-      else \
-        png_destroy_read_struct(&png_handler.png_ptr, nullptr, nullptr); \
-     }
+  if(png_handler.png_ptr) \
+  { \
+    if (png_handler.row_ptr) \
+      png_free(png_handler.png_ptr, png_handler.row_ptr); \
+    if (png_handler.end_info_ptr) \
+      png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\
+        &png_handler.end_info_ptr); \
+    else if (png_handler.info_ptr) \
+      png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\
+        nullptr); \
+    else \
+      png_destroy_read_struct(&png_handler.png_ptr, nullptr, nullptr); \
+    png_handler.png_ptr = nullptr; \
+    png_handler.row_ptr = nullptr; \
+    png_handler.info_ptr = nullptr; \
+    png_handler.end_info_ptr = nullptr; \
+  }
 
 struct BufState {
   const uint8_t* data;
@@ -40,16 +50,19 @@ struct BufState {
 struct PngObjectHandler {
   png_infop info_ptr = nullptr;
   png_structp png_ptr = nullptr;
+  png_infop end_info_ptr = nullptr;
   png_voidp row_ptr = nullptr;
   BufState* buf_state = nullptr;
 
   ~PngObjectHandler() {
-    if (row_ptr && png_ptr) {
+    if (row_ptr)
       png_free(png_ptr, row_ptr);
-    }
-    if (png_ptr && info_ptr) {
+    if (end_info_ptr)
+      png_destroy_read_struct(&png_ptr, &info_ptr, &end_info_ptr);
+    else if (info_ptr) 
       png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
-    }
+    else
+      png_destroy_read_struct(&png_ptr, nullptr, nullptr);
     delete buf_state;
   }
 };
@@ -81,6 +94,11 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   }
 
   PngObjectHandler png_handler;
+  png_handler.png_ptr = nullptr;
+  png_handler.row_ptr = nullptr;
+  png_handler.info_ptr = nullptr;
+  png_handler.end_info_ptr = nullptr;
+
   png_handler.png_ptr = png_create_read_struct
     (PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
   if (!png_handler.png_ptr) {
@@ -93,6 +111,12 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     return 0;
   }
 
+  png_handler.end_info_ptr = png_create_info_struct(png_handler.png_ptr);
+  if (!png_handler.end_info_ptr) {
+    PNG_CLEANUP
+    return 0;
+  }
+
   png_set_crc_action(png_handler.png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
 #ifdef PNG_IGNORE_ADLER32
   png_set_option(png_handler.png_ptr, PNG_IGNORE_ADLER32, PNG_OPTION_ON);
@@ -149,6 +173,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     }
   }
 
+  png_read_end(png_handler.png_ptr, png_handler.end_info_ptr);
+
   PNG_CLEANUP
   return 0;
 }
diff --git a/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/newcc b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/newcc
new file mode 100644
index 00000000000..0fc9e206c21
--- /dev/null
+++ b/Build/source/libs/libpng/libpng-src/contrib/oss-fuzz/newcc
@@ -0,0 +1,190 @@
+
+// libpng_read_fuzzer.cc
+// Copyright 2017 Glenn Randers-Pehrson
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that may
+// be found in the LICENSE file https://cs.chromium.org/chromium/src/LICENSE
+
+// Last changed in libpng 1.6.33beta03 [September 27, 2017]
+
+// The modifications in 2017 by Glenn Randers-Pehrson include
+// 1. addition of a PNG_CLEANUP macro,
+// 2. setting the option to ignore ADLER32 checksums,
+// 3. adding "#include <string.h>" which is needed on some platforms
+//    to provide memcpy().
+// 4. adding read_end_info() and creating an end_info structure.
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <vector>
+
+#define PNG_INTERNAL
+#include "png.h"
+
+struct BufState {
+  const uint8_t* data;
+  size_t bytes_left;
+};
+
+struct PngObjectHandler {
+  png_infop info_ptr = nullptr;
+  png_structp png_ptr = nullptr;
+  png_infop end_info_ptr = nullptr;
+  png_voidp row_ptr = nullptr;
+  BufState* buf_state = nullptr;
+
+  ~PngObjectHandler() {
+    if (row_ptr)
+      png_free(png_ptr, row_ptr);
+    if (end_info_ptr)
+      png_destroy_read_struct(&png_ptr, &info_ptr, &end_info_ptr);
+    else if (info_ptr) 
+      png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
+    else
+      png_destroy_read_struct(&png_ptr, nullptr, nullptr);
+    delete buf_state;
+  }
+};
+
+void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length) {
+  BufState* buf_state = static_cast<BufState*>(png_get_io_ptr(png_ptr));
+  if (length > buf_state->bytes_left) {
+    png_error(png_ptr, "read error");
+  }
+  memcpy(data, buf_state->data, length);
+  buf_state->bytes_left -= length;
+  buf_state->data += length;
+}
+
+static const int kPngHeaderSize = 8;
+
+// Entry point for LibFuzzer.
+// Roughly follows the libpng book example:
+// http://www.libpng.org/pub/png/book/chapter13.html
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size < kPngHeaderSize) {
+    return 0;
+  }
+
+  std::vector<unsigned char> v(data, data + size);
+  if (png_sig_cmp(v.data(), 0, kPngHeaderSize)) {
+    // not a PNG.
+    return 0;
+  }
+
+  PngObjectHandler png_handler;
+  png_handler.png_ptr = nullptr;
+  png_handler.row_ptr = nullptr;
+  png_handler.info_ptr = nullptr;
+  png_handler.end_info_ptr = nullptr;
+
+  png_handler.png_ptr = png_create_read_struct
+    (PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
+  if (!png_handler.png_ptr) {
+    return 0;
+  }
+
+#define PNG_CLEANUP \
+  if(png_handler.png_ptr) \
+  { \
+    if (png_handler.row_ptr) \
+      png_free(png_handler.png_ptr, png_handler.row_ptr); \
+    if (png_handler.end_info_ptr) \
+      png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\
+        &png_handler.end_info_ptr); \
+    else if (png_handler.info_ptr) \
+      png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\
+        nullptr); \
+    else \
+      png_destroy_read_struct(&png_handler.png_ptr, nullptr, nullptr); \
+    png_handler.png_ptr = nullptr; \
+    png_handler.row_ptr = nullptr; \
+    png_handler.info_ptr = nullptr; \
+    png_handler.end_info_ptr = nullptr; \
+  }
+
+  png_handler.info_ptr = png_create_info_struct(png_handler.png_ptr);
+  if (!png_handler.info_ptr) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  png_handler.end_info_ptr = png_create_info_struct(png_handler.png_ptr);
+  if (!png_handler.end_info_ptr) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  /* Treat benign errors as warnings */
+  png_set_benign_errors(png_handler.png_ptr, 1);
+
+  png_set_crc_action(png_handler.png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
+
+#ifdef PNG_IGNORE_ADLER32
+  png_set_option(png_handler.png_ptr, PNG_IGNORE_ADLER32, PNG_OPTION_ON);
+#endif
+
+  // Setting up reading from buffer.
+  png_handler.buf_state = new BufState();
+  png_handler.buf_state->data = data + kPngHeaderSize;
+  png_handler.buf_state->bytes_left = size - kPngHeaderSize;
+  png_set_read_fn(png_handler.png_ptr, png_handler.buf_state, user_read_data);
+  png_set_sig_bytes(png_handler.png_ptr, kPngHeaderSize);
+
+  if (setjmp(png_jmpbuf(png_handler.png_ptr))) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  // Reading.
+  png_read_info(png_handler.png_ptr, png_handler.info_ptr);
+  png_read_update_info(png_handler.png_ptr, png_handler.info_ptr);
+  png_handler.row_ptr = png_malloc(
+      png_handler.png_ptr, png_get_rowbytes(png_handler.png_ptr,
+                                               png_handler.info_ptr));
+
+  // reset error handler to put png_deleter into scope.
+  if (setjmp(png_jmpbuf(png_handler.png_ptr))) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  png_uint_32 width, height;
+  int bit_depth, color_type, interlace_type, compression_type;
+  int filter_type;
+
+  if (!png_get_IHDR(png_handler.png_ptr, png_handler.info_ptr, &width,
+                    &height, &bit_depth, &color_type, &interlace_type,
+                    &compression_type, &filter_type)) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  // This is going to be too slow.
+  if (width && height > 100000000 / width) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  int passes = png_set_interlace_handling(png_handler.png_ptr);
+  png_start_read_image(png_handler.png_ptr);
+
+  /* To do: prevent the optimizer from removing this code entirely */
+  for (int pass = 0; pass < passes; ++pass) {
+    for (png_uint_32 y = 0; y < height; ++y) {
+      png_read_row(png_handler.png_ptr,
+                   static_cast<png_bytep>(png_handler.row_ptr), nullptr);
+    }
+  }
+
+  png_read_end(png_handler.png_ptr, png_handler.end_info_ptr);
+
+  PNG_CLEANUP
+
+  /* TO do: exercise the progressive reader here */
+
+  return 0;
+}
diff --git a/Build/source/libs/libpng/libpng-src/contrib/pngminus/png2pnm.c b/Build/source/libs/libpng/libpng-src/contrib/pngminus/png2pnm.c
index 39a9f4673c0..1420a783b03 100644
--- a/Build/source/libs/libpng/libpng-src/contrib/pngminus/png2pnm.c
+++ b/Build/source/libs/libpng/libpng-src/contrib/pngminus/png2pnm.c
@@ -5,7 +5,8 @@
  *  version 1.0 - 1999.10.15 - First version.
  *          1.1 - 2017.04.22 - Add buffer-size check (Glenn Randers-Pehrson)
  *          1.2 - 2017.08.24 - Fix potential overflow in buffer-size check
-                               (Glenn Randers-Pehrson)
+ *                             (Glenn Randers-Pehrson)
+ *          1.3 - 2017.08.28 - Add PNGMINUS_UNUSED (Christian Hesse)
  *
  *  Permission to use, copy, modify, and distribute this software and
  *  its documentation for any purpose and without fee is hereby granted,
@@ -44,6 +45,7 @@
 #define PNG_DEBUG 0
 #endif
 
+
 #include "png.h"
 
 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
@@ -51,6 +53,14 @@
 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
 #endif
 
+#ifndef PNGMINUS_UNUSED
+/* Unused formal parameter warnings are silenced using the following macro
+ * which is expected to have no bad effects on performance (optimizing
+ * compilers will probably remove it entirely).
+ */
+#  define PNGMINUS_UNUSED(param) (void)param
+#endif
+
 /* function prototypes */
 
 int  main (int argc, char *argv[]);
@@ -443,7 +453,7 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file,
   if (png_pixels != (unsigned char*) NULL)
     free (png_pixels);
 
-  PNG_UNUSED(raw) /* to quiet a Coverity defect */
+  PNGMINUS_UNUSED(raw); /* to quiet a Coverity defect */
   return TRUE;
 
 } /* end of source */
diff --git a/Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c b/Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c
index 1b550b8cf82..0d2caef960b 100644
--- a/Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c
+++ b/Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c
@@ -7,6 +7,7 @@
  *  version 1.2 - 2017.04.22 - Add buffer-size check
  *          1.3 - 2017.08.24 - Fix potential overflow in buffer-size check
  *                             (Glenn Randers-Pehrson)
+ *          1.4 - 2017.08.28 - Add PNGMINUS_UNUSED (Christian Hesse)
  *
  *  Permission to use, copy, modify, and distribute this software and
  *  its documentation for any purpose and without fee is hereby granted,
@@ -50,6 +51,15 @@
 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
 #endif
 
+#ifndef PNGMINUS_UNUSED
+/* Unused formal parameter warnings are silenced using the following macro
+ * which is expected to have no bad effects on performance (optimizing
+ * compilers will probably remove it entirely).
+ */
+#  define PNGMINUS_UNUSED(param) (void)param
+#endif
+
+
 /* function prototypes */
 
 int  main (int argc, char *argv[]);
@@ -376,13 +386,13 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
   /* row_bytes is the width x number of channels x (bit-depth / 8) */
     row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2);
 
-  if ((row_bytes == 0 || (size_t)height > ((size_t)(-1))/(size_t)row_bytes)
+  if ((row_bytes == 0 || (size_t)height > ((size_t)(-1))/(size_t)row_bytes))
   {
     /* too big */ 
     return FALSE;
   }
   if ((png_pixels = (png_byte *)
-     malloc (row_bytes * height * sizeof (png_byte))) == NULL)
+     malloc ((size_t)row_bytes * (size_t)height * sizeof (png_byte))) == NULL)
     return FALSE;
 
   /* read data from PNM file */
@@ -513,7 +523,7 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
   if (png_pixels != (unsigned char*) NULL)
     free (png_pixels);
 
-  PNG_UNUSED(raw) /* Quiet a Coverity defect */
+  PNGMINUS_UNUSED(raw); /* Quiet a Coverity defect */
 
   return TRUE;
 } /* end of pnm2png */
diff --git a/Build/source/libs/libpng/libpng-src/libpng-manual.txt b/Build/source/libs/libpng/libpng-src/libpng-manual.txt
index e34b1436f55..d4407ef2ea0 100644
--- a/Build/source/libs/libpng/libpng-src/libpng-manual.txt
+++ b/Build/source/libs/libpng/libpng-src/libpng-manual.txt
@@ -1,6 +1,6 @@
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.6.32 - August 24, 2017
+ libpng version 1.6.34 - September 29, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.6.32 - August 24, 2017
+ libpng versions 0.97, January 1998, through 1.6.34 - September 29, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
 
@@ -986,8 +986,17 @@ premultiplication.
 
     png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB);
 
-This is the default libpng handling of the alpha channel - it is not
-pre-multiplied into the color components.  In addition the call states
+Choices for the alpha_mode are
+
+    PNG_ALPHA_PNG           0 /* according to the PNG standard */
+    PNG_ALPHA_STANDARD      1 /* according to Porter/Duff */
+    PNG_ALPHA_ASSOCIATED    1 /* as above; this is the normal practice */
+    PNG_ALPHA_PREMULTIPLIED 1 /* as above */
+    PNG_ALPHA_OPTIMIZED     2 /* 'PNG' for opaque pixels, else 'STANDARD' */
+    PNG_ALPHA_BROKEN        3 /* the alpha channel is gamma encoded */
+
+PNG_ALPHA_PNG is the default libpng handling of the alpha channel. It is not
+pre-multiplied into the color components. In addition the call states
 that the output is for a sRGB system and causes all PNG files without gAMA
 chunks to be assumed to be encoded using sRGB.
 
@@ -1002,7 +1011,7 @@ early Mac systems behaved.
 This is the classic Jim Blinn approach and will work in academic
 environments where everything is done by the book.  It has the shortcoming
 of assuming that input PNG data with no gamma information is linear - this
-is unlikely to be correct unless the PNG files where generated locally.
+is unlikely to be correct unless the PNG files were generated locally.
 Most of the time the output precision will be so low as to show
 significant banding in dark areas of the image.
 
@@ -5405,7 +5414,7 @@ Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.32 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.34 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has two year fields.  One is a 2-byte unsigned integer
diff --git a/Build/source/libs/libpng/libpng-src/libpng.3 b/Build/source/libs/libpng/libpng-src/libpng.3
index 899d8eacc63..3c8d62ab29d 100644
--- a/Build/source/libs/libpng/libpng-src/libpng.3
+++ b/Build/source/libs/libpng/libpng-src/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "August 24, 2017"
+.TH LIBPNG 3 "September 29, 2017"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.32
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.34
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -518,7 +518,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.6.32 - August 24, 2017
+ libpng version 1.6.34 - September 29, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -529,7 +529,7 @@ libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.6.32 - August 24, 2017
+ libpng versions 0.97, January 1998, through 1.6.34 - September 29, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
 
@@ -1504,8 +1504,17 @@ premultiplication.
 
     png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB);
 
-This is the default libpng handling of the alpha channel - it is not
-pre-multiplied into the color components.  In addition the call states
+Choices for the alpha_mode are
+
+    PNG_ALPHA_PNG           0 /* according to the PNG standard */
+    PNG_ALPHA_STANDARD      1 /* according to Porter/Duff */
+    PNG_ALPHA_ASSOCIATED    1 /* as above; this is the normal practice */
+    PNG_ALPHA_PREMULTIPLIED 1 /* as above */
+    PNG_ALPHA_OPTIMIZED     2 /* 'PNG' for opaque pixels, else 'STANDARD' */
+    PNG_ALPHA_BROKEN        3 /* the alpha channel is gamma encoded */
+
+PNG_ALPHA_PNG is the default libpng handling of the alpha channel. It is not
+pre-multiplied into the color components. In addition the call states
 that the output is for a sRGB system and causes all PNG files without gAMA
 chunks to be assumed to be encoded using sRGB.
 
@@ -1520,7 +1529,7 @@ early Mac systems behaved.
 This is the classic Jim Blinn approach and will work in academic
 environments where everything is done by the book.  It has the shortcoming
 of assuming that input PNG data with no gamma information is linear - this
-is unlikely to be correct unless the PNG files where generated locally.
+is unlikely to be correct unless the PNG files were generated locally.
 Most of the time the output precision will be so low as to show
 significant banding in dark areas of the image.
 
@@ -5923,7 +5932,7 @@ Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.32 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.34 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -6021,11 +6030,11 @@ the first widely used release:
  ...
  1.0.19                  10    10019  10.so.0.19[.0]
  ...
- 1.2.57                  13    10257  12.so.0.56[.0]
+ 1.2.59                  13    10259  12.so.0.59[.0]
  ...
- 1.5.28                  15    10528  15.so.15.28[.0]
+ 1.5.30                  15    10530  15.so.15.30[.0]
  ...
- 1.6.32                  16    10632  16.so.16.32[.0]
+ 1.6.34                  16    10634  16.so.16.34[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -6081,7 +6090,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.6.32 - August 24, 2017:
+Libpng version 1.6.34 - September 29, 2017:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -6106,7 +6115,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000 through 1.6.32, August 24, 2017 are
+libpng versions 1.0.7, July 1, 2000 through 1.6.34, September 29, 2017 are
 Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -6234,7 +6243,7 @@ files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-August 24, 2017
+September 29, 2017
 
 .\" end of man page
 
diff --git a/Build/source/libs/libpng/libpng-src/libpngpf.3 b/Build/source/libs/libpng/libpng-src/libpngpf.3
index ab84577e409..8cea87a7173 100644
--- a/Build/source/libs/libpng/libpng-src/libpngpf.3
+++ b/Build/source/libs/libpng/libpng-src/libpngpf.3
@@ -1,6 +1,6 @@
 .TH LIBPNGPF 3 "April 1, 2017"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.32
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.34
 (private functions)
 .SH SYNOPSIS
 \fB\fB#include \fI\fI"pngpriv.h"
diff --git a/Build/source/libs/libpng/libpng-src/png.c b/Build/source/libs/libpng/libpng-src/png.c
index 2352df13cba..ff02c56518c 100644
--- a/Build/source/libs/libpng/libpng-src/png.c
+++ b/Build/source/libs/libpng/libpng-src/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.6.32 [August 24, 2017]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -14,7 +14,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_32 Your_png_h_is_not_version_1_6_32;
+typedef png_libpng_version_1_6_34 Your_png_h_is_not_version_1_6_34;
 
 #ifdef __GNUC__
 /* The version tests may need to be added to, but the problem warning has
@@ -816,14 +816,14 @@ png_get_copyright(png_const_structrp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-      "libpng version 1.6.32 - August 24, 2017" PNG_STRING_NEWLINE \
+      "libpng version 1.6.34 - September 29, 2017" PNG_STRING_NEWLINE \
       "Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \
       PNG_STRING_NEWLINE \
       "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
       "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
       PNG_STRING_NEWLINE;
 #  else
-   return "libpng version 1.6.32 - August 24, 2017\
+   return "libpng version 1.6.34 - September 29, 2017\
       Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -1913,12 +1913,12 @@ png_colorspace_set_sRGB(png_const_structrp png_ptr, png_colorspacerp colorspace,
     */
    if (intent < 0 || intent >= PNG_sRGB_INTENT_LAST)
       return png_icc_profile_error(png_ptr, colorspace, "sRGB",
-          (unsigned)intent, "invalid sRGB rendering intent");
+          (png_alloc_size_t)intent, "invalid sRGB rendering intent");
 
    if ((colorspace->flags & PNG_COLORSPACE_HAVE_INTENT) != 0 &&
        colorspace->rendering_intent != intent)
       return png_icc_profile_error(png_ptr, colorspace, "sRGB",
-         (unsigned)intent, "inconsistent rendering intents");
+         (png_alloc_size_t)intent, "inconsistent rendering intents");
 
    if ((colorspace->flags & PNG_COLORSPACE_FROM_sRGB) != 0)
    {
@@ -1979,7 +1979,6 @@ icc_check_length(png_const_structrp png_ptr, png_colorspacerp colorspace,
    if (profile_length < 132)
       return png_icc_profile_error(png_ptr, colorspace, name, profile_length,
           "too short");
-
    return 1;
 }
 
@@ -2224,22 +2223,23 @@ png_icc_check_tag_table(png_const_structrp png_ptr, png_colorspacerp colorspace,
        * being in range.  All defined tag types have an 8 byte header - a 4 byte
        * type signature then 0.
        */
+
+      /* This is a hard error; potentially it can cause read outside the
+       * profile.
+       */
+      if (tag_start > profile_length || tag_length > profile_length - tag_start)
+         return png_icc_profile_error(png_ptr, colorspace, name, tag_id,
+             "ICC profile tag outside profile");
+
       if ((tag_start & 3) != 0)
       {
-         /* CNHP730S.icc shipped with Microsoft Windows 64 violates this, it is
+         /* CNHP730S.icc shipped with Microsoft Windows 64 violates this; it is
           * only a warning here because libpng does not care about the
           * alignment.
           */
          (void)png_icc_profile_error(png_ptr, NULL, name, tag_id,
              "ICC profile tag start not a multiple of 4");
       }
-
-      /* This is a hard error; potentially it can cause read outside the
-       * profile.
-       */
-      if (tag_start > profile_length || tag_length > profile_length - tag_start)
-         return png_icc_profile_error(png_ptr, colorspace, name, tag_id,
-             "ICC profile tag outside profile");
    }
 
    return 1; /* success, maybe with warnings */
@@ -3761,7 +3761,7 @@ png_log16bit(png_uint_32 x)
  * 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
+ * fractional 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
diff --git a/Build/source/libs/libpng/libpng-src/png.h b/Build/source/libs/libpng/libpng-src/png.h
index 51ac8abe747..4c873f5c22e 100644
--- a/Build/source/libs/libpng/libpng-src/png.h
+++ b/Build/source/libs/libpng/libpng-src/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.6.32, August 24, 2017
+ * libpng version 1.6.34, September 29, 2017
  *
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.6.32, August 24, 2017:
+ *   libpng versions 0.97, January 1998, through 1.6.34, September 29, 2017:
  *     Glenn Randers-Pehrson.
  *   See also "Contributing Authors", below.
  */
@@ -25,7 +25,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.0.7, July 1, 2000 through 1.6.32, August 24, 2017 are
+ * libpng versions 1.0.7, July 1, 2000 through 1.6.34, September 29, 2017 are
  * Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
  * derived from libpng-1.0.6, and are distributed according to the same
  * disclaimer and license as libpng-1.0.6 with the following individuals
@@ -209,11 +209,11 @@
  *    ...
  *    1.0.19                  10    10019  10.so.0.19[.0]
  *    ...
- *    1.2.57                  13    10257  12.so.0.57[.0]
+ *    1.2.59                  13    10257  12.so.0.59[.0]
  *    ...
- *    1.5.28                  15    10527  15.so.15.28[.0]
+ *    1.5.30                  15    10527  15.so.15.30[.0]
  *    ...
- *    1.6.32                  16    10632  16.so.16.32[.0]
+ *    1.6.34                  16    10633  16.so.16.34[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -241,13 +241,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    August 24, 2017
+ *    September 29, 2017
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.6.32 are Y2K compliant.  It is my belief that
+ *    upward through 1.6.34 are Y2K compliant.  It is my belief that
  *    earlier versions were also Y2K compliant.
  *
  *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -309,8 +309,8 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.32"
-#define PNG_HEADER_VERSION_STRING " libpng version 1.6.32 - August 24, 2017\n"
+#define PNG_LIBPNG_VER_STRING "1.6.34"
+#define PNG_HEADER_VERSION_STRING " libpng version 1.6.34 - September 29, 2017\n"
 
 #define PNG_LIBPNG_VER_SONUM   16
 #define PNG_LIBPNG_VER_DLLNUM  16
@@ -318,7 +318,7 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   6
-#define PNG_LIBPNG_VER_RELEASE 32
+#define PNG_LIBPNG_VER_RELEASE 34
 
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
@@ -349,7 +349,7 @@
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release
  */
-#define PNG_LIBPNG_VER 10632 /* 1.6.32 */
+#define PNG_LIBPNG_VER 10634 /* 1.6.34 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
@@ -459,7 +459,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char* png_libpng_version_1_6_32;
+typedef char* png_libpng_version_1_6_34;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
@@ -2819,6 +2819,8 @@ typedef struct
 #  define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */
 #endif
 
+#define PNG_FORMAT_FLAG_ASSOCIATED_ALPHA 0x40U /* alpha channel is associated */
+
 /* Commonly used formats have predefined macros.
  *
  * First the single byte (sRGB) formats:
diff --git a/Build/source/libs/libpng/libpng-src/pngconf.h b/Build/source/libs/libpng/libpng-src/pngconf.h
index c0f15547be4..d13b13e57ae 100644
--- a/Build/source/libs/libpng/libpng-src/pngconf.h
+++ b/Build/source/libs/libpng/libpng-src/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.6.32, August 24, 2017
+ * libpng version 1.6.34, September 29, 2017
  *
  * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/Build/source/libs/libpng/libpng-src/pnglibconf.h b/Build/source/libs/libpng/libpng-src/pnglibconf.h
index 9e45f73129a..53b5e442c4b 100644
--- a/Build/source/libs/libpng/libpng-src/pnglibconf.h
+++ b/Build/source/libs/libpng/libpng-src/pnglibconf.h
@@ -1,8 +1,8 @@
-/* libpng 1.6.32 STANDARD API DEFINITION */
+/* libpng 1.6.34 STANDARD API DEFINITION */
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng version 1.6.32 - August 24, 2017 */
+/* Libpng version 1.6.34 - September 29, 2017 */
 
 /* Copyright (c) 1998-2017 Glenn Randers-Pehrson */
 
diff --git a/Build/source/libs/libpng/libpng-src/pngread.c b/Build/source/libs/libpng/libpng-src/pngread.c
index e34ddd99a08..da32e9ad9ce 100644
--- a/Build/source/libs/libpng/libpng-src/pngread.c
+++ b/Build/source/libs/libpng/libpng-src/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.6.32 [August 24, 2017]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -3759,7 +3759,13 @@ png_image_read_direct(png_voidp argument)
          mode = PNG_ALPHA_PNG;
          output_gamma = PNG_DEFAULT_sRGB;
       }
-
+      
+      if ((change & PNG_FORMAT_FLAG_ASSOCIATED_ALPHA) != 0)
+      {
+         mode = PNG_ALPHA_OPTIMIZED;
+         change &= ~PNG_FORMAT_FLAG_ASSOCIATED_ALPHA;
+      }
+      
       /* If 'do_local_background' is set check for the presence of gamma
        * correction; this is part of the work-round for the libpng bug
        * described above.
@@ -3985,6 +3991,10 @@ png_image_read_direct(png_voidp argument)
       else if (do_local_compose != 0) /* internal error */
          png_error(png_ptr, "png_image_read: alpha channel lost");
 
+      if ((format & PNG_FORMAT_FLAG_ASSOCIATED_ALPHA) != 0) {
+         info_format |= PNG_FORMAT_FLAG_ASSOCIATED_ALPHA;
+      }
+
       if (info_ptr->bit_depth == 16)
          info_format |= PNG_FORMAT_FLAG_LINEAR;
 
diff --git a/Build/source/libs/libpng/libpng-src/pngrtran.c b/Build/source/libs/libpng/libpng-src/pngrtran.c
index 9a30ddf22bd..c1896503130 100644
--- a/Build/source/libs/libpng/libpng-src/pngrtran.c
+++ b/Build/source/libs/libpng/libpng-src/pngrtran.c
@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.6.31 [July 27, 2017]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -430,7 +430,7 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
       int i;
 
       png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr,
-          (png_uint_32)((png_uint_32)num_palette * (sizeof (png_byte))));
+          (png_alloc_size_t)((png_uint_32)num_palette * (sizeof (png_byte))));
       for (i = 0; i < num_palette; i++)
          png_ptr->quantize_index[i] = (png_byte)i;
    }
@@ -447,7 +447,7 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
 
          /* Initialize an array to sort colors */
          png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr,
-             (png_uint_32)((png_uint_32)num_palette * (sizeof (png_byte))));
+             (png_alloc_size_t)((png_uint_32)num_palette * (sizeof (png_byte))));
 
          /* Initialize the quantize_sort array */
          for (i = 0; i < num_palette; i++)
@@ -581,9 +581,11 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
 
          /* Initialize palette index arrays */
          png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
-             (png_uint_32)((png_uint_32)num_palette * (sizeof (png_byte))));
+             (png_alloc_size_t)((png_uint_32)num_palette *
+             (sizeof (png_byte))));
          png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
-             (png_uint_32)((png_uint_32)num_palette * (sizeof (png_byte))));
+             (png_alloc_size_t)((png_uint_32)num_palette *
+             (sizeof (png_byte))));
 
          /* Initialize the sort array */
          for (i = 0; i < num_palette; i++)
@@ -592,7 +594,7 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
             png_ptr->palette_to_index[i] = (png_byte)i;
          }
 
-         hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 *
+         hash = (png_dsortpp)png_calloc(png_ptr, (png_alloc_size_t)(769 *
              (sizeof (png_dsortp))));
 
          num_new_palette = num_palette;
@@ -623,7 +625,7 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
                   {
 
                      t = (png_dsortp)png_malloc_warn(png_ptr,
-                         (png_uint_32)(sizeof (png_dsort)));
+                         (png_alloc_size_t)(sizeof (png_dsort)));
 
                      if (t == NULL)
                          break;
@@ -748,9 +750,9 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
       png_size_t num_entries = ((png_size_t)1 << total_bits);
 
       png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr,
-          (png_uint_32)(num_entries * (sizeof (png_byte))));
+          (png_alloc_size_t)(num_entries * (sizeof (png_byte))));
 
-      distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries *
+      distance = (png_bytep)png_malloc(png_ptr, (png_alloc_size_t)(num_entries *
           (sizeof (png_byte))));
 
       memset(distance, 0xff, num_entries * (sizeof (png_byte)));
@@ -3322,7 +3324,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
                             == png_ptr->trans_color.gray)
                         {
                            unsigned int tmp = *sp & (0x0f0f >> (4 - shift));
-                           tmp |= 
+                           tmp |=
                               (unsigned int)(png_ptr->background.gray << shift);
                            *sp = (png_byte)(tmp & 0xff);
                         }
diff --git a/Build/source/libs/libpng/libpng-src/pngrutil.c b/Build/source/libs/libpng/libpng-src/pngrutil.c
index a4fa71457b9..8692933bd8b 100644
--- a/Build/source/libs/libpng/libpng-src/pngrutil.c
+++ b/Build/source/libs/libpng/libpng-src/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.6.32 [August 24, 2017]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -314,6 +314,7 @@ png_read_buffer(png_structrp png_ptr, png_alloc_size_t new_size, int warn)
 
       if (buffer != NULL)
       {
+         memset(buffer, 0, new_size); /* just in case */
          png_ptr->read_buffer = buffer;
          png_ptr->read_buffer_size = new_size;
       }
@@ -673,6 +674,8 @@ png_decompress_chunk(png_structrp png_ptr,
 
                if (text != NULL)
                {
+                  memset(text, 0, buffer_size);
+
                   ret = png_inflate(png_ptr, png_ptr->chunk_name, 1/*finish*/,
                       png_ptr->read_buffer + prefix_size, &lzsize,
                       text + prefix_size, newlength);
@@ -736,9 +739,7 @@ png_decompress_chunk(png_structrp png_ptr,
             {
                /* inflateReset failed, store the error message */
                png_zstream_error(png_ptr, ret);
-
-               if (ret == Z_STREAM_END)
-                  ret = PNG_UNEXPECTED_ZLIB_RETURN;
+               ret = PNG_UNEXPECTED_ZLIB_RETURN;
             }
          }
 
@@ -1476,7 +1477,7 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
                         /* Now read the tag table; a variable size buffer is
                          * needed at this point, allocate one for the whole
                          * profile.  The header check has already validated
-                         * that none of these stuff will overflow.
+                         * that none of this stuff will overflow.
                          */
                         const png_uint_32 tag_count = png_get_uint_32(
                             profile_header+128);
@@ -1583,19 +1584,11 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
                                        return;
                                     }
                                  }
-
-                                 else if (size > 0)
-                                    errmsg = "truncated";
-
-#ifndef __COVERITY__
-                                 else
+                                 if (errmsg == NULL)
                                     errmsg = png_ptr->zstream.msg;
-#endif
                               }
-
                               /* else png_icc_check_tag_table output an error */
                            }
-
                            else /* profile truncated */
                               errmsg = png_ptr->zstream.msg;
                         }
@@ -3144,28 +3137,28 @@ png_check_chunk_length(png_const_structrp png_ptr, const png_uint_32 length)
 {
    png_alloc_size_t limit = PNG_UINT_31_MAX;
 
-   if (png_ptr->chunk_name != png_IDAT)
-   {
 # ifdef PNG_SET_USER_LIMITS_SUPPORTED
-      if (png_ptr->user_chunk_malloc_max > 0 &&
-          png_ptr->user_chunk_malloc_max < limit)
-         limit = png_ptr->user_chunk_malloc_max;
+   if (png_ptr->user_chunk_malloc_max > 0 &&
+       png_ptr->user_chunk_malloc_max < limit)
+      limit = png_ptr->user_chunk_malloc_max;
 # elif PNG_USER_CHUNK_MALLOC_MAX > 0
-      if (PNG_USER_CHUNK_MALLOC_MAX < limit)
-         limit = PNG_USER_CHUNK_MALLOC_MAX;
+   if (PNG_USER_CHUNK_MALLOC_MAX < limit)
+      limit = PNG_USER_CHUNK_MALLOC_MAX;
 # endif
-   }
-   else
+   if (png_ptr->chunk_name == png_IDAT)
    {
+      png_alloc_size_t idat_limit = PNG_UINT_31_MAX;
       size_t row_factor =
          (png_ptr->width * png_ptr->channels * (png_ptr->bit_depth > 8? 2: 1)
           + 1 + (png_ptr->interlaced? 6: 0));
       if (png_ptr->height > PNG_UINT_32_MAX/row_factor)
-         limit=PNG_UINT_31_MAX;
+         idat_limit=PNG_UINT_31_MAX;
       else
-         limit = png_ptr->height * row_factor;
-      limit += 6 + 5*(limit/32566+1); /* zlib+deflate overhead */
-      limit=limit < PNG_UINT_31_MAX? limit : PNG_UINT_31_MAX;
+         idat_limit = png_ptr->height * row_factor;
+      row_factor = row_factor > 32566? 32566 : row_factor;
+      idat_limit += 6 + 5*(idat_limit/row_factor+1); /* zlib+deflate overhead */
+      idat_limit=idat_limit < PNG_UINT_31_MAX? idat_limit : PNG_UINT_31_MAX;
+      limit = limit < idat_limit? idat_limit : limit;
    }
 
    if (length > limit)
diff --git a/Build/source/libs/libpng/libpng-src/pngtest.c b/Build/source/libs/libpng/libpng-src/pngtest.c
index ce53345e13e..9d5075791f1 100644
--- a/Build/source/libs/libpng/libpng-src/pngtest.c
+++ b/Build/source/libs/libpng/libpng-src/pngtest.c
@@ -2153,4 +2153,4 @@ main(void)
 #endif
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_32 Your_png_h_is_not_version_1_6_32;
+typedef png_libpng_version_1_6_34 Your_png_h_is_not_version_1_6_34;
diff --git a/Build/source/libs/libpng/libpng-src/pngtrans.c b/Build/source/libs/libpng/libpng-src/pngtrans.c
index 326ac33f0e9..6882f0fd7b7 100644
--- a/Build/source/libs/libpng/libpng-src/pngtrans.c
+++ b/Build/source/libs/libpng/libpng-src/pngtrans.c
@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.6.30 [June 28, 2017]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -609,7 +609,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
       return; /* The filler channel has gone already */
 
    /* Fix the rowbytes value. */
-   row_info->rowbytes = (unsigned int)(dp-row);
+   row_info->rowbytes = (png_size_t)(dp-row);
 }
 #endif
 
@@ -708,7 +708,7 @@ png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
        * forms produced on either GCC or MSVC.
        */
       int padding = PNG_PADBITS(row_info->pixel_depth, row_info->width);
-      png_bytep rp = png_ptr->row_buf + row_info->rowbytes;
+      png_bytep rp = png_ptr->row_buf + row_info->rowbytes - 1;
 
       switch (row_info->bit_depth)
       {
diff --git a/Build/source/libs/libpng/libpng-src/pngwrite.c b/Build/source/libs/libpng/libpng-src/pngwrite.c
index a7662acb71c..a16d77ce00c 100644
--- a/Build/source/libs/libpng/libpng-src/pngwrite.c
+++ b/Build/source/libs/libpng/libpng-src/pngwrite.c
@@ -1940,7 +1940,7 @@ png_image_write_main(png_voidp argument)
    int colormap = (format & PNG_FORMAT_FLAG_COLORMAP);
    int linear = !colormap && (format & PNG_FORMAT_FLAG_LINEAR); /* input */
    int alpha = !colormap && (format & PNG_FORMAT_FLAG_ALPHA);
-   int write_16bit = linear && !colormap && (display->convert_to_8bit == 0);
+   int write_16bit = linear && (display->convert_to_8bit == 0);
 
 #   ifdef PNG_BENIGN_ERRORS_SUPPORTED
       /* Make sure we error out on any bad situation */
diff --git a/Build/source/libs/libpng/libpng-src/projects/vstudio/README.txt b/Build/source/libs/libpng/libpng-src/projects/vstudio/README.txt
index e68f242dac4..71d3ba23936 100644
--- a/Build/source/libs/libpng/libpng-src/projects/vstudio/README.txt
+++ b/Build/source/libs/libpng/libpng-src/projects/vstudio/README.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.6.32 - August 24, 2017
+libpng version 1.6.34 - September 29, 2017
 
 Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson
 
diff --git a/Build/source/libs/libpng/libpng-src/projects/vstudio/zlib.props b/Build/source/libs/libpng/libpng-src/projects/vstudio/zlib.props
index 2b2d69088c1..8e3682a26b4 100644
--- a/Build/source/libs/libpng/libpng-src/projects/vstudio/zlib.props
+++ b/Build/source/libs/libpng/libpng-src/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.6.32 - August 24, 2017
+ * libpng version 1.6.34 - September 29, 2017
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/Build/source/libs/libpng/libpng-src/scripts/README.txt b/Build/source/libs/libpng/libpng-src/scripts/README.txt
index fdc767a6d1d..793506e41fd 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/README.txt
+++ b/Build/source/libs/libpng/libpng-src/scripts/README.txt
@@ -1,11 +1,11 @@
 
-Makefiles for  libpng version 1.6.32 - August 24, 2017
+Makefiles for  libpng version 1.6.34 - September 29, 2017
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng16.so.16.1.6.32)
+                       (gcc, creates libpng16.so.16.1.6.34)
  makefile.linux-opt=>  Linux/ELF makefile with hardware optimizations on
-                       (gcc, creates libpng16.so.16.1.6.32)
+                       (gcc, creates libpng16.so.16.1.6.34)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -35,12 +35,12 @@ pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng16.so.16.1.6.32)
+                       creates libpng16.so.16.1.6.34)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng16.so.16.1.6.32)
+                       creates libpng16.so.16.1.6.34)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng16.so.16.1.6.32)
+                       creates libpng16.so.16.1.6.34)
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.sunos    =>  Sun makefile
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
diff --git a/Build/source/libs/libpng/libpng-src/scripts/def.c b/Build/source/libs/libpng/libpng-src/scripts/def.c
index d5c4075eb7e..23bdbad4efc 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/def.c
+++ b/Build/source/libs/libpng/libpng-src/scripts/def.c
@@ -21,7 +21,7 @@ PNG_DFN "OS2 DESCRIPTION "PNG image compression library""
 PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
 PNG_DFN ""
 PNG_DFN "EXPORTS"
-PNG_DFN ";Version 1.6.32"
+PNG_DFN ";Version 1.6.34"
 
 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
         PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"
diff --git a/Build/source/libs/libpng/libpng-src/scripts/libpng-config-head.in b/Build/source/libs/libpng/libpng-src/scripts/libpng-config-head.in
index 2198c523cae..64dd3987d18 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/libpng-config-head.in
+++ b/Build/source/libs/libpng/libpng-src/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.6.32
+version=1.6.34
 prefix=""
 libdir=""
 libs=""
diff --git a/Build/source/libs/libpng/libpng-src/scripts/libpng.pc.in b/Build/source/libs/libpng/libpng-src/scripts/libpng.pc.in
index ef506246d7e..33c65767bb6 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/libpng.pc.in
+++ b/Build/source/libs/libpng/libpng-src/scripts/libpng.pc.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng16
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.6.32
+Version: 1.6.34
 Libs: -L${libdir} -lpng16
 Cflags: -I${includedir}
diff --git a/Build/source/libs/libpng/libpng-src/scripts/makefile.cegcc b/Build/source/libs/libpng/libpng-src/scripts/makefile.cegcc
index 4a3e925f5ea..d85bed9ad07 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/makefile.cegcc
+++ b/Build/source/libs/libpng/libpng-src/scripts/makefile.cegcc
@@ -23,7 +23,7 @@
 
 VERMAJ = 1
 VERMIN = 6
-VERMIC = 32
+VERMIC = 34
 VER = $(VERMAJ).$(VERMIN).$(VERMIC)
 NAME = libpng
 PACKAGE = $(NAME)-$(VER)
diff --git a/Build/source/libs/libpng/libpng-src/scripts/makefile.linux b/Build/source/libs/libpng/libpng-src/scripts/makefile.linux
index 618cb2f1e1a..f61087ccf33 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/makefile.linux
+++ b/Build/source/libs/libpng/libpng-src/scripts/makefile.linux
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng16
 PNGMAJ = 16
-RELEASE = 32
+RELEASE = 34
 
 # Shared library names:
 LIBSO=$(LIBNAME).so
diff --git a/Build/source/libs/libpng/libpng-src/scripts/makefile.linux-opt b/Build/source/libs/libpng/libpng-src/scripts/makefile.linux-opt
index f75a787a413..017656c6e76 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/makefile.linux-opt
+++ b/Build/source/libs/libpng/libpng-src/scripts/makefile.linux-opt
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng16
 PNGMAJ = 16
-RELEASE = 32
+RELEASE = 34
 
 # Shared library names:
 LIBSO=$(LIBNAME).so
diff --git a/Build/source/libs/libpng/libpng-src/scripts/makefile.msys b/Build/source/libs/libpng/libpng-src/scripts/makefile.msys
index 84a894931d9..33b7721d437 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/makefile.msys
+++ b/Build/source/libs/libpng/libpng-src/scripts/makefile.msys
@@ -18,7 +18,7 @@ exec_prefix=$(prefix)
 # Library name:
 LIBNAME = libpng16
 PNGMAJ = 16
-RELEASE = 32
+RELEASE = 34
 
 # Shared library names:
 LIBSO=$(LIBNAME).dll
diff --git a/Build/source/libs/libpng/libpng-src/scripts/makefile.ne12bsd b/Build/source/libs/libpng/libpng-src/scripts/makefile.ne12bsd
index c04993fad6f..bc8dd8ba4dd 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/makefile.ne12bsd
+++ b/Build/source/libs/libpng/libpng-src/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include/libpng16
 
 LIB=	png16
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.6.32
+SHLIB_MINOR=	1.6.34
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/Build/source/libs/libpng/libpng-src/scripts/makefile.netbsd b/Build/source/libs/libpng/libpng-src/scripts/makefile.netbsd
index b52b94204c1..ab1cedda72d 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/makefile.netbsd
+++ b/Build/source/libs/libpng/libpng-src/scripts/makefile.netbsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include
 
 LIB=	png
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.32
+SHLIB_MINOR=	1.6.34
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/Build/source/libs/libpng/libpng-src/scripts/makefile.openbsd b/Build/source/libs/libpng/libpng-src/scripts/makefile.openbsd
index daec1096bd9..b32ea61a224 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/makefile.openbsd
+++ b/Build/source/libs/libpng/libpng-src/scripts/makefile.openbsd
@@ -11,7 +11,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.32
+SHLIB_MINOR=	1.6.34
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/Build/source/libs/libpng/libpng-src/scripts/pnglibconf.h.prebuilt b/Build/source/libs/libpng/libpng-src/scripts/pnglibconf.h.prebuilt
index 9e45f73129a..53b5e442c4b 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/pnglibconf.h.prebuilt
+++ b/Build/source/libs/libpng/libpng-src/scripts/pnglibconf.h.prebuilt
@@ -1,8 +1,8 @@
-/* libpng 1.6.32 STANDARD API DEFINITION */
+/* libpng 1.6.34 STANDARD API DEFINITION */
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng version 1.6.32 - August 24, 2017 */
+/* Libpng version 1.6.34 - September 29, 2017 */
 
 /* Copyright (c) 1998-2017 Glenn Randers-Pehrson */
 
diff --git a/Build/source/libs/libpng/libpng-src/scripts/symbols.def b/Build/source/libs/libpng/libpng-src/scripts/symbols.def
index 45bcf8912d0..519019014e4 100644
--- a/Build/source/libs/libpng/libpng-src/scripts/symbols.def
+++ b/Build/source/libs/libpng/libpng-src/scripts/symbols.def
@@ -1,4 +1,4 @@
-;Version 1.6.32
+;Version 1.6.34
 ;--------------------------------------------------------------
 ; LIBPNG symbol list as a Win32 DEF file
 ; Contains all the symbols that can be exported from libpng
diff --git a/Build/source/libs/libpng/version.ac b/Build/source/libs/libpng/version.ac
index 1db638e29b3..e11ab216e5d 100644
--- a/Build/source/libs/libpng/version.ac
+++ b/Build/source/libs/libpng/version.ac
@@ -8,4 +8,4 @@ dnl
 dnl --------------------------------------------------------
 dnl
 dnl  m4-include this file to define the current libpng version
-m4_define([libpng_version], [1.6.32])
+m4_define([libpng_version], [1.6.34])