[libpng16] Made progressive reading of interlaced images consistent with the
behavior of the sequential reader and consistent with the manual. The row_callback now receives the proper pass number and unexpanded rows, when png_combine_row is not used or not built, by moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks.
This commit is contained in:
parent
9f1aa186e6
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9
ANNOUNCE
9
ANNOUNCE
@ -1,5 +1,5 @@
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Libpng 1.6.11beta04 - April 6, 2014
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Libpng 1.6.11beta04 - April 13, 2014
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This is not intended to be a public release. It will be replaced
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within a few weeks by a public version or by another test version.
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@ -47,7 +47,12 @@ Version 1.6.11beta03 [April 6, 2014]
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Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes
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with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss).
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Version 1.6.11beta04 [April 6, 2014]
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Version 1.6.11beta04 [April 13, 2014]
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Made progressive reading of interlaced images consistent with the
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behavior of the sequential reader and consistent with the manual. The
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row_callback now receives the proper pass number and unexpanded rows,
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when png_combine_row is not used or not built, by moving some code
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out of the PNG_READ_INTERLACING_SUPPORTED blocks.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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7
CHANGES
7
CHANGES
@ -4898,7 +4898,12 @@ Version 1.6.11beta03 [April 6, 2014]
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with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss).
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Optionally use __builtin_bswap16() in png_do_swap().
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Version 1.6.11beta04 [April 10, 2014]
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Version 1.6.11beta04 [April 13, 2014]
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Made progressive reading of interlaced images consistent with the
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behavior of the sequential reader and consistent with the manual. The
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row_callback now receives the proper pass number and unexpanded rows,
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when png_combine_row is not used or not built, by moving some code
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out of the PNG_READ_INTERLACING_SUPPORTED blocks.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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|
@ -1,6 +1,6 @@
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libpng-manual.txt - A description on how to use and modify libpng
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libpng version 1.6.11beta04 - April 6, 2014
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libpng version 1.6.11beta04 - April 13, 2014
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Updated and distributed by Glenn Randers-Pehrson
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<glennrp at users.sourceforge.net>
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Copyright (c) 1998-2014 Glenn Randers-Pehrson
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@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
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Based on:
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libpng versions 0.97, January 1998, through 1.6.11beta04 - April 6, 2014
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libpng versions 0.97, January 1998, through 1.6.11beta04 - April 13, 2014
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Updated and distributed by Glenn Randers-Pehrson
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Copyright (c) 1998-2014 Glenn Randers-Pehrson
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@ -5076,16 +5076,16 @@ Libpng-1.6.0 through 1.6.2 used the CMF bytes at the beginning of the IDAT
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stream to set the size of the sliding window for reading instead of using the
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default 32-kbyte sliding window size. It was discovered that there are
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hundreds of PNG files in the wild that have incorrect CMF bytes that caused
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libpng to issue a "too far back" error and reject the file. Libpng-1.6.3 and
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later calculate their own safe CMF from the image dimensions, provide a way
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to revert to the libpng-1.5.x behavior (ignoring the CMF bytes and using a
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32-kbyte sliding window), by using
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zlib to issue the "invalid distance too far back" error and reject the file.
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Libpng-1.6.3 and later calculate their own safe CMF from the image dimensions,
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provide a way to revert to the libpng-1.5.x behavior (ignoring the CMF bytes
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and using a 32-kbyte sliding window), by using
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png_set_option(png_ptr, PNG_MAXIMUM_INFLATE_WINDOW,
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PNG_OPTION_ON);
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and provide a tool (contrib/tools/pngfix) for optimizing the CMF bytes
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correctly.
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and provide a tool (contrib/tools/pngfix) for rewriting a PNG file while
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optimizing the CMF bytes in its IDAT chunk correctly.
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Libpng-1.6.0 and libpng-1.6.1 wrote uncompressed iTXt chunks with the wrong
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length, which resulted in PNG files that cannot be read beyond the bad iTXt
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@ -5261,7 +5261,7 @@ Other rules can be inferred by inspecting the libpng source.
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XVI. Y2K Compliance in libpng
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April 6, 2014
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April 13, 2014
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Since the PNG Development group is an ad-hoc body, we can't make
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an official declaration.
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26
libpng.3
26
libpng.3
@ -1,4 +1,4 @@
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.TH LIBPNG 3 "April 6, 2014"
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.TH LIBPNG 3 "April 13, 2014"
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.SH NAME
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libpng \- Portable Network Graphics (PNG) Reference Library 1.6.11beta04
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.SH SYNOPSIS
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@ -504,7 +504,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
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.SH LIBPNG.TXT
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libpng-manual.txt - A description on how to use and modify libpng
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libpng version 1.6.11beta04 - April 6, 2014
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libpng version 1.6.11beta04 - April 13, 2014
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Updated and distributed by Glenn Randers-Pehrson
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<glennrp at users.sourceforge.net>
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Copyright (c) 1998-2014 Glenn Randers-Pehrson
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@ -515,7 +515,7 @@ libpng-manual.txt - A description on how to use and modify libpng
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Based on:
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libpng versions 0.97, January 1998, through 1.6.11beta04 - April 6, 2014
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libpng versions 0.97, January 1998, through 1.6.11beta04 - April 13, 2014
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Updated and distributed by Glenn Randers-Pehrson
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Copyright (c) 1998-2014 Glenn Randers-Pehrson
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@ -5580,16 +5580,16 @@ Libpng-1.6.0 through 1.6.2 used the CMF bytes at the beginning of the IDAT
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stream to set the size of the sliding window for reading instead of using the
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default 32-kbyte sliding window size. It was discovered that there are
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hundreds of PNG files in the wild that have incorrect CMF bytes that caused
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libpng to issue a "too far back" error and reject the file. Libpng-1.6.3 and
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later calculate their own safe CMF from the image dimensions, provide a way
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to revert to the libpng-1.5.x behavior (ignoring the CMF bytes and using a
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32-kbyte sliding window), by using
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zlib to issue the "invalid distance too far back" error and reject the file.
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Libpng-1.6.3 and later calculate their own safe CMF from the image dimensions,
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provide a way to revert to the libpng-1.5.x behavior (ignoring the CMF bytes
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and using a 32-kbyte sliding window), by using
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png_set_option(png_ptr, PNG_MAXIMUM_INFLATE_WINDOW,
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PNG_OPTION_ON);
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and provide a tool (contrib/tools/pngfix) for optimizing the CMF bytes
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correctly.
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and provide a tool (contrib/tools/pngfix) for rewriting a PNG file while
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optimizing the CMF bytes in its IDAT chunk correctly.
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Libpng-1.6.0 and libpng-1.6.1 wrote uncompressed iTXt chunks with the wrong
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length, which resulted in PNG files that cannot be read beyond the bad iTXt
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@ -5765,7 +5765,7 @@ Other rules can be inferred by inspecting the libpng source.
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.SH XVI. Y2K Compliance in libpng
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April 6, 2014
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April 13, 2014
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Since the PNG Development group is an ad-hoc body, we can't make
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an official declaration.
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@ -6062,7 +6062,7 @@ possible without all of you.
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Thanks to Frank J. T. Wojcik for helping with the documentation.
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Libpng version 1.6.11beta04 - April 6, 2014:
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Libpng version 1.6.11beta04 - April 13, 2014:
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Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
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Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
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@ -6085,7 +6085,7 @@ this sentence.
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This code is released under the libpng license.
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libpng versions 1.2.6, August 15, 2004, through 1.6.11beta04, April 6, 2014, are
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libpng versions 1.2.6, August 15, 2004, through 1.6.11beta04, April 13, 2014, are
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Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
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distributed according to the same disclaimer and license as libpng-1.2.5
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with the following individual added to the list of Contributing Authors
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@ -6184,7 +6184,7 @@ certification mark of the Open Source Initiative.
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Glenn Randers-Pehrson
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glennrp at users.sourceforge.net
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April 6, 2014
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April 13, 2014
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.\" end of man page
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4
png.c
4
png.c
@ -773,13 +773,13 @@ png_get_copyright(png_const_structrp png_ptr)
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#else
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# ifdef __STDC__
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return PNG_STRING_NEWLINE \
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"libpng version 1.6.11beta04 - April 6, 2014" PNG_STRING_NEWLINE \
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"libpng version 1.6.11beta04 - April 13, 2014" PNG_STRING_NEWLINE \
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"Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
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"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
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"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
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PNG_STRING_NEWLINE;
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# else
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return "libpng version 1.6.11beta04 - April 6, 2014\
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return "libpng version 1.6.11beta04 - April 13, 2014\
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Copyright (c) 1998-2014 Glenn Randers-Pehrson\
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Copyright (c) 1996-1997 Andreas Dilger\
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Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
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12
png.h
12
png.h
@ -1,7 +1,7 @@
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/* png.h - header file for PNG reference library
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*
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* libpng version 1.6.11beta04 - April 6, 2014
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* libpng version 1.6.11beta04 - April 13, 2014
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* Copyright (c) 1998-2014 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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@ -11,7 +11,7 @@
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* Authors and maintainers:
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* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
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* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
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* libpng versions 0.97, January 1998, through 1.6.11beta04 - April 6, 2014: Glenn
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* libpng versions 0.97, January 1998, through 1.6.11beta04 - April 13, 2014: Glenn
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* See also "Contributing Authors", below.
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*
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* Note about libpng version numbers:
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@ -227,7 +227,7 @@
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*
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* This code is released under the libpng license.
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*
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* libpng versions 1.2.6, August 15, 2004, through 1.6.11beta04, April 6, 2014, are
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* libpng versions 1.2.6, August 15, 2004, through 1.6.11beta04, April 13, 2014, are
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* Copyright (c) 2004, 2006-2013 Glenn Randers-Pehrson, and are
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* distributed according to the same disclaimer and license as libpng-1.2.5
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* with the following individual added to the list of Contributing Authors:
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@ -339,7 +339,7 @@
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* Y2K compliance in libpng:
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* =========================
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*
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* April 6, 2014
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* April 13, 2014
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*
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* Since the PNG Development group is an ad-hoc body, we can't make
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* an official declaration.
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@ -409,7 +409,7 @@
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/* Version information for png.h - this should match the version in png.c */
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#define PNG_LIBPNG_VER_STRING "1.6.11beta04"
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#define PNG_HEADER_VERSION_STRING \
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" libpng version 1.6.11beta04 - April 6, 2014\n"
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" libpng version 1.6.11beta04 - April 13, 2014\n"
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#define PNG_LIBPNG_VER_SONUM 16
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#define PNG_LIBPNG_VER_DLLNUM 16
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@ -1852,7 +1852,6 @@ PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save));
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*/
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PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp));
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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/* Function that combines rows. 'new_row' is a flag that should come from
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* the callback and be non-NULL if anything needs to be done; the library
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* stores its own version of the new data internally and ignores the passed
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@ -1860,7 +1859,6 @@ PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp));
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*/
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PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr,
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png_bytep old_row, png_const_bytep new_row));
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#endif /* PNG_READ_INTERLACING_SUPPORTED */
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#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
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PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr,
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@ -1154,7 +1154,6 @@ png_push_process_row(png_structrp png_ptr)
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}
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}
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else
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#endif
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{
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png_push_have_row(png_ptr, png_ptr->row_buf + 1);
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png_read_push_finish_row(png_ptr);
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@ -1164,7 +1163,6 @@ png_push_process_row(png_structrp png_ptr)
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void /* PRIVATE */
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png_read_push_finish_row(png_structrp png_ptr)
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{
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
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/* Start of interlace block */
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@ -1189,7 +1187,6 @@ png_read_push_finish_row(png_structrp png_ptr)
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if (png_ptr->row_number < png_ptr->num_rows)
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return;
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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if (png_ptr->interlaced)
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{
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png_ptr->row_number = 0;
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@ -1224,7 +1221,6 @@ png_read_push_finish_row(png_structrp png_ptr)
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} while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
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}
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#endif /* PNG_READ_INTERLACING_SUPPORTED */
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}
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void /* PRIVATE */
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@ -1249,7 +1245,6 @@ png_push_have_row(png_structrp png_ptr, png_bytep row)
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(int)png_ptr->pass);
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}
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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void PNGAPI
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png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
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png_const_bytep new_row)
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@ -1262,9 +1257,8 @@ png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
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* it must be png_ptr->row_buf+1
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*/
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if (new_row != NULL)
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png_combine_row(png_ptr, old_row, 1/*display*/);
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png_combine_row(png_ptr, old_row, 1/*blocky display*/);
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}
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#endif /* PNG_READ_INTERLACING_SUPPORTED */
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void PNGAPI
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png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr,
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10
pngrutil.c
10
pngrutil.c
@ -3464,7 +3464,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
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/* Here if pixel_depth < 8 to check 'end_ptr' below. */
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}
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else
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#endif
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#endif /* PNG_READ_INTERLACING_SUPPORTED */
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/* If here then the switch above wasn't used so just memcpy the whole row
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* from the temporary row buffer (notice that this overwrites the end of the
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@ -4114,7 +4114,6 @@ png_read_finish_IDAT(png_structrp png_ptr)
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void /* PRIVATE */
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png_read_finish_row(png_structrp png_ptr)
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{
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
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/* Start of interlace block */
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@ -4128,14 +4127,12 @@ png_read_finish_row(png_structrp png_ptr)
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/* Offset to next interlace block in the y direction */
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static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
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#endif /* PNG_READ_INTERLACING_SUPPORTED */
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png_debug(1, "in png_read_finish_row");
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png_ptr->row_number++;
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if (png_ptr->row_number < png_ptr->num_rows)
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return;
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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if (png_ptr->interlaced)
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{
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png_ptr->row_number = 0;
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@ -4173,7 +4170,6 @@ png_read_finish_row(png_structrp png_ptr)
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if (png_ptr->pass < 7)
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return;
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}
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#endif /* PNG_READ_INTERLACING_SUPPORTED */
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/* Here after at the end of the last row of the last pass. */
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png_read_finish_IDAT(png_ptr);
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@ -4183,7 +4179,6 @@ png_read_finish_row(png_structrp png_ptr)
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void /* PRIVATE */
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png_read_start_row(png_structrp png_ptr)
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{
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
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/* Start of interlace block */
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@ -4197,7 +4192,6 @@ png_read_start_row(png_structrp png_ptr)
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/* Offset to next interlace block in the y direction */
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static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
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#endif
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int max_pixel_depth;
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png_size_t row_bytes;
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@ -4207,7 +4201,6 @@ png_read_start_row(png_structrp png_ptr)
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#ifdef PNG_READ_TRANSFORMS_SUPPORTED
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png_init_read_transformations(png_ptr);
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#endif
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#ifdef PNG_READ_INTERLACING_SUPPORTED
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if (png_ptr->interlaced)
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{
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if (!(png_ptr->transformations & PNG_INTERLACE))
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@ -4224,7 +4217,6 @@ png_read_start_row(png_structrp png_ptr)
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}
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else
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#endif /* PNG_READ_INTERLACING_SUPPORTED */
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{
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png_ptr->num_rows = png_ptr->height;
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png_ptr->iwidth = png_ptr->width;
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|
Loading…
Reference in New Issue
Block a user