mirror of
https://github.com/GRRLIB/GRRLIB.git
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libpng updated to version 1.6.23.
This commit is contained in:
Crayon2000
parent
b2c6b93574
commit
33d044824b
22 changed files with 630 additions and 282 deletions
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@ -10,8 +10,8 @@ this sentence.
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This code is released under the libpng license.
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libpng versions 1.0.7, July 1, 2000, through 1.6.20, December 3, 2015, are
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Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, are
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libpng versions 1.0.7, July 1, 2000 through 1.6.23, June 9, 2016 are
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Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
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derived from libpng-1.0.6, and are distributed according to the same
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disclaimer and license as libpng-1.0.6 with the following individuals
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added to the list of Contributing Authors:
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@ -32,6 +32,10 @@ and with the following additions to the disclaimer:
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risk of satisfactory quality, performance, accuracy, and effort is with
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the user.
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||||
Some files in the "contrib" directory and some configure-generated
|
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files that are distributed with libpng have other copyright owners and
|
||||
are released under other open source licenses.
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libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
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Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
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libpng-0.96, and are distributed according to the same disclaimer and
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@ -55,6 +59,9 @@ Contributing Authors:
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Greg Roelofs
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Tom Tanner
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Some files in the "scripts" directory have other copyright owners
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but are released under this license.
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libpng versions 0.5, May 1995, through 0.88, January 1996, are
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Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
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@ -95,18 +102,29 @@ appreciated.
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END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
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A "png_get_copyright" function is available, for convenient use in "about"
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boxes and the like:
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TRADEMARK:
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printf("%s", png_get_copyright(NULL));
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The name "libpng" has not been registered by the Copyright owner
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as a trademark in any jurisdiction. However, because libpng has
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been distributed and maintained world-wide, continually since 1995,
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the Copyright owner claims "common-law trademark protection" in any
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jurisdiction where common-law trademark is recognized.
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Also, the PNG logo (in PNG format, of course) is supplied in the
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files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
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OSI CERTIFICATION:
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Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
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a certification mark of the Open Source Initiative. OSI has not addressed
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the additional disclaimers inserted at version 1.0.7.
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EXPORT CONTROL:
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The Copyright owner believes that the Export Control Classification
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Number (ECCN) for libpng is EAR99, which means not subject to export
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controls or International Traffic in Arms Regulations (ITAR) because
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it is open source, publicly available software, that does not contain
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any encryption software. See the EAR, paragraphs 734.3(b)(3) and
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734.7(b).
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Glenn Randers-Pehrson
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glennrp at users.sourceforge.net
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December 3, 2015
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June 9, 2016
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@ -2,7 +2,7 @@
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/* png.c - location for general purpose libpng functions
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*
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* Last changed in libpng 1.6.19 [November 12, 2015]
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* Copyright (c) 1998-2015 Glenn Randers-Pehrson
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* Copyright (c) 1998-2002,2004,2006-2015 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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*
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@ -14,7 +14,7 @@
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#include "pngpriv.h"
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/* Generate a compiler error if there is an old png.h in the search path. */
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typedef png_libpng_version_1_6_20 Your_png_h_is_not_version_1_6_20;
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typedef png_libpng_version_1_6_23 Your_png_h_is_not_version_1_6_23;
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/* Tells libpng that we have already handled the first "num_bytes" bytes
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* of the PNG file signature. If the PNG data is embedded into another
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@ -775,14 +775,15 @@ 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 1.6.20 - December 3, 2015" PNG_STRING_NEWLINE \
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"Copyright (c) 1998-2015 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
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"libpng version 1.6.23 - June 9, 2016" PNG_STRING_NEWLINE \
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"Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson" \
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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 1.6.20 - December 3, 2015\
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Copyright (c) 1998-2015 Glenn Randers-Pehrson\
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return "libpng version 1.6.23 - June 9, 2016\
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Copyright (c) 1998-2002,2004,2006-2016 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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# endif
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@ -1,9 +1,9 @@
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/* png.h - header file for PNG reference library
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*
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* libpng version 1.6.20, December 3, 2015
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* libpng version 1.6.23, June 9, 2016
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*
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* Copyright (c) 1998-2015 Glenn Randers-Pehrson
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* Copyright (c) 1998-2002,2004,2006-2016 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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*
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@ -12,7 +12,7 @@
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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 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
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* libpng versions 0.97, January 1998, through 1.6.20, December 3, 2015:
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* libpng versions 0.97, January 1998, through 1.6.23, June 9, 2016:
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* Glenn Randers-Pehrson.
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* See also "Contributing Authors", below.
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*/
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@ -25,8 +25,12 @@
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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 1.0.7, July 1, 2000, through 1.6.20, December 3, 2015, are
|
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* Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, are
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* Some files in the "contrib" directory and some configure-generated
|
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* files that are distributed with libpng have other copyright owners and
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* are released under other open source licenses.
|
||||
*
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* libpng versions 1.0.7, July 1, 2000 through 1.6.23, June 9, 2016 are
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* Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
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* derived from libpng-1.0.6, and are distributed according to the same
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* disclaimer and license as libpng-1.0.6 with the following individuals
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* added to the list of Contributing Authors:
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@ -47,6 +51,10 @@
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* risk of satisfactory quality, performance, accuracy, and effort is with
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* the user.
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*
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* Some files in the "contrib" directory have other copyright owners and
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* are released under other open source licenses.
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*
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*
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* libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
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* Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
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* libpng-0.96, and are distributed according to the same disclaimer and
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@ -57,6 +65,9 @@
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* Glenn Randers-Pehrson
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* Willem van Schaik
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*
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* Some files in the "scripts" directory have different copyright owners
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* but are also released under this license.
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*
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* libpng versions 0.89, June 1996, through 0.96, May 1997, are
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* Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
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* and are distributed according to the same disclaimer and license as
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|
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@ -70,6 +81,9 @@
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* Greg Roelofs
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* Tom Tanner
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*
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* Some files in the "scripts" directory have other copyright owners
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||||
* but are released under this license.
|
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*
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* libpng versions 0.5, May 1995, through 0.88, January 1996, are
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* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
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*
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@ -109,6 +123,29 @@
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* appreciated.
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*
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* END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
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*
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* TRADEMARK:
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*
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* The name "libpng" has not been registered by the Copyright owner
|
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* as a trademark in any jurisdiction. However, because libpng has
|
||||
* been distributed and maintained world-wide, continually since 1995,
|
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* the Copyright owner claims "common-law trademark protection" in any
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* jurisdiction where common-law trademark is recognized.
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*
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* OSI CERTIFICATION:
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*
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* Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
|
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* a certification mark of the Open Source Initiative. OSI has not addressed
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* the additional disclaimers inserted at version 1.0.7.
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*
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* EXPORT CONTROL:
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||||
*
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||||
* The Copyright owner believes that the Export Control Classification
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||||
* Number (ECCN) for libpng is EAR99, which means not subject to export
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* controls or International Traffic in Arms Regulations (ITAR) because
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* it is open source, publicly available software, that does not contain
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* any encryption software. See the EAR, paragraphs 734.3(b)(3) and
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* 734.7(b).
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*/
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/*
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@ -121,12 +158,6 @@
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* files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
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*/
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/*
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* Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
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* a certification mark of the Open Source Initiative. OSI has not addressed
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* the additional disclaimers inserted at version 1.0.7.
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*/
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/*
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* The contributing authors would like to thank all those who helped
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* with testing, bug fixes, and patience. This wouldn't have been
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@ -182,11 +213,11 @@
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* ...
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* 1.0.19 10 10019 10.so.0.19[.0]
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* ...
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* 1.2.53 13 10253 12.so.0.53[.0]
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* 1.2.56 13 10256 12.so.0.56[.0]
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* ...
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* 1.5.23 15 10523 15.so.15.23[.0]
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* 1.5.27 15 10527 15.so.15.27[.0]
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* ...
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* 1.6.20 16 10620 16.so.16.20[.0]
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* 1.6.23 16 10623 16.so.16.23[.0]
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*
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* Henceforth the source version will match the shared-library major
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* and minor numbers; the shared-library major version number will be
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@ -214,13 +245,13 @@
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* Y2K compliance in libpng:
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* =========================
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*
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* December 3, 2015
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* June 9, 2016
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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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*
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* This is your unofficial assurance that libpng from version 0.71 and
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* upward through 1.6.20 are Y2K compliant. It is my belief that
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* upward through 1.6.23 are Y2K compliant. It is my belief that
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* earlier versions were also Y2K compliant.
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*
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* Libpng only has two year fields. One is a 2-byte unsigned integer
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@ -282,9 +313,9 @@
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*/
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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 "1.6.20"
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#define PNG_LIBPNG_VER_STRING "1.6.23"
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#define PNG_HEADER_VERSION_STRING \
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" libpng version 1.6.20 - December 3, 2015\n"
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" libpng version 1.6.23 - June 9, 2016\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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@ -292,7 +323,7 @@
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/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
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#define PNG_LIBPNG_VER_MAJOR 1
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#define PNG_LIBPNG_VER_MINOR 6
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#define PNG_LIBPNG_VER_RELEASE 20
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#define PNG_LIBPNG_VER_RELEASE 23
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/* This should match the numeric part of the final component of
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* PNG_LIBPNG_VER_STRING, omitting any leading zero:
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@ -323,7 +354,7 @@
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* version 1.0.0 was mis-numbered 100 instead of 10000). From
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* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
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*/
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#define PNG_LIBPNG_VER 10620 /* 1.6.20 */
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#define PNG_LIBPNG_VER 10623 /* 1.6.23 */
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/* Library configuration: these options cannot be changed after
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* the library has been built.
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@ -433,7 +464,7 @@ extern "C" {
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/* This triggers a compiler error in png.c, if png.c and png.h
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* do not agree upon the version number.
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*/
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typedef char* png_libpng_version_1_6_20;
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typedef char* png_libpng_version_1_6_23;
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/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info.
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*
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@ -734,24 +765,22 @@ typedef png_unknown_chunk * * png_unknown_chunkpp;
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* data in the info_struct to be written into the output file. The values
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* of the PNG_INFO_<chunk> defines should NOT be changed.
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*/
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#define PNG_INFO_gAMA 0x0001
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#define PNG_INFO_sBIT 0x0002
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#define PNG_INFO_cHRM 0x0004
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#define PNG_INFO_PLTE 0x0008
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#define PNG_INFO_tRNS 0x0010
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#define PNG_INFO_bKGD 0x0020
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#define PNG_INFO_hIST 0x0040
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#define PNG_INFO_pHYs 0x0080
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#define PNG_INFO_oFFs 0x0100
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#define PNG_INFO_tIME 0x0200
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#define PNG_INFO_pCAL 0x0400
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#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */
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#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */
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#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
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#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
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#if INT_MAX >= 0x8000 /* else this might break */
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#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */
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#endif
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#define PNG_INFO_gAMA 0x0001U
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#define PNG_INFO_sBIT 0x0002U
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#define PNG_INFO_cHRM 0x0004U
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#define PNG_INFO_PLTE 0x0008U
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#define PNG_INFO_tRNS 0x0010U
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#define PNG_INFO_bKGD 0x0020U
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#define PNG_INFO_hIST 0x0040U
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#define PNG_INFO_pHYs 0x0080U
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#define PNG_INFO_oFFs 0x0100U
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#define PNG_INFO_tIME 0x0200U
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#define PNG_INFO_pCAL 0x0400U
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#define PNG_INFO_sRGB 0x0800U /* GR-P, 0.96a */
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#define PNG_INFO_iCCP 0x1000U /* ESR, 1.0.6 */
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#define PNG_INFO_sPLT 0x2000U /* ESR, 1.0.6 */
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#define PNG_INFO_sCAL 0x4000U /* ESR, 1.0.6 */
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#define PNG_INFO_IDAT 0x8000U /* ESR, 1.0.6 */
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/* This is used for the transformation routines, as some of them
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* change these values for the row. It also should enable using
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@ -1322,7 +1351,7 @@ PNG_EXPORT(229, void, png_set_scale_16, (png_structrp png_ptr));
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#endif
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#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
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#define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */
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#define PNG_READ_16_TO_8_SUPPORTED /* Name prior to 1.5.4 */
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/* Strip the second byte of information from a 16-bit depth file. */
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PNG_EXPORT(48, void, png_set_strip_16, (png_structrp png_ptr));
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#endif
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@ -1473,8 +1502,8 @@ PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method,
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#define PNG_FILTER_UP 0x20
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#define PNG_FILTER_AVG 0x40
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#define PNG_FILTER_PAETH 0x80
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#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
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PNG_FILTER_AVG | PNG_FILTER_PAETH)
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#define PNG_FAST_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP)
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#define PNG_ALL_FILTERS (PNG_FAST_FILTERS | PNG_FILTER_AVG | PNG_FILTER_PAETH)
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/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now.
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* These defines should NOT be changed.
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@ -1751,21 +1780,21 @@ PNG_EXPORT(99, void, png_data_freer, (png_const_structrp png_ptr,
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#define PNG_SET_WILL_FREE_DATA 1
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#define PNG_USER_WILL_FREE_DATA 2
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/* Flags for png_ptr->free_me and info_ptr->free_me */
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#define PNG_FREE_HIST 0x0008
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#define PNG_FREE_ICCP 0x0010
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#define PNG_FREE_SPLT 0x0020
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#define PNG_FREE_ROWS 0x0040
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#define PNG_FREE_PCAL 0x0080
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#define PNG_FREE_SCAL 0x0100
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#define PNG_FREE_HIST 0x0008U
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#define PNG_FREE_ICCP 0x0010U
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#define PNG_FREE_SPLT 0x0020U
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#define PNG_FREE_ROWS 0x0040U
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#define PNG_FREE_PCAL 0x0080U
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#define PNG_FREE_SCAL 0x0100U
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#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
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# define PNG_FREE_UNKN 0x0200
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# define PNG_FREE_UNKN 0x0200U
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#endif
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/* PNG_FREE_LIST 0x0400 removed in 1.6.0 because it is ignored */
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#define PNG_FREE_PLTE 0x1000
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#define PNG_FREE_TRNS 0x2000
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#define PNG_FREE_TEXT 0x4000
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#define PNG_FREE_ALL 0x7fff
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||||
#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
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||||
/* PNG_FREE_LIST 0x0400U removed in 1.6.0 because it is ignored */
|
||||
#define PNG_FREE_PLTE 0x1000U
|
||||
#define PNG_FREE_TRNS 0x2000U
|
||||
#define PNG_FREE_TEXT 0x4000U
|
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#define PNG_FREE_ALL 0x7fffU
|
||||
#define PNG_FREE_MUL 0x4220U /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_const_structrp png_ptr,
|
||||
|
|
@ -2889,12 +2918,19 @@ typedef struct
|
|||
* is the minimum 'row stride', the minimum count of components between each
|
||||
* row. For a color-mapped image this is the minimum number of bytes in a
|
||||
* row.
|
||||
*
|
||||
* WARNING: this macro overflows for some images with more than one component
|
||||
* and very large image widths. libpng will refuse to process an image where
|
||||
* this macro would overflow.
|
||||
*/
|
||||
|
||||
#define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\
|
||||
(PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride))
|
||||
/* Return the size, in bytes, of an image buffer given a png_image and a row
|
||||
* stride - the number of components to leave space for in each row.
|
||||
*
|
||||
* WARNING: this macro overflows a 32-bit integer for some large PNG images,
|
||||
* libpng will refuse to process an image where such an overflow would occur.
|
||||
*/
|
||||
|
||||
#define PNG_IMAGE_SIZE(image)\
|
||||
|
|
@ -3015,7 +3051,6 @@ PNG_EXPORT(238, void, png_image_free, (png_imagep image));
|
|||
#endif /* SIMPLIFIED_READ */
|
||||
|
||||
#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
|
||||
#ifdef PNG_STDIO_SUPPORTED
|
||||
/* WRITE APIS
|
||||
* ----------
|
||||
* For write you must initialize a png_image structure to describe the image to
|
||||
|
|
@ -3032,6 +3067,7 @@ PNG_EXPORT(238, void, png_image_free, (png_imagep image));
|
|||
* values do not correspond to the colors in sRGB.
|
||||
* colormap_entries: set to the number of entries in the color-map (0 to 256)
|
||||
*/
|
||||
#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED
|
||||
PNG_EXPORT(239, int, png_image_write_to_file, (png_imagep image,
|
||||
const char *file, int convert_to_8bit, const void *buffer,
|
||||
png_int_32 row_stride, const void *colormap));
|
||||
|
|
@ -3041,8 +3077,9 @@ PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file,
|
|||
int convert_to_8_bit, const void *buffer, png_int_32 row_stride,
|
||||
const void *colormap));
|
||||
/* Write the image to the given (FILE*). */
|
||||
#endif /* SIMPLIFIED_WRITE_STDIO */
|
||||
|
||||
/* With both write APIs if image is in one of the linear formats with 16-bit
|
||||
/* With all write APIs if image is in one of the linear formats with 16-bit
|
||||
* data then setting convert_to_8_bit will cause the output to be an 8-bit PNG
|
||||
* gamma encoded according to the sRGB specification, otherwise a 16-bit linear
|
||||
* encoded PNG file is written.
|
||||
|
|
@ -3054,13 +3091,103 @@ PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file,
|
|||
*
|
||||
* With all APIs row_stride is handled as in the read APIs - it is the spacing
|
||||
* from one row to the next in component sized units (1 or 2 bytes) and if
|
||||
* negative indicates a bottom-up row layout in the buffer. If row_stride is zero,
|
||||
* libpng will calculate it for you from the image width and number of channels.
|
||||
* negative indicates a bottom-up row layout in the buffer. If row_stride is
|
||||
* zero, libpng will calculate it for you from the image width and number of
|
||||
* channels.
|
||||
*
|
||||
* Note that the write API does not support interlacing, sub-8-bit pixels, indexed
|
||||
* PNG (color_type 3) or most ancillary chunks.
|
||||
* Note that the write API does not support interlacing, sub-8-bit pixels or
|
||||
* most ancillary chunks. If you need to write text chunks (e.g. for copyright
|
||||
* notices) you need to use one of the other APIs.
|
||||
*/
|
||||
#endif /* STDIO */
|
||||
|
||||
PNG_EXPORT(245, int, png_image_write_to_memory, (png_imagep image, void *memory,
|
||||
png_alloc_size_t * PNG_RESTRICT memory_bytes, int convert_to_8_bit,
|
||||
const void *buffer, png_int_32 row_stride, const void *colormap));
|
||||
/* Write the image to the given memory buffer. The function both writes the
|
||||
* whole PNG data stream to *memory and updates *memory_bytes with the count
|
||||
* of bytes written.
|
||||
*
|
||||
* 'memory' may be NULL. In this case *memory_bytes is not read however on
|
||||
* success the number of bytes which would have been written will still be
|
||||
* stored in *memory_bytes. On failure *memory_bytes will contain 0.
|
||||
*
|
||||
* If 'memory' is not NULL it must point to memory[*memory_bytes] of
|
||||
* writeable memory.
|
||||
*
|
||||
* If the function returns success memory[*memory_bytes] (if 'memory' is not
|
||||
* NULL) contains the written PNG data. *memory_bytes will always be less
|
||||
* than or equal to the original value.
|
||||
*
|
||||
* If the function returns false and *memory_bytes was not changed an error
|
||||
* occured during write. If *memory_bytes was changed, or is not 0 if
|
||||
* 'memory' was NULL, the write would have succeeded but for the memory
|
||||
* buffer being too small. *memory_bytes contains the required number of
|
||||
* bytes and will be bigger that the original value.
|
||||
*/
|
||||
|
||||
#define png_image_write_get_memory_size(image, size, convert_to_8_bit, buffer,\
|
||||
row_stride, colormap)\
|
||||
png_image_write_to_memory(&(image), 0, &(size), convert_to_8_bit, buffer,\
|
||||
row_stride, colormap)
|
||||
/* Return the amount of memory in 'size' required to compress this image.
|
||||
* The png_image structure 'image' must be filled in as in the above
|
||||
* function and must not be changed before the actual write call, the buffer
|
||||
* and all other parameters must also be identical to that in the final
|
||||
* write call. The 'size' variable need not be initialized.
|
||||
*
|
||||
* NOTE: the macro returns true/false, if false is returned 'size' will be
|
||||
* set to zero and the write failed and probably will fail if tried again.
|
||||
*/
|
||||
|
||||
/* You can pre-allocate the buffer by making sure it is of sufficient size
|
||||
* regardless of the amount of compression achieved. The buffer size will
|
||||
* always be bigger than the original image and it will never be filled. The
|
||||
* following macros are provided to assist in allocating the buffer.
|
||||
*/
|
||||
#define PNG_IMAGE_DATA_SIZE(image) (PNG_IMAGE_SIZE(image)+(image).height)
|
||||
/* The number of uncompressed bytes in the PNG byte encoding of the image;
|
||||
* uncompressing the PNG IDAT data will give this number of bytes.
|
||||
*
|
||||
* NOTE: while PNG_IMAGE_SIZE cannot overflow for an image in memory this
|
||||
* macro can because of the extra bytes used in the PNG byte encoding. You
|
||||
* need to avoid this macro if your image size approaches 2^30 in width or
|
||||
* height. The same goes for the remainder of these macros; they all produce
|
||||
* bigger numbers than the actual in-memory image size.
|
||||
*/
|
||||
#ifndef PNG_ZLIB_MAX_SIZE
|
||||
# define PNG_ZLIB_MAX_SIZE(b) ((b)+(((b)+7U)>>3)+(((b)+63U)>>6)+11U)
|
||||
/* An upper bound on the number of compressed bytes given 'b' uncompressed
|
||||
* bytes. This is based on deflateBounds() in zlib; different
|
||||
* implementations of zlib compression may conceivably produce more data so
|
||||
* if your zlib implementation is not zlib itself redefine this macro
|
||||
* appropriately.
|
||||
*/
|
||||
#endif
|
||||
|
||||
#define PNG_IMAGE_COMPRESSED_SIZE_MAX(image)\
|
||||
PNG_ZLIB_MAX_SIZE((png_alloc_size_t)PNG_IMAGE_DATA_SIZE(image))
|
||||
/* An upper bound on the size of the data in the PNG IDAT chunks. */
|
||||
|
||||
#define PNG_IMAGE_PNG_SIZE_MAX_(image, image_size)\
|
||||
((8U/*sig*/+25U/*IHDR*/+16U/*gAMA*/+44U/*cHRM*/+12U/*IEND*/+\
|
||||
(((image).format&PNG_FORMAT_FLAG_COLORMAP)?/*colormap: PLTE, tRNS*/\
|
||||
12U+3U*(image).colormap_entries/*PLTE data*/+\
|
||||
(((image).format&PNG_FORMAT_FLAG_ALPHA)?\
|
||||
12U/*tRNS*/+(image).colormap_entries:0U):0U)+\
|
||||
12U)+(12U*((image_size)/PNG_ZBUF_SIZE))/*IDAT*/+(image_size))
|
||||
/* A helper for the following macro; if your compiler cannot handle the
|
||||
* following macro use this one with the result of
|
||||
* PNG_IMAGE_COMPRESSED_SIZE_MAX(image) as the second argument (most
|
||||
* compilers should handle this just fine.)
|
||||
*/
|
||||
|
||||
#define PNG_IMAGE_PNG_SIZE_MAX(image)\
|
||||
PNG_IMAGE_PNG_SIZE_MAX_(image, PNG_IMAGE_COMPRESSED_SIZE_MAX(image))
|
||||
/* An upper bound on the total length of the PNG data stream for 'image'.
|
||||
* The result is of type png_alloc_size_t, on 32-bit systems this may
|
||||
* overflow even though PNG_IMAGE_DATA_SIZE does not overflow; the write will
|
||||
* run out of buffer space but return a corrected size which should work.
|
||||
*/
|
||||
#endif /* SIMPLIFIED_WRITE */
|
||||
/*******************************************************************************
|
||||
* END OF SIMPLIFIED API
|
||||
|
|
@ -3118,7 +3245,7 @@ PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
|
|||
* one to use is one more than this.)
|
||||
*/
|
||||
#ifdef PNG_EXPORT_LAST_ORDINAL
|
||||
PNG_EXPORT_LAST_ORDINAL(244);
|
||||
PNG_EXPORT_LAST_ORDINAL(245);
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
|
|
|
|||
|
|
@ -1,9 +1,9 @@
|
|||
|
||||
/* pngconf.h - machine configurable file for libpng
|
||||
*
|
||||
* libpng version 1.6.20, December 3, 2015
|
||||
* libpng version 1.6.23, June 9, 2016
|
||||
*
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
|
||||
*
|
||||
* Last changed in libpng 1.6.8 [December 19, 2013]
|
||||
* Copyright (c) 1998-2013 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2013 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngerror.c - stub functions for i/o and memory allocation
|
||||
*
|
||||
* Last changed in libpng 1.6.15 [November 20, 2014]
|
||||
* Copyright (c) 1998-2014 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2014 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.)
|
||||
*
|
||||
|
|
@ -44,7 +44,7 @@ png_error,(png_const_structrp png_ptr, png_const_charp error_message),
|
|||
if (png_ptr != NULL)
|
||||
{
|
||||
if ((png_ptr->flags &
|
||||
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) != 0
|
||||
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) != 0)
|
||||
{
|
||||
if (*error_message == PNG_LITERAL_SHARP)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngget.c - retrieval of values from info struct
|
||||
*
|
||||
* Last changed in libpng 1.6.17 [March 26, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
@ -456,11 +456,11 @@ png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr,
|
|||
return (retval);
|
||||
}
|
||||
#endif /* pHYs */
|
||||
#endif /* INCH_CONVERSIONS */
|
||||
#endif /* INCH_CONVERSIONS */
|
||||
|
||||
/* png_get_channels really belongs in here, too, but it's been around longer */
|
||||
|
||||
#endif /* EASY_ACCESS */
|
||||
#endif /* EASY_ACCESS */
|
||||
|
||||
|
||||
png_byte PNGAPI
|
||||
|
|
@ -1142,19 +1142,19 @@ png_get_compression_buffer_size(png_const_structrp png_ptr)
|
|||
return 0;
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0)
|
||||
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0)
|
||||
#endif
|
||||
{
|
||||
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
|
||||
return png_ptr->IDAT_read_size;
|
||||
return png_ptr->IDAT_read_size;
|
||||
#else
|
||||
return PNG_IDAT_READ_SIZE;
|
||||
return PNG_IDAT_READ_SIZE;
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
else
|
||||
return png_ptr->zbuffer_size;
|
||||
else
|
||||
return png_ptr->zbuffer_size;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pnginfo.h - header file for PNG reference library
|
||||
*
|
||||
* Last changed in libpng 1.6.1 [March 28, 2013]
|
||||
* Copyright (c) 1998-2013 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2013 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngmem.c - stub functions for memory allocation
|
||||
*
|
||||
* Last changed in libpng 1.6.15 [November 20, 2014]
|
||||
* Copyright (c) 1998-2014 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2014 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
/* pngpread.c - read a png file in push mode
|
||||
*
|
||||
* Last changed in libpng 1.6.18 [July 23, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Last changed in libpng 1.6.23 [June 9, 2016]
|
||||
* Copyright (c) 1998-2002,2004,2006-2016 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.)
|
||||
*
|
||||
|
|
@ -210,12 +210,14 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
|
|||
(png_ptr->mode & PNG_HAVE_PLTE) == 0)
|
||||
png_error(png_ptr, "Missing PLTE before IDAT");
|
||||
|
||||
png_ptr->mode |= PNG_HAVE_IDAT;
|
||||
png_ptr->process_mode = PNG_READ_IDAT_MODE;
|
||||
|
||||
if ((png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) == 0)
|
||||
if (png_ptr->push_length == 0)
|
||||
return;
|
||||
if ((png_ptr->mode & PNG_HAVE_IDAT) != 0)
|
||||
if ((png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) == 0)
|
||||
if (png_ptr->push_length == 0)
|
||||
return;
|
||||
|
||||
png_ptr->mode |= PNG_HAVE_IDAT;
|
||||
|
||||
if ((png_ptr->mode & PNG_AFTER_IDAT) != 0)
|
||||
png_benign_error(png_ptr, "Too many IDATs found");
|
||||
|
|
@ -499,7 +501,10 @@ png_push_save_buffer(png_structrp png_ptr)
|
|||
png_error(png_ptr, "Insufficient memory for save_buffer");
|
||||
}
|
||||
|
||||
memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
|
||||
if (old_buffer)
|
||||
memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
|
||||
else if (png_ptr->save_buffer_size)
|
||||
png_error(png_ptr, "save_buffer error");
|
||||
png_free(png_ptr, old_buffer);
|
||||
png_ptr->save_buffer_max = new_max;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
/* pngpriv.h - private declarations for use inside libpng
|
||||
*
|
||||
* Last changed in libpng 1.6.18 [July 23, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Last changed in libpng 1.6.22 [May 26, 2016]
|
||||
* Copyright (c) 1998-2002,2004,2006-2016 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.)
|
||||
*
|
||||
|
|
@ -1917,6 +1917,9 @@ PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_neon,
|
|||
(png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
|
||||
#endif
|
||||
|
||||
PNG_INTERNAL_FUNCTION(png_uint_32, png_check_keyword, (png_structrp png_ptr,
|
||||
png_const_charp key, png_bytep new_key), PNG_EMPTY);
|
||||
|
||||
/* Maintainer: Put new private prototypes here ^ */
|
||||
|
||||
#include "pngdebug.h"
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
/* pngread.c - read a PNG file
|
||||
*
|
||||
* Last changed in libpng 1.6.17 [March 26, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Last changed in libpng 1.6.23 [June 9, 2016]
|
||||
* Copyright (c) 1998-2002,2004,2006-2016 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.)
|
||||
*
|
||||
|
|
@ -127,7 +127,10 @@ png_read_info(png_structrp png_ptr, png_inforp info_ptr)
|
|||
}
|
||||
|
||||
else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0)
|
||||
{
|
||||
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
|
||||
png_ptr->mode |= PNG_AFTER_IDAT;
|
||||
}
|
||||
|
||||
/* This should be a binary subdivision search or a hash for
|
||||
* matching the chunk name rather than a linear search.
|
||||
|
|
@ -785,6 +788,9 @@ png_read_end(png_structrp png_ptr, png_inforp info_ptr)
|
|||
png_uint_32 length = png_read_chunk_header(png_ptr);
|
||||
png_uint_32 chunk_name = png_ptr->chunk_name;
|
||||
|
||||
if (chunk_name != png_IDAT)
|
||||
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
|
||||
|
||||
if (chunk_name == png_IEND)
|
||||
png_handle_IEND(png_ptr, info_ptr, length);
|
||||
|
||||
|
|
@ -799,9 +805,9 @@ png_read_end(png_structrp png_ptr, png_inforp info_ptr)
|
|||
{
|
||||
if (chunk_name == png_IDAT)
|
||||
{
|
||||
if ((length > 0) ||
|
||||
(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0)
|
||||
png_benign_error(png_ptr, "Too many IDATs found");
|
||||
if ((length > 0 && !(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED))
|
||||
|| (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0)
|
||||
png_benign_error(png_ptr, ".Too many IDATs found");
|
||||
}
|
||||
png_handle_unknown(png_ptr, info_ptr, length, keep);
|
||||
if (chunk_name == png_PLTE)
|
||||
|
|
@ -812,10 +818,14 @@ png_read_end(png_structrp png_ptr, png_inforp info_ptr)
|
|||
else if (chunk_name == png_IDAT)
|
||||
{
|
||||
/* Zero length IDATs are legal after the last IDAT has been
|
||||
* read, but not after other chunks have been read.
|
||||
* read, but not after other chunks have been read. 1.6 does not
|
||||
* always read all the deflate data; specifically it cannot be relied
|
||||
* upon to read the Adler32 at the end. If it doesn't ignore IDAT
|
||||
* chunks which are longer than zero as well:
|
||||
*/
|
||||
if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0)
|
||||
png_benign_error(png_ptr, "Too many IDATs found");
|
||||
if ((length > 0 && !(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED))
|
||||
|| (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0)
|
||||
png_benign_error(png_ptr, "..Too many IDATs found");
|
||||
|
||||
png_crc_finish(png_ptr, length);
|
||||
}
|
||||
|
|
@ -3848,16 +3858,16 @@ png_image_read_direct(png_voidp argument)
|
|||
else
|
||||
filler = 255;
|
||||
|
||||
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
|
||||
if ((format & PNG_FORMAT_FLAG_AFIRST) != 0)
|
||||
{
|
||||
where = PNG_FILLER_BEFORE;
|
||||
change &= ~PNG_FORMAT_FLAG_AFIRST;
|
||||
}
|
||||
#ifdef PNG_FORMAT_AFIRST_SUPPORTED
|
||||
if ((format & PNG_FORMAT_FLAG_AFIRST) != 0)
|
||||
{
|
||||
where = PNG_FILLER_BEFORE;
|
||||
change &= ~PNG_FORMAT_FLAG_AFIRST;
|
||||
}
|
||||
|
||||
else
|
||||
# endif
|
||||
where = PNG_FILLER_AFTER;
|
||||
else
|
||||
#endif
|
||||
where = PNG_FILLER_AFTER;
|
||||
|
||||
png_set_add_alpha(png_ptr, filler, where);
|
||||
}
|
||||
|
|
@ -3965,12 +3975,12 @@ png_image_read_direct(png_voidp argument)
|
|||
if (info_ptr->bit_depth == 16)
|
||||
info_format |= PNG_FORMAT_FLAG_LINEAR;
|
||||
|
||||
# ifdef PNG_FORMAT_BGR_SUPPORTED
|
||||
if ((png_ptr->transformations & PNG_BGR) != 0)
|
||||
info_format |= PNG_FORMAT_FLAG_BGR;
|
||||
# endif
|
||||
#ifdef PNG_FORMAT_BGR_SUPPORTED
|
||||
if ((png_ptr->transformations & PNG_BGR) != 0)
|
||||
info_format |= PNG_FORMAT_FLAG_BGR;
|
||||
#endif
|
||||
|
||||
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
|
||||
#ifdef PNG_FORMAT_AFIRST_SUPPORTED
|
||||
if (do_local_background == 2)
|
||||
{
|
||||
if ((format & PNG_FORMAT_FLAG_AFIRST) != 0)
|
||||
|
|
@ -4071,58 +4081,84 @@ png_image_finish_read(png_imagep image, png_const_colorp background,
|
|||
{
|
||||
if (image != NULL && image->version == PNG_IMAGE_VERSION)
|
||||
{
|
||||
png_uint_32 check;
|
||||
/* Check for row_stride overflow. This check is not performed on the
|
||||
* original PNG format because it may not occur in the output PNG format
|
||||
* and libpng deals with the issues of reading the original.
|
||||
*/
|
||||
const unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format);
|
||||
|
||||
if (row_stride == 0)
|
||||
row_stride = PNG_IMAGE_ROW_STRIDE(*image);
|
||||
|
||||
if (row_stride < 0)
|
||||
check = -row_stride;
|
||||
|
||||
else
|
||||
check = row_stride;
|
||||
|
||||
if (image->opaque != NULL && buffer != NULL &&
|
||||
check >= PNG_IMAGE_ROW_STRIDE(*image))
|
||||
if (image->width <= 0x7FFFFFFFU/channels) /* no overflow */
|
||||
{
|
||||
if ((image->format & PNG_FORMAT_FLAG_COLORMAP) == 0 ||
|
||||
(image->colormap_entries > 0 && colormap != NULL))
|
||||
png_uint_32 check;
|
||||
const png_uint_32 png_row_stride = image->width * channels;
|
||||
|
||||
if (row_stride == 0)
|
||||
row_stride = (png_int_32)/*SAFE*/png_row_stride;
|
||||
|
||||
if (row_stride < 0)
|
||||
check = -row_stride;
|
||||
|
||||
else
|
||||
check = row_stride;
|
||||
|
||||
if (image->opaque != NULL && buffer != NULL && check >= png_row_stride)
|
||||
{
|
||||
int result;
|
||||
png_image_read_control display;
|
||||
|
||||
memset(&display, 0, (sizeof display));
|
||||
display.image = image;
|
||||
display.buffer = buffer;
|
||||
display.row_stride = row_stride;
|
||||
display.colormap = colormap;
|
||||
display.background = background;
|
||||
display.local_row = NULL;
|
||||
|
||||
/* Choose the correct 'end' routine; for the color-map case all the
|
||||
* setup has already been done.
|
||||
/* Now check for overflow of the image buffer calculation; this
|
||||
* limits the whole image size to 32 bits for API compatibility with
|
||||
* the current, 32-bit, PNG_IMAGE_BUFFER_SIZE macro.
|
||||
*/
|
||||
if ((image->format & PNG_FORMAT_FLAG_COLORMAP) != 0)
|
||||
result =
|
||||
png_safe_execute(image, png_image_read_colormap, &display) &&
|
||||
png_safe_execute(image, png_image_read_colormapped, &display);
|
||||
if (image->height <= 0xFFFFFFFF/png_row_stride)
|
||||
{
|
||||
if ((image->format & PNG_FORMAT_FLAG_COLORMAP) == 0 ||
|
||||
(image->colormap_entries > 0 && colormap != NULL))
|
||||
{
|
||||
int result;
|
||||
png_image_read_control display;
|
||||
|
||||
memset(&display, 0, (sizeof display));
|
||||
display.image = image;
|
||||
display.buffer = buffer;
|
||||
display.row_stride = row_stride;
|
||||
display.colormap = colormap;
|
||||
display.background = background;
|
||||
display.local_row = NULL;
|
||||
|
||||
/* Choose the correct 'end' routine; for the color-map case
|
||||
* all the setup has already been done.
|
||||
*/
|
||||
if ((image->format & PNG_FORMAT_FLAG_COLORMAP) != 0)
|
||||
result = png_safe_execute(image,
|
||||
png_image_read_colormap, &display) &&
|
||||
png_safe_execute(image,
|
||||
png_image_read_colormapped, &display);
|
||||
|
||||
else
|
||||
result =
|
||||
png_safe_execute(image,
|
||||
png_image_read_direct, &display);
|
||||
|
||||
png_image_free(image);
|
||||
return result;
|
||||
}
|
||||
|
||||
else
|
||||
return png_image_error(image,
|
||||
"png_image_finish_read[color-map]: no color-map");
|
||||
}
|
||||
|
||||
else
|
||||
result =
|
||||
png_safe_execute(image, png_image_read_direct, &display);
|
||||
|
||||
png_image_free(image);
|
||||
return result;
|
||||
return png_image_error(image,
|
||||
"png_image_finish_read: image too large");
|
||||
}
|
||||
|
||||
else
|
||||
return png_image_error(image,
|
||||
"png_image_finish_read[color-map]: no color-map");
|
||||
"png_image_finish_read: invalid argument");
|
||||
}
|
||||
|
||||
else
|
||||
return png_image_error(image,
|
||||
"png_image_finish_read: invalid argument");
|
||||
"png_image_finish_read: row_stride too large");
|
||||
}
|
||||
|
||||
else if (image != NULL)
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngrio.c - functions for data input
|
||||
*
|
||||
* Last changed in libpng 1.6.17 [March 26, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
/* pngrtran.c - transforms the data in a row for PNG readers
|
||||
*
|
||||
* Last changed in libpng 1.6.19 [November 12, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Last changed in libpng 1.6.22 [May 26, 2016]
|
||||
* Copyright (c) 1998-2002,2004,2006-2016 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.)
|
||||
*
|
||||
|
|
@ -159,7 +159,7 @@ png_set_background(png_structrp png_ptr,
|
|||
png_set_background_fixed(png_ptr, background_color, background_gamma_code,
|
||||
need_expand, png_fixed(png_ptr, background_gamma, "png_set_background"));
|
||||
}
|
||||
# endif /* FLOATING_POINT */
|
||||
# endif /* FLOATING_POINT */
|
||||
#endif /* READ_BACKGROUND */
|
||||
|
||||
/* Scale 16-bit depth files to 8-bit depth. If both of these are set then the
|
||||
|
|
@ -289,9 +289,12 @@ png_set_alpha_mode_fixed(png_structrp png_ptr, int mode,
|
|||
* is expected to be 1 or greater, but this range test allows for some
|
||||
* viewing correction values. The intent is to weed out users of this API
|
||||
* who use the inverse of the gamma value accidentally! Since some of these
|
||||
* values are reasonable this may have to be changed.
|
||||
* values are reasonable this may have to be changed:
|
||||
*
|
||||
* 1.6.x: changed from 0.07..3 to 0.01..100 (to accomodate the optimal 16-bit
|
||||
* gamma of 36, and its reciprocal.)
|
||||
*/
|
||||
if (output_gamma < 70000 || output_gamma > 300000)
|
||||
if (output_gamma < 1000 || output_gamma > 10000000)
|
||||
png_error(png_ptr, "output gamma out of expected range");
|
||||
|
||||
/* The default file gamma is the inverse of the output gamma; the output
|
||||
|
|
@ -1912,7 +1915,7 @@ png_init_read_transformations(png_structrp png_ptr)
|
|||
png_ptr->palette[i].blue = (png_byte)component;
|
||||
}
|
||||
}
|
||||
#endif /* READ_SHIFT */
|
||||
#endif /* READ_SHIFT */
|
||||
}
|
||||
|
||||
/* Modify the info structure to reflect the transformations. The
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
/* pngrutil.c - utilities to read a PNG file
|
||||
*
|
||||
* Last changed in libpng 1.6.20 [December 3, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Last changed in libpng 1.6.20 [December 3, 2014]
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
/* pngset.c - storage of image information into info struct
|
||||
*
|
||||
* Last changed in libpng 1.6.19 [November 12, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Last changed in libpng 1.6.23 [June 9, 2016]
|
||||
* Copyright (c) 1998-2016 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.)
|
||||
*
|
||||
|
|
@ -952,12 +952,14 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
|
|||
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
|
||||
|
||||
/* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
|
||||
png_ptr->trans_alpha = info_ptr->trans_alpha = png_voidcast(png_bytep,
|
||||
png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH));
|
||||
|
||||
if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
|
||||
{
|
||||
/* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
|
||||
info_ptr->trans_alpha = png_voidcast(png_bytep,
|
||||
png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH));
|
||||
memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
|
||||
}
|
||||
png_ptr->trans_alpha = info_ptr->trans_alpha;
|
||||
}
|
||||
|
||||
if (trans_color != NULL)
|
||||
|
|
@ -1644,4 +1646,88 @@ png_set_check_for_invalid_index(png_structrp png_ptr, int allowed)
|
|||
png_ptr->num_palette_max = -1;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) || \
|
||||
defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
|
||||
/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
|
||||
* and if invalid, correct the keyword rather than discarding the entire
|
||||
* chunk. The PNG 1.0 specification requires keywords 1-79 characters in
|
||||
* length, forbids leading or trailing whitespace, multiple internal spaces,
|
||||
* and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
|
||||
*
|
||||
* The 'new_key' buffer must be 80 characters in size (for the keyword plus a
|
||||
* trailing '\0'). If this routine returns 0 then there was no keyword, or a
|
||||
* valid one could not be generated, and the caller must png_error.
|
||||
*/
|
||||
png_uint_32 /* PRIVATE */
|
||||
png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
|
||||
{
|
||||
png_const_charp orig_key = key;
|
||||
png_uint_32 key_len = 0;
|
||||
int bad_character = 0;
|
||||
int space = 1;
|
||||
|
||||
png_debug(1, "in png_check_keyword");
|
||||
|
||||
if (key == NULL)
|
||||
{
|
||||
*new_key = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
while (*key && key_len < 79)
|
||||
{
|
||||
png_byte ch = (png_byte)*key++;
|
||||
|
||||
if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/))
|
||||
*new_key++ = ch, ++key_len, space = 0;
|
||||
|
||||
else if (space == 0)
|
||||
{
|
||||
/* A space or an invalid character when one wasn't seen immediately
|
||||
* before; output just a space.
|
||||
*/
|
||||
*new_key++ = 32, ++key_len, space = 1;
|
||||
|
||||
/* If the character was not a space then it is invalid. */
|
||||
if (ch != 32)
|
||||
bad_character = ch;
|
||||
}
|
||||
|
||||
else if (bad_character == 0)
|
||||
bad_character = ch; /* just skip it, record the first error */
|
||||
}
|
||||
|
||||
if (key_len > 0 && space != 0) /* trailing space */
|
||||
{
|
||||
--key_len, --new_key;
|
||||
if (bad_character == 0)
|
||||
bad_character = 32;
|
||||
}
|
||||
|
||||
/* Terminate the keyword */
|
||||
*new_key = 0;
|
||||
|
||||
if (key_len == 0)
|
||||
return 0;
|
||||
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
/* Try to only output one warning per keyword: */
|
||||
if (*key != 0) /* keyword too long */
|
||||
png_warning(png_ptr, "keyword truncated");
|
||||
|
||||
else if (bad_character != 0)
|
||||
{
|
||||
PNG_WARNING_PARAMETERS(p)
|
||||
|
||||
png_warning_parameter(p, 1, orig_key);
|
||||
png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_02x, bad_character);
|
||||
|
||||
png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'");
|
||||
}
|
||||
#endif /* WARNINGS */
|
||||
|
||||
return key_len;
|
||||
}
|
||||
#endif /* TEXT || pCAL || iCCP || sPLT */
|
||||
#endif /* READ || WRITE */
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngstruct.h - header file for PNG reference library
|
||||
*
|
||||
* Last changed in libpng 1.6.18 [July 23, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
|
||||
*
|
||||
* Last changed in libpng 1.6.18 [July 23, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngwio.c - functions for data output
|
||||
*
|
||||
* Last changed in libpng 1.6.15 [November 20, 2014]
|
||||
* Copyright (c) 1998-2014 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2014 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngwrite.c - general routines to write a PNG file
|
||||
*
|
||||
* Last changed in libpng 1.6.19 [November 12, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
@ -12,9 +12,9 @@
|
|||
*/
|
||||
|
||||
#include "pngpriv.h"
|
||||
#if defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) && defined(PNG_STDIO_SUPPORTED)
|
||||
#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED
|
||||
# include <errno.h>
|
||||
#endif
|
||||
#endif /* SIMPLIFIED_WRITE_STDIO */
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
|
||||
|
|
@ -1452,7 +1452,6 @@ png_write_png(png_structrp png_ptr, png_inforp info_ptr,
|
|||
|
||||
|
||||
#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
|
||||
# ifdef PNG_STDIO_SUPPORTED /* currently required for png_image_write_* */
|
||||
/* Initialize the write structure - general purpose utility. */
|
||||
static int
|
||||
png_image_write_init(png_imagep image)
|
||||
|
|
@ -1504,6 +1503,10 @@ typedef struct
|
|||
png_const_voidp first_row;
|
||||
ptrdiff_t row_bytes;
|
||||
png_voidp local_row;
|
||||
/* Byte count for memory writing */
|
||||
png_bytep memory;
|
||||
png_alloc_size_t memory_bytes; /* not used for STDIO */
|
||||
png_alloc_size_t output_bytes; /* running total */
|
||||
} png_image_write_control;
|
||||
|
||||
/* Write png_uint_16 input to a 16-bit PNG; the png_ptr has already been set to
|
||||
|
|
@ -1931,9 +1934,43 @@ png_image_write_main(png_voidp argument)
|
|||
png_set_benign_errors(png_ptr, 0/*error*/);
|
||||
# endif
|
||||
|
||||
/* Default the 'row_stride' parameter if required. */
|
||||
if (display->row_stride == 0)
|
||||
display->row_stride = PNG_IMAGE_ROW_STRIDE(*image);
|
||||
/* Default the 'row_stride' parameter if required, also check the row stride
|
||||
* and total image size to ensure that they are within the system limits.
|
||||
*/
|
||||
{
|
||||
const unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format);
|
||||
|
||||
if (image->width <= 0x7FFFFFFFU/channels) /* no overflow */
|
||||
{
|
||||
png_uint_32 check;
|
||||
const png_uint_32 png_row_stride = image->width * channels;
|
||||
|
||||
if (display->row_stride == 0)
|
||||
display->row_stride = (png_int_32)/*SAFE*/png_row_stride;
|
||||
|
||||
if (display->row_stride < 0)
|
||||
check = -display->row_stride;
|
||||
|
||||
else
|
||||
check = display->row_stride;
|
||||
|
||||
if (check >= png_row_stride)
|
||||
{
|
||||
/* Now check for overflow of the image buffer calculation; this
|
||||
* limits the whole image size to 32 bits for API compatibility with
|
||||
* the current, 32-bit, PNG_IMAGE_BUFFER_SIZE macro.
|
||||
*/
|
||||
if (image->height > 0xFFFFFFFF/png_row_stride)
|
||||
png_error(image->opaque->png_ptr, "memory image too large");
|
||||
}
|
||||
|
||||
else
|
||||
png_error(image->opaque->png_ptr, "supplied row stride too small");
|
||||
}
|
||||
|
||||
else
|
||||
png_error(image->opaque->png_ptr, "image row stride too large");
|
||||
}
|
||||
|
||||
/* Set the required transforms then write the rows in the correct order. */
|
||||
if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0)
|
||||
|
|
@ -2110,6 +2147,122 @@ png_image_write_main(png_voidp argument)
|
|||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void (PNGCBAPI
|
||||
image_memory_write)(png_structp png_ptr, png_bytep/*const*/ data,
|
||||
png_size_t size)
|
||||
{
|
||||
png_image_write_control *display = png_voidcast(png_image_write_control*,
|
||||
png_ptr->io_ptr/*backdoor: png_get_io_ptr(png_ptr)*/);
|
||||
const png_alloc_size_t ob = display->output_bytes;
|
||||
|
||||
/* Check for overflow; this should never happen: */
|
||||
if (size <= ((png_alloc_size_t)-1) - ob)
|
||||
{
|
||||
/* I don't think libpng ever does this, but just in case: */
|
||||
if (size > 0)
|
||||
{
|
||||
if (display->memory_bytes >= ob+size) /* writing */
|
||||
memcpy(display->memory+ob, data, size);
|
||||
|
||||
/* Always update the size: */
|
||||
display->output_bytes = ob+size;
|
||||
}
|
||||
}
|
||||
|
||||
else
|
||||
png_error(png_ptr, "png_image_write_to_memory: PNG too big");
|
||||
}
|
||||
|
||||
static void (PNGCBAPI
|
||||
image_memory_flush)(png_structp png_ptr)
|
||||
{
|
||||
PNG_UNUSED(png_ptr)
|
||||
}
|
||||
|
||||
static int
|
||||
png_image_write_memory(png_voidp argument)
|
||||
{
|
||||
png_image_write_control *display = png_voidcast(png_image_write_control*,
|
||||
argument);
|
||||
|
||||
/* The rest of the memory-specific init and write_main in an error protected
|
||||
* environment. This case needs to use callbacks for the write operations
|
||||
* since libpng has no built in support for writing to memory.
|
||||
*/
|
||||
png_set_write_fn(display->image->opaque->png_ptr, display/*io_ptr*/,
|
||||
image_memory_write, image_memory_flush);
|
||||
|
||||
return png_image_write_main(display);
|
||||
}
|
||||
|
||||
int PNGAPI
|
||||
png_image_write_to_memory(png_imagep image, void *memory,
|
||||
png_alloc_size_t * PNG_RESTRICT memory_bytes, int convert_to_8bit,
|
||||
const void *buffer, png_int_32 row_stride, const void *colormap)
|
||||
{
|
||||
/* Write the image to the given buffer, or count the bytes if it is NULL */
|
||||
if (image != NULL && image->version == PNG_IMAGE_VERSION)
|
||||
{
|
||||
if (memory_bytes != NULL && buffer != NULL)
|
||||
{
|
||||
/* This is to give the caller an easier error detection in the NULL
|
||||
* case and guard against uninitialized variable problems:
|
||||
*/
|
||||
if (memory == NULL)
|
||||
*memory_bytes = 0;
|
||||
|
||||
if (png_image_write_init(image) != 0)
|
||||
{
|
||||
png_image_write_control display;
|
||||
int result;
|
||||
|
||||
memset(&display, 0, (sizeof display));
|
||||
display.image = image;
|
||||
display.buffer = buffer;
|
||||
display.row_stride = row_stride;
|
||||
display.colormap = colormap;
|
||||
display.convert_to_8bit = convert_to_8bit;
|
||||
display.memory = png_voidcast(png_bytep, memory);
|
||||
display.memory_bytes = *memory_bytes;
|
||||
display.output_bytes = 0;
|
||||
|
||||
result = png_safe_execute(image, png_image_write_memory, &display);
|
||||
png_image_free(image);
|
||||
|
||||
/* write_memory returns true even if we ran out of buffer. */
|
||||
if (result)
|
||||
{
|
||||
/* On out-of-buffer this function returns '0' but still updates
|
||||
* memory_bytes:
|
||||
*/
|
||||
if (memory != NULL && display.output_bytes > *memory_bytes)
|
||||
result = 0;
|
||||
|
||||
*memory_bytes = display.output_bytes;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
else
|
||||
return png_image_error(image,
|
||||
"png_image_write_to_memory: invalid argument");
|
||||
}
|
||||
|
||||
else if (image != NULL)
|
||||
return png_image_error(image,
|
||||
"png_image_write_to_memory: incorrect PNG_IMAGE_VERSION");
|
||||
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED
|
||||
int PNGAPI
|
||||
png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit,
|
||||
const void *buffer, png_int_32 row_stride, const void *colormap)
|
||||
|
|
@ -2117,7 +2270,7 @@ png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit,
|
|||
/* Write the image to the given (FILE*). */
|
||||
if (image != NULL && image->version == PNG_IMAGE_VERSION)
|
||||
{
|
||||
if (file != NULL)
|
||||
if (file != NULL && buffer != NULL)
|
||||
{
|
||||
if (png_image_write_init(image) != 0)
|
||||
{
|
||||
|
|
@ -2167,7 +2320,7 @@ png_image_write_to_file(png_imagep image, const char *file_name,
|
|||
/* Write the image to the named file. */
|
||||
if (image != NULL && image->version == PNG_IMAGE_VERSION)
|
||||
{
|
||||
if (file_name != NULL)
|
||||
if (file_name != NULL && buffer != NULL)
|
||||
{
|
||||
FILE *fp = fopen(file_name, "wb");
|
||||
|
||||
|
|
@ -2225,6 +2378,6 @@ png_image_write_to_file(png_imagep image, const char *file_name,
|
|||
else
|
||||
return 0;
|
||||
}
|
||||
# endif /* STDIO */
|
||||
#endif /* SIMPLIFIED_WRITE_STDIO */
|
||||
#endif /* SIMPLIFIED_WRITE */
|
||||
#endif /* WRITE */
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* pngwtran.c - transforms the data in a row for PNG writers
|
||||
*
|
||||
* Last changed in libpng 1.6.18 [July 23, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1998-2002,2004,2006-2015 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.)
|
||||
*
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
/* pngwutil.c - utilities to write a PNG file
|
||||
*
|
||||
* Last changed in libpng 1.6.19 [November 12, 2015]
|
||||
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
|
||||
* Last changed in libpng 1.6.22 [May 26, 2016]
|
||||
* Copyright (c) 1998-2002,2004,2006-2016 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.)
|
||||
*
|
||||
|
|
@ -23,10 +23,10 @@
|
|||
void PNGAPI
|
||||
png_save_uint_32(png_bytep buf, png_uint_32 i)
|
||||
{
|
||||
buf[0] = (png_byte)(i >> 24);
|
||||
buf[1] = (png_byte)(i >> 16);
|
||||
buf[2] = (png_byte)(i >> 8);
|
||||
buf[3] = (png_byte)(i );
|
||||
buf[0] = (png_byte)((i >> 24) & 0xffU);
|
||||
buf[1] = (png_byte)((i >> 16) & 0xffU);
|
||||
buf[2] = (png_byte)((i >> 8) & 0xffU);
|
||||
buf[3] = (png_byte)( i & 0xffU);
|
||||
}
|
||||
|
||||
/* Place a 16-bit number into a buffer in PNG byte order.
|
||||
|
|
@ -36,8 +36,8 @@ png_save_uint_32(png_bytep buf, png_uint_32 i)
|
|||
void PNGAPI
|
||||
png_save_uint_16(png_bytep buf, unsigned int i)
|
||||
{
|
||||
buf[0] = (png_byte)(i >> 8);
|
||||
buf[1] = (png_byte)(i );
|
||||
buf[0] = (png_byte)((i >> 8) & 0xffU);
|
||||
buf[1] = (png_byte)( i & 0xffU);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -665,90 +665,6 @@ png_write_compressed_data_out(png_structrp png_ptr, compression_state *comp)
|
|||
}
|
||||
#endif /* WRITE_COMPRESSED_TEXT */
|
||||
|
||||
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
|
||||
defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
|
||||
/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
|
||||
* and if invalid, correct the keyword rather than discarding the entire
|
||||
* chunk. The PNG 1.0 specification requires keywords 1-79 characters in
|
||||
* length, forbids leading or trailing whitespace, multiple internal spaces,
|
||||
* and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
|
||||
*
|
||||
* The 'new_key' buffer must be 80 characters in size (for the keyword plus a
|
||||
* trailing '\0'). If this routine returns 0 then there was no keyword, or a
|
||||
* valid one could not be generated, and the caller must png_error.
|
||||
*/
|
||||
static png_uint_32
|
||||
png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
|
||||
{
|
||||
png_const_charp orig_key = key;
|
||||
png_uint_32 key_len = 0;
|
||||
int bad_character = 0;
|
||||
int space = 1;
|
||||
|
||||
png_debug(1, "in png_check_keyword");
|
||||
|
||||
if (key == NULL)
|
||||
{
|
||||
*new_key = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
while (*key && key_len < 79)
|
||||
{
|
||||
png_byte ch = (png_byte)*key++;
|
||||
|
||||
if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/))
|
||||
*new_key++ = ch, ++key_len, space = 0;
|
||||
|
||||
else if (space == 0)
|
||||
{
|
||||
/* A space or an invalid character when one wasn't seen immediately
|
||||
* before; output just a space.
|
||||
*/
|
||||
*new_key++ = 32, ++key_len, space = 1;
|
||||
|
||||
/* If the character was not a space then it is invalid. */
|
||||
if (ch != 32)
|
||||
bad_character = ch;
|
||||
}
|
||||
|
||||
else if (bad_character == 0)
|
||||
bad_character = ch; /* just skip it, record the first error */
|
||||
}
|
||||
|
||||
if (key_len > 0 && space != 0) /* trailing space */
|
||||
{
|
||||
--key_len, --new_key;
|
||||
if (bad_character == 0)
|
||||
bad_character = 32;
|
||||
}
|
||||
|
||||
/* Terminate the keyword */
|
||||
*new_key = 0;
|
||||
|
||||
if (key_len == 0)
|
||||
return 0;
|
||||
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
/* Try to only output one warning per keyword: */
|
||||
if (*key != 0) /* keyword too long */
|
||||
png_warning(png_ptr, "keyword truncated");
|
||||
|
||||
else if (bad_character != 0)
|
||||
{
|
||||
PNG_WARNING_PARAMETERS(p)
|
||||
|
||||
png_warning_parameter(p, 1, orig_key);
|
||||
png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_02x, bad_character);
|
||||
|
||||
png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'");
|
||||
}
|
||||
#endif /* WARNINGS */
|
||||
|
||||
return key_len;
|
||||
}
|
||||
#endif /* WRITE_TEXT || WRITE_pCAL || WRITE_iCCP || WRITE_sPLT */
|
||||
|
||||
/* Write the IHDR chunk, and update the png_struct with the necessary
|
||||
* information. Note that the rest of this code depends upon this
|
||||
* information being correct.
|
||||
|
|
|
|||
Loading…
Reference in a new issue