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Update bundled libpng to version 1.6.36 

The remaining diff to clean 1.6.36 is archived in the qtpatches.diff file.

[ChangeLog][Third-Party Code] libpng was updated to version 1.6.36

Change-Id: Ia9d20c5abca115d509ed0aaf9eebfc85a88bef1d
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
bb10
André Klitzing 2018-12-27 09:51:50 +01:00
parent 61af5abb33
commit 5d8b01468e
28 changed files with 627 additions and 632 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
src/3rdparty/libpng/ANNOUNCE vendored
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@ -1,48 +1,77 @@
Libpng 1.6.35 - July 15, 2018
libpng 1.6.36 - December 1, 2018
================================
This is a public release of libpng, intended for use in production code.
Files available for download:
Files available for download
----------------------------
Source files with LF line endings (for Unix/Linux):
libpng-1.6.35.tar.xz (LZMA-compressed, recommended)
libpng-1.6.35.tar.gz
* libpng-1.6.36.tar.xz (LZMA-compressed, recommended)
* libpng-1.6.36.tar.gz
Source files with CRLF line endings (for Windows):
lp1635.7z (LZMA-compressed, recommended)
lp1635.zip
* lp1636.7z (LZMA-compressed, recommended)
* lp1636.zip
Other information:
libpng-1.6.35-README.txt
libpng-1.6.35-LICENSE.txt
* README.md
* LICENSE.md
* AUTHORS.md
* TRADEMARK.md
Changes since the last public release (1.6.34):
Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
Added calls to png_set_*() transforms commonly used by browsers to
the fuzzer.
Removed some unnecessary brackets in pngrtran.c
Fixed miscellaneous typos (Patch by github user "luzpaz").
Change "ASM C" to "C ASM" in CMakeLists.txt
Fixed incorrect handling of bKGD chunk in sub-8-bit files (Cosmin)
Added hardware optimization directories to zip and 7z distributions.
Fixed incorrect bitmask for options.
Fixed many spelling typos.
Make png_get_iCCP consistent with man page (allow compression-type argument
to be NULL, bug report by Lenard Szolnoki).
Replaced the remaining uses of png_size_t with size_t (Cosmin)
Fixed the calculation of row_factor in png_check_chunk_length
(reported by Thuan Pham in SourceForge issue #278)
Added missing parentheses to a macro definition
(suggested by "irwir" in GitHub issue #216)
IMPORTANT licensing update: libpng license v2
---------------------------------------------
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
The new libpng license comprises the terms and conditions from the zlib
license, and the disclaimer from the Boost license.
The legacy libpng license, used until libpng-1.6.35, is appended to the
new license, following the precedent established in the Python Software
Foundation License version 2.
From now on, the list of contributing authors shall be maintained in a
separate AUTHORS file. The lists of previous contributing authors,
mentioned in the legacy libpng license and considered to be an integral
part of that license, are kept intact, with no further updates.
Changes since the previous public release (version 1.6.35)
----------------------------------------------------------
* Optimized png_do_expand_palette for ARM processors.
Improved performance by around 10-22% on a recent ARM Chromebook.
(Contributed by Richard Townsend, ARM Holdings)
* Fixed manipulation of machine-specific optimization options.
(Contributed by Vicki Pfau)
* Used memcpy instead of manual pointer arithmetic on Intel SSE2.
(Contributed by Samuel Williams)
* Fixed build errors with MSVC on ARM64.
(Contributed by Zhijie Liang)
* Fixed detection of libm in CMakeLists.
(Contributed by Cameron Cawley)
* Fixed incorrect creation of pkg-config file in CMakeLists.
(Contributed by Kyle Bentley)
* Fixed the CMake build on Windows MSYS by avoiding symlinks.
* Fixed a build warning on OpenBSD.
(Contributed by Theo Buehler)
* Fixed various typos in comments.
(Contributed by "luz.paz")
* Raised the minimum required CMake version from 3.0.2 to 3.1.
* Removed yet more of the vestigial support for pre-ANSI C compilers.
* Removed ancient makefiles for ancient systems that have been broken
across all previous libpng-1.6.x versions.
* Removed the Y2K compliance statement and the export control
information.
* Applied various code style and documentation fixes.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
Subscription is required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe).
Glenn R-P
to subscribe.

29
src/3rdparty/libpng/CHANGES vendored
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@ -6063,9 +6063,34 @@ Version 1.6.35 [July 15, 2018]
Added missing parentheses to a macro definition
(suggested by "irwir" in GitHub issue #216)
Version 1.6.36 [December 1, 2018]
Optimized png_do_expand_palette for ARM processors.
Improved performance by around 10-22% on a recent ARM Chromebook.
(Contributed by Richard Townsend, ARM Holdings)
Fixed manipulation of machine-specific optimization options.
(Contributed by Vicki Pfau)
Used memcpy instead of manual pointer arithmetic on Intel SSE2.
(Contributed by Samuel Williams)
Fixed build errors with MSVC on ARM64.
(Contributed by Zhijie Liang)
Fixed detection of libm in CMakeLists.
(Contributed by Cameron Cawley)
Fixed incorrect creation of pkg-config file in CMakeLists.
(Contributed by Kyle Bentley)
Fixed the CMake build on Windows MSYS by avoiding symlinks.
Fixed a build warning on OpenBSD.
(Contributed by Theo Buehler)
Fixed various typos in comments.
(Contributed by "luz.paz")
Raised the minimum required CMake version from 3.0.2 to 3.1.
Removed yet more of the vestigial support for pre-ANSI C compilers.
Removed ancient makefiles for ancient systems that have been broken
across all previous libpng-1.6.x versions.
Removed the Y2K compliance statement and the export control
information.
Applied various code style and documentation fixes.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe).
Glenn R-P

173
src/3rdparty/libpng/LICENSE vendored
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@ -1,14 +1,43 @@
COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
=========================================
This copy of the libpng notices is provided for your convenience. In case of
any discrepancy between this copy and the notices in the file png.h that is
included in the libpng distribution, the latter shall prevail.
PNG Reference Library License version 2
---------------------------------------
COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
* Copyright (c) 1995-2018 The PNG Reference Library Authors.
* Copyright (c) 2018 Cosmin Truta.
* Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson.
* Copyright (c) 1996-1997 Andreas Dilger.
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
If you modify libpng you may insert additional notices immediately following
this sentence.
The software is supplied "as is", without warranty of any kind,
express or implied, including, without limitation, the warranties
of merchantability, fitness for a particular purpose, title, and
non-infringement. In no even shall the Copyright owners, or
anyone distributing the software, be liable for any damages or
other liability, whether in contract, tort or otherwise, arising
from, out of, or in connection with the software, or the use or
other dealings in the software, even if advised of the possibility
of such damage.
This code is released under the libpng license.
Permission is hereby granted to use, copy, modify, and distribute
this software, or portions hereof, for any purpose, without fee,
subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you
use this software in a product, an acknowledgment in the product
documentation would be appreciated, but is not required.
2. Altered source versions must be plainly marked as such, and must
not be misrepresented as being the original software.
3. This Copyright notice may not be removed or altered from any
source or altered source distribution.
PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35)
-----------------------------------------------------------------------
libpng versions 1.0.7, July 1, 2000 through 1.6.35, July 15, 2018 are
Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are
@ -16,38 +45,38 @@ 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
added to the list of Contributing Authors:
Simon-Pierre Cadieux
Eric S. Raymond
Mans Rullgard
Cosmin Truta
Gilles Vollant
James Yu
Mandar Sahastrabuddhe
Google Inc.
Vadim Barkov
Simon-Pierre Cadieux
Eric S. Raymond
Mans Rullgard
Cosmin Truta
Gilles Vollant
James Yu
Mandar Sahastrabuddhe
Google Inc.
Vadim Barkov
and with the following additions to the disclaimer:
There is no warranty against interference with your enjoyment of the
library or against infringement. There is no warranty that our
efforts or the library will fulfill any of your particular purposes
or needs. This library is provided with all faults, and the entire
risk of satisfactory quality, performance, accuracy, and effort is with
the user.
There is no warranty against interference with your enjoyment of
the library or against infringement. There is no warranty that our
efforts or the library will fulfill any of your particular purposes
or needs. This library is provided with all faults, and the entire
risk of satisfactory quality, performance, accuracy, and effort is
with the user.
Some files in the "contrib" directory and some configure-generated
files that are distributed with libpng have other copyright owners and
files that are distributed with libpng have other copyright owners, and
are released under other open source licenses.
libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
libpng-0.96, and are distributed according to the same disclaimer and
license as libpng-0.96, with the following individuals added to the list
of Contributing Authors:
license as libpng-0.96, with the following individuals added to the
list of Contributing Authors:
Tom Lane
Glenn Randers-Pehrson
Willem van Schaik
Tom Lane
Glenn Randers-Pehrson
Willem van Schaik
libpng versions 0.89, June 1996, through 0.96, May 1997, are
Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
@ -55,14 +84,14 @@ and are distributed according to the same disclaimer and license as
libpng-0.88, with the following individuals added to the list of
Contributing Authors:
John Bowler
Kevin Bracey
Sam Bushell
Magnus Holmgren
Greg Roelofs
Tom Tanner
John Bowler
Kevin Bracey
Sam Bushell
Magnus Holmgren
Greg Roelofs
Tom Tanner
Some files in the "scripts" directory have other copyright owners
Some files in the "scripts" directory have other copyright owners,
but are released under this license.
libpng versions 0.5, May 1995, through 0.88, January 1996, are
@ -71,63 +100,35 @@ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
For the purposes of this copyright and license, "Contributing Authors"
is defined as the following set of individuals:
Andreas Dilger
Dave Martindale
Guy Eric Schalnat
Paul Schmidt
Tim Wegner
Andreas Dilger
Dave Martindale
Guy Eric Schalnat
Paul Schmidt
Tim Wegner
The PNG Reference Library is supplied "AS IS". The Contributing Authors
and Group 42, Inc. disclaim all warranties, expressed or implied,
including, without limitation, the warranties of merchantability and of
fitness for any purpose. The Contributing Authors and Group 42, Inc.
assume no liability for direct, indirect, incidental, special, exemplary,
or consequential damages, which may result from the use of the PNG
Reference Library, even if advised of the possibility of such damage.
The PNG Reference Library is supplied "AS IS". The Contributing
Authors and Group 42, Inc. disclaim all warranties, expressed or
implied, including, without limitation, the warranties of
merchantability and of fitness for any purpose. The Contributing
Authors and Group 42, Inc. assume no liability for direct, indirect,
incidental, special, exemplary, or consequential damages, which may
result from the use of the PNG Reference Library, even if advised of
the possibility of such damage.
Permission is hereby granted to use, copy, modify, and distribute this
source code, or portions hereof, for any purpose, without fee, subject
to the following restrictions:
1. The origin of this source code must not be misrepresented.
1. The origin of this source code must not be misrepresented.
2. Altered versions must be plainly marked as such and must not
be misrepresented as being the original source.
2. Altered versions must be plainly marked as such and must not
be misrepresented as being the original source.
3. This Copyright notice may not be removed or altered from any
source or altered source distribution.
3. This Copyright notice may not be removed or altered from any
source or altered source distribution.
The Contributing Authors and Group 42, Inc. specifically permit, without
fee, and encourage the use of this source code as a component to
supporting the PNG file format in commercial products. If you use this
source code in a product, acknowledgment is not required but would be
appreciated.
END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
TRADEMARK:
The name "libpng" has not been registered by the Copyright owner
as a trademark in any jurisdiction. However, because libpng has
been distributed and maintained world-wide, continually since 1995,
the Copyright owner claims "common-law trademark protection" in any
jurisdiction where common-law trademark is recognized.
OSI CERTIFICATION:
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
a certification mark of the Open Source Initiative. OSI has not addressed
the additional disclaimers inserted at version 1.0.7.
EXPORT CONTROL:
The Copyright owner believes that the Export Control Classification
Number (ECCN) for libpng is EAR99, which means not subject to export
controls or International Traffic in Arms Regulations (ITAR) because
it is open source, publicly available software, that does not contain
any encryption software. See the EAR, paragraphs 734.3(b)(3) and
734.7(b).
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
July 15, 2018
The Contributing Authors and Group 42, Inc. specifically permit,
without fee, and encourage the use of this source code as a component
to supporting the PNG file format in commercial products. If you use
this source code in a product, acknowledgment is not required but would
be appreciated.

109
src/3rdparty/libpng/README vendored
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@ -1,15 +1,16 @@
README for libpng version 1.6.35 - July 15, 2018 (shared library 16.0)
See the note about version numbers near the top of png.h
README for libpng version 1.6.36 - December 1, 2018
===================================================
See the note about version numbers near the top of png.h.
See INSTALL for instructions on how to install libpng.
Libpng comes in several distribution formats. Get libpng-*.tar.gz or
libpng-*.tar.xz or if you want UNIX-style line endings in the text files,
or lpng*.7z or lpng*.zip if you want DOS-style line endings.
libpng-*.tar.xz or if you want UNIX-style line endings in the text
files, or lpng*.7z or lpng*.zip if you want DOS-style line endings.
Version 0.89 was the first official release of libpng. Don't let the
fact that it's the first release fool you. The libpng library has been in
extensive use and testing since mid-1995. By late 1997 it had
fact that it's the first release fool you. The libpng library has been
in extensive use and testing since mid-1995. By late 1997 it had
finally gotten to the stage where there hadn't been significant
changes to the API in some time, and people have a bad feeling about
libraries with versions < 1.0. Version 1.0.0 was released in
@ -60,59 +61,37 @@ the library action on the detection of chunk CRC errors. It is possible
to set different actions based on whether the CRC error occurred in a
critical or an ancillary chunk.
The changes made to the library, and bugs fixed are based on discussions
on the PNG-implement mailing list and not on material submitted
privately to Guy, Andreas, or Glenn. They will forward any good
suggestions to the list.
For a detailed description on using libpng, read libpng-manual.txt. For
examples of libpng in a program, see example.c and pngtest.c. For usage
information and restrictions (what little they are) on libpng, see
png.h. For a description on using zlib (the compression library used by
libpng) and zlib's restrictions, see zlib.h
For a detailed description on using libpng, read libpng-manual.txt.
For examples of libpng in a program, see example.c and pngtest.c. For
usage information and restrictions (what little they are) on libpng,
see png.h. For a description on using zlib (the compression library
used by libpng) and zlib's restrictions, see zlib.h
I have included a general makefile, as well as several machine and
compiler specific ones, but you may have to modify one for your own needs.
compiler specific ones, but you may have to modify one for your own
needs.
You should use zlib 1.0.4 or later to run this, but it MAY work with
versions as old as zlib 0.95. Even so, there are bugs in older zlib
versions which can cause the output of invalid compression streams for
some images. You will definitely need zlib 1.0.4 or later if you are
taking advantage of the MS-DOS "far" structure allocation for the small
and medium memory models. You should also note that zlib is a
compression library that is useful for more things than just PNG files.
You can use zlib as a drop-in replacement for fread() and fwrite() if
you are so inclined.
some images.
zlib should be available at the same place that libpng is, or at zlib.net.
You should also note that zlib is a compression library that is useful
for more things than just PNG files. You can use zlib as a drop-in
replacement for fread() and fwrite(), if you are so inclined.
zlib should be available at the same place that libpng is, or at
https://zlib.net.
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
these at http://www.libpng.org/pub/png/pngdocs.html .
This code is currently being archived at libpng.sourceforge.io in the
[DOWNLOAD] area, and at http://libpng.download/src . If you
can't find it in any of those places, e-mail me, and I'll help you find it.
[DOWNLOAD] area, and at http://libpng.download/src .
I am not a lawyer, but I believe that the Export Control Classification
Number (ECCN) for libpng is EAR99, which means not subject to export
controls or International Traffic in Arms Regulations (ITAR) because it
is open source, publicly available software, that does not contain any
encryption software. See the EAR, paragraphs 734.3(b)(3) and 734.7(b).
If you have any code changes, requests, problems, etc., please e-mail
them to me. Also, I'd appreciate any make files or project files,
and any modifications you needed to make to get libpng to compile,
along with a #define variable to tell what compiler/system you are on.
If you needed to add transformations to libpng, or wish libpng would
provide the image in a different way, drop me a note (and code, if
possible), so I can consider supporting the transformation.
Finally, if you get any warning messages when compiling libpng
(note: not zlib), and they are easy to fix, I'd appreciate the
fix. Please mention "libpng" somewhere in the subject line. Thanks.
This release was created and will be supported by myself (of course
based in a large way on Guy's and Andreas' earlier work), and the PNG
This release, based in a large way on Glenn's, Guy's and Andreas'
earlier work, was created and will be supported by myself and the PNG
development group.
Send comments/corrections/commendations to png-mng-implement at
@ -120,34 +99,21 @@ lists.sourceforge.net (subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe).
You can't reach Guy, the original libpng author, at the addresses
given in previous versions of this document. He and Andreas will
read mail addressed to the png-implement list, however.
Please do not send general questions about PNG. Send them to
png-mng-misc at lists.sf.net (subscription required; visit
Send general questions about the PNG specification to png-mng-misc
at lists.sourceforge.net (subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-misc to
subscribe). If you have a question about something
in the PNG specification that is related to using libpng, send it
to me. Send me any questions that start with "I was using libpng,
and ...". If in doubt, send questions to me. I'll bounce them
to others, if necessary.
Please do not send suggestions on how to change PNG. We have
been discussing PNG for twenty years now, and it is official and
finished. If you have suggestions for libpng, however, I'll
gladly listen. Even if your suggestion is not used immediately,
it may be used later.
subscribe).
Files in this distribution:
ANNOUNCE => Announcement of this version, with recent changes
AUTHORS => List of contributing authors
CHANGES => Description of changes between libpng versions
KNOWNBUG => List of known bugs and deficiencies
LICENSE => License to use and redistribute libpng
README => This file
TODO => Things not implemented in the current library
Y2KINFO => Statement of Y2K compliance
TRADEMARK => Trademark information
example.c => Example code for using libpng functions
libpng.3 => manual page for libpng (includes libpng-manual.txt)
libpng-manual.txt => Description of libpng and its functions
@ -208,15 +174,10 @@ Files in this distribution:
scripts => Directory containing scripts for building libpng:
(see scripts/README.txt for the list of scripts)
Good luck, and happy coding.
Good luck, and happy coding!
-Glenn Randers-Pehrson (current maintainer, since 1998)
Internet: glennrp at users.sourceforge.net
-Andreas Eric Dilger (former maintainer, 1996-1997)
Internet: adilger at enel.ucalgary.ca
Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
-Guy Eric Schalnat (original author and former maintainer, 1995-1996)
(formerly of Group 42, Inc)
Internet: gschal at infinet.com
* Cosmin Truta (current maintainer, since 2018)
* Glenn Randers-Pehrson (former maintainer, 1998-2018)
* Andreas Eric Dilger (former maintainer, 1996-1997)
* Guy Eric Schalnat (original author and former maintainer, 1995-1996)
(formerly of Group 42, Inc.)

91
src/3rdparty/libpng/libpng-manual.txt vendored
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@ -1,7 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.35 - July 15, 2018
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 2018 Cosmin Truta
Copyright (c) 1998-2018 Glenn Randers-Pehrson
This document is released under the libpng license.
@ -10,9 +9,13 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng version 1.6.36 - December 1, 2018
Updated and distributed by Cosmin Truta
Copyright (c) 2018 Cosmin Truta
libpng versions 0.97, January 1998, through 1.6.35 - July 15, 2018
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson
Copyright (c) 1998-2018 Glenn Randers-Pehrson
libpng 1.0 beta 6 - version 0.96 - May 28, 1997
Updated and distributed by Andreas Dilger
@ -44,7 +47,6 @@ libpng-manual.txt - A description on how to use and modify libpng
XIII. Detecting libpng
XIV. Source code repository
XV. Coding style
XVI. Y2K Compliance in libpng
I. Introduction
@ -65,7 +67,7 @@ file format in application programs.
The PNG specification (second edition), November 2003, is available as
a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at
<https://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 PNG-1.2 specification is available at
@ -73,9 +75,9 @@ The PNG-1.2 specification is available at
It is technically equivalent
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 at
<https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a
W3C Recommendation <https://www.w3.org/TR/REC-png-961001>.
W3C Recommendation at <https://www.w3.org/TR/REC-png-961001>.
Some additional chunks are described in the special-purpose public chunks
documents at <http://www.libpng.org/pub/png/spec/register/>
@ -4054,7 +4056,7 @@ Flags containing additional information about the image are held in
the 'flags' field of png_image.
PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB == 0x01
This indicates the the RGB values of the in-memory bitmap do not
This indicates that the RGB values of the in-memory bitmap do not
correspond to the red, green and blue end-points defined by sRGB.
PNG_IMAGE_FLAG_FAST == 0x02
@ -4520,7 +4522,7 @@ When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
having level = 0 will be printed. There aren't any such statements in
this version of libpng, but if you insert some they will be printed.
VII. MNG support
VII. MNG support
The MNG specification (available at http://www.libpng.org/pub/mng) allows
certain extensions to PNG for PNG images that are embedded in MNG datastreams.
@ -4547,7 +4549,7 @@ or any other MNG chunks; your application must provide its own support for
them. You may wish to consider using libmng (available at
https://www.libmng.com/) instead.
VIII. Changes to Libpng from version 0.88
VIII. Changes to Libpng from version 0.88
It should be noted that versions of libpng later than 0.96 are not
distributed by the original libpng author, Guy Schalnat, nor by
@ -4602,7 +4604,7 @@ application:
png_uint_32 application_vn = PNG_LIBPNG_VER;
IX. Changes to Libpng from version 1.0.x to 1.2.x
IX. Changes to Libpng from version 1.0.x to 1.2.x
Support for user memory management was enabled by default. To
accomplish this, the functions png_create_read_struct_2(),
@ -4699,7 +4701,7 @@ which also expands tRNS to alpha was replaced with
png_set_expand_gray_1_2_4_to_8()
which does not. It has been deprecated since libpng-1.0.18 and 1.2.9.
X. Changes to Libpng from version 1.0.x/1.2.x to 1.4.x
X. Changes to Libpng from version 1.0.x/1.2.x to 1.4.x
Private libpng prototypes and macro definitions were moved from
png.h and pngconf.h into a new pngpriv.h header file.
@ -4809,7 +4811,7 @@ was renamed to PNG_READ_QUANTIZE_SUPPORTED.
We removed the trailing '.' from the warning and error messages.
XI. Changes to Libpng from version 1.4.x to 1.5.x
XI. Changes to Libpng from version 1.4.x to 1.5.x
From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
function) incorrectly returned a value of type png_uint_32.
@ -4872,7 +4874,7 @@ to png_bytepp, and in png_set_iCCP, from png_charp to png_const_bytep.
There are changes of form in png.h, including new and changed macros to
declare parts of the API. Some API functions with arguments that are
pointers to data not modified within the function have been corrected to
declare these arguments with PNG_CONST.
declare these arguments with const.
Much of the internal use of C macros to control the library build has also
changed and some of this is visible in the exported header files, in
@ -5067,7 +5069,7 @@ even though the default is to use the macros - this allows applications
to choose at app buildtime whether or not to use macros (previously
impossible because the functions weren't in the default build.)
XII. Changes to Libpng from version 1.5.x to 1.6.x
XII. Changes to Libpng from version 1.5.x to 1.6.x
A "simplified API" has been added (see documentation in png.h and a simple
example in contrib/examples/pngtopng.c). The new publicly visible API
@ -5230,7 +5232,7 @@ attempt to decode the Exif profile; it simply returns a byte array
containing the profile to the calling application which must do its own
decoding.
XIII. Detecting libpng
XIII. Detecting libpng
The png_get_io_ptr() function has been present since libpng-0.88, has never
changed, and is unaffected by conditional compilation macros. It is the
@ -5255,7 +5257,7 @@ or you can browse it with a web browser at
https://sourceforge.net/p/libpng/code/ci/libpng16/tree/
Patches can be sent to png-mng-implement at lists.sourceforge.net or
you can upload them to the libpng bug tracker at
uploaded to the libpng bug tracker at
https://libpng.sourceforge.io/
@ -5405,58 +5407,3 @@ We do not use the TAB character for indentation in the C sources.
Lines do not exceed 80 characters.
Other rules can be inferred by inspecting the libpng source.
XVI. Y2K Compliance in libpng
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
upward through 1.6.35 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has two year fields. One is a 2-byte unsigned integer
that will hold years up to 65535. The other, which is deprecated,
holds the date in text format, and will hold years up to 9999.
The integer is
"png_uint_16 year" in png_time_struct.
The string is
"char time_buffer[29]" in png_struct. This is no longer used
in libpng-1.6.x and will be removed from libpng-1.7.0.
There are seven time-related functions:
png_convert_to_rfc_1123_buffer() in png.c
(formerly png_convert_to_rfc_1152() in error, and
also formerly png_convert_to_rfc_1123())
png_convert_from_struct_tm() in pngwrite.c, called
in pngwrite.c
png_convert_from_time_t() in pngwrite.c
png_get_tIME() in pngget.c
png_handle_tIME() in pngrutil.c, called in pngread.c
png_set_tIME() in pngset.c
png_write_tIME() in pngwutil.c, called in pngwrite.c
All appear to handle dates properly in a Y2K environment. The
png_convert_from_time_t() function calls gmtime() to convert from system
clock time, which returns (year - 1900), which we properly convert to
the full 4-digit year. There is a possibility that applications using
libpng are not passing 4-digit years into the png_convert_to_rfc_1123()
function, or that they are incorrectly passing only a 2-digit year
instead of "year - 1900" into the png_convert_from_struct_tm() function,
but this is not under our control. The libpng documentation has always
stated that it works with 4-digit years, and the APIs have been
documented as such.
The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned
integer to hold the year, and can hold years as large as 65535.
zlib, upon which libpng depends, is also Y2K compliant. It contains
no date-related code.
Glenn Randers-Pehrson
libpng maintainer
PNG Development Group

50
src/3rdparty/libpng/png.c vendored
View File

@ -1,10 +1,10 @@
/* png.c - location for general purpose libpng functions
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -14,7 +14,7 @@
#include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */
typedef png_libpng_version_1_6_35 Your_png_h_is_not_version_1_6_35;
typedef png_libpng_version_1_6_36 Your_png_h_is_not_version_1_6_36;
#ifdef __GNUC__
/* The version tests may need to be added to, but the problem warning has
@ -736,7 +736,7 @@ png_save_int_32(png_bytep buf, png_int_32 i)
int PNGAPI
png_convert_to_rfc1123_buffer(char out[29], png_const_timep ptime)
{
static PNG_CONST char short_months[12][4] =
static const char short_months[12][4] =
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
@ -814,20 +814,14 @@ png_get_copyright(png_const_structrp png_ptr)
#ifdef PNG_STRING_COPYRIGHT
return PNG_STRING_COPYRIGHT
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
"libpng version 1.6.35 - July 15, 2018" PNG_STRING_NEWLINE \
"libpng version 1.6.36" PNG_STRING_NEWLINE \
"Copyright (c) 2018 Cosmin Truta" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson" \
PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
return "libpng version 1.6.35 - July 15, 2018\
Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
# endif
#endif
}
@ -1121,7 +1115,7 @@ png_colorspace_set_gamma(png_const_structrp png_ptr,
png_colorspacerp colorspace, png_fixed_point gAMA)
{
/* Changed in libpng-1.5.4 to limit the values to ensure overflow can't
* occur. Since the fixed point representation is asymetrical it is
* occur. Since the fixed point representation is asymmetrical it is
* possible for 1/gamma to overflow the limit of 21474 and this means the
* gamma value must be at least 5/100000 and hence at most 20000.0. For
* safety the limits here are a little narrower. The values are 0.00016 to
@ -3134,11 +3128,11 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, size_t size,
/* The total output count (max) is now 4+precision */
/* Check for an exponent, if we don't need one we are
* done and just need to terminate the string. At
* this point exp_b10==(-1) is effectively a flag - it got
* to '-1' because of the decrement after outputting
* the decimal point above (the exponent required is
* *not* -1!)
* done and just need to terminate the string. At this
* point, exp_b10==(-1) is effectively a flag: it got
* to '-1' because of the decrement, after outputting
* the decimal point above. (The exponent required is
* *not* -1.)
*/
if (exp_b10 >= (-1) && exp_b10 <= 2)
{
@ -3976,18 +3970,18 @@ png_gamma_correct(png_structrp png_ptr, unsigned int value,
*/
static void
png_build_16bit_table(png_structrp png_ptr, png_uint_16pp *ptable,
PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
unsigned int shift, png_fixed_point gamma_val)
{
/* Various values derived from 'shift': */
PNG_CONST unsigned int num = 1U << (8U - shift);
unsigned int num = 1U << (8U - shift);
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
/* CSE the division and work round wacky GCC warnings (see the comments
* in png_gamma_8bit_correct for where these come from.)
*/
PNG_CONST double fmax = 1./(((png_int_32)1 << (16U - shift))-1);
double fmax = 1.0 / (((png_int_32)1 << (16U - shift)) - 1);
#endif
PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
PNG_CONST unsigned int max_by_2 = 1U << (15U-shift);
unsigned int max = (1U << (16U - shift)) - 1U;
unsigned int max_by_2 = 1U << (15U - shift);
unsigned int i;
png_uint_16pp table = *ptable =
@ -4053,10 +4047,10 @@ png_build_16bit_table(png_structrp png_ptr, png_uint_16pp *ptable,
*/
static void
png_build_16to8_table(png_structrp png_ptr, png_uint_16pp *ptable,
PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
unsigned int shift, png_fixed_point gamma_val)
{
PNG_CONST unsigned int num = 1U << (8U - shift);
PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
unsigned int num = 1U << (8U - shift);
unsigned int max = (1U << (16U - shift))-1U;
unsigned int i;
png_uint_32 last;
@ -4121,7 +4115,7 @@ png_build_16to8_table(png_structrp png_ptr, png_uint_16pp *ptable,
*/
static void
png_build_8bit_table(png_structrp png_ptr, png_bytepp ptable,
PNG_CONST png_fixed_point gamma_val)
png_fixed_point gamma_val)
{
unsigned int i;
png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256);

299
src/3rdparty/libpng/png.h vendored
View File

@ -1,29 +1,65 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.6.35, July 15, 2018
* libpng version 1.6.36 - December 1, 2018
*
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license (See LICENSE, below)
* This code is released under the libpng license. (See LICENSE, below.)
*
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.6.35, July 15, 2018:
* libpng versions 0.97, January 1998, through 1.6.35, July 2018:
* Glenn Randers-Pehrson.
* libpng version 1.6.36, December 1, 2018: Cosmin Truta
* See also "Contributing Authors", below.
*/
/*
* COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
* COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
* =========================================
*
* If you modify libpng you may insert additional notices immediately following
* this sentence.
* PNG Reference Library License version 2
* ---------------------------------------
*
* This code is released under the libpng license.
* * Copyright (c) 1995-2018 The PNG Reference Library Authors.
* * Copyright (c) 2018 Cosmin Truta.
* * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson.
* * Copyright (c) 1996-1997 Andreas Dilger.
* * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* The software is supplied "as is", without warranty of any kind,
* express or implied, including, without limitation, the warranties
* of merchantability, fitness for a particular purpose, title, and
* non-infringement. In no even shall the Copyright owners, or
* anyone distributing the software, be liable for any damages or
* other liability, whether in contract, tort or otherwise, arising
* from, out of, or in connection with the software, or the use or
* other dealings in the software, even if advised of the possibility
* of such damage.
*
* Permission is hereby granted to use, copy, modify, and distribute
* this software, or portions hereof, for any purpose, without fee,
* subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you
* must not claim that you wrote the original software. If you
* use this software in a product, an acknowledgment in the product
* documentation would be appreciated, but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must
* not be misrepresented as being the original software.
*
* 3. This Copyright notice may not be removed or altered from any
* source or altered source distribution.
*
*
* PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35)
* -----------------------------------------------------------------------
*
* libpng versions 1.0.7, July 1, 2000 through 1.6.35, July 15, 2018 are
* Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are
@ -31,38 +67,38 @@
* disclaimer and license as libpng-1.0.6 with the following individuals
* added to the list of Contributing Authors:
*
* Simon-Pierre Cadieux
* Eric S. Raymond
* Mans Rullgard
* Cosmin Truta
* Gilles Vollant
* James Yu
* Mandar Sahastrabuddhe
* Google Inc.
* Vadim Barkov
* Simon-Pierre Cadieux
* Eric S. Raymond
* Mans Rullgard
* Cosmin Truta
* Gilles Vollant
* James Yu
* Mandar Sahastrabuddhe
* Google Inc.
* Vadim Barkov
*
* and with the following additions to the disclaimer:
*
* There is no warranty against interference with your enjoyment of the
* library or against infringement. There is no warranty that our
* efforts or the library will fulfill any of your particular purposes
* or needs. This library is provided with all faults, and the entire
* risk of satisfactory quality, performance, accuracy, and effort is with
* the user.
* There is no warranty against interference with your enjoyment of
* the library or against infringement. There is no warranty that our
* efforts or the library will fulfill any of your particular purposes
* or needs. This library is provided with all faults, and the entire
* risk of satisfactory quality, performance, accuracy, and effort is
* with the user.
*
* Some files in the "contrib" directory and some configure-generated
* files that are distributed with libpng have other copyright owners and
* files that are distributed with libpng have other copyright owners, and
* are released under other open source licenses.
*
* libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
* Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
* libpng-0.96, and are distributed according to the same disclaimer and
* license as libpng-0.96, with the following individuals added to the list
* of Contributing Authors:
* license as libpng-0.96, with the following individuals added to the
* list of Contributing Authors:
*
* Tom Lane
* Glenn Randers-Pehrson
* Willem van Schaik
* Tom Lane
* Glenn Randers-Pehrson
* Willem van Schaik
*
* libpng versions 0.89, June 1996, through 0.96, May 1997, are
* Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
@ -70,14 +106,14 @@
* libpng-0.88, with the following individuals added to the list of
* Contributing Authors:
*
* John Bowler
* Kevin Bracey
* Sam Bushell
* Magnus Holmgren
* Greg Roelofs
* Tom Tanner
* John Bowler
* Kevin Bracey
* Sam Bushell
* Magnus Holmgren
* Greg Roelofs
* Tom Tanner
*
* Some files in the "scripts" directory have other copyright owners
* Some files in the "scripts" directory have other copyright owners,
* but are released under this license.
*
* libpng versions 0.5, May 1995, through 0.88, January 1996, are
@ -86,62 +122,49 @@
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
*
* Andreas Dilger
* Dave Martindale
* Guy Eric Schalnat
* Paul Schmidt
* Tim Wegner
* Andreas Dilger
* Dave Martindale
* Guy Eric Schalnat
* Paul Schmidt
* Tim Wegner
*
* The PNG Reference Library is supplied "AS IS". The Contributing Authors
* and Group 42, Inc. disclaim all warranties, expressed or implied,
* including, without limitation, the warranties of merchantability and of
* fitness for any purpose. The Contributing Authors and Group 42, Inc.
* assume no liability for direct, indirect, incidental, special, exemplary,
* or consequential damages, which may result from the use of the PNG
* Reference Library, even if advised of the possibility of such damage.
* The PNG Reference Library is supplied "AS IS". The Contributing
* Authors and Group 42, Inc. disclaim all warranties, expressed or
* implied, including, without limitation, the warranties of
* merchantability and of fitness for any purpose. The Contributing
* Authors and Group 42, Inc. assume no liability for direct, indirect,
* incidental, special, exemplary, or consequential damages, which may
* result from the use of the PNG Reference Library, even if advised of
* the possibility of such damage.
*
* Permission is hereby granted to use, copy, modify, and distribute this
* source code, or portions hereof, for any purpose, without fee, subject
* to the following restrictions:
*
* 1. The origin of this source code must not be misrepresented.
* 1. The origin of this source code must not be misrepresented.
*
* 2. Altered versions must be plainly marked as such and must not
* be misrepresented as being the original source.
* 2. Altered versions must be plainly marked as such and must not
* be misrepresented as being the original source.
*
* 3. This Copyright notice may not be removed or altered from any
* source or altered source distribution.
* 3. This Copyright notice may not be removed or altered from any
* source or altered source distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* supporting the PNG file format in commercial products. If you use this
* source code in a product, acknowledgment is not required but would be
* appreciated.
* The Contributing Authors and Group 42, Inc. specifically permit,
* without fee, and encourage the use of this source code as a component
* to supporting the PNG file format in commercial products. If you use
* this source code in a product, acknowledgment is not required but would
* be appreciated.
*
* END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
*
* TRADEMARK:
* TRADEMARK
* =========
*
* The name "libpng" has not been registered by the Copyright owner
* The name "libpng" has not been registered by the Copyright owners
* as a trademark in any jurisdiction. However, because libpng has
* been distributed and maintained world-wide, continually since 1995,
* the Copyright owner claims "common-law trademark protection" in any
* the Copyright owners claim "common-law trademark protection" in any
* jurisdiction where common-law trademark is recognized.
*
* OSI CERTIFICATION:
*
* Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
* a certification mark of the Open Source Initiative. OSI has not addressed
* the additional disclaimers inserted at version 1.0.7.
*
* EXPORT CONTROL:
*
* The Copyright owner believes that the Export Control Classification
* Number (ECCN) for libpng is EAR99, which means not subject to export
* controls or International Traffic in Arms Regulations (ITAR) because
* it is open source, publicly available software, that does not contain
* any encryption software. See the EAR, paragraphs 734.3(b)(3) and
* 734.7(b).
*/
/*
@ -207,23 +230,25 @@
* 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
* 1.0.7 1 10007 (still compatible)
* ...
* 1.0.19 10 10019 10.so.0.19[.0]
* 1.0.69 10 10069 10.so.0.69[.0]
* ...
* 1.2.59 13 10257 12.so.0.59[.0]
* 1.2.59 13 10259 12.so.0.59[.0]
* ...
* 1.5.30 15 10527 15.so.15.30[.0]
* 1.4.20 14 10420 14.so.0.20[.0]
* ...
* 1.6.35 16 10635 16.so.16.35[.0]
* 1.5.30 15 10530 15.so.15.30[.0]
* ...
* 1.6.36 16 10636 16.so.16.36[.0]
*
* Henceforth the source version will match the shared-library major
* and minor numbers; the shared-library major version number will be
* used for changes in backward compatibility, as it is intended. The
* PNG_LIBPNG_VER macro, which is not used within libpng but is available
* for applications, is an unsigned integer of the form xyyzz corresponding
* to the source version x.y.z (leading zeros in y and z). Beta versions
* were given the previous public release number plus a letter, until
* version 1.0.6j; from then on they were given the upcoming public
* release number plus "betaNN" or "rcNN".
* Henceforth the source version will match the shared-library major and
* minor numbers; the shared-library major version number will be used for
* changes in backward compatibility, as it is intended.
* The PNG_LIBPNG_VER macro, which is not used within libpng but is
* available for applications, is an unsigned integer of the form XYYZZ
* corresponding to the source version X.Y.Z (leading zeros in Y and Z).
* Beta versions were given the previous public release number plus a
* letter, until version 1.0.6j; from then on they were given the upcoming
* public release number plus "betaNN" or "rcNN".
*
* Binary incompatibility exists only when applications make direct access
* to the info_ptr or png_ptr members through png.h, and the compiled
@ -233,65 +258,8 @@
* in binary compatibility (e.g., when a new feature is added).
*
* See libpng.txt or libpng.3 for more information. The PNG specification
* is available as a W3C Recommendation and as an ISO Specification,
* <https://www.w3.org/TR/2003/REC-PNG-20031110/
*/
/*
* Y2K compliance in libpng:
* =========================
*
* July 15, 2018
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
* upward through 1.6.35 are Y2K compliant. It is my belief that
* earlier versions were also Y2K compliant.
*
* Libpng only has two year fields. One is a 2-byte unsigned integer
* that will hold years up to 65535. The other, which is deprecated,
* holds the date in text format, and will hold years up to 9999.
*
* The integer is
* "png_uint_16 year" in png_time_struct.
*
* The string is
* "char time_buffer[29]" in png_struct. This is no longer used
* in libpng-1.6.x and will be removed from libpng-1.7.0.
*
* There are seven time-related functions:
* png.c: png_convert_to_rfc_1123_buffer() in png.c
* (formerly png_convert_to_rfc_1123() prior to libpng-1.5.x and
* png_convert_to_rfc_1152() in error prior to libpng-0.98)
* png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c
* png_convert_from_time_t() in pngwrite.c
* png_get_tIME() in pngget.c
* png_handle_tIME() in pngrutil.c, called in pngread.c
* png_set_tIME() in pngset.c
* png_write_tIME() in pngwutil.c, called in pngwrite.c
*
* All handle dates properly in a Y2K environment. The
* png_convert_from_time_t() function calls gmtime() to convert from system
* clock time, which returns (year - 1900), which we properly convert to
* the full 4-digit year. There is a possibility that libpng applications
* are not passing 4-digit years into the png_convert_to_rfc_1123_buffer()
* function, or that they are incorrectly passing only a 2-digit year
* instead of "year - 1900" into the png_convert_from_struct_tm() function,
* but this is not under our control. The libpng documentation has always
* stated that it works with 4-digit years, and the APIs have been
* documented as such.
*
* The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned
* integer to hold the year, and can hold years as large as 65535.
*
* zlib, upon which libpng depends, is also Y2K compliant. It contains
* no date-related code.
*
* Glenn Randers-Pehrson
* libpng maintainer
* PNG Development Group
* is available as a W3C Recommendation and as an ISO/IEC Standard; see
* <https://www.w3.org/TR/2003/REC-PNG-20031110/>
*/
#ifndef PNG_H
@ -309,8 +277,8 @@
*/
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.6.35"
#define PNG_HEADER_VERSION_STRING " libpng version 1.6.35 - July 15, 2018\n"
#define PNG_LIBPNG_VER_STRING "1.6.36"
#define PNG_HEADER_VERSION_STRING " libpng version 1.6.36 - December 1, 2018\n"
#define PNG_LIBPNG_VER_SONUM 16
#define PNG_LIBPNG_VER_DLLNUM 16
@ -318,13 +286,13 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 6
#define PNG_LIBPNG_VER_RELEASE 35
#define PNG_LIBPNG_VER_RELEASE 36
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
*/
#define PNG_LIBPNG_VER_BUILD 02
#define PNG_LIBPNG_VER_BUILD 0
/* Release Status */
#define PNG_LIBPNG_BUILD_ALPHA 1
@ -341,15 +309,16 @@
#define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
PNG_LIBPNG_BUILD_PRIVATE */
#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
* We must not include leading zeros.
* Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
/* Careful here. At one time, Guy wanted to use 082, but that
* would be octal. We must not include leading zeros.
* Versions 0.7 through 1.0.0 were in the range 0 to 100 here
* (only version 1.0.0 was mis-numbered 100 instead of 10000).
* From version 1.0.1 it is:
* XXYYZZ, where XX=major, YY=minor, ZZ=release
*/
#define PNG_LIBPNG_VER 10635 /* 1.6.35 */
#define PNG_LIBPNG_VER 10636 /* 1.6.36 */
/* Library configuration: these options cannot be changed after
* the library has been built.
@ -459,7 +428,7 @@ extern "C" {
/* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number.
*/
typedef char* png_libpng_version_1_6_35;
typedef char* png_libpng_version_1_6_36;
/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info.
*
@ -2013,12 +1982,12 @@ PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr,
PNG_EXPORT(246, png_uint_32, png_get_eXIf, (png_const_structrp png_ptr,
png_inforp info_ptr, png_bytep *exif));
PNG_EXPORT(247, void, png_set_eXIf, (png_const_structrp png_ptr,
png_inforp info_ptr, const png_bytep exif));
png_inforp info_ptr, png_bytep exif));
PNG_EXPORT(248, png_uint_32, png_get_eXIf_1, (png_const_structrp png_ptr,
png_const_inforp info_ptr, png_uint_32 *num_exif, png_bytep *exif));
PNG_EXPORT(249, void, png_set_eXIf_1, (png_const_structrp png_ptr,
png_inforp info_ptr, const png_uint_32 num_exif, const png_bytep exif));
png_inforp info_ptr, png_uint_32 num_exif, png_bytep exif));
#endif
#ifdef PNG_gAMA_SUPPORTED
@ -2764,7 +2733,7 @@ typedef struct
*
* When the simplified API needs to convert between sRGB and linear colorspaces,
* the actual sRGB transfer curve defined in the sRGB specification (see the
* article at https://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.
*
* When an alpha channel is present it is expected to denote pixel coverage
@ -2967,7 +2936,7 @@ typedef struct
* 'flags' field of png_image.
*/
#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01
/* This indicates the the RGB values of the in-memory bitmap do not
/* This indicates that the RGB values of the in-memory bitmap do not
* correspond to the red, green and blue end-points defined by sRGB.
*/

16
src/3rdparty/libpng/pngconf.h vendored
View File

@ -1,11 +1,12 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.6.35, July 15, 2018
* libpng version 1.6.36
*
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2016,2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -57,14 +58,13 @@
#endif /* PNG_BUILDING_SYMBOL_TABLE */
/* Prior to 1.6.0 it was possible to turn off 'const' in declarations using
* PNG_NO_CONST; this is no longer supported except for data declarations which
* apparently still cause problems in 2011 on some compilers.
/* Prior to 1.6.0, it was possible to turn off 'const' in declarations,
* using PNG_NO_CONST. This is no longer supported.
*/
#define PNG_CONST const /* backward compatibility only */
/* This controls optimization of the reading of 16-bit and 32-bit values
* from PNG files. It can be set on a per-app-file basis - it
/* This controls optimization of the reading of 16-bit and 32-bit
* values from PNG files. It can be set on a per-app-file basis: it
* just changes whether a macro is used when the function is called.
* The library builder sets the default; if read functions are not
* built into the library the macro implementation is forced on.

6
src/3rdparty/libpng/pngdebug.h vendored
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@ -1,10 +1,10 @@
/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
*
* Last changed in libpng 1.6.8 [December 19, 2013]
* Copyright (c) 2018 Cosmin Truta
* 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer

12
src/3rdparty/libpng/pngerror.c vendored
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@ -1,10 +1,10 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -425,7 +425,7 @@ png_app_error(png_const_structrp png_ptr, png_const_charp error_message)
* if the character is invalid.
*/
#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
static PNG_CONST char png_digit[16] = {
static const char png_digit[16] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'
};
@ -885,7 +885,7 @@ PNG_FUNCTION(void /* PRIVATE */, (PNGCBAPI
png_safe_error),(png_structp png_nonconst_ptr, png_const_charp error_message),
PNG_NORETURN)
{
const png_const_structrp png_ptr = png_nonconst_ptr;
png_const_structrp png_ptr = png_nonconst_ptr;
png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr);
/* An error is always logged here, overwriting anything (typically a warning)
@ -920,7 +920,7 @@ png_safe_error),(png_structp png_nonconst_ptr, png_const_charp error_message),
void /* PRIVATE */ PNGCBAPI
png_safe_warning(png_structp png_nonconst_ptr, png_const_charp warning_message)
{
const png_const_structrp png_ptr = png_nonconst_ptr;
png_const_structrp png_ptr = png_nonconst_ptr;
png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr);
/* A warning is only logged if there is no prior warning or error. */

6
src/3rdparty/libpng/pngget.c vendored
View File

@ -1,10 +1,10 @@
/* pngget.c - retrieval of values from info struct
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer

6
src/3rdparty/libpng/pnginfo.h vendored
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@ -1,10 +1,10 @@
/* pnginfo.h - header file for PNG reference library
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2013,2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer

11
src/3rdparty/libpng/pnglibconf.h vendored
View File

@ -1,10 +1,9 @@
/* libpng 1.6.35 STANDARD API DEFINITION */
/* pnglibconf.h - library build configuration */
/* Libpng version 1.6.35 - July 15, 2018 */
/* libpng version 1.6.36 */
/* Copyright (c) 1998-2018 Glenn Randers-Pehrson */
/* Copyright (c) 2018 Cosmin Truta */
/* Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson */
/* This code is released under the libpng license. */
/* For conditions of distribution and use, see the disclaimer */
@ -20,8 +19,6 @@
#define PNG_ALIGNED_MEMORY_SUPPORTED
/*#undef PNG_ARM_NEON_API_SUPPORTED*/
/*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/
/*#undef PNG_POWERPC_VSX_API_SUPPORTED*/
/*#undef PNG_POWERPC_VSX_CHECK_SUPPORTED*/
#define PNG_BENIGN_ERRORS_SUPPORTED
#define PNG_BENIGN_READ_ERRORS_SUPPORTED
/*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/
@ -46,6 +43,8 @@
#define PNG_IO_STATE_SUPPORTED
#define PNG_MNG_FEATURES_SUPPORTED
#define PNG_POINTER_INDEXING_SUPPORTED
/*#undef PNG_POWERPC_VSX_API_SUPPORTED*/
/*#undef PNG_POWERPC_VSX_CHECK_SUPPORTED*/
#define PNG_PROGRESSIVE_READ_SUPPORTED
#define PNG_READ_16BIT_SUPPORTED
#define PNG_READ_ALPHA_MODE_SUPPORTED

6
src/3rdparty/libpng/pngmem.c vendored
View File

@ -1,10 +1,10 @@
/* pngmem.c - stub functions for memory allocation
*
* Last changed in libpng 1.6.26 [October 20, 2016]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2014,2016 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer

16
src/3rdparty/libpng/pngpread.c vendored
View File

@ -1,10 +1,10 @@
/* pngpread.c - read a png file in push mode
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -972,20 +972,20 @@ png_read_push_finish_row(png_structrp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static PNG_CONST png_byte png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
static const png_byte png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static PNG_CONST png_byte png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
static const png_byte png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static PNG_CONST png_byte png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
static const png_byte png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static PNG_CONST png_byte png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
static const png_byte png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
/* Height of interlace block. This is not currently used - if you need
* it, uncomment it here and in png.h
static PNG_CONST png_byte png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
static const png_byte png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
*/
#endif

38
src/3rdparty/libpng/pngpriv.h vendored
View File

@ -1,10 +1,10 @@
/* pngpriv.h - private declarations for use inside libpng
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -180,7 +180,10 @@
# else /* !defined __ARM_NEON__ */
/* The 'intrinsics' code simply won't compile without this -mfpu=neon:
*/
# define PNG_ARM_NEON_IMPLEMENTATION 2
# if !defined(__aarch64__)
/* The assembler code currently does not work on ARM64 */
# define PNG_ARM_NEON_IMPLEMENTATION 2
# endif /* __aarch64__ */
# endif /* __ARM_NEON__ */
# endif /* !PNG_ARM_NEON_IMPLEMENTATION */
@ -1548,10 +1551,10 @@ PNG_INTERNAL_FUNCTION(void,png_handle_zTXt,(png_structrp png_ptr,
#endif
PNG_INTERNAL_FUNCTION(void,png_check_chunk_name,(png_const_structrp png_ptr,
const png_uint_32 chunk_name),PNG_EMPTY);
png_uint_32 chunk_name),PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_check_chunk_length,(png_const_structrp png_ptr,
const png_uint_32 chunk_length),PNG_EMPTY);
png_uint_32 chunk_length),PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_handle_unknown,(png_structrp png_ptr,
png_inforp info_ptr, png_uint_32 length, int keep),PNG_EMPTY);
@ -2128,6 +2131,29 @@ PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_sse2,
PNG_INTERNAL_FUNCTION(png_uint_32, png_check_keyword, (png_structrp png_ptr,
png_const_charp key, png_bytep new_key), PNG_EMPTY);
#if PNG_ARM_NEON_IMPLEMENTATION == 1
PNG_INTERNAL_FUNCTION(void,
png_riffle_palette_rgba,
(png_structrp, png_row_infop),
PNG_EMPTY);
PNG_INTERNAL_FUNCTION(int,
png_do_expand_palette_neon_rgba,
(png_structrp,
png_row_infop,
png_const_bytep,
const png_bytepp,
const png_bytepp),
PNG_EMPTY);
PNG_INTERNAL_FUNCTION(int,
png_do_expand_palette_neon_rgb,
(png_structrp,
png_row_infop,
png_const_bytep,
const png_bytepp,
const png_bytepp),
PNG_EMPTY);
#endif
/* Maintainer: Put new private prototypes here ^ */
#include "pngdebug.h"

32
src/3rdparty/libpng/pngread.c vendored
View File

@ -1,10 +1,10 @@
/* pngread.c - read a PNG file
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -1621,7 +1621,7 @@ png_image_skip_unused_chunks(png_structrp png_ptr)
* errors (which are unfortunately quite common.)
*/
{
static PNG_CONST png_byte chunks_to_process[] = {
static const png_byte chunks_to_process[] = {
98, 75, 71, 68, '\0', /* bKGD */
99, 72, 82, 77, '\0', /* cHRM */
103, 65, 77, 65, '\0', /* gAMA */
@ -1758,9 +1758,9 @@ png_create_colormap_entry(png_image_read_control *display,
png_uint_32 alpha, int encoding)
{
png_imagep image = display->image;
const int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) != 0 ?
int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) != 0 ?
P_LINEAR : P_sRGB;
const int convert_to_Y = (image->format & PNG_FORMAT_FLAG_COLOR) == 0 &&
int convert_to_Y = (image->format & PNG_FORMAT_FLAG_COLOR) == 0 &&
(red != green || green != blue);
if (ip > 255)
@ -1869,13 +1869,13 @@ png_create_colormap_entry(png_image_read_control *display,
/* Store the value. */
{
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
const int afirst = (image->format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
int afirst = (image->format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(image->format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else
# define afirst 0
# endif
# ifdef PNG_FORMAT_BGR_SUPPORTED
const int bgr = (image->format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
int bgr = (image->format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
# else
# define bgr 0
# endif
@ -2085,11 +2085,11 @@ png_image_read_colormap(png_voidp argument)
{
png_image_read_control *display =
png_voidcast(png_image_read_control*, argument);
const png_imagep image = display->image;
png_imagep image = display->image;
const png_structrp png_ptr = image->opaque->png_ptr;
const png_uint_32 output_format = image->format;
const int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) != 0 ?
png_structrp png_ptr = image->opaque->png_ptr;
png_uint_32 output_format = image->format;
int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) != 0 ?
P_LINEAR : P_sRGB;
unsigned int cmap_entries;
@ -2802,7 +2802,7 @@ png_image_read_colormap(png_voidp argument)
unsigned int num_trans = png_ptr->num_trans;
png_const_bytep trans = num_trans > 0 ? png_ptr->trans_alpha : NULL;
png_const_colorp colormap = png_ptr->palette;
const int do_background = trans != NULL &&
int do_background = trans != NULL &&
(output_format & PNG_FORMAT_FLAG_ALPHA) == 0;
unsigned int i;
@ -3946,7 +3946,7 @@ png_image_read_direct(png_voidp argument)
*/
if (linear != 0)
{
PNG_CONST png_uint_16 le = 0x0001;
png_uint_16 le = 0x0001;
if ((*(png_const_bytep) & le) != 0)
png_set_swap(png_ptr);
@ -4108,7 +4108,7 @@ png_image_finish_read(png_imagep image, png_const_colorp background,
* 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);
unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format);
/* The following checks just the 'row_stride' calculation to ensure it
* fits in a signed 32-bit value. Because channels/components can be
@ -4119,7 +4119,7 @@ png_image_finish_read(png_imagep image, png_const_colorp background,
if (image->width <= 0x7fffffffU/channels) /* no overflow */
{
png_uint_32 check;
const png_uint_32 png_row_stride = image->width * channels;
png_uint_32 png_row_stride = image->width * channels;
if (row_stride == 0)
row_stride = (png_int_32)/*SAFE*/png_row_stride;

6
src/3rdparty/libpng/pngrio.c vendored
View File

@ -1,10 +1,10 @@
/* pngrio.c - functions for data input
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2016,2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer

88
src/3rdparty/libpng/pngrtran.c vendored
View File

@ -1,10 +1,10 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -18,6 +18,17 @@
#include "pngpriv.h"
#ifdef PNG_ARM_NEON_IMPLEMENTATION
# if PNG_ARM_NEON_IMPLEMENTATION == 1
# define PNG_ARM_NEON_INTRINSICS_AVAILABLE
# if defined(_MSC_VER) && defined(_M_ARM64)
# include <arm64_neon.h>
# else
# include <arm_neon.h>
# endif
# endif
#endif
#ifdef PNG_READ_SUPPORTED
/* Set the action on getting a CRC error for an ancillary or critical chunk. */
@ -2986,7 +2997,6 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
*/
static int
png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
{
int rgb_error = 0;
@ -2995,12 +3005,11 @@ png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
if ((row_info->color_type & PNG_COLOR_MASK_PALETTE) == 0 &&
(row_info->color_type & PNG_COLOR_MASK_COLOR) != 0)
{
PNG_CONST png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
PNG_CONST png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
PNG_CONST png_uint_32 bc = 32768 - rc - gc;
PNG_CONST png_uint_32 row_width = row_info->width;
PNG_CONST int have_alpha =
(row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0;
png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
png_uint_32 bc = 32768 - rc - gc;
png_uint_32 row_width = row_info->width;
int have_alpha = (row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0;
if (row_info->bit_depth == 8)
{
@ -4143,12 +4152,11 @@ png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
{
if (row_info->bit_depth == 8)
{
PNG_CONST png_bytep table = png_ptr->gamma_from_1;
png_bytep table = png_ptr->gamma_from_1;
if (table != NULL)
{
PNG_CONST int step =
(row_info->color_type & PNG_COLOR_MASK_COLOR) ? 4 : 2;
int step = (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 4 : 2;
/* The alpha channel is the last component: */
row += step - 1;
@ -4162,13 +4170,12 @@ png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
else if (row_info->bit_depth == 16)
{
PNG_CONST png_uint_16pp table = png_ptr->gamma_16_from_1;
PNG_CONST int gamma_shift = png_ptr->gamma_shift;
png_uint_16pp table = png_ptr->gamma_16_from_1;
int gamma_shift = png_ptr->gamma_shift;
if (table != NULL)
{
PNG_CONST int step =
(row_info->color_type & PNG_COLOR_MASK_COLOR) ? 8 : 4;
int step = (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 8 : 4;
/* The alpha channel is the last component: */
row += step - 2;
@ -4199,8 +4206,9 @@ png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
* upon whether you supply trans and num_trans.
*/
static void
png_do_expand_palette(png_row_infop row_info, png_bytep row,
png_const_colorp palette, png_const_bytep trans_alpha, int num_trans)
png_do_expand_palette(png_structrp png_ptr, png_row_infop row_info,
png_bytep row, png_const_colorp palette, png_const_bytep trans_alpha,
int num_trans)
{
int shift, value;
png_bytep sp, dp;
@ -4304,14 +4312,25 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
sp = row + (size_t)row_width - 1;
dp = row + ((size_t)row_width << 2) - 1;
for (i = 0; i < row_width; i++)
i = 0;
#ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE
if (png_ptr->riffled_palette != NULL)
{
/* The RGBA optimization works with png_ptr->bit_depth == 8
* but sometimes row_info->bit_depth has been changed to 8.
* In these cases, the palette hasn't been riffled.
*/
i = png_do_expand_palette_neon_rgba(png_ptr, row_info, row,
&sp, &dp);
}
#endif
for (; i < row_width; i++)
{
if ((int)(*sp) >= num_trans)
*dp-- = 0xff;
else
*dp-- = trans_alpha[*sp];
*dp-- = palette[*sp].blue;
*dp-- = palette[*sp].green;
*dp-- = palette[*sp].red;
@ -4328,8 +4347,13 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
{
sp = row + (size_t)row_width - 1;
dp = row + (size_t)(row_width * 3) - 1;
i = 0;
#ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE
i = png_do_expand_palette_neon_rgb(png_ptr, row_info, row,
&sp, &dp);
#endif
for (i = 0; i < row_width; i++)
for (; i < row_width; i++)
{
*dp-- = palette[*sp].blue;
*dp-- = palette[*sp].green;
@ -4743,8 +4767,22 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info)
{
if (row_info->color_type == PNG_COLOR_TYPE_PALETTE)
{
png_do_expand_palette(row_info, png_ptr->row_buf + 1,
png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
#ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE
if ((png_ptr->num_trans > 0) && (png_ptr->bit_depth == 8))
{
/* Allocate space for the decompressed full palette. */
if (png_ptr->riffled_palette == NULL)
{
png_ptr->riffled_palette = png_malloc(png_ptr, 256*4);
if (png_ptr->riffled_palette == NULL)
png_error(png_ptr, "NULL row buffer");
/* Build the RGBA palette. */
png_riffle_palette_rgba(png_ptr, row_info);
}
}
#endif
png_do_expand_palette(png_ptr, row_info, png_ptr->row_buf + 1,
png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
}
else

39
src/3rdparty/libpng/pngrutil.c vendored
View File

@ -1,10 +1,10 @@
/* pngrutil.c - utilities to read a PNG file
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -1461,8 +1461,7 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
{
/* We have the ICC profile header; do the basic header checks.
*/
const png_uint_32 profile_length =
png_get_uint_32(profile_header);
png_uint_32 profile_length = png_get_uint_32(profile_header);
if (png_icc_check_length(png_ptr, &png_ptr->colorspace,
keyword, profile_length) != 0)
@ -1479,8 +1478,8 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
* profile. The header check has already validated
* that none of this stuff will overflow.
*/
const png_uint_32 tag_count = png_get_uint_32(
profile_header+128);
png_uint_32 tag_count =
png_get_uint_32(profile_header + 128);
png_bytep profile = png_read_buffer(png_ptr,
profile_length, 2/*silent*/);
@ -3132,7 +3131,7 @@ png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr,
*/
void /* PRIVATE */
png_check_chunk_name(png_const_structrp png_ptr, const png_uint_32 chunk_name)
png_check_chunk_name(png_const_structrp png_ptr, png_uint_32 chunk_name)
{
int i;
png_uint_32 cn=chunk_name;
@ -3151,7 +3150,7 @@ png_check_chunk_name(png_const_structrp png_ptr, const png_uint_32 chunk_name)
}
void /* PRIVATE */
png_check_chunk_length(png_const_structrp png_ptr, const png_uint_32 length)
png_check_chunk_length(png_const_structrp png_ptr, png_uint_32 length)
{
png_alloc_size_t limit = PNG_UINT_31_MAX;
@ -3363,7 +3362,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
/* Hence the pre-compiled masks indexed by PACKSWAP (or not), depth and
* then pass:
*/
static PNG_CONST png_uint_32 row_mask[2/*PACKSWAP*/][3/*depth*/][6] =
static const png_uint_32 row_mask[2/*PACKSWAP*/][3/*depth*/][6] =
{
/* Little-endian byte masks for PACKSWAP */
{ S_MASKS(1,0), S_MASKS(2,0), S_MASKS(4,0) },
@ -3374,7 +3373,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
/* display_mask has only three entries for the odd passes, so index by
* pass>>1.
*/
static PNG_CONST png_uint_32 display_mask[2][3][3] =
static const png_uint_32 display_mask[2][3][3] =
{
/* Little-endian byte masks for PACKSWAP */
{ B_MASKS(1,0), B_MASKS(2,0), B_MASKS(4,0) },
@ -3687,7 +3686,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
{
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Offset to next interlace block */
static PNG_CONST unsigned int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static const unsigned int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
png_debug(1, "in png_do_read_interlace");
if (row != NULL && row_info != NULL)
@ -4329,16 +4328,16 @@ png_read_finish_row(png_structrp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
static const png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
static const png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
png_debug(1, "in png_read_finish_row");
png_ptr->row_number++;
@ -4394,16 +4393,16 @@ png_read_start_row(png_structrp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
static const png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
static const png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
unsigned int max_pixel_depth;
size_t row_bytes;

12
src/3rdparty/libpng/pngset.c vendored
View File

@ -1,10 +1,10 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -137,7 +137,7 @@ png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X,
#ifdef PNG_eXIf_SUPPORTED
void PNGAPI
png_set_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
const png_bytep eXIf_buf)
png_bytep eXIf_buf)
{
png_warning(png_ptr, "png_set_eXIf does not work; use png_set_eXIf_1");
PNG_UNUSED(info_ptr)
@ -146,7 +146,7 @@ png_set_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
void PNGAPI
png_set_eXIf_1(png_const_structrp png_ptr, png_inforp info_ptr,
const png_uint_32 num_exif, const png_bytep eXIf_buf)
png_uint_32 num_exif, png_bytep eXIf_buf)
{
int i;
@ -1399,7 +1399,7 @@ png_set_keep_unknown_chunks(png_structrp png_ptr, int keep,
/* Ignore all unknown chunks and all chunks recognized by
* libpng except for IHDR, PLTE, tRNS, IDAT, and IEND
*/
static PNG_CONST png_byte chunks_to_ignore[] = {
static const png_byte chunks_to_ignore[] = {
98, 75, 71, 68, '\0', /* bKGD */
99, 72, 82, 77, '\0', /* cHRM */
101, 88, 73, 102, '\0', /* eXIf */

10
src/3rdparty/libpng/pngstruct.h vendored
View File

@ -1,10 +1,10 @@
/* pngstruct.h - header file for PNG reference library
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -228,6 +228,10 @@ struct png_struct_def
* big_row_buf; while writing it is separately
* allocated.
*/
#ifdef PNG_READ_EXPAND_SUPPORTED
/* Buffer to accelerate palette transformations. */
png_bytep riffled_palette;
#endif
#ifdef PNG_WRITE_FILTER_SUPPORTED
png_bytep try_row; /* buffer to save trial row when filtering */
png_bytep tst_row; /* buffer to save best trial row when filtering */

12
src/3rdparty/libpng/pngtrans.c vendored
View File

@ -1,10 +1,10 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -345,7 +345,7 @@ png_do_swap(png_row_infop row_info, png_bytep row)
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
static PNG_CONST png_byte onebppswaptable[256] = {
static const png_byte onebppswaptable[256] = {
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
@ -380,7 +380,7 @@ static PNG_CONST png_byte onebppswaptable[256] = {
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
};
static PNG_CONST png_byte twobppswaptable[256] = {
static const png_byte twobppswaptable[256] = {
0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
@ -415,7 +415,7 @@ static PNG_CONST png_byte twobppswaptable[256] = {
0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
};
static PNG_CONST png_byte fourbppswaptable[256] = {
static const png_byte fourbppswaptable[256] = {
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,

6
src/3rdparty/libpng/pngwio.c vendored
View File

@ -1,10 +1,10 @@
/* pngwio.c - functions for data output
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2014,2016,2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer

38
src/3rdparty/libpng/pngwrite.c vendored
View File

@ -1,10 +1,10 @@
/* pngwrite.c - general routines to write a PNG file
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -469,7 +469,7 @@ png_write_end(png_structrp png_ptr, png_inforp info_ptr)
#ifdef PNG_CONVERT_tIME_SUPPORTED
void PNGAPI
png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm * ttime)
png_convert_from_struct_tm(png_timep ptime, const struct tm * ttime)
{
png_debug(1, "in png_convert_from_struct_tm");
@ -948,6 +948,10 @@ png_write_destroy(png_structrp png_ptr)
png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list);
png_free(png_ptr, png_ptr->row_buf);
png_ptr->row_buf = NULL;
#ifdef PNG_READ_EXPANDED_SUPPORTED
png_free(png_ptr, png_ptr->riffled_palette);
png_ptr->riffled_palette = NULL;
#endif
#ifdef PNG_WRITE_FILTER_SUPPORTED
png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->try_row);
@ -1536,7 +1540,7 @@ png_write_image_16bit(png_voidp argument)
display->first_row);
png_uint_16p output_row = png_voidcast(png_uint_16p, display->local_row);
png_uint_16p row_end;
const unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
3 : 1;
int aindex = 0;
png_uint_32 y = image->height;
@ -1573,7 +1577,7 @@ png_write_image_16bit(png_voidp argument)
while (out_ptr < row_end)
{
const png_uint_16 alpha = in_ptr[aindex];
png_uint_16 alpha = in_ptr[aindex];
png_uint_32 reciprocal = 0;
int c;
@ -1695,7 +1699,7 @@ png_write_image_8bit(png_voidp argument)
display->first_row);
png_bytep output_row = png_voidcast(png_bytep, display->local_row);
png_uint_32 y = image->height;
const unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
3 : 1;
if ((image->format & PNG_FORMAT_FLAG_ALPHA) != 0)
@ -1783,25 +1787,25 @@ png_write_image_8bit(png_voidp argument)
static void
png_image_set_PLTE(png_image_write_control *display)
{
const png_imagep image = display->image;
png_imagep image = display->image;
const void *cmap = display->colormap;
const int entries = image->colormap_entries > 256 ? 256 :
int entries = image->colormap_entries > 256 ? 256 :
(int)image->colormap_entries;
/* NOTE: the caller must check for cmap != NULL and entries != 0 */
const png_uint_32 format = image->format;
const unsigned int channels = PNG_IMAGE_SAMPLE_CHANNELS(format);
png_uint_32 format = image->format;
unsigned int channels = PNG_IMAGE_SAMPLE_CHANNELS(format);
# if defined(PNG_FORMAT_BGR_SUPPORTED) &&\
defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED)
const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else
# define afirst 0
# endif
# ifdef PNG_FORMAT_BGR_SUPPORTED
const int bgr = (format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
int bgr = (format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
# else
# define bgr 0
# endif
@ -1951,12 +1955,12 @@ png_image_write_main(png_voidp argument)
* and total image size to ensure that they are within the system limits.
*/
{
const unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format);
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;
png_uint_32 png_row_stride = image->width * channels;
if (display->row_stride == 0)
display->row_stride = (png_int_32)/*SAFE*/png_row_stride;
@ -2052,7 +2056,7 @@ png_image_write_main(png_voidp argument)
*/
if (write_16bit != 0)
{
PNG_CONST png_uint_16 le = 0x0001;
png_uint_16 le = 0x0001;
if ((*(png_const_bytep) & le) != 0)
png_set_swap(png_ptr);
@ -2166,7 +2170,7 @@ image_memory_write)(png_structp png_ptr, png_bytep/*const*/ data, 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;
png_alloc_size_t ob = display->output_bytes;
/* Check for overflow; this should never happen: */
if (size <= ((png_alloc_size_t)-1) - ob)

11
src/3rdparty/libpng/pngwtran.c vendored
View File

@ -1,10 +1,10 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2016,2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -254,8 +254,7 @@ png_do_shift(png_row_infop row_info, png_bytep row,
for (i = 0; i < istop; i++, bp++)
{
const unsigned int c = i%channels;
unsigned int c = i%channels;
int j;
unsigned int v, out;
@ -283,7 +282,7 @@ png_do_shift(png_row_infop row_info, png_bytep row,
for (bp = row, i = 0; i < istop; i++)
{
const unsigned int c = i%channels;
unsigned int c = i%channels;
int j;
unsigned int value, v;

38
src/3rdparty/libpng/pngwutil.c vendored
View File

@ -1,10 +1,10 @@
/* pngwutil.c - utilities to write a PNG file
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -1893,16 +1893,16 @@ png_write_start_row(png_structrp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
static const png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
static const png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
png_alloc_size_t buf_size;
@ -2008,16 +2008,16 @@ png_write_finish_row(png_structrp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
static const png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
static const png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
png_debug(1, "in png_write_finish_row");
@ -2098,10 +2098,10 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
png_debug(1, "in png_do_write_interlace");
@ -2276,7 +2276,7 @@ png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
#ifdef PNG_WRITE_FILTER_SUPPORTED
static size_t /* PRIVATE */
png_setup_sub_row(png_structrp png_ptr, const png_uint_32 bpp,
png_setup_sub_row(png_structrp png_ptr, png_uint_32 bpp,
size_t row_bytes, size_t lmins)
{
png_bytep rp, dp, lp;
@ -2315,7 +2315,7 @@ png_setup_sub_row(png_structrp png_ptr, const png_uint_32 bpp,
}
static void /* PRIVATE */
png_setup_sub_row_only(png_structrp png_ptr, const png_uint_32 bpp,
png_setup_sub_row_only(png_structrp png_ptr, png_uint_32 bpp,
size_t row_bytes)
{
png_bytep rp, dp, lp;
@ -2380,7 +2380,7 @@ png_setup_up_row_only(png_structrp png_ptr, size_t row_bytes)
}
static size_t /* PRIVATE */
png_setup_avg_row(png_structrp png_ptr, const png_uint_32 bpp,
png_setup_avg_row(png_structrp png_ptr, png_uint_32 bpp,
size_t row_bytes, size_t lmins)
{
png_bytep rp, dp, pp, lp;
@ -2420,7 +2420,7 @@ png_setup_avg_row(png_structrp png_ptr, const png_uint_32 bpp,
return (sum);
}
static void /* PRIVATE */
png_setup_avg_row_only(png_structrp png_ptr, const png_uint_32 bpp,
png_setup_avg_row_only(png_structrp png_ptr, png_uint_32 bpp,
size_t row_bytes)
{
png_bytep rp, dp, pp, lp;
@ -2442,7 +2442,7 @@ png_setup_avg_row_only(png_structrp png_ptr, const png_uint_32 bpp,
}
static size_t /* PRIVATE */
png_setup_paeth_row(png_structrp png_ptr, const png_uint_32 bpp,
png_setup_paeth_row(png_structrp png_ptr, png_uint_32 bpp,
size_t row_bytes, size_t lmins)
{
png_bytep rp, dp, pp, cp, lp;
@ -2503,7 +2503,7 @@ png_setup_paeth_row(png_structrp png_ptr, const png_uint_32 bpp,
return (sum);
}
static void /* PRIVATE */
png_setup_paeth_row_only(png_structrp png_ptr, const png_uint_32 bpp,
png_setup_paeth_row_only(png_structrp png_ptr, png_uint_32 bpp,
size_t row_bytes)
{
png_bytep rp, dp, pp, cp, lp;

6
src/3rdparty/libpng/qt_attribution.json vendored
View File

@ -6,9 +6,9 @@
"Description": "libpng is the official PNG reference library.",
"Homepage": "http://www.libpng.org/pub/png/libpng.html",
"Version": "1.6.35",
"License": "libpng License",
"LicenseId": "Libpng",
"Version": "1.6.36",
"License": "libpng License and libpng License 2",
"LicenseId": "Libpng AND Libpng2",
"LicenseFile": "LICENSE",
"Copyright": "Copyright (c) 1998-2018 Glenn Randers-Pehrson
Copyright (c) 2000-2017 Simon-Pierre Cadieux