forked from KolibriOS/kolibrios
delete libraries/libpng
git-svn-id: svn://kolibrios.org@4353 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
parent
bea56faf86
commit
ca0ff73f27
@ -1,111 +0,0 @@
|
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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.
|
||||
|
||||
COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
|
||||
|
||||
If you modify libpng you may insert additional notices immediately following
|
||||
this sentence.
|
||||
|
||||
This code is released under the libpng license.
|
||||
|
||||
libpng versions 1.2.6, August 15, 2004, through 1.5.1, February 3, 2011, are
|
||||
Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
|
||||
distributed according to the same disclaimer and license as libpng-1.2.5
|
||||
with the following individual added to the list of Contributing Authors
|
||||
|
||||
Cosmin Truta
|
||||
|
||||
libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
|
||||
Copyright (c) 2000-2002 Glenn Randers-Pehrson, 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
|
||||
Gilles Vollant
|
||||
|
||||
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.
|
||||
|
||||
libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
|
||||
Copyright (c) 1998, 1999 Glenn Randers-Pehrson, 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:
|
||||
|
||||
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
|
||||
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
|
||||
|
||||
libpng versions 0.5, May 1995, through 0.88, January 1996, are
|
||||
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
|
||||
|
||||
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.
|
||||
|
||||
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.
|
||||
|
||||
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.
|
||||
|
||||
|
||||
A "png_get_copyright" function is available, for convenient use in "about"
|
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boxes and the like:
|
||||
|
||||
printf("%s",png_get_copyright(NULL));
|
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|
||||
Also, the PNG logo (in PNG format, of course) is supplied in the
|
||||
files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
|
||||
|
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Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
|
||||
certification mark of the Open Source Initiative.
|
||||
|
||||
Glenn Randers-Pehrson
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||||
glennrp at users.sourceforge.net
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February 3, 2011
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@ -1,62 +0,0 @@
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LIBRARY= libpng16
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CC=gcc
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CFLAGS = -U_Win32 -U_WIN32 -U__MINGW32__ -c -O2 -fomit-frame-pointer
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|
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LD = ld
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AR= ar
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|
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STRIP = $(PREFIX)strip
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LDFLAGS:= -shared -s -nostdlib -T ../newlib/dll.lds --entry _DllStartup --image-base=0 --out-implib libpng.dll.a
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|
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INCLUDES= -I. -I../newlib/include -I../zlib
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|
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LIBPATH:= -L../newlib -L../zlib
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||||
|
||||
LIBS:= -ldll -lc.dll -lz.dll
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|
||||
DEFS = -DHAVE_CONFIG_H
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|
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LIBPNG_DEFINES = -DPNG_CONFIGURE_LIBPNG
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DEFINES= $(DEFS) $(LIBPNG_DEFINES)
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|
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SOURCES = png.c pngerror.c pngget.c pngmem.c pngpread.c \
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pngread.c pngrio.c pngrtran.c pngrutil.c \
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pngset.c pngtrans.c pngwio.c pngwrite.c \
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pngwtran.c pngwutil.c
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OBJECTS = $(patsubst %.c, %.o, $(SOURCES))
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|
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# targets
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all:$(LIBRARY).a $(LIBRARY).dll
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$(LIBRARY).a: $(OBJECTS) Makefile
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ar cvrs $(LIBRARY).a $(OBJECTS)
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|
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$(LIBRARY).dll: libpng16.def $(OBJECTS) Makefile
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$(LD) $(LDFLAGS) $(LIBPATH) -o $@ libpng16.def $(OBJECTS) $(LIBS)
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$(STRIP) $@
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sed -f ../newlib/cmd1.sed libpng16.def > mem
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sed -f ../newlib/cmd2.sed mem >libpng.inc
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|
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%.o : %.c Makefile
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$(CC) $(CFLAGS) $(DEFINES) $(INCLUDES) -o $@ $<
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clean:
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||||
-rm -f *.o
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|
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|
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@ -1,202 +0,0 @@
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README for libpng version 1.6.5 - September 14, 2013 (shared library 16.0)
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See the note about version numbers near the top of png.h
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See INSTALL for instructions on how to install libpng.
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|
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Libpng comes in several distribution formats. Get libpng-*.tar.gz or
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libpng-*.tar.xz or if you want UNIX-style line endings in the text files,
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or lpng*.7z or lpng*.zip if you want DOS-style line endings.
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|
||||
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
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||||
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.
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||||
|
||||
****
|
||||
Note that some of the changes to the png_info structure render this
|
||||
version of the library binary incompatible with libpng-0.89 or
|
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earlier versions if you are using a shared library. The type of the
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"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 png_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
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||||
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 do not make current programs
|
||||
that access the info struct directly incompatible with the new
|
||||
library. However, 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.
|
||||
****
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||||
|
||||
Additions since 0.90 include the ability to compile libpng as a
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Windows DLL, and new APIs for accessing data in the info struct.
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||||
Experimental functions include the ability to set weighting and cost
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||||
factors for row filter selection, direct reads of integers from buffers
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||||
on big-endian processors that support misaligned data access, faster
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||||
methods of doing alpha composition, and more accurate 16->8 bit color
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||||
conversion.
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|
||||
The additions since 0.89 include the ability to read from a PNG stream
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||||
which has had some (or all) of the signature bytes read by the calling
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application. This also allows the reading of embedded PNG streams that
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||||
do not have the PNG file signature. As well, it is now possible to set
|
||||
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
|
||||
|
||||
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 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.
|
||||
|
||||
zlib should be available at the same place that libpng is, or at 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/documents/
|
||||
|
||||
This code is currently being archived at libpng.sf.net in the
|
||||
[DOWNLOAD] area, and at ftp://ftp.simplesystems.org. If you can't find it
|
||||
in any of those places, e-mail me, and I'll help you find it.
|
||||
|
||||
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
|
||||
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) or to glennrp at users.sourceforge.net
|
||||
|
||||
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
|
||||
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 eighteen 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.
|
||||
|
||||
Files in this distribution:
|
||||
|
||||
ANNOUNCE => Announcement of this version, with recent changes
|
||||
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
|
||||
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
|
||||
libpngpf.3 => manual page for libpng's private functions
|
||||
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)
|
||||
pngconf.h => System specific library configuration (public)
|
||||
pngstruct.h => png_struct declaration (private)
|
||||
pnginfo.h => png_info struct declaration (private)
|
||||
pngdebug.h => debugging macros (private)
|
||||
pngerror.c => Error/warning message I/O functions
|
||||
pngget.c => Functions for retrieving info from struct
|
||||
pngmem.c => Memory handling functions
|
||||
pngbar.png => PNG logo, 88x31
|
||||
pngnow.png => PNG logo, 98x31
|
||||
pngpread.c => Progressive reading functions
|
||||
pngread.c => Read data/helper high-level functions
|
||||
pngrio.c => Lowest-level data read I/O functions
|
||||
pngrtran.c => Read data transformation functions
|
||||
pngrutil.c => Read data utility functions
|
||||
pngset.c => Functions for storing data into the info_struct
|
||||
pngtest.c => Library test program
|
||||
pngtest.png => Library test sample image
|
||||
pngtrans.c => Common data transformation functions
|
||||
pngwio.c => Lowest-level write I/O functions
|
||||
pngwrite.c => High-level write functions
|
||||
pngwtran.c => Write data transformations
|
||||
pngwutil.c => Write utility functions
|
||||
arm => Contains optimized code for the ARM platform
|
||||
contrib => Contributions
|
||||
examples => Example programs
|
||||
gregbook => source code for PNG reading and writing, from
|
||||
Greg Roelofs' "PNG: The Definitive Guide",
|
||||
O'Reilly, 1999
|
||||
libtests => Test programs
|
||||
pngminim => Minimal decoder, encoder, and progressive decoder
|
||||
programs demonstrating use of pngusr.dfa
|
||||
pngminus => Simple pnm2png and png2pnm programs
|
||||
pngsuite => Test images
|
||||
tools => Various tools
|
||||
visupng => Contains a MSVC workspace for VisualPng
|
||||
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)
|
||||
|
||||
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
|
||||
@ -1,110 +0,0 @@
|
||||
/* config.h. Generated from config.h.in by configure. */
|
||||
/* config.h.in. Generated from configure.ac by autoheader. */
|
||||
|
||||
/* Define to 1 if you have the <dlfcn.h> header file. */
|
||||
/* #undef HAVE_DLFCN_H */
|
||||
|
||||
/* Define to 1 if you have the `feenableexcept' function. */
|
||||
/* #undef HAVE_FEENABLEEXCEPT */
|
||||
|
||||
/* Define to 1 if you have the <inttypes.h> header file. */
|
||||
#define HAVE_INTTYPES_H 1
|
||||
|
||||
/* Define to 1 if you have the `m' library (-lm). */
|
||||
/* #undef HAVE_LIBM */
|
||||
|
||||
/* Define to 1 if you have the `z' library (-lz). */
|
||||
#define HAVE_LIBZ 1
|
||||
|
||||
/* Define to 1 if you have the <memory.h> header file. */
|
||||
#define HAVE_MEMORY_H 1
|
||||
|
||||
/* Define to 1 if you have the `memset' function. */
|
||||
#define HAVE_MEMSET 1
|
||||
|
||||
/* Define to 1 if you have the `pow' function. */
|
||||
#define HAVE_POW 1
|
||||
|
||||
/* Define to 1 if you have the <stdint.h> header file. */
|
||||
#define HAVE_STDINT_H 1
|
||||
|
||||
/* Define to 1 if you have the <stdlib.h> header file. */
|
||||
#define HAVE_STDLIB_H 1
|
||||
|
||||
/* Define to 1 if you have the <strings.h> header file. */
|
||||
#define HAVE_STRINGS_H 1
|
||||
|
||||
/* Define to 1 if you have the <string.h> header file. */
|
||||
#define HAVE_STRING_H 1
|
||||
|
||||
/* Define to 1 if you have the <sys/stat.h> header file. */
|
||||
#define HAVE_SYS_STAT_H 1
|
||||
|
||||
/* Define to 1 if you have the <sys/types.h> header file. */
|
||||
#define HAVE_SYS_TYPES_H 1
|
||||
|
||||
/* Define to 1 if you have the <unistd.h> header file. */
|
||||
#define HAVE_UNISTD_H 1
|
||||
|
||||
/* Define to the sub-directory in which libtool stores uninstalled libraries.
|
||||
*/
|
||||
#define LT_OBJDIR ".libs/"
|
||||
|
||||
/* Name of package */
|
||||
#define PACKAGE "libpng"
|
||||
|
||||
/* Define to the address where bug reports for this package should be sent. */
|
||||
#define PACKAGE_BUGREPORT "png-mng-implement@lists.sourceforge.net"
|
||||
|
||||
/* Define to the full name of this package. */
|
||||
#define PACKAGE_NAME "libpng"
|
||||
|
||||
/* Define to the full name and version of this package. */
|
||||
#define PACKAGE_STRING "libpng 1.6.5"
|
||||
|
||||
/* Define to the one symbol short name of this package. */
|
||||
#define PACKAGE_TARNAME "libpng"
|
||||
|
||||
/* Define to the home page for this package. */
|
||||
#define PACKAGE_URL ""
|
||||
|
||||
/* Define to the version of this package. */
|
||||
#define PACKAGE_VERSION "1.6.5"
|
||||
|
||||
/* Turn on ARM Neon optimizations at run-time */
|
||||
/* #undef PNG_ARM_NEON_API_SUPPORTED */
|
||||
|
||||
/* Check for ARM Neon support at run-time */
|
||||
/* #undef PNG_ARM_NEON_CHECK_SUPPORTED */
|
||||
|
||||
/* Enable ARM Neon optimizations */
|
||||
/* #undef PNG_ARM_NEON_OPT */
|
||||
|
||||
/* Define to 1 if you have the ANSI C header files. */
|
||||
#define STDC_HEADERS 1
|
||||
|
||||
/* Define to 1 if your <sys/time.h> declares `struct tm'. */
|
||||
/* #undef TM_IN_SYS_TIME */
|
||||
|
||||
/* Version number of package */
|
||||
#define VERSION "1.6.5"
|
||||
|
||||
/* Define to empty if `const' does not conform to ANSI C. */
|
||||
/* #undef const */
|
||||
|
||||
/* Define to the equivalent of the C99 'restrict' keyword, or to
|
||||
nothing if this is not supported. Do not define if restrict is
|
||||
supported directly. */
|
||||
#define restrict __restrict
|
||||
/* Work around a bug in Sun C++: it does not support _Restrict or
|
||||
__restrict__, even though the corresponding Sun C compiler ends up with
|
||||
"#define restrict _Restrict" or "#define restrict __restrict__" in the
|
||||
previous line. Perhaps some future version of Sun C++ will work with
|
||||
restrict; if so, hopefully it defines __RESTRICT like Sun C does. */
|
||||
#if defined __SUNPRO_CC && !defined __RESTRICT
|
||||
# define _Restrict
|
||||
# define __restrict__
|
||||
#endif
|
||||
|
||||
/* Define to `unsigned int' if <sys/types.h> does not define. */
|
||||
/* #undef size_t */
|
||||
File diff suppressed because it is too large
Load Diff
@ -1,242 +0,0 @@
|
||||
EXPORTS
|
||||
png_access_version_number
|
||||
png_set_sig_bytes
|
||||
png_sig_cmp
|
||||
png_create_read_struct
|
||||
png_create_write_struct
|
||||
png_get_compression_buffer_size
|
||||
png_set_compression_buffer_size
|
||||
png_set_longjmp_fn
|
||||
png_longjmp
|
||||
png_reset_zstream
|
||||
png_create_read_struct_2
|
||||
png_create_write_struct_2
|
||||
png_write_sig
|
||||
png_write_chunk
|
||||
png_write_chunk_start
|
||||
png_write_chunk_data
|
||||
png_write_chunk_end
|
||||
png_create_info_struct
|
||||
png_info_init_3
|
||||
png_write_info_before_PLTE
|
||||
png_write_info
|
||||
png_read_info
|
||||
png_convert_to_rfc1123
|
||||
png_convert_to_rfc1123_buffer
|
||||
png_convert_from_struct_tm
|
||||
png_convert_from_time_t
|
||||
png_set_expand
|
||||
png_set_expand_gray_1_2_4_to_8
|
||||
png_set_palette_to_rgb
|
||||
png_set_tRNS_to_alpha
|
||||
png_set_expand_16
|
||||
png_set_bgr
|
||||
png_set_gray_to_rgb
|
||||
png_set_rgb_to_gray
|
||||
png_set_rgb_to_gray_fixed
|
||||
png_get_rgb_to_gray_status
|
||||
png_build_grayscale_palette
|
||||
png_set_alpha_mode
|
||||
png_set_alpha_mode_fixed
|
||||
png_set_strip_alpha
|
||||
png_set_swap_alpha
|
||||
png_set_invert_alpha
|
||||
png_set_filler
|
||||
png_set_add_alpha
|
||||
png_set_swap
|
||||
png_set_packing
|
||||
png_set_packswap
|
||||
png_set_shift
|
||||
png_set_interlace_handling
|
||||
png_set_invert_mono
|
||||
png_set_background
|
||||
png_set_background_fixed
|
||||
png_set_scale_16
|
||||
png_set_strip_16
|
||||
png_set_quantize
|
||||
png_set_gamma
|
||||
png_set_gamma_fixed
|
||||
png_set_flush
|
||||
png_write_flush
|
||||
png_start_read_image
|
||||
png_read_update_info
|
||||
png_read_rows
|
||||
png_read_row
|
||||
png_read_image
|
||||
png_write_row
|
||||
png_write_rows
|
||||
png_write_image
|
||||
png_write_end
|
||||
png_read_end
|
||||
png_destroy_info_struct
|
||||
png_destroy_read_struct
|
||||
png_destroy_write_struct
|
||||
png_set_crc_action
|
||||
png_set_filter
|
||||
png_set_filter_heuristics
|
||||
png_set_filter_heuristics_fixed
|
||||
png_set_compression_level
|
||||
png_set_compression_mem_level
|
||||
png_set_compression_strategy
|
||||
png_set_compression_window_bits
|
||||
png_set_compression_method
|
||||
png_set_text_compression_level
|
||||
png_set_text_compression_mem_level
|
||||
png_set_text_compression_strategy
|
||||
png_set_text_compression_window_bits
|
||||
png_set_text_compression_method
|
||||
png_init_io
|
||||
png_set_error_fn
|
||||
png_get_error_ptr
|
||||
png_set_write_fn
|
||||
png_set_read_fn
|
||||
png_get_io_ptr
|
||||
png_set_read_status_fn
|
||||
png_set_write_status_fn
|
||||
png_set_mem_fn
|
||||
png_get_mem_ptr
|
||||
png_set_read_user_transform_fn
|
||||
png_set_write_user_transform_fn
|
||||
png_set_user_transform_info
|
||||
png_get_user_transform_ptr
|
||||
png_get_current_row_number
|
||||
png_get_current_pass_number
|
||||
png_set_read_user_chunk_fn
|
||||
png_get_user_chunk_ptr
|
||||
png_set_progressive_read_fn
|
||||
png_get_progressive_ptr
|
||||
png_process_data
|
||||
png_process_data_pause
|
||||
png_process_data_skip
|
||||
png_progressive_combine_row
|
||||
png_malloc
|
||||
png_calloc
|
||||
png_malloc_warn
|
||||
png_free
|
||||
png_free_data
|
||||
png_data_freer
|
||||
png_malloc_default
|
||||
png_free_default
|
||||
png_error
|
||||
png_chunk_error
|
||||
png_warning
|
||||
png_chunk_warning
|
||||
png_benign_error
|
||||
png_chunk_benign_error
|
||||
png_set_benign_errors
|
||||
png_get_valid
|
||||
png_get_rowbytes
|
||||
png_get_rows
|
||||
png_set_rows
|
||||
png_get_channels
|
||||
png_get_image_width
|
||||
png_get_image_height
|
||||
png_get_bit_depth
|
||||
png_get_color_type
|
||||
png_get_filter_type
|
||||
png_get_interlace_type
|
||||
png_get_compression_type
|
||||
png_get_pixels_per_meter
|
||||
png_get_x_pixels_per_meter
|
||||
png_get_y_pixels_per_meter
|
||||
png_get_pixel_aspect_ratio
|
||||
png_get_pixel_aspect_ratio_fixed
|
||||
png_get_x_offset_pixels
|
||||
png_get_y_offset_pixels
|
||||
png_get_x_offset_microns
|
||||
png_get_y_offset_microns
|
||||
png_get_signature
|
||||
png_get_bKGD
|
||||
png_set_bKGD
|
||||
png_get_cHRM
|
||||
png_get_cHRM_XYZ
|
||||
png_get_cHRM_fixed
|
||||
png_get_cHRM_XYZ_fixed
|
||||
png_set_cHRM
|
||||
png_set_cHRM_XYZ
|
||||
png_set_cHRM_fixed
|
||||
png_set_cHRM_XYZ_fixed
|
||||
png_get_gAMA
|
||||
png_get_gAMA_fixed
|
||||
png_set_gAMA
|
||||
png_set_gAMA_fixed
|
||||
png_get_hIST
|
||||
png_set_hIST
|
||||
png_get_IHDR
|
||||
png_set_IHDR
|
||||
png_get_oFFs
|
||||
png_set_oFFs
|
||||
png_get_pCAL
|
||||
png_set_pCAL
|
||||
png_get_pHYs
|
||||
png_set_pHYs
|
||||
png_get_PLTE
|
||||
png_set_PLTE
|
||||
png_get_sBIT
|
||||
png_set_sBIT
|
||||
png_get_sRGB
|
||||
png_set_sRGB
|
||||
png_set_sRGB_gAMA_and_cHRM
|
||||
png_get_iCCP
|
||||
png_set_iCCP
|
||||
png_get_sPLT
|
||||
png_set_sPLT
|
||||
png_get_text
|
||||
png_set_text
|
||||
png_get_tIME
|
||||
png_set_tIME
|
||||
png_get_tRNS
|
||||
png_set_tRNS
|
||||
png_get_sCAL
|
||||
png_get_sCAL_fixed
|
||||
png_get_sCAL_s
|
||||
png_set_sCAL
|
||||
png_set_sCAL_fixed
|
||||
png_set_sCAL_s
|
||||
png_set_keep_unknown_chunks
|
||||
png_handle_as_unknown
|
||||
png_set_unknown_chunks
|
||||
png_set_unknown_chunk_location
|
||||
png_get_unknown_chunks
|
||||
png_set_invalid
|
||||
png_read_png
|
||||
png_write_png
|
||||
png_get_copyright
|
||||
png_get_header_ver
|
||||
png_get_header_version
|
||||
png_get_libpng_ver
|
||||
png_permit_mng_features
|
||||
png_set_user_limits
|
||||
png_get_user_width_max
|
||||
png_get_user_height_max
|
||||
png_set_chunk_cache_max
|
||||
png_get_chunk_cache_max
|
||||
png_set_chunk_malloc_max
|
||||
png_get_chunk_malloc_max
|
||||
png_get_pixels_per_inch
|
||||
png_get_x_pixels_per_inch
|
||||
png_get_y_pixels_per_inch
|
||||
png_get_x_offset_inches
|
||||
png_get_x_offset_inches_fixed
|
||||
png_get_y_offset_inches
|
||||
png_get_y_offset_inches_fixed
|
||||
png_get_pHYs_dpi
|
||||
png_get_io_state
|
||||
png_get_io_chunk_type
|
||||
png_get_uint_32
|
||||
png_get_uint_16
|
||||
png_get_int_32
|
||||
png_get_uint_31
|
||||
png_save_uint_32
|
||||
png_save_int_32
|
||||
png_save_uint_16
|
||||
png_image_begin_read_from_file
|
||||
png_image_begin_read_from_stdio
|
||||
png_image_begin_read_from_memory
|
||||
png_image_finish_read
|
||||
png_image_free
|
||||
png_image_write_to_file
|
||||
png_image_write_to_stdio
|
||||
png_set_check_for_invalid_index
|
||||
png_get_palette_max
|
||||
png_set_option
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@ -1,617 +0,0 @@
|
||||
|
||||
/* pngconf.h - machine configurable file for libpng
|
||||
*
|
||||
* libpng version 1.6.5 - September 14, 2013
|
||||
*
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*
|
||||
*/
|
||||
|
||||
/* Any machine specific code is near the front of this file, so if you
|
||||
* are configuring libpng for a machine, you may want to read the section
|
||||
* starting here down to where it starts to typedef png_color, png_text,
|
||||
* and png_info.
|
||||
*/
|
||||
|
||||
#ifndef PNGCONF_H
|
||||
#define PNGCONF_H
|
||||
|
||||
/* To do: Do all of this in scripts/pnglibconf.dfa */
|
||||
#ifdef PNG_SAFE_LIMITS_SUPPORTED
|
||||
# ifdef PNG_USER_WIDTH_MAX
|
||||
# undef PNG_USER_WIDTH_MAX
|
||||
# define PNG_USER_WIDTH_MAX 1000000L
|
||||
# endif
|
||||
# ifdef PNG_USER_HEIGHT_MAX
|
||||
# undef PNG_USER_HEIGHT_MAX
|
||||
# define PNG_USER_HEIGHT_MAX 1000000L
|
||||
# endif
|
||||
# ifdef PNG_USER_CHUNK_MALLOC_MAX
|
||||
# undef PNG_USER_CHUNK_MALLOC_MAX
|
||||
# define PNG_USER_CHUNK_MALLOC_MAX 4000000L
|
||||
# endif
|
||||
# ifdef PNG_USER_CHUNK_CACHE_MAX
|
||||
# undef PNG_USER_CHUNK_CACHE_MAX
|
||||
# define PNG_USER_CHUNK_CACHE_MAX 128
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
|
||||
|
||||
/* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
|
||||
* compiler for correct compilation. The following header files are required by
|
||||
* the standard. If your compiler doesn't provide these header files, or they
|
||||
* do not match the standard, you will need to provide/improve them.
|
||||
*/
|
||||
#include <limits.h>
|
||||
#include <stddef.h>
|
||||
|
||||
/* Library header files. These header files are all defined by ISOC90; libpng
|
||||
* expects conformant implementations, however, an ISOC90 conformant system need
|
||||
* not provide these header files if the functionality cannot be implemented.
|
||||
* In this case it will be necessary to disable the relevant parts of libpng in
|
||||
* the build of pnglibconf.h.
|
||||
*
|
||||
* Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
|
||||
* include this unnecessary header file.
|
||||
*/
|
||||
|
||||
#ifdef PNG_STDIO_SUPPORTED
|
||||
/* Required for the definition of FILE: */
|
||||
# include <stdio.h>
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
/* Required for the definition of jmp_buf and the declaration of longjmp: */
|
||||
# include <setjmp.h>
|
||||
#endif
|
||||
|
||||
#ifdef PNG_CONVERT_tIME_SUPPORTED
|
||||
/* Required for struct tm: */
|
||||
# include <time.h>
|
||||
#endif
|
||||
|
||||
#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.
|
||||
*/
|
||||
#define PNG_CONST const /* backward compatibility only */
|
||||
|
||||
/* This controls optimization of the reading of 16 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.
|
||||
*/
|
||||
#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
|
||||
# define PNG_USE_READ_MACROS
|
||||
#endif
|
||||
#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
|
||||
# if PNG_DEFAULT_READ_MACROS
|
||||
# define PNG_USE_READ_MACROS
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* COMPILER SPECIFIC OPTIONS.
|
||||
*
|
||||
* These options are provided so that a variety of difficult compilers
|
||||
* can be used. Some are fixed at build time (e.g. PNG_API_RULE
|
||||
* below) but still have compiler specific implementations, others
|
||||
* may be changed on a per-file basis when compiling against libpng.
|
||||
*/
|
||||
|
||||
/* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
|
||||
* against legacy (pre ISOC90) compilers that did not understand function
|
||||
* prototypes. It is not required for modern C compilers.
|
||||
*/
|
||||
#ifndef PNGARG
|
||||
# define PNGARG(arglist) arglist
|
||||
#endif
|
||||
|
||||
/* Function calling conventions.
|
||||
* =============================
|
||||
* Normally it is not necessary to specify to the compiler how to call
|
||||
* a function - it just does it - however on x86 systems derived from
|
||||
* Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
|
||||
* and some others) there are multiple ways to call a function and the
|
||||
* default can be changed on the compiler command line. For this reason
|
||||
* libpng specifies the calling convention of every exported function and
|
||||
* every function called via a user supplied function pointer. This is
|
||||
* done in this file by defining the following macros:
|
||||
*
|
||||
* PNGAPI Calling convention for exported functions.
|
||||
* PNGCBAPI Calling convention for user provided (callback) functions.
|
||||
* PNGCAPI Calling convention used by the ANSI-C library (required
|
||||
* for longjmp callbacks and sometimes used internally to
|
||||
* specify the calling convention for zlib).
|
||||
*
|
||||
* These macros should never be overridden. If it is necessary to
|
||||
* change calling convention in a private build this can be done
|
||||
* by setting PNG_API_RULE (which defaults to 0) to one of the values
|
||||
* below to select the correct 'API' variants.
|
||||
*
|
||||
* PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
|
||||
* This is correct in every known environment.
|
||||
* PNG_API_RULE=1 Use the operating system convention for PNGAPI and
|
||||
* the 'C' calling convention (from PNGCAPI) for
|
||||
* callbacks (PNGCBAPI). This is no longer required
|
||||
* in any known environment - if it has to be used
|
||||
* please post an explanation of the problem to the
|
||||
* libpng mailing list.
|
||||
*
|
||||
* These cases only differ if the operating system does not use the C
|
||||
* calling convention, at present this just means the above cases
|
||||
* (x86 DOS/Windows sytems) and, even then, this does not apply to
|
||||
* Cygwin running on those systems.
|
||||
*
|
||||
* Note that the value must be defined in pnglibconf.h so that what
|
||||
* the application uses to call the library matches the conventions
|
||||
* set when building the library.
|
||||
*/
|
||||
|
||||
/* Symbol export
|
||||
* =============
|
||||
* When building a shared library it is almost always necessary to tell
|
||||
* the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
|
||||
* is used to mark the symbols. On some systems these symbols can be
|
||||
* extracted at link time and need no special processing by the compiler,
|
||||
* on other systems the symbols are flagged by the compiler and just
|
||||
* the declaration requires a special tag applied (unfortunately) in a
|
||||
* compiler dependent way. Some systems can do either.
|
||||
*
|
||||
* A small number of older systems also require a symbol from a DLL to
|
||||
* be flagged to the program that calls it. This is a problem because
|
||||
* we do not know in the header file included by application code that
|
||||
* the symbol will come from a shared library, as opposed to a statically
|
||||
* linked one. For this reason the application must tell us by setting
|
||||
* the magic flag PNG_USE_DLL to turn on the special processing before
|
||||
* it includes png.h.
|
||||
*
|
||||
* Four additional macros are used to make this happen:
|
||||
*
|
||||
* PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
|
||||
* the build or imported if PNG_USE_DLL is set - compiler
|
||||
* and system specific.
|
||||
*
|
||||
* PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
|
||||
* 'type', compiler specific.
|
||||
*
|
||||
* PNG_DLL_EXPORT Set to the magic to use during a libpng build to
|
||||
* make a symbol exported from the DLL. Not used in the
|
||||
* public header files; see pngpriv.h for how it is used
|
||||
* in the libpng build.
|
||||
*
|
||||
* PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
|
||||
* from a DLL - used to define PNG_IMPEXP when
|
||||
* PNG_USE_DLL is set.
|
||||
*/
|
||||
|
||||
/* System specific discovery.
|
||||
* ==========================
|
||||
* This code is used at build time to find PNG_IMPEXP, the API settings
|
||||
* and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
|
||||
* import processing is possible. On Windows systems it also sets
|
||||
* 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__)
|
||||
/* 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
|
||||
* compatible with GCC or Visual C because of different calling conventions.
|
||||
*/
|
||||
# if PNG_API_RULE == 2
|
||||
/* If this line results in an error, either because __watcall is not
|
||||
* understood or because of a redefine just below you cannot use *this*
|
||||
* build of the library with the compiler you are using. *This* build was
|
||||
* build using Watcom and applications must also be built using Watcom!
|
||||
*/
|
||||
# define PNGCAPI __watcall
|
||||
# endif
|
||||
|
||||
# if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
|
||||
# define PNGCAPI __cdecl
|
||||
# if PNG_API_RULE == 1
|
||||
/* If this line results in an error __stdcall is not understood and
|
||||
* PNG_API_RULE should not have been set to '1'.
|
||||
*/
|
||||
# define PNGAPI __stdcall
|
||||
# endif
|
||||
# else
|
||||
/* An older compiler, or one not detected (erroneously) above,
|
||||
* if necessary override on the command line to get the correct
|
||||
* variants for the compiler.
|
||||
*/
|
||||
# ifndef PNGCAPI
|
||||
# define PNGCAPI _cdecl
|
||||
# endif
|
||||
# if PNG_API_RULE == 1 && !defined(PNGAPI)
|
||||
# define PNGAPI _stdcall
|
||||
# endif
|
||||
# endif /* compiler/api */
|
||||
|
||||
/* NOTE: PNGCBAPI always defaults to PNGCAPI. */
|
||||
|
||||
# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
|
||||
# error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
|
||||
# endif
|
||||
|
||||
# if (defined(_MSC_VER) && _MSC_VER < 800) ||\
|
||||
(defined(__BORLANDC__) && __BORLANDC__ < 0x500)
|
||||
/* older Borland and MSC
|
||||
* compilers used '__export' and required this to be after
|
||||
* the type.
|
||||
*/
|
||||
# ifndef PNG_EXPORT_TYPE
|
||||
# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
|
||||
# endif
|
||||
# define PNG_DLL_EXPORT __export
|
||||
# else /* newer compiler */
|
||||
# define PNG_DLL_EXPORT __declspec(dllexport)
|
||||
# ifndef PNG_DLL_IMPORT
|
||||
# define PNG_DLL_IMPORT __declspec(dllimport)
|
||||
# endif
|
||||
# endif /* compiler */
|
||||
|
||||
#else /* !Windows */
|
||||
# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
|
||||
# define PNGAPI _System
|
||||
# else /* !Windows/x86 && !OS/2 */
|
||||
/* Use the defaults, or define PNG*API on the command line (but
|
||||
* this will have to be done for every compile!)
|
||||
*/
|
||||
# endif /* other system, !OS/2 */
|
||||
#endif /* !Windows/x86 */
|
||||
|
||||
/* Now do all the defaulting . */
|
||||
#ifndef PNGCAPI
|
||||
# define PNGCAPI
|
||||
#endif
|
||||
#ifndef PNGCBAPI
|
||||
# define PNGCBAPI PNGCAPI
|
||||
#endif
|
||||
#ifndef PNGAPI
|
||||
# define PNGAPI PNGCAPI
|
||||
#endif
|
||||
|
||||
/* PNG_IMPEXP may be set on the compilation system command line or (if not set)
|
||||
* then in an internal header file when building the library, otherwise (when
|
||||
* using the library) it is set here.
|
||||
*/
|
||||
#ifndef PNG_IMPEXP
|
||||
# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
|
||||
/* This forces use of a DLL, disallowing static linking */
|
||||
# define PNG_IMPEXP PNG_DLL_IMPORT
|
||||
# endif
|
||||
|
||||
# ifndef PNG_IMPEXP
|
||||
# define PNG_IMPEXP
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
|
||||
* 'attributes' as a storage class - the attributes go at the start of the
|
||||
* function definition, and attributes are always appended regardless of the
|
||||
* compiler. This considerably simplifies these macros but may cause problems
|
||||
* if any compilers both need function attributes and fail to handle them as
|
||||
* a storage class (this is unlikely.)
|
||||
*/
|
||||
#ifndef PNG_FUNCTION
|
||||
# define PNG_FUNCTION(type, name, args, attributes) attributes type name args
|
||||
#endif
|
||||
|
||||
#ifndef PNG_EXPORT_TYPE
|
||||
# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
|
||||
#endif
|
||||
|
||||
/* The ordinal value is only relevant when preprocessing png.h for symbol
|
||||
* table entries, so we discard it here. See the .dfn files in the
|
||||
* scripts directory.
|
||||
*/
|
||||
#ifndef PNG_EXPORTA
|
||||
|
||||
# define PNG_EXPORTA(ordinal, type, name, args, attributes)\
|
||||
PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
|
||||
extern attributes)
|
||||
#endif
|
||||
|
||||
/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
|
||||
* so make something non-empty to satisfy the requirement:
|
||||
*/
|
||||
#define PNG_EMPTY /*empty list*/
|
||||
|
||||
#define PNG_EXPORT(ordinal, type, name, args)\
|
||||
PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
|
||||
|
||||
/* Use PNG_REMOVED to comment out a removed interface. */
|
||||
#ifndef PNG_REMOVED
|
||||
# define PNG_REMOVED(ordinal, type, name, args, attributes)
|
||||
#endif
|
||||
|
||||
#ifndef PNG_CALLBACK
|
||||
# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
|
||||
#endif
|
||||
|
||||
/* Support for compiler specific function attributes. These are used
|
||||
* so that where compiler support is available incorrect use of API
|
||||
* functions in png.h will generate compiler warnings.
|
||||
*
|
||||
* Added at libpng-1.2.41.
|
||||
*/
|
||||
|
||||
#ifndef PNG_NO_PEDANTIC_WARNINGS
|
||||
# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
|
||||
# define PNG_PEDANTIC_WARNINGS_SUPPORTED
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
|
||||
/* Support for compiler specific function attributes. These are used
|
||||
* so that where compiler support is available, incorrect use of API
|
||||
* functions in png.h will generate compiler warnings. Added at libpng
|
||||
* version 1.2.41. Disabling these removes the warnings but may also produce
|
||||
* less efficient code.
|
||||
*/
|
||||
# if defined(__GNUC__)
|
||||
# ifndef PNG_USE_RESULT
|
||||
# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
|
||||
# endif
|
||||
# ifndef PNG_NORETURN
|
||||
# define PNG_NORETURN __attribute__((__noreturn__))
|
||||
# endif
|
||||
# if __GNUC__ >= 3
|
||||
# ifndef PNG_ALLOCATED
|
||||
# define PNG_ALLOCATED __attribute__((__malloc__))
|
||||
# endif
|
||||
# ifndef PNG_DEPRECATED
|
||||
# define PNG_DEPRECATED __attribute__((__deprecated__))
|
||||
# endif
|
||||
# ifndef PNG_PRIVATE
|
||||
# if 0 /* Doesn't work so we use deprecated instead*/
|
||||
# define PNG_PRIVATE \
|
||||
__attribute__((warning("This function is not exported by libpng.")))
|
||||
# else
|
||||
# define PNG_PRIVATE \
|
||||
__attribute__((__deprecated__))
|
||||
# endif
|
||||
# endif
|
||||
# if ((__GNUC__ != 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
|
||||
# ifndef PNG_RESTRICT
|
||||
# define PNG_RESTRICT __restrict
|
||||
# endif
|
||||
# endif /* __GNUC__ == 3.0 */
|
||||
# endif /* __GNUC__ >= 3 */
|
||||
|
||||
# elif defined(_MSC_VER) && (_MSC_VER >= 1300)
|
||||
# ifndef PNG_USE_RESULT
|
||||
# define PNG_USE_RESULT /* not supported */
|
||||
# endif
|
||||
# ifndef PNG_NORETURN
|
||||
# define PNG_NORETURN __declspec(noreturn)
|
||||
# endif
|
||||
# ifndef PNG_ALLOCATED
|
||||
# if (_MSC_VER >= 1400)
|
||||
# define PNG_ALLOCATED __declspec(restrict)
|
||||
# endif
|
||||
# endif
|
||||
# ifndef PNG_DEPRECATED
|
||||
# define PNG_DEPRECATED __declspec(deprecated)
|
||||
# endif
|
||||
# ifndef PNG_PRIVATE
|
||||
# define PNG_PRIVATE __declspec(deprecated)
|
||||
# endif
|
||||
# ifndef PNG_RESTRICT
|
||||
# if (_MSC_VER >= 1400)
|
||||
# define PNG_RESTRICT __restrict
|
||||
# endif
|
||||
# endif
|
||||
|
||||
# elif defined(__WATCOMC__)
|
||||
# ifndef PNG_RESTRICT
|
||||
# define PNG_RESTRICT __restrict
|
||||
# endif
|
||||
# endif /* _MSC_VER */
|
||||
#endif /* PNG_PEDANTIC_WARNINGS */
|
||||
|
||||
#ifndef PNG_DEPRECATED
|
||||
# define PNG_DEPRECATED /* Use of this function is deprecated */
|
||||
#endif
|
||||
#ifndef PNG_USE_RESULT
|
||||
# define PNG_USE_RESULT /* The result of this function must be checked */
|
||||
#endif
|
||||
#ifndef PNG_NORETURN
|
||||
# define PNG_NORETURN /* This function does not return */
|
||||
#endif
|
||||
#ifndef PNG_ALLOCATED
|
||||
# define PNG_ALLOCATED /* The result of the function is new memory */
|
||||
#endif
|
||||
#ifndef PNG_PRIVATE
|
||||
# define PNG_PRIVATE /* This is a private libpng function */
|
||||
#endif
|
||||
#ifndef PNG_RESTRICT
|
||||
# define PNG_RESTRICT /* The C99 "restrict" feature */
|
||||
#endif
|
||||
#ifndef PNG_FP_EXPORT /* A floating point API. */
|
||||
# ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
# define PNG_FP_EXPORT(ordinal, type, name, args)\
|
||||
PNG_EXPORT(ordinal, type, name, args);
|
||||
# else /* No floating point APIs */
|
||||
# define PNG_FP_EXPORT(ordinal, type, name, args)
|
||||
# endif
|
||||
#endif
|
||||
#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
|
||||
# ifdef PNG_FIXED_POINT_SUPPORTED
|
||||
# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
|
||||
PNG_EXPORT(ordinal, type, name, args);
|
||||
# else /* No fixed point APIs */
|
||||
# define PNG_FIXED_EXPORT(ordinal, type, name, args)
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifndef PNG_BUILDING_SYMBOL_TABLE
|
||||
/* Some typedefs to get us started. These should be safe on most of the common
|
||||
* platforms.
|
||||
*
|
||||
* png_uint_32 and png_int_32 may, currently, be larger than required to hold a
|
||||
* 32-bit value however this is not normally advisable.
|
||||
*
|
||||
* png_uint_16 and png_int_16 should always be two bytes in size - this is
|
||||
* verified at library build time.
|
||||
*
|
||||
* png_byte must always be one byte in size.
|
||||
*
|
||||
* The checks below use constants from limits.h, as defined by the ISOC90
|
||||
* standard.
|
||||
*/
|
||||
#if CHAR_BIT == 8 && UCHAR_MAX == 255
|
||||
typedef unsigned char png_byte;
|
||||
#else
|
||||
# error "libpng requires 8 bit bytes"
|
||||
#endif
|
||||
|
||||
#if INT_MIN == -32768 && INT_MAX == 32767
|
||||
typedef int png_int_16;
|
||||
#elif SHRT_MIN == -32768 && SHRT_MAX == 32767
|
||||
typedef short png_int_16;
|
||||
#else
|
||||
# error "libpng requires a signed 16 bit type"
|
||||
#endif
|
||||
|
||||
#if UINT_MAX == 65535
|
||||
typedef unsigned int png_uint_16;
|
||||
#elif USHRT_MAX == 65535
|
||||
typedef unsigned short png_uint_16;
|
||||
#else
|
||||
# error "libpng requires an unsigned 16 bit type"
|
||||
#endif
|
||||
|
||||
#if INT_MIN < -2147483646 && INT_MAX > 2147483646
|
||||
typedef int png_int_32;
|
||||
#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
|
||||
typedef long int png_int_32;
|
||||
#else
|
||||
# error "libpng requires a signed 32 bit (or more) type"
|
||||
#endif
|
||||
|
||||
#if UINT_MAX > 4294967294
|
||||
typedef unsigned int png_uint_32;
|
||||
#elif ULONG_MAX > 4294967294
|
||||
typedef unsigned long int png_uint_32;
|
||||
#else
|
||||
# error "libpng requires an unsigned 32 bit (or more) type"
|
||||
#endif
|
||||
|
||||
/* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however,
|
||||
* requires an ISOC90 compiler and relies on consistent behavior of sizeof.
|
||||
*/
|
||||
typedef size_t png_size_t;
|
||||
typedef ptrdiff_t png_ptrdiff_t;
|
||||
|
||||
/* libpng needs to know the maximum value of 'size_t' and this controls the
|
||||
* definition of png_alloc_size_t, below. This maximum value of size_t limits
|
||||
* but does not control the maximum allocations the library makes - there is
|
||||
* direct application control of this through png_set_user_limits().
|
||||
*/
|
||||
#ifndef PNG_SMALL_SIZE_T
|
||||
/* Compiler specific tests for systems where size_t is known to be less than
|
||||
* 32 bits (some of these systems may no longer work because of the lack of
|
||||
* 'far' support; see above.)
|
||||
*/
|
||||
# if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
|
||||
(defined(_MSC_VER) && defined(MAXSEG_64K))
|
||||
# define PNG_SMALL_SIZE_T
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no
|
||||
* smaller than png_uint_32. Casts from png_size_t or png_uint_32 to
|
||||
* png_alloc_size_t are not necessary; in fact, it is recommended not to use
|
||||
* them at all so that the compiler can complain when something turns out to be
|
||||
* problematic.
|
||||
*
|
||||
* Casts in the other direction (from png_alloc_size_t to png_size_t or
|
||||
* png_uint_32) should be explicitly applied; however, we do not expect to
|
||||
* encounter practical situations that require such conversions.
|
||||
*
|
||||
* PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
|
||||
* 4294967295 - i.e. less than the maximum value of png_uint_32.
|
||||
*/
|
||||
#ifdef PNG_SMALL_SIZE_T
|
||||
typedef png_uint_32 png_alloc_size_t;
|
||||
#else
|
||||
typedef png_size_t png_alloc_size_t;
|
||||
#endif
|
||||
|
||||
/* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
|
||||
* implementations of Intel CPU specific support of user-mode segmented address
|
||||
* spaces, where 16-bit pointers address more than 65536 bytes of memory using
|
||||
* separate 'segment' registers. The implementation requires two different
|
||||
* types of pointer (only one of which includes the segment value.)
|
||||
*
|
||||
* If required this support is available in version 1.2 of libpng and may be
|
||||
* available in versions through 1.5, although the correctness of the code has
|
||||
* not been verified recently.
|
||||
*/
|
||||
|
||||
/* Typedef for floating-point numbers that are converted to fixed-point with a
|
||||
* multiple of 100,000, e.g., gamma
|
||||
*/
|
||||
typedef png_int_32 png_fixed_point;
|
||||
|
||||
/* Add typedefs for pointers */
|
||||
typedef void * png_voidp;
|
||||
typedef const void * png_const_voidp;
|
||||
typedef png_byte * png_bytep;
|
||||
typedef const png_byte * png_const_bytep;
|
||||
typedef png_uint_32 * png_uint_32p;
|
||||
typedef const png_uint_32 * png_const_uint_32p;
|
||||
typedef png_int_32 * png_int_32p;
|
||||
typedef const png_int_32 * png_const_int_32p;
|
||||
typedef png_uint_16 * png_uint_16p;
|
||||
typedef const png_uint_16 * png_const_uint_16p;
|
||||
typedef png_int_16 * png_int_16p;
|
||||
typedef const png_int_16 * png_const_int_16p;
|
||||
typedef char * png_charp;
|
||||
typedef const char * png_const_charp;
|
||||
typedef png_fixed_point * png_fixed_point_p;
|
||||
typedef const png_fixed_point * png_const_fixed_point_p;
|
||||
typedef png_size_t * png_size_tp;
|
||||
typedef const png_size_t * png_const_size_tp;
|
||||
|
||||
#ifdef PNG_STDIO_SUPPORTED
|
||||
typedef FILE * png_FILE_p;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
typedef double * png_doublep;
|
||||
typedef const double * png_const_doublep;
|
||||
#endif
|
||||
|
||||
/* Pointers to pointers; i.e. arrays */
|
||||
typedef png_byte * * png_bytepp;
|
||||
typedef png_uint_32 * * png_uint_32pp;
|
||||
typedef png_int_32 * * png_int_32pp;
|
||||
typedef png_uint_16 * * png_uint_16pp;
|
||||
typedef png_int_16 * * png_int_16pp;
|
||||
typedef const char * * png_const_charpp;
|
||||
typedef char * * png_charpp;
|
||||
typedef png_fixed_point * * png_fixed_point_pp;
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
typedef double * * png_doublepp;
|
||||
#endif
|
||||
|
||||
/* Pointers to pointers to pointers; i.e., pointer to array */
|
||||
typedef char * * * png_charppp;
|
||||
|
||||
#endif /* PNG_BUILDING_SYMBOL_TABLE */
|
||||
|
||||
#endif /* PNGCONF_H */
|
||||
@ -1,157 +0,0 @@
|
||||
|
||||
/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
|
||||
*
|
||||
* Copyright (c) 1998-2011 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.)
|
||||
*
|
||||
* Last changed in libpng 1.5.0 [January 6, 2011]
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
/* Define PNG_DEBUG at compile time for debugging information. Higher
|
||||
* numbers for PNG_DEBUG mean more debugging information. This has
|
||||
* only been added since version 0.95 so it is not implemented throughout
|
||||
* libpng yet, but more support will be added as needed.
|
||||
*
|
||||
* png_debug[1-2]?(level, message ,arg{0-2})
|
||||
* Expands to a statement (either a simple expression or a compound
|
||||
* do..while(0) statement) that outputs a message with parameter
|
||||
* substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG
|
||||
* is undefined, 0 or 1 every png_debug expands to a simple expression
|
||||
* (actually ((void)0)).
|
||||
*
|
||||
* level: level of detail of message, starting at 0. A level 'n'
|
||||
* message is preceded by 'n' tab characters (not implemented
|
||||
* on Microsoft compilers unless PNG_DEBUG_FILE is also
|
||||
* defined, to allow debug DLL compilation with no standard IO).
|
||||
* message: a printf(3) style text string. A trailing '\n' is added
|
||||
* to the message.
|
||||
* arg: 0 to 2 arguments for printf(3) style substitution in message.
|
||||
*/
|
||||
#ifndef PNGDEBUG_H
|
||||
#define PNGDEBUG_H
|
||||
/* These settings control the formatting of messages in png.c and pngerror.c */
|
||||
/* Moved to pngdebug.h at 1.5.0 */
|
||||
# ifndef PNG_LITERAL_SHARP
|
||||
# define PNG_LITERAL_SHARP 0x23
|
||||
# endif
|
||||
# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
|
||||
# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
|
||||
# endif
|
||||
# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
|
||||
# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
|
||||
# endif
|
||||
# ifndef PNG_STRING_NEWLINE
|
||||
# define PNG_STRING_NEWLINE "\n"
|
||||
# endif
|
||||
|
||||
#ifdef PNG_DEBUG
|
||||
# if (PNG_DEBUG > 0)
|
||||
# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
|
||||
# include <crtdbg.h>
|
||||
# if (PNG_DEBUG > 1)
|
||||
# ifndef _DEBUG
|
||||
# define _DEBUG
|
||||
# endif
|
||||
# ifndef png_debug
|
||||
# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
|
||||
# endif
|
||||
# ifndef png_debug1
|
||||
# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
|
||||
# endif
|
||||
# ifndef png_debug2
|
||||
# define png_debug2(l,m,p1,p2) \
|
||||
_RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
|
||||
# endif
|
||||
# endif
|
||||
# else /* PNG_DEBUG_FILE || !_MSC_VER */
|
||||
# ifndef PNG_STDIO_SUPPORTED
|
||||
# include <stdio.h> /* not included yet */
|
||||
# endif
|
||||
# ifndef PNG_DEBUG_FILE
|
||||
# define PNG_DEBUG_FILE stderr
|
||||
# endif /* PNG_DEBUG_FILE */
|
||||
|
||||
# if (PNG_DEBUG > 1)
|
||||
/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
|
||||
* non-ISO compilers
|
||||
*/
|
||||
# ifdef __STDC__
|
||||
# ifndef png_debug
|
||||
# define png_debug(l,m) \
|
||||
do { \
|
||||
int num_tabs=l; \
|
||||
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
|
||||
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
|
||||
} while (0)
|
||||
# endif
|
||||
# ifndef png_debug1
|
||||
# define png_debug1(l,m,p1) \
|
||||
do { \
|
||||
int num_tabs=l; \
|
||||
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
|
||||
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
|
||||
} while (0)
|
||||
# endif
|
||||
# ifndef png_debug2
|
||||
# define png_debug2(l,m,p1,p2) \
|
||||
do { \
|
||||
int num_tabs=l; \
|
||||
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
|
||||
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
|
||||
} while (0)
|
||||
# endif
|
||||
# else /* __STDC __ */
|
||||
# ifndef png_debug
|
||||
# define png_debug(l,m) \
|
||||
do { \
|
||||
int num_tabs=l; \
|
||||
char format[256]; \
|
||||
snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
|
||||
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
|
||||
m,PNG_STRING_NEWLINE); \
|
||||
fprintf(PNG_DEBUG_FILE,format); \
|
||||
} while (0)
|
||||
# endif
|
||||
# ifndef png_debug1
|
||||
# define png_debug1(l,m,p1) \
|
||||
do { \
|
||||
int num_tabs=l; \
|
||||
char format[256]; \
|
||||
snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
|
||||
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
|
||||
m,PNG_STRING_NEWLINE); \
|
||||
fprintf(PNG_DEBUG_FILE,format,p1); \
|
||||
} while (0)
|
||||
# endif
|
||||
# ifndef png_debug2
|
||||
# define png_debug2(l,m,p1,p2) \
|
||||
do { \
|
||||
int num_tabs=l; \
|
||||
char format[256]; \
|
||||
snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
|
||||
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
|
||||
m,PNG_STRING_NEWLINE); \
|
||||
fprintf(PNG_DEBUG_FILE,format,p1,p2); \
|
||||
} while (0)
|
||||
# endif
|
||||
# endif /* __STDC __ */
|
||||
# endif /* (PNG_DEBUG > 1) */
|
||||
|
||||
# endif /* _MSC_VER */
|
||||
# endif /* (PNG_DEBUG > 0) */
|
||||
#endif /* PNG_DEBUG */
|
||||
#ifndef png_debug
|
||||
# define png_debug(l, m) ((void)0)
|
||||
#endif
|
||||
#ifndef png_debug1
|
||||
# define png_debug1(l, m, p1) ((void)0)
|
||||
#endif
|
||||
#ifndef png_debug2
|
||||
# define png_debug2(l, m, p1, p2) ((void)0)
|
||||
#endif
|
||||
#endif /* PNGDEBUG_H */
|
||||
@ -1,932 +0,0 @@
|
||||
|
||||
/* pngerror.c - stub functions for i/o and memory allocation
|
||||
*
|
||||
* Last changed in libpng 1.6.1 [March 28, 2013]
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*
|
||||
* This file provides a location for all error handling. Users who
|
||||
* need special error handling are expected to write replacement functions
|
||||
* and use png_set_error_fn() to use those functions. See the instructions
|
||||
* at each function.
|
||||
*/
|
||||
|
||||
#include "pngpriv.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
|
||||
static PNG_FUNCTION(void, png_default_error,PNGARG((png_const_structrp png_ptr,
|
||||
png_const_charp error_message)),PNG_NORETURN);
|
||||
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
static void /* PRIVATE */
|
||||
png_default_warning PNGARG((png_const_structrp png_ptr,
|
||||
png_const_charp warning_message));
|
||||
#endif /* PNG_WARNINGS_SUPPORTED */
|
||||
|
||||
/* This function is called whenever there is a fatal error. This function
|
||||
* should not be changed. If there is a need to handle errors differently,
|
||||
* you should supply a replacement error function and use png_set_error_fn()
|
||||
* to replace the error function at run-time.
|
||||
*/
|
||||
#ifdef PNG_ERROR_TEXT_SUPPORTED
|
||||
PNG_FUNCTION(void,PNGAPI
|
||||
png_error,(png_const_structrp png_ptr, png_const_charp error_message),
|
||||
PNG_NORETURN)
|
||||
{
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
char msg[16];
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
if (png_ptr->flags&
|
||||
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
|
||||
{
|
||||
if (*error_message == PNG_LITERAL_SHARP)
|
||||
{
|
||||
/* Strip "#nnnn " from beginning of error message. */
|
||||
int offset;
|
||||
for (offset = 1; offset<15; offset++)
|
||||
if (error_message[offset] == ' ')
|
||||
break;
|
||||
|
||||
if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < offset - 1; i++)
|
||||
msg[i] = error_message[i + 1];
|
||||
msg[i - 1] = '\0';
|
||||
error_message = msg;
|
||||
}
|
||||
|
||||
else
|
||||
error_message += offset;
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
|
||||
{
|
||||
msg[0] = '0';
|
||||
msg[1] = '\0';
|
||||
error_message = msg;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
if (png_ptr != NULL && png_ptr->error_fn != NULL)
|
||||
(*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr),
|
||||
error_message);
|
||||
|
||||
/* If the custom handler doesn't exist, or if it returns,
|
||||
use the default handler, which will not return. */
|
||||
png_default_error(png_ptr, error_message);
|
||||
}
|
||||
#else
|
||||
PNG_FUNCTION(void,PNGAPI
|
||||
png_err,(png_const_structrp png_ptr),PNG_NORETURN)
|
||||
{
|
||||
/* Prior to 1.5.2 the error_fn received a NULL pointer, expressed
|
||||
* erroneously as '\0', instead of the empty string "". This was
|
||||
* apparently an error, introduced in libpng-1.2.20, and png_default_error
|
||||
* will crash in this case.
|
||||
*/
|
||||
if (png_ptr != NULL && png_ptr->error_fn != NULL)
|
||||
(*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), "");
|
||||
|
||||
/* If the custom handler doesn't exist, or if it returns,
|
||||
use the default handler, which will not return. */
|
||||
png_default_error(png_ptr, "");
|
||||
}
|
||||
#endif /* PNG_ERROR_TEXT_SUPPORTED */
|
||||
|
||||
/* Utility to safely appends strings to a buffer. This never errors out so
|
||||
* error checking is not required in the caller.
|
||||
*/
|
||||
size_t
|
||||
png_safecat(png_charp buffer, size_t bufsize, size_t pos,
|
||||
png_const_charp string)
|
||||
{
|
||||
if (buffer != NULL && pos < bufsize)
|
||||
{
|
||||
if (string != NULL)
|
||||
while (*string != '\0' && pos < bufsize-1)
|
||||
buffer[pos++] = *string++;
|
||||
|
||||
buffer[pos] = '\0';
|
||||
}
|
||||
|
||||
return pos;
|
||||
}
|
||||
|
||||
#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED)
|
||||
/* Utility to dump an unsigned value into a buffer, given a start pointer and
|
||||
* and end pointer (which should point just *beyond* the end of the buffer!)
|
||||
* Returns the pointer to the start of the formatted string.
|
||||
*/
|
||||
png_charp
|
||||
png_format_number(png_const_charp start, png_charp end, int format,
|
||||
png_alloc_size_t number)
|
||||
{
|
||||
int count = 0; /* number of digits output */
|
||||
int mincount = 1; /* minimum number required */
|
||||
int output = 0; /* digit output (for the fixed point format) */
|
||||
|
||||
*--end = '\0';
|
||||
|
||||
/* This is written so that the loop always runs at least once, even with
|
||||
* number zero.
|
||||
*/
|
||||
while (end > start && (number != 0 || count < mincount))
|
||||
{
|
||||
|
||||
static const char digits[] = "0123456789ABCDEF";
|
||||
|
||||
switch (format)
|
||||
{
|
||||
case PNG_NUMBER_FORMAT_fixed:
|
||||
/* Needs five digits (the fraction) */
|
||||
mincount = 5;
|
||||
if (output || number % 10 != 0)
|
||||
{
|
||||
*--end = digits[number % 10];
|
||||
output = 1;
|
||||
}
|
||||
number /= 10;
|
||||
break;
|
||||
|
||||
case PNG_NUMBER_FORMAT_02u:
|
||||
/* Expects at least 2 digits. */
|
||||
mincount = 2;
|
||||
/* FALL THROUGH */
|
||||
|
||||
case PNG_NUMBER_FORMAT_u:
|
||||
*--end = digits[number % 10];
|
||||
number /= 10;
|
||||
break;
|
||||
|
||||
case PNG_NUMBER_FORMAT_02x:
|
||||
/* This format expects at least two digits */
|
||||
mincount = 2;
|
||||
/* FALL THROUGH */
|
||||
|
||||
case PNG_NUMBER_FORMAT_x:
|
||||
*--end = digits[number & 0xf];
|
||||
number >>= 4;
|
||||
break;
|
||||
|
||||
default: /* an error */
|
||||
number = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
/* Keep track of the number of digits added */
|
||||
++count;
|
||||
|
||||
/* Float a fixed number here: */
|
||||
if (format == PNG_NUMBER_FORMAT_fixed) if (count == 5) if (end > start)
|
||||
{
|
||||
/* End of the fraction, but maybe nothing was output? In that case
|
||||
* drop the decimal point. If the number is a true zero handle that
|
||||
* here.
|
||||
*/
|
||||
if (output)
|
||||
*--end = '.';
|
||||
else if (number == 0) /* and !output */
|
||||
*--end = '0';
|
||||
}
|
||||
}
|
||||
|
||||
return end;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
/* This function is called whenever there is a non-fatal error. This function
|
||||
* should not be changed. If there is a need to handle warnings differently,
|
||||
* you should supply a replacement warning function and use
|
||||
* png_set_error_fn() to replace the warning function at run-time.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_warning(png_const_structrp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
int offset = 0;
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (png_ptr->flags&
|
||||
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
|
||||
#endif
|
||||
{
|
||||
if (*warning_message == PNG_LITERAL_SHARP)
|
||||
{
|
||||
for (offset = 1; offset < 15; offset++)
|
||||
if (warning_message[offset] == ' ')
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (png_ptr != NULL && png_ptr->warning_fn != NULL)
|
||||
(*(png_ptr->warning_fn))(png_constcast(png_structrp,png_ptr),
|
||||
warning_message + offset);
|
||||
else
|
||||
png_default_warning(png_ptr, warning_message + offset);
|
||||
}
|
||||
|
||||
/* These functions support 'formatted' warning messages with up to
|
||||
* PNG_WARNING_PARAMETER_COUNT parameters. In the format string the parameter
|
||||
* is introduced by @<number>, where 'number' starts at 1. This follows the
|
||||
* standard established by X/Open for internationalizable error messages.
|
||||
*/
|
||||
void
|
||||
png_warning_parameter(png_warning_parameters p, int number,
|
||||
png_const_charp string)
|
||||
{
|
||||
if (number > 0 && number <= PNG_WARNING_PARAMETER_COUNT)
|
||||
(void)png_safecat(p[number-1], (sizeof p[number-1]), 0, string);
|
||||
}
|
||||
|
||||
void
|
||||
png_warning_parameter_unsigned(png_warning_parameters p, int number, int format,
|
||||
png_alloc_size_t value)
|
||||
{
|
||||
char buffer[PNG_NUMBER_BUFFER_SIZE];
|
||||
png_warning_parameter(p, number, PNG_FORMAT_NUMBER(buffer, format, value));
|
||||
}
|
||||
|
||||
void
|
||||
png_warning_parameter_signed(png_warning_parameters p, int number, int format,
|
||||
png_int_32 value)
|
||||
{
|
||||
png_alloc_size_t u;
|
||||
png_charp str;
|
||||
char buffer[PNG_NUMBER_BUFFER_SIZE];
|
||||
|
||||
/* Avoid overflow by doing the negate in a png_alloc_size_t: */
|
||||
u = (png_alloc_size_t)value;
|
||||
if (value < 0)
|
||||
u = ~u + 1;
|
||||
|
||||
str = PNG_FORMAT_NUMBER(buffer, format, u);
|
||||
|
||||
if (value < 0 && str > buffer)
|
||||
*--str = '-';
|
||||
|
||||
png_warning_parameter(p, number, str);
|
||||
}
|
||||
|
||||
void
|
||||
png_formatted_warning(png_const_structrp png_ptr, png_warning_parameters p,
|
||||
png_const_charp message)
|
||||
{
|
||||
/* The internal buffer is just 192 bytes - enough for all our messages,
|
||||
* overflow doesn't happen because this code checks! If someone figures
|
||||
* out how to send us a message longer than 192 bytes, all that will
|
||||
* happen is that the message will be truncated appropriately.
|
||||
*/
|
||||
size_t i = 0; /* Index in the msg[] buffer: */
|
||||
char msg[192];
|
||||
|
||||
/* Each iteration through the following loop writes at most one character
|
||||
* to msg[i++] then returns here to validate that there is still space for
|
||||
* the trailing '\0'. It may (in the case of a parameter) read more than
|
||||
* one character from message[]; it must check for '\0' and continue to the
|
||||
* test if it finds the end of string.
|
||||
*/
|
||||
while (i<(sizeof msg)-1 && *message != '\0')
|
||||
{
|
||||
/* '@' at end of string is now just printed (previously it was skipped);
|
||||
* it is an error in the calling code to terminate the string with @.
|
||||
*/
|
||||
if (p != NULL && *message == '@' && message[1] != '\0')
|
||||
{
|
||||
int parameter_char = *++message; /* Consume the '@' */
|
||||
static const char valid_parameters[] = "123456789";
|
||||
int parameter = 0;
|
||||
|
||||
/* Search for the parameter digit, the index in the string is the
|
||||
* parameter to use.
|
||||
*/
|
||||
while (valid_parameters[parameter] != parameter_char &&
|
||||
valid_parameters[parameter] != '\0')
|
||||
++parameter;
|
||||
|
||||
/* If the parameter digit is out of range it will just get printed. */
|
||||
if (parameter < PNG_WARNING_PARAMETER_COUNT)
|
||||
{
|
||||
/* Append this parameter */
|
||||
png_const_charp parm = p[parameter];
|
||||
png_const_charp pend = p[parameter] + (sizeof p[parameter]);
|
||||
|
||||
/* No need to copy the trailing '\0' here, but there is no guarantee
|
||||
* that parm[] has been initialized, so there is no guarantee of a
|
||||
* trailing '\0':
|
||||
*/
|
||||
while (i<(sizeof msg)-1 && *parm != '\0' && parm < pend)
|
||||
msg[i++] = *parm++;
|
||||
|
||||
/* Consume the parameter digit too: */
|
||||
++message;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* else not a parameter and there is a character after the @ sign; just
|
||||
* copy that. This is known not to be '\0' because of the test above.
|
||||
*/
|
||||
}
|
||||
|
||||
/* At this point *message can't be '\0', even in the bad parameter case
|
||||
* above where there is a lone '@' at the end of the message string.
|
||||
*/
|
||||
msg[i++] = *message++;
|
||||
}
|
||||
|
||||
/* i is always less than (sizeof msg), so: */
|
||||
msg[i] = '\0';
|
||||
|
||||
/* And this is the formatted message. It may be larger than
|
||||
* PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these
|
||||
* are not (currently) formatted.
|
||||
*/
|
||||
png_warning(png_ptr, msg);
|
||||
}
|
||||
#endif /* PNG_WARNINGS_SUPPORTED */
|
||||
|
||||
#ifdef PNG_BENIGN_ERRORS_SUPPORTED
|
||||
void PNGAPI
|
||||
png_benign_error(png_const_structrp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
|
||||
{
|
||||
# ifdef PNG_READ_SUPPORTED
|
||||
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 &&
|
||||
png_ptr->chunk_name != 0)
|
||||
png_chunk_warning(png_ptr, error_message);
|
||||
else
|
||||
# endif
|
||||
png_warning(png_ptr, error_message);
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
# ifdef PNG_READ_SUPPORTED
|
||||
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 &&
|
||||
png_ptr->chunk_name != 0)
|
||||
png_chunk_error(png_ptr, error_message);
|
||||
else
|
||||
# endif
|
||||
png_error(png_ptr, error_message);
|
||||
}
|
||||
}
|
||||
|
||||
void /* PRIVATE */
|
||||
png_app_warning(png_const_structrp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
if (png_ptr->flags & PNG_FLAG_APP_WARNINGS_WARN)
|
||||
png_warning(png_ptr, error_message);
|
||||
else
|
||||
png_error(png_ptr, error_message);
|
||||
}
|
||||
|
||||
void /* PRIVATE */
|
||||
png_app_error(png_const_structrp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
if (png_ptr->flags & PNG_FLAG_APP_ERRORS_WARN)
|
||||
png_warning(png_ptr, error_message);
|
||||
else
|
||||
png_error(png_ptr, error_message);
|
||||
}
|
||||
#endif /* BENIGN_ERRORS */
|
||||
|
||||
/* These utilities are used internally to build an error message that relates
|
||||
* to the current chunk. The chunk name comes from png_ptr->chunk_name,
|
||||
* this is used to prefix the message. The message is limited in length
|
||||
* to 63 bytes, the name characters are output as hex digits wrapped in []
|
||||
* if the character is invalid.
|
||||
*/
|
||||
#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
|
||||
static PNG_CONST char png_digit[16] = {
|
||||
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
|
||||
'A', 'B', 'C', 'D', 'E', 'F'
|
||||
};
|
||||
|
||||
#define PNG_MAX_ERROR_TEXT 196 /* Currently limited be profile_error in png.c */
|
||||
#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
|
||||
static void /* PRIVATE */
|
||||
png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp
|
||||
error_message)
|
||||
{
|
||||
png_uint_32 chunk_name = png_ptr->chunk_name;
|
||||
int iout = 0, ishift = 24;
|
||||
|
||||
while (ishift >= 0)
|
||||
{
|
||||
int c = (int)(chunk_name >> ishift) & 0xff;
|
||||
|
||||
ishift -= 8;
|
||||
if (isnonalpha(c))
|
||||
{
|
||||
buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET;
|
||||
buffer[iout++] = png_digit[(c & 0xf0) >> 4];
|
||||
buffer[iout++] = png_digit[c & 0x0f];
|
||||
buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET;
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
buffer[iout++] = (char)c;
|
||||
}
|
||||
}
|
||||
|
||||
if (error_message == NULL)
|
||||
buffer[iout] = '\0';
|
||||
|
||||
else
|
||||
{
|
||||
int iin = 0;
|
||||
|
||||
buffer[iout++] = ':';
|
||||
buffer[iout++] = ' ';
|
||||
|
||||
while (iin < PNG_MAX_ERROR_TEXT-1 && error_message[iin] != '\0')
|
||||
buffer[iout++] = error_message[iin++];
|
||||
|
||||
/* iin < PNG_MAX_ERROR_TEXT, so the following is safe: */
|
||||
buffer[iout] = '\0';
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
|
||||
PNG_FUNCTION(void,PNGAPI
|
||||
png_chunk_error,(png_const_structrp png_ptr, png_const_charp error_message),
|
||||
PNG_NORETURN)
|
||||
{
|
||||
char msg[18+PNG_MAX_ERROR_TEXT];
|
||||
if (png_ptr == NULL)
|
||||
png_error(png_ptr, error_message);
|
||||
|
||||
else
|
||||
{
|
||||
png_format_buffer(png_ptr, msg, error_message);
|
||||
png_error(png_ptr, msg);
|
||||
}
|
||||
}
|
||||
#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */
|
||||
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
void PNGAPI
|
||||
png_chunk_warning(png_const_structrp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
char msg[18+PNG_MAX_ERROR_TEXT];
|
||||
if (png_ptr == NULL)
|
||||
png_warning(png_ptr, warning_message);
|
||||
|
||||
else
|
||||
{
|
||||
png_format_buffer(png_ptr, msg, warning_message);
|
||||
png_warning(png_ptr, msg);
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WARNINGS_SUPPORTED */
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
#ifdef PNG_BENIGN_ERRORS_SUPPORTED
|
||||
void PNGAPI
|
||||
png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp
|
||||
error_message)
|
||||
{
|
||||
if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
|
||||
png_chunk_warning(png_ptr, error_message);
|
||||
|
||||
else
|
||||
png_chunk_error(png_ptr, error_message);
|
||||
}
|
||||
#endif
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
|
||||
void /* PRIVATE */
|
||||
png_chunk_report(png_const_structrp png_ptr, png_const_charp message, int error)
|
||||
{
|
||||
/* This is always supported, but for just read or just write it
|
||||
* unconditionally does the right thing.
|
||||
*/
|
||||
# if defined(PNG_READ_SUPPORTED) && defined(PNG_WRITE_SUPPORTED)
|
||||
if (png_ptr->mode & PNG_IS_READ_STRUCT)
|
||||
# endif
|
||||
|
||||
# ifdef PNG_READ_SUPPORTED
|
||||
{
|
||||
if (error < PNG_CHUNK_ERROR)
|
||||
png_chunk_warning(png_ptr, message);
|
||||
|
||||
else
|
||||
png_chunk_benign_error(png_ptr, message);
|
||||
}
|
||||
# endif
|
||||
|
||||
# if defined(PNG_READ_SUPPORTED) && defined(PNG_WRITE_SUPPORTED)
|
||||
else if (!(png_ptr->mode & PNG_IS_READ_STRUCT))
|
||||
# endif
|
||||
|
||||
# ifdef PNG_WRITE_SUPPORTED
|
||||
{
|
||||
if (error < PNG_CHUNK_WRITE_ERROR)
|
||||
png_app_warning(png_ptr, message);
|
||||
|
||||
else
|
||||
png_app_error(png_ptr, message);
|
||||
}
|
||||
# endif
|
||||
}
|
||||
|
||||
#ifdef PNG_ERROR_TEXT_SUPPORTED
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
PNG_FUNCTION(void,
|
||||
png_fixed_error,(png_const_structrp png_ptr, png_const_charp name),PNG_NORETURN)
|
||||
{
|
||||
# define fixed_message "fixed point overflow in "
|
||||
# define fixed_message_ln ((sizeof fixed_message)-1)
|
||||
int iin;
|
||||
char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT];
|
||||
memcpy(msg, fixed_message, fixed_message_ln);
|
||||
iin = 0;
|
||||
if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0)
|
||||
{
|
||||
msg[fixed_message_ln + iin] = name[iin];
|
||||
++iin;
|
||||
}
|
||||
msg[fixed_message_ln + iin] = 0;
|
||||
png_error(png_ptr, msg);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
/* This API only exists if ANSI-C style error handling is used,
|
||||
* otherwise it is necessary for png_default_error to be overridden.
|
||||
*/
|
||||
jmp_buf* PNGAPI
|
||||
png_set_longjmp_fn(png_structrp png_ptr, png_longjmp_ptr longjmp_fn,
|
||||
size_t jmp_buf_size)
|
||||
{
|
||||
/* From libpng 1.6.0 the app gets one chance to set a 'jmpbuf_size' value
|
||||
* and it must not change after that. Libpng doesn't care how big the
|
||||
* buffer is, just that it doesn't change.
|
||||
*
|
||||
* If the buffer size is no *larger* than the size of jmp_buf when libpng is
|
||||
* compiled a built in jmp_buf is returned; this preserves the pre-1.6.0
|
||||
* semantics that this call will not fail. If the size is larger, however,
|
||||
* the buffer is allocated and this may fail, causing the function to return
|
||||
* NULL.
|
||||
*/
|
||||
if (png_ptr == NULL)
|
||||
return NULL;
|
||||
|
||||
if (png_ptr->jmp_buf_ptr == NULL)
|
||||
{
|
||||
png_ptr->jmp_buf_size = 0; /* not allocated */
|
||||
|
||||
if (jmp_buf_size <= (sizeof png_ptr->jmp_buf_local))
|
||||
png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local;
|
||||
|
||||
else
|
||||
{
|
||||
png_ptr->jmp_buf_ptr = png_voidcast(jmp_buf *,
|
||||
png_malloc_warn(png_ptr, jmp_buf_size));
|
||||
|
||||
if (png_ptr->jmp_buf_ptr == NULL)
|
||||
return NULL; /* new NULL return on OOM */
|
||||
|
||||
png_ptr->jmp_buf_size = jmp_buf_size;
|
||||
}
|
||||
}
|
||||
|
||||
else /* Already allocated: check the size */
|
||||
{
|
||||
size_t size = png_ptr->jmp_buf_size;
|
||||
|
||||
if (size == 0)
|
||||
{
|
||||
size = (sizeof png_ptr->jmp_buf_local);
|
||||
if (png_ptr->jmp_buf_ptr != &png_ptr->jmp_buf_local)
|
||||
{
|
||||
/* This is an internal error in libpng: somehow we have been left
|
||||
* with a stack allocated jmp_buf when the application regained
|
||||
* control. It's always possible to fix this up, but for the moment
|
||||
* this is a png_error because that makes it easy to detect.
|
||||
*/
|
||||
png_error(png_ptr, "Libpng jmp_buf still allocated");
|
||||
/* png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local; */
|
||||
}
|
||||
}
|
||||
|
||||
if (size != jmp_buf_size)
|
||||
{
|
||||
png_warning(png_ptr, "Application jmp_buf size changed");
|
||||
return NULL; /* caller will probably crash: no choice here */
|
||||
}
|
||||
}
|
||||
|
||||
/* Finally fill in the function, now we have a satisfactory buffer. It is
|
||||
* valid to change the function on every call.
|
||||
*/
|
||||
png_ptr->longjmp_fn = longjmp_fn;
|
||||
return png_ptr->jmp_buf_ptr;
|
||||
}
|
||||
|
||||
void /* PRIVATE */
|
||||
png_free_jmpbuf(png_structrp png_ptr)
|
||||
{
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
jmp_buf *jb = png_ptr->jmp_buf_ptr;
|
||||
|
||||
/* A size of 0 is used to indicate a local, stack, allocation of the
|
||||
* pointer; used here and in png.c
|
||||
*/
|
||||
if (jb != NULL && png_ptr->jmp_buf_size > 0)
|
||||
{
|
||||
|
||||
/* This stuff is so that a failure to free the error control structure
|
||||
* does not leave libpng in a state with no valid error handling: the
|
||||
* free always succeeds, if there is an error it gets ignored.
|
||||
*/
|
||||
if (jb != &png_ptr->jmp_buf_local)
|
||||
{
|
||||
/* Make an internal, libpng, jmp_buf to return here */
|
||||
jmp_buf free_jmp_buf;
|
||||
|
||||
if (!setjmp(free_jmp_buf))
|
||||
{
|
||||
png_ptr->jmp_buf_ptr = &free_jmp_buf; /* come back here */
|
||||
png_ptr->jmp_buf_size = 0; /* stack allocation */
|
||||
png_ptr->longjmp_fn = longjmp;
|
||||
png_free(png_ptr, jb); /* Return to setjmp on error */
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* *Always* cancel everything out: */
|
||||
png_ptr->jmp_buf_size = 0;
|
||||
png_ptr->jmp_buf_ptr = NULL;
|
||||
png_ptr->longjmp_fn = 0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This is the default error handling function. Note that replacements for
|
||||
* this function MUST NOT RETURN, or the program will likely crash. This
|
||||
* function is used by default, or if the program supplies NULL for the
|
||||
* error function pointer in png_set_error_fn().
|
||||
*/
|
||||
static PNG_FUNCTION(void /* PRIVATE */,
|
||||
png_default_error,(png_const_structrp png_ptr, png_const_charp error_message),
|
||||
PNG_NORETURN)
|
||||
{
|
||||
#ifdef PNG_CONSOLE_IO_SUPPORTED
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
/* Check on NULL only added in 1.5.4 */
|
||||
if (error_message != NULL && *error_message == PNG_LITERAL_SHARP)
|
||||
{
|
||||
/* Strip "#nnnn " from beginning of error message. */
|
||||
int offset;
|
||||
char error_number[16];
|
||||
for (offset = 0; offset<15; offset++)
|
||||
{
|
||||
error_number[offset] = error_message[offset + 1];
|
||||
if (error_message[offset] == ' ')
|
||||
break;
|
||||
}
|
||||
|
||||
if ((offset > 1) && (offset < 15))
|
||||
{
|
||||
error_number[offset - 1] = '\0';
|
||||
fprintf(stderr, "libpng error no. %s: %s",
|
||||
error_number, error_message + offset + 1);
|
||||
fprintf(stderr, PNG_STRING_NEWLINE);
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "libpng error: %s, offset=%d",
|
||||
error_message, offset);
|
||||
fprintf(stderr, PNG_STRING_NEWLINE);
|
||||
}
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
fprintf(stderr, "libpng error: %s", error_message ? error_message :
|
||||
"undefined");
|
||||
fprintf(stderr, PNG_STRING_NEWLINE);
|
||||
}
|
||||
#else
|
||||
PNG_UNUSED(error_message) /* Make compiler happy */
|
||||
#endif
|
||||
png_longjmp(png_ptr, 1);
|
||||
}
|
||||
|
||||
PNG_FUNCTION(void,PNGAPI
|
||||
png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN)
|
||||
{
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
if (png_ptr && png_ptr->longjmp_fn && png_ptr->jmp_buf_ptr)
|
||||
png_ptr->longjmp_fn(*png_ptr->jmp_buf_ptr, val);
|
||||
#endif
|
||||
|
||||
/* Here if not setjmp support or if png_ptr is null. */
|
||||
PNG_ABORT();
|
||||
}
|
||||
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
/* This function is called when there is a warning, but the library thinks
|
||||
* it can continue anyway. Replacement functions don't have to do anything
|
||||
* here if you don't want them to. In the default configuration, png_ptr is
|
||||
* not used, but it is passed in case it may be useful.
|
||||
*/
|
||||
static void /* PRIVATE */
|
||||
png_default_warning(png_const_structrp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
#ifdef PNG_CONSOLE_IO_SUPPORTED
|
||||
# ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (*warning_message == PNG_LITERAL_SHARP)
|
||||
{
|
||||
int offset;
|
||||
char warning_number[16];
|
||||
for (offset = 0; offset < 15; offset++)
|
||||
{
|
||||
warning_number[offset] = warning_message[offset + 1];
|
||||
if (warning_message[offset] == ' ')
|
||||
break;
|
||||
}
|
||||
|
||||
if ((offset > 1) && (offset < 15))
|
||||
{
|
||||
warning_number[offset + 1] = '\0';
|
||||
fprintf(stderr, "libpng warning no. %s: %s",
|
||||
warning_number, warning_message + offset);
|
||||
fprintf(stderr, PNG_STRING_NEWLINE);
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "libpng warning: %s",
|
||||
warning_message);
|
||||
fprintf(stderr, PNG_STRING_NEWLINE);
|
||||
}
|
||||
}
|
||||
else
|
||||
# endif
|
||||
|
||||
{
|
||||
fprintf(stderr, "libpng warning: %s", warning_message);
|
||||
fprintf(stderr, PNG_STRING_NEWLINE);
|
||||
}
|
||||
#else
|
||||
PNG_UNUSED(warning_message) /* Make compiler happy */
|
||||
#endif
|
||||
PNG_UNUSED(png_ptr) /* Make compiler happy */
|
||||
}
|
||||
#endif /* PNG_WARNINGS_SUPPORTED */
|
||||
|
||||
/* This function is called when the application wants to use another method
|
||||
* of handling errors and warnings. Note that the error function MUST NOT
|
||||
* return to the calling routine or serious problems will occur. The return
|
||||
* method used in the default routine calls longjmp(png_ptr->jmp_buf_ptr, 1)
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_error_fn(png_structrp png_ptr, png_voidp error_ptr,
|
||||
png_error_ptr error_fn, png_error_ptr warning_fn)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->error_ptr = error_ptr;
|
||||
png_ptr->error_fn = error_fn;
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
png_ptr->warning_fn = warning_fn;
|
||||
#else
|
||||
PNG_UNUSED(warning_fn)
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/* This function returns a pointer to the error_ptr associated with the user
|
||||
* functions. The application should free any memory associated with this
|
||||
* pointer before png_write_destroy and png_read_destroy are called.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_error_ptr(png_const_structrp png_ptr)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return NULL;
|
||||
|
||||
return ((png_voidp)png_ptr->error_ptr);
|
||||
}
|
||||
|
||||
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
void PNGAPI
|
||||
png_set_strip_error_numbers(png_structrp png_ptr, png_uint_32 strip_mode)
|
||||
{
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
png_ptr->flags &=
|
||||
((~(PNG_FLAG_STRIP_ERROR_NUMBERS |
|
||||
PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
|
||||
defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
|
||||
/* Currently the above both depend on SETJMP_SUPPORTED, however it would be
|
||||
* possible to implement without setjmp support just so long as there is some
|
||||
* way to handle the error return here:
|
||||
*/
|
||||
PNG_FUNCTION(void /* PRIVATE */,
|
||||
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_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr);
|
||||
|
||||
/* An error is always logged here, overwriting anything (typically a warning)
|
||||
* that is already there:
|
||||
*/
|
||||
if (image != NULL)
|
||||
{
|
||||
png_safecat(image->message, (sizeof image->message), 0, error_message);
|
||||
image->warning_or_error |= PNG_IMAGE_ERROR;
|
||||
|
||||
/* Retrieve the jmp_buf from within the png_control, making this work for
|
||||
* C++ compilation too is pretty tricky: C++ wants a pointer to the first
|
||||
* element of a jmp_buf, but C doesn't tell us the type of that.
|
||||
*/
|
||||
if (image->opaque != NULL && image->opaque->error_buf != NULL)
|
||||
longjmp(png_control_jmp_buf(image->opaque), 1);
|
||||
|
||||
/* Missing longjmp buffer, the following is to help debugging: */
|
||||
{
|
||||
size_t pos = png_safecat(image->message, (sizeof image->message), 0,
|
||||
"bad longjmp: ");
|
||||
png_safecat(image->message, (sizeof image->message), pos,
|
||||
error_message);
|
||||
}
|
||||
}
|
||||
|
||||
/* Here on an internal programming error. */
|
||||
abort();
|
||||
}
|
||||
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
void /* PRIVATE */
|
||||
png_safe_warning(png_structp png_nonconst_ptr, png_const_charp warning_message)
|
||||
{
|
||||
const 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. */
|
||||
if (image->warning_or_error == 0)
|
||||
{
|
||||
png_safecat(image->message, (sizeof image->message), 0, warning_message);
|
||||
image->warning_or_error |= PNG_IMAGE_WARNING;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
int /* PRIVATE */
|
||||
png_safe_execute(png_imagep image_in, int (*function)(png_voidp), png_voidp arg)
|
||||
{
|
||||
volatile png_imagep image = image_in;
|
||||
volatile int result;
|
||||
volatile png_voidp saved_error_buf;
|
||||
jmp_buf safe_jmpbuf;
|
||||
|
||||
/* Safely execute function(arg) with png_error returning to this function. */
|
||||
saved_error_buf = image->opaque->error_buf;
|
||||
result = setjmp(safe_jmpbuf) == 0;
|
||||
|
||||
if (result)
|
||||
{
|
||||
|
||||
image->opaque->error_buf = safe_jmpbuf;
|
||||
result = function(arg);
|
||||
}
|
||||
|
||||
image->opaque->error_buf = saved_error_buf;
|
||||
|
||||
/* And do the cleanup prior to any failure return. */
|
||||
if (!result)
|
||||
png_image_free(image);
|
||||
|
||||
return result;
|
||||
}
|
||||
#endif /* SIMPLIFIED READ/WRITE */
|
||||
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
@ -1,260 +0,0 @@
|
||||
|
||||
/* pnginfo.h - header file for PNG reference library
|
||||
*
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* Last changed in libpng 1.6.1 [March 28, 2013]
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
/* png_info is a structure that holds the information in a PNG file so
|
||||
* that the application can find out the characteristics of the image.
|
||||
* If you are reading the file, this structure will tell you what is
|
||||
* in the PNG file. If you are writing the file, fill in the information
|
||||
* you want to put into the PNG file, using png_set_*() functions, then
|
||||
* call png_write_info().
|
||||
*
|
||||
* The names chosen should be very close to the PNG specification, so
|
||||
* consult that document for information about the meaning of each field.
|
||||
*
|
||||
* With libpng < 0.95, it was only possible to directly set and read the
|
||||
* the values in the png_info_struct, which meant that the contents and
|
||||
* order of the values had to remain fixed. With libpng 0.95 and later,
|
||||
* however, there are now functions that abstract the contents of
|
||||
* png_info_struct from the application, so this makes it easier to use
|
||||
* libpng with dynamic libraries, and even makes it possible to use
|
||||
* libraries that don't have all of the libpng ancillary chunk-handing
|
||||
* functionality. In libpng-1.5.0 this was moved into a separate private
|
||||
* file that is not visible to applications.
|
||||
*
|
||||
* The following members may have allocated storage attached that should be
|
||||
* cleaned up before the structure is discarded: palette, trans, text,
|
||||
* pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
|
||||
* splt_palettes, scal_unit, row_pointers, and unknowns. By default, these
|
||||
* are automatically freed when the info structure is deallocated, if they were
|
||||
* allocated internally by libpng. This behavior can be changed by means
|
||||
* of the png_data_freer() function.
|
||||
*
|
||||
* More allocation details: all the chunk-reading functions that
|
||||
* change these members go through the corresponding png_set_*
|
||||
* functions. A function to clear these members is available: see
|
||||
* png_free_data(). The png_set_* functions do not depend on being
|
||||
* able to point info structure members to any of the storage they are
|
||||
* passed (they make their own copies), EXCEPT that the png_set_text
|
||||
* functions use the same storage passed to them in the text_ptr or
|
||||
* itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
|
||||
* functions do not make their own copies.
|
||||
*/
|
||||
#ifndef PNGINFO_H
|
||||
#define PNGINFO_H
|
||||
|
||||
struct png_info_def
|
||||
{
|
||||
/* The following are necessary for every PNG file */
|
||||
png_uint_32 width; /* width of image in pixels (from IHDR) */
|
||||
png_uint_32 height; /* height of image in pixels (from IHDR) */
|
||||
png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */
|
||||
png_size_t rowbytes; /* bytes needed to hold an untransformed row */
|
||||
png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */
|
||||
png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */
|
||||
png_uint_16 num_trans; /* number of transparent palette color (tRNS) */
|
||||
png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */
|
||||
png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */
|
||||
/* The following three should have been named *_method not *_type */
|
||||
png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */
|
||||
png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */
|
||||
png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
|
||||
|
||||
/* The following are set by png_set_IHDR, called from the application on
|
||||
* write, but the are never actually used by the write code.
|
||||
*/
|
||||
png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */
|
||||
png_byte pixel_depth; /* number of bits per pixel */
|
||||
png_byte spare_byte; /* to align the data, and for future use */
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
/* This is never set during write */
|
||||
png_byte signature[8]; /* magic bytes read by libpng from start of file */
|
||||
#endif
|
||||
|
||||
/* The rest of the data is optional. If you are reading, check the
|
||||
* valid field to see if the information in these are valid. If you
|
||||
* are writing, set the valid field to those chunks you want written,
|
||||
* and initialize the appropriate fields below.
|
||||
*/
|
||||
|
||||
#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
|
||||
/* png_colorspace only contains 'flags' if neither GAMMA or COLORSPACE are
|
||||
* defined. When COLORSPACE is switched on all the colorspace-defining
|
||||
* chunks should be enabled, when GAMMA is switched on all the gamma-defining
|
||||
* chunks should be enabled. If this is not done it becomes possible to read
|
||||
* inconsistent PNG files and assign a probably incorrect interpretation to
|
||||
* the information. (In other words, by carefully choosing which chunks to
|
||||
* recognize the system configuration can select an interpretation for PNG
|
||||
* files containing ambiguous data and this will result in inconsistent
|
||||
* behavior between different libpng builds!)
|
||||
*/
|
||||
png_colorspace colorspace;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_iCCP_SUPPORTED
|
||||
/* iCCP chunk data. */
|
||||
png_charp iccp_name; /* profile name */
|
||||
png_bytep iccp_profile; /* International Color Consortium profile data */
|
||||
png_uint_32 iccp_proflen; /* ICC profile data length */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_TEXT_SUPPORTED
|
||||
/* The tEXt, and zTXt chunks contain human-readable textual data in
|
||||
* uncompressed, compressed, and optionally compressed forms, respectively.
|
||||
* The data in "text" is an array of pointers to uncompressed,
|
||||
* null-terminated C strings. Each chunk has a keyword that describes the
|
||||
* textual data contained in that chunk. Keywords are not required to be
|
||||
* unique, and the text string may be empty. Any number of text chunks may
|
||||
* be in an image.
|
||||
*/
|
||||
int num_text; /* number of comments read or comments to write */
|
||||
int max_text; /* current size of text array */
|
||||
png_textp text; /* array of comments read or comments to write */
|
||||
#endif /* PNG_TEXT_SUPPORTED */
|
||||
|
||||
#ifdef PNG_tIME_SUPPORTED
|
||||
/* The tIME chunk holds the last time the displayed image data was
|
||||
* modified. See the png_time struct for the contents of this struct.
|
||||
*/
|
||||
png_time mod_time;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_sBIT_SUPPORTED
|
||||
/* The sBIT chunk specifies the number of significant high-order bits
|
||||
* in the pixel data. Values are in the range [1, bit_depth], and are
|
||||
* only specified for the channels in the pixel data. The contents of
|
||||
* the low-order bits is not specified. Data is valid if
|
||||
* (valid & PNG_INFO_sBIT) is non-zero.
|
||||
*/
|
||||
png_color_8 sig_bit; /* significant bits in color channels */
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
|
||||
defined(PNG_READ_BACKGROUND_SUPPORTED)
|
||||
/* The tRNS chunk supplies transparency data for paletted images and
|
||||
* other image types that don't need a full alpha channel. There are
|
||||
* "num_trans" transparency values for a paletted image, stored in the
|
||||
* same order as the palette colors, starting from index 0. Values
|
||||
* for the data are in the range [0, 255], ranging from fully transparent
|
||||
* to fully opaque, respectively. For non-paletted images, there is a
|
||||
* single color specified that should be treated as fully transparent.
|
||||
* Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
|
||||
*/
|
||||
png_bytep trans_alpha; /* alpha values for paletted image */
|
||||
png_color_16 trans_color; /* transparent color for non-palette image */
|
||||
#endif
|
||||
|
||||
#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
|
||||
/* The bKGD chunk gives the suggested image background color if the
|
||||
* display program does not have its own background color and the image
|
||||
* is needs to composited onto a background before display. The colors
|
||||
* in "background" are normally in the same color space/depth as the
|
||||
* pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
|
||||
*/
|
||||
png_color_16 background;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_oFFs_SUPPORTED
|
||||
/* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
|
||||
* and downwards from the top-left corner of the display, page, or other
|
||||
* application-specific co-ordinate space. See the PNG_OFFSET_ defines
|
||||
* below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero.
|
||||
*/
|
||||
png_int_32 x_offset; /* x offset on page */
|
||||
png_int_32 y_offset; /* y offset on page */
|
||||
png_byte offset_unit_type; /* offset units type */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_pHYs_SUPPORTED
|
||||
/* The pHYs chunk gives the physical pixel density of the image for
|
||||
* display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
|
||||
* defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
|
||||
*/
|
||||
png_uint_32 x_pixels_per_unit; /* horizontal pixel density */
|
||||
png_uint_32 y_pixels_per_unit; /* vertical pixel density */
|
||||
png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_hIST_SUPPORTED
|
||||
/* The hIST chunk contains the relative frequency or importance of the
|
||||
* various palette entries, so that a viewer can intelligently select a
|
||||
* reduced-color palette, if required. Data is an array of "num_palette"
|
||||
* values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST)
|
||||
* is non-zero.
|
||||
*/
|
||||
png_uint_16p hist;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_pCAL_SUPPORTED
|
||||
/* The pCAL chunk describes a transformation between the stored pixel
|
||||
* values and original physical data values used to create the image.
|
||||
* The integer range [0, 2^bit_depth - 1] maps to the floating-point
|
||||
* range given by [pcal_X0, pcal_X1], and are further transformed by a
|
||||
* (possibly non-linear) transformation function given by "pcal_type"
|
||||
* and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_
|
||||
* defines below, and the PNG-Group's PNG extensions document for a
|
||||
* complete description of the transformations and how they should be
|
||||
* implemented, and for a description of the ASCII parameter strings.
|
||||
* Data values are valid if (valid & PNG_INFO_pCAL) non-zero.
|
||||
*/
|
||||
png_charp pcal_purpose; /* pCAL chunk description string */
|
||||
png_int_32 pcal_X0; /* minimum value */
|
||||
png_int_32 pcal_X1; /* maximum value */
|
||||
png_charp pcal_units; /* Latin-1 string giving physical units */
|
||||
png_charpp pcal_params; /* ASCII strings containing parameter values */
|
||||
png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */
|
||||
png_byte pcal_nparams; /* number of parameters given in pcal_params */
|
||||
#endif
|
||||
|
||||
/* New members added in libpng-1.0.6 */
|
||||
png_uint_32 free_me; /* flags items libpng is responsible for freeing */
|
||||
|
||||
#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
|
||||
/* Storage for unknown chunks that the library doesn't recognize. */
|
||||
png_unknown_chunkp unknown_chunks;
|
||||
|
||||
/* The type of this field is limited by the type of
|
||||
* png_struct::user_chunk_cache_max, else overflow can occur.
|
||||
*/
|
||||
int unknown_chunks_num;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_sPLT_SUPPORTED
|
||||
/* Data on sPLT chunks (there may be more than one). */
|
||||
png_sPLT_tp splt_palettes;
|
||||
int splt_palettes_num; /* Match type returned by png_get API */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_sCAL_SUPPORTED
|
||||
/* The sCAL chunk describes the actual physical dimensions of the
|
||||
* subject matter of the graphic. The chunk contains a unit specification
|
||||
* a byte value, and two ASCII strings representing floating-point
|
||||
* values. The values are width and height corresponsing to one pixel
|
||||
* in the image. Data values are valid if (valid & PNG_INFO_sCAL) is
|
||||
* non-zero.
|
||||
*/
|
||||
png_byte scal_unit; /* unit of physical scale */
|
||||
png_charp scal_s_width; /* string containing height */
|
||||
png_charp scal_s_height; /* string containing width */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_INFO_IMAGE_SUPPORTED
|
||||
/* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS)
|
||||
non-zero */
|
||||
/* Data valid if (valid & PNG_INFO_IDAT) non-zero */
|
||||
png_bytepp row_pointers; /* the image bits */
|
||||
#endif
|
||||
|
||||
};
|
||||
#endif /* PNGINFO_H */
|
||||
@ -1,209 +0,0 @@
|
||||
/* pnglibconf.h - library build configuration */
|
||||
|
||||
/* libpng version 1.6.5 - September 14, 2013 */
|
||||
|
||||
/* Copyright (c) 1998-2012 Glenn Randers-Pehrson */
|
||||
|
||||
/* This code is released under the libpng license. */
|
||||
/* For conditions of distribution and use, see the disclaimer */
|
||||
/* and license in png.h */
|
||||
|
||||
/* pnglibconf.h */
|
||||
/* Machine generated file: DO NOT EDIT */
|
||||
/* Derived from: scripts/pnglibconf.dfa */
|
||||
#ifndef PNGLCONF_H
|
||||
#define PNGLCONF_H
|
||||
/* options */
|
||||
#define PNG_16BIT_SUPPORTED
|
||||
#define PNG_ALIGNED_MEMORY_SUPPORTED
|
||||
/*#undef PNG_ARM_NEON_API_SUPPORTED*/
|
||||
/*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/
|
||||
#define PNG_BENIGN_ERRORS_SUPPORTED
|
||||
#define PNG_BENIGN_READ_ERRORS_SUPPORTED
|
||||
/*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/
|
||||
#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
|
||||
#define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
|
||||
#define PNG_COLORSPACE_SUPPORTED
|
||||
#define PNG_CONSOLE_IO_SUPPORTED
|
||||
#define PNG_CONVERT_tIME_SUPPORTED
|
||||
#define PNG_EASY_ACCESS_SUPPORTED
|
||||
/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/
|
||||
#define PNG_ERROR_TEXT_SUPPORTED
|
||||
#define PNG_FIXED_POINT_SUPPORTED
|
||||
#define PNG_FLOATING_ARITHMETIC_SUPPORTED
|
||||
#define PNG_FLOATING_POINT_SUPPORTED
|
||||
#define PNG_FORMAT_AFIRST_SUPPORTED
|
||||
#define PNG_FORMAT_BGR_SUPPORTED
|
||||
#define PNG_GAMMA_SUPPORTED
|
||||
#define PNG_GET_PALETTE_MAX_SUPPORTED
|
||||
#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
|
||||
#define PNG_INCH_CONVERSIONS_SUPPORTED
|
||||
#define PNG_INFO_IMAGE_SUPPORTED
|
||||
#define PNG_IO_STATE_SUPPORTED
|
||||
#define PNG_MNG_FEATURES_SUPPORTED
|
||||
#define PNG_POINTER_INDEXING_SUPPORTED
|
||||
#define PNG_PROGRESSIVE_READ_SUPPORTED
|
||||
#define PNG_READ_16BIT_SUPPORTED
|
||||
#define PNG_READ_ALPHA_MODE_SUPPORTED
|
||||
#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
|
||||
#define PNG_READ_BACKGROUND_SUPPORTED
|
||||
#define PNG_READ_BGR_SUPPORTED
|
||||
#define PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
|
||||
#define PNG_READ_COMPOSITE_NODIV_SUPPORTED
|
||||
#define PNG_READ_COMPRESSED_TEXT_SUPPORTED
|
||||
#define PNG_READ_EXPAND_16_SUPPORTED
|
||||
#define PNG_READ_EXPAND_SUPPORTED
|
||||
#define PNG_READ_FILLER_SUPPORTED
|
||||
#define PNG_READ_GAMMA_SUPPORTED
|
||||
#define PNG_READ_GET_PALETTE_MAX_SUPPORTED
|
||||
#define PNG_READ_GRAY_TO_RGB_SUPPORTED
|
||||
#define PNG_READ_INTERLACING_SUPPORTED
|
||||
#define PNG_READ_INT_FUNCTIONS_SUPPORTED
|
||||
#define PNG_READ_INVERT_ALPHA_SUPPORTED
|
||||
#define PNG_READ_INVERT_SUPPORTED
|
||||
#define PNG_READ_OPT_PLTE_SUPPORTED
|
||||
#define PNG_READ_PACKSWAP_SUPPORTED
|
||||
#define PNG_READ_PACK_SUPPORTED
|
||||
#define PNG_READ_QUANTIZE_SUPPORTED
|
||||
#define PNG_READ_RGB_TO_GRAY_SUPPORTED
|
||||
#define PNG_READ_SCALE_16_TO_8_SUPPORTED
|
||||
#define PNG_READ_SHIFT_SUPPORTED
|
||||
#define PNG_READ_STRIP_16_TO_8_SUPPORTED
|
||||
#define PNG_READ_STRIP_ALPHA_SUPPORTED
|
||||
#define PNG_READ_SUPPORTED
|
||||
#define PNG_READ_SWAP_ALPHA_SUPPORTED
|
||||
#define PNG_READ_SWAP_SUPPORTED
|
||||
#define PNG_READ_TEXT_SUPPORTED
|
||||
#define PNG_READ_TRANSFORMS_SUPPORTED
|
||||
#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
|
||||
#define PNG_READ_USER_CHUNKS_SUPPORTED
|
||||
#define PNG_READ_USER_TRANSFORM_SUPPORTED
|
||||
#define PNG_READ_bKGD_SUPPORTED
|
||||
#define PNG_READ_cHRM_SUPPORTED
|
||||
#define PNG_READ_gAMA_SUPPORTED
|
||||
#define PNG_READ_hIST_SUPPORTED
|
||||
#define PNG_READ_iCCP_SUPPORTED
|
||||
#define PNG_READ_iTXt_SUPPORTED
|
||||
#define PNG_READ_oFFs_SUPPORTED
|
||||
#define PNG_READ_pCAL_SUPPORTED
|
||||
#define PNG_READ_pHYs_SUPPORTED
|
||||
#define PNG_READ_sBIT_SUPPORTED
|
||||
#define PNG_READ_sCAL_SUPPORTED
|
||||
#define PNG_READ_sPLT_SUPPORTED
|
||||
#define PNG_READ_sRGB_SUPPORTED
|
||||
#define PNG_READ_tEXt_SUPPORTED
|
||||
#define PNG_READ_tIME_SUPPORTED
|
||||
#define PNG_READ_tRNS_SUPPORTED
|
||||
#define PNG_READ_zTXt_SUPPORTED
|
||||
/*#undef PNG_SAFE_LIMITS_SUPPORTED*/
|
||||
#define PNG_SAVE_INT_32_SUPPORTED
|
||||
#define PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
|
||||
#define PNG_SEQUENTIAL_READ_SUPPORTED
|
||||
#define PNG_SETJMP_SUPPORTED
|
||||
#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
|
||||
#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
|
||||
#define PNG_SET_OPTION_SUPPORTED
|
||||
#define PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
|
||||
#define PNG_SET_USER_LIMITS_SUPPORTED
|
||||
#define PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED
|
||||
#define PNG_SIMPLIFIED_READ_BGR_SUPPORTED
|
||||
#define PNG_SIMPLIFIED_READ_SUPPORTED
|
||||
#define PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
|
||||
#define PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED
|
||||
#define PNG_SIMPLIFIED_WRITE_SUPPORTED
|
||||
#define PNG_STDIO_SUPPORTED
|
||||
#define PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
|
||||
#define PNG_TEXT_SUPPORTED
|
||||
#define PNG_TIME_RFC1123_SUPPORTED
|
||||
#define PNG_UNKNOWN_CHUNKS_SUPPORTED
|
||||
#define PNG_USER_CHUNKS_SUPPORTED
|
||||
#define PNG_USER_LIMITS_SUPPORTED
|
||||
#define PNG_USER_MEM_SUPPORTED
|
||||
#define PNG_USER_TRANSFORM_INFO_SUPPORTED
|
||||
#define PNG_USER_TRANSFORM_PTR_SUPPORTED
|
||||
#define PNG_WARNINGS_SUPPORTED
|
||||
#define PNG_WRITE_16BIT_SUPPORTED
|
||||
#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
|
||||
#define PNG_WRITE_BGR_SUPPORTED
|
||||
#define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
|
||||
#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
|
||||
#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
|
||||
#define PNG_WRITE_FILLER_SUPPORTED
|
||||
#define PNG_WRITE_FILTER_SUPPORTED
|
||||
#define PNG_WRITE_FLUSH_SUPPORTED
|
||||
#define PNG_WRITE_GET_PALETTE_MAX_SUPPORTED
|
||||
#define PNG_WRITE_INTERLACING_SUPPORTED
|
||||
#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
|
||||
#define PNG_WRITE_INVERT_ALPHA_SUPPORTED
|
||||
#define PNG_WRITE_INVERT_SUPPORTED
|
||||
#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
|
||||
#define PNG_WRITE_PACKSWAP_SUPPORTED
|
||||
#define PNG_WRITE_PACK_SUPPORTED
|
||||
#define PNG_WRITE_SHIFT_SUPPORTED
|
||||
#define PNG_WRITE_SUPPORTED
|
||||
#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
|
||||
#define PNG_WRITE_SWAP_SUPPORTED
|
||||
#define PNG_WRITE_TEXT_SUPPORTED
|
||||
#define PNG_WRITE_TRANSFORMS_SUPPORTED
|
||||
#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
|
||||
#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
|
||||
#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
|
||||
#define PNG_WRITE_bKGD_SUPPORTED
|
||||
#define PNG_WRITE_cHRM_SUPPORTED
|
||||
#define PNG_WRITE_gAMA_SUPPORTED
|
||||
#define PNG_WRITE_hIST_SUPPORTED
|
||||
#define PNG_WRITE_iCCP_SUPPORTED
|
||||
#define PNG_WRITE_iTXt_SUPPORTED
|
||||
#define PNG_WRITE_oFFs_SUPPORTED
|
||||
#define PNG_WRITE_pCAL_SUPPORTED
|
||||
#define PNG_WRITE_pHYs_SUPPORTED
|
||||
#define PNG_WRITE_sBIT_SUPPORTED
|
||||
#define PNG_WRITE_sCAL_SUPPORTED
|
||||
#define PNG_WRITE_sPLT_SUPPORTED
|
||||
#define PNG_WRITE_sRGB_SUPPORTED
|
||||
#define PNG_WRITE_tEXt_SUPPORTED
|
||||
#define PNG_WRITE_tIME_SUPPORTED
|
||||
#define PNG_WRITE_tRNS_SUPPORTED
|
||||
#define PNG_WRITE_zTXt_SUPPORTED
|
||||
#define PNG_bKGD_SUPPORTED
|
||||
#define PNG_cHRM_SUPPORTED
|
||||
#define PNG_gAMA_SUPPORTED
|
||||
#define PNG_hIST_SUPPORTED
|
||||
#define PNG_iCCP_SUPPORTED
|
||||
#define PNG_iTXt_SUPPORTED
|
||||
#define PNG_oFFs_SUPPORTED
|
||||
#define PNG_pCAL_SUPPORTED
|
||||
#define PNG_pHYs_SUPPORTED
|
||||
#define PNG_sBIT_SUPPORTED
|
||||
#define PNG_sCAL_SUPPORTED
|
||||
#define PNG_sPLT_SUPPORTED
|
||||
#define PNG_sRGB_SUPPORTED
|
||||
#define PNG_tEXt_SUPPORTED
|
||||
#define PNG_tIME_SUPPORTED
|
||||
#define PNG_tRNS_SUPPORTED
|
||||
#define PNG_zTXt_SUPPORTED
|
||||
/* end of options */
|
||||
/* settings */
|
||||
#define PNG_API_RULE 0
|
||||
#define PNG_CALLOC_SUPPORTED
|
||||
#define PNG_COST_SHIFT 3
|
||||
#define PNG_DEFAULT_READ_MACROS 1
|
||||
#define PNG_GAMMA_THRESHOLD_FIXED 5000
|
||||
#define PNG_IDAT_READ_SIZE PNG_ZBUF_SIZE
|
||||
#define PNG_INFLATE_BUF_SIZE 1024
|
||||
#define PNG_MAX_GAMMA_8 11
|
||||
#define PNG_QUANTIZE_BLUE_BITS 5
|
||||
#define PNG_QUANTIZE_GREEN_BITS 5
|
||||
#define PNG_QUANTIZE_RED_BITS 5
|
||||
#define PNG_TEXT_Z_DEFAULT_COMPRESSION (-1)
|
||||
#define PNG_TEXT_Z_DEFAULT_STRATEGY 0
|
||||
#define PNG_WEIGHT_SHIFT 8
|
||||
#define PNG_ZBUF_SIZE 8192
|
||||
#define PNG_ZLIB_VERNUM 0x1280
|
||||
#define PNG_Z_DEFAULT_COMPRESSION (-1)
|
||||
#define PNG_Z_DEFAULT_NOFILTER_STRATEGY 0
|
||||
#define PNG_Z_DEFAULT_STRATEGY 1
|
||||
#define PNG_sCAL_PRECISION 5
|
||||
#define PNG_sRGB_PROFILE_CHECKS 2
|
||||
/* end of settings */
|
||||
#endif /* PNGLCONF_H */
|
||||
@ -1,277 +0,0 @@
|
||||
|
||||
/* pngmem.c - stub functions for memory allocation
|
||||
*
|
||||
* Last changed in libpng 1.6.0 [February 14, 2013]
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*
|
||||
* This file provides a location for all memory allocation. Users who
|
||||
* need special memory handling are expected to supply replacement
|
||||
* functions for png_malloc() and png_free(), and to use
|
||||
* png_create_read_struct_2() and png_create_write_struct_2() to
|
||||
* identify the replacement functions.
|
||||
*/
|
||||
|
||||
#include "pngpriv.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
/* Free a png_struct */
|
||||
void /* PRIVATE */
|
||||
png_destroy_png_struct(png_structrp png_ptr)
|
||||
{
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
/* png_free might call png_error and may certainly call
|
||||
* png_get_mem_ptr, so fake a temporary png_struct to support this.
|
||||
*/
|
||||
png_struct dummy_struct = *png_ptr;
|
||||
memset(png_ptr, 0, (sizeof *png_ptr));
|
||||
png_free(&dummy_struct, png_ptr);
|
||||
|
||||
# ifdef PNG_SETJMP_SUPPORTED
|
||||
/* We may have a jmp_buf left to deallocate. */
|
||||
png_free_jmpbuf(&dummy_struct);
|
||||
# endif
|
||||
}
|
||||
}
|
||||
|
||||
/* Allocate memory. For reasonable files, size should never exceed
|
||||
* 64K. However, zlib may allocate more then 64K if you don't tell
|
||||
* it not to. See zconf.h and png.h for more information. zlib does
|
||||
* need to allocate exactly 64K, so whatever you call here must
|
||||
* have the ability to do that.
|
||||
*/
|
||||
PNG_FUNCTION(png_voidp,PNGAPI
|
||||
png_calloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
|
||||
{
|
||||
png_voidp ret;
|
||||
|
||||
ret = png_malloc(png_ptr, size);
|
||||
|
||||
if (ret != NULL)
|
||||
memset(ret, 0, size);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* png_malloc_base, an internal function added at libpng 1.6.0, does the work of
|
||||
* allocating memory, taking into account limits and PNG_USER_MEM_SUPPORTED.
|
||||
* Checking and error handling must happen outside this routine; it returns NULL
|
||||
* if the allocation cannot be done (for any reason.)
|
||||
*/
|
||||
PNG_FUNCTION(png_voidp /* PRIVATE */,
|
||||
png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
|
||||
PNG_ALLOCATED)
|
||||
{
|
||||
/* Moved to png_malloc_base from png_malloc_default in 1.6.0; the DOS
|
||||
* allocators have also been removed in 1.6.0, so any 16-bit system now has
|
||||
* to implement a user memory handler. This checks to be sure it isn't
|
||||
* called with big numbers.
|
||||
*/
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
PNG_UNUSED(png_ptr)
|
||||
#endif
|
||||
if (size > 0 && size <= PNG_SIZE_MAX
|
||||
# ifdef PNG_MAX_MALLOC_64K
|
||||
&& size <= 65536U
|
||||
# endif
|
||||
)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if (png_ptr != NULL && png_ptr->malloc_fn != NULL)
|
||||
return png_ptr->malloc_fn(png_constcast(png_structrp,png_ptr), size);
|
||||
|
||||
else
|
||||
#endif
|
||||
return malloc((size_t)size); /* checked for truncation above */
|
||||
}
|
||||
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* This is really here only to work round a spurious warning in GCC 4.6 and 4.7
|
||||
* that arises because of the checks in png_realloc_array that are repeated in
|
||||
* png_malloc_array.
|
||||
*/
|
||||
static png_voidp
|
||||
png_malloc_array_checked(png_const_structrp png_ptr, int nelements,
|
||||
size_t element_size)
|
||||
{
|
||||
png_alloc_size_t req = nelements; /* known to be > 0 */
|
||||
|
||||
if (req <= PNG_SIZE_MAX/element_size)
|
||||
return png_malloc_base(png_ptr, req * element_size);
|
||||
|
||||
/* The failure case when the request is too large */
|
||||
return NULL;
|
||||
}
|
||||
|
||||
PNG_FUNCTION(png_voidp /* PRIVATE */,
|
||||
png_malloc_array,(png_const_structrp png_ptr, int nelements,
|
||||
size_t element_size),PNG_ALLOCATED)
|
||||
{
|
||||
if (nelements <= 0 || element_size == 0)
|
||||
png_error(png_ptr, "internal error: array alloc");
|
||||
|
||||
return png_malloc_array_checked(png_ptr, nelements, element_size);
|
||||
}
|
||||
|
||||
PNG_FUNCTION(png_voidp /* PRIVATE */,
|
||||
png_realloc_array,(png_const_structrp png_ptr, png_const_voidp old_array,
|
||||
int old_elements, int add_elements, size_t element_size),PNG_ALLOCATED)
|
||||
{
|
||||
/* These are internal errors: */
|
||||
if (add_elements <= 0 || element_size == 0 || old_elements < 0 ||
|
||||
(old_array == NULL && old_elements > 0))
|
||||
png_error(png_ptr, "internal error: array realloc");
|
||||
|
||||
/* Check for overflow on the elements count (so the caller does not have to
|
||||
* check.)
|
||||
*/
|
||||
if (add_elements <= INT_MAX - old_elements)
|
||||
{
|
||||
png_voidp new_array = png_malloc_array_checked(png_ptr,
|
||||
old_elements+add_elements, element_size);
|
||||
|
||||
if (new_array != NULL)
|
||||
{
|
||||
/* Because png_malloc_array worked the size calculations below cannot
|
||||
* overflow.
|
||||
*/
|
||||
if (old_elements > 0)
|
||||
memcpy(new_array, old_array, element_size*(unsigned)old_elements);
|
||||
|
||||
memset((char*)new_array + element_size*(unsigned)old_elements, 0,
|
||||
element_size*(unsigned)add_elements);
|
||||
|
||||
return new_array;
|
||||
}
|
||||
}
|
||||
|
||||
return NULL; /* error */
|
||||
}
|
||||
|
||||
/* Various functions that have different error handling are derived from this.
|
||||
* png_malloc always exists, but if PNG_USER_MEM_SUPPORTED is defined a separate
|
||||
* function png_malloc_default is also provided.
|
||||
*/
|
||||
PNG_FUNCTION(png_voidp,PNGAPI
|
||||
png_malloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
|
||||
{
|
||||
png_voidp ret;
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return NULL;
|
||||
|
||||
ret = png_malloc_base(png_ptr, size);
|
||||
|
||||
if (ret == NULL)
|
||||
png_error(png_ptr, "Out of memory"); /* 'm' means png_malloc */
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
PNG_FUNCTION(png_voidp,PNGAPI
|
||||
png_malloc_default,(png_const_structrp png_ptr, png_alloc_size_t size),
|
||||
PNG_ALLOCATED PNG_DEPRECATED)
|
||||
{
|
||||
png_voidp ret;
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return NULL;
|
||||
|
||||
/* Passing 'NULL' here bypasses the application provided memory handler. */
|
||||
ret = png_malloc_base(NULL/*use malloc*/, size);
|
||||
|
||||
if (ret == NULL)
|
||||
png_error(png_ptr, "Out of Memory"); /* 'M' means png_malloc_default */
|
||||
|
||||
return ret;
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
/* This function was added at libpng version 1.2.3. The png_malloc_warn()
|
||||
* function will issue a png_warning and return NULL instead of issuing a
|
||||
* png_error, if it fails to allocate the requested memory.
|
||||
*/
|
||||
PNG_FUNCTION(png_voidp,PNGAPI
|
||||
png_malloc_warn,(png_const_structrp png_ptr, png_alloc_size_t size),
|
||||
PNG_ALLOCATED)
|
||||
{
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
png_voidp ret = png_malloc_base(png_ptr, size);
|
||||
|
||||
if (ret != NULL)
|
||||
return ret;
|
||||
|
||||
png_warning(png_ptr, "Out of memory");
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Free a pointer allocated by png_malloc(). If ptr is NULL, return
|
||||
* without taking any action.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_free(png_const_structrp png_ptr, png_voidp ptr)
|
||||
{
|
||||
if (png_ptr == NULL || ptr == NULL)
|
||||
return;
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if (png_ptr->free_fn != NULL)
|
||||
png_ptr->free_fn(png_constcast(png_structrp,png_ptr), ptr);
|
||||
|
||||
else
|
||||
png_free_default(png_ptr, ptr);
|
||||
}
|
||||
|
||||
PNG_FUNCTION(void,PNGAPI
|
||||
png_free_default,(png_const_structrp png_ptr, png_voidp ptr),PNG_DEPRECATED)
|
||||
{
|
||||
if (png_ptr == NULL || ptr == NULL)
|
||||
return;
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
free(ptr);
|
||||
}
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
/* This function is called when the application wants to use another method
|
||||
* of allocating and freeing memory.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_mem_fn(png_structrp png_ptr, png_voidp mem_ptr, png_malloc_ptr
|
||||
malloc_fn, png_free_ptr free_fn)
|
||||
{
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
png_ptr->mem_ptr = mem_ptr;
|
||||
png_ptr->malloc_fn = malloc_fn;
|
||||
png_ptr->free_fn = free_fn;
|
||||
}
|
||||
}
|
||||
|
||||
/* This function returns a pointer to the mem_ptr associated with the user
|
||||
* functions. The application should free any memory associated with this
|
||||
* pointer before png_write_destroy and png_read_destroy are called.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_mem_ptr(png_const_structrp png_ptr)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return NULL;
|
||||
|
||||
return png_ptr->mem_ptr;
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@ -1,118 +0,0 @@
|
||||
|
||||
/* pngrio.c - functions for data input
|
||||
*
|
||||
* Last changed in libpng 1.6.0 [February 14, 2013]
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*
|
||||
* This file provides a location for all input. Users who need
|
||||
* special handling are expected to write a function that has the same
|
||||
* arguments as this and performs a similar function, but that possibly
|
||||
* has a different input method. Note that you shouldn't change this
|
||||
* function, but rather write a replacement function and then make
|
||||
* libpng use it at run time with png_set_read_fn(...).
|
||||
*/
|
||||
|
||||
#include "pngpriv.h"
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
|
||||
/* Read the data from whatever input you are using. The default routine
|
||||
* reads from a file pointer. Note that this routine sometimes gets called
|
||||
* with very small lengths, so you should implement some kind of simple
|
||||
* buffering if you are using unbuffered reads. This should never be asked
|
||||
* to read more then 64K on a 16 bit machine.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_read_data(png_structrp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_debug1(4, "reading %d bytes", (int)length);
|
||||
|
||||
if (png_ptr->read_data_fn != NULL)
|
||||
(*(png_ptr->read_data_fn))(png_ptr, data, length);
|
||||
|
||||
else
|
||||
png_error(png_ptr, "Call to NULL read function");
|
||||
}
|
||||
|
||||
#ifdef PNG_STDIO_SUPPORTED
|
||||
/* This is the function that does the actual reading of data. If you are
|
||||
* not reading from a standard C stream, you should create a replacement
|
||||
* read_data function and use it at run time with png_set_read_fn(), rather
|
||||
* than changing the library.
|
||||
*/
|
||||
void PNGCBAPI
|
||||
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_size_t check;
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
|
||||
* instead of an int, which is what fread() actually returns.
|
||||
*/
|
||||
check = fread(data, 1, length, png_voidcast(png_FILE_p, png_ptr->io_ptr));
|
||||
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Read Error");
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This function allows the application to supply a new input function
|
||||
* for libpng if standard C streams aren't being used.
|
||||
*
|
||||
* This function takes as its arguments:
|
||||
*
|
||||
* png_ptr - pointer to a png input data structure
|
||||
*
|
||||
* io_ptr - pointer to user supplied structure containing info about
|
||||
* the input functions. May be NULL.
|
||||
*
|
||||
* read_data_fn - pointer to a new input function that takes as its
|
||||
* arguments a pointer to a png_struct, a pointer to
|
||||
* a location where input data can be stored, and a 32-bit
|
||||
* unsigned int that is the number of bytes to be read.
|
||||
* To exit and output any fatal error messages the new write
|
||||
* function should call png_error(png_ptr, "Error msg").
|
||||
* May be NULL, in which case libpng's default function will
|
||||
* be used.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_read_fn(png_structrp png_ptr, png_voidp io_ptr,
|
||||
png_rw_ptr read_data_fn)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->io_ptr = io_ptr;
|
||||
|
||||
#ifdef PNG_STDIO_SUPPORTED
|
||||
if (read_data_fn != NULL)
|
||||
png_ptr->read_data_fn = read_data_fn;
|
||||
|
||||
else
|
||||
png_ptr->read_data_fn = png_default_read_data;
|
||||
#else
|
||||
png_ptr->read_data_fn = read_data_fn;
|
||||
#endif
|
||||
|
||||
/* It is an error to write to a read device */
|
||||
if (png_ptr->write_data_fn != NULL)
|
||||
{
|
||||
png_ptr->write_data_fn = NULL;
|
||||
png_warning(png_ptr,
|
||||
"Can't set both read_data_fn and write_data_fn in the"
|
||||
" same structure");
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_FLUSH_SUPPORTED
|
||||
png_ptr->output_flush_fn = NULL;
|
||||
#endif
|
||||
}
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@ -1,489 +0,0 @@
|
||||
|
||||
/* pngstruct.h - header file for PNG reference library
|
||||
*
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* Last changed in libpng 1.6.1 [March 28, 2013]
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
/* The structure that holds the information to read and write PNG files.
|
||||
* The only people who need to care about what is inside of this are the
|
||||
* people who will be modifying the library for their own special needs.
|
||||
* It should NOT be accessed directly by an application.
|
||||
*/
|
||||
|
||||
#ifndef PNGSTRUCT_H
|
||||
#define PNGSTRUCT_H
|
||||
/* zlib.h defines the structure z_stream, an instance of which is included
|
||||
* in this structure and is required for decompressing the LZ compressed
|
||||
* data in PNG files.
|
||||
*/
|
||||
#ifndef ZLIB_CONST
|
||||
/* We must ensure that zlib uses 'const' in declarations. */
|
||||
# define ZLIB_CONST
|
||||
#endif
|
||||
#include "zlib.h"
|
||||
#ifdef const
|
||||
/* zlib.h sometimes #defines const to nothing, undo this. */
|
||||
# undef const
|
||||
#endif
|
||||
|
||||
/* zlib.h has mediocre z_const use before 1.2.6, this stuff is for compatibility
|
||||
* with older builds.
|
||||
*/
|
||||
#if ZLIB_VERNUM < 0x1260
|
||||
# define PNGZ_MSG_CAST(s) png_constcast(char*,s)
|
||||
# define PNGZ_INPUT_CAST(b) png_constcast(png_bytep,b)
|
||||
#else
|
||||
# define PNGZ_MSG_CAST(s) (s)
|
||||
# define PNGZ_INPUT_CAST(b) (b)
|
||||
#endif
|
||||
|
||||
/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib
|
||||
* can handle at once. This type need be no larger than 16 bits (so maximum of
|
||||
* 65535), this define allows us to discover how big it is, but limited by the
|
||||
* maximuum for png_size_t. The value can be overriden in a library build
|
||||
* (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably
|
||||
* lower value (e.g. 255 works). A lower value may help memory usage (slightly)
|
||||
* and may even improve performance on some systems (and degrade it on others.)
|
||||
*/
|
||||
#ifndef ZLIB_IO_MAX
|
||||
# define ZLIB_IO_MAX ((uInt)-1)
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
/* The type of a compression buffer list used by the write code. */
|
||||
typedef struct png_compression_buffer
|
||||
{
|
||||
struct png_compression_buffer *next;
|
||||
png_byte output[1]; /* actually zbuf_size */
|
||||
} png_compression_buffer, *png_compression_bufferp;
|
||||
|
||||
#define PNG_COMPRESSION_BUFFER_SIZE(pp)\
|
||||
(offsetof(png_compression_buffer, output) + (pp)->zbuffer_size)
|
||||
#endif
|
||||
|
||||
/* Colorspace support; structures used in png_struct, png_info and in internal
|
||||
* functions to hold and communicate information about the color space.
|
||||
*
|
||||
* PNG_COLORSPACE_SUPPORTED is only required if the application will perform
|
||||
* colorspace corrections, otherwise all the colorspace information can be
|
||||
* skipped and the size of libpng can be reduced (significantly) by compiling
|
||||
* out the colorspace support.
|
||||
*/
|
||||
#ifdef PNG_COLORSPACE_SUPPORTED
|
||||
/* The chromaticities of the red, green and blue colorants and the chromaticity
|
||||
* of the corresponding white point (i.e. of rgb(1.0,1.0,1.0)).
|
||||
*/
|
||||
typedef struct png_xy
|
||||
{
|
||||
png_fixed_point redx, redy;
|
||||
png_fixed_point greenx, greeny;
|
||||
png_fixed_point bluex, bluey;
|
||||
png_fixed_point whitex, whitey;
|
||||
} png_xy;
|
||||
|
||||
/* The same data as above but encoded as CIE XYZ values. When this data comes
|
||||
* from chromaticities the sum of the Y values is assumed to be 1.0
|
||||
*/
|
||||
typedef struct png_XYZ
|
||||
{
|
||||
png_fixed_point red_X, red_Y, red_Z;
|
||||
png_fixed_point green_X, green_Y, green_Z;
|
||||
png_fixed_point blue_X, blue_Y, blue_Z;
|
||||
} png_XYZ;
|
||||
#endif /* COLORSPACE */
|
||||
|
||||
#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
|
||||
/* A colorspace is all the above plus, potentially, profile information,
|
||||
* however at present libpng does not use the profile internally so it is only
|
||||
* stored in the png_info struct (if iCCP is supported.) The rendering intent
|
||||
* is retained here and is checked.
|
||||
*
|
||||
* The file gamma encoding information is also stored here and gamma correction
|
||||
* is done by libpng, whereas color correction must currently be done by the
|
||||
* application.
|
||||
*/
|
||||
typedef struct png_colorspace
|
||||
{
|
||||
#ifdef PNG_GAMMA_SUPPORTED
|
||||
png_fixed_point gamma; /* File gamma */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_COLORSPACE_SUPPORTED
|
||||
png_xy end_points_xy; /* End points as chromaticities */
|
||||
png_XYZ end_points_XYZ; /* End points as CIE XYZ colorant values */
|
||||
png_uint_16 rendering_intent; /* Rendering intent of a profile */
|
||||
#endif
|
||||
|
||||
/* Flags are always defined to simplify the code. */
|
||||
png_uint_16 flags; /* As defined below */
|
||||
} png_colorspace, * PNG_RESTRICT png_colorspacerp;
|
||||
|
||||
typedef const png_colorspace * PNG_RESTRICT png_const_colorspacerp;
|
||||
|
||||
/* General flags for the 'flags' field */
|
||||
#define PNG_COLORSPACE_HAVE_GAMMA 0x0001
|
||||
#define PNG_COLORSPACE_HAVE_ENDPOINTS 0x0002
|
||||
#define PNG_COLORSPACE_HAVE_INTENT 0x0004
|
||||
#define PNG_COLORSPACE_FROM_gAMA 0x0008
|
||||
#define PNG_COLORSPACE_FROM_cHRM 0x0010
|
||||
#define PNG_COLORSPACE_FROM_sRGB 0x0020
|
||||
#define PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB 0x0040
|
||||
#define PNG_COLORSPACE_MATCHES_sRGB 0x0080 /* exact match on profile */
|
||||
#define PNG_COLORSPACE_INVALID 0x8000
|
||||
#define PNG_COLORSPACE_CANCEL(flags) (0xffff ^ (flags))
|
||||
#endif /* COLORSPACE || GAMMA */
|
||||
|
||||
struct png_struct_def
|
||||
{
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
jmp_buf jmp_buf_local; /* New name in 1.6.0 for jmp_buf in png_struct */
|
||||
png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */
|
||||
jmp_buf *jmp_buf_ptr; /* passed to longjmp_fn */
|
||||
size_t jmp_buf_size; /* size of the above, if allocated */
|
||||
#endif
|
||||
png_error_ptr error_fn; /* function for printing errors and aborting */
|
||||
#ifdef PNG_WARNINGS_SUPPORTED
|
||||
png_error_ptr warning_fn; /* function for printing warnings */
|
||||
#endif
|
||||
png_voidp error_ptr; /* user supplied struct for error functions */
|
||||
png_rw_ptr write_data_fn; /* function for writing output data */
|
||||
png_rw_ptr read_data_fn; /* function for reading input data */
|
||||
png_voidp io_ptr; /* ptr to application struct for I/O functions */
|
||||
|
||||
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
|
||||
png_user_transform_ptr read_user_transform_fn; /* user read transform */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
|
||||
png_user_transform_ptr write_user_transform_fn; /* user write transform */
|
||||
#endif
|
||||
|
||||
/* These were added in libpng-1.0.2 */
|
||||
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
|
||||
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
|
||||
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
|
||||
png_voidp user_transform_ptr; /* user supplied struct for user transform */
|
||||
png_byte user_transform_depth; /* bit depth of user transformed pixels */
|
||||
png_byte user_transform_channels; /* channels in user transformed pixels */
|
||||
#endif
|
||||
#endif
|
||||
|
||||
png_uint_32 mode; /* tells us where we are in the PNG file */
|
||||
png_uint_32 flags; /* flags indicating various things to libpng */
|
||||
png_uint_32 transformations; /* which transformations to perform */
|
||||
|
||||
png_uint_32 zowner; /* ID (chunk type) of zstream owner, 0 if none */
|
||||
z_stream zstream; /* decompression structure */
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
png_compression_bufferp zbuffer_list; /* Created on demand during write */
|
||||
uInt zbuffer_size; /* size of the actual buffer */
|
||||
|
||||
int zlib_level; /* holds zlib compression level */
|
||||
int zlib_method; /* holds zlib compression method */
|
||||
int zlib_window_bits; /* holds zlib compression window bits */
|
||||
int zlib_mem_level; /* holds zlib compression memory level */
|
||||
int zlib_strategy; /* holds zlib compression strategy */
|
||||
#endif
|
||||
/* Added at libpng 1.5.4 */
|
||||
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
|
||||
int zlib_text_level; /* holds zlib compression level */
|
||||
int zlib_text_method; /* holds zlib compression method */
|
||||
int zlib_text_window_bits; /* holds zlib compression window bits */
|
||||
int zlib_text_mem_level; /* holds zlib compression memory level */
|
||||
int zlib_text_strategy; /* holds zlib compression strategy */
|
||||
#endif
|
||||
/* End of material added at libpng 1.5.4 */
|
||||
/* Added at libpng 1.6.0 */
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
int zlib_set_level; /* Actual values set into the zstream on write */
|
||||
int zlib_set_method;
|
||||
int zlib_set_window_bits;
|
||||
int zlib_set_mem_level;
|
||||
int zlib_set_strategy;
|
||||
#endif
|
||||
|
||||
png_uint_32 width; /* width of image in pixels */
|
||||
png_uint_32 height; /* height of image in pixels */
|
||||
png_uint_32 num_rows; /* number of rows in current pass */
|
||||
png_uint_32 usr_width; /* width of row at start of write */
|
||||
png_size_t rowbytes; /* size of row in bytes */
|
||||
png_uint_32 iwidth; /* width of current interlaced row in pixels */
|
||||
png_uint_32 row_number; /* current row in interlace pass */
|
||||
png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */
|
||||
png_bytep prev_row; /* buffer to save previous (unfiltered) row.
|
||||
* This is a pointer into big_prev_row
|
||||
*/
|
||||
png_bytep row_buf; /* buffer to save current (unfiltered) row.
|
||||
* This is a pointer into big_row_buf
|
||||
*/
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
png_bytep sub_row; /* buffer to save "sub" row when filtering */
|
||||
png_bytep up_row; /* buffer to save "up" row when filtering */
|
||||
png_bytep avg_row; /* buffer to save "avg" row when filtering */
|
||||
png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
|
||||
#endif
|
||||
png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */
|
||||
|
||||
png_uint_32 idat_size; /* current IDAT size for read */
|
||||
png_uint_32 crc; /* current chunk CRC value */
|
||||
png_colorp palette; /* palette from the input file */
|
||||
png_uint_16 num_palette; /* number of color entries in palette */
|
||||
|
||||
/* Added at libpng-1.5.10 */
|
||||
#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
|
||||
int num_palette_max; /* maximum palette index found in IDAT */
|
||||
#endif
|
||||
|
||||
png_uint_16 num_trans; /* number of transparency values */
|
||||
png_byte compression; /* file compression type (always 0) */
|
||||
png_byte filter; /* file filter type (always 0) */
|
||||
png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
|
||||
png_byte pass; /* current interlace pass (0 - 6) */
|
||||
png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */
|
||||
png_byte color_type; /* color type of file */
|
||||
png_byte bit_depth; /* bit depth of file */
|
||||
png_byte usr_bit_depth; /* bit depth of users row: write only */
|
||||
png_byte pixel_depth; /* number of bits per pixel */
|
||||
png_byte channels; /* number of channels in file */
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
png_byte usr_channels; /* channels at start of write: write only */
|
||||
#endif
|
||||
png_byte sig_bytes; /* magic bytes read/written from start of file */
|
||||
png_byte maximum_pixel_depth;
|
||||
/* pixel depth used for the row buffers */
|
||||
png_byte transformed_pixel_depth;
|
||||
/* pixel depth after read/write transforms */
|
||||
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
|
||||
png_uint_16 filler; /* filler bytes for pixel expansion */
|
||||
#endif
|
||||
|
||||
#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
|
||||
defined(PNG_READ_ALPHA_MODE_SUPPORTED)
|
||||
png_byte background_gamma_type;
|
||||
png_fixed_point background_gamma;
|
||||
png_color_16 background; /* background color in screen gamma space */
|
||||
#ifdef PNG_READ_GAMMA_SUPPORTED
|
||||
png_color_16 background_1; /* background normalized to gamma 1.0 */
|
||||
#endif
|
||||
#endif /* PNG_bKGD_SUPPORTED */
|
||||
|
||||
#ifdef PNG_WRITE_FLUSH_SUPPORTED
|
||||
png_flush_ptr output_flush_fn; /* Function for flushing output */
|
||||
png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
|
||||
png_uint_32 flush_rows; /* number of rows written since last flush */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_READ_GAMMA_SUPPORTED
|
||||
int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */
|
||||
png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */
|
||||
|
||||
png_bytep gamma_table; /* gamma table for 8-bit depth files */
|
||||
png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
|
||||
#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
|
||||
defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
|
||||
defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
|
||||
png_bytep gamma_from_1; /* converts from 1.0 to screen */
|
||||
png_bytep gamma_to_1; /* converts from file to 1.0 */
|
||||
png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
|
||||
png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
|
||||
#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
|
||||
png_color_8 sig_bit; /* significant bits in each available channel */
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
|
||||
png_color_8 shift; /* shift for significant bit tranformation */
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
|
||||
|| defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
|
||||
png_bytep trans_alpha; /* alpha values for paletted files */
|
||||
png_color_16 trans_color; /* transparent color for non-paletted files */
|
||||
#endif
|
||||
|
||||
png_read_status_ptr read_row_fn; /* called after each row is decoded */
|
||||
png_write_status_ptr write_row_fn; /* called after each row is encoded */
|
||||
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
|
||||
png_progressive_info_ptr info_fn; /* called after header data fully read */
|
||||
png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */
|
||||
png_progressive_end_ptr end_fn; /* called after image is complete */
|
||||
png_bytep save_buffer_ptr; /* current location in save_buffer */
|
||||
png_bytep save_buffer; /* buffer for previously read data */
|
||||
png_bytep current_buffer_ptr; /* current location in current_buffer */
|
||||
png_bytep current_buffer; /* buffer for recently used data */
|
||||
png_uint_32 push_length; /* size of current input chunk */
|
||||
png_uint_32 skip_length; /* bytes to skip in input data */
|
||||
png_size_t save_buffer_size; /* amount of data now in save_buffer */
|
||||
png_size_t save_buffer_max; /* total size of save_buffer */
|
||||
png_size_t buffer_size; /* total amount of available input data */
|
||||
png_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 /* PNG_PROGRESSIVE_READ_SUPPORTED */
|
||||
|
||||
#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 */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
|
||||
png_byte heuristic_method; /* heuristic for row filter selection */
|
||||
png_byte num_prev_filters; /* number of weights for previous rows */
|
||||
png_bytep prev_filters; /* filter type(s) of previous row(s) */
|
||||
png_uint_16p filter_weights; /* weight(s) for previous line(s) */
|
||||
png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
|
||||
png_uint_16p filter_costs; /* relative filter calculation cost */
|
||||
png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
|
||||
#endif
|
||||
|
||||
/* Options */
|
||||
#ifdef PNG_SET_OPTION_SUPPORTED
|
||||
png_byte options; /* On/off state (up to 4 options) */
|
||||
#endif
|
||||
|
||||
#if PNG_LIBPNG_VER < 10700
|
||||
/* To do: remove this from libpng-1.7 */
|
||||
#ifdef PNG_TIME_RFC1123_SUPPORTED
|
||||
char time_buffer[29]; /* String to hold RFC 1123 time text */
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* New members added in libpng-1.0.6 */
|
||||
|
||||
png_uint_32 free_me; /* flags items libpng is responsible for freeing */
|
||||
|
||||
#ifdef PNG_USER_CHUNKS_SUPPORTED
|
||||
png_voidp user_chunk_ptr;
|
||||
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
|
||||
png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
|
||||
int unknown_default; /* As PNG_HANDLE_* */
|
||||
unsigned int num_chunk_list; /* Number of entries in the list */
|
||||
png_bytep chunk_list; /* List of png_byte[5]; the textual chunk name
|
||||
* followed by a PNG_HANDLE_* byte */
|
||||
#endif
|
||||
|
||||
/* New members added in libpng-1.0.3 */
|
||||
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
|
||||
png_byte rgb_to_gray_status;
|
||||
/* Added in libpng 1.5.5 to record setting of coefficients: */
|
||||
png_byte rgb_to_gray_coefficients_set;
|
||||
/* These were changed from png_byte in libpng-1.0.6 */
|
||||
png_uint_16 rgb_to_gray_red_coeff;
|
||||
png_uint_16 rgb_to_gray_green_coeff;
|
||||
/* deleted in 1.5.5: rgb_to_gray_blue_coeff; */
|
||||
#endif
|
||||
|
||||
/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
|
||||
#if defined(PNG_MNG_FEATURES_SUPPORTED)
|
||||
/* Changed from png_byte to png_uint_32 at version 1.2.0 */
|
||||
png_uint_32 mng_features_permitted;
|
||||
#endif
|
||||
|
||||
/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
|
||||
#ifdef PNG_MNG_FEATURES_SUPPORTED
|
||||
png_byte filter_type;
|
||||
#endif
|
||||
|
||||
/* New members added in libpng-1.2.0 */
|
||||
|
||||
/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_voidp mem_ptr; /* user supplied struct for mem functions */
|
||||
png_malloc_ptr malloc_fn; /* function for allocating memory */
|
||||
png_free_ptr free_fn; /* function for freeing memory */
|
||||
#endif
|
||||
|
||||
/* New member added in libpng-1.0.13 and 1.2.0 */
|
||||
png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
|
||||
|
||||
#ifdef PNG_READ_QUANTIZE_SUPPORTED
|
||||
/* The following three members were added at version 1.0.14 and 1.2.4 */
|
||||
png_bytep quantize_sort; /* working sort array */
|
||||
png_bytep index_to_palette; /* where the original index currently is
|
||||
in the palette */
|
||||
png_bytep palette_to_index; /* which original index points to this
|
||||
palette color */
|
||||
#endif
|
||||
|
||||
/* New members added in libpng-1.0.16 and 1.2.6 */
|
||||
png_byte compression_type;
|
||||
|
||||
#ifdef PNG_USER_LIMITS_SUPPORTED
|
||||
png_uint_32 user_width_max;
|
||||
png_uint_32 user_height_max;
|
||||
|
||||
/* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
|
||||
* chunks that can be stored (0 means unlimited).
|
||||
*/
|
||||
png_uint_32 user_chunk_cache_max;
|
||||
|
||||
/* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
|
||||
* can occupy when decompressed. 0 means unlimited.
|
||||
*/
|
||||
png_alloc_size_t user_chunk_malloc_max;
|
||||
#endif
|
||||
|
||||
/* New member added in libpng-1.0.25 and 1.2.17 */
|
||||
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
|
||||
/* Temporary storage for unknown chunk that the library doesn't recognize,
|
||||
* used while reading the chunk.
|
||||
*/
|
||||
png_unknown_chunk unknown_chunk;
|
||||
#endif
|
||||
|
||||
/* New member added in libpng-1.2.26 */
|
||||
png_size_t old_big_row_buf_size;
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
/* New member added in libpng-1.2.30 */
|
||||
png_bytep read_buffer; /* buffer for reading chunk data */
|
||||
png_alloc_size_t read_buffer_size; /* current size of the buffer */
|
||||
#endif
|
||||
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
|
||||
uInt IDAT_read_size; /* limit on read buffer size for IDAT */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_IO_STATE_SUPPORTED
|
||||
/* New member added in libpng-1.4.0 */
|
||||
png_uint_32 io_state;
|
||||
#endif
|
||||
|
||||
/* New member added in libpng-1.5.6 */
|
||||
png_bytep big_prev_row;
|
||||
|
||||
/* New member added in libpng-1.5.7 */
|
||||
void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
|
||||
png_bytep row, png_const_bytep prev_row);
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
|
||||
png_colorspace colorspace;
|
||||
#endif
|
||||
#endif
|
||||
};
|
||||
#endif /* PNGSTRUCT_H */
|
||||
@ -1,841 +0,0 @@
|
||||
|
||||
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
|
||||
*
|
||||
* Last changed in libpng 1.6.2 [April 25, 2013]
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
#include "pngpriv.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
|
||||
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
/* Turn on BGR-to-RGB mapping */
|
||||
void PNGAPI
|
||||
png_set_bgr(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_bgr");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->transformations |= PNG_BGR;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
|
||||
/* Turn on 16 bit byte swapping */
|
||||
void PNGAPI
|
||||
png_set_swap(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_swap");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
if (png_ptr->bit_depth == 16)
|
||||
png_ptr->transformations |= PNG_SWAP_BYTES;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
/* Turn on pixel packing */
|
||||
void PNGAPI
|
||||
png_set_packing(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_packing");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
if (png_ptr->bit_depth < 8)
|
||||
{
|
||||
png_ptr->transformations |= PNG_PACK;
|
||||
png_ptr->usr_bit_depth = 8;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
/* Turn on packed pixel swapping */
|
||||
void PNGAPI
|
||||
png_set_packswap(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_packswap");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
if (png_ptr->bit_depth < 8)
|
||||
png_ptr->transformations |= PNG_PACKSWAP;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_shift(png_structrp png_ptr, png_const_color_8p true_bits)
|
||||
{
|
||||
png_debug(1, "in png_set_shift");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->transformations |= PNG_SHIFT;
|
||||
png_ptr->shift = *true_bits;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
|
||||
defined(PNG_WRITE_INTERLACING_SUPPORTED)
|
||||
int PNGAPI
|
||||
png_set_interlace_handling(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_interlace handling");
|
||||
|
||||
if (png_ptr && png_ptr->interlaced)
|
||||
{
|
||||
png_ptr->transformations |= PNG_INTERLACE;
|
||||
return (7);
|
||||
}
|
||||
|
||||
return (1);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
|
||||
/* Add a filler byte on read, or remove a filler or alpha byte on write.
|
||||
* The filler type has changed in v0.95 to allow future 2-byte fillers
|
||||
* for 48-bit input data, as well as to avoid problems with some compilers
|
||||
* that don't like bytes as parameters.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_filler(png_structrp png_ptr, png_uint_32 filler, int filler_loc)
|
||||
{
|
||||
png_debug(1, "in png_set_filler");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
/* In libpng 1.6 it is possible to determine whether this is a read or write
|
||||
* operation and therefore to do more checking here for a valid call.
|
||||
*/
|
||||
if (png_ptr->mode & PNG_IS_READ_STRUCT)
|
||||
{
|
||||
# ifdef PNG_READ_FILLER_SUPPORTED
|
||||
/* On read png_set_filler is always valid, regardless of the base PNG
|
||||
* format, because other transformations can give a format where the
|
||||
* filler code can execute (basically an 8 or 16-bit component RGB or G
|
||||
* format.)
|
||||
*
|
||||
* NOTE: usr_channels is not used by the read code! (This has led to
|
||||
* confusion in the past.) The filler is only used in the read code.
|
||||
*/
|
||||
png_ptr->filler = (png_uint_16)filler;
|
||||
# else
|
||||
png_app_error(png_ptr, "png_set_filler not supported on read");
|
||||
PNG_UNUSED(filler) /* not used in the write case */
|
||||
return;
|
||||
# endif
|
||||
}
|
||||
|
||||
else /* write */
|
||||
{
|
||||
# ifdef PNG_WRITE_FILLER_SUPPORTED
|
||||
/* On write the usr_channels parameter must be set correctly at the
|
||||
* start to record the number of channels in the app-supplied data.
|
||||
*/
|
||||
switch (png_ptr->color_type)
|
||||
{
|
||||
case PNG_COLOR_TYPE_RGB:
|
||||
png_ptr->usr_channels = 4;
|
||||
break;
|
||||
|
||||
case PNG_COLOR_TYPE_GRAY:
|
||||
if (png_ptr->bit_depth >= 8)
|
||||
{
|
||||
png_ptr->usr_channels = 2;
|
||||
break;
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
/* There simply isn't any code in libpng to strip out bits
|
||||
* from bytes when the components are less than a byte in
|
||||
* size!
|
||||
*/
|
||||
png_app_error(png_ptr,
|
||||
"png_set_filler is invalid for low bit depth gray output");
|
||||
return;
|
||||
}
|
||||
|
||||
default:
|
||||
png_app_error(png_ptr,
|
||||
"png_set_filler: inappropriate color type");
|
||||
return;
|
||||
}
|
||||
# else
|
||||
png_app_error(png_ptr, "png_set_filler not supported on write");
|
||||
return;
|
||||
# endif
|
||||
}
|
||||
|
||||
/* Here on success - libpng supports the operation, set the transformation
|
||||
* and the flag to say where the filler channel is.
|
||||
*/
|
||||
png_ptr->transformations |= PNG_FILLER;
|
||||
|
||||
if (filler_loc == PNG_FILLER_AFTER)
|
||||
png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
|
||||
|
||||
else
|
||||
png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
|
||||
}
|
||||
|
||||
/* Added to libpng-1.2.7 */
|
||||
void PNGAPI
|
||||
png_set_add_alpha(png_structrp png_ptr, png_uint_32 filler, int filler_loc)
|
||||
{
|
||||
png_debug(1, "in png_set_add_alpha");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_set_filler(png_ptr, filler, filler_loc);
|
||||
/* The above may fail to do anything. */
|
||||
if (png_ptr->transformations & PNG_FILLER)
|
||||
png_ptr->transformations |= PNG_ADD_ALPHA;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
|
||||
defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_swap_alpha(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_swap_alpha");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->transformations |= PNG_SWAP_ALPHA;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
|
||||
defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_invert_alpha(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_invert_alpha");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->transformations |= PNG_INVERT_ALPHA;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_invert_mono(png_structrp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_invert_mono");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->transformations |= PNG_INVERT_MONO;
|
||||
}
|
||||
|
||||
/* Invert monochrome grayscale data */
|
||||
void /* PRIVATE */
|
||||
png_do_invert(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_invert");
|
||||
|
||||
/* This test removed from libpng version 1.0.13 and 1.2.0:
|
||||
* if (row_info->bit_depth == 1 &&
|
||||
*/
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_size_t i;
|
||||
png_size_t istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i++)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
rp++;
|
||||
}
|
||||
}
|
||||
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
|
||||
row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_size_t i;
|
||||
png_size_t istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i += 2)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
rp += 2;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_16BIT_SUPPORTED
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
|
||||
row_info->bit_depth == 16)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_size_t i;
|
||||
png_size_t istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i += 4)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
*(rp + 1) = (png_byte)(~(*(rp + 1)));
|
||||
rp += 4;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_16BIT_SUPPORTED
|
||||
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
|
||||
/* Swaps byte order on 16 bit depth images */
|
||||
void /* PRIVATE */
|
||||
png_do_swap(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_swap");
|
||||
|
||||
if (row_info->bit_depth == 16)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop= row_info->width * row_info->channels;
|
||||
|
||||
for (i = 0; i < istop; i++, rp += 2)
|
||||
{
|
||||
png_byte t = *rp;
|
||||
*rp = *(rp + 1);
|
||||
*(rp + 1) = t;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
static PNG_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,
|
||||
0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
|
||||
0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
|
||||
0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
|
||||
0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
|
||||
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
|
||||
0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
|
||||
0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
|
||||
0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
|
||||
0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
|
||||
0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
|
||||
0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
|
||||
0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
|
||||
0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
|
||||
0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
|
||||
0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
|
||||
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
|
||||
0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
|
||||
0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
|
||||
0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
|
||||
0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
|
||||
0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
|
||||
0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
|
||||
0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
|
||||
0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
|
||||
0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
|
||||
0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
|
||||
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
|
||||
0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
|
||||
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
|
||||
};
|
||||
|
||||
static PNG_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,
|
||||
0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4,
|
||||
0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8,
|
||||
0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8,
|
||||
0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC,
|
||||
0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC,
|
||||
0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1,
|
||||
0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1,
|
||||
0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5,
|
||||
0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5,
|
||||
0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9,
|
||||
0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9,
|
||||
0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD,
|
||||
0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD,
|
||||
0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2,
|
||||
0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2,
|
||||
0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6,
|
||||
0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6,
|
||||
0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA,
|
||||
0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA,
|
||||
0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE,
|
||||
0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE,
|
||||
0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3,
|
||||
0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3,
|
||||
0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7,
|
||||
0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7,
|
||||
0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB,
|
||||
0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB,
|
||||
0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF,
|
||||
0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
|
||||
};
|
||||
|
||||
static PNG_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,
|
||||
0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1,
|
||||
0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
|
||||
0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2,
|
||||
0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,
|
||||
0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3,
|
||||
0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,
|
||||
0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4,
|
||||
0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,
|
||||
0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5,
|
||||
0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,
|
||||
0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6,
|
||||
0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,
|
||||
0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7,
|
||||
0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,
|
||||
0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8,
|
||||
0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,
|
||||
0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9,
|
||||
0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A,
|
||||
0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA,
|
||||
0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B,
|
||||
0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB,
|
||||
0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C,
|
||||
0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC,
|
||||
0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D,
|
||||
0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD,
|
||||
0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E,
|
||||
0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE,
|
||||
0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F,
|
||||
0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
|
||||
};
|
||||
|
||||
/* Swaps pixel packing order within bytes */
|
||||
void /* PRIVATE */
|
||||
png_do_packswap(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_packswap");
|
||||
|
||||
if (row_info->bit_depth < 8)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_const_bytep end, table;
|
||||
|
||||
end = row + row_info->rowbytes;
|
||||
|
||||
if (row_info->bit_depth == 1)
|
||||
table = onebppswaptable;
|
||||
|
||||
else if (row_info->bit_depth == 2)
|
||||
table = twobppswaptable;
|
||||
|
||||
else if (row_info->bit_depth == 4)
|
||||
table = fourbppswaptable;
|
||||
|
||||
else
|
||||
return;
|
||||
|
||||
for (rp = row; rp < end; rp++)
|
||||
*rp = table[*rp];
|
||||
}
|
||||
}
|
||||
#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */
|
||||
|
||||
#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
|
||||
defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
|
||||
/* Remove a channel - this used to be 'png_do_strip_filler' but it used a
|
||||
* somewhat weird combination of flags to determine what to do. All the calls
|
||||
* to png_do_strip_filler are changed in 1.5.2 to call this instead with the
|
||||
* correct arguments.
|
||||
*
|
||||
* The routine isn't general - the channel must be the channel at the start or
|
||||
* end (not in the middle) of each pixel.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
|
||||
{
|
||||
png_bytep sp = row; /* source pointer */
|
||||
png_bytep dp = row; /* destination pointer */
|
||||
png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */
|
||||
|
||||
/* At the start sp will point to the first byte to copy and dp to where
|
||||
* it is copied to. ep always points just beyond the end of the row, so
|
||||
* the loop simply copies (channels-1) channels until sp reaches ep.
|
||||
*
|
||||
* at_start: 0 -- convert AG, XG, ARGB, XRGB, AAGG, XXGG, etc.
|
||||
* nonzero -- convert GA, GX, RGBA, RGBX, GGAA, RRGGBBXX, etc.
|
||||
*/
|
||||
|
||||
/* GA, GX, XG cases */
|
||||
if (row_info->channels == 2)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
if (at_start) /* Skip initial filler */
|
||||
++sp;
|
||||
else /* Skip initial channel and, for sp, the filler */
|
||||
sp += 2, ++dp;
|
||||
|
||||
/* For a 1 pixel wide image there is nothing to do */
|
||||
while (sp < ep)
|
||||
*dp++ = *sp, sp += 2;
|
||||
|
||||
row_info->pixel_depth = 8;
|
||||
}
|
||||
|
||||
else if (row_info->bit_depth == 16)
|
||||
{
|
||||
if (at_start) /* Skip initial filler */
|
||||
sp += 2;
|
||||
else /* Skip initial channel and, for sp, the filler */
|
||||
sp += 4, dp += 2;
|
||||
|
||||
while (sp < ep)
|
||||
*dp++ = *sp++, *dp++ = *sp, sp += 3;
|
||||
|
||||
row_info->pixel_depth = 16;
|
||||
}
|
||||
|
||||
else
|
||||
return; /* bad bit depth */
|
||||
|
||||
row_info->channels = 1;
|
||||
|
||||
/* Finally fix the color type if it records an alpha channel */
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
row_info->color_type = PNG_COLOR_TYPE_GRAY;
|
||||
}
|
||||
|
||||
/* RGBA, RGBX, XRGB cases */
|
||||
else if (row_info->channels == 4)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
if (at_start) /* Skip initial filler */
|
||||
++sp;
|
||||
else /* Skip initial channels and, for sp, the filler */
|
||||
sp += 4, dp += 3;
|
||||
|
||||
/* Note that the loop adds 3 to dp and 4 to sp each time. */
|
||||
while (sp < ep)
|
||||
*dp++ = *sp++, *dp++ = *sp++, *dp++ = *sp, sp += 2;
|
||||
|
||||
row_info->pixel_depth = 24;
|
||||
}
|
||||
|
||||
else if (row_info->bit_depth == 16)
|
||||
{
|
||||
if (at_start) /* Skip initial filler */
|
||||
sp += 2;
|
||||
else /* Skip initial channels and, for sp, the filler */
|
||||
sp += 8, dp += 6;
|
||||
|
||||
while (sp < ep)
|
||||
{
|
||||
/* Copy 6 bytes, skip 2 */
|
||||
*dp++ = *sp++, *dp++ = *sp++;
|
||||
*dp++ = *sp++, *dp++ = *sp++;
|
||||
*dp++ = *sp++, *dp++ = *sp, sp += 3;
|
||||
}
|
||||
|
||||
row_info->pixel_depth = 48;
|
||||
}
|
||||
|
||||
else
|
||||
return; /* bad bit depth */
|
||||
|
||||
row_info->channels = 3;
|
||||
|
||||
/* Finally fix the color type if it records an alpha channel */
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
row_info->color_type = PNG_COLOR_TYPE_RGB;
|
||||
}
|
||||
|
||||
else
|
||||
return; /* The filler channel has gone already */
|
||||
|
||||
/* Fix the rowbytes value. */
|
||||
row_info->rowbytes = dp-row;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
/* Swaps red and blue bytes within a pixel */
|
||||
void /* PRIVATE */
|
||||
png_do_bgr(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_bgr");
|
||||
|
||||
if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
|
||||
{
|
||||
png_uint_32 row_width = row_info->width;
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 3)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 2);
|
||||
*(rp + 2) = save;
|
||||
}
|
||||
}
|
||||
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 4)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 2);
|
||||
*(rp + 2) = save;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_16BIT_SUPPORTED
|
||||
else if (row_info->bit_depth == 16)
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 6)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 4);
|
||||
*(rp + 4) = save;
|
||||
save = *(rp + 1);
|
||||
*(rp + 1) = *(rp + 5);
|
||||
*(rp + 5) = save;
|
||||
}
|
||||
}
|
||||
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 8)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 4);
|
||||
*(rp + 4) = save;
|
||||
save = *(rp + 1);
|
||||
*(rp + 1) = *(rp + 5);
|
||||
*(rp + 5) = save;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
}
|
||||
}
|
||||
#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
|
||||
|
||||
#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \
|
||||
defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
|
||||
/* Added at libpng-1.5.10 */
|
||||
void /* PRIVATE */
|
||||
png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
|
||||
{
|
||||
if (png_ptr->num_palette < (1 << row_info->bit_depth) &&
|
||||
png_ptr->num_palette > 0) /* num_palette can be 0 in MNG files */
|
||||
{
|
||||
/* Calculations moved outside switch in an attempt to stop different
|
||||
* compiler warnings. 'padding' is in *bits* within the last byte, it is
|
||||
* an 'int' because pixel_depth becomes an 'int' in the expression below,
|
||||
* and this calculation is used because it avoids warnings that other
|
||||
* forms produced on either GCC or MSVC.
|
||||
*/
|
||||
int padding = (-row_info->pixel_depth * row_info->width) & 7;
|
||||
png_bytep rp = png_ptr->row_buf + row_info->rowbytes;
|
||||
|
||||
switch (row_info->bit_depth)
|
||||
{
|
||||
case 1:
|
||||
{
|
||||
/* in this case, all bytes must be 0 so we don't need
|
||||
* to unpack the pixels except for the rightmost one.
|
||||
*/
|
||||
for (; rp > png_ptr->row_buf; rp--)
|
||||
{
|
||||
if (*rp >> padding != 0)
|
||||
png_ptr->num_palette_max = 1;
|
||||
padding = 0;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case 2:
|
||||
{
|
||||
for (; rp > png_ptr->row_buf; rp--)
|
||||
{
|
||||
int i = ((*rp >> padding) & 0x03);
|
||||
|
||||
if (i > png_ptr->num_palette_max)
|
||||
png_ptr->num_palette_max = i;
|
||||
|
||||
i = (((*rp >> padding) >> 2) & 0x03);
|
||||
|
||||
if (i > png_ptr->num_palette_max)
|
||||
png_ptr->num_palette_max = i;
|
||||
|
||||
i = (((*rp >> padding) >> 4) & 0x03);
|
||||
|
||||
if (i > png_ptr->num_palette_max)
|
||||
png_ptr->num_palette_max = i;
|
||||
|
||||
i = (((*rp >> padding) >> 6) & 0x03);
|
||||
|
||||
if (i > png_ptr->num_palette_max)
|
||||
png_ptr->num_palette_max = i;
|
||||
|
||||
padding = 0;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case 4:
|
||||
{
|
||||
for (; rp > png_ptr->row_buf; rp--)
|
||||
{
|
||||
int i = ((*rp >> padding) & 0x0f);
|
||||
|
||||
if (i > png_ptr->num_palette_max)
|
||||
png_ptr->num_palette_max = i;
|
||||
|
||||
i = (((*rp >> padding) >> 4) & 0x0f);
|
||||
|
||||
if (i > png_ptr->num_palette_max)
|
||||
png_ptr->num_palette_max = i;
|
||||
|
||||
padding = 0;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case 8:
|
||||
{
|
||||
for (; rp > png_ptr->row_buf; rp--)
|
||||
{
|
||||
if (*rp > png_ptr->num_palette_max)
|
||||
png_ptr->num_palette_max = (int) *rp;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED */
|
||||
|
||||
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
|
||||
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
|
||||
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
|
||||
void PNGAPI
|
||||
png_set_user_transform_info(png_structrp png_ptr, png_voidp
|
||||
user_transform_ptr, int user_transform_depth, int user_transform_channels)
|
||||
{
|
||||
png_debug(1, "in png_set_user_transform_info");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
|
||||
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 &&
|
||||
(png_ptr->flags & PNG_FLAG_ROW_INIT) != 0)
|
||||
{
|
||||
png_app_error(png_ptr,
|
||||
"info change after png_start_read_image or png_read_update_info");
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
png_ptr->user_transform_ptr = user_transform_ptr;
|
||||
png_ptr->user_transform_depth = (png_byte)user_transform_depth;
|
||||
png_ptr->user_transform_channels = (png_byte)user_transform_channels;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This function returns a pointer to the user_transform_ptr associated with
|
||||
* the user transform functions. The application should free any memory
|
||||
* associated with this pointer before png_write_destroy and png_read_destroy
|
||||
* are called.
|
||||
*/
|
||||
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
|
||||
png_voidp PNGAPI
|
||||
png_get_user_transform_ptr(png_const_structrp png_ptr)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return (NULL);
|
||||
|
||||
return png_ptr->user_transform_ptr;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_current_row_number(png_const_structrp png_ptr)
|
||||
{
|
||||
/* See the comments in png.h - this is the sub-image row when reading and
|
||||
* interlaced image.
|
||||
*/
|
||||
if (png_ptr != NULL)
|
||||
return png_ptr->row_number;
|
||||
|
||||
return PNG_UINT_32_MAX; /* help the app not to fail silently */
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_current_pass_number(png_const_structrp png_ptr)
|
||||
{
|
||||
if (png_ptr != NULL)
|
||||
return png_ptr->pass;
|
||||
return 8; /* invalid */
|
||||
}
|
||||
#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */
|
||||
#endif /* PNG_READ_USER_TRANSFORM_SUPPORTED ||
|
||||
PNG_WRITE_USER_TRANSFORM_SUPPORTED */
|
||||
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
||||
@ -1,164 +0,0 @@
|
||||
|
||||
/* pngwio.c - functions for data output
|
||||
*
|
||||
* Last changed in libpng 1.6.0 [February 14, 2013]
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*
|
||||
* This file provides a location for all output. Users who need
|
||||
* special handling are expected to write functions that have the same
|
||||
* arguments as these and perform similar functions, but that possibly
|
||||
* use different output methods. Note that you shouldn't change these
|
||||
* functions, but rather write replacement functions and then change
|
||||
* them at run time with png_set_write_fn(...).
|
||||
*/
|
||||
|
||||
#include "pngpriv.h"
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
|
||||
/* Write the data to whatever output you are using. The default routine
|
||||
* writes to a file pointer. Note that this routine sometimes gets called
|
||||
* with very small lengths, so you should implement some kind of simple
|
||||
* buffering if you are using unbuffered writes. This should never be asked
|
||||
* to write more than 64K on a 16 bit machine.
|
||||
*/
|
||||
|
||||
void /* PRIVATE */
|
||||
png_write_data(png_structrp png_ptr, png_const_bytep data, png_size_t length)
|
||||
{
|
||||
/* NOTE: write_data_fn must not change the buffer! */
|
||||
if (png_ptr->write_data_fn != NULL )
|
||||
(*(png_ptr->write_data_fn))(png_ptr, png_constcast(png_bytep,data),
|
||||
length);
|
||||
|
||||
else
|
||||
png_error(png_ptr, "Call to NULL write function");
|
||||
}
|
||||
|
||||
#ifdef PNG_STDIO_SUPPORTED
|
||||
/* This is the function that does the actual writing of data. If you are
|
||||
* not writing to a standard C stream, you should create a replacement
|
||||
* write_data function and use it at run time with png_set_write_fn(), rather
|
||||
* than changing the library.
|
||||
*/
|
||||
void PNGCBAPI
|
||||
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_size_t check;
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
|
||||
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Write Error");
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This function is called to output any data pending writing (normally
|
||||
* to disk). After png_flush is called, there should be no data pending
|
||||
* writing in any buffers.
|
||||
*/
|
||||
#ifdef PNG_WRITE_FLUSH_SUPPORTED
|
||||
void /* PRIVATE */
|
||||
png_flush(png_structrp png_ptr)
|
||||
{
|
||||
if (png_ptr->output_flush_fn != NULL)
|
||||
(*(png_ptr->output_flush_fn))(png_ptr);
|
||||
}
|
||||
|
||||
# ifdef PNG_STDIO_SUPPORTED
|
||||
void PNGCBAPI
|
||||
png_default_flush(png_structp png_ptr)
|
||||
{
|
||||
png_FILE_p io_ptr;
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
io_ptr = png_voidcast(png_FILE_p, (png_ptr->io_ptr));
|
||||
fflush(io_ptr);
|
||||
}
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* This function allows the application to supply new output functions for
|
||||
* libpng if standard C streams aren't being used.
|
||||
*
|
||||
* This function takes as its arguments:
|
||||
* png_ptr - pointer to a png output data structure
|
||||
* io_ptr - pointer to user supplied structure containing info about
|
||||
* the output functions. May be NULL.
|
||||
* write_data_fn - pointer to a new output function that takes as its
|
||||
* arguments a pointer to a png_struct, a pointer to
|
||||
* data to be written, and a 32-bit unsigned int that is
|
||||
* the number of bytes to be written. The new write
|
||||
* function should call png_error(png_ptr, "Error msg")
|
||||
* to exit and output any fatal error messages. May be
|
||||
* NULL, in which case libpng's default function will
|
||||
* be used.
|
||||
* flush_data_fn - pointer to a new flush function that takes as its
|
||||
* arguments a pointer to a png_struct. After a call to
|
||||
* the flush function, there should be no data in any buffers
|
||||
* or pending transmission. If the output method doesn't do
|
||||
* any buffering of output, a function prototype must still be
|
||||
* supplied although it doesn't have to do anything. If
|
||||
* PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
|
||||
* time, output_flush_fn will be ignored, although it must be
|
||||
* supplied for compatibility. May be NULL, in which case
|
||||
* libpng's default function will be used, if
|
||||
* PNG_WRITE_FLUSH_SUPPORTED is defined. This is not
|
||||
* a good idea if io_ptr does not point to a standard
|
||||
* *FILE structure.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr,
|
||||
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_ptr->io_ptr = io_ptr;
|
||||
|
||||
#ifdef PNG_STDIO_SUPPORTED
|
||||
if (write_data_fn != NULL)
|
||||
png_ptr->write_data_fn = write_data_fn;
|
||||
|
||||
else
|
||||
png_ptr->write_data_fn = png_default_write_data;
|
||||
#else
|
||||
png_ptr->write_data_fn = write_data_fn;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_FLUSH_SUPPORTED
|
||||
# ifdef PNG_STDIO_SUPPORTED
|
||||
|
||||
if (output_flush_fn != NULL)
|
||||
png_ptr->output_flush_fn = output_flush_fn;
|
||||
|
||||
else
|
||||
png_ptr->output_flush_fn = png_default_flush;
|
||||
|
||||
# else
|
||||
png_ptr->output_flush_fn = output_flush_fn;
|
||||
# endif
|
||||
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
|
||||
|
||||
/* It is an error to read while writing a png file */
|
||||
if (png_ptr->read_data_fn != NULL)
|
||||
{
|
||||
png_ptr->read_data_fn = NULL;
|
||||
|
||||
png_warning(png_ptr,
|
||||
"Can't set both read_data_fn and write_data_fn in the"
|
||||
" same structure");
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
@ -1,637 +0,0 @@
|
||||
|
||||
/* pngwtran.c - transforms the data in a row for PNG writers
|
||||
*
|
||||
* Last changed in libpng 1.6.0 [February 14, 2013]
|
||||
* Copyright (c) 1998-2013 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.)
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
#include "pngpriv.h"
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
|
||||
#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
|
||||
/* Transform the data according to the user's wishes. The order of
|
||||
* transformations is significant.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_write_transformations(png_structrp png_ptr, png_row_infop row_info)
|
||||
{
|
||||
png_debug(1, "in png_do_write_transformations");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_USER_TRANSFORM)
|
||||
if (png_ptr->write_user_transform_fn != NULL)
|
||||
(*(png_ptr->write_user_transform_fn)) /* User write transform
|
||||
function */
|
||||
(png_ptr, /* png_ptr */
|
||||
row_info, /* row_info: */
|
||||
/* png_uint_32 width; width of row */
|
||||
/* png_size_t rowbytes; number of bytes in row */
|
||||
/* png_byte color_type; color type of pixels */
|
||||
/* png_byte bit_depth; bit depth of samples */
|
||||
/* png_byte channels; number of channels (1-4) */
|
||||
/* png_byte pixel_depth; bits per pixel (depth*channels) */
|
||||
png_ptr->row_buf + 1); /* start of pixel data for row */
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_FILLER_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_FILLER)
|
||||
png_do_strip_channel(row_info, png_ptr->row_buf + 1,
|
||||
!(png_ptr->flags & PNG_FLAG_FILLER_AFTER));
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_PACKSWAP)
|
||||
png_do_packswap(row_info, png_ptr->row_buf + 1);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_PACK_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_PACK)
|
||||
png_do_pack(row_info, png_ptr->row_buf + 1,
|
||||
(png_uint_32)png_ptr->bit_depth);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_SWAP_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_SWAP_BYTES)
|
||||
png_do_swap(row_info, png_ptr->row_buf + 1);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_SHIFT_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_SHIFT)
|
||||
png_do_shift(row_info, png_ptr->row_buf + 1,
|
||||
&(png_ptr->shift));
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_SWAP_ALPHA)
|
||||
png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_INVERT_ALPHA)
|
||||
png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_BGR_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_BGR)
|
||||
png_do_bgr(row_info, png_ptr->row_buf + 1);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_INVERT_SUPPORTED
|
||||
if (png_ptr->transformations & PNG_INVERT_MONO)
|
||||
png_do_invert(row_info, png_ptr->row_buf + 1);
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_PACK_SUPPORTED
|
||||
/* Pack pixels into bytes. Pass the true bit depth in bit_depth. The
|
||||
* row_info bit depth should be 8 (one pixel per byte). The channels
|
||||
* should be 1 (this only happens on grayscale and paletted images).
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
|
||||
{
|
||||
png_debug(1, "in png_do_pack");
|
||||
|
||||
if (row_info->bit_depth == 8 &&
|
||||
row_info->channels == 1)
|
||||
{
|
||||
switch ((int)bit_depth)
|
||||
{
|
||||
case 1:
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
int mask, v;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
sp = row;
|
||||
dp = row;
|
||||
mask = 0x80;
|
||||
v = 0;
|
||||
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
if (*sp != 0)
|
||||
v |= mask;
|
||||
|
||||
sp++;
|
||||
|
||||
if (mask > 1)
|
||||
mask >>= 1;
|
||||
|
||||
else
|
||||
{
|
||||
mask = 0x80;
|
||||
*dp = (png_byte)v;
|
||||
dp++;
|
||||
v = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (mask != 0x80)
|
||||
*dp = (png_byte)v;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case 2:
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
int shift, v;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
sp = row;
|
||||
dp = row;
|
||||
shift = 6;
|
||||
v = 0;
|
||||
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
png_byte value;
|
||||
|
||||
value = (png_byte)(*sp & 0x03);
|
||||
v |= (value << shift);
|
||||
|
||||
if (shift == 0)
|
||||
{
|
||||
shift = 6;
|
||||
*dp = (png_byte)v;
|
||||
dp++;
|
||||
v = 0;
|
||||
}
|
||||
|
||||
else
|
||||
shift -= 2;
|
||||
|
||||
sp++;
|
||||
}
|
||||
|
||||
if (shift != 6)
|
||||
*dp = (png_byte)v;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case 4:
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
int shift, v;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
sp = row;
|
||||
dp = row;
|
||||
shift = 4;
|
||||
v = 0;
|
||||
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
png_byte value;
|
||||
|
||||
value = (png_byte)(*sp & 0x0f);
|
||||
v |= (value << shift);
|
||||
|
||||
if (shift == 0)
|
||||
{
|
||||
shift = 4;
|
||||
*dp = (png_byte)v;
|
||||
dp++;
|
||||
v = 0;
|
||||
}
|
||||
|
||||
else
|
||||
shift -= 4;
|
||||
|
||||
sp++;
|
||||
}
|
||||
|
||||
if (shift != 4)
|
||||
*dp = (png_byte)v;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
row_info->bit_depth = (png_byte)bit_depth;
|
||||
row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
|
||||
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
|
||||
row_info->width);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_SHIFT_SUPPORTED
|
||||
/* Shift pixel values to take advantage of whole range. Pass the
|
||||
* true number of bits in bit_depth. The row should be packed
|
||||
* according to row_info->bit_depth. Thus, if you had a row of
|
||||
* bit depth 4, but the pixels only had values from 0 to 7, you
|
||||
* would pass 3 as bit_depth, and this routine would translate the
|
||||
* data to 0 to 15.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_shift(png_row_infop row_info, png_bytep row,
|
||||
png_const_color_8p bit_depth)
|
||||
{
|
||||
png_debug(1, "in png_do_shift");
|
||||
|
||||
if (row_info->color_type != PNG_COLOR_TYPE_PALETTE)
|
||||
{
|
||||
int shift_start[4], shift_dec[4];
|
||||
int channels = 0;
|
||||
|
||||
if (row_info->color_type & PNG_COLOR_MASK_COLOR)
|
||||
{
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->red;
|
||||
shift_dec[channels] = bit_depth->red;
|
||||
channels++;
|
||||
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->green;
|
||||
shift_dec[channels] = bit_depth->green;
|
||||
channels++;
|
||||
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->blue;
|
||||
shift_dec[channels] = bit_depth->blue;
|
||||
channels++;
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->gray;
|
||||
shift_dec[channels] = bit_depth->gray;
|
||||
channels++;
|
||||
}
|
||||
|
||||
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
|
||||
{
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->alpha;
|
||||
shift_dec[channels] = bit_depth->alpha;
|
||||
channels++;
|
||||
}
|
||||
|
||||
/* With low row depths, could only be grayscale, so one channel */
|
||||
if (row_info->bit_depth < 8)
|
||||
{
|
||||
png_bytep bp = row;
|
||||
png_size_t i;
|
||||
unsigned int mask;
|
||||
png_size_t row_bytes = row_info->rowbytes;
|
||||
|
||||
if (bit_depth->gray == 1 && row_info->bit_depth == 2)
|
||||
mask = 0x55;
|
||||
|
||||
else if (row_info->bit_depth == 4 && bit_depth->gray == 3)
|
||||
mask = 0x11;
|
||||
|
||||
else
|
||||
mask = 0xff;
|
||||
|
||||
for (i = 0; i < row_bytes; i++, bp++)
|
||||
{
|
||||
int j;
|
||||
unsigned int v, out;
|
||||
|
||||
v = *bp;
|
||||
out = 0;
|
||||
|
||||
for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0])
|
||||
{
|
||||
if (j > 0)
|
||||
out |= v << j;
|
||||
|
||||
else
|
||||
out |= (v >> (-j)) & mask;
|
||||
}
|
||||
|
||||
*bp = (png_byte)(out & 0xff);
|
||||
}
|
||||
}
|
||||
|
||||
else if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep bp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = channels * row_info->width;
|
||||
|
||||
for (i = 0; i < istop; i++, bp++)
|
||||
{
|
||||
|
||||
const unsigned int c = i%channels;
|
||||
int j;
|
||||
unsigned int v, out;
|
||||
|
||||
v = *bp;
|
||||
out = 0;
|
||||
|
||||
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
|
||||
{
|
||||
if (j > 0)
|
||||
out |= v << j;
|
||||
|
||||
else
|
||||
out |= v >> (-j);
|
||||
}
|
||||
|
||||
*bp = (png_byte)(out & 0xff);
|
||||
}
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
png_bytep bp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = channels * row_info->width;
|
||||
|
||||
for (bp = row, i = 0; i < istop; i++)
|
||||
{
|
||||
const unsigned int c = i%channels;
|
||||
int j;
|
||||
unsigned int value, v;
|
||||
|
||||
v = png_get_uint_16(bp);
|
||||
value = 0;
|
||||
|
||||
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
|
||||
{
|
||||
if (j > 0)
|
||||
value |= v << j;
|
||||
|
||||
else
|
||||
value |= v >> (-j);
|
||||
}
|
||||
*bp++ = (png_byte)((value >> 8) & 0xff);
|
||||
*bp++ = (png_byte)(value & 0xff);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
|
||||
void /* PRIVATE */
|
||||
png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_write_swap_alpha");
|
||||
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This converts from ARGB to RGBA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_16BIT_SUPPORTED
|
||||
else
|
||||
{
|
||||
/* This converts from AARRGGBB to RRGGBBAA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save[2];
|
||||
save[0] = *(sp++);
|
||||
save[1] = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save[0];
|
||||
*(dp++) = save[1];
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WRITE_16BIT_SUPPORTED */
|
||||
}
|
||||
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This converts from AG to GA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_16BIT_SUPPORTED
|
||||
else
|
||||
{
|
||||
/* This converts from AAGG to GGAA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save[2];
|
||||
save[0] = *(sp++);
|
||||
save[1] = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save[0];
|
||||
*(dp++) = save[1];
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WRITE_16BIT_SUPPORTED */
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
|
||||
void /* PRIVATE */
|
||||
png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_write_invert_alpha");
|
||||
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This inverts the alpha channel in RGBA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
/* Does nothing
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*/
|
||||
sp+=3; dp = sp;
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_16BIT_SUPPORTED
|
||||
else
|
||||
{
|
||||
/* This inverts the alpha channel in RRGGBBAA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
/* Does nothing
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*/
|
||||
sp+=6; dp = sp;
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WRITE_16BIT_SUPPORTED */
|
||||
}
|
||||
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This inverts the alpha channel in GA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_16BIT_SUPPORTED
|
||||
else
|
||||
{
|
||||
/* This inverts the alpha channel in GGAA */
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
/* Does nothing
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*/
|
||||
sp+=2; dp = sp;
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WRITE_16BIT_SUPPORTED */
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
|
||||
|
||||
#ifdef PNG_MNG_FEATURES_SUPPORTED
|
||||
/* Undoes intrapixel differencing */
|
||||
void /* PRIVATE */
|
||||
png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_write_intrapixel");
|
||||
|
||||
if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
|
||||
{
|
||||
int bytes_per_pixel;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
bytes_per_pixel = 3;
|
||||
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
bytes_per_pixel = 4;
|
||||
|
||||
else
|
||||
return;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
|
||||
{
|
||||
*(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff);
|
||||
*(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff);
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_WRITE_16BIT_SUPPORTED
|
||||
else if (row_info->bit_depth == 16)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
bytes_per_pixel = 6;
|
||||
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
bytes_per_pixel = 8;
|
||||
|
||||
else
|
||||
return;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
|
||||
{
|
||||
png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1);
|
||||
png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3);
|
||||
png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
|
||||
png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL);
|
||||
png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL);
|
||||
*(rp ) = (png_byte)((red >> 8) & 0xff);
|
||||
*(rp + 1) = (png_byte)(red & 0xff);
|
||||
*(rp + 4) = (png_byte)((blue >> 8) & 0xff);
|
||||
*(rp + 5) = (png_byte)(blue & 0xff);
|
||||
}
|
||||
}
|
||||
#endif /* PNG_WRITE_16BIT_SUPPORTED */
|
||||
}
|
||||
}
|
||||
#endif /* PNG_MNG_FEATURES_SUPPORTED */
|
||||
#endif /* PNG_WRITE_SUPPORTED */
|
||||
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Reference in New Issue
Block a user