mirror of https://github.com/stella-emu/stella.git
Checked in project which builds a Universal Binary build of libpng. libpng is not distributed with the Mac, and the Fink versions, etc, are not yet Universal Binary, so this subproject was added to build the version of the library we are currently using.
git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@1029 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
markgrebe
parent
477dc10fd9
commit
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Libpng 1.2.5 - October 3, 2002
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This is a public release of libpng, intended for use in production codes.
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|
||||
Changes since the last public release (1.2.4):
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||||
|
||||
Revised makefile.cygwin to use DLL number 12 instead of 13.
|
||||
Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
|
||||
Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
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||||
Removed some stray *.o files from contrib/gregbook.
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Changed png_error() to png_warning() about "Too much data" in pngpread.c
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and about "Extra compressed data" in pngrutil.c.
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Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
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Updated makefile.hggcc
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||||
Updated png.c and pnggccrd.c handling of return from png_mmx_support()
|
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Only issue png_warning() about "Too much data" in pngpread.c when avail_in
|
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is nonzero.
|
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Updated makefiles to install a separate libpng.so.3 with its own rpath.
|
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Revised makefiles to not remove previous minor versions of shared libraries.
|
||||
Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
|
||||
library loader directive.
|
||||
Revised libpng-config script.
|
||||
Relocated two misplaced PNGAPI lines in pngtest.c
|
||||
|
||||
Send comments/corrections/commendations to
|
||||
png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu
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||||
|
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Glenn R-P
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File diff suppressed because it is too large
Load Diff
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Installing libpng version 1.2.5 - October 3, 2002
|
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|
||||
Before installing libpng, you must first install zlib. zlib
|
||||
can usually be found wherever you got libpng. zlib can be
|
||||
placed in another directory, at the same level as libpng.
|
||||
Note that your system might already have a preinstalled
|
||||
zlib, but you will still need to have access to the
|
||||
zlib.h and zconf.h include files that correspond to the
|
||||
version of zlib that's installed.
|
||||
|
||||
You can rename the directories that you downloaded (they
|
||||
might be called "libpng-1.2.5" or "lpng109" and "zlib-1.1.4"
|
||||
or "zlib114") so that you have directories called "zlib" and "libpng".
|
||||
|
||||
Your directory structure should look like this:
|
||||
|
||||
.. (the parent directory)
|
||||
libpng (this directory)
|
||||
INSTALL (this file)
|
||||
README
|
||||
*.h
|
||||
*.c
|
||||
contrib
|
||||
gregbook
|
||||
msvctest
|
||||
pngminus
|
||||
pngsuite
|
||||
visupng
|
||||
projects
|
||||
beos
|
||||
borland
|
||||
msvc
|
||||
netware.txt
|
||||
wince.txt
|
||||
scripts
|
||||
makefile.*
|
||||
libpng*.in
|
||||
pngtest.png
|
||||
etc.
|
||||
zlib
|
||||
README
|
||||
*.h
|
||||
*.c
|
||||
contrib
|
||||
etc.
|
||||
|
||||
If the line endings in the files look funny, you may wish to get the other
|
||||
distribution of libpng. It is available in both tar.gz (UNIX style line
|
||||
endings) and zip (DOS style line endings) formats.
|
||||
|
||||
If you are building libpng with MSVC, you can enter the libpng\msvc directory
|
||||
and follow the instructions in msvc\README.txt.
|
||||
|
||||
You can build libpng for WindowsCE by entering the downloading and installing
|
||||
the libpng\wince directory as instructed in the projects\wince.txt file, and
|
||||
then following the instructions in the README* files. Similarly, you can
|
||||
build libpng for Netware as instructed in projects\netware.txt.
|
||||
|
||||
Else enter the zlib directory and follow the instructions in zlib/README,
|
||||
then come back here and choose the appropriate makefile.sys in the scripts
|
||||
directory.
|
||||
|
||||
The files that are presently available in the scripts directory
|
||||
include
|
||||
|
||||
makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
|
||||
makefile.linux => Linux/ELF makefile (gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.gcmmx => Linux/ELF makefile (gcc, creates libpng12.so.0.1.2.5,
|
||||
uses assembler code tuned for Intel MMX platform)
|
||||
makefile.gcc => Generic makefile (gcc, creates static libpng.a)
|
||||
makefile.knr => Archaic UNIX Makefile that converts files with
|
||||
ansi2knr (Requires ansi2knr.c from
|
||||
ftp://ftp.cs.wisc.edu/ghost)
|
||||
makefile.aix => AIX/gcc makefile
|
||||
makefile.cygwin => Cygwin/gcc makefile
|
||||
makefile.darwin => Darwin makefile
|
||||
makefile.dec => DEC Alpha UNIX makefile
|
||||
makefile.hpgcc => FreeBSD makefile
|
||||
makefile.hpgcc => HPUX makefile using gcc
|
||||
makefile.hpux => HPUX (10.20 and 11.00) makefile
|
||||
makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
|
||||
makefile.intel => Intel C/C++ version 4.0 and later
|
||||
libpng.icc => Project file for IBM VisualAge/C++ version 4.0 or later
|
||||
makefile.macosx => MACOS X Makefile
|
||||
makefile.netbsd => NetBSD/cc makefile, uses PNGGCCRD, makes libpng.so.
|
||||
makefile.ne0bsd => NetBSD/cc makefile, uses PNGGCCRD, makes libpng0.so
|
||||
makefile.openbsd => OpenBSD makefile
|
||||
makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
|
||||
makefile.sggcc => Silicon Graphics (gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.sunos => Sun makefile
|
||||
makefile.solaris => Solaris 2.X makefile (gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.so9 => Solaris 9 makefile (gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.32sunu => Sun Ultra 32-bit makefile
|
||||
makefile.64sunu => Sun Ultra 64-bit makefile
|
||||
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
|
||||
makefile.mips => MIPS makefile
|
||||
makefile.acorn => Acorn makefile
|
||||
makefile.amiga => Amiga makefile
|
||||
smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler
|
||||
(Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)
|
||||
makefile.atari => Atari makefile
|
||||
makefile.beos => BEOS makefile for X86
|
||||
makefile.bor => Borland makefile (uses bcc)
|
||||
makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
|
||||
makefile.bd32 => To make a png32bd.dll with Borland C++ 4.5
|
||||
makefile.tc3 => Turbo C 3.0 makefile
|
||||
makefile.dj2 => DJGPP 2 makefile
|
||||
makefile.msc => Microsoft C makefile
|
||||
makefile.vcawin32 => makefile for Microsoft Visual C++ 5.0 and later (uses
|
||||
assembler code tuned for Intel MMX platform)
|
||||
makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and later (does
|
||||
not use assembler code)
|
||||
makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
|
||||
pngos2.def => OS/2 module definition file used by makefile.os2
|
||||
makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model
|
||||
makevms.com => VMS build script
|
||||
descrip.mms => VMS makefile for MMS or MMK
|
||||
pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5
|
||||
SCOPTIONS.ppc => Used with smakefile.ppc
|
||||
|
||||
Copy the file (or files) that you need from the
|
||||
scripts directory into this directory, for example
|
||||
|
||||
MSDOS example: copy scripts\makefile.msc makefile
|
||||
UNIX example: cp scripts/makefile.std makefile
|
||||
|
||||
Read the makefile to see if you need to change any source or
|
||||
target directories to match your preferences.
|
||||
|
||||
Then read pngconf.h to see if you want to make any configuration
|
||||
changes.
|
||||
|
||||
Then just run "make test" which will create the libpng library in
|
||||
this directory and run a quick test that reads the "pngtest.png"
|
||||
file and writes a "pngout.png" file that should be identical to it.
|
||||
Look for "9782 zero samples" in the output of the test. For more
|
||||
confidence, you can run another test by typing "pngtest pngnow.png"
|
||||
and looking for "289 zero samples" in the output. Also, you can
|
||||
run "pngtest -m *.png" in the "contrib/pngsuite" directory and compare
|
||||
your output with the result shown in contrib/pngsuite/README.
|
||||
|
||||
Most of the makefiles will allow you to run "make install" to
|
||||
put the library in its final resting place (if you want to
|
||||
do that, run "make install" in the zlib directory first if necessary).
|
||||
Some also allow you to run "make test-installed" after you have
|
||||
run "make install".
|
||||
|
||||
Further information can be found in the README and libpng.txt
|
||||
files, in the individual makefiles, in png.h, in the README files in
|
||||
subdirectories of the LIB directory, and the manual pages libpng.3 and png.5.
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
|
||||
Known bugs in libpng version 1.2.5
|
||||
|
||||
1. April 22, 2001: pnggccrd.c has been reported to crash on NetBSD when
|
||||
reading interlaced PNG files, when assembler code is enabled but running
|
||||
on a non-MMX i386 platform.
|
||||
|
||||
STATUS: Under investigation. The change to pnggccrd.c in libpng-1.2.1
|
||||
fixed a problem under FreeBSD but not the problem with NetBSD, which
|
||||
still fails as of libpng-1.2.2rc1.
|
||||
|
||||
|
|
@ -0,0 +1,102 @@
|
|||
|
||||
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.
|
||||
|
||||
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"
|
||||
boxes and the like:
|
||||
|
||||
printf("%s",png_get_copyright(NULL));
|
||||
|
||||
Also, the PNG logo (in PNG format, of course) is supplied in the
|
||||
files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
|
||||
|
||||
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
|
||||
certification mark of the Open Source Initiative.
|
||||
|
||||
Glenn Randers-Pehrson
|
||||
randeg@alum.rpi.edu
|
||||
October 3, 2002
|
||||
|
|
@ -0,0 +1,269 @@
|
|||
README for libpng 1.2.5 - October 3, 2002 (shared library 12.0)
|
||||
See the note about version numbers near the top of png.h
|
||||
|
||||
See INSTALL for instructions on how to install libpng.
|
||||
|
||||
Libpng comes in two distribution formats. Get libpng-*.tar.gz if you
|
||||
want UNIX-style line endings in the text files, or lpng*.zip if you want
|
||||
DOS-style line endings.
|
||||
|
||||
Version 0.89 was the first official release of libpng. Don't let the
|
||||
fact that it's the first release fool you. The libpng library has been in
|
||||
extensive use and testing since mid-1995. By late 1997 it had
|
||||
finally gotten to the stage where there hadn't been significant
|
||||
changes to the API in some time, and people have a bad feeling about
|
||||
libraries with versions < 1.0. Version 1.0.0 was released in
|
||||
March 1998.
|
||||
|
||||
****
|
||||
Note that some of the changes to the png_info structure render this
|
||||
version of the library binary incompatible with libpng-0.89 or
|
||||
earlier versions if you are using a shared library. The type of the
|
||||
"filler" parameter for png_set_filler() has changed from png_byte to
|
||||
png_uint_32, which will affect shared-library applications that use
|
||||
this function.
|
||||
|
||||
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
|
||||
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.
|
||||
****
|
||||
|
||||
Additions since 0.90 include the ability to compile libpng as a
|
||||
Windows DLL, and new APIs for accessing data in the info struct.
|
||||
Experimental functions include the ability to set weighting and cost
|
||||
factors for row filter selection, direct reads of integers from buffers
|
||||
on big-endian processors that support misaligned data access, faster
|
||||
methods of doing alpha composition, and more accurate 16->8 bit color
|
||||
conversion.
|
||||
|
||||
The additions since 0.89 include the ability to read from a PNG stream
|
||||
which has had some (or all) of the signature bytes read by the calling
|
||||
application. This also allows the reading of embedded PNG streams that
|
||||
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 implementation mailing list <png-implement@ccrc.wustl.edu>
|
||||
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.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.
|
||||
If not, it should be at ftp.uu.net in /graphics/png
|
||||
Eventually, it will be at ftp.uu.net in /pub/archiving/zip/zlib
|
||||
|
||||
You may also want a copy of the PNG specification. It is available
|
||||
as an RFC and a W3C Recommendation. Failing
|
||||
these resources you can try ftp.uu.net in the /graphics/png directory.
|
||||
|
||||
This code is currently being archived at ftp.uu.net in the
|
||||
/graphics/png directory, and on CompuServe, Lib 20 (PNG SUPPORT)
|
||||
at GO GRAPHSUP. 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 group.
|
||||
|
||||
randeg@alum.rpi.edu
|
||||
png-implement@ccrc.wustl.edu
|
||||
|
||||
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
|
||||
the address in the specification (png-group@w3.org). At the same
|
||||
time, please do not send libpng questions to that address, send them to me
|
||||
or to png-implement@ccrc.wustl.edu. I'll
|
||||
get them in the end anyway. 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 three 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 for version
|
||||
1.0, 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.txt)
|
||||
libpng.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
|
||||
pngconf.h => System specific library configuration
|
||||
pngasmrd.h => Header file for assembler-coded functions
|
||||
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
|
||||
contrib => Contributions
|
||||
gregbook => source code for PNG reading and writing, from
|
||||
Greg Roelofs' "PNG: The Definitive Guide",
|
||||
O'Reilly, 1999
|
||||
msvctest => Builds and runs pngtest using a MSVC workspace
|
||||
pngminus => Simple pnm2png and png2pnm programs
|
||||
pngsuite => Test images
|
||||
visupng => Contains a MSVC workspace for VisualPng
|
||||
projects => Contains project files and workspaces for building DLL
|
||||
beos => Contains a Beos workspace for building libpng
|
||||
borland => Contains a Borland workspace for building libpng
|
||||
and zlib
|
||||
msvc => Contains a Microsoft Visual C++ (MSVC) workspace
|
||||
for building libpng and zlib
|
||||
netware.txt => Contains instructions for downloading a set of
|
||||
project files for building libpng and zlib on
|
||||
Netware.
|
||||
wince.txt => Contains instructions for downloading a Microsoft
|
||||
Visual C++ (Windows CD Toolkit) workspace for
|
||||
building libpng and zlib on WindowsCE
|
||||
scripts => Directory containing scripts for building libpng:
|
||||
descrip.mms => VMS makefile for MMS or MMK
|
||||
makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
|
||||
makefile.linux => Linux/ELF makefile
|
||||
(gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.gcmmx => Linux/ELF makefile (gcc, creates
|
||||
libpng12.so.0.1.2.5, uses assembler code
|
||||
tuned for Intel MMX platform)
|
||||
makefile.gcc => Generic makefile (gcc, creates static libpng.a)
|
||||
makefile.knr => Archaic UNIX Makefile that converts files with
|
||||
ansi2knr (Requires ansi2knr.c from
|
||||
ftp://ftp.cs.wisc.edu/ghost)
|
||||
makefile.aix => AIX makefile
|
||||
makefile.cygwin => Cygwin/gcc makefile
|
||||
makefile.darwin => Darwin makefile
|
||||
makefile.dec => DEC Alpha UNIX makefile
|
||||
makefile.freebsd => FreeBSD makefile
|
||||
makefile.hpgcc => HPUX makefile using gcc
|
||||
makefile.hpux => HPUX (10.20 and 11.00) makefile
|
||||
makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
|
||||
makefile.intel => Intel C/C++ version 4.0 and later
|
||||
libpng.icc => Project file, IBM VisualAge/C++ 4.0 or later
|
||||
makefile.macosx => MACOS X Makefile
|
||||
makefile.netbsd => NetBSD/cc makefile, PNGGCCRD, makes libpng.so.
|
||||
makefile.ne0bsd => NetBSD/cc makefile, PNGGCCRD, makes libpng0.so
|
||||
makefile.openbsd => OpenBSD makefile
|
||||
makefile.sgi => Silicon Graphics IRIX (cc, creates static lib)
|
||||
makefile.sggcc => Silicon Graphics (gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.sunos => Sun makefile
|
||||
makefile.solaris => Solaris 2.X makefile
|
||||
(gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.so9 => Solaris 9 makefile
|
||||
(gcc, creates libpng12.so.0.1.2.5)
|
||||
makefile.32sunu => Sun Ultra 32-bit makefile
|
||||
makefile.64sunu => Sun Ultra 64-bit makefile
|
||||
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
|
||||
makefile.mips => MIPS makefile
|
||||
makefile.acorn => Acorn makefile
|
||||
makefile.amiga => Amiga makefile
|
||||
smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC
|
||||
compiler (Requires SCOPTIONS, copied from
|
||||
scripts/SCOPTIONS.ppc)
|
||||
makefile.atari => Atari makefile
|
||||
makefile.beos => BEOS makefile for X86
|
||||
makefile.bor => Borland makefile (uses bcc)
|
||||
makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
|
||||
makefile.bd32 => To make a png32bd.dll with Borland C++ 4.5
|
||||
makefile.tc3 => Turbo C 3.0 makefile
|
||||
makefile.dj2 => DJGPP 2 makefile
|
||||
makefile.msc => Microsoft C makefile
|
||||
makefile.vcawin32 => makefile for Microsoft Visual C++ 5.0 and
|
||||
later (uses assembler code tuned for Intel MMX
|
||||
platform)
|
||||
makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and
|
||||
later (does not use assembler code)
|
||||
makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
|
||||
pngos2.def => OS/2 module definition file used by makefile.os2
|
||||
makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model
|
||||
makevms.com => VMS build script
|
||||
pngdef.pas => Defines for a png32bd.dll with Borland C++ 4.5
|
||||
SCOPTIONS.ppc => Used with smakefile.ppc
|
||||
mangle => Directory containing scripts to build libpng12m.so:
|
||||
mangle.in => Function-decoration macros added to png.h by the
|
||||
makefiles.
|
||||
makefile.linux => Linux/ELF makefile
|
||||
(gcc, creates libpng12m.so.0.1.2.5)
|
||||
makefile.gcmmx => Linux/ELF makefile (gcc, creates
|
||||
libpng12.so.0m.1.2.5, uses assembler code
|
||||
tuned for Intel MMX platform)
|
||||
makefile.sgi => Silicon Graphics (cc, creates libpng12m.so)
|
||||
makefile.sggcc => Silicon Graphics (gcc, creates libpng12m.so)
|
||||
|
||||
Good luck, and happy coding.
|
||||
|
||||
-Glenn Randers-Pehrson
|
||||
Internet: randeg@alum.rpi.edu
|
||||
|
||||
-Andreas Eric Dilger
|
||||
Internet: adilger@enel.ucalgary.ca
|
||||
Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
|
||||
|
||||
-Guy Eric Schalnat
|
||||
(formerly of Group 42, Inc)
|
||||
Internet: gschal@infinet.com
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
TODO - list of things to do for libpng:
|
||||
|
||||
Final bug fixes.
|
||||
Improve API by hiding the png_struct and png_info structs.
|
||||
Finish work on the no-floating-point version (including gamma compensation)
|
||||
Better C++ wrapper/full C++ implementation?
|
||||
Fix problem with C++ and EXTERN "C".
|
||||
cHRM transformation.
|
||||
Improve setjmp/longjmp usage or remove it in favor of returning error codes.
|
||||
Add "grayscale->palette" transformation and "palette->grayscale" detection.
|
||||
Improved dithering.
|
||||
Multi-lingual error and warning message support.
|
||||
Complete sRGB transformation (presently it simply uses gamma=0.45455).
|
||||
Man pages for function calls.
|
||||
Better documentation.
|
||||
Better filter selection
|
||||
(counting huffman bits/precompression? filter inertia? filter costs?).
|
||||
Histogram creation.
|
||||
Text conversion between different code pages (Latin-1 -> Mac and DOS).
|
||||
Should we always malloc 2^bit_depth PLTE/tRNS/hIST entries for safety?
|
||||
Build gamma tables using fixed point (and do away with floating point entirely).
|
||||
Use greater precision when changing to linear gamma for compositing against
|
||||
background and doing rgb-to-gray transformation.
|
||||
Investigate pre-incremented loop counters and other loop constructions.
|
||||
|
|
@ -0,0 +1,55 @@
|
|||
Y2K compliance in libpng:
|
||||
=========================
|
||||
|
||||
October 3, 2002
|
||||
|
||||
Since the PNG Development group is an ad-hoc body, we can't make
|
||||
an official declaration.
|
||||
|
||||
This is your unofficial assurance that libpng from version 0.71 and
|
||||
upward through 1.2.5 are Y2K compliant. It is my belief that earlier
|
||||
versions were also Y2K compliant.
|
||||
|
||||
Libpng only has three year fields. One is a 2-byte unsigned integer
|
||||
that will hold years up to 65535. The other two hold the date in text
|
||||
format, and will hold years up to 9999.
|
||||
|
||||
The integer is
|
||||
"png_uint_16 year" in png_time_struct.
|
||||
|
||||
The strings are
|
||||
"png_charp time_buffer" in png_struct and
|
||||
"near_time_buffer", which is a local character string in png.c.
|
||||
|
||||
There are seven time-related functions:
|
||||
|
||||
png_convert_to_rfc_1123() in png.c
|
||||
(formerly png_convert_to_rfc_1152() in error)
|
||||
png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c
|
||||
png_convert_from_time_t() in pngwrite.c
|
||||
png_get_tIME() in pngget.c
|
||||
png_handle_tIME() in pngrutil.c, called in pngread.c
|
||||
png_set_tIME() in pngset.c
|
||||
png_write_tIME() in pngwutil.c, called in pngwrite.c
|
||||
|
||||
All appear to handle dates properly in a Y2K environment. The
|
||||
png_convert_from_time_t() function calls gmtime() to convert from system
|
||||
clock time, which returns (year - 1900), which we properly convert to
|
||||
the full 4-digit year. There is a possibility that applications using
|
||||
libpng are not passing 4-digit years into the png_convert_to_rfc_1123()
|
||||
function, or that they are incorrectly passing only a 2-digit year
|
||||
instead of "year - 1900" into the png_convert_from_struct_tm() function,
|
||||
but this is not under our control. The libpng documentation has always
|
||||
stated that it works with 4-digit years, and the APIs have been
|
||||
documented as such.
|
||||
|
||||
The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned
|
||||
integer to hold the year, and can hold years as large as 65535.
|
||||
|
||||
zlib, upon which libpng depends, is also Y2K compliant. It contains
|
||||
no date-related code.
|
||||
|
||||
|
||||
Glenn Randers-Pehrson
|
||||
libpng maintainer
|
||||
PNG Development Group
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
SDKROOT_ppc = /Developer/SDKs/MacOSX10.2.8.sdk
|
||||
SDKROOT_i386 = /Developer/SDKs/MacOSX10.4u.sdk
|
||||
GCC_VERSION_ppc = 3.3
|
||||
GCC_VERSION_i386 = 4.0
|
||||
MACOSX_DEPLOYMENT_TARGET_ppc = 10.2
|
||||
MACOSX_DEPLOYMENT_TARGET_i386 = 10.4
|
||||
|
|
@ -0,0 +1,296 @@
|
|||
// !$*UTF8*$!
|
||||
{
|
||||
archiveVersion = 1;
|
||||
classes = {
|
||||
};
|
||||
objectVersion = 42;
|
||||
objects = {
|
||||
|
||||
/* Begin PBXBuildFile section */
|
||||
2DA770C209BA2E4D005A2B06 /* png.c in Sources */ = {isa = PBXBuildFile; fileRef = 2DA770B309BA2E4D005A2B06 /* png.c */; };
|
||||
2DA770C309BA2E4D005A2B06 /* pngerror.c in Sources */ = {isa = PBXBuildFile; fileRef = 2DA770B409BA2E4D005A2B06 /* pngerror.c */; };
|
||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
/* Begin PBXFileReference section */
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
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/* png.c - location for general purpose libpng functions
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||||
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||||
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||||
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||||
/* Invoke global declarations for constant strings for known chunk types */
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||||
PNG_IHDR;
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PNG_IDAT;
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PNG_IEND;
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PNG_PLTE;
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||||
PNG_bKGD;
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PNG_cHRM;
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PNG_gAMA;
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PNG_hIST;
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||||
PNG_iCCP;
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||||
PNG_iTXt;
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||||
PNG_oFFs;
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PNG_pCAL;
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PNG_sCAL;
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PNG_pHYs;
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PNG_sBIT;
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||||
PNG_sPLT;
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PNG_sRGB;
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PNG_tEXt;
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||||
PNG_tIME;
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||||
PNG_tRNS;
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||||
PNG_zTXt;
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||||
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||||
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||||
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||||
/* start of interlace block */
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||||
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||||
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||||
/* offset to next interlace block */
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||||
const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
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||||
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||||
/* start of interlace block in the y direction */
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||||
const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
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||||
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||||
/* offset to next interlace block in the y direction */
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||||
const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
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||||
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||||
/* width of interlace block (used in assembler routines only) */
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||||
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||||
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||||
/* Height of interlace block. This is not currently used - if you need
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||||
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const int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
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*/
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||||
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||||
/* Mask to determine which pixels are valid in a pass */
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||||
const int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
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||||
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||||
/* Mask to determine which pixels to overwrite while displaying */
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||||
const int FARDATA png_pass_dsp_mask[]
|
||||
= {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
|
||||
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||||
#endif
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||||
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/* Tells libpng that we have already handled the first "num_bytes" bytes
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*/
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||||
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void PNGAPI
|
||||
png_set_sig_bytes(png_structp png_ptr, int num_bytes)
|
||||
{
|
||||
png_debug(1, "in png_set_sig_bytes\n");
|
||||
if (num_bytes > 8)
|
||||
png_error(png_ptr, "Too many bytes for PNG signature.");
|
||||
|
||||
png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
|
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}
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||||
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/* Checks whether the supplied bytes match the PNG signature. We allow
|
||||
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|
||||
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|
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* can simply check the remaining bytes for extra assurance. Returns
|
||||
* an integer less than, equal to, or greater than zero if sig is found,
|
||||
* respectively, to be less than, to match, or be greater than the correct
|
||||
* PNG signature (this is the same behaviour as strcmp, memcmp, etc).
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||||
int PNGAPI
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||||
png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
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||||
{
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||||
png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
|
||||
if (num_to_check > 8)
|
||||
num_to_check = 8;
|
||||
else if (num_to_check < 1)
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return (0);
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||||
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if (start > 7)
|
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return (0);
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||||
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if (start + num_to_check > 8)
|
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num_to_check = 8 - start;
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||||
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return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
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||||
}
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||||
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/* (Obsolete) function to check signature bytes. It does not allow one
|
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* to check a partial signature. This function might be removed in the
|
||||
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|
||||
*/
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||||
int PNGAPI
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||||
png_check_sig(png_bytep sig, int num)
|
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{
|
||||
return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
|
||||
}
|
||||
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/* Function to allocate memory for zlib and clear it to 0. */
|
||||
#ifdef PNG_1_0_X
|
||||
voidpf PNGAPI
|
||||
#else
|
||||
voidpf /* private */
|
||||
#endif
|
||||
png_zalloc(voidpf png_ptr, uInt items, uInt size)
|
||||
{
|
||||
png_uint_32 num_bytes = (png_uint_32)items * size;
|
||||
png_voidp ptr;
|
||||
png_structp p=png_ptr;
|
||||
png_uint_32 save_flags=p->flags;
|
||||
|
||||
p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
|
||||
ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
|
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p->flags=save_flags;
|
||||
|
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#ifndef PNG_NO_ZALLOC_ZERO
|
||||
if (ptr == NULL)
|
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return ((voidpf)ptr);
|
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|
||||
if (num_bytes > (png_uint_32)0x8000L)
|
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{
|
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png_memset(ptr, 0, (png_size_t)0x8000L);
|
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png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0,
|
||||
(png_size_t)(num_bytes - (png_uint_32)0x8000L));
|
||||
}
|
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else
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{
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png_memset(ptr, 0, (png_size_t)num_bytes);
|
||||
}
|
||||
#endif
|
||||
return ((voidpf)ptr);
|
||||
}
|
||||
|
||||
/* function to free memory for zlib */
|
||||
#ifdef PNG_1_0_X
|
||||
void PNGAPI
|
||||
#else
|
||||
void /* private */
|
||||
#endif
|
||||
png_zfree(voidpf png_ptr, voidpf ptr)
|
||||
{
|
||||
png_free((png_structp)png_ptr, (png_voidp)ptr);
|
||||
}
|
||||
|
||||
/* Reset the CRC variable to 32 bits of 1's. Care must be taken
|
||||
* in case CRC is > 32 bits to leave the top bits 0.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_reset_crc(png_structp png_ptr)
|
||||
{
|
||||
png_ptr->crc = crc32(0, Z_NULL, 0);
|
||||
}
|
||||
|
||||
/* Calculate the CRC over a section of data. We can only pass as
|
||||
* much data to this routine as the largest single buffer size. We
|
||||
* also check that this data will actually be used before going to the
|
||||
* trouble of calculating it.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
|
||||
{
|
||||
int need_crc = 1;
|
||||
|
||||
if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
|
||||
{
|
||||
if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
|
||||
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
|
||||
need_crc = 0;
|
||||
}
|
||||
else /* critical */
|
||||
{
|
||||
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
|
||||
need_crc = 0;
|
||||
}
|
||||
|
||||
if (need_crc)
|
||||
png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
|
||||
}
|
||||
|
||||
/* Allocate the memory for an info_struct for the application. We don't
|
||||
* really need the png_ptr, but it could potentially be useful in the
|
||||
* future. This should be used in favour of malloc(sizeof(png_info))
|
||||
* and png_info_init() so that applications that want to use a shared
|
||||
* libpng don't have to be recompiled if png_info changes size.
|
||||
*/
|
||||
png_infop PNGAPI
|
||||
png_create_info_struct(png_structp png_ptr)
|
||||
{
|
||||
png_infop info_ptr;
|
||||
|
||||
png_debug(1, "in png_create_info_struct\n");
|
||||
if(png_ptr == NULL) return (NULL);
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
|
||||
png_ptr->malloc_fn, png_ptr->mem_ptr);
|
||||
#else
|
||||
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
|
||||
#endif
|
||||
if (info_ptr != NULL)
|
||||
png_info_init_3(&info_ptr, sizeof(png_info));
|
||||
|
||||
return (info_ptr);
|
||||
}
|
||||
|
||||
/* This function frees the memory associated with a single info struct.
|
||||
* Normally, one would use either png_destroy_read_struct() or
|
||||
* png_destroy_write_struct() to free an info struct, but this may be
|
||||
* useful for some applications.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
|
||||
{
|
||||
png_infop info_ptr = NULL;
|
||||
|
||||
png_debug(1, "in png_destroy_info_struct\n");
|
||||
if (info_ptr_ptr != NULL)
|
||||
info_ptr = *info_ptr_ptr;
|
||||
|
||||
if (info_ptr != NULL)
|
||||
{
|
||||
png_info_destroy(png_ptr, info_ptr);
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
|
||||
png_ptr->mem_ptr);
|
||||
#else
|
||||
png_destroy_struct((png_voidp)info_ptr);
|
||||
#endif
|
||||
*info_ptr_ptr = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/* Initialize the info structure. This is now an internal function (0.89)
|
||||
* and applications using it are urged to use png_create_info_struct()
|
||||
* instead.
|
||||
*/
|
||||
#undef png_info_init
|
||||
void PNGAPI
|
||||
png_info_init(png_infop info_ptr)
|
||||
{
|
||||
/* We only come here via pre-1.0.12-compiled applications */
|
||||
png_info_init_3(&info_ptr, 0);
|
||||
}
|
||||
|
||||
void PNGAPI
|
||||
png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
|
||||
{
|
||||
png_infop info_ptr = *ptr_ptr;
|
||||
|
||||
png_debug(1, "in png_info_init_3\n");
|
||||
|
||||
if(sizeof(png_info) > png_info_struct_size)
|
||||
{
|
||||
png_destroy_struct(info_ptr);
|
||||
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
|
||||
*ptr_ptr = info_ptr;
|
||||
}
|
||||
|
||||
/* set everything to 0 */
|
||||
png_memset(info_ptr, 0, sizeof (png_info));
|
||||
}
|
||||
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
void PNGAPI
|
||||
png_data_freer(png_structp png_ptr, png_infop info_ptr,
|
||||
int freer, png_uint_32 mask)
|
||||
{
|
||||
png_debug(1, "in png_data_freer\n");
|
||||
if (png_ptr == NULL || info_ptr == NULL)
|
||||
return;
|
||||
if(freer == PNG_DESTROY_WILL_FREE_DATA)
|
||||
info_ptr->free_me |= mask;
|
||||
else if(freer == PNG_USER_WILL_FREE_DATA)
|
||||
info_ptr->free_me &= ~mask;
|
||||
else
|
||||
png_warning(png_ptr,
|
||||
"Unknown freer parameter in png_data_freer.");
|
||||
}
|
||||
#endif
|
||||
|
||||
void PNGAPI
|
||||
png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
|
||||
int num)
|
||||
{
|
||||
png_debug(1, "in png_free_data\n");
|
||||
if (png_ptr == NULL || info_ptr == NULL)
|
||||
return;
|
||||
|
||||
#if defined(PNG_TEXT_SUPPORTED)
|
||||
/* free text item num or (if num == -1) all text items */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_TEXT)
|
||||
#endif
|
||||
{
|
||||
if (num != -1)
|
||||
{
|
||||
if (info_ptr->text && info_ptr->text[num].key)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->text[num].key);
|
||||
info_ptr->text[num].key = NULL;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < info_ptr->num_text; i++)
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
|
||||
png_free(png_ptr, info_ptr->text);
|
||||
info_ptr->text = NULL;
|
||||
info_ptr->num_text=0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tRNS_SUPPORTED)
|
||||
/* free any tRNS entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
|
||||
#else
|
||||
if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->trans);
|
||||
info_ptr->valid &= ~PNG_INFO_tRNS;
|
||||
#ifndef PNG_FREE_ME_SUPPORTED
|
||||
png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
|
||||
#endif
|
||||
info_ptr->trans = NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sCAL_SUPPORTED)
|
||||
/* free any sCAL entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_SCAL)
|
||||
#endif
|
||||
{
|
||||
#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
|
||||
png_free(png_ptr, info_ptr->scal_s_width);
|
||||
png_free(png_ptr, info_ptr->scal_s_height);
|
||||
info_ptr->scal_s_width = NULL;
|
||||
info_ptr->scal_s_height = NULL;
|
||||
#endif
|
||||
info_ptr->valid &= ~PNG_INFO_sCAL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_pCAL_SUPPORTED)
|
||||
/* free any pCAL entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_PCAL)
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->pcal_purpose);
|
||||
png_free(png_ptr, info_ptr->pcal_units);
|
||||
info_ptr->pcal_purpose = NULL;
|
||||
info_ptr->pcal_units = NULL;
|
||||
if (info_ptr->pcal_params != NULL)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->pcal_params[i]);
|
||||
info_ptr->pcal_params[i]=NULL;
|
||||
}
|
||||
png_free(png_ptr, info_ptr->pcal_params);
|
||||
info_ptr->pcal_params = NULL;
|
||||
}
|
||||
info_ptr->valid &= ~PNG_INFO_pCAL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_iCCP_SUPPORTED)
|
||||
/* free any iCCP entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_ICCP)
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->iccp_name);
|
||||
png_free(png_ptr, info_ptr->iccp_profile);
|
||||
info_ptr->iccp_name = NULL;
|
||||
info_ptr->iccp_profile = NULL;
|
||||
info_ptr->valid &= ~PNG_INFO_iCCP;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sPLT_SUPPORTED)
|
||||
/* free a given sPLT entry, or (if num == -1) all sPLT entries */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_SPLT)
|
||||
#endif
|
||||
{
|
||||
if (num != -1)
|
||||
{
|
||||
if(info_ptr->splt_palettes)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->splt_palettes[num].name);
|
||||
png_free(png_ptr, info_ptr->splt_palettes[num].entries);
|
||||
info_ptr->splt_palettes[num].name = NULL;
|
||||
info_ptr->splt_palettes[num].entries = NULL;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if(info_ptr->splt_palettes_num)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
|
||||
|
||||
png_free(png_ptr, info_ptr->splt_palettes);
|
||||
info_ptr->splt_palettes = NULL;
|
||||
info_ptr->splt_palettes_num = 0;
|
||||
}
|
||||
info_ptr->valid &= ~PNG_INFO_sPLT;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_UNKN)
|
||||
#endif
|
||||
{
|
||||
if (num != -1)
|
||||
{
|
||||
if(info_ptr->unknown_chunks)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->unknown_chunks[num].data);
|
||||
info_ptr->unknown_chunks[num].data = NULL;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
int i;
|
||||
|
||||
if(info_ptr->unknown_chunks_num)
|
||||
{
|
||||
for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
|
||||
|
||||
png_free(png_ptr, info_ptr->unknown_chunks);
|
||||
info_ptr->unknown_chunks = NULL;
|
||||
info_ptr->unknown_chunks_num = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_hIST_SUPPORTED)
|
||||
/* free any hIST entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
|
||||
#else
|
||||
if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->hist);
|
||||
info_ptr->hist = NULL;
|
||||
info_ptr->valid &= ~PNG_INFO_hIST;
|
||||
#ifndef PNG_FREE_ME_SUPPORTED
|
||||
png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
|
||||
/* free any PLTE entry that was internally allocated */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
|
||||
#else
|
||||
if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
|
||||
#endif
|
||||
{
|
||||
png_zfree(png_ptr, info_ptr->palette);
|
||||
info_ptr->palette = NULL;
|
||||
info_ptr->valid &= ~PNG_INFO_PLTE;
|
||||
#ifndef PNG_FREE_ME_SUPPORTED
|
||||
png_ptr->flags &= ~PNG_FLAG_FREE_PLTE;
|
||||
#endif
|
||||
info_ptr->num_palette = 0;
|
||||
}
|
||||
|
||||
#if defined(PNG_INFO_IMAGE_SUPPORTED)
|
||||
/* free any image bits attached to the info structure */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_ROWS)
|
||||
#endif
|
||||
{
|
||||
if(info_ptr->row_pointers)
|
||||
{
|
||||
int row;
|
||||
for (row = 0; row < (int)info_ptr->height; row++)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->row_pointers[row]);
|
||||
info_ptr->row_pointers[row]=NULL;
|
||||
}
|
||||
png_free(png_ptr, info_ptr->row_pointers);
|
||||
info_ptr->row_pointers=NULL;
|
||||
}
|
||||
info_ptr->valid &= ~PNG_INFO_IDAT;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if(num == -1)
|
||||
info_ptr->free_me &= ~mask;
|
||||
else
|
||||
info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* This is an internal routine to free any memory that the info struct is
|
||||
* pointing to before re-using it or freeing the struct itself. Recall
|
||||
* that png_free() checks for NULL pointers for us.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_info_destroy(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
png_debug(1, "in png_info_destroy\n");
|
||||
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
|
||||
|
||||
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
||||
if (png_ptr->num_chunk_list)
|
||||
{
|
||||
png_free(png_ptr, png_ptr->chunk_list);
|
||||
png_ptr->chunk_list=NULL;
|
||||
png_ptr->num_chunk_list=0;
|
||||
}
|
||||
#endif
|
||||
|
||||
png_info_init_3(&info_ptr, sizeof(png_info));
|
||||
}
|
||||
|
||||
/* This function returns a pointer to the io_ptr associated with the user
|
||||
* functions. The application should free any memory associated with this
|
||||
* pointer before png_write_destroy() or png_read_destroy() are called.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_io_ptr(png_structp png_ptr)
|
||||
{
|
||||
return (png_ptr->io_ptr);
|
||||
}
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
/* Initialize the default input/output functions for the PNG file. If you
|
||||
* use your own read or write routines, you can call either png_set_read_fn()
|
||||
* or png_set_write_fn() instead of png_init_io(). If you have defined
|
||||
* PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
|
||||
* necessarily available.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_init_io(png_structp png_ptr, png_FILE_p fp)
|
||||
{
|
||||
png_debug(1, "in png_init_io\n");
|
||||
png_ptr->io_ptr = (png_voidp)fp;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_TIME_RFC1123_SUPPORTED)
|
||||
/* Convert the supplied time into an RFC 1123 string suitable for use in
|
||||
* a "Creation Time" or other text-based time string.
|
||||
*/
|
||||
png_charp PNGAPI
|
||||
png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
|
||||
{
|
||||
static PNG_CONST char short_months[12][4] =
|
||||
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
||||
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
|
||||
|
||||
if (png_ptr->time_buffer == NULL)
|
||||
{
|
||||
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
|
||||
sizeof(char)));
|
||||
}
|
||||
|
||||
#if defined(_WIN32_WCE)
|
||||
{
|
||||
wchar_t time_buf[29];
|
||||
wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"),
|
||||
ptime->day % 32, short_months[(ptime->month - 1) % 12],
|
||||
ptime->year, ptime->hour % 24, ptime->minute % 60,
|
||||
ptime->second % 61);
|
||||
WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29,
|
||||
NULL, NULL);
|
||||
}
|
||||
#else
|
||||
#ifdef USE_FAR_KEYWORD
|
||||
{
|
||||
char near_time_buf[29];
|
||||
sprintf(near_time_buf, "%d %s %d %02d:%02d:%02d +0000",
|
||||
ptime->day % 32, short_months[(ptime->month - 1) % 12],
|
||||
ptime->year, ptime->hour % 24, ptime->minute % 60,
|
||||
ptime->second % 61);
|
||||
png_memcpy(png_ptr->time_buffer, near_time_buf,
|
||||
29*sizeof(char));
|
||||
}
|
||||
#else
|
||||
sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000",
|
||||
ptime->day % 32, short_months[(ptime->month - 1) % 12],
|
||||
ptime->year, ptime->hour % 24, ptime->minute % 60,
|
||||
ptime->second % 61);
|
||||
#endif
|
||||
#endif /* _WIN32_WCE */
|
||||
return ((png_charp)png_ptr->time_buffer);
|
||||
}
|
||||
#endif /* PNG_TIME_RFC1123_SUPPORTED */
|
||||
|
||||
#if 0
|
||||
/* Signature string for a PNG file. */
|
||||
png_bytep PNGAPI
|
||||
png_sig_bytes(void)
|
||||
{
|
||||
return ((png_bytep)"\211\120\116\107\015\012\032\012");
|
||||
}
|
||||
#endif
|
||||
|
||||
png_charp PNGAPI
|
||||
png_get_copyright(png_structp png_ptr)
|
||||
{
|
||||
if (png_ptr != NULL || png_ptr == NULL) /* silence compiler warning */
|
||||
return ((png_charp) "\n libpng version 1.2.5 - October 3, 2002\n\
|
||||
Copyright (c) 1998-2002 Glenn Randers-Pehrson\n\
|
||||
Copyright (c) 1996-1997 Andreas Dilger\n\
|
||||
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
|
||||
return ((png_charp) "");
|
||||
}
|
||||
|
||||
/* The following return the library version as a short string in the
|
||||
* format 1.0.0 through 99.99.99zz. To get the version of *.h files used
|
||||
* with your application, print out PNG_LIBPNG_VER_STRING, which is defined
|
||||
* in png.h.
|
||||
*/
|
||||
|
||||
png_charp PNGAPI
|
||||
png_get_libpng_ver(png_structp png_ptr)
|
||||
{
|
||||
/* Version of *.c files used when building libpng */
|
||||
if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
|
||||
return((png_charp) "1.2.5");
|
||||
return((png_charp) "1.2.5");
|
||||
}
|
||||
|
||||
png_charp PNGAPI
|
||||
png_get_header_ver(png_structp png_ptr)
|
||||
{
|
||||
/* Version of *.h files used when building libpng */
|
||||
if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
|
||||
return((png_charp) PNG_LIBPNG_VER_STRING);
|
||||
return((png_charp) PNG_LIBPNG_VER_STRING);
|
||||
}
|
||||
|
||||
png_charp PNGAPI
|
||||
png_get_header_version(png_structp png_ptr)
|
||||
{
|
||||
/* Returns longer string containing both version and date */
|
||||
if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
|
||||
return((png_charp) PNG_HEADER_VERSION_STRING);
|
||||
return((png_charp) PNG_HEADER_VERSION_STRING);
|
||||
}
|
||||
|
||||
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
|
||||
int PNGAPI
|
||||
png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
|
||||
{
|
||||
/* check chunk_name and return "keep" value if it's on the list, else 0 */
|
||||
int i;
|
||||
png_bytep p;
|
||||
if((png_ptr == NULL && chunk_name == NULL) || png_ptr->num_chunk_list<=0)
|
||||
return 0;
|
||||
p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5;
|
||||
for (i = png_ptr->num_chunk_list; i; i--, p-=5)
|
||||
if (!png_memcmp(chunk_name, p, 4))
|
||||
return ((int)*(p+4));
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This function, added to libpng-1.0.6g, is untested. */
|
||||
int PNGAPI
|
||||
png_reset_zstream(png_structp png_ptr)
|
||||
{
|
||||
return (inflateReset(&png_ptr->zstream));
|
||||
}
|
||||
|
||||
/* This function was added to libpng-1.0.7 */
|
||||
png_uint_32 PNGAPI
|
||||
png_access_version_number(void)
|
||||
{
|
||||
/* Version of *.c files used when building libpng */
|
||||
return((png_uint_32) 10205L);
|
||||
}
|
||||
|
||||
|
||||
#if !defined(PNG_1_0_X)
|
||||
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
||||
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
|
||||
/* this INTERNAL function was added to libpng 1.2.0 */
|
||||
void /* PRIVATE */
|
||||
png_init_mmx_flags (png_structp png_ptr)
|
||||
{
|
||||
png_ptr->mmx_rowbytes_threshold = 0;
|
||||
png_ptr->mmx_bitdepth_threshold = 0;
|
||||
|
||||
# if (defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD))
|
||||
|
||||
png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_COMPILED;
|
||||
|
||||
if (png_mmx_support() > 0) {
|
||||
png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
|
||||
# ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
|
||||
| PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
|
||||
# endif
|
||||
# ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
|
||||
| PNG_ASM_FLAG_MMX_READ_INTERLACE
|
||||
# endif
|
||||
# ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
|
||||
;
|
||||
# else
|
||||
| PNG_ASM_FLAG_MMX_READ_FILTER_SUB
|
||||
| PNG_ASM_FLAG_MMX_READ_FILTER_UP
|
||||
| PNG_ASM_FLAG_MMX_READ_FILTER_AVG
|
||||
| PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
|
||||
|
||||
png_ptr->mmx_rowbytes_threshold = PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT;
|
||||
png_ptr->mmx_bitdepth_threshold = PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT;
|
||||
# endif
|
||||
} else {
|
||||
png_ptr->asm_flags &= ~( PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
|
||||
| PNG_MMX_READ_FLAGS
|
||||
| PNG_MMX_WRITE_FLAGS );
|
||||
}
|
||||
|
||||
# else /* !((PNGVCRD || PNGGCCRD) && PNG_ASSEMBLER_CODE_SUPPORTED)) */
|
||||
|
||||
/* clear all MMX flags; no support is compiled in */
|
||||
png_ptr->asm_flags &= ~( PNG_MMX_FLAGS );
|
||||
|
||||
# endif /* ?(PNGVCRD || PNGGCCRD) */
|
||||
}
|
||||
|
||||
#endif /* !(PNG_ASSEMBLER_CODE_SUPPORTED) */
|
||||
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
#if !defined(PNG_USE_PNGGCCRD) && \
|
||||
!(defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD))
|
||||
int PNGAPI
|
||||
png_mmx_support(void)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
#endif
|
||||
#endif /* PNG_1_0_X */
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,11 @@
|
|||
/* pngasmrd.h - assembler version of utilities to read a PNG file
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 2002 Glenn Randers-Pehrson
|
||||
*
|
||||
*/
|
||||
|
||||
/* This file is obsolete in libpng-1.0.9 and later; its contents now appear
|
||||
* at the end of pngconf.h.
|
||||
*/
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,291 @@
|
|||
|
||||
/* pngerror.c - stub functions for i/o and memory allocation
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2002 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 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.
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
static void /* PRIVATE */
|
||||
png_default_error PNGARG((png_structp png_ptr,
|
||||
png_const_charp error_message));
|
||||
static void /* PRIVATE */
|
||||
png_default_warning PNGARG((png_structp png_ptr,
|
||||
png_const_charp warning_message));
|
||||
|
||||
/* 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.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_error(png_structp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
char msg[16];
|
||||
if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
|
||||
{
|
||||
int offset = 0;
|
||||
if (*error_message == '#')
|
||||
{
|
||||
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]='\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->error_fn != NULL)
|
||||
(*(png_ptr->error_fn))(png_ptr, error_message);
|
||||
|
||||
/* if the following returns or doesn't exist, use the default function,
|
||||
which will not return */
|
||||
png_default_error(png_ptr, error_message);
|
||||
}
|
||||
|
||||
/* 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_structp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
int offset = 0;
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
|
||||
#endif
|
||||
{
|
||||
if (*warning_message == '#')
|
||||
{
|
||||
for (offset=1; offset<15; offset++)
|
||||
if (*(warning_message+offset) == ' ')
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (png_ptr->warning_fn != NULL)
|
||||
(*(png_ptr->warning_fn))(png_ptr,
|
||||
(png_const_charp)(warning_message+offset));
|
||||
else
|
||||
png_default_warning(png_ptr, (png_const_charp)(warning_message+offset));
|
||||
}
|
||||
|
||||
/* 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) < 41 || (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' };
|
||||
|
||||
static void /* PRIVATE */
|
||||
png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
|
||||
error_message)
|
||||
{
|
||||
int iout = 0, iin = 0;
|
||||
|
||||
while (iin < 4)
|
||||
{
|
||||
int c = png_ptr->chunk_name[iin++];
|
||||
if (isnonalpha(c))
|
||||
{
|
||||
buffer[iout++] = '[';
|
||||
buffer[iout++] = png_digit[(c & 0xf0) >> 4];
|
||||
buffer[iout++] = png_digit[c & 0x0f];
|
||||
buffer[iout++] = ']';
|
||||
}
|
||||
else
|
||||
{
|
||||
buffer[iout++] = (png_byte)c;
|
||||
}
|
||||
}
|
||||
|
||||
if (error_message == NULL)
|
||||
buffer[iout] = 0;
|
||||
else
|
||||
{
|
||||
buffer[iout++] = ':';
|
||||
buffer[iout++] = ' ';
|
||||
png_memcpy(buffer+iout, error_message, 64);
|
||||
buffer[iout+63] = 0;
|
||||
}
|
||||
}
|
||||
|
||||
void PNGAPI
|
||||
png_chunk_error(png_structp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
char msg[18+64];
|
||||
png_format_buffer(png_ptr, msg, error_message);
|
||||
png_error(png_ptr, msg);
|
||||
}
|
||||
|
||||
void PNGAPI
|
||||
png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
char msg[18+64];
|
||||
png_format_buffer(png_ptr, msg, warning_message);
|
||||
png_warning(png_ptr, msg);
|
||||
}
|
||||
|
||||
/* 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 void /* PRIVATE */
|
||||
png_default_error(png_structp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
#ifndef PNG_NO_CONSOLE_IO
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (*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\n", error_number,
|
||||
error_message+offset);
|
||||
}
|
||||
else
|
||||
fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
fprintf(stderr, "libpng error: %s\n", error_message);
|
||||
#else
|
||||
if (error_message)
|
||||
/* make compiler happy */ ;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
# ifdef USE_FAR_KEYWORD
|
||||
{
|
||||
jmp_buf jmpbuf;
|
||||
png_memcpy(jmpbuf,png_ptr->jmpbuf,sizeof(jmp_buf));
|
||||
longjmp(jmpbuf, 1);
|
||||
}
|
||||
# else
|
||||
longjmp(png_ptr->jmpbuf, 1);
|
||||
# endif
|
||||
#else
|
||||
if (png_ptr)
|
||||
/* make compiler happy */ ;
|
||||
PNG_ABORT();
|
||||
#endif
|
||||
}
|
||||
|
||||
/* 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_structp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
#ifndef PNG_NO_CONSOLE_IO
|
||||
# ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (*warning_message == '#')
|
||||
{
|
||||
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\n", warning_number,
|
||||
warning_message+offset);
|
||||
}
|
||||
else
|
||||
fprintf(stderr, "libpng warning: %s\n", warning_message);
|
||||
}
|
||||
else
|
||||
# endif
|
||||
fprintf(stderr, "libpng warning: %s\n", warning_message);
|
||||
#else
|
||||
if (warning_message)
|
||||
/* appease compiler */ ;
|
||||
#endif
|
||||
if (png_ptr)
|
||||
return;
|
||||
}
|
||||
|
||||
/* 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->jmpbuf, 1)
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
|
||||
png_error_ptr error_fn, png_error_ptr warning_fn)
|
||||
{
|
||||
png_ptr->error_ptr = error_ptr;
|
||||
png_ptr->error_fn = error_fn;
|
||||
png_ptr->warning_fn = warning_fn;
|
||||
}
|
||||
|
||||
|
||||
/* 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_structp png_ptr)
|
||||
{
|
||||
return ((png_voidp)png_ptr->error_ptr);
|
||||
}
|
||||
|
||||
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
void PNGAPI
|
||||
png_set_strip_error_numbers(png_structp 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
|
||||
|
|
@ -0,0 +1,927 @@
|
|||
|
||||
/* pngget.c - retrieval of values from info struct
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2002 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.)
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->valid & flag);
|
||||
else
|
||||
return(0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->rowbytes);
|
||||
else
|
||||
return(0);
|
||||
}
|
||||
|
||||
#if defined(PNG_INFO_IMAGE_SUPPORTED)
|
||||
png_bytepp PNGAPI
|
||||
png_get_rows(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->row_pointers);
|
||||
else
|
||||
return(0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_EASY_ACCESS_SUPPORTED
|
||||
/* easy access to info, added in libpng-0.99 */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_image_width(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->width;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_image_height(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->height;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->bit_depth;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_color_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->color_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->filter_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->interlace_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->compression_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
|
||||
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
|
||||
return (0);
|
||||
else return (info_ptr->x_pixels_per_unit);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
|
||||
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
|
||||
return (0);
|
||||
else return (info_ptr->y_pixels_per_unit);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
|
||||
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
|
||||
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
|
||||
return (0);
|
||||
else return (info_ptr->x_pixels_per_unit);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
float PNGAPI
|
||||
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
|
||||
if (info_ptr->x_pixels_per_unit == 0)
|
||||
return ((float)0.0);
|
||||
else
|
||||
return ((float)((float)info_ptr->y_pixels_per_unit
|
||||
/(float)info_ptr->x_pixels_per_unit));
|
||||
}
|
||||
#else
|
||||
return (0.0);
|
||||
#endif
|
||||
return ((float)0.0);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
|
||||
return (0);
|
||||
else return (info_ptr->x_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
|
||||
return (0);
|
||||
else return (info_ptr->y_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
|
||||
return (0);
|
||||
else return (info_ptr->x_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
|
||||
return (0);
|
||||
else return (info_ptr->y_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
|
||||
*.0254 +.5));
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
|
||||
*.0254 +.5));
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
|
||||
*.0254 +.5));
|
||||
}
|
||||
|
||||
float PNGAPI
|
||||
png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
|
||||
*.00003937);
|
||||
}
|
||||
|
||||
float PNGAPI
|
||||
png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
|
||||
*.00003937);
|
||||
}
|
||||
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
|
||||
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
|
||||
{
|
||||
png_uint_32 retval = 0;
|
||||
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "pHYs");
|
||||
if (res_x != NULL)
|
||||
{
|
||||
*res_x = info_ptr->x_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (res_y != NULL)
|
||||
{
|
||||
*res_y = info_ptr->y_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (unit_type != NULL)
|
||||
{
|
||||
*unit_type = (int)info_ptr->phys_unit_type;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
if(*unit_type == 1)
|
||||
{
|
||||
if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
|
||||
if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
|
||||
}
|
||||
}
|
||||
}
|
||||
return (retval);
|
||||
}
|
||||
#endif /* PNG_pHYs_SUPPORTED */
|
||||
#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
|
||||
|
||||
/* png_get_channels really belongs in here, too, but it's been around longer */
|
||||
|
||||
#endif /* PNG_EASY_ACCESS_SUPPORTED */
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_channels(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->channels);
|
||||
else
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_bytep PNGAPI
|
||||
png_get_signature(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->signature);
|
||||
else
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
#if defined(PNG_bKGD_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
|
||||
png_color_16p *background)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
|
||||
&& background != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "bKGD");
|
||||
*background = &(info_ptr->background);
|
||||
return (PNG_INFO_bKGD);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_cHRM_SUPPORTED)
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
|
||||
double *white_x, double *white_y, double *red_x, double *red_y,
|
||||
double *green_x, double *green_y, double *blue_x, double *blue_y)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "cHRM");
|
||||
if (white_x != NULL)
|
||||
*white_x = (double)info_ptr->x_white;
|
||||
if (white_y != NULL)
|
||||
*white_y = (double)info_ptr->y_white;
|
||||
if (red_x != NULL)
|
||||
*red_x = (double)info_ptr->x_red;
|
||||
if (red_y != NULL)
|
||||
*red_y = (double)info_ptr->y_red;
|
||||
if (green_x != NULL)
|
||||
*green_x = (double)info_ptr->x_green;
|
||||
if (green_y != NULL)
|
||||
*green_y = (double)info_ptr->y_green;
|
||||
if (blue_x != NULL)
|
||||
*blue_x = (double)info_ptr->x_blue;
|
||||
if (blue_y != NULL)
|
||||
*blue_y = (double)info_ptr->y_blue;
|
||||
return (PNG_INFO_cHRM);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#ifdef PNG_FIXED_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
|
||||
png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
|
||||
png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
|
||||
png_fixed_point *blue_x, png_fixed_point *blue_y)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "cHRM");
|
||||
if (white_x != NULL)
|
||||
*white_x = info_ptr->int_x_white;
|
||||
if (white_y != NULL)
|
||||
*white_y = info_ptr->int_y_white;
|
||||
if (red_x != NULL)
|
||||
*red_x = info_ptr->int_x_red;
|
||||
if (red_y != NULL)
|
||||
*red_y = info_ptr->int_y_red;
|
||||
if (green_x != NULL)
|
||||
*green_x = info_ptr->int_x_green;
|
||||
if (green_y != NULL)
|
||||
*green_y = info_ptr->int_y_green;
|
||||
if (blue_x != NULL)
|
||||
*blue_x = info_ptr->int_x_blue;
|
||||
if (blue_y != NULL)
|
||||
*blue_y = info_ptr->int_y_blue;
|
||||
return (PNG_INFO_cHRM);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if defined(PNG_gAMA_SUPPORTED)
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
||||
&& file_gamma != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "gAMA");
|
||||
*file_gamma = (double)info_ptr->gamma;
|
||||
return (PNG_INFO_gAMA);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#ifdef PNG_FIXED_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
|
||||
png_fixed_point *int_file_gamma)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
||||
&& int_file_gamma != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "gAMA");
|
||||
*int_file_gamma = info_ptr->int_gamma;
|
||||
return (PNG_INFO_gAMA);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sRGB_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
|
||||
&& file_srgb_intent != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "sRGB");
|
||||
*file_srgb_intent = (int)info_ptr->srgb_intent;
|
||||
return (PNG_INFO_sRGB);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_iCCP_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
|
||||
png_charpp name, int *compression_type,
|
||||
png_charpp profile, png_uint_32 *proflen)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
|
||||
&& name != NULL && profile != NULL && proflen != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "iCCP");
|
||||
*name = info_ptr->iccp_name;
|
||||
*profile = info_ptr->iccp_profile;
|
||||
/* compression_type is a dummy so the API won't have to change
|
||||
if we introduce multiple compression types later. */
|
||||
*proflen = (int)info_ptr->iccp_proflen;
|
||||
*compression_type = (int)info_ptr->iccp_compression;
|
||||
return (PNG_INFO_iCCP);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sPLT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
|
||||
png_sPLT_tpp spalettes)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
|
||||
*spalettes = info_ptr->splt_palettes;
|
||||
return ((png_uint_32)info_ptr->splt_palettes_num);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_hIST_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
|
||||
&& hist != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "hIST");
|
||||
*hist = info_ptr->hist;
|
||||
return (PNG_INFO_hIST);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
|
||||
png_uint_32 *width, png_uint_32 *height, int *bit_depth,
|
||||
int *color_type, int *interlace_type, int *compression_type,
|
||||
int *filter_type)
|
||||
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
|
||||
bit_depth != NULL && color_type != NULL)
|
||||
{
|
||||
int pixel_depth, channels;
|
||||
png_uint_32 rowbytes_per_pixel;
|
||||
|
||||
png_debug1(1, "in %s retrieval function\n", "IHDR");
|
||||
*width = info_ptr->width;
|
||||
*height = info_ptr->height;
|
||||
*bit_depth = info_ptr->bit_depth;
|
||||
if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
|
||||
png_error(png_ptr, "Invalid bit depth");
|
||||
*color_type = info_ptr->color_type;
|
||||
if (info_ptr->color_type > 6)
|
||||
png_error(png_ptr, "Invalid color type");
|
||||
if (compression_type != NULL)
|
||||
*compression_type = info_ptr->compression_type;
|
||||
if (filter_type != NULL)
|
||||
*filter_type = info_ptr->filter_type;
|
||||
if (interlace_type != NULL)
|
||||
*interlace_type = info_ptr->interlace_type;
|
||||
|
||||
/* check for potential overflow of rowbytes */
|
||||
if (*color_type == PNG_COLOR_TYPE_PALETTE)
|
||||
channels = 1;
|
||||
else if (*color_type & PNG_COLOR_MASK_COLOR)
|
||||
channels = 3;
|
||||
else
|
||||
channels = 1;
|
||||
if (*color_type & PNG_COLOR_MASK_ALPHA)
|
||||
channels++;
|
||||
pixel_depth = *bit_depth * channels;
|
||||
rowbytes_per_pixel = (pixel_depth + 7) >> 3;
|
||||
if (width == 0 || *width > PNG_MAX_UINT)
|
||||
png_error(png_ptr, "Invalid image width");
|
||||
if (height == 0 || *height > PNG_MAX_UINT)
|
||||
png_error(png_ptr, "Invalid image height");
|
||||
if (*width > PNG_MAX_UINT/rowbytes_per_pixel - 64)
|
||||
{
|
||||
png_error(png_ptr,
|
||||
"Width too large for libpng to process image data.");
|
||||
}
|
||||
return (1);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
|
||||
png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
|
||||
&& offset_x != NULL && offset_y != NULL && unit_type != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "oFFs");
|
||||
*offset_x = info_ptr->x_offset;
|
||||
*offset_y = info_ptr->y_offset;
|
||||
*unit_type = (int)info_ptr->offset_unit_type;
|
||||
return (PNG_INFO_oFFs);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_pCAL_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
|
||||
png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
|
||||
png_charp *units, png_charpp *params)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
|
||||
&& purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
|
||||
nparams != NULL && units != NULL && params != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "pCAL");
|
||||
*purpose = info_ptr->pcal_purpose;
|
||||
*X0 = info_ptr->pcal_X0;
|
||||
*X1 = info_ptr->pcal_X1;
|
||||
*type = (int)info_ptr->pcal_type;
|
||||
*nparams = (int)info_ptr->pcal_nparams;
|
||||
*units = info_ptr->pcal_units;
|
||||
*params = info_ptr->pcal_params;
|
||||
return (PNG_INFO_pCAL);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sCAL_SUPPORTED)
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
|
||||
int *unit, double *width, double *height)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL &&
|
||||
(info_ptr->valid & PNG_INFO_sCAL))
|
||||
{
|
||||
*unit = info_ptr->scal_unit;
|
||||
*width = info_ptr->scal_pixel_width;
|
||||
*height = info_ptr->scal_pixel_height;
|
||||
return (PNG_INFO_sCAL);
|
||||
}
|
||||
return(0);
|
||||
}
|
||||
#else
|
||||
#ifdef PNG_FIXED_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
|
||||
int *unit, png_charpp width, png_charpp height)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL &&
|
||||
(info_ptr->valid & PNG_INFO_sCAL))
|
||||
{
|
||||
*unit = info_ptr->scal_unit;
|
||||
*width = info_ptr->scal_s_width;
|
||||
*height = info_ptr->scal_s_height;
|
||||
return (PNG_INFO_sCAL);
|
||||
}
|
||||
return(0);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
|
||||
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
|
||||
{
|
||||
png_uint_32 retval = 0;
|
||||
|
||||
if (png_ptr != NULL && info_ptr != NULL &&
|
||||
(info_ptr->valid & PNG_INFO_pHYs))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "pHYs");
|
||||
if (res_x != NULL)
|
||||
{
|
||||
*res_x = info_ptr->x_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (res_y != NULL)
|
||||
{
|
||||
*res_y = info_ptr->y_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (unit_type != NULL)
|
||||
{
|
||||
*unit_type = (int)info_ptr->phys_unit_type;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
}
|
||||
return (retval);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
|
||||
int *num_palette)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
|
||||
&& palette != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "PLTE");
|
||||
*palette = info_ptr->palette;
|
||||
*num_palette = info_ptr->num_palette;
|
||||
png_debug1(3, "num_palette = %d\n", *num_palette);
|
||||
return (PNG_INFO_PLTE);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
#if defined(PNG_sBIT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
|
||||
&& sig_bit != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "sBIT");
|
||||
*sig_bit = &(info_ptr->sig_bit);
|
||||
return (PNG_INFO_sBIT);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_TEXT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
|
||||
int *num_text)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n",
|
||||
(png_ptr->chunk_name[0] == '\0' ? "text"
|
||||
: (png_const_charp)png_ptr->chunk_name));
|
||||
if (text_ptr != NULL)
|
||||
*text_ptr = info_ptr->text;
|
||||
if (num_text != NULL)
|
||||
*num_text = info_ptr->num_text;
|
||||
return ((png_uint_32)info_ptr->num_text);
|
||||
}
|
||||
if (num_text != NULL)
|
||||
*num_text = 0;
|
||||
return(0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tIME_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
|
||||
&& mod_time != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "tIME");
|
||||
*mod_time = &(info_ptr->mod_time);
|
||||
return (PNG_INFO_tIME);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tRNS_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
|
||||
png_bytep *trans, int *num_trans, png_color_16p *trans_values)
|
||||
{
|
||||
png_uint_32 retval = 0;
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "tRNS");
|
||||
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
||||
{
|
||||
if (trans != NULL)
|
||||
{
|
||||
*trans = info_ptr->trans;
|
||||
retval |= PNG_INFO_tRNS;
|
||||
}
|
||||
if (trans_values != NULL)
|
||||
*trans_values = &(info_ptr->trans_values);
|
||||
}
|
||||
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
|
||||
{
|
||||
if (trans_values != NULL)
|
||||
{
|
||||
*trans_values = &(info_ptr->trans_values);
|
||||
retval |= PNG_INFO_tRNS;
|
||||
}
|
||||
if(trans != NULL)
|
||||
*trans = NULL;
|
||||
}
|
||||
if(num_trans != NULL)
|
||||
{
|
||||
*num_trans = info_ptr->num_trans;
|
||||
retval |= PNG_INFO_tRNS;
|
||||
}
|
||||
}
|
||||
return (retval);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
|
||||
png_unknown_chunkpp unknowns)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
|
||||
*unknowns = info_ptr->unknown_chunks;
|
||||
return ((png_uint_32)info_ptr->unknown_chunks_num);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
|
||||
png_byte PNGAPI
|
||||
png_get_rgb_to_gray_status (png_structp png_ptr)
|
||||
{
|
||||
return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_USER_CHUNKS_SUPPORTED)
|
||||
png_voidp PNGAPI
|
||||
png_get_user_chunk_ptr(png_structp png_ptr)
|
||||
{
|
||||
return (png_ptr? png_ptr->user_chunk_ptr : NULL);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_compression_buffer_size(png_structp png_ptr)
|
||||
{
|
||||
return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
|
||||
}
|
||||
|
||||
|
||||
#ifndef PNG_1_0_X
|
||||
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
||||
/* this function was added to libpng 1.2.0 and should exist by default */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_asm_flags (png_structp png_ptr)
|
||||
{
|
||||
return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
|
||||
}
|
||||
|
||||
/* this function was added to libpng 1.2.0 and should exist by default */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_asm_flagmask (int flag_select)
|
||||
{
|
||||
png_uint_32 settable_asm_flags = 0;
|
||||
|
||||
if (flag_select & PNG_SELECT_READ)
|
||||
settable_asm_flags |=
|
||||
PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
|
||||
PNG_ASM_FLAG_MMX_READ_INTERLACE |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_UP |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
|
||||
/* no non-MMX flags yet */
|
||||
|
||||
#if 0
|
||||
/* GRR: no write-flags yet, either, but someday... */
|
||||
if (flag_select & PNG_SELECT_WRITE)
|
||||
settable_asm_flags |=
|
||||
PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
|
||||
#endif /* 0 */
|
||||
|
||||
return settable_asm_flags; /* _theoretically_ settable capabilities only */
|
||||
}
|
||||
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
||||
|
||||
|
||||
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
||||
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_mmx_flagmask (int flag_select, int *compilerID)
|
||||
{
|
||||
png_uint_32 settable_mmx_flags = 0;
|
||||
|
||||
if (flag_select & PNG_SELECT_READ)
|
||||
settable_mmx_flags |=
|
||||
PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
|
||||
PNG_ASM_FLAG_MMX_READ_INTERLACE |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_UP |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
|
||||
PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
|
||||
#if 0
|
||||
/* GRR: no MMX write support yet, but someday... */
|
||||
if (flag_select & PNG_SELECT_WRITE)
|
||||
settable_mmx_flags |=
|
||||
PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
|
||||
#endif /* 0 */
|
||||
|
||||
if (compilerID != NULL) {
|
||||
#ifdef PNG_USE_PNGVCRD
|
||||
*compilerID = 1; /* MSVC */
|
||||
#else
|
||||
#ifdef PNG_USE_PNGGCCRD
|
||||
*compilerID = 2; /* gcc/gas */
|
||||
#else
|
||||
*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
return settable_mmx_flags; /* _theoretically_ settable capabilities only */
|
||||
}
|
||||
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
png_byte PNGAPI
|
||||
png_get_mmx_bitdepth_threshold (png_structp png_ptr)
|
||||
{
|
||||
return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
|
||||
}
|
||||
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_mmx_rowbytes_threshold (png_structp png_ptr)
|
||||
{
|
||||
return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
|
||||
}
|
||||
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
||||
#endif /* PNG_1_0_X */
|
||||
|
|
@ -0,0 +1,566 @@
|
|||
|
||||
/* pngmem.c - stub functions for memory allocation
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2002 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 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.
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
/* Borland DOS special memory handler */
|
||||
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
|
||||
/* if you change this, be sure to change the one in png.h also */
|
||||
|
||||
/* Allocate memory for a png_struct. The malloc and memset can be replaced
|
||||
by a single call to calloc() if this is thought to improve performance. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct(int type)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
|
||||
}
|
||||
|
||||
/* Alternate version of png_create_struct, for use with user-defined malloc. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
png_size_t size;
|
||||
png_voidp struct_ptr;
|
||||
|
||||
if (type == PNG_STRUCT_INFO)
|
||||
size = sizeof(png_info);
|
||||
else if (type == PNG_STRUCT_PNG)
|
||||
size = sizeof(png_struct);
|
||||
else
|
||||
return (png_get_copyright());
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(malloc_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
|
||||
}
|
||||
else
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
struct_ptr = (png_voidp)farmalloc(size));
|
||||
if (struct_ptr != NULL)
|
||||
png_memset(struct_ptr, 0, size);
|
||||
return (struct_ptr);
|
||||
}
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct(png_voidp struct_ptr)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
|
||||
}
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
|
||||
png_voidp mem_ptr)
|
||||
{
|
||||
#endif
|
||||
if (struct_ptr != NULL)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(free_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
(*(free_fn))(png_ptr, struct_ptr);
|
||||
return;
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
farfree (struct_ptr);
|
||||
}
|
||||
}
|
||||
|
||||
/* 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.
|
||||
*
|
||||
* Borland seems to have a problem in DOS mode for exactly 64K.
|
||||
* It gives you a segment with an offset of 8 (perhaps to store its
|
||||
* memory stuff). zlib doesn't like this at all, so we have to
|
||||
* detect and deal with it. This code should not be needed in
|
||||
* Windows or OS/2 modes, and only in 16 bit mode. This code has
|
||||
* been updated by Alexander Lehmann for version 0.89 to waste less
|
||||
* memory.
|
||||
*
|
||||
* Note that we can't use png_size_t for the "size" declaration,
|
||||
* since on some systems a png_size_t is a 16-bit quantity, and as a
|
||||
* result, we would be truncating potentially larger memory requests
|
||||
* (which should cause a fatal error) and introducing major problems.
|
||||
*/
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_malloc(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
|
||||
if (png_ptr == NULL || size == 0)
|
||||
return (NULL);
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(png_ptr->malloc_fn != NULL)
|
||||
{
|
||||
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
|
||||
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of memory!");
|
||||
return (ret);
|
||||
}
|
||||
else
|
||||
return png_malloc_default(png_ptr, size);
|
||||
}
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_malloc_default(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
#ifdef PNG_MAX_MALLOC_64K
|
||||
if (size > (png_uint_32)65536L)
|
||||
png_error(png_ptr, "Cannot Allocate > 64K");
|
||||
#endif
|
||||
|
||||
if (size == (png_uint_32)65536L)
|
||||
{
|
||||
if (png_ptr->offset_table == NULL)
|
||||
{
|
||||
/* try to see if we need to do any of this fancy stuff */
|
||||
ret = farmalloc(size);
|
||||
if (ret == NULL || ((png_size_t)ret & 0xffff))
|
||||
{
|
||||
int num_blocks;
|
||||
png_uint_32 total_size;
|
||||
png_bytep table;
|
||||
int i;
|
||||
png_byte huge * hptr;
|
||||
|
||||
if (ret != NULL)
|
||||
{
|
||||
farfree(ret);
|
||||
ret = NULL;
|
||||
}
|
||||
|
||||
if(png_ptr->zlib_window_bits > 14)
|
||||
num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
|
||||
else
|
||||
num_blocks = 1;
|
||||
if (png_ptr->zlib_mem_level >= 7)
|
||||
num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7));
|
||||
else
|
||||
num_blocks++;
|
||||
|
||||
total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16;
|
||||
|
||||
table = farmalloc(total_size);
|
||||
|
||||
if (table == NULL)
|
||||
{
|
||||
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */
|
||||
else
|
||||
png_warning(png_ptr, "Out Of Memory.");
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
if ((png_size_t)table & 0xfff0)
|
||||
{
|
||||
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr,
|
||||
"Farmalloc didn't return normalized pointer");
|
||||
else
|
||||
png_warning(png_ptr,
|
||||
"Farmalloc didn't return normalized pointer");
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
png_ptr->offset_table = table;
|
||||
png_ptr->offset_table_ptr = farmalloc(num_blocks *
|
||||
sizeof (png_bytep));
|
||||
|
||||
if (png_ptr->offset_table_ptr == NULL)
|
||||
{
|
||||
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out Of memory."); /* Note "O" and "M" */
|
||||
else
|
||||
png_warning(png_ptr, "Out Of memory.");
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
hptr = (png_byte huge *)table;
|
||||
if ((png_size_t)hptr & 0xf)
|
||||
{
|
||||
hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
|
||||
hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */
|
||||
}
|
||||
for (i = 0; i < num_blocks; i++)
|
||||
{
|
||||
png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
|
||||
hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */
|
||||
}
|
||||
|
||||
png_ptr->offset_table_number = num_blocks;
|
||||
png_ptr->offset_table_count = 0;
|
||||
png_ptr->offset_table_count_free = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
|
||||
{
|
||||
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of Memory."); /* Note "o" and "M" */
|
||||
else
|
||||
png_warning(png_ptr, "Out of Memory.");
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
|
||||
}
|
||||
else
|
||||
ret = farmalloc(size);
|
||||
|
||||
if (ret == NULL)
|
||||
{
|
||||
if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
|
||||
else
|
||||
png_warning(png_ptr, "Out of memory."); /* Note "o" and "m" */
|
||||
}
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/* free a pointer allocated by png_malloc(). In the default
|
||||
configuration, png_ptr is not used, but is passed in case it
|
||||
is needed. If ptr is NULL, return without taking any action. */
|
||||
void PNGAPI
|
||||
png_free(png_structp 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_ptr, ptr);
|
||||
return;
|
||||
}
|
||||
else png_free_default(png_ptr, ptr);
|
||||
}
|
||||
|
||||
void PNGAPI
|
||||
png_free_default(png_structp png_ptr, png_voidp ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
if (png_ptr->offset_table != NULL)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < png_ptr->offset_table_count; i++)
|
||||
{
|
||||
if (ptr == png_ptr->offset_table_ptr[i])
|
||||
{
|
||||
ptr = NULL;
|
||||
png_ptr->offset_table_count_free++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (png_ptr->offset_table_count_free == png_ptr->offset_table_count)
|
||||
{
|
||||
farfree(png_ptr->offset_table);
|
||||
farfree(png_ptr->offset_table_ptr);
|
||||
png_ptr->offset_table = NULL;
|
||||
png_ptr->offset_table_ptr = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
if (ptr != NULL)
|
||||
{
|
||||
farfree(ptr);
|
||||
}
|
||||
}
|
||||
|
||||
#else /* Not the Borland DOS special memory handler */
|
||||
|
||||
/* Allocate memory for a png_struct or a png_info. The malloc and
|
||||
memset can be replaced by a single call to calloc() if this is thought
|
||||
to improve performance noticably. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct(int type)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
|
||||
}
|
||||
|
||||
/* Allocate memory for a png_struct or a png_info. The malloc and
|
||||
memset can be replaced by a single call to calloc() if this is thought
|
||||
to improve performance noticably. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
png_size_t size;
|
||||
png_voidp struct_ptr;
|
||||
|
||||
if (type == PNG_STRUCT_INFO)
|
||||
size = sizeof(png_info);
|
||||
else if (type == PNG_STRUCT_PNG)
|
||||
size = sizeof(png_struct);
|
||||
else
|
||||
return (NULL);
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(malloc_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
struct_ptr = (*(malloc_fn))(png_ptr, size);
|
||||
if (struct_ptr != NULL)
|
||||
png_memset(struct_ptr, 0, size);
|
||||
return (struct_ptr);
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL)
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
if ((struct_ptr = (png_voidp)halloc(size,1)) != NULL)
|
||||
# else
|
||||
if ((struct_ptr = (png_voidp)malloc(size)) != NULL)
|
||||
# endif
|
||||
#endif
|
||||
{
|
||||
png_memset(struct_ptr, 0, size);
|
||||
}
|
||||
|
||||
return (struct_ptr);
|
||||
}
|
||||
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct(png_voidp struct_ptr)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
|
||||
}
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
|
||||
png_voidp mem_ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
if (struct_ptr != NULL)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(free_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
(*(free_fn))(png_ptr, struct_ptr);
|
||||
return;
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
farfree(struct_ptr);
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
hfree(struct_ptr);
|
||||
# else
|
||||
free(struct_ptr);
|
||||
# endif
|
||||
#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_voidp PNGAPI
|
||||
png_malloc(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
|
||||
if (png_ptr == NULL || size == 0)
|
||||
return (NULL);
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(png_ptr->malloc_fn != NULL)
|
||||
{
|
||||
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
|
||||
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of Memory!");
|
||||
return (ret);
|
||||
}
|
||||
else
|
||||
return (png_malloc_default(png_ptr, size));
|
||||
}
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_malloc_default(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
#ifdef PNG_MAX_MALLOC_64K
|
||||
if (size > (png_uint_32)65536L)
|
||||
{
|
||||
if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Cannot Allocate > 64K");
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
ret = farmalloc(size);
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
ret = halloc(size, 1);
|
||||
# else
|
||||
ret = malloc((size_t)size);
|
||||
# endif
|
||||
#endif
|
||||
|
||||
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of Memory");
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/* Free a pointer allocated by png_malloc(). If ptr is NULL, return
|
||||
without taking any action. */
|
||||
void PNGAPI
|
||||
png_free(png_structp 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_ptr, ptr);
|
||||
return;
|
||||
}
|
||||
else png_free_default(png_ptr, ptr);
|
||||
}
|
||||
void PNGAPI
|
||||
png_free_default(png_structp png_ptr, png_voidp ptr)
|
||||
{
|
||||
if (png_ptr == NULL || ptr == NULL)
|
||||
return;
|
||||
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
farfree(ptr);
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
hfree(ptr);
|
||||
# else
|
||||
free(ptr);
|
||||
# endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif /* Not Borland DOS special memory handler */
|
||||
|
||||
#if defined(PNG_1_0_X)
|
||||
# define png_malloc_warn png_malloc
|
||||
#else
|
||||
/* 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_voidp PNGAPI
|
||||
png_malloc_warn(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ptr;
|
||||
png_uint_32 save_flags=png_ptr->flags;
|
||||
|
||||
png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
|
||||
ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
|
||||
png_ptr->flags=save_flags;
|
||||
return(ptr);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
|
||||
png_uint_32 length)
|
||||
{
|
||||
png_size_t size;
|
||||
|
||||
size = (png_size_t)length;
|
||||
if ((png_uint_32)size != length)
|
||||
png_error(png_ptr,"Overflow in png_memcpy_check.");
|
||||
|
||||
return(png_memcpy (s1, s2, size));
|
||||
}
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_memset_check (png_structp png_ptr, png_voidp s1, int value,
|
||||
png_uint_32 length)
|
||||
{
|
||||
png_size_t size;
|
||||
|
||||
size = (png_size_t)length;
|
||||
if ((png_uint_32)size != length)
|
||||
png_error(png_ptr,"Overflow in png_memset_check.");
|
||||
|
||||
return (png_memset (s1, value, size));
|
||||
|
||||
}
|
||||
|
||||
#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_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
|
||||
malloc_fn, png_free_ptr free_fn)
|
||||
{
|
||||
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_structp png_ptr)
|
||||
{
|
||||
return ((png_voidp)png_ptr->mem_ptr);
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,161 @@
|
|||
|
||||
/* pngrio.c - functions for data input
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2002 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 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(...).
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
/* 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_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_debug1(4,"reading %d bytes\n", (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");
|
||||
}
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
/* 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. */
|
||||
#ifndef USE_FAR_KEYWORD
|
||||
void PNGAPI
|
||||
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_size_t check;
|
||||
|
||||
/* 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.
|
||||
*/
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = (png_size_t)fread(data, (png_size_t)1, length,
|
||||
(png_FILE_p)png_ptr->io_ptr);
|
||||
#endif
|
||||
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Read Error");
|
||||
}
|
||||
#else
|
||||
/* this is the model-independent version. Since the standard I/O library
|
||||
can't handle far buffers in the medium and small models, we have to copy
|
||||
the data.
|
||||
*/
|
||||
|
||||
#define NEAR_BUF_SIZE 1024
|
||||
#define MIN(a,b) (a <= b ? a : b)
|
||||
|
||||
static void /* PRIVATE */
|
||||
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
int check;
|
||||
png_byte *n_data;
|
||||
png_FILE_p io_ptr;
|
||||
|
||||
/* Check if data really is near. If so, use usual code. */
|
||||
n_data = (png_byte *)CVT_PTR_NOCHECK(data);
|
||||
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
|
||||
if ((png_bytep)n_data == data)
|
||||
{
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = fread(n_data, 1, length, io_ptr);
|
||||
#endif
|
||||
}
|
||||
else
|
||||
{
|
||||
png_byte buf[NEAR_BUF_SIZE];
|
||||
png_size_t read, remaining, err;
|
||||
check = 0;
|
||||
remaining = length;
|
||||
do
|
||||
{
|
||||
read = MIN(NEAR_BUF_SIZE, remaining);
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !ReadFile((HANDLE)(io_ptr), buf, read, &err, NULL) )
|
||||
err = 0;
|
||||
#else
|
||||
err = fread(buf, (png_size_t)1, read, io_ptr);
|
||||
#endif
|
||||
png_memcpy(data, buf, read); /* copy far buffer to near buffer */
|
||||
if(err != read)
|
||||
break;
|
||||
else
|
||||
check += err;
|
||||
data += read;
|
||||
remaining -= read;
|
||||
}
|
||||
while (remaining != 0);
|
||||
}
|
||||
if ((png_uint_32)check != (png_uint_32)length)
|
||||
png_error(png_ptr, "read Error");
|
||||
}
|
||||
#endif
|
||||
#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"). */
|
||||
void PNGAPI
|
||||
png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
|
||||
png_rw_ptr read_data_fn)
|
||||
{
|
||||
png_ptr->io_ptr = io_ptr;
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
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,
|
||||
"It's an error to set both read_data_fn and write_data_fn in the ");
|
||||
png_warning(png_ptr,
|
||||
"same structure. Resetting write_data_fn to NULL.");
|
||||
}
|
||||
|
||||
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
|
||||
png_ptr->output_flush_fn = NULL;
|
||||
#endif
|
||||
}
|
||||
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
|
|
@ -0,0 +1,640 @@
|
|||
|
||||
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2002 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.)
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
/* turn on BGR-to-RGB mapping */
|
||||
void PNGAPI
|
||||
png_set_bgr(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_bgr\n");
|
||||
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_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_swap\n");
|
||||
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_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_packing\n");
|
||||
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_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_packswap\n");
|
||||
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_structp png_ptr, png_color_8p true_bits)
|
||||
{
|
||||
png_debug(1, "in png_set_shift\n");
|
||||
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_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_interlace handling\n");
|
||||
if (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_structp png_ptr, png_uint_32 filler, int filler_loc)
|
||||
{
|
||||
png_debug(1, "in png_set_filler\n");
|
||||
png_ptr->transformations |= PNG_FILLER;
|
||||
png_ptr->filler = (png_byte)filler;
|
||||
if (filler_loc == PNG_FILLER_AFTER)
|
||||
png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
|
||||
else
|
||||
png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
|
||||
|
||||
/* This should probably go in the "do_filler" routine.
|
||||
* I attempted to do that in libpng-1.0.1a but that caused problems
|
||||
* so I restored it in libpng-1.0.2a
|
||||
*/
|
||||
|
||||
if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
|
||||
{
|
||||
png_ptr->usr_channels = 4;
|
||||
}
|
||||
|
||||
/* Also I added this in libpng-1.0.2a (what happens when we expand
|
||||
* a less-than-8-bit grayscale to GA? */
|
||||
|
||||
if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8)
|
||||
{
|
||||
png_ptr->usr_channels = 2;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
|
||||
defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_swap_alpha(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_swap_alpha\n");
|
||||
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_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_invert_alpha\n");
|
||||
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_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_invert_mono\n");
|
||||
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\n");
|
||||
/* This test removed from libpng version 1.0.13 and 1.2.0:
|
||||
* if (row_info->bit_depth == 1 &&
|
||||
*/
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row == NULL || row_info == NULL)
|
||||
return;
|
||||
#endif
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 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_uint_32 i;
|
||||
png_uint_32 istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i+=2)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
rp+=2;
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
|
||||
row_info->bit_depth == 16)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i+=4)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
*(rp+1) = (png_byte)(~(*(rp+1)));
|
||||
rp+=4;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#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\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
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
|
||||
|
||||
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
static 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_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_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\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
row_info->bit_depth < 8)
|
||||
{
|
||||
png_bytep rp, 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 filler or alpha byte(s) */
|
||||
void /* PRIVATE */
|
||||
png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
|
||||
{
|
||||
png_debug(1, "in png_do_strip_filler\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL)
|
||||
#endif
|
||||
{
|
||||
/*
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB ||
|
||||
row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
*/
|
||||
png_bytep sp=row;
|
||||
png_bytep dp=row;
|
||||
png_uint_32 row_width=row_info->width;
|
||||
png_uint_32 i;
|
||||
|
||||
if (row_info->channels == 4)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This converts from RGBX or RGBA to RGB */
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
dp+=3; sp+=4;
|
||||
for (i = 1; i < row_width; i++)
|
||||
{
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
sp++;
|
||||
}
|
||||
}
|
||||
/* This converts from XRGB or ARGB to RGB */
|
||||
else
|
||||
{
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 24;
|
||||
row_info->rowbytes = row_width * 3;
|
||||
}
|
||||
else /* if (row_info->bit_depth == 16) */
|
||||
{
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
/* This converts from RRGGBBXX or RRGGBBAA to RRGGBB */
|
||||
sp += 8; dp += 6;
|
||||
for (i = 1; i < row_width; i++)
|
||||
{
|
||||
/* This could be (although png_memcpy is probably slower):
|
||||
png_memcpy(dp, sp, 6);
|
||||
sp += 8;
|
||||
dp += 6;
|
||||
*/
|
||||
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
sp += 2;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* This converts from XXRRGGBB or AARRGGBB to RRGGBB */
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
/* This could be (although png_memcpy is probably slower):
|
||||
png_memcpy(dp, sp, 6);
|
||||
sp += 8;
|
||||
dp += 6;
|
||||
*/
|
||||
|
||||
sp+=2;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 48;
|
||||
row_info->rowbytes = row_width * 6;
|
||||
}
|
||||
row_info->channels = 3;
|
||||
row_info->color_type &= ~PNG_COLOR_MASK_ALPHA;
|
||||
}
|
||||
/*
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY ||
|
||||
row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
*/
|
||||
else if (row_info->channels == 2)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This converts from GX or GA to G */
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
*dp++ = *sp++;
|
||||
sp++;
|
||||
}
|
||||
}
|
||||
/* This converts from XG or AG to G */
|
||||
else
|
||||
{
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 8;
|
||||
row_info->rowbytes = row_width;
|
||||
}
|
||||
else /* if (row_info->bit_depth == 16) */
|
||||
{
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
/* This converts from GGXX or GGAA to GG */
|
||||
sp += 4; dp += 2;
|
||||
for (i = 1; i < row_width; i++)
|
||||
{
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
sp += 2;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* This converts from XXGG or AAGG to GG */
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
sp += 2;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 16;
|
||||
row_info->rowbytes = row_width * 2;
|
||||
}
|
||||
row_info->channels = 1;
|
||||
row_info->color_type &= ~PNG_COLOR_MASK_ALPHA;
|
||||
}
|
||||
}
|
||||
}
|
||||
#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\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
(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;
|
||||
}
|
||||
}
|
||||
}
|
||||
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 /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
|
||||
|
||||
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
|
||||
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
|
||||
defined(PNG_LEGACY_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_user_transform_info(png_structp png_ptr, png_voidp
|
||||
user_transform_ptr, int user_transform_depth, int user_transform_channels)
|
||||
{
|
||||
png_debug(1, "in png_set_user_transform_info\n");
|
||||
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
|
||||
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;
|
||||
#else
|
||||
if(user_transform_ptr || user_transform_depth || user_transform_channels)
|
||||
png_warning(png_ptr,
|
||||
"This version of libpng does not support user transform info");
|
||||
#endif
|
||||
}
|
||||
#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.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_user_transform_ptr(png_structp png_ptr)
|
||||
{
|
||||
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
|
||||
return ((png_voidp)png_ptr->user_transform_ptr);
|
||||
#else
|
||||
if(png_ptr)
|
||||
return (NULL);
|
||||
return (NULL);
|
||||
#endif
|
||||
}
|
||||
|
|
@ -0,0 +1,228 @@
|
|||
|
||||
/* pngwio.c - functions for data output
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2002 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 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(...).
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.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_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
if (png_ptr->write_data_fn != NULL )
|
||||
(*(png_ptr->write_data_fn))(png_ptr, data, length);
|
||||
else
|
||||
png_error(png_ptr, "Call to NULL write function");
|
||||
}
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
/* 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. */
|
||||
#ifndef USE_FAR_KEYWORD
|
||||
void PNGAPI
|
||||
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_uint_32 check;
|
||||
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
|
||||
#endif
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Write Error");
|
||||
}
|
||||
#else
|
||||
/* this is the model-independent version. Since the standard I/O library
|
||||
can't handle far buffers in the medium and small models, we have to copy
|
||||
the data.
|
||||
*/
|
||||
|
||||
#define NEAR_BUF_SIZE 1024
|
||||
#define MIN(a,b) (a <= b ? a : b)
|
||||
|
||||
void PNGAPI
|
||||
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_uint_32 check;
|
||||
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
|
||||
png_FILE_p io_ptr;
|
||||
|
||||
/* Check if data really is near. If so, use usual code. */
|
||||
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
|
||||
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
|
||||
if ((png_bytep)near_data == data)
|
||||
{
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !WriteFile(io_ptr, near_data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = fwrite(near_data, 1, length, io_ptr);
|
||||
#endif
|
||||
}
|
||||
else
|
||||
{
|
||||
png_byte buf[NEAR_BUF_SIZE];
|
||||
png_size_t written, remaining, err;
|
||||
check = 0;
|
||||
remaining = length;
|
||||
do
|
||||
{
|
||||
written = MIN(NEAR_BUF_SIZE, remaining);
|
||||
png_memcpy(buf, data, written); /* copy far buffer to near buffer */
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !WriteFile(io_ptr, buf, written, &err, NULL) )
|
||||
err = 0;
|
||||
#else
|
||||
err = fwrite(buf, 1, written, io_ptr);
|
||||
#endif
|
||||
if (err != written)
|
||||
break;
|
||||
else
|
||||
check += err;
|
||||
data += written;
|
||||
remaining -= written;
|
||||
}
|
||||
while (remaining != 0);
|
||||
}
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Write Error");
|
||||
}
|
||||
|
||||
#endif
|
||||
#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. */
|
||||
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
|
||||
void /* PRIVATE */
|
||||
png_flush(png_structp png_ptr)
|
||||
{
|
||||
if (png_ptr->output_flush_fn != NULL)
|
||||
(*(png_ptr->output_flush_fn))(png_ptr);
|
||||
}
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
void PNGAPI
|
||||
png_default_flush(png_structp png_ptr)
|
||||
{
|
||||
#if !defined(_WIN32_WCE)
|
||||
png_FILE_p io_ptr;
|
||||
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
|
||||
if (io_ptr != NULL)
|
||||
fflush(io_ptr);
|
||||
#endif
|
||||
}
|
||||
#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.
|
||||
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 ouput, 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. */
|
||||
void PNGAPI
|
||||
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
|
||||
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
|
||||
{
|
||||
png_ptr->io_ptr = io_ptr;
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
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
|
||||
|
||||
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
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,
|
||||
"Attempted to set both read_data_fn and write_data_fn in");
|
||||
png_warning(png_ptr,
|
||||
"the same structure. Resetting read_data_fn to NULL.");
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(USE_FAR_KEYWORD)
|
||||
#if defined(_MSC_VER)
|
||||
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
|
||||
{
|
||||
void *near_ptr;
|
||||
void FAR *far_ptr;
|
||||
FP_OFF(near_ptr) = FP_OFF(ptr);
|
||||
far_ptr = (void FAR *)near_ptr;
|
||||
if(check != 0)
|
||||
if(FP_SEG(ptr) != FP_SEG(far_ptr))
|
||||
png_error(png_ptr,"segment lost in conversion");
|
||||
return(near_ptr);
|
||||
}
|
||||
# else
|
||||
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
|
||||
{
|
||||
void *near_ptr;
|
||||
void FAR *far_ptr;
|
||||
near_ptr = (void FAR *)ptr;
|
||||
far_ptr = (void FAR *)near_ptr;
|
||||
if(check != 0)
|
||||
if(far_ptr != ptr)
|
||||
png_error(png_ptr,"segment lost in conversion");
|
||||
return(near_ptr);
|
||||
}
|
||||
# endif
|
||||
# endif
|
||||
#endif /* PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,563 @@
|
|||
|
||||
/* pngwtran.c - transforms the data in a row for PNG writers
|
||||
*
|
||||
* libpng 1.2.5 - October 3, 2002
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2002 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.)
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
|
||||
/* Transform the data according to the user's wishes. The order of
|
||||
* transformations is significant.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_write_transformations(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_do_write_transformations\n");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
#if defined(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 */
|
||||
&(png_ptr->row_info), /* row_info: */
|
||||
/* png_uint_32 width; width of row */
|
||||
/* png_uint_32 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
|
||||
#if defined(PNG_WRITE_FILLER_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_FILLER)
|
||||
png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
|
||||
png_ptr->flags);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_PACKSWAP)
|
||||
png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_PACK)
|
||||
png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
|
||||
(png_uint_32)png_ptr->bit_depth);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_SWAP_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_SWAP_BYTES)
|
||||
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_SHIFT_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_SHIFT)
|
||||
png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
|
||||
&(png_ptr->shift));
|
||||
#endif
|
||||
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_INVERT_ALPHA)
|
||||
png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_SWAP_ALPHA)
|
||||
png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_BGR)
|
||||
png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_INVERT_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_INVERT_MONO)
|
||||
png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
}
|
||||
|
||||
#if defined(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\n");
|
||||
if (row_info->bit_depth == 8 &&
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
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;
|
||||
}
|
||||
}
|
||||
row_info->bit_depth = (png_byte)bit_depth;
|
||||
row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
|
||||
row_info->rowbytes =
|
||||
((row_info->width * row_info->pixel_depth + 7) >> 3);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(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_color_8p bit_depth)
|
||||
{
|
||||
png_debug(1, "in png_do_shift\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL &&
|
||||
#else
|
||||
if (
|
||||
#endif
|
||||
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_uint_32 i;
|
||||
png_byte mask;
|
||||
png_uint_32 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++)
|
||||
{
|
||||
png_uint_16 v;
|
||||
int j;
|
||||
|
||||
v = *bp;
|
||||
*bp = 0;
|
||||
for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0])
|
||||
{
|
||||
if (j > 0)
|
||||
*bp |= (png_byte)((v << j) & 0xff);
|
||||
else
|
||||
*bp |= (png_byte)((v >> (-j)) & mask);
|
||||
}
|
||||
}
|
||||
}
|
||||
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++)
|
||||
{
|
||||
|
||||
png_uint_16 v;
|
||||
int j;
|
||||
int c = (int)(i%channels);
|
||||
|
||||
v = *bp;
|
||||
*bp = 0;
|
||||
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
|
||||
{
|
||||
if (j > 0)
|
||||
*bp |= (png_byte)((v << j) & 0xff);
|
||||
else
|
||||
*bp |= (png_byte)((v >> (-j)) & 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++)
|
||||
{
|
||||
int c = (int)(i%channels);
|
||||
png_uint_16 value, v;
|
||||
int j;
|
||||
|
||||
v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1));
|
||||
value = 0;
|
||||
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
|
||||
{
|
||||
if (j > 0)
|
||||
value |= (png_uint_16)((v << j) & (png_uint_16)0xffff);
|
||||
else
|
||||
value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff);
|
||||
}
|
||||
*bp++ = (png_byte)(value >> 8);
|
||||
*bp++ = (png_byte)(value & 0xff);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(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\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL)
|
||||
#endif
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
/* This converts from ARGB to RGBA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
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;
|
||||
}
|
||||
}
|
||||
/* This converts from AARRGGBB to RRGGBBAA */
|
||||
else
|
||||
{
|
||||
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];
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
{
|
||||
/* This converts from AG to GA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
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;
|
||||
}
|
||||
}
|
||||
/* This converts from AAGG to GGAA */
|
||||
else
|
||||
{
|
||||
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
|
||||
|
||||
#if defined(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\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL)
|
||||
#endif
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
/* This inverts the alpha channel in RGBA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
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++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
/* This inverts the alpha channel in RRGGBBAA */
|
||||
else
|
||||
{
|
||||
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++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
{
|
||||
/* This inverts the alpha channel in GA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
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++));
|
||||
}
|
||||
}
|
||||
/* This inverts the alpha channel in GGAA */
|
||||
else
|
||||
{
|
||||
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++) = *(sp++);
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(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\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
(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);
|
||||
}
|
||||
}
|
||||
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=(s0-s1)&0xffff;
|
||||
png_uint_32 blue=(s2-s1)&0xffff;
|
||||
*(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_MNG_FEATURES_SUPPORTED */
|
||||
#endif /* PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue