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[libpng17] Imported from libpng-1.7.0beta87.tar

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Glenn Randers-Pehrson 2017-04-01 09:50:03 -05:00
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5
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.7.0beta87 - March 22, 2017 Libpng 1.7.0beta87 - April 1, 2017
This is not intended to be a public release. It will be replaced This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version. within a few weeks by a public version or by another test version.
@ -1423,12 +1423,13 @@ Version 1.7.0beta86 [December 29, 2016]
Fixed a potential null pointer dereference in png_set_text_2() (bug report Fixed a potential null pointer dereference in png_set_text_2() (bug report
and patch by Patrick Keshishian, CVE-2016-10087). and patch by Patrick Keshishian, CVE-2016-10087).
Version 1.7.0beta87 [March 22, 2017] Version 1.7.0beta87 [April 1, 2017]
Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna). Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna).
The contrib/examples/pngtopng.c recovery code was in the wrong "if" The contrib/examples/pngtopng.c recovery code was in the wrong "if"
branches; the comments were correct. branches; the comments were correct.
Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
makefile.linux and makefile.solaris-x86 (Cosmin). makefile.linux and makefile.solaris-x86 (Cosmin).
Merged some recent changes from libpng-1.6.30beta01.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit

3
CHANGES
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@ -5723,12 +5723,13 @@ Version 1.7.0beta86 [December 29, 2016]
Fixed a potential null pointer dereference in png_set_text_2() (bug report Fixed a potential null pointer dereference in png_set_text_2() (bug report
and patch by Patrick Keshishian, CVE-2016-10087). and patch by Patrick Keshishian, CVE-2016-10087).
Version 1.7.0beta87 [March 22, 2017] Version 1.7.0beta87 [April 1, 2017]
Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna). Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna).
The contrib/examples/pngtopng.c recovery code was in the wrong "if" The contrib/examples/pngtopng.c recovery code was in the wrong "if"
branches; the comments were correct. branches; the comments were correct.
Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
makefile.linux and makefile.solaris-x86 (Cosmin). makefile.linux and makefile.solaris-x86 (Cosmin).
Merged some recent changes from libpng-1.6.30beta01.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit

4
LICENSE
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@ -10,7 +10,7 @@ this sentence.
This code is released under the libpng license. This code is released under the libpng license.
libpng versions 1.0.7, July 1, 2000 through 1.7.0beta87, December 30, 2016 are libpng versions 1.0.7, July 1, 2000 through 1.7.0beta87, April 1, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, and are distributed according to the same derived from libpng-1.0.6, and are distributed according to the same
disclaimer and license as libpng-1.0.6 with the following individuals disclaimer and license as libpng-1.0.6 with the following individuals
@ -127,4 +127,4 @@ any encryption software. See the EAR, paragraphs 734.3(b)(3) and
Glenn Randers-Pehrson Glenn Randers-Pehrson
glennrp at users.sourceforge.net glennrp at users.sourceforge.net
December 30, 2016 April 1, 2017

4
README
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@ -1,4 +1,4 @@
README for libpng version 1.7.0beta87 - December 30, 2016 (shared library 17.0) README for libpng version 1.7.0beta87 - April 1, 2017 (shared library 17.0)
See the note about version numbers near the top of png.h See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng. See INSTALL for instructions on how to install libpng.
@ -90,7 +90,7 @@ You may also want a copy of the PNG specification. It is available
as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find
these at http://www.libpng.org/pub/png/documents/ these at http://www.libpng.org/pub/png/documents/
This code is currently being archived at libpng.sf.net in the This code is currently being archived at libpng.sourceforge.io in the
[DOWNLOAD] area, and at ftp://ftp.simplesystems.org. If you can't find it [DOWNLOAD] area, and at ftp://ftp.simplesystems.org. If you can't find it
in any of those places, e-mail me, and I'll help you find it. in any of those places, e-mail me, and I'll help you find it.

2
contrib/arm-neon/android-ndk.c
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@ -17,7 +17,7 @@
* *
* Documentation: * Documentation:
* http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html
* http://code.google.com/p/android/issues/detail?id=49065 * https://code.google.com/p/android/issues/detail?id=49065
* *
* NOTE: this requires that libpng is built against the Android NDK and linked * NOTE: this requires that libpng is built against the Android NDK and linked
* with an implementation of the Android ARM 'cpu-features' library. The code * with an implementation of the Android ARM 'cpu-features' library. The code

2
contrib/gregbook/README
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@ -55,7 +55,7 @@ mation and links to the latest version of the source code, and Chapters
13-15 of the book for detailed discussion of the three programs. 13-15 of the book for detailed discussion of the three programs.
Greg Roelofs Greg Roelofs
http://pobox.com/~newt/greg_contact.html https://pobox.com/~newt/greg_contact.html
16 March 2008 16 March 2008

2
contrib/tools/sRGB.h
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@ -14,7 +14,7 @@
* All routines take and return a floating point value in the range * All routines take and return a floating point value in the range
* 0 to 1.0, doing a calculation according to the sRGB specification * 0 to 1.0, doing a calculation according to the sRGB specification
* (in fact the source of the numbers is the wikipedia article at * (in fact the source of the numbers is the wikipedia article at
* http://en.wikipedia.org/wiki/SRGB). * https://en.wikipedia.org/wiki/SRGB).
*/ */
static double static double
sRGB_from_linear(double l) sRGB_from_linear(double l)

30
libpng-manual.txt
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@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.7.0beta87 - December 30, 2016 libpng version 1.7.0beta87 - April 1, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net> <glennrp at users.sourceforge.net>
Copyright (c) 1998-2015 Glenn Randers-Pehrson Copyright (c) 1998-2015 Glenn Randers-Pehrson
@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.7.0beta87 - December 30, 2016 libpng versions 0.97, January 1998, through 1.7.0beta87 - April 1, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2015 Glenn Randers-Pehrson Copyright (c) 1998-2015 Glenn Randers-Pehrson
@ -67,17 +67,17 @@ file format in application programs.
The PNG specification (second edition), November 2003, is available as The PNG specification (second edition), November 2003, is available as
a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at
<http://www.w3.org/TR/2003/REC-PNG-20031110/ <https://www.w3.org/TR/2003/REC-PNG-20031110/
The W3C and ISO documents have identical technical content. The W3C and ISO documents have identical technical content.
The PNG-1.2 specification is available at The PNG-1.2 specification is available at
<http://png-mng.sourceforge.net/pub/png/spec/1.2/>. <https://png-mng.sourceforge.io/pub/png/spec/1.2/>.
It is technically equivalent It is technically equivalent
to the PNG specification (second edition) but has some additional material. to the PNG specification (second edition) but has some additional material.
The PNG-1.0 specification is available as RFC 2083 The PNG-1.0 specification is available as RFC 2083
<http://png-mng.sourceforge.net/pub/png/spec/1.0/> and as a <https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a
W3C Recommendation <http://www.w3.org/TR/REC-png-961001>. W3C Recommendation <https://www.w3.org/TR/REC-png-961001>.
Some additional chunks are described in the special-purpose public chunks Some additional chunks are described in the special-purpose public chunks
documents at <http://www.libpng.org/pub/png/spec/register/> documents at <http://www.libpng.org/pub/png/spec/register/>
@ -4050,7 +4050,7 @@ READ APIs
When the simplified API needs to convert between sRGB and linear colorspaces, When the simplified API needs to convert between sRGB and linear colorspaces,
the actual sRGB transfer curve defined in the sRGB specification (see the the actual sRGB transfer curve defined in the sRGB specification (see the
article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2 article at https://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
approximation used elsewhere in libpng. approximation used elsewhere in libpng.
WRITE APIS WRITE APIS
@ -4227,7 +4227,7 @@ However, there are some uncertainties about the status of local variables
after a longjmp, so the user may want to be careful about doing anything after a longjmp, so the user may want to be careful about doing anything
after setjmp returns non-zero besides returning itself. Consult your after setjmp returns non-zero besides returning itself. Consult your
compiler documentation for more details. For an alternative approach, you compiler documentation for more details. For an alternative approach, you
may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net), may wish to use the "cexcept" facility (see https://cexcept.sourceforge.io/),
which is illustrated in pngvalid.c and in contrib/visupng. which is illustrated in pngvalid.c and in contrib/visupng.
Beginning in libpng-1.4.0, the png_set_benign_errors() API became available. Beginning in libpng-1.4.0, the png_set_benign_errors() API became available.
@ -4447,7 +4447,7 @@ in a MNG datastream. As a minimum, it must have the MNG 8-byte signature
and the MHDR and MEND chunks. Libpng does not provide support for these and the MHDR and MEND chunks. Libpng does not provide support for these
or any other MNG chunks; your application must provide its own support for or any other MNG chunks; your application must provide its own support for
them. You may wish to consider using libmng (available at them. You may wish to consider using libmng (available at
http://www.libmng.com) instead. https://www.libmng.com/) instead.
VIII. Changes to Libpng from version 0.88 VIII. Changes to Libpng from version 0.88
@ -5189,7 +5189,7 @@ control. The git repository was built from old libpng-x.y.z.tar.gz files
going back to version 0.70. You can access the git repository (read only) going back to version 0.70. You can access the git repository (read only)
at at
git://git.code.sf.net/p/libpng/code https://git.code.sf.net/p/libpng/code.git
or you can browse it with a web browser by selecting the "code" button at or you can browse it with a web browser by selecting the "code" button at
@ -5199,7 +5199,7 @@ Patches can be sent to glennrp at users.sourceforge.net or to
png-mng-implement at lists.sourceforge.net or you can upload them to png-mng-implement at lists.sourceforge.net or you can upload them to
the libpng bug tracker at the libpng bug tracker at
http://libpng.sourceforge.net https://libpng.sourceforge.io/
We also accept patches built from the tar or zip distributions, and We also accept patches built from the tar or zip distributions, and
simple verbal discriptions of bug fixes, reported either to the simple verbal discriptions of bug fixes, reported either to the
@ -5209,7 +5209,7 @@ mailing list, or directly to glennrp.
XVI. Coding style XVI. Coding style
Our coding style is similar to the "Allman" style Our coding style is similar to the "Allman" style
(See http://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly (See https://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
braces on separate lines: braces on separate lines:
if (condition) if (condition)
@ -5323,7 +5323,7 @@ Prior to libpng-1.6.0 we used a "png_sizeof()" macro, formatted as
though it were a function. though it were a function.
Control keywords if, for, while, and switch are always followed by a space Control keywords if, for, while, and switch are always followed by a space
to distinguish them from function calls, which have no trailing space. to distinguish them from function calls, which have no trailing space.
We put a space after each comma and after each semicolon We put a space after each comma and after each semicolon
in "for" statements, and we put spaces before and after each in "for" statements, and we put spaces before and after each
@ -5347,7 +5347,7 @@ for a few type names that we inherit from zlib.h.
We prefer "if (something != 0)" and "if (something == 0)" over We prefer "if (something != 0)" and "if (something == 0)" over
"if (something)" and if "(!something)", respectively, and for pointers "if (something)" and if "(!something)", respectively, and for pointers
we prefer "if (some_pointer != NULL)" or "if (some_pointer == NULL)". we prefer "if (some_pointer != NULL)" or "if (some_pointer == NULL)".
We do not use the TAB character for indentation in the C sources. We do not use the TAB character for indentation in the C sources.

38
libpng.3
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@ -1,4 +1,4 @@
.TH LIBPNG 3 "December 30, 2016" .TH LIBPNG 3 "April 1, 2017"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta87 libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta87
.SH SYNOPSIS .SH SYNOPSIS
@ -500,7 +500,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
.SH LIBPNG.TXT .SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.7.0beta87 - December 30, 2016 libpng version 1.7.0beta87 - April 1, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net> <glennrp at users.sourceforge.net>
Copyright (c) 1998-2015 Glenn Randers-Pehrson Copyright (c) 1998-2015 Glenn Randers-Pehrson
@ -511,7 +511,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.7.0beta87 - December 30, 2016 libpng versions 0.97, January 1998, through 1.7.0beta87 - April 1, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2015 Glenn Randers-Pehrson Copyright (c) 1998-2015 Glenn Randers-Pehrson
@ -567,17 +567,17 @@ file format in application programs.
The PNG specification (second edition), November 2003, is available as The PNG specification (second edition), November 2003, is available as
a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at
<http://www.w3.org/TR/2003/REC-PNG-20031110/ <https://www.w3.org/TR/2003/REC-PNG-20031110/
The W3C and ISO documents have identical technical content. The W3C and ISO documents have identical technical content.
The PNG-1.2 specification is available at The PNG-1.2 specification is available at
<http://png-mng.sourceforge.net/pub/png/spec/1.2/>. <https://png-mng.sourceforge.io/pub/png/spec/1.2/>.
It is technically equivalent It is technically equivalent
to the PNG specification (second edition) but has some additional material. to the PNG specification (second edition) but has some additional material.
The PNG-1.0 specification is available as RFC 2083 The PNG-1.0 specification is available as RFC 2083
<http://png-mng.sourceforge.net/pub/png/spec/1.0/> and as a <https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a
W3C Recommendation <http://www.w3.org/TR/REC-png-961001>. W3C Recommendation <https://www.w3.org/TR/REC-png-961001>.
Some additional chunks are described in the special-purpose public chunks Some additional chunks are described in the special-purpose public chunks
documents at <http://www.libpng.org/pub/png/spec/register/> documents at <http://www.libpng.org/pub/png/spec/register/>
@ -4550,7 +4550,7 @@ READ APIs
When the simplified API needs to convert between sRGB and linear colorspaces, When the simplified API needs to convert between sRGB and linear colorspaces,
the actual sRGB transfer curve defined in the sRGB specification (see the the actual sRGB transfer curve defined in the sRGB specification (see the
article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2 article at https://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
approximation used elsewhere in libpng. approximation used elsewhere in libpng.
WRITE APIS WRITE APIS
@ -4727,7 +4727,7 @@ However, there are some uncertainties about the status of local variables
after a longjmp, so the user may want to be careful about doing anything after a longjmp, so the user may want to be careful about doing anything
after setjmp returns non-zero besides returning itself. Consult your after setjmp returns non-zero besides returning itself. Consult your
compiler documentation for more details. For an alternative approach, you compiler documentation for more details. For an alternative approach, you
may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net), may wish to use the "cexcept" facility (see https://cexcept.sourceforge.io/),
which is illustrated in pngvalid.c and in contrib/visupng. which is illustrated in pngvalid.c and in contrib/visupng.
Beginning in libpng-1.4.0, the png_set_benign_errors() API became available. Beginning in libpng-1.4.0, the png_set_benign_errors() API became available.
@ -4947,7 +4947,7 @@ in a MNG datastream. As a minimum, it must have the MNG 8-byte signature
and the MHDR and MEND chunks. Libpng does not provide support for these and the MHDR and MEND chunks. Libpng does not provide support for these
or any other MNG chunks; your application must provide its own support for or any other MNG chunks; your application must provide its own support for
them. You may wish to consider using libmng (available at them. You may wish to consider using libmng (available at
http://www.libmng.com) instead. https://www.libmng.com/) instead.
.SH VIII. Changes to Libpng from version 0.88 .SH VIII. Changes to Libpng from version 0.88
@ -5689,7 +5689,7 @@ control. The git repository was built from old libpng-x.y.z.tar.gz files
going back to version 0.70. You can access the git repository (read only) going back to version 0.70. You can access the git repository (read only)
at at
git://git.code.sf.net/p/libpng/code https://git.code.sf.net/p/libpng/code.git
or you can browse it with a web browser by selecting the "code" button at or you can browse it with a web browser by selecting the "code" button at
@ -5699,7 +5699,7 @@ Patches can be sent to glennrp at users.sourceforge.net or to
png-mng-implement at lists.sourceforge.net or you can upload them to png-mng-implement at lists.sourceforge.net or you can upload them to
the libpng bug tracker at the libpng bug tracker at
http://libpng.sourceforge.net https://libpng.sourceforge.io/
We also accept patches built from the tar or zip distributions, and We also accept patches built from the tar or zip distributions, and
simple verbal discriptions of bug fixes, reported either to the simple verbal discriptions of bug fixes, reported either to the
@ -5709,7 +5709,7 @@ mailing list, or directly to glennrp.
.SH XVI. Coding style .SH XVI. Coding style
Our coding style is similar to the "Allman" style Our coding style is similar to the "Allman" style
(See http://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly (See https://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
braces on separate lines: braces on separate lines:
if (condition) if (condition)
@ -5823,7 +5823,7 @@ Prior to libpng-1.6.0 we used a "png_sizeof()" macro, formatted as
though it were a function. though it were a function.
Control keywords if, for, while, and switch are always followed by a space Control keywords if, for, while, and switch are always followed by a space
to distinguish them from function calls, which have no trailing space. to distinguish them from function calls, which have no trailing space.
We put a space after each comma and after each semicolon We put a space after each comma and after each semicolon
in "for" statements, and we put spaces before and after each in "for" statements, and we put spaces before and after each
@ -5847,7 +5847,7 @@ for a few type names that we inherit from zlib.h.
We prefer "if (something != 0)" and "if (something == 0)" over We prefer "if (something != 0)" and "if (something == 0)" over
"if (something)" and if "(!something)", respectively, and for pointers "if (something)" and if "(!something)", respectively, and for pointers
we prefer "if (some_pointer != NULL)" or "if (some_pointer == NULL)". we prefer "if (some_pointer != NULL)" or "if (some_pointer == NULL)".
We do not use the TAB character for indentation in the C sources. We do not use the TAB character for indentation in the C sources.
@ -6020,7 +6020,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation. Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.7.0beta87 - December 30, 2016: Libpng version 1.7.0beta87 - April 1, 2017:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net). Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@ -6045,7 +6045,7 @@ this sentence.
This code is released under the libpng license. This code is released under the libpng license.
libpng versions 1.0.7, July 1, 2000 through 1.7.0beta87, December 30, 2016 are libpng versions 1.0.7, July 1, 2000 through 1.7.0beta87, April 1, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, and are distributed according to the same derived from libpng-1.0.6, and are distributed according to the same
disclaimer and license as libpng-1.0.6 with the following individuals disclaimer and license as libpng-1.0.6 with the following individuals
@ -6170,7 +6170,7 @@ files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
Glenn Randers-Pehrson Glenn Randers-Pehrson
glennrp at users.sourceforge.net glennrp at users.sourceforge.net
December 30, 2016 April 1, 2017
.\" end of man page .\" end of man page

2
libpngpf.3
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@ -1,4 +1,4 @@
.TH LIBPNGPF 3 "December 30, 2016" .TH LIBPNGPF 3 "April 1, 2017"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta87 libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta87
(private functions) (private functions)

10
png.5
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@ -1,4 +1,4 @@
.TH PNG 5 "December 30, 2016" .TH PNG 5 "April 1, 2017"
.SH NAME .SH NAME
png \- Portable Network Graphics (PNG) format png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION .SH DESCRIPTION
@ -23,12 +23,12 @@ platforms.
PNG specification (second edition), November 2003: PNG specification (second edition), November 2003:
.IP .IP
.br .br
<http://www.w3.org/TR/2003/REC-PNG-20031110/ <https://www.w3.org/TR/2003/REC-PNG-20031110/
.LP .LP
PNG 1.2 specification, July 1999: PNG 1.2 specification, July 1999:
.IP .IP
.br .br
http://png-mng.sourceforge.net/pub/png/spec/1.2/ https://png-mng.sourceforge.io/pub/png/spec/1.2/
.LP .LP
PNG 1.0 specification, October 1996: PNG 1.0 specification, October 1996:
.IP .IP
@ -36,11 +36,11 @@ PNG 1.0 specification, October 1996:
RFC 2083 RFC 2083
.IP .IP
.br .br
http://www.ietf.org/rfc/rfc2083.txt https://www.ietf.org/rfc/rfc2083.txt
.br .br
or (as a W3C Recommendation) at or (as a W3C Recommendation) at
.br .br
http://www.w3.org/TR/REC-png-961001 https://www.w3.org/TR/REC-png-961001
.SH AUTHORS .SH AUTHORS
This man page: Glenn Randers-Pehrson This man page: Glenn Randers-Pehrson
.LP .LP

32
png.c
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@ -705,14 +705,14 @@ png_get_copyright(png_const_structrp png_ptr)
#else #else
# ifdef __STDC__ # ifdef __STDC__
return PNG_STRING_NEWLINE \ return PNG_STRING_NEWLINE \
"libpng version 1.7.0beta87 - December 30, 2016" PNG_STRING_NEWLINE \ "libpng version 1.7.0beta87 - April 1, 2017" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \ "Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \
PNG_STRING_NEWLINE \ PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE; PNG_STRING_NEWLINE;
# else # else
return "libpng version 1.7.0beta87 - December 30, 2016\ return "libpng version 1.7.0beta87 - April 1, 2017\
Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson\ Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\ Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@ -2791,7 +2791,7 @@ png_pow10(int power)
if (power < 0) if (power < 0)
{ {
if (power < DBL_MIN_10_EXP) return 0; if (power < DBL_MIN_10_EXP) return 0;
recip = 1, power = -power; recip = 1; power = -power;
} }
if (power > 0) if (power > 0)
@ -2869,7 +2869,9 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
double test = png_pow10(exp_b10+1); double test = png_pow10(exp_b10+1);
if (test <= DBL_MAX) if (test <= DBL_MAX)
++exp_b10, base = test; {
++exp_b10; base = test;
}
else else
break; break;
@ -2883,7 +2885,10 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
* test on DBL_MAX above. * test on DBL_MAX above.
*/ */
fp /= base; fp /= base;
while (fp >= 1) fp /= 10, ++exp_b10; while (fp >= 1)
{
fp /= 10; ++exp_b10;
}
/* Because of the code above fp may, at this point, be /* Because of the code above fp may, at this point, be
* less than .1, this is ok because the code below can * less than .1, this is ok because the code below can
@ -2934,7 +2939,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
/* Rounding up to 10, handle that here. */ /* Rounding up to 10, handle that here. */
if (czero > 0) if (czero > 0)
{ {
--czero, d = 1; --czero; d = 1;
if (cdigits == 0) --clead; if (cdigits == 0) --clead;
} }
else else
@ -2948,7 +2953,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
else if (ch == 46) else if (ch == 46)
{ {
ch = *--ascii, ++size; ch = *--ascii; ++size;
/* Advance exp_b10 to '1', so that the /* Advance exp_b10 to '1', so that the
* decimal point happens after the * decimal point happens after the
* previous digit. * previous digit.
@ -2975,7 +2980,9 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
int ch = *--ascii; int ch = *--ascii;
if (ch == 46) if (ch == 46)
++size, exp_b10 = 1; {
++size; exp_b10 = 1;
}
/* Else lost a leading zero, so 'exp_b10' is /* Else lost a leading zero, so 'exp_b10' is
* still ok at (-1) * still ok at (-1)
@ -3066,7 +3073,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
*/ */
size -= cdigits; size -= cdigits;
*ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision */ *ascii++ = 69; --size; /* 'E': PLUS 1 TOTAL 2+precision */
/* The following use of an unsigned temporary avoids ambiguities in /* The following use of an unsigned temporary avoids ambiguities in
* the signed arithmetic on exp_b10 and permits GCC at least to do * the signed arithmetic on exp_b10 and permits GCC at least to do
@ -3182,7 +3189,10 @@ png_ascii_from_fixed(png_const_structrp png_ptr, png_charp ascii,
* then ndigits digits to first: * then ndigits digits to first:
*/ */
i = 5; i = 5;
while (ndigits < i) *ascii++ = 48, --i; while (ndigits < i)
{
*ascii++ = 48; --i;
}
while (ndigits >= first) *ascii++ = digits[--ndigits]; while (ndigits >= first) *ascii++ = digits[--ndigits];
/* Don't output the trailing zeros! */ /* Don't output the trailing zeros! */
} }
@ -3486,7 +3496,7 @@ png_setting(png_structrp png_ptr, png_uint_32 setting, png_uint_32 parameter,
defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
/* sRGB conversion tables; these are machine generated with the code in /* sRGB conversion tables; these are machine generated with the code in
* contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the * contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the
* specification (see the article at http://en.wikipedia.org/wiki/SRGB) * specification (see the article at https://en.wikipedia.org/wiki/SRGB)
* is used, not the gamma=1/2.2 approximation use elsewhere in libpng. * is used, not the gamma=1/2.2 approximation use elsewhere in libpng.
* The sRGB to linear table is exact (to the nearest 16-bit linear fraction). * The sRGB to linear table is exact (to the nearest 16-bit linear fraction).
* The inverse (linear to sRGB) table has accuracies as follows: * The inverse (linear to sRGB) table has accuracies as follows:

14
png.h
View File

@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library /* png.h - header file for PNG reference library
* *
* libpng version 1.7.0beta87, December 30, 2016 * libpng version 1.7.0beta87, April 1, 2017
* *
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -12,7 +12,7 @@
* Authors and maintainers: * Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger * libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.7.0beta87, December 30, 2016: * libpng versions 0.97, January 1998, through 1.7.0beta87, April 1, 2017:
* Glenn Randers-Pehrson. * Glenn Randers-Pehrson.
* See also "Contributing Authors", below. * See also "Contributing Authors", below.
*/ */
@ -25,7 +25,7 @@
* *
* This code is released under the libpng license. * This code is released under the libpng license.
* *
* libpng versions 1.0.7, July 1, 2000 through 1.7.0beta87, December 30, 2016 are * libpng versions 1.0.7, July 1, 2000 through 1.7.0beta87, April 1, 2017 are
* Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are * Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
* derived from libpng-1.0.6, and are distributed according to the same * derived from libpng-1.0.6, and are distributed according to the same
* disclaimer and license as libpng-1.0.6 with the following individuals * disclaimer and license as libpng-1.0.6 with the following individuals
@ -234,14 +234,14 @@
* *
* See libpng.txt or libpng.3 for more information. The PNG specification * See libpng.txt or libpng.3 for more information. The PNG specification
* is available as a W3C Recommendation and as an ISO Specification, * is available as a W3C Recommendation and as an ISO Specification,
* <http://www.w3.org/TR/2003/REC-PNG-20031110/ * <https://www.w3.org/TR/2003/REC-PNG-20031110/
*/ */
/* /*
* Y2K compliance in libpng: * Y2K compliance in libpng:
* ========================= * =========================
* *
* December 30, 2016 * April 1, 2017
* *
* Since the PNG Development group is an ad-hoc body, we can't make * Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration. * an official declaration.
@ -310,7 +310,7 @@
/* Version information for png.h - this should match the version in png.c */ /* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.7.0beta87" #define PNG_LIBPNG_VER_STRING "1.7.0beta87"
#define PNG_HEADER_VERSION_STRING " libpng version 1.7.0beta87 - December 30, 2016\n" #define PNG_HEADER_VERSION_STRING " libpng version 1.7.0beta87 - April 1, 2017\n"
#define PNG_LIBPNG_VER_SONUM 17 #define PNG_LIBPNG_VER_SONUM 17
#define PNG_LIBPNG_VER_DLLNUM 17 #define PNG_LIBPNG_VER_DLLNUM 17
@ -3405,7 +3405,7 @@ typedef struct
* *
* When the simplified API needs to convert between sRGB and linear colorspaces, * When the simplified API needs to convert between sRGB and linear colorspaces,
* the actual sRGB transfer curve defined in the sRGB specification (see the * the actual sRGB transfer curve defined in the sRGB specification (see the
* article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2 * article at https://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
* approximation used elsewhere in libpng. * approximation used elsewhere in libpng.
* *
* When an alpha channel is present it is expected to denote pixel coverage * When an alpha channel is present it is expected to denote pixel coverage

2
pngconf.h
View File

@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng /* pngconf.h - machine configurable file for libpng
* *
* libpng version 1.7.0beta87, December 30, 2016 * libpng version 1.7.0beta87, April 1, 2017
* *
* Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

15
pngrutil.c
View File

@ -3549,7 +3549,10 @@ png_read_filter_row_paeth_1byte_pixel(png_alloc_size_t row_bytes,
/* Find the best predictor, the least of pa, pb, pc favoring the earlier /* Find the best predictor, the least of pa, pb, pc favoring the earlier
* ones in the case of a tie. * ones in the case of a tie.
*/ */
if (pb < pa) pa = pb, a = b; if (pb < pa)
{
pa = pb; a = b;
}
if (pc < pa) a = c; if (pc < pa) a = c;
/* Calculate the current pixel in a, and move the previous row pixel to c /* Calculate the current pixel in a, and move the previous row pixel to c
@ -3594,7 +3597,10 @@ png_read_filter_row_paeth_multibyte_pixel(png_alloc_size_t row_bytes,
pc = (p + pc) < 0 ? -(p + pc) : p + pc; pc = (p + pc) < 0 ? -(p + pc) : p + pc;
# endif # endif
if (pb < pa) pa = pb, a = b; if (pb < pa)
{
pa = pb; a = b;
}
if (pc < pa) a = c; if (pc < pa) a = c;
a = 0xFFU & (a + *row); a = 0xFFU & (a + *row);
@ -3626,7 +3632,10 @@ png_read_filter_row_paeth_multibyte_pixel(png_alloc_size_t row_bytes,
pc = (p + pc) < 0 ? -(p + pc) : p + pc; pc = (p + pc) < 0 ? -(p + pc) : p + pc;
# endif # endif
if (pb < pa) pa = pb, a = b; if (pb < pa)
{
pa = pb; a = b;
}
if (pc < pa) a = c; if (pc < pa) a = c;
a = 0xFFU & (a + *row); a = 0xFFU & (a + *row);

3
pngset.c
View File

@ -1208,8 +1208,9 @@ png_set_sPLT(png_structrp png_ptr,
info_ptr->valid |= PNG_INFO_sPLT; info_ptr->valid |= PNG_INFO_sPLT;
++(info_ptr->splt_palettes_num); ++(info_ptr->splt_palettes_num);
++np; ++np;
++entries;
} }
while (++entries, --nentries); while (--nentries);
if (nentries > 0) if (nentries > 0)
png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR); png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR);

2
projects/owatcom/pngconfig.mak
View File

@ -126,7 +126,7 @@ $# to work, download Brian Kernighan's awk (Brian Kernighan is the author of
$# awk.) You can find source code and a built executable (called awk95.exe) $# awk.) You can find source code and a built executable (called awk95.exe)
$# here: $# here:
$# $#
$# http://www.cs.princeton.edu/~bwk/btl.mirror/ $# https://www.cs.princeton.edu/~bwk/btl.mirror/
$# $#
$# The executable works just fine. $# The executable works just fine.
$# $#

2
projects/vstudio/README.txt
View File

@ -1,7 +1,7 @@
VisualStudio instructions VisualStudio instructions
libpng version 1.7.0beta87 - December 30, 2016 libpng version 1.7.0beta87 - April 1, 2017
Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson

2
projects/vstudio/zlib.props
View File

@ -2,7 +2,7 @@
<!-- <!--
* zlib.props - location of zlib source * zlib.props - location of zlib source
* *
* libpng version 1.7.0beta87 - December 30, 2016 * libpng version 1.7.0beta87 - April 1, 2017
* *
* Copyright (c) 2011,2013,2014 Glenn Randers-Pehrson * Copyright (c) 2011,2013,2014 Glenn Randers-Pehrson
* *

2
scripts/README.txt
View File

@ -1,5 +1,5 @@
Makefiles for libpng version 1.7.0beta87 - December 30, 2016 Makefiles for libpng version 1.7.0beta87 - April 1, 2017
pnglibconf.h.prebuilt => Stores configuration settings pnglibconf.h.prebuilt => Stores configuration settings
makefile.linux => Linux/ELF makefile makefile.linux => Linux/ELF makefile

2
scripts/pnglibconf.h.prebuilt
View File

@ -2,7 +2,7 @@
/* pnglibconf.h - library build configuration */ /* pnglibconf.h - library build configuration */
/* libpng version 1.7.0beta87, December 30, 2016 */ /* libpng version 1.7.0beta87, April 1, 2017 */
/* Copyright (c) 1998-2016 Glenn Randers-Pehrson */ /* Copyright (c) 1998-2016 Glenn Randers-Pehrson */