Upgrade bundled libpng to version 1.6.40 - cont'd
This commit is contained in:
ManoloFLTK
parent
2fdd1cea91
commit
1127ebfcd3
33
png/ANNOUNCE
33
png/ANNOUNCE
@ -1,5 +1,5 @@
|
||||
libpng 1.6.37 - April 14, 2019
|
||||
==============================
|
||||
libpng 1.6.40 - June 21, 2023
|
||||
=============================
|
||||
|
||||
This is a public release of libpng, intended for use in production code.
|
||||
|
||||
@ -9,13 +9,13 @@ Files available for download
|
||||
|
||||
Source files with LF line endings (for Unix/Linux):
|
||||
|
||||
* libpng-1.6.37.tar.xz (LZMA-compressed, recommended)
|
||||
* libpng-1.6.37.tar.gz
|
||||
* libpng-1.6.40.tar.xz (LZMA-compressed, recommended)
|
||||
* libpng-1.6.40.tar.gz
|
||||
|
||||
Source files with CRLF line endings (for Windows):
|
||||
|
||||
* lp1637.7z (LZMA-compressed, recommended)
|
||||
* lp1637.zip
|
||||
* lpng1640.7z (LZMA-compressed, recommended)
|
||||
* lpng1640.zip
|
||||
|
||||
Other information:
|
||||
|
||||
@ -25,20 +25,15 @@ Other information:
|
||||
* TRADEMARK.md
|
||||
|
||||
|
||||
Changes since the previous public release (version 1.6.36)
|
||||
----------------------------------------------------------
|
||||
Changes from version 1.6.39 to version 1.6.40
|
||||
---------------------------------------------
|
||||
|
||||
* Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free.
|
||||
* Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette.
|
||||
* Fixed a memory leak in pngtest.c.
|
||||
* Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in
|
||||
contrib/pngminus; refactor.
|
||||
* Changed the license of contrib/pngminus to MIT; refresh makefile and docs.
|
||||
(Contributed by Willem van Schaik)
|
||||
* Fixed a typo in the libpng license v2.
|
||||
(Contributed by Miguel Ojeda)
|
||||
* Added makefiles for AddressSanitizer-enabled builds.
|
||||
* Cleaned up various makefiles.
|
||||
* Fixed the eXIf chunk multiplicity checks.
|
||||
* Fixed a memory leak in pCAL processing.
|
||||
* Corrected the validity report about tRNS inside png_get_valid().
|
||||
* Fixed various build issues on *BSD, Mac and Windows.
|
||||
* Updated the configurations and the scripts for continuous integration.
|
||||
* Cleaned up the code, the build scripts, and the documentation.
|
||||
|
||||
|
||||
Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
|
||||
|
||||
20
png/CHANGES
20
png/CHANGES
@ -204,7 +204,7 @@ Version 0.97 [January, 1998]
|
||||
Added simple sRGB support (Glenn R-P)
|
||||
Easier conditional compiling, e.g.,
|
||||
define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
|
||||
all configurable options can be selected from command-line instead
|
||||
all configurable options can be selected from command line instead
|
||||
of having to edit pngconf.h (Glenn R-P)
|
||||
Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
|
||||
Added more conditions for png_do_background, to avoid changing
|
||||
@ -942,7 +942,7 @@ Version 1.0.8 [July 24, 2000]
|
||||
Version 1.0.9beta1 [November 10, 2000]
|
||||
Fixed typo in scripts/makefile.hpux
|
||||
Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
|
||||
Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
|
||||
Fixed sequence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
|
||||
Changed "cdrom.com" in documentation to "libpng.org"
|
||||
Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
|
||||
Changed type of "params" from voidp to png_voidp in png_read|write_png().
|
||||
@ -2295,7 +2295,7 @@ Version 1.4.0beta58 [May 14, 2009]
|
||||
Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
|
||||
|
||||
Version 1.4.0beta59 [May 15, 2009]
|
||||
Reformated sources in libpng style (3-space indentation, comment format)
|
||||
Reformatted sources in libpng style (3-space indentation, comment format)
|
||||
Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
|
||||
Added sections about the git repository and our coding style to the
|
||||
documentation
|
||||
@ -2661,7 +2661,7 @@ Version 1.4.1beta06 [January 28, 2010]
|
||||
|
||||
Version 1.4.1beta07 [February 6, 2010]
|
||||
Folded some long lines in the source files.
|
||||
Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
|
||||
Added definable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
|
||||
and a PNG_USER_LIMITS_SUPPORTED flag.
|
||||
Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as
|
||||
png_ptr->png_user_chunk_malloc_max.
|
||||
@ -3919,7 +3919,7 @@ Version 1.6.0beta08 [February 1, 2012]
|
||||
version checking to configure.ac
|
||||
Improved pngstest speed by not doing redundant tests and add const to
|
||||
the background parameter of png_image_finish_read. The --background
|
||||
option is now done automagically only when required, so that commandline
|
||||
option is now done automagically only when required, so that command-line
|
||||
option no longer exists.
|
||||
Cleaned up pngpriv.h to consistently declare all functions and data.
|
||||
Also eliminated PNG_CONST_DATA, which is apparently not needed but we
|
||||
@ -5927,7 +5927,7 @@ Version 1.6.32beta03 [August 2, 2017]
|
||||
(Bug report from the OSS-fuzz project).
|
||||
|
||||
Version 1.6.32beta04 [August 2, 2017]
|
||||
Replaced local eXIf_buf with info_ptr-eXIf_buf in png_handle_eXIf().
|
||||
Replaced local eXIf_buf with info_ptr->eXIf_buf in png_handle_eXIf().
|
||||
Update libpng.3 and libpng-manual.txt about eXIf functions.
|
||||
|
||||
Version 1.6.32beta05 [August 2, 2017]
|
||||
@ -6121,6 +6121,14 @@ Version 1.6.39 [November 20, 2022]
|
||||
removed the obsolete makefile.cegcc.
|
||||
Cleaned up the code and updated the internal documentation.
|
||||
|
||||
Version 1.6.40 [June 21, 2023]
|
||||
Fixed the eXIf chunk multiplicity checks.
|
||||
Fixed a memory leak in pCAL processing.
|
||||
Corrected the validity report about tRNS inside png_get_valid().
|
||||
Fixed various build issues on *BSD, Mac and Windows.
|
||||
Updated the configurations and the scripts for continuous integration.
|
||||
Cleaned up the code, the build scripts, and the documentation.
|
||||
|
||||
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
|
||||
|
||||
87
png/INSTALL
87
png/INSTALL
@ -128,16 +128,18 @@ Your directory structure should look like this:
|
||||
README
|
||||
*.h, *.c => libpng source files
|
||||
CMakeLists.txt => "cmake" script
|
||||
ci
|
||||
ci_*.sh
|
||||
configuration files:
|
||||
configure.ac, configure, Makefile.am, Makefile.in,
|
||||
autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in,
|
||||
libpng-config.in, aclocal.m4, config.h.in, config.sub,
|
||||
depcomp, install-sh, mkinstalldirs, test-pngtest.sh
|
||||
depcomp, install-sh, mkinstalldirs, test-pngtest.sh, etc.
|
||||
contrib
|
||||
arm-neon, conftest, examples, gregbook, libtests, pngminim,
|
||||
pngminus, pngsuite, tools, visupng
|
||||
projects
|
||||
cbuilder5, owatcom, visualc71, vstudio, xcode
|
||||
owatcom, visualc71, vstudio
|
||||
scripts
|
||||
makefile.*
|
||||
*.def (module definition files)
|
||||
@ -145,7 +147,7 @@ Your directory structure should look like this:
|
||||
pngtest.png
|
||||
etc.
|
||||
zlib
|
||||
README, *.h, *.c contrib, etc.
|
||||
README, *.h, *.c, contrib, etc.
|
||||
|
||||
If the line endings in the files look funny, you may wish to get the other
|
||||
distribution of libpng. It is available in both tar.gz (UNIX style line
|
||||
@ -153,28 +155,27 @@ endings) and zip (DOS style line endings) formats.
|
||||
|
||||
VI. Building with project files
|
||||
|
||||
If you are building libpng with MSVC, you can enter the
|
||||
libpng projects\visualc71 or vstudio directory and follow the instructions
|
||||
in README.txt.
|
||||
If you are building libpng with Microsoft Visual Studio, you can enter
|
||||
the directory projects\visualc71 or projects\vstudio and follow the
|
||||
instructions in README.txt.
|
||||
|
||||
Otherwise enter the zlib directory and follow the instructions in zlib/README,
|
||||
then come back here and run "configure" or choose the appropriate
|
||||
makefile.sys in the scripts directory.
|
||||
Otherwise, enter the zlib directory and follow the instructions in
|
||||
zlib/README, then come back here and run "configure" or choose the
|
||||
appropriate makefile in the scripts directory.
|
||||
|
||||
VII. Building with makefiles
|
||||
|
||||
Copy the file (or files) that you need from the
|
||||
scripts directory into this directory, for example
|
||||
|
||||
MSDOS example:
|
||||
|
||||
copy scripts\makefile.msc makefile
|
||||
copy scripts\pnglibconf.h.prebuilt pnglibconf.h
|
||||
|
||||
UNIX example:
|
||||
|
||||
cp scripts/makefile.std makefile
|
||||
cp scripts/pnglibconf.h.prebuilt pnglibconf.h
|
||||
cp scripts/makefile.std Makefile
|
||||
make
|
||||
|
||||
Windows example:
|
||||
|
||||
nmake -f scripts\makefile.vcwin32
|
||||
|
||||
Read the makefile to see if you need to change any source or
|
||||
target directories to match your preferences.
|
||||
@ -191,36 +192,33 @@ test. For more confidence, you can run another test by typing
|
||||
Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
|
||||
your output with the result shown in contrib/pngsuite/README.
|
||||
|
||||
Most of the makefiles will allow you to run "make install" to
|
||||
put the library in its final resting place (if you want to
|
||||
do that, run "make install" in the zlib directory first if necessary).
|
||||
Some also allow you to run "make test-installed" after you have
|
||||
run "make install".
|
||||
Most of the makefiles used to allow you to run "make install" to put
|
||||
the library in its final resting place, but that feature is no longer
|
||||
supported. The only tested and supported manners to install libpng are
|
||||
the conventional build and install procedures driven by the configure
|
||||
script or by the CMake file.
|
||||
|
||||
VIII. Configuring libpng for 16-bit platforms
|
||||
VIII. Configuring for DOS and other 16-bit platforms
|
||||
|
||||
You will want to look into zconf.h to tell zlib (and thus libpng) that
|
||||
it cannot allocate more than 64K at a time. Even if you can, the memory
|
||||
won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K.
|
||||
|
||||
IX. Configuring for DOS
|
||||
Officially, the support for 16-bit platforms has been removed.
|
||||
|
||||
For DOS users who only have access to the lower 640K, you will
|
||||
have to limit zlib's memory usage via a png_set_compression_mem_level()
|
||||
call. See zlib.h or zconf.h in the zlib library for more information.
|
||||
|
||||
X. Configuring for Medium Model
|
||||
You may be or may not be in luck if you target the "large" memory model,
|
||||
but all the smaller models ("small", "compact" and "medium") are known
|
||||
to be unworkable. For DOS users who have access beyond the lower 640K,
|
||||
a "flat" 32-bit DOS model (such as DJGPP) is strongly recommended.
|
||||
|
||||
Libpng's support for medium model has been tested on most of the popular
|
||||
compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets
|
||||
defined, and FAR gets defined to far in pngconf.h, and you should be
|
||||
all set. Everything in the library (except for zlib's structure) is
|
||||
expecting far data. You must use the typedefs with the p or pp on
|
||||
the end for pointers (or at least look at them and be careful). Make
|
||||
note that the rows of data are defined as png_bytepp, which is
|
||||
an "unsigned char far * far *".
|
||||
For DOS users who only have access to the lower 640K, you will have to
|
||||
limit zlib's memory usage via a png_set_compression_mem_level() call.
|
||||
You will also have to look into zconf.h to tell zlib (and thus libpng)
|
||||
that it cannot allocate more than 64K at a time. Even if you can, the
|
||||
memory won't be accessible. Therefore, you should limit zlib and libpng
|
||||
to 64K by defining MAXSEG_64K.
|
||||
|
||||
XI. Prepending a prefix to exported symbols
|
||||
IX. Prepending a prefix to exported symbols
|
||||
|
||||
Starting with libpng-1.6.0, you can configure libpng (when using the
|
||||
"configure" script) to prefix all exported symbols by means of the
|
||||
@ -231,7 +229,7 @@ identifier). This creates a set of macros in pnglibconf.h, so this is
|
||||
transparent to applications; their function calls get transformed by
|
||||
the macros to use the modified names.
|
||||
|
||||
XII. Configuring for compiler xxx:
|
||||
X. Configuring for compiler xxx:
|
||||
|
||||
All includes for libpng are in pngconf.h. If you need to add, change
|
||||
or delete an include, this is the place to do it.
|
||||
@ -243,7 +241,7 @@ As of libpng-1.5.0, pngpriv.h also includes three other private header
|
||||
files, pngstruct.h, pnginfo.h, and pngdebug.h, which contain material
|
||||
that previously appeared in the public headers.
|
||||
|
||||
XIII. Removing unwanted object code
|
||||
XI. Removing unwanted object code
|
||||
|
||||
There are a bunch of #define's in pngconf.h that control what parts of
|
||||
libpng are compiled. All the defines end in _SUPPORTED. If you are
|
||||
@ -282,7 +280,7 @@ library to fail if they call functions not available in your library.
|
||||
The size of the library itself should not be an issue, because only
|
||||
those sections that are actually used will be loaded into memory.
|
||||
|
||||
XIV. Enabling or disabling hardware optimizations
|
||||
XII. Enabling or disabling hardware optimizations
|
||||
|
||||
Certain hardware capabilities, such as the Intel SSE instructions,
|
||||
are normally detected at run time. Enable them with configure options
|
||||
@ -332,7 +330,7 @@ or disable them all at once with
|
||||
|
||||
cmake . -DPNG_HARDWARE_OPTIMIZATIONS=no
|
||||
|
||||
XV. Changes to the build and configuration of libpng in libpng-1.5.x
|
||||
XIII. Changes to the build and configuration of libpng in libpng-1.5.x
|
||||
|
||||
Details of internal changes to the library code can be found in the CHANGES
|
||||
file and in the GIT repository logs. These will be of no concern to the vast
|
||||
@ -423,7 +421,7 @@ $PREFIX/include directory). Do not edit pnglibconf.h after you have built
|
||||
libpng, because than the settings would not accurately reflect the settings
|
||||
that were used to build libpng.
|
||||
|
||||
XVI. Setjmp/longjmp issues
|
||||
XIV. Setjmp/longjmp issues
|
||||
|
||||
Libpng uses setjmp()/longjmp() for error handling. Unfortunately setjmp()
|
||||
is known to be not thread-safe on some platforms and we don't know of
|
||||
@ -441,7 +439,7 @@ This requires setjmp/longjmp, so you must either build the library
|
||||
with PNG_SETJMP_SUPPORTED defined, or with PNG_SIMPLIFIED_READ_SUPPORTED
|
||||
and PNG_SIMPLIFIED_WRITE_SUPPORTED undefined.
|
||||
|
||||
XVII. Common linking failures
|
||||
XV. Common linking failures
|
||||
|
||||
If your application fails to find libpng or zlib entries while linking:
|
||||
|
||||
@ -453,12 +451,13 @@ If your application fails to find libpng or zlib entries while linking:
|
||||
If you are using the vstudio project, observe the WARNING in
|
||||
project/vstudio/README.txt.
|
||||
|
||||
XVIII. Other sources of information about libpng:
|
||||
XVI. Other sources of information about libpng:
|
||||
|
||||
Further information can be found in the README and libpng-manual.txt
|
||||
files, in the individual makefiles, in png.h, and the manual pages
|
||||
libpng.3 and png.5.
|
||||
|
||||
Copyright (c) 2022 Cosmin Truta
|
||||
Copyright (c) 1998-2002,2006-2016 Glenn Randers-Pehrson
|
||||
This document is released under the libpng license.
|
||||
For conditions of distribution and use, see the disclaimer
|
||||
|
||||
@ -4,8 +4,8 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
|
||||
PNG Reference Library License version 2
|
||||
---------------------------------------
|
||||
|
||||
* Copyright (c) 1995-2019 The PNG Reference Library Authors.
|
||||
* Copyright (c) 2018-2019 Cosmin Truta.
|
||||
* Copyright (c) 1995-2023 The PNG Reference Library Authors.
|
||||
* Copyright (c) 2018-2023 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.
|
||||
|
||||
227
png/README
227
png/README
@ -1,57 +1,88 @@
|
||||
README for libpng version 1.6.37 - April 14, 2019
|
||||
=================================================
|
||||
README for libpng version 1.6.40
|
||||
================================
|
||||
|
||||
See the note about version numbers near the top of png.h.
|
||||
See INSTALL for instructions on how to install libpng.
|
||||
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 comes in several distribution formats. Get `libpng-*.tar.gz`
|
||||
or `libpng-*.tar.xz` 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
|
||||
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
|
||||
March 1998.
|
||||
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`.
|
||||
|
||||
****
|
||||
Note that some of the changes to the png_info structure render this
|
||||
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 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 https://libpng.sourceforge.io
|
||||
in the download area, and at http://libpng.download/src .
|
||||
|
||||
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 and commendations to `png-mng-implement`
|
||||
at `lists.sourceforge.net`. (Subscription is required; visit
|
||||
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
|
||||
to subscribe.)
|
||||
|
||||
Send general questions about the PNG specification to `png-mng-misc`
|
||||
at `lists.sourceforge.net`. (Subscription is required; visit
|
||||
https://lists.sourceforge.net/lists/listinfo/png-mng-misc
|
||||
to subscribe.)
|
||||
|
||||
Historical notes
|
||||
----------------
|
||||
|
||||
The libpng library has been in extensive use and testing since mid-1995.
|
||||
Version 0.89, published a year later, was the first official release.
|
||||
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 below 1.0. Version 1.0.0 was
|
||||
released in March 1998.
|
||||
|
||||
Note that some of the changes to the `png_info` structure render this
|
||||
version of the library binary incompatible with libpng-0.89 or
|
||||
earlier versions if you are using a shared library. The type of the
|
||||
"filler" parameter for png_set_filler() has changed from png_byte to
|
||||
png_uint_32, which will affect shared-library applications that use
|
||||
this function.
|
||||
`filler` parameter for `png_set_filler()` has changed from `png_byte`
|
||||
to `png_uint_32`, which will affect shared-library applications that
|
||||
use this function.
|
||||
|
||||
To avoid problems with changes to the internals of the png info_struct,
|
||||
To avoid problems with changes to the internals of the `info_struct`,
|
||||
new APIs have been made available in 0.95 to avoid direct application
|
||||
access to info_ptr. These functions are the png_set_<chunk> and
|
||||
png_get_<chunk> functions. These functions should be used when
|
||||
accessing/storing the info_struct data, rather than manipulating it
|
||||
access to `info_ptr`. These functions are the `png_set_<chunk>` and
|
||||
`png_get_<chunk>` functions. These functions should be used when
|
||||
accessing/storing the `info_struct` data, rather than manipulating it
|
||||
directly, to avoid such problems in the future.
|
||||
|
||||
It is important to note that the APIs did not make current programs
|
||||
that access the info struct directly incompatible with the new
|
||||
library, through libpng-1.2.x. In libpng-1.4.x, which was meant to
|
||||
be a transitional release, members of the png_struct and the
|
||||
info_struct can still be accessed, but the compiler will issue a
|
||||
be a transitional release, members of the `png_struct` and the
|
||||
`info_struct` can still be accessed, but the compiler will issue a
|
||||
warning about deprecated usage. Since libpng-1.5.0, direct access
|
||||
to these structs is not allowed, and the definitions of the structs
|
||||
reside in private pngstruct.h and pnginfo.h header files that are not
|
||||
accessible to applications. It is strongly suggested that new
|
||||
programs use the new APIs (as shown in example.c and pngtest.c), and
|
||||
older programs be converted to the new format, to facilitate upgrades
|
||||
in the future.
|
||||
****
|
||||
|
||||
Additions since 0.90 include the ability to compile libpng as a
|
||||
Windows DLL, and new APIs for accessing data in the info struct.
|
||||
Experimental functions include the ability to set weighting and cost
|
||||
factors for row filter selection, direct reads of integers from buffers
|
||||
on big-endian processors that support misaligned data access, faster
|
||||
methods of doing alpha composition, and more accurate 16->8 bit color
|
||||
conversion.
|
||||
reside in private `pngstruct.h` and `pnginfo.h` header files that are
|
||||
not accessible to applications. It is strongly suggested that new
|
||||
programs use the new APIs (as shown in `example.c` and `pngtest.c`),
|
||||
and older programs be converted to the new format, to facilitate
|
||||
upgrades in the future.
|
||||
|
||||
The additions since 0.89 include the ability to read from a PNG stream
|
||||
which has had some (or all) of the signature bytes read by the calling
|
||||
@ -61,64 +92,31 @@ 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.
|
||||
|
||||
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
|
||||
The additions since 0.90 include the ability to compile libpng as a
|
||||
Windows DLL, and new APIs for accessing data in the `info_struct`.
|
||||
Experimental functions included the ability to set weighting and cost
|
||||
factors for row filter selection, direct reads of integers from buffers
|
||||
on big-endian processors that support misaligned data access, faster
|
||||
methods of doing alpha composition, and more accurate 16-to-8 bit color
|
||||
conversion. Some of these experimental functions, such as the weighted
|
||||
filter heuristics, have since been removed.
|
||||
|
||||
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.
|
||||
|
||||
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 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 .
|
||||
|
||||
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
|
||||
lists.sourceforge.net (subscription required; visit
|
||||
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
|
||||
to subscribe).
|
||||
|
||||
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).
|
||||
|
||||
Files in this distribution:
|
||||
Files included 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
|
||||
INSTALL => Instructions to install libpng
|
||||
LICENSE => License to use and redistribute libpng
|
||||
README => This file
|
||||
TODO => Things not implemented in the current library
|
||||
TRADEMARK => Trademark information
|
||||
example.c => Example code for using libpng functions
|
||||
libpng.3 => manual page for libpng (includes libpng-manual.txt)
|
||||
libpng.3 => Manual page for libpng (includes libpng-manual.txt)
|
||||
libpng-manual.txt => Description of libpng and its functions
|
||||
libpngpf.3 => manual page for libpng's private functions
|
||||
png.5 => manual page for the PNG format
|
||||
libpngpf.3 => Manual page for libpng's private functions (deprecated)
|
||||
png.5 => Manual page for the PNG format
|
||||
png.c => Basic interface functions common to library
|
||||
png.h => Library function and interface declarations (public)
|
||||
pngpriv.h => Library function and interface declarations (private)
|
||||
@ -144,35 +142,36 @@ Files in this distribution:
|
||||
pngwrite.c => High-level write functions
|
||||
pngwtran.c => Write data transformations
|
||||
pngwutil.c => Write utility functions
|
||||
arm => Contains optimized code for the ARM platform
|
||||
powerpc => Contains optimized code for the PowerPC platform
|
||||
contrib => Contributions
|
||||
arm-neon => Optimized code for ARM-NEON platform
|
||||
powerpc-vsx => Optimized code for POWERPC-VSX platform
|
||||
examples => Example programs
|
||||
gregbook => source code for PNG reading and writing, from
|
||||
Greg Roelofs' "PNG: The Definitive Guide",
|
||||
arm/ => Optimized code for the ARM platform
|
||||
intel/ => Optimized code for the INTEL-SSE2 platform
|
||||
mips/ => Optimized code for the MIPS platform
|
||||
powerpc/ => Optimized code for the PowerPC platform
|
||||
ci/ => Scripts for continuous integration
|
||||
contrib/ => External contributions
|
||||
arm-neon/ => Optimized code for the ARM-NEON platform
|
||||
mips-msa/ => Optimized code for the MIPS-MSA platform
|
||||
powerpc-vsx/ => Optimized code for the POWERPC-VSX platform
|
||||
examples/ => Examples of libpng usage
|
||||
gregbook/ => Source code for PNG reading and writing, from
|
||||
"PNG: The Definitive Guide" by Greg Roelofs,
|
||||
O'Reilly, 1999
|
||||
libtests => Test programs
|
||||
mips-msa => Optimized code for MIPS-MSA platform
|
||||
pngminim => Minimal decoder, encoder, and progressive decoder
|
||||
programs demonstrating use of pngusr.dfa
|
||||
pngminus => Simple pnm2png and png2pnm programs
|
||||
pngsuite => Test images
|
||||
testpngs
|
||||
tools => Various tools
|
||||
visupng => Contains a MSVC workspace for VisualPng
|
||||
intel => Optimized code for INTEL-SSE2 platform
|
||||
mips => Optimized code for MIPS platform
|
||||
projects => Contains project files and workspaces for
|
||||
building a DLL
|
||||
owatcom => Contains a WATCOM project for building libpng
|
||||
visualc71 => Contains a Microsoft Visual C++ (MSVC)
|
||||
workspace for building libpng and zlib
|
||||
vstudio => Contains a Microsoft Visual C++ (MSVC)
|
||||
workspace for building libpng and zlib
|
||||
scripts => Directory containing scripts for building libpng:
|
||||
(see scripts/README.txt for the list of scripts)
|
||||
libtests/ => Test programs
|
||||
oss-fuzz/ => Files used by the OSS-Fuzz project for fuzz-testing
|
||||
libpng
|
||||
pngminim/ => Minimal decoder, encoder, and progressive decoder
|
||||
programs demonstrating the use of pngusr.dfa
|
||||
pngminus/ => Simple pnm2png and png2pnm programs
|
||||
pngsuite/ => Test images
|
||||
testpngs/ => Test images
|
||||
tools/ => Various tools
|
||||
visupng/ => VisualPng, a Windows viewer for PNG images
|
||||
projects/ => Project files and workspaces for various IDEs
|
||||
owatcom/ => OpenWatcom project
|
||||
visualc71/ => Microsoft Visual C++ 7.1 workspace
|
||||
vstudio/ => Microsoft Visual Studio workspace
|
||||
scripts/ => Scripts and makefiles for building libpng
|
||||
(see scripts/README.txt for the complete list)
|
||||
tests/ => Test scripts
|
||||
|
||||
Good luck, and happy coding!
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
libpng-manual.txt - A description on how to use and modify libpng
|
||||
|
||||
Copyright (c) 2018-2019 Cosmin Truta
|
||||
Copyright (c) 2018-2023 Cosmin Truta
|
||||
Copyright (c) 1998-2018 Glenn Randers-Pehrson
|
||||
|
||||
This document is released under the libpng license.
|
||||
@ -9,9 +9,9 @@ libpng-manual.txt - A description on how to use and modify libpng
|
||||
|
||||
Based on:
|
||||
|
||||
libpng version 1.6.36, December 2018, through 1.6.37 - April 2019
|
||||
libpng version 1.6.36, December 2018, through 1.6.40 - June 2023
|
||||
Updated and distributed by Cosmin Truta
|
||||
Copyright (c) 2018-2019 Cosmin Truta
|
||||
Copyright (c) 2018-2023 Cosmin Truta
|
||||
|
||||
libpng versions 0.97, January 1998, through 1.6.35 - July 2018
|
||||
Updated and distributed by Glenn Randers-Pehrson
|
||||
@ -1792,7 +1792,7 @@ the information. If, instead, you want to convert the image to an opaque
|
||||
version with no alpha channel use png_set_background; see below.
|
||||
|
||||
As of libpng version 1.5.2, almost all useful expansions are supported, the
|
||||
major ommissions are conversion of grayscale to indexed images (which can be
|
||||
major omissions are conversion of grayscale to indexed images (which can be
|
||||
done trivially in the application) and conversion of indexed to grayscale (which
|
||||
can be done by a trivial manipulation of the palette.)
|
||||
|
||||
|
||||
52
png/libpng.3
52
png/libpng.3
@ -1,6 +1,6 @@
|
||||
.TH LIBPNG 3 "April 14, 2019"
|
||||
.TH LIBPNG 3 "June 21, 2023"
|
||||
.SH NAME
|
||||
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.37
|
||||
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.40
|
||||
|
||||
.SH SYNOPSIS
|
||||
\fB#include <png.h>\fP
|
||||
@ -519,7 +519,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
|
||||
.SH LIBPNG.TXT
|
||||
libpng-manual.txt - A description on how to use and modify libpng
|
||||
|
||||
Copyright (c) 2018-2019 Cosmin Truta
|
||||
Copyright (c) 2018-2023 Cosmin Truta
|
||||
Copyright (c) 1998-2018 Glenn Randers-Pehrson
|
||||
|
||||
This document is released under the libpng license.
|
||||
@ -528,9 +528,9 @@ libpng-manual.txt - A description on how to use and modify libpng
|
||||
|
||||
Based on:
|
||||
|
||||
libpng version 1.6.36, December 2018, through 1.6.37 - April 2019
|
||||
libpng version 1.6.36, December 2018, through 1.6.40 - June 2023
|
||||
Updated and distributed by Cosmin Truta
|
||||
Copyright (c) 2018-2019 Cosmin Truta
|
||||
Copyright (c) 2018-2023 Cosmin Truta
|
||||
|
||||
libpng versions 0.97, January 1998, through 1.6.35 - July 2018
|
||||
Updated and distributed by Glenn Randers-Pehrson
|
||||
@ -2311,7 +2311,7 @@ the information. If, instead, you want to convert the image to an opaque
|
||||
version with no alpha channel use png_set_background; see below.
|
||||
|
||||
As of libpng version 1.5.2, almost all useful expansions are supported, the
|
||||
major ommissions are conversion of grayscale to indexed images (which can be
|
||||
major omissions are conversion of grayscale to indexed images (which can be
|
||||
done trivially in the application) and conversion of indexed to grayscale (which
|
||||
can be done by a trivial manipulation of the palette.)
|
||||
|
||||
@ -5995,35 +5995,25 @@ letter, until version 1.0.6j; from then on they were given the upcoming
|
||||
public release number plus "betaNN" or "rcNN".
|
||||
|
||||
.SH "SEE ALSO"
|
||||
.IR libpngpf(3) ", " png(5)
|
||||
.LP
|
||||
.IR libpng :
|
||||
.BR "png"(5)
|
||||
.IP
|
||||
https://libpng.sourceforge.io/ (follow the [DOWNLOAD] link)
|
||||
http://www.libpng.org/pub/png
|
||||
|
||||
The PNG (Portable Network Graphics) format specification.
|
||||
.LP
|
||||
.IR zlib :
|
||||
.B libpng
|
||||
.IP
|
||||
(generally) at the same location as
|
||||
.I libpng
|
||||
or at
|
||||
http://www.libpng.org/pub/png/libpng.html (canonical home page)
|
||||
.br
|
||||
https://zlib.net/
|
||||
|
||||
https://github.com/pnggroup/libpng (canonical Git repository)
|
||||
.br
|
||||
https://libpng.sourceforge.io (downloadable archives)
|
||||
.LP
|
||||
.IR PNG specification: RFC 2083
|
||||
.B zlib
|
||||
.IP
|
||||
(generally) at the same location as
|
||||
.I libpng
|
||||
or at
|
||||
https://zlib.net (canonical home page)
|
||||
.br
|
||||
https://www.ietf.org/rfc/rfc2083.txt
|
||||
https://github.com/madler/zlib (canonical Git repository)
|
||||
.br
|
||||
or (as a W3C Recommendation) at
|
||||
.br
|
||||
https://www.w3.org/TR/REC-png.html
|
||||
|
||||
A copy of zlib may also be found at the same location as libpng.
|
||||
.LP
|
||||
In the case of any inconsistency between the PNG specification
|
||||
and this library, the specification takes precedence.
|
||||
@ -6043,10 +6033,10 @@ Libpng:
|
||||
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
|
||||
Maintained by Cosmin Truta.
|
||||
|
||||
Supported by the PNG development group
|
||||
Supported by the PNG development group.
|
||||
.br
|
||||
png-mng-implement at lists.sourceforge.net (subscription required; visit
|
||||
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
|
||||
to subscribe).
|
||||
png-mng-implement at lists.sourceforge.net. (Subscription is required;
|
||||
visit https://lists.sourceforge.net/lists/listinfo/png-mng-implement
|
||||
to subscribe.)
|
||||
|
||||
.\" end of man page
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
.TH LIBPNGPF 3 "April 14, 2019"
|
||||
.TH LIBPNGPF 3 "June 21, 2023"
|
||||
.SH NAME
|
||||
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.37
|
||||
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.40
|
||||
(private functions)
|
||||
|
||||
.SH SYNOPSIS
|
||||
|
||||
35
png/png.5
35
png/png.5
@ -1,4 +1,4 @@
|
||||
.TH PNG 5 "April 14, 2019"
|
||||
.TH PNG 5 "June 21, 2023"
|
||||
.SH NAME
|
||||
png \- Portable Network Graphics (PNG) format
|
||||
|
||||
@ -18,7 +18,7 @@ Also, PNG can store gamma and chromaticity data for improved color
|
||||
matching on heterogeneous platforms.
|
||||
|
||||
.SH "SEE ALSO"
|
||||
.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
|
||||
.BR "libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
|
||||
.LP
|
||||
PNG Specification (Second Edition), November 2003:
|
||||
.IP
|
||||
@ -43,7 +43,7 @@ or W3C Recommendation
|
||||
https://www.w3.org/TR/REC-png-961001
|
||||
|
||||
.SH AUTHORS
|
||||
This man page: Cosmin Truta, Glenn Randers-Pehrson
|
||||
This man page: Glenn Randers-Pehrson, Cosmin Truta
|
||||
.LP
|
||||
Portable Network Graphics (PNG) Specification (Second Edition)
|
||||
Information technology - Computer graphics and image processing -
|
||||
@ -51,34 +51,9 @@ Portable Network Graphics (PNG): Functional specification.
|
||||
ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others.
|
||||
.LP
|
||||
Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999):
|
||||
Glenn Randers-Pehrson and others (png-list).
|
||||
Glenn Randers-Pehrson and others.
|
||||
.LP
|
||||
Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996):
|
||||
Thomas Boutell and others (png-list).
|
||||
Thomas Boutell and others.
|
||||
|
||||
.SH COPYRIGHT
|
||||
.LP
|
||||
This man page is
|
||||
.br
|
||||
Copyright (c) 2018-2019 Cosmin Truta.
|
||||
.br
|
||||
Copyright (c) 1998-2006 Glenn Randers-Pehrson.
|
||||
.br
|
||||
See png.h for conditions of use and distribution.
|
||||
.LP
|
||||
The PNG Specification (Second Edition) is
|
||||
.br
|
||||
Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved.
|
||||
.LP
|
||||
The PNG-1.2 Specification is
|
||||
.br
|
||||
Copyright (c) 1999 Glenn Randers-Pehrson.
|
||||
.br
|
||||
See the specification for conditions of use and distribution.
|
||||
.LP
|
||||
The PNG-1.0 Specification is
|
||||
.br
|
||||
Copyright (c) 1996 Massachusetts Institute of Technology.
|
||||
.br
|
||||
See the specification for conditions of use and distribution.
|
||||
.\" end of man page
|
||||
|
||||
@ -1,9 +1,9 @@
|
||||
|
||||
/* pngconf.h - machine-configurable file for libpng
|
||||
*
|
||||
* libpng version 1.6.37
|
||||
* libpng version 1.6.40
|
||||
*
|
||||
* Copyright (c) 2018-2019 Cosmin Truta
|
||||
* Copyright (c) 2018-2022 Cosmin Truta
|
||||
* Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson
|
||||
* Copyright (c) 1996-1997 Andreas Dilger
|
||||
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
@ -180,8 +180,8 @@
|
||||
* compiler-specific macros to the values required to change the calling
|
||||
* conventions of the various functions.
|
||||
*/
|
||||
#if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
|
||||
defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
|
||||
#if defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
|
||||
defined(__CYGWIN__)
|
||||
/* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
|
||||
* MinGW on any architecture currently supported by Windows. Also includes
|
||||
* Watcom builds but these need special treatment because they are not
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
|
||||
/* pngpriv.h - private declarations for use inside libpng
|
||||
*
|
||||
* Copyright (c) 2018-2019 Cosmin Truta
|
||||
* Copyright (c) 2018-2023 Cosmin Truta
|
||||
* 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.
|
||||
@ -174,7 +174,7 @@
|
||||
# else /* !defined __ARM_NEON__ */
|
||||
/* The 'intrinsics' code simply won't compile without this -mfpu=neon:
|
||||
*/
|
||||
# if !defined(__aarch64__)
|
||||
# if !defined(__aarch64__) && !defined(_M_ARM64)
|
||||
/* The assembler code currently does not work on ARM64 */
|
||||
# define PNG_ARM_NEON_IMPLEMENTATION 2
|
||||
# endif /* __aarch64__ */
|
||||
@ -185,6 +185,8 @@
|
||||
/* Use the intrinsics code by default. */
|
||||
# define PNG_ARM_NEON_IMPLEMENTATION 1
|
||||
# endif
|
||||
#else /* PNG_ARM_NEON_OPT == 0 */
|
||||
# define PNG_ARM_NEON_IMPLEMENTATION 0
|
||||
#endif /* PNG_ARM_NEON_OPT > 0 */
|
||||
|
||||
#ifndef PNG_MIPS_MSA_OPT
|
||||
@ -263,11 +265,15 @@
|
||||
# ifndef PNG_MIPS_MSA_IMPLEMENTATION
|
||||
# define PNG_MIPS_MSA_IMPLEMENTATION 1
|
||||
# endif
|
||||
#else
|
||||
# define PNG_MIPS_MSA_IMPLEMENTATION 0
|
||||
#endif /* PNG_MIPS_MSA_OPT > 0 */
|
||||
|
||||
#if PNG_POWERPC_VSX_OPT > 0
|
||||
# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_vsx
|
||||
# define PNG_POWERPC_VSX_IMPLEMENTATION 1
|
||||
#else
|
||||
# define PNG_POWERPC_VSX_IMPLEMENTATION 0
|
||||
#endif
|
||||
|
||||
|
||||
@ -492,16 +498,7 @@
|
||||
static_cast<type>(static_cast<const void*>(value))
|
||||
#else
|
||||
# define png_voidcast(type, value) (value)
|
||||
# ifdef _WIN64
|
||||
# ifdef __GNUC__
|
||||
typedef unsigned long long png_ptruint;
|
||||
# else
|
||||
typedef unsigned __int64 png_ptruint;
|
||||
# endif
|
||||
# else
|
||||
typedef unsigned long png_ptruint;
|
||||
# endif
|
||||
# define png_constcast(type, value) ((type)(png_ptruint)(const void*)(value))
|
||||
# define png_constcast(type, value) ((type)(void*)(const void*)(value))
|
||||
# define png_aligncast(type, value) ((void*)(value))
|
||||
# define png_aligncastconst(type, value) ((const void*)(value))
|
||||
#endif /* __cplusplus */
|
||||
@ -543,9 +540,8 @@
|
||||
# include <alloc.h>
|
||||
#endif
|
||||
|
||||
#if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \
|
||||
defined(_WIN32) || defined(__WIN32__)
|
||||
# include <windows.h> /* defines _WINDOWS_ macro */
|
||||
#if defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
|
||||
# include <windows.h>
|
||||
#endif
|
||||
#endif /* PNG_VERSION_INFO_ONLY */
|
||||
|
||||
@ -554,13 +550,9 @@
|
||||
* functions that are passed far data must be model-independent.
|
||||
*/
|
||||
|
||||
/* Memory model/platform independent fns */
|
||||
/* Platform-independent functions */
|
||||
#ifndef PNG_ABORT
|
||||
# ifdef _WINDOWS_
|
||||
# define PNG_ABORT() ExitProcess(0)
|
||||
# else
|
||||
# define PNG_ABORT() abort()
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* These macros may need to be architecture dependent. */
|
||||
@ -585,26 +577,25 @@
|
||||
/* This is used because in some compiler implementations non-aligned
|
||||
* structure members are supported, so the offsetof approach below fails.
|
||||
* Set PNG_ALIGN_SIZE=0 for compiler combinations where unaligned access
|
||||
* is good for performance. Do not do this unless you have tested the result
|
||||
* and understand it.
|
||||
* is good for performance. Do not do this unless you have tested the
|
||||
* result and understand it.
|
||||
*/
|
||||
# define png_alignof(type) (sizeof (type))
|
||||
# define png_alignof(type) (sizeof(type))
|
||||
#else
|
||||
# if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET
|
||||
# define png_alignof(type) offsetof(struct{char c; type t;}, t)
|
||||
# else
|
||||
# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS
|
||||
# define png_alignof(type) (1)
|
||||
# define png_alignof(type) 1
|
||||
# endif
|
||||
/* Else leave png_alignof undefined to prevent use thereof */
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* This implicitly assumes alignment is always to a power of 2. */
|
||||
/* This implicitly assumes alignment is always a multiple of 2. */
|
||||
#ifdef png_alignof
|
||||
# define png_isaligned(ptr, type)\
|
||||
(((type)((const char*)ptr-(const char*)0) & \
|
||||
(type)(png_alignof(type)-1)) == 0)
|
||||
# define png_isaligned(ptr, type) \
|
||||
(((type)(size_t)((const void*)(ptr)) & (type)(png_alignof(type)-1)) == 0)
|
||||
#else
|
||||
# define png_isaligned(ptr, type) 0
|
||||
#endif
|
||||
@ -635,7 +626,7 @@
|
||||
#define PNG_BACKGROUND_IS_GRAY 0x800U
|
||||
#define PNG_HAVE_PNG_SIGNATURE 0x1000U
|
||||
#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000U /* Have another chunk after IDAT */
|
||||
/* 0x4000U (unused) */
|
||||
#define PNG_WROTE_eXIf 0x4000U
|
||||
#define PNG_IS_READ_STRUCT 0x8000U /* Else is a write struct */
|
||||
|
||||
/* Flags for the transformations the PNG library does on the image data */
|
||||
@ -1919,7 +1910,7 @@ PNG_INTERNAL_FUNCTION(void,png_ascii_from_fixed,(png_const_structrp png_ptr,
|
||||
*/
|
||||
#define PNG_FP_INVALID 512 /* Available for callers as a distinct value */
|
||||
|
||||
/* Result codes for the parser (boolean - true meants ok, false means
|
||||
/* Result codes for the parser (boolean - true means ok, false means
|
||||
* not ok yet.)
|
||||
*/
|
||||
#define PNG_FP_MAYBE 0 /* The number may be valid in the future */
|
||||
@ -1955,7 +1946,7 @@ PNG_INTERNAL_FUNCTION(void,png_ascii_from_fixed,(png_const_structrp png_ptr,
|
||||
* the problem character.) This has not been tested within libpng.
|
||||
*/
|
||||
PNG_INTERNAL_FUNCTION(int,png_check_fp_number,(png_const_charp string,
|
||||
size_t size, int *statep, png_size_tp whereami),PNG_EMPTY);
|
||||
size_t size, int *statep, size_t *whereami),PNG_EMPTY);
|
||||
|
||||
/* This is the same but it checks a complete string and returns true
|
||||
* only if it just contains a floating point number. As of 1.5.4 this
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
|
||||
/* pngstruct.h - header file for PNG reference library
|
||||
*
|
||||
* Copyright (c) 2018-2019 Cosmin Truta
|
||||
* Copyright (c) 2018-2022 Cosmin Truta
|
||||
* 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.
|
||||
@ -334,18 +334,8 @@ struct png_struct_def
|
||||
size_t current_buffer_size; /* amount of data now in current_buffer */
|
||||
int process_mode; /* what push library is currently doing */
|
||||
int cur_palette; /* current push library palette index */
|
||||
|
||||
#endif /* PROGRESSIVE_READ */
|
||||
|
||||
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
|
||||
/* For the Borland special 64K segment handler */
|
||||
png_bytepp offset_table_ptr;
|
||||
png_bytep offset_table;
|
||||
png_uint_16 offset_table_number;
|
||||
png_uint_16 offset_table_count;
|
||||
png_uint_16 offset_table_count_free;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_READ_QUANTIZE_SUPPORTED
|
||||
png_bytep palette_lookup; /* lookup table for quantizing */
|
||||
png_bytep quantize_index; /* index translation for palette files */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user