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Update bundled zlib to v1.2.3.

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Update bundled libpng to v1.2.16.



git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5666 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Michael R Sweet
2007-02-06 22:02:28 +00:00
parent 58cfbc6c82
commit dc24949ad5
46 changed files with 2929 additions and 2251 deletions
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2
CHANGES
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@@ -2,6 +2,8 @@ CHANGES IN FLTK 1.1.8
- Documentation fixes (STR #1454, STR #1455, STR #1456,
STR #1457, STR #1458, STR #1460, STR #1481, STR #1578)
- Updated the bundled zlib to v1.2.3.
- Updated the bundled libpng to v1.2.16.
- "make install" now uses the install command (or the
included install-sh script) to copy files to the
install directories, to ensure that permissions are

62
png/ANNOUNCE
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@@ -1,28 +1,50 @@
Libpng 1.2.7 - September 12, 2004
Libpng 1.2.16 - January 31, 2007
This is a public release of libpng, intended for use in production codes.
Changes since the last public release (1.2.6):
Files available for download:
Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
Removed unused pngasmrd.h file.
Removed references to uu.net for archived files. Added references to
PNG Spec (second edition) and the PNG ISO/IEC Standard.
Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.
Fixed bug with "optimized window size" in the IDAT datastream, that
causes libpng to write PNG files with incorrect zlib header bytes.
Fixed bug with sCAL chunk and big-endian machines (David Munro).
Undid new code added in 1.2.6 to update the color_type in
png_set_filler().
Added png_set_add_alpha() that updates color type.
Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
Added makefile.hp64
Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
Source files with LF line endings (for Unix/Linux) and with a
"configure" script
Send comments/corrections/commendations to
png-implement@ccrc.wustl.edu (subscription required; write to
majordomo@ccrc.wustl.edu with "subscribe png-implement" in the message)
or to glennrp@users.sourceforge.net
libpng-1.2.16.tar.gz
libpng-1.2.16.tar.bz2
Source files with LF line endings (for Unix/Linux) without the
"configure" script
libpng-1.2.16-no-config.tar.gz
libpng-1.2.16-no-config.tar.bz2
Source files with CRLF line endings (for Windows), without the
"configure" script
lpng1216.zip
lpng1216.tar.bz2
Project files
libpng-1.2.16-project-netware.zip
libpng-1.2.16-project-wince.zip
Other information:
libpng-1.2.16-README.txt
libpng-1.2.16-KNOWNBUGS.txt
libpng-1.2.16-LICENSE.txt
libpng-1.2.16-Y2K-compliance.txt
Changes since the last public release (1.2.15):
version 1.2.16 [January 31, 2007]
Fix bugs in makefile.nommx
Revised scripts/CMakeLists.txt
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe) or to glennrp at users.sourceforge.net
Glenn R-P

349
png/CHANGES
View File

@@ -10,7 +10,7 @@ version 0.3
split up pngwrite.c to several files
added pnglib.txt
added example.c
cleaned up writer, adding a few new tranformations
cleaned up writer, adding a few new transformations
fixed some bugs in writer
interfaced with zlib 0.5
added K&R support
@@ -22,7 +22,7 @@ version 0.4
created png_color_16 and png_color_8 to handle color needs
cleaned up color type defines
fixed various bugs
made various names more consistant
made various names more consistent
interfaced with zlib 0.71
cleaned up zTXt reader and writer (using zlib's Reset functions)
split transformations into pngrtran.c and pngwtran.c
@@ -151,7 +151,7 @@ version 0.95 [March, 1997]
added "packswap" transformation, which changes the endianness of
packed-pixel bytes (Kevin Bracey)
added "strip_alpha" transformation, which removes the alpha channel of
input images without using it (not neccesarily a good idea)
input images without using it (not necessarily a good idea)
added "swap_alpha" transformation, which puts the alpha channel in front
of the color bytes instead of after
removed all implicit variable tests which assume NULL == 0 (I think)
@@ -172,7 +172,7 @@ version 0.95 [March, 1997]
more chunk types tested in pngtest.c
renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
png_set_<chunk>. We now have corresponding png_get_<chunk>
functions in pngget.c to get infomation in info_ptr. This isolates
functions in pngget.c to get information in info_ptr. This isolates
the application from the internal organization of png_info_struct
(good for shared library implementations).
@@ -522,9 +522,9 @@ version 1.0.5b [November 23, 1999]
Updated scripts/makevms.com and added makevms.com to contrib/gregbook
and contrib/pngminus (Martin Zinser)
version 1.0.5c [November 26, 1999]
Moved png_get_header_version from png.h to png.c, to accomodate ansi2knr.
Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.
Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
accomodate making DLL's: Moved usr_png_ver from global variable to function
accommodate making DLL's: Moved usr_png_ver from global variable to function
png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and
eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays
into pngtypes.h. Eliminated use of global png_pass arrays. Declared the
@@ -1345,7 +1345,7 @@ version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED
section of png.h where they were inadvertently placed in version rc3.
version 1.0.16 and 1.2.6 [August 15, 2004]
version 1.2.6 and 1.0.16 [August 15, 2004]
Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
version 1.2.7beta1 [August 26, 2004]
Removed unused pngasmrd.h file.
@@ -1361,13 +1361,338 @@ version 1.2.7beta2 [August 28, 2004]
Added png_set_add_alpha() that updates color type.
version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
version 1.0.17 and 1.2.7 [September 12, 2004]
version 1.2.7 and 1.0.17 [September 12, 2004]
Added makefile.hp64
Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
version 1.2.8beta1 [November 1, 2004]
Fixed bug in png_text_compress() that would fail to complete a large block.
Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
strip alpha operation in png_do_strip_filler().
Added PNG_1_2_X definition in pngconf.h
#ifdef out png_info_init in png.c and png_read_init in pngread.c (as of 1.3.0)
version 1.2.8beta2 [November 2, 2004]
Reduce color_type to a nonalpha type after strip alpha operation in
png_do_strip_filler().
version 1.2.8beta3 [November 3, 2004]
Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
version 1.2.8beta4 [November 12, 2004]
Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
of data type in deflate (Cosmin).
Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
version 1.2.8beta5 [November 20, 2004]
Use png_ptr->flags instead of png_ptr->transformations to pass
PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
compatibility.
Revised handling of SPECIALBUILD, PRIVATEBUILD,
PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
version 1.2.8rc1 [November 24, 2004]
Moved handling of BUILD macros from pngconf.h to png.h
Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently
omitted from beta5.
Revised scripts/pngw32.rc
Despammed mailing addresses by masking "@" with "at".
Inadvertently installed a supposedly faster test version of pngrutil.c
version 1.2.8rc2 [November 26, 2004]
Added two missing "\" in png.h
Change tests in pngread.c and pngpread.c to
if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
png_do_read_transformations(png_ptr);
version 1.2.8rc3 [November 28, 2004]
Reverted pngrutil.c to version libpng-1.2.8beta5.
Added scripts/makefile.elf with supporting code in pngconf.h for symbol
versioning (John Bowler).
version 1.2.8rc4 [November 29, 2004]
Added projects/visualc7 (Simon-pierre).
version 1.2.8rc5 [November 29, 2004]
Fixed new typo in scripts/pngw32.rc
Send comments/corrections/commendations to
png-implement@ccrc.wustl.edu (subscription required; write to
majordomo@ccrc.wustl.edu with "subscribe png-implement" in the message)
or to glennrp@users.sourceforge.net
version 1.2.8 [December 3, 2004]
Removed projects/visualc7, added projects/visualc71.
version 1.2.9beta1 [February 21, 2006]
Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
Revised man page and libpng.txt to make it clear that one should not call
png_read_end or png_write_end after png_read_png or png_write_png.
Updated references to png-mng-implement mailing list.
Fixed an incorrect typecast in pngrutil.c
Added PNG_NO_READ_SUPPORTED conditional for making a write-only library.
Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional.
Optimized alpha-inversion loops in pngwtran.c
Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c
Make sure num_trans is <= 256 before copying data in png_set_tRNS().
Make sure num_palette is <= 256 before copying data in png_set_PLTE().
Interchanged order of write_swap_alpha and write_invert_alpha transforms.
Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin).
Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin).
Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin).
Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16,
png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin).
Added type cast (png_byte) in png_write_sCAL() (Cosmin).
Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).
Default iTXt support was inadvertently enabled.
version 1.2.9beta2 [February 21, 2006]
Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
checking for png_read_dither in pngrtran.c
Revised checking of chromaticity limits to accommodate extended RGB
colorspace (John Denker).
Changed line endings in some of the project files to CRLF, even in the
"Unix" tar distributions (Cosmin).
Made png_get_int_32 and png_save_int_32 always available (Cosmin).
Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def
with the newly exported functions.
Eliminated distributions without the "configure" script.
Updated INSTALL instructions.
version 1.2.9beta3 [February 24, 2006]
Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
Removed reference to pngasmrd.h from Makefile.am
Renamed CHANGES to ChangeLog.
Renamed LICENSE to COPYING.
Renamed ANNOUNCE to NEWS.
Created AUTHORS file.
version 1.2.9beta4 [March 3, 2006]
Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
Removed newline from the end of some error and warning messages.
Removed test for sqrt() from configure.ac and configure.
Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix).
Disabled default iTXt support that was inadvertently enabled in
libpng-1.2.9beta1.
Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
Removed libpng version and date from *.c files.
version 1.2.9beta5 [March 4, 2006]
Removed trailing blanks from source files.
Put version and date of latest change in each source file, and changed
copyright year accordingly.
More cleanup of configure.ac, Makefile.ac, and associated scripts.
Restored scripts/makefile.elf which was inadvertently deleted.
version 1.2.9beta6 [March 6, 2006]
Fixed typo (16) in configuration files.
version 1.2.9beta7 [March 7, 2006]
Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
in png.h.
Updated makefile.elf as suggested by debian.
Made cosmetic changes to some makefiles, adding LN_SF and other macros.
Made some makefiles accept "exec_prefix".
version 1.2.9beta8 [March 9, 2006]
Fixed some "#if defined (..." which should be "#if defined(..."
Bug introduced in libpng-1.2.8.
Fixed inconsistency in definition of png_default_read_data()
Restored blank that was lost from makefile.sggcc "clean" target in beta7.
Revised calculation of "current" and "major" for irix in ltmain.sh
Changed "mkdir" to "MKDIR_P" in some makefiles.
Separated PNG_EXPAND and PNG_EXPAND_tRNS.
Added png_set_expand_gray_1_2_4_to_8() and deprecated
png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
version 1.2.9beta9 [March 10, 2006]
Include "config.h" in pngconf.h when available.
Added some checks for NULL png_ptr or NULL info_ptr (timeless)
version 1.2.9beta10 [March 20, 2006]
Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
Made pnggccrd.c PIC-compliant (Christian Aichinger).
Added makefile.mingw (Wolfgang Glas).
Revised pngconf.h MMX checking.
version 1.2.9beta11 [March 22, 2006]
Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
version 1.2.9rc1 [March 31, 2006]
Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
Removed nonsensical assertion check from pngtest.c (Cosmin).
version 1.2.9 [April 14, 2006]
Revised makefile.beos and added "none" selector in ltmain.sh
version 1.2.10beta1 [April 15, 2006]
Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
-DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
version 1.2.10beta2 [April 15, 2006]
Manually updated Makefile.in and configure. Changed png_conf.h.in
back to config.h.
version 1.2.10beta3 [April 15, 2006]
Change png_conf.h back to config.h in pngconf.h.
version 1.2.10beta4 [April 16, 2006]
Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
version 1.2.10beta5 [April 16, 2006]
Added a configure check for compiling assembler code in pnggccrd.c
version 1.2.10beta6 [April 17, 2006]
Revised the configure check for pnggccrd.c
Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
version 1.2.10beta7 [April 18, 2006]
Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
version 1.2.10rc1 [April 19, 2006]
Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
version 1.2.10rc2 [April 20, 2006]
Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
in configure.ac and configure
Made the configure warning about versioned symbols less arrogant.
version 1.2.10rc3 [April 21, 2006]
Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
writing an embedded PNG without the 8-byte signature.
Revised makefiles and configure to avoid making links to libpng.so.*
version 1.2.10 [April 23, 2006]
Reverted configure to "rc2" state.
version 1.2.11beta1 [May 31, 2006]
scripts/libpng.pc.in contained "configure" style version info and would
not work with makefiles.
The shared-library makefiles were linking to libpng.so.0 instead of
libpng.so.3 compatibility as the library.
version 1.2.11beta2 [June 2, 2006]
Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
buffer overflow.
Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)
version 1.2.11beta3 [June 5, 2006]
Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).
Removed the accidental leftover Makefile.in~ (Cosmin).
Avoided potential buffer overflow and optimized buffer in
png_write_sCAL(), png_write_sCAL_s() (Cosmin).
Removed the include directories and libraries from CFLAGS and LDFLAGS
in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).
version 1.2.11beta4 [June 6, 2006]
Allow zero-length IDAT chunks after the entire zlib datastream, but not
after another intervening chunk type.
version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
Deleted extraneous square brackets from [config.h] in configure.ac
version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
Added prototypes for PNG_INCH_CONVERSIONS functions to png.h
Revised INSTALL and autogen.sh
Fixed typo in several makefiles (-W1 should be -Wl)
Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
Removed the new typedefs for 64-bit systems (delay until version 1.4.0)
Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid
reading out of bounds.
version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
Really removed the new typedefs for 64-bit systems.
version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
Removed png_sig_bytes entry from scripts/pngw32.def
version 1.0.19, 1.2.11 [June 26, 2006]
None.
version 1.0.20, 1.2.12 [June 27, 2006]
Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
buffer overflow.
version 1.2.13beta1 [October 2, 2006]
Removed AC_FUNC_MALLOC from configure.ac
Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
Change "logical" to "bitwise" throughout documentation.
Detect and fix attempt to write wrong iCCP profile length.
version 1.0.21, 1.2.13 [November 14, 2006]
Fix potential buffer overflow in sPLT chunk handler.
Fix Makefile.am to not try to link to noexistent files.
Check all exported functions for NULL png_ptr.
version 1.2.14beta1 [November 17, 2006]
Relocated three misplaced tests for NULL png_ptr.
Built Makefile.in with automake-1.9.6 instead of 1.9.2.
Build configure with autoconf-2.60 instead of 2.59
version 1.2.14beta2 [November 17, 2006]
Added some typecasts in png_zalloc().
version 1.2.14rc1 [November 20, 2006]
Changed "strtod" to "png_strtod" in pngrutil.c
version 1.0.22, 1.2.14 [November 27, 2006]
Added missing "$(srcdir)" in Makefile.am and Makefile.in
version 1.2.15beta1 [December 3, 2006]
Generated configure with autoconf-2.61 instead of 2.60
Revised configure.ac to update libpng.pc and libpng-config.
version 1.2.15beta2 [December 3, 2006]
Always export MMX asm functions, just stubs if not building pnggccrd.c
version 1.2.15beta3 [December 4, 2006]
Add "png_bytep" typecast to profile while calculating length in pngwutil.c
version 1.2.15beta4 [December 7, 2006]
Added scripts/CMakeLists.txt
Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
version 1.2.15beta5 [December 7, 2006]
Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
Revised scripts/CMakeLists.txt
version 1.2.15beta6 [December 13, 2006]
Revised scripts/CMakeLists.txt and configure.ac
version 1.2.15rc1 [December 18, 2006]
Revised scripts/CMakeLists.txt
version 1.2.15rc2 [December 21, 2006]
Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
Added scripts/makefile.nommx
version 1.2.15rc3 [December 25, 2006]
Fixed shared library numbering error that was intruduced in 1.2.15beta6.
version 1.2.15rc4 [December 27, 2006]
Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
version 1.2.15rc5 [December 31, 2006]
Revised handling of rgb_to_gray.
version 1.2.15 [January 5, 2007]
Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
version 1.2.16beta1 [January 6, 2007]
Fix bugs in makefile.nommx
version 1.2.16beta2 [January 16, 2007]
Revised scripts/CMakeLists.txt
version 1.2.16 [January 31, 2007]
No changes.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe)
or to glennrp at users.sourceforge.net
Glenn R-P

93
png/INSTALL
View File

@@ -1,16 +1,50 @@
Installing libpng version 1.2.7 - September 12, 2004
Installing libpng version 1.2.16 - January 31, 2007
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.
On Unix/Linux and similar systems, you can simply type
./configure [--prefix=/path]
make check
make install
and ignore the rest of this document.
If configure does not work on your system and you have a reasonably
up-to-date set of tools, running ./autogen.sh before running ./configure
may fix the problem. You can also run the individual commands in
autogen.sh with the --force option, if supported by your version of
the tools. If you run 'libtoolize --force', though, this will replace
the distributed, patched, version of ltmain.sh with an unpatched version
and your shared library builds may fail to produce libraries with the
correct version numbers.
Instead, you can use one of the custom-built makefiles in the
"scripts" directory
cp scripts/makefile.system makefile
make test
make install
Or you can use one of the "projects" in the "projects" directory.
If you want to use "cmake" (see www.cmake.org), copy CMakeLists.txt
from the "scripts" directory to this directory and type
cmake . [-DPNG_MMX=YES] -DCMAKE_INSTALL_PREFIX=/path
make
make install
Before installing libpng, you must first install zlib, if it
is not already on your system. zlib can usually be found
wherever you got libpng. zlib can be placed in another directory,
at the same level as libpng.
If your system already has a preinstalled zlib 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-1.2.7" or "lpng109" and "zlib-1.2.1"
might be called "libpng-1.2.16" or "lpng109" and "zlib-1.2.1"
or "zlib121") so that you have directories called "zlib" and "libpng".
Your directory structure should look like this:
@@ -47,7 +81,6 @@ 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 projects\visualc6 directory and follow the instructions in
projects\visualc6\README.txt.
@@ -59,18 +92,24 @@ build libpng for Netware or Beos as instructed in projects\netware.txt
or projects\beos.
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.
then come back here and run "configure" or choose the appropriate
makefile.sys in the scripts directory.
The files that are presently available in the scripts directory
include
CMakeLists.txt => "cmake" script
makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
makefile.elf => Linux/ELF makefile symbol versioning,
gcc, creates libpng12.so.0.1.2.16)
makefile.linux => Linux/ELF makefile
(gcc, creates libpng12.so.0.1.2.7)
(gcc, creates libpng12.so.0.1.2.16)
makefile.gcmmx => Linux/ELF makefile
(gcc, creates libpng12.so.0.1.2.7,
(gcc, creates libpng12.so.0.1.2.16,
uses assembler code tuned for Intel MMX platform)
makefile.nommx => Linux/ELF makefile
(gcc, creates libpng12.so.0.1.2.16
does not use Intel MMX assembler code)
makefile.gcc => Generic makefile (gcc, creates static libpng.a)
makefile.knr => Archaic UNIX Makefile that converts files with
ansi2knr (Requires ansi2knr.c from
@@ -92,12 +131,12 @@ include
makefile.openbsd => OpenBSD makefile
makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
makefile.sggcc => Silicon Graphics (gcc,
creates libpng12.so.0.1.2.7)
creates libpng12.so.0.1.2.16)
makefile.sunos => Sun makefile
makefile.solaris => Solaris 2.X makefile (gcc,
creates libpng12.so.0.1.2.7)
creates libpng12.so.0.1.2.16)
makefile.so9 => Solaris 9 makefile (gcc,
creates libpng12.so.0.1.2.7)
creates libpng12.so.0.1.2.16)
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
@@ -165,3 +204,23 @@ instead, as demonstrated in contrib/visupng of the libpng distribution.
Further information can be found in the README and libpng.txt
files, in the individual makefiles, in png.h, and the manual pages
libpng.3 and png.5.
Using the ./configure script -- 16 December 2002.
=================================================
The ./configure script should work compatibly with what scripts/makefile.*
did, however there are some options you need to add to configure explicitly,
which previously was done semi-automatically (if you didn't edit
scripts/makefile.* yourself, that is)
CFLAGS="-Wall -O3 -funroll-loops \
-malign-loops=2 -malign-functions=2" ./configure --prefix=/usr/include \
--with-pkgconfigdir=/usr/lib/pkgconfig --includedir=/usr/include
You can alternatively specify --includedir=/usr/include, /usr/local/include,
/usr/include/png12, or whatever.

14
png/KNOWNBUG
View File

@@ -1,5 +1,5 @@
Known bugs in libpng version 1.2.7
Known bugs in libpng version 1.2.16
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
@@ -9,3 +9,15 @@ Known bugs in libpng version 1.2.7
fixed a problem under FreeBSD but not the problem with NetBSD, which
still fails as of libpng-1.2.2rc1.
2. February 23, 2006: The custom makefiles don't build libpng with -lz.
STATUS: This is a subject of debate. The change will probably be made
as a part of a major overhaul of the makefiles in libpng version 1.3.0.
3. February 24, 2006: The Makefile generated by the "configure" script
fails to install symbolic links
libpng12.so => libpng12.so.0.1.2.9betaN
that are generated by the custom makefiles.
STATUS: For now, system library builders should use the custom makefiles.

8
png/LICENSE
View File

@@ -8,8 +8,8 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
If you modify libpng you may insert additional notices immediately following
this sentence.
libpng version 1.2.6, September 12, 2004, is
Copyright (c) 2004 Glenn Randers-Pehrson, and is
libpng versions 1.2.6, August 15, 2004, through 1.2.16, January 31, 2007, are
Copyright (c) 2004, 2006 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
@@ -105,5 +105,5 @@ Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp@users.sourceforge.net
September 12, 2004
glennrp at users.sourceforge.net
January 31, 2007

31
png/README
View File

@@ -1,4 +1,4 @@
README for libpng version 1.2.7 - September 12, 2004 (shared library 12.0)
README for libpng version 1.2.16 - January 31, 2007 (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.
@@ -103,17 +103,18 @@ 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.
glennrp@users.sourceforge.net
png-implement@ccrc.wustl.edu (subscription required; write to
majordomo@ccrc.wustl.edu with "subscribe png-implement" in the message).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe) or to glennrp at users.sourceforge.net
You can't reach Guy, the original libpng author, at the addresses
given in previous versions of this document. He and Andreas will read mail
addressed to the png-implement list, however.
Please do not send general questions about PNG. Send them to
the (png-list@ccrc.wustl.edu, subscription required, write to
majordomo@ccrc.wustl.edu with "subscribe png-list" in your message).
the (png-list at ccrc.wustl.edu, subscription required, write to
majordomo at ccrc.wustl.edu with "subscribe png-list" in your message).
On the other hand,
please do not send libpng questions to that address, send them to me
or to the png-implement list. I'll
@@ -188,10 +189,12 @@ Files in this distribution:
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.elf => Linux/ELF makefile symbol versioning,
gcc, creates libpng12.so.0.1.2.16)
makefile.linux => Linux/ELF makefile
(gcc, creates libpng12.so.0.1.2.7)
(gcc, creates libpng12.so.0.1.2.16)
makefile.gcmmx => Linux/ELF makefile
(gcc, creates libpng12.so.0.1.2.7,
(gcc, creates libpng12.so.0.1.2.16,
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
@@ -213,12 +216,12 @@ Files in this distribution:
makefile.openbsd => OpenBSD makefile
makefile.sgi => Silicon Graphics IRIX (cc, creates static lib)
makefile.sggcc => Silicon Graphics
(gcc, creates libpng12.so.0.1.2.7)
(gcc, creates libpng12.so.0.1.2.16)
makefile.sunos => Sun makefile
makefile.solaris => Solaris 2.X makefile
(gcc, creates libpng12.so.0.1.2.7)
(gcc, creates libpng12.so.0.1.2.16)
makefile.so9 => Solaris 9 makefile
(gcc, creates libpng12.so.0.1.2.7)
(gcc, creates libpng12.so.0.1.2.16)
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
@@ -249,12 +252,12 @@ Files in this distribution:
Good luck, and happy coding.
-Glenn Randers-Pehrson (current maintainer)
Internet: glennrp@users.sourceforge.net
Internet: glennrp at users.sourceforge.net
-Andreas Eric Dilger (former maintainer, 1996-1997)
Internet: adilger@enel.ucalgary.ca
Internet: adilger at enel.ucalgary.ca
Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
-Guy Eric Schalnat (original author and former maintainer, 1995-1996)
(formerly of Group 42, Inc)
Internet: gschal@infinet.com
Internet: gschal at infinet.com

4
png/Y2KINFO
View File

@@ -1,13 +1,13 @@
Y2K compliance in libpng:
=========================
September 12, 2004
January 31, 2007
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 1.2.7 are Y2K compliant. It is my belief that earlier
upward through 1.2.16 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

522
png/libpng.3
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File diff suppressed because it is too large Load Diff

60
png/libpng.txt
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@@ -1,9 +1,9 @@
libpng.txt - A description on how to use and modify libpng
libpng version 1.2.7 - September 12, 2004
libpng version 1.2.16 - January 31, 2007
Updated and distributed by Glenn Randers-Pehrson
<glennrp@users.sourceforge.net>
Copyright (c) 1998-2004 Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2005 Glenn Randers-Pehrson
For conditions of distribution and use, see copyright
notice in png.h.
@@ -392,7 +392,7 @@ dithering, and setting filler.) If this is the case, simply do this:
png_read_png(png_ptr, info_ptr, png_transforms, NULL)
where png_transforms is an integer containing the logical OR of
where png_transforms is an integer containing the bitwise OR of
some set of transformation flags. This call is equivalent to png_read_info(),
followed the set of transformations indicated by the transform mask,
then png_read_image(), and finally png_read_end().
@@ -771,9 +771,10 @@ in RGB RGB RGB format unless png_set_filler() or png_set_add_alpha()
is called to insert filler bytes, either before or after each RGB triplet.
16-bit RGB data will be returned RRGGBB RRGGBB, with the most significant
byte of the color value first, unless png_set_strip_16() is called to
transform it to regular RGB RGB triplets, or png_set_filler|add alpha()
is called to insert filler bytes, either before or after each RRGGBB
triplet. Similarly, 8-bit or 16-bit grayscale data can be modified with
transform it to regular RGB RGB triplets, or png_set_filler() or
png_set_add alpha() is called to insert filler bytes, either before or
after each RRGGBB triplet. Similarly, 8-bit or 16-bit grayscale data can
be modified with
png_set_filler(), png_set_add_alpha(), or png_set_strip_16().
The following code transforms grayscale images of less than 8 to 8 bits,
@@ -786,7 +787,7 @@ viewing application that wishes to treat all images in the same way.
png_set_palette_to_rgb(png_ptr);
if (color_type == PNG_COLOR_TYPE_GRAY &&
bit_depth < 8) png_set_gray_1_2_4_to_8(png_ptr);
bit_depth < 8) png_set_expand_gray_1_2_4_to_8(png_ptr);
if (png_get_valid(png_ptr, info_ptr,
PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png_ptr);
@@ -796,6 +797,11 @@ in libpng version 1.0.4, with the function names expanded to improve code
readability. In some future version they may actually do different
things.
As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
added. It expands the sample depth without changing tRNS to alpha.
At the same time, png_set_gray_1_2_4_to_8() was deprecated, and it
will be removed from a future version.
PNG can have files with 16 bits per channel. If you only can handle
8 bits per channel, this will strip the pixels down to 8 bit.
@@ -867,7 +873,7 @@ to do that, you can add a true alpha channel with
png_set_add_alpha(png_ptr, filler, PNG_FILLER_AFTER);
where "filler" contains the alpha value to assign to each pixel.
This function became available in libpng-1.2.7.
This function was added in libpng-1.2.7.
If you are reading an image with an alpha channel, and you need the
data as ARGB instead of the normal PNG format RGBA:
@@ -922,7 +928,7 @@ the normalized graylevel is computed:
The default values approximate those recommended in the Charles
Poynton's Color FAQ, <http://www.inforamp.net/~poynton/>
Copyright (c) 1998-01-04 Charles Poynton poynton@inforamp.net
Copyright (c) 1998-01-04 Charles Poynton <poynton at inforamp.net>
Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
@@ -1247,8 +1253,8 @@ the second parameter NULL.
Finishing a sequential read
After you are finished reading the image through either the high- or
low-level interfaces, you can finish reading the file. If you are
After you are finished reading the image through the
low-level interface, you can finish reading the file. If you are
interested in comments or time, which may be stored either before or
after the image data, you should pass the separate png_info struct if
you want to keep the comments from before and after the image
@@ -1266,7 +1272,7 @@ point to libpng-allocated storage with the following function:
png_free_data(png_ptr, info_ptr, mask, seq)
mask - identifies data to be freed, a mask
containing the logical OR of one or
containing the bitwise OR of one or
more of
PNG_FREE_PLTE, PNG_FREE_TRNS,
PNG_FREE_HIST, PNG_FREE_ICCP,
@@ -1328,7 +1334,7 @@ application instead of by libpng, you can use
png_set_invalid(png_ptr, info_ptr, mask);
mask - identifies the chunks to be made invalid,
containing the logical OR of one or
containing the bitwise OR of one or
more of
PNG_INFO_gAMA, PNG_INFO_sBIT,
PNG_INFO_cHRM, PNG_INFO_PLTE,
@@ -1595,6 +1601,14 @@ Libpng section below.
png_init_io(png_ptr, fp);
If you are embedding your PNG into a datastream such as MNG, and don't
want libpng to write the 8-byte signature, or if you have already
written the signature in your application, use
png_set_sig_bytes(png_ptr, 8);
to inform libpng that it should not write a signature.
Write callbacks
At this point, you can set up a callback function that will be
@@ -1632,7 +1646,7 @@ types.
/* turn on or off filtering, and/or choose
specific filters. You can use either a single
PNG_FILTER_VALUE_NAME or the logical OR of one
PNG_FILTER_VALUE_NAME or the bitwise OR of one
or more PNG_FILTER_NAME masks. */
png_set_filter(png_ptr, 0,
PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE |
@@ -2005,7 +2019,7 @@ png_set_rows() to put image data in the info structure), simply do this:
png_write_png(png_ptr, info_ptr, png_transforms, NULL)
where png_transforms is an integer containing the logical OR of some set of
where png_transforms is an integer containing the bitwise OR of some set of
transformation flags. This call is equivalent to png_write_info(),
followed the set of transformations indicated by the transform mask,
then png_write_image(), and finally png_write_end().
@@ -2265,7 +2279,7 @@ point to libpng-allocated storage with the following function:
png_free_data(png_ptr, info_ptr, mask, seq)
mask - identifies data to be freed, a mask
containing the logical OR of one or
containing the bitwise OR of one or
more of
PNG_FREE_PLTE, PNG_FREE_TRNS,
PNG_FREE_HIST, PNG_FREE_ICCP,
@@ -2458,7 +2472,7 @@ Custom chunks
If you need to read or write custom chunks, you may need to get deeper
into the libpng code. The library now has mechanisms for storing
and writing chunks of unknown type; you can even declare callbacks
for custom chunks. Hoewver, this may not be good enough if the
for custom chunks. However, this may not be good enough if the
library code itself needs to know about interactions between your
chunk and existing `intrinsic' chunks.
@@ -2809,7 +2823,7 @@ defined:
#if defined(PNG_USE_PNGGCCRD) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) \
&& defined(PNG_THREAD_UNSAFE_OK)
/* Disable thread-unsafe features of pnggccrd */
if (png_access_version() >= 10200)
if (png_access_version_number() >= 10200)
{
png_uint_32 mmx_disable_mask = 0;
png_uint_32 asm_flags;
@@ -2835,12 +2849,12 @@ Libpng can support some of these extensions. To enable them, use the
png_permit_mng_features() function:
feature_set = png_permit_mng_features(png_ptr, mask)
mask is a png_uint_32 containing the logical OR of the
mask is a png_uint_32 containing the bitwise OR of the
features you want to enable. These include
PNG_FLAG_MNG_EMPTY_PLTE
PNG_FLAG_MNG_FILTER_64
PNG_ALL_MNG_FEATURES
feature_set is a png_uint_32 that is the logical AND of
feature_set is a png_uint_32 that is the bitwise AND of
your mask with the set of MNG features that is
supported by the version of libpng that you are using.
@@ -2903,13 +2917,13 @@ application:
IX. Y2K Compliance in libpng
September 12, 2004
January 31, 2007
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 1.2.7 are Y2K compliant. It is my belief that earlier
upward through 1.2.16 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

1082
png/libpngpf.3
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File diff suppressed because it is too large Load Diff

4
png/png.5
View File

@@ -1,4 +1,4 @@
.TH PNG 5 "September 12, 2004"
.TH PNG 5 "January 31, 2007"
.SH NAME
png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION
@@ -58,7 +58,7 @@ Thomas Boutell and others (png-list).
.SH COPYRIGHT NOTICE
.LP
This man page is Copyright (c) 1998-2004 Glenn Randers-Pehrson. See png.h
This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h
for conditions of use and distribution.
.LP
The PNG Specification (Second Edition) is

62
png/png.c
View File

@@ -1,9 +1,9 @@
/* png.c - location for general purpose libpng functions
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*/
@@ -13,7 +13,7 @@
#include "png.h"
/* Generate a compiler error if there is an old png.h in the search path. */
typedef version_1_2_7 Your_png_h_is_not_version_1_2_7;
typedef version_1_2_16 Your_png_h_is_not_version_1_2_16;
/* Version information for C files. This had better match the version
* string defined in png.h. */
@@ -22,9 +22,12 @@ typedef version_1_2_7 Your_png_h_is_not_version_1_2_7;
/* png_libpng_ver was changed to a function in version 1.0.5c */
const char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING;
#ifdef PNG_READ_SUPPORTED
/* png_sig was changed to a function in version 1.0.5c */
/* Place to hold the signature string for a PNG file. */
const png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
#endif /* PNG_READ_SUPPORTED */
/* Invoke global declarations for constant strings for known chunk types */
PNG_IHDR;
@@ -49,6 +52,7 @@ PNG_tIME;
PNG_tRNS;
PNG_zTXt;
#ifdef PNG_READ_SUPPORTED
/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* start of interlace block */
@@ -80,7 +84,8 @@ const int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
const int FARDATA png_pass_dsp_mask[]
= {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
#endif
#endif /* PNG_READ_SUPPORTED */
#endif /* PNG_USE_GLOBAL_ARRAYS */
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
@@ -88,9 +93,11 @@ const int FARDATA png_pass_dsp_mask[]
* or write any of the magic bytes before it starts on the IHDR.
*/
#ifdef PNG_READ_SUPPORTED
void PNGAPI
png_set_sig_bytes(png_structp png_ptr, int num_bytes)
{
if(png_ptr == NULL) return;
png_debug(1, "in png_set_sig_bytes\n");
if (num_bytes > 8)
png_error(png_ptr, "Too many bytes for PNG signature.");
@@ -113,10 +120,10 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
if (num_to_check > 8)
num_to_check = 8;
else if (num_to_check < 1)
return (0);
return (-1);
if (start > 7)
return (0);
return (-1);
if (start + num_to_check > 8)
num_to_check = 8 - start;
@@ -124,6 +131,7 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
}
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* (Obsolete) function to check signature bytes. It does not allow one
* to check a partial signature. This function might be removed in the
* future - use png_sig_cmp(). Returns true (nonzero) if the file is a PNG.
@@ -133,7 +141,10 @@ png_check_sig(png_bytep sig, int num)
{
return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
}
#endif
#endif /* PNG_READ_SUPPORTED */
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
/* Function to allocate memory for zlib and clear it to 0. */
#ifdef PNG_1_0_X
voidpf PNGAPI
@@ -143,13 +154,14 @@ voidpf /* private */
png_zalloc(voidpf png_ptr, uInt items, uInt size)
{
png_voidp ptr;
png_structp p=png_ptr;
png_structp p=(png_structp)png_ptr;
png_uint_32 save_flags=p->flags;
png_uint_32 num_bytes;
if(png_ptr == NULL) return (NULL);
if (items > PNG_UINT_32_MAX/size)
{
png_warning (png_ptr, "Potential overflow in png_zalloc()");
png_warning (p, "Potential overflow in png_zalloc()");
return (NULL);
}
num_bytes = (png_uint_32)items * size;
@@ -256,6 +268,7 @@ void PNGAPI
png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
{
png_infop info_ptr = NULL;
if(png_ptr == NULL) return;
png_debug(1, "in png_destroy_info_struct\n");
if (info_ptr_ptr != NULL)
@@ -279,6 +292,7 @@ png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
* and applications using it are urged to use png_create_info_struct()
* instead.
*/
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
#undef png_info_init
void PNGAPI
png_info_init(png_infop info_ptr)
@@ -286,12 +300,15 @@ 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);
}
#endif
void PNGAPI
png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
{
png_infop info_ptr = *ptr_ptr;
if(info_ptr == NULL) return;
png_debug(1, "in png_info_init_3\n");
if(png_sizeof(png_info) > png_info_struct_size)
@@ -590,6 +607,7 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
png_info_init_3(&info_ptr, png_sizeof(png_info));
}
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
/* This function returns a pointer to the io_ptr associated with the user
* functions. The application should free any memory associated with this
@@ -598,9 +616,11 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
png_voidp PNGAPI
png_get_io_ptr(png_structp png_ptr)
{
if(png_ptr == NULL) return (NULL);
return (png_ptr->io_ptr);
}
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#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()
@@ -612,6 +632,7 @@ void PNGAPI
png_init_io(png_structp png_ptr, png_FILE_p fp)
{
png_debug(1, "in png_init_io\n");
if(png_ptr == NULL) return;
png_ptr->io_ptr = (png_voidp)fp;
}
#endif
@@ -627,6 +648,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
if(png_ptr == NULL) return (NULL);
if (png_ptr->time_buffer == NULL)
{
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
@@ -673,13 +695,14 @@ png_sig_bytes(void)
return ((png_bytep)"\211\120\116\107\015\012\032\012");
}
#endif
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
png_charp PNGAPI
png_get_copyright(png_structp png_ptr)
{
if (&png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return ((png_charp) "\n libpng version 1.2.7 - September 12, 2004\n\
Copyright (c) 1998-2005 Glenn Randers-Pehrson\n\
return ((png_charp) "\n libpng version 1.2.16 - January 31, 2007\n\
Copyright (c) 1998-2007 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) "");
@@ -720,6 +743,7 @@ png_get_header_version(png_structp png_ptr)
return ((png_charp) "");
}
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int PNGAPI
png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
@@ -741,8 +765,10 @@ png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
int PNGAPI
png_reset_zstream(png_structp png_ptr)
{
if (png_ptr == NULL) return Z_STREAM_ERROR;
return (inflateReset(&png_ptr->zstream));
}
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
/* This function was added to libpng-1.0.7 */
png_uint_32 PNGAPI
@@ -753,13 +779,14 @@ png_access_version_number(void)
}
#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)
#if !defined(PNG_1_0_X)
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
#if 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)
{
if(png_ptr == NULL) return;
png_ptr->mmx_rowbytes_threshold = 0;
png_ptr->mmx_bitdepth_threshold = 0;
@@ -792,7 +819,7 @@ png_init_mmx_flags (png_structp png_ptr)
| PNG_MMX_WRITE_FLAGS );
}
# else /* !((PNGVCRD || PNGGCCRD) && PNG_ASSEMBLER_CODE_SUPPORTED)) */
# else /* !(PNGVCRD || PNGGCCRD) */
/* clear all MMX flags; no support is compiled in */
png_ptr->asm_flags &= ~( PNG_MMX_FLAGS );
@@ -800,19 +827,21 @@ png_init_mmx_flags (png_structp png_ptr)
# endif /* ?(PNGVCRD || PNGGCCRD) */
}
#endif /* !(PNG_ASSEMBLER_CODE_SUPPORTED) */
#endif /* !(PNG_MMX_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))
!(defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD))
int PNGAPI
png_mmx_support(void)
{
return -1;
}
#endif
#endif /* PNG_1_0_X */
#endif /* PNG_1_0_X && PNG_ASSEMBLER_CODE_SUPPORTED */
#endif /* PNG_READ_SUPPORTED */
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#ifdef PNG_SIZE_T
/* Added at libpng version 1.2.6 */
PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
@@ -824,3 +853,4 @@ png_convert_size(size_t size)
return ((png_size_t)size);
}
#endif /* PNG_SIZE_T */
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */

283
png/png.h
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File diff suppressed because it is too large Load Diff

133
png/pngconf.h
View File

@@ -1,9 +1,9 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.2.7 - September 12, 2004
* libpng version 1.2.16 - January 31, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*/
@@ -17,10 +17,64 @@
#ifndef PNGCONF_H
#define PNGCONF_H
#define PNG_1_2_X
/*
* PNG_USER_CONFIG has to be defined on the compiler command line. This
* includes the resource compiler for Windows DLL configurations.
*/
#ifdef PNG_USER_CONFIG
# ifndef PNG_USER_PRIVATEBUILD
# define PNG_USER_PRIVATEBUILD
# endif
#include "pngusr.h"
#endif
/* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */
#ifdef PNG_CONFIGURE_LIBPNG
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#endif
/*
* Added at libpng-1.2.8
*
* If you create a private DLL you need to define in "pngusr.h" the followings:
* #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
* the DLL was built>
* e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
* #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
* distinguish your DLL from those of the official release. These
* correspond to the trailing letters that come after the version
* number and must match your private DLL name>
* e.g. // private DLL "libpng13gx.dll"
* #define PNG_USER_DLLFNAME_POSTFIX "gx"
*
* The following macros are also at your disposal if you want to complete the
* DLL VERSIONINFO structure.
* - PNG_USER_VERSIONINFO_COMMENTS
* - PNG_USER_VERSIONINFO_COMPANYNAME
* - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
*/
#ifdef __STDC__
#ifdef SPECIALBUILD
# pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
#endif
#ifdef PRIVATEBUILD
# pragma message("PRIVATEBUILD is deprecated.\
Use PNG_USER_PRIVATEBUILD instead.")
# define PNG_USER_PRIVATEBUILD PRIVATEBUILD
#endif
#endif /* __STDC__ */
#ifndef PNG_VERSION_INFO_ONLY
/* End of material added to libpng-1.2.8 */
/* This is the size of the compression buffer, and thus the size of
* an IDAT chunk. Make this whatever size you feel is best for your
* machine. One of these will be allocated per png_struct. When this
@@ -409,21 +463,33 @@
*/
/* The size of the png_text structure changed in libpng-1.0.6 when
* iTXt is supported. It is turned off by default, to support old apps
* that malloc the png_text structure instead of calling png_set_text()
* and letting libpng malloc it. It will be turned on by default in
* libpng-1.3.0.
* iTXt support was added. iTXt support was turned off by default through
* libpng-1.2.x, to support old apps that malloc the png_text structure
* instead of calling png_set_text() and letting libpng malloc it. It
* was turned on by default in libpng-1.3.0.
*/
#ifndef PNG_iTXt_SUPPORTED
# if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
# ifndef PNG_NO_iTXt_SUPPORTED
# define PNG_NO_iTXt_SUPPORTED
# endif
# ifndef PNG_NO_READ_iTXt
# define PNG_NO_READ_iTXt
# endif
# if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
# ifndef PNG_NO_WRITE_iTXt
# define PNG_NO_WRITE_iTXt
# endif
#endif
#if !defined(PNG_NO_iTXt_SUPPORTED)
# if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
# define PNG_READ_iTXt
# endif
# if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
# define PNG_WRITE_iTXt
# endif
#endif
/* The following support, added after version 1.0.0, can be turned off here en
* masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
* with old applications that require the length of png_struct and png_info
@@ -541,11 +607,13 @@
# endif
#endif
#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
/* Deprecated, will be removed from version 2.0.0.
Use PNG_MNG_FEATURES_SUPPORTED instead. */
#ifndef PNG_NO_READ_EMPTY_PLTE
# define PNG_READ_EMPTY_PLTE_SUPPORTED
#endif
#endif
#endif /* PNG_READ_SUPPORTED */
@@ -589,11 +657,15 @@
# endif
#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
#if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
!defined(PNG_WRITE_INTERLACING_SUPPORTED)
#define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
encoders, but can cause trouble
if left undefined */
#endif
#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
!defined(PNG_WRITE_WEIGHTED_FILTER) && \
defined(PNG_FLOATING_POINT_SUPPORTED)
# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
#endif
@@ -602,10 +674,12 @@
# define PNG_WRITE_FLUSH_SUPPORTED
#endif
#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
#ifndef PNG_NO_WRITE_EMPTY_PLTE
# define PNG_WRITE_EMPTY_PLTE_SUPPORTED
#endif
#endif
#endif /* PNG_WRITE_SUPPORTED */
@@ -647,15 +721,33 @@
#endif
/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
* even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined.
*
* PNG_NO_ASSEMBLER_CODE disables use of all assembler code and optimized C,
* and removes or includes several functions in the API.
*
* PNG_NO_MMX_CODE disables the use of MMX code without changing the API.
* When MMX code is off, then optimized C replacement functions are used.
*/
#if 0 /* DISABLE AT ALL TIMES */
#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
# ifndef PNG_ASSEMBLER_CODE_SUPPORTED
# define PNG_ASSEMBLER_CODE_SUPPORTED
# endif
# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
# if defined(XP_MACOSX) && !defined(PNG_NO_MMX_CODE)
/* work around Intel-Mac compiler bug */
# define PNG_NO_MMX_CODE
# endif
# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE) && \
defined(__MMX__)
# define PNG_MMX_CODE_SUPPORTED
# endif
# if !defined(PNG_USE_PNGGCCRD) && !defined(PNG_NO_MMX_CODE) && \
!defined(PNG_USE_PNGVCRD) && defined(__MMX__)
# define PNG_USE_PNGGCCRD
# endif
#endif
#endif /* 0 */
/* If you are sure that you don't need thread safety and you are compiling
with PNG_USE_PNGCCRD for an MMX application, you can define this for
@@ -1121,6 +1213,9 @@ typedef double FAR * FAR * png_doublepp;
/* Pointers to pointers to pointers; i.e., pointer to array */
typedef char FAR * FAR * FAR * png_charppp;
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* SPC - Is this stuff deprecated? */
/* It'll be removed as of libpng-1.3.0 - GR-P */
/* libpng typedefs for types in zlib. If zlib changes
* or another compression library is used, then change these.
* Eliminates need to change all the source files.
@@ -1128,6 +1223,7 @@ typedef char FAR * FAR * FAR * png_charppp;
typedef charf * png_zcharp;
typedef charf * FAR * png_zcharpp;
typedef z_stream FAR * png_zstreamp;
#endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
/*
* Define PNG_BUILD_DLL if the module being built is a Windows
@@ -1274,6 +1370,17 @@ typedef z_stream FAR * png_zstreamp;
# define PNG_IMPEXP
#endif
#ifdef PNG_BUILDSYMS
# ifndef PNG_EXPORT
# define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
# endif
# ifdef PNG_USE_GLOBAL_ARRAYS
# ifndef PNG_EXPORT_VAR
# define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
# endif
# endif
#endif
#ifndef PNG_EXPORT
# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
#endif
@@ -1372,5 +1479,7 @@ typedef z_stream FAR * png_zstreamp;
#endif /* PNG_INTERNAL */
#endif /* PNG_READ_SUPPORTED */
#endif /* PNGCONF_H */
/* Added at libpng-1.2.8 */
#endif /* PNG_VERSION_INFO_ONLY */
#endif /* PNGCONF_H */

37
png/pngerror.c
View File

@@ -1,9 +1,9 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.13 November 13, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2006 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.)
*
@@ -16,6 +16,7 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
static void /* PRIVATE */
png_default_error PNGARG((png_structp png_ptr,
png_const_charp error_message));
@@ -33,7 +34,10 @@ 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))
if (png_ptr != NULL)
{
if (png_ptr->flags&
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
{
if (*error_message == '#')
{
@@ -62,6 +66,7 @@ png_error(png_structp png_ptr, png_const_charp error_message)
}
}
}
}
#endif
if (png_ptr != NULL && png_ptr->error_fn != NULL)
(*(png_ptr->error_fn))(png_ptr, error_message);
@@ -80,8 +85,11 @@ void PNGAPI
png_warning(png_structp png_ptr, png_const_charp warning_message)
{
int offset = 0;
if (png_ptr != NULL)
{
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
if (png_ptr->flags&
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
#endif
{
if (*warning_message == '#')
@@ -93,6 +101,7 @@ png_warning(png_structp png_ptr, png_const_charp warning_message)
}
if (png_ptr != NULL && png_ptr->warning_fn != NULL)
(*(png_ptr->warning_fn))(png_ptr, warning_message+offset);
}
else
png_default_warning(png_ptr, warning_message+offset);
}
@@ -146,17 +155,27 @@ void PNGAPI
png_chunk_error(png_structp png_ptr, png_const_charp error_message)
{
char msg[18+64];
if (png_ptr == NULL)
png_error(png_ptr, error_message);
else
{
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];
if (png_ptr == NULL)
png_warning(png_ptr, warning_message);
else
{
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
@@ -193,6 +212,8 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
#endif
#ifdef PNG_SETJMP_SUPPORTED
if (png_ptr)
{
# ifdef USE_FAR_KEYWORD
{
jmp_buf jmpbuf;
@@ -202,9 +223,8 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
# else
longjmp(png_ptr->jmpbuf, 1);
# endif
}
#else
/* make compiler happy */ ;
if (png_ptr)
PNG_ABORT();
#endif
#ifdef PNG_NO_CONSOLE_IO
@@ -265,6 +285,8 @@ void PNGAPI
png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
png_error_ptr error_fn, png_error_ptr warning_fn)
{
if (png_ptr == NULL)
return;
png_ptr->error_ptr = error_ptr;
png_ptr->error_fn = error_fn;
png_ptr->warning_fn = warning_fn;
@@ -278,6 +300,8 @@ png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
png_voidp PNGAPI
png_get_error_ptr(png_structp png_ptr)
{
if (png_ptr == NULL)
return NULL;
return ((png_voidp)png_ptr->error_ptr);
}
@@ -293,3 +317,4 @@ png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
}
}
#endif
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

37
png/pngget.c
View File

@@ -1,9 +1,9 @@
/* pngget.c - retrieval of values from info struct
*
* libpng 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*/
@@ -11,6 +11,8 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
png_uint_32 PNGAPI
png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
{
@@ -557,9 +559,9 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
*interlace_type = info_ptr->interlace_type;
/* check for potential overflow of rowbytes */
if (width == 0 || *width > PNG_UINT_31_MAX)
if (*width == 0 || *width > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image width");
if (height == 0 || *height > PNG_UINT_31_MAX)
if (*height == 0 || *height > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image height");
if (info_ptr->width > (PNG_UINT_32_MAX
>> 3) /* 8-byte RGBA pixels */
@@ -827,19 +829,24 @@ png_get_compression_buffer_size(png_structp png_ptr)
}
#endif
#ifndef PNG_1_0_X
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
#ifndef PNG_1_0_X
/* 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)
{
#ifdef PNG_MMX_CODE_SUPPORTED
return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
#else
return (png_ptr? 0L: 0L);
#endif
}
/* 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)
{
#ifdef PNG_MMX_CODE_SUPPORTED
png_uint_32 settable_asm_flags = 0;
if (flag_select & PNG_SELECT_READ)
@@ -860,16 +867,18 @@ png_get_asm_flagmask (int flag_select)
#endif /* 0 */
return settable_asm_flags; /* _theoretically_ settable capabilities only */
#else
return (0L);
#endif /* PNG_MMX_CODE_SUPPORTED */
}
#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)
{
#if defined(PNG_MMX_CODE_SUPPORTED)
png_uint_32 settable_mmx_flags = 0;
if (flag_select & PNG_SELECT_READ)
@@ -900,21 +909,33 @@ png_get_mmx_flagmask (int flag_select, int *compilerID)
}
return settable_mmx_flags; /* _theoretically_ settable capabilities only */
#else
return (0L);
#endif /* ?PNG_MMX_CODE_SUPPORTED */
}
/* this function was added to libpng 1.2.0 */
png_byte PNGAPI
png_get_mmx_bitdepth_threshold (png_structp png_ptr)
{
#if defined(PNG_MMX_CODE_SUPPORTED)
return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
#else
return (png_ptr? 0: 0);
#endif /* ?PNG_MMX_CODE_SUPPORTED */
}
/* this function was added to libpng 1.2.0 */
png_uint_32 PNGAPI
png_get_mmx_rowbytes_threshold (png_structp png_ptr)
{
#if defined(PNG_MMX_CODE_SUPPORTED)
return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
#else
return (png_ptr? 0L: 0L);
#endif /* ?PNG_MMX_CODE_SUPPORTED */
}
#endif /* ?PNG_1_0_X */
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
@@ -931,4 +952,4 @@ png_get_user_height_max (png_structp png_ptr)
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
#endif /* ?PNG_1_0_X */
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

19
png/pngmem.c
View File

@@ -1,9 +1,9 @@
/* pngmem.c - stub functions for memory allocation
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.13 November 13, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2006 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.)
*
@@ -17,6 +17,8 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
/* 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 */
@@ -135,6 +137,9 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
png_voidp ret;
#endif /* PNG_USER_MEM_SUPPORTED */
if (png_ptr == NULL || size == 0)
return (NULL);
#ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
{
@@ -288,6 +293,8 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
{
#endif /* PNG_USER_MEM_SUPPORTED */
if(png_ptr == NULL) return;
if (png_ptr->offset_table != NULL)
{
int i;
@@ -534,8 +541,10 @@ 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_uint_32 save_flags;
if(png_ptr == NULL) return (NULL);
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;
@@ -578,10 +587,12 @@ void PNGAPI
png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
malloc_fn, png_free_ptr free_fn)
{
if(png_ptr != NULL) {
png_ptr->mem_ptr = mem_ptr;
png_ptr->malloc_fn = malloc_fn;
png_ptr->free_fn = free_fn;
}
}
/* This function returns a pointer to the mem_ptr associated with the user
* functions. The application should free any memory associated with this
@@ -590,6 +601,8 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
png_voidp PNGAPI
png_get_mem_ptr(png_structp png_ptr)
{
if(png_ptr == NULL) return (NULL);
return ((png_voidp)png_ptr->mem_ptr);
}
#endif /* PNG_USER_MEM_SUPPORTED */
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

17
png/pngpread.c
View File

@@ -1,9 +1,9 @@
/* pngpread.c - read a png file in push mode
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.13 November 13, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2006 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.)
*/
@@ -28,6 +28,7 @@ void PNGAPI
png_process_data(png_structp png_ptr, png_infop info_ptr,
png_bytep buffer, png_size_t buffer_size)
{
if(png_ptr == NULL) return;
png_push_restore_buffer(png_ptr, buffer, buffer_size);
while (png_ptr->buffer_size)
@@ -42,6 +43,7 @@ png_process_data(png_structp png_ptr, png_infop info_ptr,
void /* PRIVATE */
png_process_some_data(png_structp png_ptr, png_infop info_ptr)
{
if(png_ptr == NULL) return;
switch (png_ptr->process_mode)
{
case PNG_READ_SIG_MODE:
@@ -214,6 +216,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
}
if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
if(png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
@@ -281,6 +287,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
if (png_ptr->mode & PNG_HAVE_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
if (png_ptr->push_length == 0)
return;
@@ -556,6 +563,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
{
png_bytep ptr;
if(png_ptr == NULL) return;
ptr = buffer;
if (png_ptr->save_buffer_size)
{
@@ -815,7 +823,7 @@ png_push_process_row(png_structp png_ptr)
png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
png_ptr->rowbytes + 1);
if (png_ptr->transformations)
if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
png_do_read_transformations(png_ptr);
#if defined(PNG_READ_INTERLACING_SUPPORTED)
@@ -1545,6 +1553,7 @@ void PNGAPI
png_progressive_combine_row (png_structp png_ptr,
png_bytep old_row, png_bytep new_row)
{
if(png_ptr == NULL) return;
#ifdef PNG_USE_LOCAL_ARRAYS
const int FARDATA png_pass_dsp_mask[7] =
{0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
@@ -1558,6 +1567,7 @@ png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
png_progressive_end_ptr end_fn)
{
if(png_ptr == NULL) return;
png_ptr->info_fn = info_fn;
png_ptr->row_fn = row_fn;
png_ptr->end_fn = end_fn;
@@ -1568,6 +1578,7 @@ png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
png_voidp PNGAPI
png_get_progressive_ptr(png_structp png_ptr)
{
if(png_ptr == NULL) return (NULL);
return png_ptr->io_ptr;
}
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */

48
png/pngread.c
View File

@@ -1,9 +1,9 @@
/* pngread.c - read a PNG file
*
* libpng 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*
@@ -14,6 +14,8 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED)
/* Create a PNG structure for reading, and allocate any memory needed. */
png_structp PNGAPI
png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr,
@@ -54,7 +56,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
return (NULL);
#if !defined(PNG_1_0_X)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
#ifdef PNG_MMX_CODE_SUPPORTED
png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
#endif
#endif /* PNG_1_0_X */
@@ -169,9 +171,10 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
return (png_ptr);
}
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* Initialize PNG structure for reading, and allocate any memory needed.
This interface is deprecated in favour of the png_create_read_struct(),
and it will eventually disappear. */
and it will disappear as of libpng-1.3.0. */
#undef png_read_init
void PNGAPI
png_read_init(png_structp png_ptr)
@@ -185,6 +188,7 @@ png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver,
png_size_t png_struct_size, png_size_t png_info_size)
{
/* We only come here via pre-1.0.12-compiled applications */
if(png_ptr == NULL) return;
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
if(png_sizeof(png_struct) > png_struct_size ||
png_sizeof(png_info) > png_info_size)
@@ -222,6 +226,7 @@ png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver,
}
png_read_init_3(&png_ptr, user_png_ver, png_struct_size);
}
#endif /* PNG_1_0_X || PNG_1_2_X */
void PNGAPI
png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
@@ -235,6 +240,8 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_structp png_ptr=*ptr_ptr;
if(png_ptr == NULL) return;
do
{
if(user_png_ver[i] != png_libpng_ver[i])
@@ -313,6 +320,7 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
void PNGAPI
png_read_info(png_structp png_ptr, png_infop info_ptr)
{
if(png_ptr == NULL) return;
png_debug(1, "in png_read_info\n");
/* If we haven't checked all of the PNG signature bytes, do so now. */
if (png_ptr->sig_bytes < 8)
@@ -393,7 +401,7 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_READ_zTXt_SUPPORTED)
PNG_zTXt;
#endif
#endif /* PNG_GLOBAL_ARRAYS */
#endif /* PNG_USE_LOCAL_ARRAYS */
png_byte chunk_length[4];
png_uint_32 length;
@@ -409,6 +417,10 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
/* This should be a binary subdivision search or a hash for
* matching the chunk name rather than a linear search.
*/
if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
if(png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
png_handle_IHDR(png_ptr, info_ptr, length);
else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
@@ -525,6 +537,7 @@ void PNGAPI
png_read_update_info(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_read_update_info\n");
if(png_ptr == NULL) return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
else
@@ -543,6 +556,7 @@ void PNGAPI
png_start_read_image(png_structp png_ptr)
{
png_debug(1, "in png_start_read_image\n");
if(png_ptr == NULL) return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
}
@@ -558,6 +572,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
const int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
#endif
int ret;
if(png_ptr == NULL) return;
png_debug2(1, "in png_read_row (row %lu, pass %d)\n",
png_ptr->row_number, png_ptr->pass);
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
@@ -744,7 +759,8 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
}
#endif
if (png_ptr->transformations)
if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
png_do_read_transformations(png_ptr);
#if defined(PNG_READ_INTERLACING_SUPPORTED)
@@ -803,7 +819,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
* not called png_set_interlace_handling(), the display_row buffer will
* be ignored, so pass NULL to it.
*
* [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.7
* [*] png_handle_alpha() does not exist yet, as of this version of libpng
*/
void PNGAPI
@@ -815,6 +831,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
png_bytepp dp;
png_debug(1, "in png_read_rows\n");
if(png_ptr == NULL) return;
rp = row;
dp = display_row;
if (rp != NULL && dp != NULL)
@@ -853,7 +870,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
* only call this function once. If you desire to have an image for
* each pass of a interlaced image, use png_read_rows() instead.
*
* [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.7
* [*] png_handle_alpha() does not exist yet, as of this version of libpng
*/
void PNGAPI
png_read_image(png_structp png_ptr, png_bytepp image)
@@ -863,6 +880,7 @@ png_read_image(png_structp png_ptr, png_bytepp image)
png_bytepp rp;
png_debug(1, "in png_read_image\n");
if(png_ptr == NULL) return;
#ifdef PNG_READ_INTERLACING_SUPPORTED
pass = png_set_interlace_handling(png_ptr);
@@ -901,6 +919,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
png_uint_32 length;
png_debug(1, "in png_read_end\n");
if(png_ptr == NULL) return;
png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
do
@@ -961,7 +980,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_READ_zTXt_SUPPORTED)
PNG_zTXt;
#endif
#endif /* PNG_GLOBAL_ARRAYS */
#endif /* PNG_USE_LOCAL_ARRAYS */
png_read_data(png_ptr, chunk_length, 4);
length = png_get_uint_31(png_ptr,chunk_length);
@@ -980,11 +999,9 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
{
if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
{
if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT)
if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
png_error(png_ptr, "Too many IDAT's found");
}
else
png_ptr->mode |= PNG_AFTER_IDAT;
png_handle_unknown(png_ptr, info_ptr, length);
if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
png_ptr->mode |= PNG_HAVE_PLTE;
@@ -995,7 +1012,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
/* Zero length IDATs are legal after the last IDAT has been
* read, but not after other chunks have been read.
*/
if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT)
if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
png_error(png_ptr, "Too many IDAT's found");
png_crc_finish(png_ptr, length);
}
@@ -1293,6 +1310,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
void PNGAPI
png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
{
if(png_ptr == NULL) return;
png_ptr->read_row_fn = read_row_fn;
}
@@ -1306,6 +1324,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
{
int row;
if(png_ptr == NULL) return;
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED)
/* invert the alpha channel from opacity to transparency
*/
@@ -1449,5 +1468,6 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
/* quiet compiler warnings */ return;
}
#endif
#endif /* PNG_INFO_IMAGE_SUPPORTED */
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
#endif /* PNG_READ_SUPPORTED */

12
png/pngrio.c
View File

@@ -1,9 +1,9 @@
/* pngrio.c - functions for data input
*
* libpng 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.13 November 13, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2006 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.)
*
@@ -18,6 +18,8 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED)
/* Read the data from whatever input you are using. The default routine
reads from a file pointer. Note that this routine sometimes gets called
with very small lengths, so you should implement some kind of simple
@@ -44,6 +46,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_size_t check;
if(png_ptr == NULL) return;
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
* instead of an int, which is what fread() actually returns.
*/
@@ -67,13 +70,14 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
static void /* PRIVATE */
static void PNGAPI
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;
if(png_ptr == NULL) return;
/* 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);
@@ -134,6 +138,7 @@ void PNGAPI
png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr read_data_fn)
{
if(png_ptr == NULL) return;
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
@@ -159,3 +164,4 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
png_ptr->output_flush_fn = NULL;
#endif
}
#endif /* PNG_READ_SUPPORTED */

160
png/pngrtran.c
View File

@@ -1,9 +1,9 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*
@@ -16,12 +16,15 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED)
/* Set the action on getting a CRC error for an ancillary or critical chunk. */
void PNGAPI
png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
{
png_debug(1, "in png_set_crc_action\n");
/* Tell libpng how we react to CRC errors in critical chunks */
if(png_ptr == NULL) return;
switch (crit_action)
{
case PNG_CRC_NO_CHANGE: /* leave setting as is */
@@ -78,6 +81,7 @@ png_set_background(png_structp png_ptr,
int need_expand, double background_gamma)
{
png_debug(1, "in png_set_background\n");
if(png_ptr == NULL) return;
if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
{
png_warning(png_ptr, "Application must supply a known background gamma");
@@ -90,17 +94,6 @@ png_set_background(png_structp png_ptr,
png_ptr->background_gamma = (float)background_gamma;
png_ptr->background_gamma_type = (png_byte)(background_gamma_code);
png_ptr->transformations |= (need_expand ? PNG_BACKGROUND_EXPAND : 0);
/* Note: if need_expand is set and color_type is either RGB or RGB_ALPHA
* (in which case need_expand is superfluous anyway), the background color
* might actually be gray yet not be flagged as such. This is not a problem
* for the current code, which uses PNG_BACKGROUND_IS_GRAY only to
* decide when to do the png_do_gray_to_rgb() transformation.
*/
if ((need_expand && !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) ||
(!need_expand && background_color->red == background_color->green &&
background_color->red == background_color->blue))
png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
}
#endif
@@ -110,6 +103,7 @@ void PNGAPI
png_set_strip_16(png_structp png_ptr)
{
png_debug(1, "in png_set_strip_16\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_16_TO_8;
}
#endif
@@ -119,7 +113,8 @@ void PNGAPI
png_set_strip_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_strip_alpha\n");
png_ptr->transformations |= PNG_STRIP_ALPHA;
if(png_ptr == NULL) return;
png_ptr->flags |= PNG_FLAG_STRIP_ALPHA;
}
#endif
@@ -148,6 +143,7 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
int full_dither)
{
png_debug(1, "in png_set_dither\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_DITHER;
if (!full_dither)
@@ -531,6 +527,7 @@ void PNGAPI
png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
{
png_debug(1, "in png_set_gamma\n");
if(png_ptr == NULL) return;
if ((fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) ||
(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
@@ -549,7 +546,8 @@ void PNGAPI
png_set_expand(png_structp png_ptr)
{
png_debug(1, "in png_set_expand\n");
png_ptr->transformations |= PNG_EXPAND;
if(png_ptr == NULL) return;
png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
}
/* GRR 19990627: the following three functions currently are identical
@@ -564,30 +562,50 @@ png_set_expand(png_structp png_ptr)
*
* More to the point, these functions make it obvious what libpng will be
* doing, whereas "expand" can (and does) mean any number of things.
*
* GRP 20060307: In libpng-1.4.0, png_set_gray_1_2_4_to_8() was modified
* to expand only the sample depth but not to expand the tRNS to alpha.
*/
/* Expand paletted images to RGB. */
void PNGAPI
png_set_palette_to_rgb(png_structp png_ptr)
{
png_debug(1, "in png_set_expand\n");
png_ptr->transformations |= PNG_EXPAND;
png_debug(1, "in png_set_palette_to_rgb\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
}
#if !defined(PNG_1_0_X)
/* Expand grayscale images of less than 8-bit depth to 8 bits. */
void PNGAPI
png_set_expand_gray_1_2_4_to_8(png_structp png_ptr)
{
png_debug(1, "in png_set_expand_gray_1_2_4_to_8\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_EXPAND_tRNS;
}
#endif
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* Expand grayscale images of less than 8-bit depth to 8 bits. */
/* Deprecated as of libpng-1.2.9 */
void PNGAPI
png_set_gray_1_2_4_to_8(png_structp png_ptr)
{
png_debug(1, "in png_set_expand\n");
png_ptr->transformations |= PNG_EXPAND;
png_debug(1, "in png_set_gray_1_2_4_to_8\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
}
#endif
/* Expand tRNS chunks to alpha channels. */
void PNGAPI
png_set_tRNS_to_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_expand\n");
png_ptr->transformations |= PNG_EXPAND;
png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
}
#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */
@@ -612,6 +630,7 @@ png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red,
{
int red_fixed = (int)((float)red*100000.0 + 0.5);
int green_fixed = (int)((float)green*100000.0 + 0.5);
if(png_ptr == NULL) return;
png_set_rgb_to_gray_fixed(png_ptr, error_action, red_fixed, green_fixed);
}
#endif
@@ -621,6 +640,7 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
png_fixed_point red, png_fixed_point green)
{
png_debug(1, "in png_set_rgb_to_gray\n");
if(png_ptr == NULL) return;
switch(error_action)
{
case 1: png_ptr->transformations |= PNG_RGB_TO_GRAY;
@@ -671,6 +691,7 @@ png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
read_user_transform_fn)
{
png_debug(1, "in png_set_read_user_transform_fn\n");
if(png_ptr == NULL) return;
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->read_user_transform_fn = read_user_transform_fn;
@@ -700,28 +721,72 @@ png_init_read_transformations(png_structp png_ptr)
#endif
#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED)
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
/* Detect gray background and attempt to enable optimization
* for gray --> RGB case */
/* Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or
* RGB_ALPHA (in which case need_expand is superfluous anyway), the
* background color might actually be gray yet not be flagged as such.
* This is not a problem for the current code, which uses
* PNG_BACKGROUND_IS_GRAY only to decide when to do the
* png_do_gray_to_rgb() transformation.
*/
if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
!(color_type & PNG_COLOR_MASK_COLOR))
{
png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
} else if ((png_ptr->transformations & PNG_BACKGROUND) &&
!(png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
(png_ptr->transformations & PNG_GRAY_TO_RGB) &&
png_ptr->background.red == png_ptr->background.green &&
png_ptr->background.red == png_ptr->background.blue)
{
png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
png_ptr->background.gray = png_ptr->background.red;
}
#endif
if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
(png_ptr->transformations & PNG_EXPAND))
{
if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */
{
/* expand background chunk. */
/* expand background and tRNS chunks */
switch (png_ptr->bit_depth)
{
case 1:
png_ptr->background.gray *= (png_uint_16)0xff;
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_values.gray *= (png_uint_16)0xff;
png_ptr->trans_values.red = png_ptr->trans_values.green
= png_ptr->trans_values.blue = png_ptr->trans_values.gray;
}
break;
case 2:
png_ptr->background.gray *= (png_uint_16)0x55;
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_values.gray *= (png_uint_16)0x55;
png_ptr->trans_values.red = png_ptr->trans_values.green
= png_ptr->trans_values.blue = png_ptr->trans_values.gray;
}
break;
case 4:
png_ptr->background.gray *= (png_uint_16)0x11;
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_values.gray *= (png_uint_16)0x11;
png_ptr->trans_values.red = png_ptr->trans_values.green
= png_ptr->trans_values.blue = png_ptr->trans_values.gray;
}
break;
case 8:
case 16:
@@ -743,7 +808,7 @@ png_init_read_transformations(png_structp png_ptr)
if (png_ptr->transformations & PNG_INVERT_ALPHA)
{
#if defined(PNG_READ_EXPAND_SUPPORTED)
if (!(png_ptr->transformations & PNG_EXPAND))
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
#endif
{
/* invert the alpha channel (in tRNS) unless the pixels are
@@ -780,7 +845,8 @@ png_init_read_transformations(png_structp png_ptr)
png_ptr->transformations &= (~PNG_GAMMA);
}
if (png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY))
if ((png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY)) &&
png_ptr->gamma != 0.0)
{
png_build_gamma_table(png_ptr);
#if defined(PNG_READ_BACKGROUND_SUPPORTED)
@@ -1042,7 +1108,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
if (png_ptr->num_trans)
if (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND_tRNS))
info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
else
info_ptr->color_type = PNG_COLOR_TYPE_RGB;
@@ -1052,7 +1118,12 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
else
{
if (png_ptr->num_trans)
{
if (png_ptr->transformations & PNG_EXPAND_tRNS)
info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
else
info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
}
if (info_ptr->bit_depth < 8)
info_ptr->bit_depth = 8;
info_ptr->num_trans = 0;
@@ -1086,6 +1157,16 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->bit_depth = 8;
#endif
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
if (png_ptr->transformations & PNG_GRAY_TO_RGB)
info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
#endif
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR;
#endif
#if defined(PNG_READ_DITHER_SUPPORTED)
if (png_ptr->transformations & PNG_DITHER)
{
@@ -1103,16 +1184,6 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->bit_depth = 8;
#endif
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
if (png_ptr->transformations & PNG_GRAY_TO_RGB)
info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
#endif
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR;
#endif
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
info_ptr->channels = 1;
else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
@@ -1121,7 +1192,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->channels = 1;
#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
if (png_ptr->transformations & PNG_STRIP_ALPHA)
if (png_ptr->flags & PNG_FLAG_STRIP_ALPHA)
info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
#endif
@@ -1198,7 +1269,7 @@ png_do_read_transformations(png_structp png_ptr)
}
else
{
if (png_ptr->num_trans)
if (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND_tRNS))
png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
&(png_ptr->trans_values));
else
@@ -1209,9 +1280,9 @@ png_do_read_transformations(png_structp png_ptr)
#endif
#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
if (png_ptr->transformations & PNG_STRIP_ALPHA)
if (png_ptr->flags & PNG_FLAG_STRIP_ALPHA)
png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
PNG_FLAG_FILLER_AFTER);
PNG_FLAG_FILLER_AFTER | (png_ptr->flags & PNG_FLAG_STRIP_ALPHA));
#endif
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
@@ -2104,7 +2175,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
/* reduce RGB files to grayscale, with or without alpha
* using the equation given in Poynton's ColorFAQ at
* <http://www.inforamp.net/~poynton/>
* Copyright (c) 1998-01-04 Charles Poynton poynton@inforamp.net
* Copyright (c) 1998-01-04 Charles Poynton poynton at inforamp.net
*
* Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
*
@@ -3601,8 +3672,8 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
}
}
/* If the bit depth < 8, it is expanded to 8. Also, if the
* transparency value is supplied, an alpha channel is built.
/* If the bit depth < 8, it is expanded to 8. Also, if the already
* expanded transparency value is supplied, an alpha channel is built.
*/
void /* PRIVATE */
png_do_expand(png_row_infop row_info, png_bytep row,
@@ -3895,7 +3966,7 @@ png_do_dither(png_row_infop row_info, png_bytep row,
#ifdef PNG_FLOATING_POINT_SUPPORTED
#if defined(PNG_READ_GAMMA_SUPPORTED)
static int png_gamma_shift[] =
{0x10, 0x21, 0x42, 0x84, 0x110, 0x248, 0x550, 0xff0};
{0x10, 0x21, 0x42, 0x84, 0x110, 0x248, 0x550, 0xff0, 0x00};
/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit
* tables, we don't make a full table if we are reducing to 8-bit in
@@ -3906,8 +3977,7 @@ void /* PRIVATE */
png_build_gamma_table(png_structp png_ptr)
{
png_debug(1, "in png_build_gamma_table\n");
if(png_ptr->gamma != 0.0)
{
if (png_ptr->bit_depth <= 8)
{
int i;
@@ -4110,7 +4180,6 @@ png_build_gamma_table(png_structp png_ptr)
#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
}
}
}
#endif
/* To do: install integer version of png_build_gamma_table here */
#endif
@@ -4175,3 +4244,4 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
}
}
#endif /* PNG_MNG_FEATURES_SUPPORTED */
#endif /* PNG_READ_SUPPORTED */

76
png/pngrutil.c
View File

@@ -1,8 +1,9 @@
/* pngrutil.c - utilities to read a PNG file
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*
@@ -13,41 +14,45 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
# if defined(_WIN32_WCE)
/* strtod() function is not supported on WindowsCE */
# ifdef PNG_FLOATING_POINT_SUPPORTED
__inline double strtod(const char *nptr, char **endptr)
__inline double png_strtod(png_structp png_ptr, const char *nptr, char **endptr)
{
double result = 0;
int len;
wchar_t *str, *end;
len = MultiByteToWideChar(CP_ACP, 0, nptr, -1, NULL, 0);
str = (wchar_t *)malloc(len * sizeof(wchar_t));
str = (wchar_t *)png_malloc(png_ptr, len * sizeof(wchar_t));
if ( NULL != str )
{
MultiByteToWideChar(CP_ACP, 0, nptr, -1, str, len);
result = wcstod(str, &end);
len = WideCharToMultiByte(CP_ACP, 0, end, -1, NULL, 0, NULL, NULL);
*endptr = (char *)nptr + (png_strlen(nptr) - len + 1);
free(str);
png_free(str);
}
return result;
}
# else
# define png_strtod(p,a,b) strtod(a,b)
# endif
#endif
png_uint_32 /* PRIVATE */
png_uint_32 PNGAPI
png_get_uint_31(png_structp png_ptr, png_bytep buf)
{
png_uint_32 i = png_get_uint_32(buf);
if (i > PNG_UINT_31_MAX)
png_error(png_ptr, "PNG unsigned integer out of range.\n");
png_error(png_ptr, "PNG unsigned integer out of range.");
return (i);
}
#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
png_uint_32 /* PRIVATE */
png_uint_32 PNGAPI
png_get_uint_32(png_bytep buf)
{
png_uint_32 i = ((png_uint_32)(*buf) << 24) +
@@ -58,11 +63,10 @@ png_get_uint_32(png_bytep buf)
return (i);
}
#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_oFFs_SUPPORTED)
/* Grab a signed 32-bit integer from a buffer in big-endian format. The
* data is stored in the PNG file in two's complement format, and it is
* assumed that the machine format for signed integers is the same. */
png_int_32 /* PRIVATE */
png_int_32 PNGAPI
png_get_int_32(png_bytep buf)
{
png_int_32 i = ((png_int_32)(*buf) << 24) +
@@ -72,10 +76,9 @@ png_get_int_32(png_bytep buf)
return (i);
}
#endif /* PNG_READ_pCAL_SUPPORTED */
/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */
png_uint_16 /* PRIVATE */
png_uint_16 PNGAPI
png_get_uint_16(png_bytep buf)
{
png_uint_16 i = (png_uint_16)(((png_uint_16)(*buf) << 8) +
@@ -89,6 +92,7 @@ png_get_uint_16(png_bytep buf)
void /* PRIVATE */
png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length)
{
if(png_ptr == NULL) return;
png_read_data(png_ptr, buf, length);
png_calculate_crc(png_ptr, buf, length);
}
@@ -275,7 +279,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
if (ret != Z_STREAM_END)
{
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
char umsg[50];
char umsg[52];
if (ret == Z_BUF_ERROR)
sprintf(umsg,"Buffer error in compressed datastream in %s chunk",
@@ -619,7 +623,7 @@ png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
#if defined(PNG_READ_sRGB_SUPPORTED)
if (info_ptr->valid & PNG_INFO_sRGB)
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
if (PNG_OUT_OF_RANGE(igamma, 45500L, 500))
{
png_warning(png_ptr,
@@ -777,8 +781,7 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_crc_read(png_ptr, buf, 4);
uint_y = png_get_uint_32(buf);
if (uint_x > 80000L || uint_y > 80000L ||
uint_x + uint_y > 100000L)
if (uint_x + uint_y > 100000L)
{
png_warning(png_ptr, "Invalid cHRM red point");
png_crc_finish(png_ptr, 16);
@@ -793,8 +796,7 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_crc_read(png_ptr, buf, 4);
uint_y = png_get_uint_32(buf);
if (uint_x > 80000L || uint_y > 80000L ||
uint_x + uint_y > 100000L)
if (uint_x + uint_y > 100000L)
{
png_warning(png_ptr, "Invalid cHRM green point");
png_crc_finish(png_ptr, 8);
@@ -809,8 +811,7 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_crc_read(png_ptr, buf, 4);
uint_y = png_get_uint_32(buf);
if (uint_x > 80000L || uint_y > 80000L ||
uint_x + uint_y > 100000L)
if (uint_x + uint_y > 100000L)
{
png_warning(png_ptr, "Invalid cHRM blue point");
png_crc_finish(png_ptr, 0);
@@ -831,7 +832,7 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
#if defined(PNG_READ_sRGB_SUPPORTED)
if (info_ptr->valid & PNG_INFO_sRGB)
if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB))
{
if (PNG_OUT_OF_RANGE(int_x_white, 31270, 1000) ||
PNG_OUT_OF_RANGE(int_y_white, 32900, 1000) ||
@@ -842,7 +843,6 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
PNG_OUT_OF_RANGE(int_x_blue, 15000, 1000) ||
PNG_OUT_OF_RANGE(int_y_blue, 6000, 1000))
{
png_warning(png_ptr,
"Ignoring incorrect cHRM value when sRGB is also present");
#ifndef PNG_NO_CONSOLE_IO
@@ -926,7 +926,7 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
if ((info_ptr->valid & PNG_INFO_gAMA))
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA))
{
png_fixed_point igamma;
#ifdef PNG_FIXED_POINT_SUPPORTED
@@ -955,7 +955,7 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#ifdef PNG_READ_cHRM_SUPPORTED
#ifdef PNG_FIXED_POINT_SUPPORTED
if (info_ptr->valid & PNG_INFO_cHRM)
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
if (PNG_OUT_OF_RANGE(info_ptr->int_x_white, 31270, 1000) ||
PNG_OUT_OF_RANGE(info_ptr->int_y_white, 32900, 1000) ||
PNG_OUT_OF_RANGE(info_ptr->int_x_red, 64000L, 1000) ||
@@ -1079,7 +1079,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if(profile_size > profile_length)
{
png_free(png_ptr, chunkdata);
png_warning(png_ptr, "Ignoring truncated iCCP profile.\n");
png_warning(png_ptr, "Ignoring truncated iCCP profile.");
return;
}
@@ -1160,7 +1160,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
new_palette.nentries = (png_uint_32) (data_length / entry_size);
new_palette.nentries = (png_int_32) ( data_length / entry_size);
if ((png_uint_32) new_palette.nentries > (png_uint_32) (PNG_SIZE_MAX /
png_sizeof(png_sPLT_entry)))
{
@@ -1733,7 +1733,7 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
ep = buffer + 1; /* skip unit byte */
#ifdef PNG_FLOATING_POINT_SUPPORTED
width = strtod(ep, &vp);
width = png_strtod(png_ptr, ep, &vp);
if (*vp)
{
png_warning(png_ptr, "malformed width string in sCAL chunk");
@@ -1756,7 +1756,7 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
ep++;
#ifdef PNG_FLOATING_POINT_SUPPORTED
height = strtod(ep, &vp);
height = png_strtod(png_ptr, ep, &vp);
if (*vp)
{
png_warning(png_ptr, "malformed height string in sCAL chunk");
@@ -2170,7 +2170,8 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) ||
(png_ptr->read_user_chunk_fn != NULL))
{
png_unknown_chunk chunk;
@@ -2248,7 +2249,7 @@ png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name)
a zero indicates the pixel is to be skipped. This is in addition
to any alpha or transparency value associated with the pixel. If
you want all pixels to be combined, pass 0xff (255) in mask. */
#ifndef PNG_HAVE_ASSEMBLER_COMBINE_ROW
#ifndef PNG_HAVE_MMX_COMBINE_ROW
void /* PRIVATE */
png_combine_row(png_structp png_ptr, png_bytep row, int mask)
{
@@ -2449,10 +2450,10 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
}
}
}
#endif /* !PNG_HAVE_ASSEMBLER_COMBINE_ROW */
#endif /* !PNG_HAVE_MMX_COMBINE_ROW */
#ifdef PNG_READ_INTERLACING_SUPPORTED
#ifndef PNG_HAVE_ASSEMBLER_READ_INTERLACE /* else in pngvcrd.c, pnggccrd.c */
#ifndef PNG_HAVE_MMX_READ_INTERLACE /* else in pngvcrd.c, pnggccrd.c */
/* OLD pre-1.0.9 interface:
void png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
png_uint_32 transformations)
@@ -2678,10 +2679,10 @@ png_do_read_interlace(png_structp png_ptr)
return;
#endif
}
#endif /* !PNG_HAVE_ASSEMBLER_READ_INTERLACE */
#endif /* !PNG_HAVE_MMX_READ_INTERLACE */
#endif /* PNG_READ_INTERLACING_SUPPORTED */
#ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
#ifndef PNG_HAVE_MMX_READ_FILTER_ROW
void /* PRIVATE */
png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
png_bytep prev_row, int filter)
@@ -2804,7 +2805,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
break;
}
}
#endif /* !PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
#endif /* !PNG_HAVE_MMX_READ_FILTER_ROW */
void /* PRIVATE */
png_read_finish_row(png_structp png_ptr)
@@ -3106,7 +3107,7 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L)
png_error(png_ptr, "This image requires a row greater than 64KB");
#endif
if ((png_uint_32)png_ptr->rowbytes + 1 > PNG_SIZE_MAX)
if ((png_uint_32)png_ptr->rowbytes > (png_uint_32)(PNG_SIZE_MAX - 1))
png_error(png_ptr, "Row has too many bytes to allocate in memory.");
png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
png_ptr->rowbytes + 1));
@@ -3122,3 +3123,4 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
png_ptr->flags |= PNG_FLAG_ROW_INIT;
}
#endif /* PNG_READ_SUPPORTED */

86
png/pngset.c
View File

@@ -1,9 +1,9 @@
/* pngset.c - storage of image information into info struct
*
* libpng 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*
@@ -16,6 +16,8 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#if defined(PNG_bKGD_SUPPORTED)
void PNGAPI
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
@@ -100,6 +102,7 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
"Ignoring attempt to set negative chromaticity value");
return;
}
#ifdef PNG_FLOATING_POINT_SUPPORTED
if (white_x > (double) PNG_UINT_31_MAX ||
white_y > (double) PNG_UINT_31_MAX ||
red_x > (double) PNG_UINT_31_MAX ||
@@ -108,6 +111,16 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
green_y > (double) PNG_UINT_31_MAX ||
blue_x > (double) PNG_UINT_31_MAX ||
blue_y > (double) PNG_UINT_31_MAX)
#else
if (white_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
white_y > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
red_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
red_y > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
green_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
green_y > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
blue_x > (png_fixed_point) PNG_UINT_31_MAX/100000L ||
blue_y > (png_fixed_point) PNG_UINT_31_MAX/100000L)
#endif
{
png_warning(png_ptr,
"Ignoring attempt to set chromaticity value exceeding 21474.83");
@@ -209,19 +222,21 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
png_debug1(1, "in %s storage function\n", "hIST");
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->num_palette == 0)
if (info_ptr->num_palette <= 0 || info_ptr->num_palette
> PNG_MAX_PALETTE_LENGTH)
{
png_warning(png_ptr,
"Palette size 0, hIST allocation skipped.");
"Invalid palette size, hIST allocation skipped.");
return;
}
#ifdef PNG_FREE_ME_SUPPORTED
png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
#endif
/* Changed from info->num_palette to 256 in version 1.2.1 */
/* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
1.2.1 */
png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
(png_uint_32)(256 * png_sizeof (png_uint_16)));
(png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof (png_uint_16)));
if (png_ptr->hist == NULL)
{
png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
@@ -303,7 +318,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
* 5. The color_type is RGB or RGBA
*/
if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
png_warning(png_ptr,"MNG features are not allowed in a PNG datastream");
if(filter_type != PNG_FILTER_TYPE_BASE)
{
if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
@@ -517,6 +532,17 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
{
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Invalid palette length");
else
{
png_warning(png_ptr, "Invalid palette length");
return;
}
}
/*
* It may not actually be necessary to set png_ptr->palette here;
* we do it for backward compatibility with the way the png_handle_tRNS
@@ -526,11 +552,13 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
#endif
/* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
/* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
of num_palette entries,
in case of an invalid PNG file that has too-large sample values. */
png_ptr->palette = (png_colorp)png_malloc(png_ptr,
256 * png_sizeof(png_color));
png_memset(png_ptr->palette, 0, 256 * png_sizeof(png_color));
PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
png_sizeof(png_color));
png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color));
info_ptr->palette = png_ptr->palette;
info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
@@ -890,9 +918,10 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
#ifdef PNG_FREE_ME_SUPPORTED
png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
#endif
/* Changed from num_trans to 256 in version 1.2.1 */
/* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
(png_uint_32)256);
(png_uint_32)PNG_MAX_PALETTE_LENGTH);
if (num_trans <= PNG_MAX_PALETTE_LENGTH)
png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
#ifdef PNG_FREE_ME_SUPPORTED
info_ptr->free_me |= PNG_FREE_TRNS;
@@ -921,6 +950,9 @@ png_set_sPLT(png_structp png_ptr,
png_sPLT_tp np;
int i;
if (png_ptr == NULL || info_ptr == NULL)
return;
np = (png_sPLT_tp)png_malloc_warn(png_ptr,
(info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t));
if (np == NULL)
@@ -944,10 +976,10 @@ png_set_sPLT(png_structp png_ptr,
/* TODO: use png_malloc_warn */
png_strcpy(to->name, from->name);
to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
from->nentries * png_sizeof(png_sPLT_t));
from->nentries * png_sizeof(png_sPLT_entry));
/* TODO: use png_malloc_warn */
png_memcpy(to->entries, from->entries,
from->nentries * png_sizeof(png_sPLT_t));
from->nentries * png_sizeof(png_sPLT_entry));
to->nentries = from->nentries;
to->depth = from->depth;
}
@@ -1023,13 +1055,14 @@ png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
}
#endif
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
void PNGAPI
png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
{
/* This function is deprecated in favor of png_permit_mng_features()
and will be removed from libpng-2.0.0 */
and will be removed from libpng-1.3.0 */
png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
if (png_ptr == NULL)
return;
@@ -1038,6 +1071,7 @@ png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
}
#endif
#endif
#if defined(PNG_MNG_FEATURES_SUPPORTED)
png_uint_32 PNGAPI
@@ -1059,6 +1093,8 @@ png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
{
png_bytep new_list, p;
int i, old_num_chunks;
if (png_ptr == NULL)
return;
if (num_chunks == 0)
{
if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
@@ -1102,6 +1138,8 @@ png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
png_user_chunk_ptr read_user_chunk_fn)
{
png_debug(1, "in png_set_read_user_chunk_fn\n");
if (png_ptr == NULL)
return;
png_ptr->read_user_chunk_fn = read_user_chunk_fn;
png_ptr->user_chunk_ptr = user_chunk_ptr;
}
@@ -1128,6 +1166,8 @@ png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
void PNGAPI
png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
{
if (png_ptr == NULL)
return;
if(png_ptr->zbuf)
png_free(png_ptr, png_ptr->zbuf);
png_ptr->zbuf_size = (png_size_t)size;
@@ -1151,8 +1191,13 @@ png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
void PNGAPI
png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
{
#ifdef PNG_MMX_CODE_SUPPORTED
png_uint_32 settable_asm_flags;
png_uint_32 settable_mmx_flags;
#endif
if (png_ptr == NULL)
return;
#ifdef PNG_MMX_CODE_SUPPORTED
settable_mmx_flags =
#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
@@ -1181,23 +1226,26 @@ png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
}
/* we're replacing the settable bits with those passed in by the user,
* so first zero them out of the master copy, then logical-OR in the
* so first zero them out of the master copy, then bitwise-OR in the
* allowed subset that was requested */
png_ptr->asm_flags &= ~settable_asm_flags; /* zero them */
png_ptr->asm_flags |= (asm_flags & settable_asm_flags); /* set them */
#endif /* ?PNG_MMX_CODE_SUPPORTED */
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
/* this function was added to libpng 1.2.0 */
void PNGAPI
png_set_mmx_thresholds (png_structp png_ptr,
png_byte mmx_bitdepth_threshold,
png_uint_32 mmx_rowbytes_threshold)
{
if (png_ptr == NULL)
return;
#ifdef PNG_MMX_CODE_SUPPORTED
png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
#endif /* ?PNG_MMX_CODE_SUPPORTED */
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
@@ -1211,9 +1259,11 @@ png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
* rejected by png_set_IHDR(). To accept any PNG datastream
* regardless of dimensions, set both limits to 0x7ffffffL.
*/
if(png_ptr == NULL) return;
png_ptr->user_width_max = user_width_max;
png_ptr->user_height_max = user_height_max;
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
#endif /* ?PNG_1_0_X */
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

47
png/pngtrans.c
View File

@@ -1,9 +1,9 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
* libpng 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.13 November 13, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2006 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.)
*/
@@ -11,12 +11,14 @@
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* turn on BGR-to-RGB mapping */
void PNGAPI
png_set_bgr(png_structp png_ptr)
{
png_debug(1, "in png_set_bgr\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_BGR;
}
#endif
@@ -27,6 +29,7 @@ void PNGAPI
png_set_swap(png_structp png_ptr)
{
png_debug(1, "in png_set_swap\n");
if(png_ptr == NULL) return;
if (png_ptr->bit_depth == 16)
png_ptr->transformations |= PNG_SWAP_BYTES;
}
@@ -38,6 +41,7 @@ void PNGAPI
png_set_packing(png_structp png_ptr)
{
png_debug(1, "in png_set_packing\n");
if(png_ptr == NULL) return;
if (png_ptr->bit_depth < 8)
{
png_ptr->transformations |= PNG_PACK;
@@ -52,6 +56,7 @@ void PNGAPI
png_set_packswap(png_structp png_ptr)
{
png_debug(1, "in png_set_packswap\n");
if(png_ptr == NULL) return;
if (png_ptr->bit_depth < 8)
png_ptr->transformations |= PNG_PACKSWAP;
}
@@ -62,6 +67,7 @@ void PNGAPI
png_set_shift(png_structp png_ptr, png_color_8p true_bits)
{
png_debug(1, "in png_set_shift\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_SHIFT;
png_ptr->shift = *true_bits;
}
@@ -73,7 +79,7 @@ int PNGAPI
png_set_interlace_handling(png_structp png_ptr)
{
png_debug(1, "in png_set_interlace handling\n");
if (png_ptr->interlaced)
if (png_ptr && png_ptr->interlaced)
{
png_ptr->transformations |= PNG_INTERLACE;
return (7);
@@ -93,6 +99,7 @@ void PNGAPI
png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
{
png_debug(1, "in png_set_filler\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_FILLER;
png_ptr->filler = (png_byte)filler;
if (filler_loc == PNG_FILLER_AFTER)
@@ -125,6 +132,7 @@ void PNGAPI
png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
{
png_debug(1, "in png_set_add_alpha\n");
if(png_ptr == NULL) return;
png_set_filler(png_ptr, filler, filler_loc);
png_ptr->transformations |= PNG_ADD_ALPHA;
}
@@ -138,6 +146,7 @@ void PNGAPI
png_set_swap_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_swap_alpha\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_SWAP_ALPHA;
}
#endif
@@ -148,6 +157,7 @@ void PNGAPI
png_set_invert_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_invert_alpha\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_INVERT_ALPHA;
}
#endif
@@ -157,6 +167,7 @@ void PNGAPI
png_set_invert_mono(png_structp png_ptr)
{
png_debug(1, "in png_set_invert_mono\n");
if(png_ptr == NULL) return;
png_ptr->transformations |= PNG_INVERT_MONO;
}
@@ -241,7 +252,7 @@ png_do_swap(png_row_infop row_info, png_bytep row)
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
static png_byte onebppswaptable[256] = {
static PNG_CONST png_byte onebppswaptable[256] = {
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
@@ -276,7 +287,7 @@ static png_byte onebppswaptable[256] = {
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
};
static png_byte twobppswaptable[256] = {
static PNG_CONST png_byte twobppswaptable[256] = {
0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
@@ -311,7 +322,7 @@ static png_byte twobppswaptable[256] = {
0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
};
static png_byte fourbppswaptable[256] = {
static PNG_CONST png_byte fourbppswaptable[256] = {
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
@@ -362,11 +373,11 @@ png_do_packswap(png_row_infop row_info, png_bytep row)
end = row + row_info->rowbytes;
if (row_info->bit_depth == 1)
table = onebppswaptable;
table = (png_bytep)onebppswaptable;
else if (row_info->bit_depth == 2)
table = twobppswaptable;
table = (png_bytep)twobppswaptable;
else if (row_info->bit_depth == 4)
table = fourbppswaptable;
table = (png_bytep)fourbppswaptable;
else
return;
@@ -392,7 +403,9 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
png_uint_32 row_width=row_info->width;
png_uint_32 i;
if (row_info->color_type == PNG_COLOR_TYPE_RGB &&
if ((row_info->color_type == PNG_COLOR_TYPE_RGB ||
(row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
(flags & PNG_FLAG_STRIP_ALPHA))) &&
row_info->channels == 4)
{
if (row_info->bit_depth == 8)
@@ -471,7 +484,9 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
}
row_info->channels = 3;
}
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY &&
else if ((row_info->color_type == PNG_COLOR_TYPE_GRAY ||
(row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
(flags & PNG_FLAG_STRIP_ALPHA))) &&
row_info->channels == 2)
{
if (row_info->bit_depth == 8)
@@ -525,6 +540,8 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
}
row_info->channels = 1;
}
if (flags & PNG_FLAG_STRIP_ALPHA)
row_info->color_type &= ~PNG_COLOR_MASK_ALPHA;
}
}
#endif
@@ -614,6 +631,7 @@ 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(png_ptr == NULL) return;
#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;
@@ -634,11 +652,10 @@ png_set_user_transform_info(png_structp png_ptr, png_voidp
png_voidp PNGAPI
png_get_user_transform_ptr(png_structp png_ptr)
{
if (png_ptr == NULL) return (NULL);
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
return ((png_voidp)png_ptr->user_transform_ptr);
#else
if(png_ptr)
return (NULL);
return (NULL);
#endif
return (NULL);
}
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

10
png/pngwio.c
View File

@@ -1,9 +1,9 @@
/* pngwio.c - functions for data output
*
* libpng 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.13 November 13, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* 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.)
*
@@ -45,6 +45,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
if(png_ptr == NULL) return;
#if defined(_WIN32_WCE)
if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
@@ -70,6 +71,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
png_FILE_p io_ptr;
if(png_ptr == NULL) return;
/* 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);
@@ -131,6 +133,9 @@ png_default_flush(png_structp png_ptr)
{
#if !defined(_WIN32_WCE)
png_FILE_p io_ptr;
#endif
if(png_ptr == NULL) return;
#if !defined(_WIN32_WCE)
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
if (io_ptr != NULL)
fflush(io_ptr);
@@ -165,6 +170,7 @@ 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)
{
if(png_ptr == NULL) return;
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)

76
png/pngwrite.c
View File

@@ -1,9 +1,9 @@
/* pngwrite.c - general routines to write a PNG file
*
* libpng 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*/
@@ -26,13 +26,15 @@ void PNGAPI
png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_write_info_before_PLTE\n");
if (png_ptr == NULL || info_ptr == NULL)
return;
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
{
png_write_sig(png_ptr); /* write PNG signature */
#if defined(PNG_MNG_FEATURES_SUPPORTED)
if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
{
png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
png_warning(png_ptr,"MNG features are not allowed in a PNG datastream");
png_ptr->mng_features_permitted=0;
}
#endif
@@ -128,13 +130,16 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
png_debug(1, "in png_write_info\n");
if (png_ptr == NULL || info_ptr == NULL)
return;
png_write_info_before_PLTE(png_ptr, info_ptr);
if (info_ptr->valid & PNG_INFO_PLTE)
png_write_PLTE(png_ptr, info_ptr->palette,
(png_uint_32)info_ptr->num_palette);
else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Valid palette required for paletted images\n");
png_error(png_ptr, "Valid palette required for paletted images");
#if defined(PNG_WRITE_tRNS_SUPPORTED)
if (info_ptr->valid & PNG_INFO_tRNS)
@@ -183,7 +188,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->scal_s_width, info_ptr->scal_s_height);
#else
png_warning(png_ptr,
"png_write_sCAL not supported; sCAL chunk not written.\n");
"png_write_sCAL not supported; sCAL chunk not written.");
#endif
#endif
#endif
@@ -222,7 +227,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].lang_key,
info_ptr->text[i].text);
#else
png_warning(png_ptr, "Unable to write international text\n");
png_warning(png_ptr, "Unable to write international text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
@@ -236,7 +241,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
#else
png_warning(png_ptr, "Unable to write compressed text\n");
png_warning(png_ptr, "Unable to write compressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
@@ -249,7 +254,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].text,
0);
#else
png_warning(png_ptr, "Unable to write uncompressed text\n");
png_warning(png_ptr, "Unable to write uncompressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
@@ -290,6 +295,8 @@ void PNGAPI
png_write_end(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_write_end\n");
if (png_ptr == NULL)
return;
if (!(png_ptr->mode & PNG_HAVE_IDAT))
png_error(png_ptr, "No IDATs written into file");
@@ -323,7 +330,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].lang_key,
info_ptr->text[i].text);
#else
png_warning(png_ptr, "Unable to write international text\n");
png_warning(png_ptr, "Unable to write international text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
@@ -336,7 +343,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
#else
png_warning(png_ptr, "Unable to write compressed text\n");
png_warning(png_ptr, "Unable to write compressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
@@ -348,7 +355,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0);
#else
png_warning(png_ptr, "Unable to write uncompressed text\n");
png_warning(png_ptr, "Unable to write uncompressed text");
#endif
/* Mark this chunk as written */
@@ -454,8 +461,10 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
#if !defined(PNG_1_0_X)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
#ifdef PNG_MMX_CODE_SUPPORTED
png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
#endif
#endif
#endif /* PNG_1_0_X */
/* added at libpng-1.2.6 */
@@ -554,6 +563,8 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
}
/* Initialize png_ptr structure, and allocate any memory needed */
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* Deprecated. */
#undef png_write_init
void PNGAPI
png_write_init(png_structp png_ptr)
@@ -567,6 +578,7 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
png_size_t png_struct_size, png_size_t png_info_size)
{
/* We only come here via pre-1.0.12-compiled applications */
if(png_ptr == NULL) return;
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
if(png_sizeof(png_struct) > png_struct_size ||
png_sizeof(png_info) > png_info_size)
@@ -604,6 +616,7 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
}
png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
}
#endif /* PNG_1_0_X || PNG_1_2_X */
void PNGAPI
@@ -614,7 +627,12 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#ifdef PNG_SETJMP_SUPPORTED
jmp_buf tmp_jmp; /* to save current jump buffer */
#endif
int i = 0;
if (png_ptr == NULL)
return;
do
{
if (user_png_ver[i] != png_libpng_ver[i])
@@ -655,8 +673,10 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#if !defined(PNG_1_0_X)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
#ifdef PNG_MMX_CODE_SUPPORTED
png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
#endif
#endif
#endif /* PNG_1_0_X */
#ifdef PNG_SETJMP_SUPPORTED
@@ -691,6 +711,10 @@ png_write_rows(png_structp png_ptr, png_bytepp row,
png_bytepp rp; /* row pointer */
png_debug(1, "in png_write_rows\n");
if (png_ptr == NULL)
return;
/* loop through the rows */
for (i = 0, rp = row; i < num_rows; i++, rp++)
{
@@ -708,6 +732,9 @@ png_write_image(png_structp png_ptr, png_bytepp image)
int pass, num_pass; /* pass variables */
png_bytepp rp; /* points to current row */
if (png_ptr == NULL)
return;
png_debug(1, "in png_write_image\n");
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
/* intialize interlace handling. If image is not interlaced,
@@ -731,8 +758,11 @@ png_write_image(png_structp png_ptr, png_bytepp image)
void PNGAPI
png_write_row(png_structp png_ptr, png_bytep row)
{
if (png_ptr == NULL)
return;
png_debug2(1, "in png_write_row (row %ld, pass %d)\n",
png_ptr->row_number, png_ptr->pass);
/* initialize transformations and other stuff if first time */
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
@@ -906,6 +936,8 @@ void PNGAPI
png_set_flush(png_structp png_ptr, int nrows)
{
png_debug(1, "in png_set_flush\n");
if (png_ptr == NULL)
return;
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
}
@@ -916,6 +948,8 @@ png_write_flush(png_structp png_ptr)
int wrote_IDAT;
png_debug(1, "in png_write_flush\n");
if (png_ptr == NULL)
return;
/* We have already written out all of the data */
if (png_ptr->row_number >= png_ptr->num_rows)
return;
@@ -1092,6 +1126,8 @@ void PNGAPI
png_set_filter(png_structp png_ptr, int method, int filters)
{
png_debug(1, "in png_set_filter\n");
if (png_ptr == NULL)
return;
#if defined(PNG_MNG_FEATURES_SUPPORTED)
if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
(method == PNG_INTRAPIXEL_DIFFERENCING))
@@ -1200,6 +1236,8 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int i;
png_debug(1, "in png_set_filter_heuristics\n");
if (png_ptr == NULL)
return;
if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
{
png_warning(png_ptr, "Unknown filter heuristic method");
@@ -1312,6 +1350,8 @@ void PNGAPI
png_set_compression_level(png_structp png_ptr, int level)
{
png_debug(1, "in png_set_compression_level\n");
if (png_ptr == NULL)
return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
png_ptr->zlib_level = level;
}
@@ -1320,6 +1360,8 @@ void PNGAPI
png_set_compression_mem_level(png_structp png_ptr, int mem_level)
{
png_debug(1, "in png_set_compression_mem_level\n");
if (png_ptr == NULL)
return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
png_ptr->zlib_mem_level = mem_level;
}
@@ -1328,6 +1370,8 @@ void PNGAPI
png_set_compression_strategy(png_structp png_ptr, int strategy)
{
png_debug(1, "in png_set_compression_strategy\n");
if (png_ptr == NULL)
return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
png_ptr->zlib_strategy = strategy;
}
@@ -1335,6 +1379,8 @@ png_set_compression_strategy(png_structp png_ptr, int strategy)
void PNGAPI
png_set_compression_window_bits(png_structp png_ptr, int window_bits)
{
if (png_ptr == NULL)
return;
if (window_bits > 15)
png_warning(png_ptr, "Only compression windows <= 32k supported by PNG");
else if (window_bits < 8)
@@ -1355,6 +1401,8 @@ void PNGAPI
png_set_compression_method(png_structp png_ptr, int method)
{
png_debug(1, "in png_set_compression_method\n");
if (png_ptr == NULL)
return;
if (method != 8)
png_warning(png_ptr, "Only compression method 8 is supported by PNG");
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD;
@@ -1364,6 +1412,8 @@ png_set_compression_method(png_structp png_ptr, int method)
void PNGAPI
png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
{
if (png_ptr == NULL)
return;
png_ptr->write_row_fn = write_row_fn;
}
@@ -1373,6 +1423,8 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
write_user_transform_fn)
{
png_debug(1, "in png_set_write_user_transform_fn\n");
if (png_ptr == NULL)
return;
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->write_user_transform_fn = write_user_transform_fn;
}
@@ -1384,6 +1436,8 @@ void PNGAPI
png_write_png(png_structp png_ptr, png_infop info_ptr,
int transforms, voidp params)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
/* invert the alpha channel from opacity to transparency */
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)

21
png/pngwtran.c
View File

@@ -1,9 +1,9 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.9 April 14, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2006 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.)
*/
@@ -60,14 +60,14 @@ png_do_write_transformations(png_structp png_ptr)
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_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_BGR_SUPPORTED)
if (png_ptr->transformations & PNG_BGR)
png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
@@ -439,9 +439,12 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
/* does nothing
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*/
sp+=3; dp = sp;
*(dp++) = (png_byte)(255 - *(sp++));
}
}
@@ -454,12 +457,15 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
for (i = 0, sp = dp = row; i < row_width; i++)
{
/* does nothing
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*/
sp+=6; dp = sp;
*(dp++) = (png_byte)(255 - *(sp++));
*(dp++) = (png_byte)(255 - *(sp++));
}
@@ -489,8 +495,11 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
for (i = 0, sp = dp = row; i < row_width; i++)
{
/* does nothing
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*/
sp+=2; dp = sp;
*(dp++) = (png_byte)(255 - *(sp++));
*(dp++) = (png_byte)(255 - *(sp++));
}

145
png/pngwutil.c
View File

@@ -1,9 +1,9 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng version 1.2.7 - September 12, 2004
* Last changed in libpng 1.2.15 January 5, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2005 Glenn Randers-Pehrson
* Copyright (c) 1998-2007 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.)
*/
@@ -16,7 +16,7 @@
* with unsigned numbers for convenience, although one supported
* ancillary chunk uses signed (two's complement) numbers.
*/
void /* PRIVATE */
void PNGAPI
png_save_uint_32(png_bytep buf, png_uint_32 i)
{
buf[0] = (png_byte)((i >> 24) & 0xff);
@@ -25,12 +25,11 @@ png_save_uint_32(png_bytep buf, png_uint_32 i)
buf[3] = (png_byte)(i & 0xff);
}
#if defined(PNG_WRITE_pCAL_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
/* The png_save_int_32 function assumes integers are stored in two's
* complement format. If this isn't the case, then this routine needs to
* be modified to write data in two's complement format.
*/
void /* PRIVATE */
void PNGAPI
png_save_int_32(png_bytep buf, png_int_32 i)
{
buf[0] = (png_byte)((i >> 24) & 0xff);
@@ -38,13 +37,12 @@ png_save_int_32(png_bytep buf, png_int_32 i)
buf[2] = (png_byte)((i >> 8) & 0xff);
buf[3] = (png_byte)(i & 0xff);
}
#endif
/* Place a 16-bit number into a buffer in PNG byte order.
* The parameter is declared unsigned int, not png_uint_16,
* just to avoid potential problems on pre-ANSI C compilers.
*/
void /* PRIVATE */
void PNGAPI
png_save_uint_16(png_bytep buf, unsigned int i)
{
buf[0] = (png_byte)((i >> 8) & 0xff);
@@ -64,6 +62,7 @@ void PNGAPI
png_write_chunk(png_structp png_ptr, png_bytep chunk_name,
png_bytep data, png_size_t length)
{
if(png_ptr == NULL) return;
png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
png_write_chunk_data(png_ptr, data, length);
png_write_chunk_end(png_ptr);
@@ -79,6 +78,7 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
{
png_byte buf[4];
png_debug2(0, "Writing %s chunk (%lu bytes)\n", chunk_name, length);
if(png_ptr == NULL) return;
/* write the length */
png_save_uint_32(buf, length);
@@ -100,6 +100,7 @@ void PNGAPI
png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
/* write the data, and run the CRC over it */
if(png_ptr == NULL) return;
if (data != NULL && length > 0)
{
png_calculate_crc(png_ptr, data, length);
@@ -113,6 +114,8 @@ png_write_chunk_end(png_structp png_ptr)
{
png_byte buf[4];
if(png_ptr == NULL) return;
/* write the crc */
png_save_uint_32(buf, png_ptr->crc);
@@ -161,9 +164,11 @@ png_text_compress(png_structp png_ptr,
{
int ret;
comp->num_output_ptr = comp->max_output_ptr = 0;
comp->num_output_ptr = 0;
comp->max_output_ptr = 0;
comp->output_ptr = NULL;
comp->input = NULL;
comp->input_len = 0;
/* we may just want to pass the text right through */
if (compression == PNG_TEXT_COMPRESSION_NONE)
@@ -219,7 +224,7 @@ png_text_compress(png_structp png_ptr,
png_error(png_ptr, "zlib error");
}
/* check to see if we need more room */
if (!png_ptr->zstream.avail_out && png_ptr->zstream.avail_in)
if (!(png_ptr->zstream.avail_out))
{
/* make sure the output array has room */
if (comp->num_output_ptr >= comp->max_output_ptr)
@@ -357,9 +362,9 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
png_write_chunk_data(png_ptr, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
/* reset zlib for another zTXt/iTXt or the image data */
/* reset zlib for another zTXt/iTXt or image data */
deflateReset(&png_ptr->zstream);
png_ptr->zstream.data_type = Z_BINARY;
}
#endif
@@ -523,6 +528,9 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
/* libpng is not interested in zstream.data_type */
/* set it to a predefined value, to avoid its evaluation inside zlib */
png_ptr->zstream.data_type = Z_BINARY;
png_ptr->mode = PNG_HAVE_IHDR;
}
@@ -725,8 +733,16 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
png_size_t name_len;
png_charp new_name;
compression_state comp;
int embedded_profile_len = 0;
png_debug(1, "in png_write_iCCP\n");
comp.num_output_ptr = 0;
comp.max_output_ptr = 0;
comp.output_ptr = NULL;
comp.input = NULL;
comp.input_len = 0;
if (name == NULL || (name_len = png_check_keyword(png_ptr, name,
&new_name)) == 0)
{
@@ -740,6 +756,27 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
if (profile == NULL)
profile_len = 0;
if (profile_len > 3)
embedded_profile_len =
((*( (png_bytep)profile ))<<24) |
((*( (png_bytep)profile+1))<<16) |
((*( (png_bytep)profile+2))<< 8) |
((*( (png_bytep)profile+3)) );
if (profile_len < embedded_profile_len)
{
png_warning(png_ptr,
"Embedded profile length too large in iCCP chunk");
return;
}
if (profile_len > embedded_profile_len)
{
png_warning(png_ptr,
"Truncating profile to actual length in iCCP chunk");
profile_len = embedded_profile_len;
}
if (profile_len)
profile_len = png_text_compress(png_ptr, profile, (png_size_t)profile_len,
PNG_COMPRESSION_TYPE_BASE, &comp);
@@ -927,8 +964,7 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
itemp = (png_uint_32)(white_y * 100000.0 + 0.5);
png_save_uint_32(buf + 4, itemp);
if (red_x < 0 || red_x > 0.8 || red_y < 0 || red_y > 0.8 ||
red_x + red_y > 1.0)
if (red_x < 0 || red_y < 0 || red_x + red_y > 1.0)
{
png_warning(png_ptr, "Invalid cHRM red point specified");
return;
@@ -938,8 +974,7 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
itemp = (png_uint_32)(red_y * 100000.0 + 0.5);
png_save_uint_32(buf + 12, itemp);
if (green_x < 0 || green_x > 0.8 || green_y < 0 || green_y > 0.8 ||
green_x + green_y > 1.0)
if (green_x < 0 || green_y < 0 || green_x + green_y > 1.0)
{
png_warning(png_ptr, "Invalid cHRM green point specified");
return;
@@ -949,8 +984,7 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
itemp = (png_uint_32)(green_y * 100000.0 + 0.5);
png_save_uint_32(buf + 20, itemp);
if (blue_x < 0 || blue_x > 0.8 || blue_y < 0 || blue_y > 0.8 ||
blue_x + blue_y > 1.0)
if (blue_x < 0 || blue_y < 0 || blue_x + blue_y > 1.0)
{
png_warning(png_ptr, "Invalid cHRM blue point specified");
return;
@@ -988,7 +1022,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
png_save_uint_32(buf, (png_uint_32)white_x);
png_save_uint_32(buf + 4, (png_uint_32)white_y);
if (red_x > 80000L || red_y > 80000L || red_x + red_y > 100000L)
if (red_x + red_y > 100000L)
{
png_warning(png_ptr, "Invalid cHRM fixed red point specified");
return;
@@ -996,7 +1030,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
png_save_uint_32(buf + 8, (png_uint_32)red_x);
png_save_uint_32(buf + 12, (png_uint_32)red_y);
if (green_x > 80000L || green_y > 80000L || green_x + green_y > 100000L)
if (green_x + green_y > 100000L)
{
png_warning(png_ptr, "Invalid fixed cHRM green point specified");
return;
@@ -1004,7 +1038,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
png_save_uint_32(buf + 16, (png_uint_32)green_x);
png_save_uint_32(buf + 20, (png_uint_32)green_y);
if (blue_x > 80000L || blue_y > 80000L || blue_x + blue_y > 100000L)
if (blue_x + blue_y > 100000L)
{
png_warning(png_ptr, "Invalid fixed cHRM blue point specified");
return;
@@ -1341,6 +1375,12 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
png_debug(1, "in png_write_zTXt\n");
comp.num_output_ptr = 0;
comp.max_output_ptr = 0;
comp.output_ptr = NULL;
comp.input = NULL;
comp.input_len = 0;
if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0)
{
png_warning(png_ptr, "Empty keyword in zTXt chunk");
@@ -1394,6 +1434,11 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
png_debug(1, "in png_write_iTXt\n");
comp.num_output_ptr = 0;
comp.max_output_ptr = 0;
comp.output_ptr = NULL;
comp.input = NULL;
if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0)
{
png_warning(png_ptr, "Empty keyword in iTXt chunk");
@@ -1554,34 +1599,36 @@ png_write_sCAL(png_structp png_ptr, int unit, double width,double height)
#ifdef PNG_USE_LOCAL_ARRAYS
PNG_sCAL;
#endif
char buf[64];
png_size_t total_len;
char wbuf[32], hbuf[32];
png_byte bunit = unit;
png_debug(1, "in png_write_sCAL\n");
buf[0] = (char)unit;
#if defined(_WIN32_WCE)
/* sprintf() function is not supported on WindowsCE */
{
wchar_t wc_buf[32];
size_t wc_len;
swprintf(wc_buf, TEXT("%12.12e"), width);
WideCharToMultiByte(CP_ACP, 0, wc_buf, -1, wbuf, 32, NULL, NULL);
wc_len = wcslen(wc_buf);
WideCharToMultiByte(CP_ACP, 0, wc_buf, -1, buf + 1, wc_len, NULL, NULL);
total_len = wc_len + 2;
swprintf(wc_buf, TEXT("%12.12e"), height);
WideCharToMultiByte(CP_ACP, 0, wc_buf, -1, hbuf, 32, NULL, NULL);
wc_len = wcslen(wc_buf);
WideCharToMultiByte(CP_ACP, 0, wc_buf, -1, buf + total_len, wc_len,
NULL, NULL);
total_len += wc_len;
}
#else
sprintf(wbuf, "%12.12e", width);
sprintf(hbuf, "%12.12e", height);
sprintf(buf + 1, "%12.12e", width);
total_len = 1 + png_strlen(buf + 1) + 1;
sprintf(buf + total_len, "%12.12e", height);
total_len += png_strlen(buf + total_len);
#endif
total_len = 1 + png_strlen(wbuf)+1 + png_strlen(hbuf);
png_debug1(3, "sCAL total length = %d\n", (int)total_len);
png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
png_write_chunk_data(png_ptr, (png_bytep)&bunit, 1);
png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
png_write_chunk_end(png_ptr);
png_debug1(3, "sCAL total length = %u\n", (unsigned int)total_len);
png_write_chunk(png_ptr, (png_bytep)png_sCAL, (png_bytep)buf, total_len);
}
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
@@ -1592,23 +1639,26 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
#ifdef PNG_USE_LOCAL_ARRAYS
PNG_sCAL;
#endif
png_size_t total_len;
char wbuf[32], hbuf[32];
png_byte bunit = unit;
png_byte buf[64];
png_size_t wlen, hlen, total_len;
png_debug(1, "in png_write_sCAL_s\n");
png_strcpy(wbuf,(const char *)width);
png_strcpy(hbuf,(const char *)height);
total_len = 1 + png_strlen(wbuf)+1 + png_strlen(hbuf);
wlen = png_strlen(width);
hlen = png_strlen(height);
total_len = wlen + hlen + 2;
if (total_len > 64)
{
png_warning(png_ptr, "Can't write sCAL (buffer too small)");
return;
}
png_debug1(3, "sCAL total length = %d\n", total_len);
png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
png_write_chunk_data(png_ptr, (png_bytep)&bunit, 1);
png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
buf[0] = (png_byte)unit;
png_memcpy(buf + 1, width, wlen + 1); /* append the '\0' here */
png_memcpy(buf + wlen + 2, height, hlen); /* do NOT append the '\0' here */
png_write_chunk_end(png_ptr);
png_debug1(3, "sCAL total length = %u\n", (unsigned int)total_len);
png_write_chunk(png_ptr, (png_bytep)png_sCAL, buf, total_len);
}
#endif
#endif
@@ -1871,6 +1921,7 @@ png_write_finish_row(png_structp png_ptr)
}
deflateReset(&png_ptr->zstream);
png_ptr->zstream.data_type = Z_BINARY;
}
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
@@ -2048,7 +2099,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
* been specified by the application, and then writes the row out with the
* chosen filter.
*/
#define PNG_MAXSUM (~((png_uint_32)0) >> 1)
#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1)
#define PNG_HISHIFT 10
#define PNG_LOMASK ((png_uint_32)0xffffL)
#define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT))

2
zlib/ChangeLog
View File

@@ -466,7 +466,7 @@ Changes in 1.0.6 (19 Jan 1998)
- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
- added makelcc.bat for lcc-win32 (Tom St Denis)
- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
- Avoid expanded $Id: ChangeLog,v 1.1.2.2 2004/09/08 16:04:42 easysw Exp $. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
- Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
- check for unistd.h in configure (for off_t)
- remove useless check parameter in inflate_blocks_free
- avoid useless assignment of s->check to itself in inflate_blocks_new

111
zlib/adler32.c
View File

@@ -1,5 +1,5 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2004 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -12,12 +12,13 @@
#define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
#define DO1(buf,i) {adler += (buf)[i]; sum2 += adler;}
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
#define DO16(buf) DO8(buf,0); DO8(buf,8);
/* use NO_DIVIDE if your processor does not do division in hardware */
#ifdef NO_DIVIDE
# define MOD(a) \
do { \
@@ -39,8 +40,17 @@
if (a >= (BASE << 1)) a -= (BASE << 1); \
if (a >= BASE) a -= BASE; \
} while (0)
# define MOD4(a) \
do { \
if (a >= (BASE << 4)) a -= (BASE << 4); \
if (a >= (BASE << 3)) a -= (BASE << 3); \
if (a >= (BASE << 2)) a -= (BASE << 2); \
if (a >= (BASE << 1)) a -= (BASE << 1); \
if (a >= BASE) a -= BASE; \
} while (0)
#else
# define MOD(a) a %= BASE
# define MOD4(a) a %= BASE
#endif
/* ========================================================================= */
@@ -49,26 +59,91 @@ uLong ZEXPORT adler32(adler, buf, len)
const Bytef *buf;
uInt len;
{
unsigned long s1 = adler & 0xffff;
unsigned long s2 = (adler >> 16) & 0xffff;
int k;
unsigned long sum2;
unsigned n;
if (buf == Z_NULL) return 1L;
/* split Adler-32 into component sums */
sum2 = (adler >> 16) & 0xffff;
adler &= 0xffff;
while (len > 0) {
k = len < NMAX ? (int)len : NMAX;
len -= k;
while (k >= 16) {
/* in case user likes doing a byte at a time, keep it fast */
if (len == 1) {
adler += buf[0];
if (adler >= BASE)
adler -= BASE;
sum2 += adler;
if (sum2 >= BASE)
sum2 -= BASE;
return adler | (sum2 << 16);
}
/* initial Adler-32 value (deferred check for len == 1 speed) */
if (buf == Z_NULL)
return 1L;
/* in case short lengths are provided, keep it somewhat fast */
if (len < 16) {
while (len--) {
adler += *buf++;
sum2 += adler;
}
if (adler >= BASE)
adler -= BASE;
MOD4(sum2); /* only added so many BASE's */
return adler | (sum2 << 16);
}
/* do length NMAX blocks -- requires just one modulo operation */
while (len >= NMAX) {
len -= NMAX;
n = NMAX / 16; /* NMAX is divisible by 16 */
do {
DO16(buf); /* 16 sums unrolled */
buf += 16;
} while (--n);
MOD(adler);
MOD(sum2);
}
/* do remaining bytes (less than NMAX, still just one modulo) */
if (len) { /* avoid modulos if none remaining */
while (len >= 16) {
len -= 16;
DO16(buf);
buf += 16;
k -= 16;
}
if (k != 0) do {
s1 += *buf++;
s2 += s1;
} while (--k);
MOD(s1);
MOD(s2);
while (len--) {
adler += *buf++;
sum2 += adler;
}
return (s2 << 16) | s1;
MOD(adler);
MOD(sum2);
}
/* return recombined sums */
return adler | (sum2 << 16);
}
/* ========================================================================= */
uLong ZEXPORT adler32_combine(adler1, adler2, len2)
uLong adler1;
uLong adler2;
z_off_t len2;
{
unsigned long sum1;
unsigned long sum2;
unsigned rem;
/* the derivation of this formula is left as an exercise for the reader */
rem = (unsigned)(len2 % BASE);
sum1 = adler1 & 0xffff;
sum2 = rem * sum1;
MOD(sum2);
sum1 += (adler2 & 0xffff) + BASE - 1;
sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
if (sum1 > BASE) sum1 -= BASE;
if (sum1 > BASE) sum1 -= BASE;
if (sum2 > (BASE << 1)) sum2 -= (BASE << 1);
if (sum2 > BASE) sum2 -= BASE;
return sum1 | (sum2 << 16);
}

2
zlib/compress.c
View File

@@ -1,5 +1,5 @@
/* compress.c -- compress a memory buffer
* Copyright (C) 1995-2002 Jean-loup Gailly.
* Copyright (C) 1995-2003 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/

132
zlib/crc32.c
View File

@@ -1,16 +1,24 @@
/* crc32.c -- compute the CRC-32 of a data stream
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2005 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*
* Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
* CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
* tables for updating the shift register in one step with three exclusive-ors
* instead of four steps with four exclusive-ors. This results about a factor
* of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
* instead of four steps with four exclusive-ors. This results in about a
* factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
*/
/* @(#) $Id$ */
/*
Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
protection on the static variables used to control the first-use generation
of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
first call get_crc_table() to initialize the tables before allowing more than
one thread to use crc32().
*/
#ifdef MAKECRCH
# include <stdio.h>
# ifndef DYNAMIC_CRC_TABLE
@@ -56,15 +64,19 @@
# define TBLS 1
#endif /* BYFOUR */
/* Local functions for crc concatenation */
local unsigned long gf2_matrix_times OF((unsigned long *mat,
unsigned long vec));
local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
#ifdef DYNAMIC_CRC_TABLE
local int crc_table_empty = 1;
local volatile int crc_table_empty = 1;
local unsigned long FAR crc_table[TBLS][256];
local void make_crc_table OF((void));
#ifdef MAKECRCH
local void write_table OF((FILE *, const unsigned long FAR *));
#endif /* MAKECRCH */
/*
Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
@@ -97,8 +109,15 @@ local void make_crc_table()
int n, k;
unsigned long poly; /* polynomial exclusive-or pattern */
/* terms of polynomial defining this crc (except x^32): */
static volatile int first = 1; /* flag to limit concurrent making */
static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
/* See if another task is already doing this (not thread-safe, but better
than nothing -- significantly reduces duration of vulnerability in
case the advice about DYNAMIC_CRC_TABLE is ignored) */
if (first) {
first = 0;
/* make exclusive-or pattern from polynomial (0xedb88320UL) */
poly = 0UL;
for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
@@ -113,8 +132,8 @@ local void make_crc_table()
}
#ifdef BYFOUR
/* generate crc for each value followed by one, two, and three zeros, and
then the byte reversal of those as well as the first table */
/* generate crc for each value followed by one, two, and three zeros,
and then the byte reversal of those as well as the first table */
for (n = 0; n < 256; n++) {
c = crc_table[0][n];
crc_table[4][n] = REV(c);
@@ -127,6 +146,12 @@ local void make_crc_table()
#endif /* BYFOUR */
crc_table_empty = 0;
}
else { /* not first */
/* wait for the other guy to finish (not efficient, but rare) */
while (crc_table_empty)
;
}
#ifdef MAKECRCH
/* write out CRC tables to crc32.h */
@@ -180,7 +205,8 @@ local void write_table(out, table)
const unsigned long FAR * ZEXPORT get_crc_table()
{
#ifdef DYNAMIC_CRC_TABLE
if (crc_table_empty) make_crc_table();
if (crc_table_empty)
make_crc_table();
#endif /* DYNAMIC_CRC_TABLE */
return (const unsigned long FAR *)crc_table;
}
@@ -248,7 +274,7 @@ local unsigned long crc32_little(crc, buf, len)
len--;
}
buf4 = (const u4 FAR *)buf;
buf4 = (const u4 FAR *)(const void FAR *)buf;
while (len >= 32) {
DOLIT32;
len -= 32;
@@ -288,7 +314,7 @@ local unsigned long crc32_big(crc, buf, len)
len--;
}
buf4 = (const u4 FAR *)buf;
buf4 = (const u4 FAR *)(const void FAR *)buf;
buf4--;
while (len >= 32) {
DOBIG32;
@@ -309,3 +335,89 @@ local unsigned long crc32_big(crc, buf, len)
}
#endif /* BYFOUR */
#define GF2_DIM 32 /* dimension of GF(2) vectors (length of CRC) */
/* ========================================================================= */
local unsigned long gf2_matrix_times(mat, vec)
unsigned long *mat;
unsigned long vec;
{
unsigned long sum;
sum = 0;
while (vec) {
if (vec & 1)
sum ^= *mat;
vec >>= 1;
mat++;
}
return sum;
}
/* ========================================================================= */
local void gf2_matrix_square(square, mat)
unsigned long *square;
unsigned long *mat;
{
int n;
for (n = 0; n < GF2_DIM; n++)
square[n] = gf2_matrix_times(mat, mat[n]);
}
/* ========================================================================= */
uLong ZEXPORT crc32_combine(crc1, crc2, len2)
uLong crc1;
uLong crc2;
z_off_t len2;
{
int n;
unsigned long row;
unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */
unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */
/* degenerate case */
if (len2 == 0)
return crc1;
/* put operator for one zero bit in odd */
odd[0] = 0xedb88320L; /* CRC-32 polynomial */
row = 1;
for (n = 1; n < GF2_DIM; n++) {
odd[n] = row;
row <<= 1;
}
/* put operator for two zero bits in even */
gf2_matrix_square(even, odd);
/* put operator for four zero bits in odd */
gf2_matrix_square(odd, even);
/* apply len2 zeros to crc1 (first square will put the operator for one
zero byte, eight zero bits, in even) */
do {
/* apply zeros operator for this bit of len2 */
gf2_matrix_square(even, odd);
if (len2 & 1)
crc1 = gf2_matrix_times(even, crc1);
len2 >>= 1;
/* if no more bits set, then done */
if (len2 == 0)
break;
/* another iteration of the loop with odd and even swapped */
gf2_matrix_square(odd, even);
if (len2 & 1)
crc1 = gf2_matrix_times(odd, crc1);
len2 >>= 1;
/* if no more bits set, then done */
} while (len2 != 0);
/* return combined crc */
crc1 ^= crc2;
return crc1;
}

264
zlib/deflate.c
View File

@@ -1,5 +1,5 @@
/* deflate.c -- compress data using the deflation algorithm
* Copyright (C) 1995-2003 Jean-loup Gailly.
* Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -52,7 +52,7 @@
#include "deflate.h"
const char deflate_copyright[] =
" deflate 1.2.1 Copyright 1995-2003 Jean-loup Gailly ";
" deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@@ -264,7 +264,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
#endif
if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
strategy < 0 || strategy > Z_RLE) {
strategy < 0 || strategy > Z_FIXED) {
return Z_STREAM_ERROR;
}
if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */
@@ -274,6 +274,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
s->strm = strm;
s->wrap = wrap;
s->gzhead = Z_NULL;
s->w_bits = windowBits;
s->w_size = 1 << s->w_bits;
s->w_mask = s->w_size - 1;
@@ -333,9 +334,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
if (length < MIN_MATCH) return Z_OK;
if (length > MAX_DIST(s)) {
length = MAX_DIST(s);
#ifndef USE_DICT_HEAD
dictionary += dictLength - length; /* use the tail of the dictionary */
#endif
}
zmemcpy(s->window, dictionary, length);
s->strstart = length;
@@ -390,6 +389,17 @@ int ZEXPORT deflateReset (strm)
return Z_OK;
}
/* ========================================================================= */
int ZEXPORT deflateSetHeader (strm, head)
z_streamp strm;
gz_headerp head;
{
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
if (strm->state->wrap != 2) return Z_STREAM_ERROR;
strm->state->gzhead = head;
return Z_OK;
}
/* ========================================================================= */
int ZEXPORT deflatePrime (strm, bits, value)
z_streamp strm;
@@ -420,7 +430,7 @@ int ZEXPORT deflateParams(strm, level, strategy)
#else
if (level == Z_DEFAULT_COMPRESSION) level = 6;
#endif
if (level < 0 || level > 9 || strategy < 0 || strategy > Z_RLE) {
if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {
return Z_STREAM_ERROR;
}
func = configuration_table[s->level].func;
@@ -440,6 +450,25 @@ int ZEXPORT deflateParams(strm, level, strategy)
return err;
}
/* ========================================================================= */
int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
z_streamp strm;
int good_length;
int max_lazy;
int nice_length;
int max_chain;
{
deflate_state *s;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
s = strm->state;
s->good_match = good_length;
s->max_lazy_match = max_lazy;
s->nice_match = nice_length;
s->max_chain_length = max_chain;
return Z_OK;
}
/* =========================================================================
* For the default windowBits of 15 and memLevel of 8, this function returns
* a close to exact, as well as small, upper bound on the compressed size.
@@ -548,9 +577,11 @@ int ZEXPORT deflate (strm, flush)
if (s->status == INIT_STATE) {
#ifdef GZIP
if (s->wrap == 2) {
strm->adler = crc32(0L, Z_NULL, 0);
put_byte(s, 31);
put_byte(s, 139);
put_byte(s, 8);
if (s->gzhead == NULL) {
put_byte(s, 0);
put_byte(s, 0);
put_byte(s, 0);
@@ -559,9 +590,34 @@ int ZEXPORT deflate (strm, flush)
put_byte(s, s->level == 9 ? 2 :
(s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
4 : 0));
put_byte(s, 255);
put_byte(s, OS_CODE);
s->status = BUSY_STATE;
strm->adler = crc32(0L, Z_NULL, 0);
}
else {
put_byte(s, (s->gzhead->text ? 1 : 0) +
(s->gzhead->hcrc ? 2 : 0) +
(s->gzhead->extra == Z_NULL ? 0 : 4) +
(s->gzhead->name == Z_NULL ? 0 : 8) +
(s->gzhead->comment == Z_NULL ? 0 : 16)
);
put_byte(s, (Byte)(s->gzhead->time & 0xff));
put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));
put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));
put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));
put_byte(s, s->level == 9 ? 2 :
(s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
4 : 0));
put_byte(s, s->gzhead->os & 0xff);
if (s->gzhead->extra != NULL) {
put_byte(s, s->gzhead->extra_len & 0xff);
put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
}
if (s->gzhead->hcrc)
strm->adler = crc32(strm->adler, s->pending_buf,
s->pending);
s->gzindex = 0;
s->status = EXTRA_STATE;
}
}
else
#endif
@@ -592,6 +648,110 @@ int ZEXPORT deflate (strm, flush)
strm->adler = adler32(0L, Z_NULL, 0);
}
}
#ifdef GZIP
if (s->status == EXTRA_STATE) {
if (s->gzhead->extra != NULL) {
uInt beg = s->pending; /* start of bytes to update crc */
while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
if (s->pending == s->pending_buf_size) {
if (s->gzhead->hcrc && s->pending > beg)
strm->adler = crc32(strm->adler, s->pending_buf + beg,
s->pending - beg);
flush_pending(strm);
beg = s->pending;
if (s->pending == s->pending_buf_size)
break;
}
put_byte(s, s->gzhead->extra[s->gzindex]);
s->gzindex++;
}
if (s->gzhead->hcrc && s->pending > beg)
strm->adler = crc32(strm->adler, s->pending_buf + beg,
s->pending - beg);
if (s->gzindex == s->gzhead->extra_len) {
s->gzindex = 0;
s->status = NAME_STATE;
}
}
else
s->status = NAME_STATE;
}
if (s->status == NAME_STATE) {
if (s->gzhead->name != NULL) {
uInt beg = s->pending; /* start of bytes to update crc */
int val;
do {
if (s->pending == s->pending_buf_size) {
if (s->gzhead->hcrc && s->pending > beg)
strm->adler = crc32(strm->adler, s->pending_buf + beg,
s->pending - beg);
flush_pending(strm);
beg = s->pending;
if (s->pending == s->pending_buf_size) {
val = 1;
break;
}
}
val = s->gzhead->name[s->gzindex++];
put_byte(s, val);
} while (val != 0);
if (s->gzhead->hcrc && s->pending > beg)
strm->adler = crc32(strm->adler, s->pending_buf + beg,
s->pending - beg);
if (val == 0) {
s->gzindex = 0;
s->status = COMMENT_STATE;
}
}
else
s->status = COMMENT_STATE;
}
if (s->status == COMMENT_STATE) {
if (s->gzhead->comment != NULL) {
uInt beg = s->pending; /* start of bytes to update crc */
int val;
do {
if (s->pending == s->pending_buf_size) {
if (s->gzhead->hcrc && s->pending > beg)
strm->adler = crc32(strm->adler, s->pending_buf + beg,
s->pending - beg);
flush_pending(strm);
beg = s->pending;
if (s->pending == s->pending_buf_size) {
val = 1;
break;
}
}
val = s->gzhead->comment[s->gzindex++];
put_byte(s, val);
} while (val != 0);
if (s->gzhead->hcrc && s->pending > beg)
strm->adler = crc32(strm->adler, s->pending_buf + beg,
s->pending - beg);
if (val == 0)
s->status = HCRC_STATE;
}
else
s->status = HCRC_STATE;
}
if (s->status == HCRC_STATE) {
if (s->gzhead->hcrc) {
if (s->pending + 2 > s->pending_buf_size)
flush_pending(strm);
if (s->pending + 2 <= s->pending_buf_size) {
put_byte(s, (Byte)(strm->adler & 0xff));
put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
strm->adler = crc32(0L, Z_NULL, 0);
s->status = BUSY_STATE;
}
}
else
s->status = BUSY_STATE;
}
#endif
/* Flush as much pending output as possible */
if (s->pending != 0) {
@@ -704,7 +864,12 @@ int ZEXPORT deflateEnd (strm)
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
status = strm->state->status;
if (status != INIT_STATE && status != BUSY_STATE &&
if (status != INIT_STATE &&
status != EXTRA_STATE &&
status != NAME_STATE &&
status != COMMENT_STATE &&
status != HCRC_STATE &&
status != BUSY_STATE &&
status != FINISH_STATE) {
return Z_STREAM_ERROR;
}
@@ -744,12 +909,12 @@ int ZEXPORT deflateCopy (dest, source)
ss = source->state;
*dest = *source;
zmemcpy(dest, source, sizeof(z_stream));
ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
if (ds == Z_NULL) return Z_MEM_ERROR;
dest->state = (struct internal_state FAR *) ds;
*ds = *ss;
zmemcpy(ds, ss, sizeof(deflate_state));
ds->strm = dest;
ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
@@ -838,9 +1003,11 @@ local void lm_init (s)
s->match_length = s->prev_length = MIN_MATCH-1;
s->match_available = 0;
s->ins_h = 0;
#ifndef FASTEST
#ifdef ASMV
match_init(); /* initialize the asm code */
#endif
#endif
}
#ifndef FASTEST
@@ -909,7 +1076,12 @@ local uInt longest_match(s, cur_match)
match = s->window + cur_match;
/* Skip to next match if the match length cannot increase
* or if the match length is less than 2:
* or if the match length is less than 2. Note that the checks below
* for insufficient lookahead only occur occasionally for performance
* reasons. Therefore uninitialized memory will be accessed, and
* conditional jumps will be made that depend on those values.
* However the length of the match is limited to the lookahead, so
* the output of deflate is not affected by the uninitialized values.
*/
#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
/* This code assumes sizeof(unsigned short) == 2. Do not use
@@ -1131,6 +1303,7 @@ local void fill_window(s)
later. (Using level 0 permanently is not an optimal usage of
zlib, so we don't care about this pathological case.)
*/
/* %%% avoid this when Z_RLE */
n = s->hash_size;
p = &s->head[n];
do {
@@ -1309,12 +1482,12 @@ local block_state deflate_fast(s, flush)
* of the string with itself at the start of the input file).
*/
#ifdef FASTEST
if ((s->strategy < Z_HUFFMAN_ONLY) ||
if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) ||
(s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
s->match_length = longest_match_fast (s, hash_head);
}
#else
if (s->strategy < Z_HUFFMAN_ONLY) {
if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
s->match_length = longest_match (s, hash_head);
} else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
s->match_length = longest_match_fast (s, hash_head);
@@ -1418,7 +1591,7 @@ local block_state deflate_slow(s, flush)
* of window index 0 (in particular we have to avoid a match
* of the string with itself at the start of the input file).
*/
if (s->strategy < Z_HUFFMAN_ONLY) {
if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
s->match_length = longest_match (s, hash_head);
} else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
s->match_length = longest_match_fast (s, hash_head);
@@ -1500,3 +1673,64 @@ local block_state deflate_slow(s, flush)
return flush == Z_FINISH ? finish_done : block_done;
}
#endif /* FASTEST */
#if 0
/* ===========================================================================
* For Z_RLE, simply look for runs of bytes, generate matches only of distance
* one. Do not maintain a hash table. (It will be regenerated if this run of
* deflate switches away from Z_RLE.)
*/
local block_state deflate_rle(s, flush)
deflate_state *s;
int flush;
{
int bflush; /* set if current block must be flushed */
uInt run; /* length of run */
uInt max; /* maximum length of run */
uInt prev; /* byte at distance one to match */
Bytef *scan; /* scan for end of run */
for (;;) {
/* Make sure that we always have enough lookahead, except
* at the end of the input file. We need MAX_MATCH bytes
* for the longest encodable run.
*/
if (s->lookahead < MAX_MATCH) {
fill_window(s);
if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) {
return need_more;
}
if (s->lookahead == 0) break; /* flush the current block */
}
/* See how many times the previous byte repeats */
run = 0;
if (s->strstart > 0) { /* if there is a previous byte, that is */
max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH;
scan = s->window + s->strstart - 1;
prev = *scan++;
do {
if (*scan++ != prev)
break;
} while (++run < max);
}
/* Emit match if have run of MIN_MATCH or longer, else emit literal */
if (run >= MIN_MATCH) {
check_match(s, s->strstart, s->strstart - 1, run);
_tr_tally_dist(s, 1, run - MIN_MATCH, bflush);
s->lookahead -= run;
s->strstart += run;
} else {
/* No match, output a literal byte */
Tracevv((stderr,"%c", s->window[s->strstart]));
_tr_tally_lit (s, s->window[s->strstart], bflush);
s->lookahead--;
s->strstart++;
}
if (bflush) FLUSH_BLOCK(s, 0);
}
FLUSH_BLOCK(s, flush == Z_FINISH);
return flush == Z_FINISH ? finish_done : block_done;
}
#endif

11
zlib/deflate.h
View File

@@ -1,5 +1,5 @@
/* deflate.h -- internal compression state
* Copyright (C) 1995-2002 Jean-loup Gailly
* Copyright (C) 1995-2004 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -49,6 +49,10 @@
/* All codes must not exceed MAX_BITS bits */
#define INIT_STATE 42
#define EXTRA_STATE 69
#define NAME_STATE 73
#define COMMENT_STATE 91
#define HCRC_STATE 103
#define BUSY_STATE 113
#define FINISH_STATE 666
/* Stream status */
@@ -93,9 +97,10 @@ typedef struct internal_state {
Bytef *pending_buf; /* output still pending */
ulg pending_buf_size; /* size of pending_buf */
Bytef *pending_out; /* next pending byte to output to the stream */
int pending; /* nb of bytes in the pending buffer */
uInt pending; /* nb of bytes in the pending buffer */
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
Byte data_type; /* UNKNOWN, BINARY or ASCII */
gz_headerp gzhead; /* gzip header information to write */
uInt gzindex; /* where in extra, name, or comment */
Byte method; /* STORED (for zip only) or DEFLATED */
int last_flush; /* value of flush param for previous deflate call */

47
zlib/gzio.c
View File

@@ -1,5 +1,5 @@
/* gzio.c -- IO on .gz files
* Copyright (C) 1995-2003 Jean-loup Gailly.
* Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*
* Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
@@ -11,7 +11,7 @@
#include "zutil.h"
#ifdef NO_DEFLATE /* for compatiblity with old definition */
#ifdef NO_DEFLATE /* for compatibility with old definition */
# define NO_GZCOMPRESS
#endif
@@ -220,7 +220,7 @@ gzFile ZEXPORT gzdopen (fd, mode)
int fd;
const char *mode;
{
char name[20];
char name[46]; /* allow for up to 128-bit integers */
if (fd < 0) return (gzFile)Z_NULL;
sprintf(name, "<fd:%d>", fd); /* for debugging */
@@ -264,7 +264,7 @@ local int get_byte(s)
if (s->z_eof) return EOF;
if (s->stream.avail_in == 0) {
errno = 0;
s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
if (s->stream.avail_in == 0) {
s->z_eof = 1;
if (ferror(s->file)) s->z_err = Z_ERRNO;
@@ -300,7 +300,7 @@ local void check_header(s)
if (len < 2) {
if (len) s->inbuf[0] = s->stream.next_in[0];
errno = 0;
len = fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
s->stream.avail_in += len;
s->stream.next_in = s->inbuf;
@@ -415,6 +415,7 @@ int ZEXPORT gzread (file, buf, len)
s->stream.avail_out--;
s->back = EOF;
s->out++;
start++;
if (s->last) {
s->z_err = Z_STREAM_END;
return 1;
@@ -436,8 +437,8 @@ int ZEXPORT gzread (file, buf, len)
s->stream.avail_in -= n;
}
if (s->stream.avail_out > 0) {
s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
s->file);
s->stream.avail_out -=
(uInt)fread(next_out, 1, s->stream.avail_out, s->file);
}
len -= s->stream.avail_out;
s->in += len;
@@ -448,7 +449,7 @@ int ZEXPORT gzread (file, buf, len)
if (s->stream.avail_in == 0 && !s->z_eof) {
errno = 0;
s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
if (s->stream.avail_in == 0) {
s->z_eof = 1;
if (ferror(s->file)) {
@@ -488,6 +489,9 @@ int ZEXPORT gzread (file, buf, len)
}
s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
if (len == s->stream.avail_out &&
(s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO))
return -1;
return (int)(len - s->stream.avail_out);
}
@@ -898,6 +902,18 @@ int ZEXPORT gzeof (file)
return s->z_err == Z_STREAM_END;
}
/* ===========================================================================
Returns 1 if reading and doing so transparently, otherwise zero.
*/
int ZEXPORT gzdirect (file)
gzFile file;
{
gz_stream *s = (gz_stream*)file;
if (s == NULL || s->mode != 'r') return 0;
return s->transparent;
}
/* ===========================================================================
Outputs a long in LSB order to the given file
*/
@@ -937,7 +953,6 @@ local uLong getLong (s)
int ZEXPORT gzclose (file)
gzFile file;
{
int err;
gz_stream *s = (gz_stream*)file;
if (s == NULL) return Z_STREAM_ERROR;
@@ -946,8 +961,8 @@ int ZEXPORT gzclose (file)
#ifdef NO_GZCOMPRESS
return Z_STREAM_ERROR;
#else
err = do_flush (file, Z_FINISH);
if (err != Z_OK) return destroy((gz_stream*)file);
if (do_flush (file, Z_FINISH) != Z_OK)
return destroy((gz_stream*)file);
putLong (s->file, s->crc);
putLong (s->file, (uLong)(s->in & 0xffffffff));
@@ -956,10 +971,16 @@ int ZEXPORT gzclose (file)
return destroy((gz_stream*)file);
}
#ifdef STDC
# define zstrerror(errnum) strerror(errnum)
#else
# define zstrerror(errnum) ""
#endif
/* ===========================================================================
Returns the error message for the last error which occured on the
Returns the error message for the last error which occurred on the
given compressed file. errnum is set to zlib error number. If an
error occured in the file system and not in the compression library,
error occurred in the file system and not in the compression library,
errnum is set to Z_ERRNO and the application may consult errno
to get the exact error code.
*/

17
zlib/inffast.c
View File

@@ -1,5 +1,5 @@
/* inffast.c -- fast decoding
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2004 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -19,7 +19,7 @@
- none
No measurable difference:
- Pentium III (Anderson)
- 68060 (Nikl)
- M68060 (Nikl)
*/
#ifdef POSTINC
# define OFF 0
@@ -74,6 +74,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
unsigned char FAR *out; /* local strm->next_out */
unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
unsigned char FAR *end; /* while out < end, enough space available */
#ifdef INFLATE_STRICT
unsigned dmax; /* maximum distance from zlib header */
#endif
unsigned wsize; /* window size or zero if not using window */
unsigned whave; /* valid bytes in the window */
unsigned write; /* window write index */
@@ -98,6 +101,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
out = strm->next_out - OFF;
beg = out - (start - strm->avail_out);
end = out + (strm->avail_out - 257);
#ifdef INFLATE_STRICT
dmax = state->dmax;
#endif
wsize = state->wsize;
whave = state->whave;
write = state->write;
@@ -167,6 +173,13 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
}
}
dist += (unsigned)hold & ((1U << op) - 1);
#ifdef INFLATE_STRICT
if (dist > dmax) {
strm->msg = (char *)"invalid distance too far back";
state->mode = BAD;
break;
}
#endif
hold >>= op;
bits -= op;
Tracevv((stderr, "inflate: distance %u\n", dist));

122
zlib/inflate.c
View File

@@ -1,5 +1,5 @@
/* inflate.c -- zlib decompression
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2005 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -109,11 +109,15 @@ z_streamp strm;
state = (struct inflate_state FAR *)strm->state;
strm->total_in = strm->total_out = state->total = 0;
strm->msg = Z_NULL;
strm->adler = 1; /* to support ill-conceived Java test suite */
state->mode = HEAD;
state->last = 0;
state->havedict = 0;
state->dmax = 32768U;
state->head = Z_NULL;
state->wsize = 0;
state->whave = 0;
state->write = 0;
state->hold = 0;
state->bits = 0;
state->lencode = state->distcode = state->next = state->codes;
@@ -121,6 +125,22 @@ z_streamp strm;
return Z_OK;
}
int ZEXPORT inflatePrime(strm, bits, value)
z_streamp strm;
int bits;
int value;
{
struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
value &= (1L << bits) - 1;
state->hold += value << state->bits;
state->bits += bits;
return Z_OK;
}
int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
z_streamp strm;
int windowBits;
@@ -143,7 +163,7 @@ int stream_size;
ZALLOC(strm, 1, sizeof(struct inflate_state));
if (state == Z_NULL) return Z_MEM_ERROR;
Tracev((stderr, "inflate: allocated\n"));
strm->state = (voidpf)state;
strm->state = (struct internal_state FAR *)state;
if (windowBits < 0) {
state->wrap = 0;
windowBits = -windowBits;
@@ -581,6 +601,8 @@ int flush;
break;
}
state->flags = 0; /* expect zlib header */
if (state->head != Z_NULL)
state->head->done = -1;
if (!(state->wrap & 1) || /* check if zlib header allowed */
#else
if (
@@ -596,11 +618,13 @@ int flush;
break;
}
DROPBITS(4);
if (BITS(4) + 8 > state->wbits) {
len = BITS(4) + 8;
if (len > state->wbits) {
strm->msg = (char *)"invalid window size";
state->mode = BAD;
break;
}
state->dmax = 1U << len;
Tracev((stderr, "inflate: zlib header ok\n"));
strm->adler = state->check = adler32(0L, Z_NULL, 0);
state->mode = hold & 0x200 ? DICTID : TYPE;
@@ -620,16 +644,24 @@ int flush;
state->mode = BAD;
break;
}
if (state->head != Z_NULL)
state->head->text = (int)((hold >> 8) & 1);
if (state->flags & 0x0200) CRC2(state->check, hold);
INITBITS();
state->mode = TIME;
case TIME:
NEEDBITS(32);
if (state->head != Z_NULL)
state->head->time = hold;
if (state->flags & 0x0200) CRC4(state->check, hold);
INITBITS();
state->mode = OS;
case OS:
NEEDBITS(16);
if (state->head != Z_NULL) {
state->head->xflags = (int)(hold & 0xff);
state->head->os = (int)(hold >> 8);
}
if (state->flags & 0x0200) CRC2(state->check, hold);
INITBITS();
state->mode = EXLEN;
@@ -637,15 +669,26 @@ int flush;
if (state->flags & 0x0400) {
NEEDBITS(16);
state->length = (unsigned)(hold);
if (state->head != Z_NULL)
state->head->extra_len = (unsigned)hold;
if (state->flags & 0x0200) CRC2(state->check, hold);
INITBITS();
}
else if (state->head != Z_NULL)
state->head->extra = Z_NULL;
state->mode = EXTRA;
case EXTRA:
if (state->flags & 0x0400) {
copy = state->length;
if (copy > have) copy = have;
if (copy) {
if (state->head != Z_NULL &&
state->head->extra != Z_NULL) {
len = state->head->extra_len - state->length;
zmemcpy(state->head->extra + len, next,
len + copy > state->head->extra_max ?
state->head->extra_max - len : copy);
}
if (state->flags & 0x0200)
state->check = crc32(state->check, next, copy);
have -= copy;
@@ -654,6 +697,7 @@ int flush;
}
if (state->length) goto inf_leave;
}
state->length = 0;
state->mode = NAME;
case NAME:
if (state->flags & 0x0800) {
@@ -661,13 +705,20 @@ int flush;
copy = 0;
do {
len = (unsigned)(next[copy++]);
if (state->head != Z_NULL &&
state->head->name != Z_NULL &&
state->length < state->head->name_max)
state->head->name[state->length++] = len;
} while (len && copy < have);
if (state->flags & 0x02000)
if (state->flags & 0x0200)
state->check = crc32(state->check, next, copy);
have -= copy;
next += copy;
if (len) goto inf_leave;
}
else if (state->head != Z_NULL)
state->head->name = Z_NULL;
state->length = 0;
state->mode = COMMENT;
case COMMENT:
if (state->flags & 0x1000) {
@@ -675,13 +726,19 @@ int flush;
copy = 0;
do {
len = (unsigned)(next[copy++]);
if (state->head != Z_NULL &&
state->head->comment != Z_NULL &&
state->length < state->head->comm_max)
state->head->comment[state->length++] = len;
} while (len && copy < have);
if (state->flags & 0x02000)
if (state->flags & 0x0200)
state->check = crc32(state->check, next, copy);
have -= copy;
next += copy;
if (len) goto inf_leave;
}
else if (state->head != Z_NULL)
state->head->comment = Z_NULL;
state->mode = HCRC;
case HCRC:
if (state->flags & 0x0200) {
@@ -693,6 +750,10 @@ int flush;
}
INITBITS();
}
if (state->head != Z_NULL) {
state->head->hcrc = (int)((state->flags >> 9) & 1);
state->head->done = 1;
}
strm->adler = state->check = crc32(0L, Z_NULL, 0);
state->mode = TYPE;
break;
@@ -861,6 +922,9 @@ int flush;
}
}
/* handle error breaks in while */
if (state->mode == BAD) break;
/* build code tables */
state->next = state->codes;
state->lencode = (code const FAR *)(state->next);
@@ -965,6 +1029,13 @@ int flush;
state->offset += BITS(state->extra);
DROPBITS(state->extra);
}
#ifdef INFLATE_STRICT
if (state->offset > state->dmax) {
strm->msg = (char *)"invalid distance too far back";
state->mode = BAD;
break;
}
#endif
if (state->offset > state->whave + out - left) {
strm->msg = (char *)"invalid distance too far back";
state->mode = BAD;
@@ -1106,12 +1177,16 @@ uInt dictLength;
/* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if (state->mode != DICT) return Z_STREAM_ERROR;
if (state->wrap != 0 && state->mode != DICT)
return Z_STREAM_ERROR;
/* check for correct dictionary id */
if (state->mode == DICT) {
id = adler32(0L, Z_NULL, 0);
id = adler32(id, dictionary, dictLength);
if (id != state->check) return Z_DATA_ERROR;
if (id != state->check)
return Z_DATA_ERROR;
}
/* copy dictionary to window */
if (updatewindow(strm, strm->avail_out)) {
@@ -1133,6 +1208,23 @@ uInt dictLength;
return Z_OK;
}
int ZEXPORT inflateGetHeader(strm, head)
z_streamp strm;
gz_headerp head;
{
struct inflate_state FAR *state;
/* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
/* save header structure */
state->head = head;
head->done = 0;
return Z_OK;
}
/*
Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff. Return when found
or when out of input. When called, *have is the number of pattern bytes
@@ -1235,6 +1327,7 @@ z_streamp source;
struct inflate_state FAR *state;
struct inflate_state FAR *copy;
unsigned char FAR *window;
unsigned wsize;
/* check input */
if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
@@ -1257,14 +1350,19 @@ z_streamp source;
}
/* copy state */
*dest = *source;
*copy = *state;
zmemcpy(dest, source, sizeof(z_stream));
zmemcpy(copy, state, sizeof(struct inflate_state));
if (state->lencode >= state->codes &&
state->lencode <= state->codes + ENOUGH - 1) {
copy->lencode = copy->codes + (state->lencode - state->codes);
copy->distcode = copy->codes + (state->distcode - state->codes);
}
copy->next = copy->codes + (state->next - state->codes);
if (window != Z_NULL)
zmemcpy(window, state->window, 1U << state->wbits);
if (window != Z_NULL) {
wsize = 1U << state->wbits;
zmemcpy(window, state->window, wsize);
}
copy->window = window;
dest->state = (voidpf)copy;
dest->state = (struct internal_state FAR *)copy;
return Z_OK;
}

8
zlib/inflate.h
View File

@@ -1,5 +1,5 @@
/* inflate.h -- internal inflate state definition
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2004 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -19,7 +19,6 @@
/* Possible inflate modes between inflate() calls */
typedef enum {
HEAD, /* i: waiting for magic header */
#ifdef GUNZIP
FLAGS, /* i: waiting for method and flags (gzip) */
TIME, /* i: waiting for modification time (gzip) */
OS, /* i: waiting for extra flags and operating system (gzip) */
@@ -28,7 +27,6 @@ typedef enum {
NAME, /* i: waiting for end of file name (gzip) */
COMMENT, /* i: waiting for end of comment (gzip) */
HCRC, /* i: waiting for header crc (gzip) */
#endif
DICTID, /* i: waiting for dictionary check value */
DICT, /* waiting for inflateSetDictionary() call */
TYPE, /* i: waiting for type bits, including last-flag bit */
@@ -45,9 +43,7 @@ typedef enum {
MATCH, /* o: waiting for output space to copy string */
LIT, /* o: waiting for output space to write literal */
CHECK, /* i: waiting for 32-bit check value */
#ifdef GUNZIP
LENGTH, /* i: waiting for 32-bit length (gzip) */
#endif
DONE, /* finished check, done -- remain here until reset */
BAD, /* got a data error -- remain here until reset */
MEM, /* got an inflate() memory error -- remain here until reset */
@@ -84,8 +80,10 @@ struct inflate_state {
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
int havedict; /* true if dictionary provided */
int flags; /* gzip header method and flags (0 if zlib) */
unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */
unsigned long check; /* protected copy of check value */
unsigned long total; /* protected copy of output count */
gz_headerp head; /* where to save gzip header information */
/* sliding window */
unsigned wbits; /* log base 2 of requested window size */
unsigned wsize; /* window size or zero if not using window */

20
zlib/inftrees.c
View File

@@ -1,5 +1,5 @@
/* inftrees.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2005 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -9,7 +9,7 @@
#define MAXBITS 15
const char inflate_copyright[] =
" inflate 1.2.1 Copyright 1995-2003 Mark Adler ";
" inflate 1.2.3 Copyright 1995-2005 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@@ -62,7 +62,7 @@ unsigned short FAR *work;
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 76, 66};
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196};
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
@@ -114,7 +114,15 @@ unsigned short FAR *work;
for (max = MAXBITS; max >= 1; max--)
if (count[max] != 0) break;
if (root > max) root = max;
if (max == 0) return -1; /* no codes! */
if (max == 0) { /* no symbols to code at all */
this.op = (unsigned char)64; /* invalid code marker */
this.bits = (unsigned char)1;
this.val = (unsigned short)0;
*(*table)++ = this; /* make a table to force an error */
*(*table)++ = this;
*bits = 1;
return 0; /* no symbols, but wait for decoding to report error */
}
for (min = 1; min <= MAXBITS; min++)
if (count[min] != 0) break;
if (root < min) root = min;
@@ -224,6 +232,7 @@ unsigned short FAR *work;
/* replicate for those indices with low len bits equal to huff */
incr = 1U << (len - drop);
fill = 1U << curr;
min = fill; /* save offset to next table */
do {
fill -= incr;
next[(huff >> drop) + fill] = this;
@@ -254,7 +263,7 @@ unsigned short FAR *work;
drop = root;
/* increment past last table */
next += 1U << curr;
next += min; /* here min is 1 << curr */
/* determine length of next table */
curr = len - drop;
@@ -295,7 +304,6 @@ unsigned short FAR *work;
drop = 0;
len = root;
next = *table;
curr = root;
this.bits = (unsigned char)len;
}

10
zlib/inftrees.h
View File

@@ -1,5 +1,5 @@
/* inftrees.h -- header to use inftrees.c
* Copyright (C) 1995-2003 Mark Adler
* Copyright (C) 1995-2005 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -36,12 +36,12 @@ typedef struct {
*/
/* Maximum size of dynamic tree. The maximum found in a long but non-
exhaustive search was 1004 code structures (850 for length/literals
and 154 for distances, the latter actually the result of an
exhaustive search was 1444 code structures (852 for length/literals
and 592 for distances, the latter actually the result of an
exhaustive search). The true maximum is not known, but the value
below is more than safe. */
#define ENOUGH 1440
#define MAXD 154
#define ENOUGH 2048
#define MAXD 592
/* Type of code to build for inftable() */
typedef enum {

36
zlib/trees.c
View File

@@ -1,5 +1,5 @@
/* trees.c -- output deflated data using Huffman coding
* Copyright (C) 1995-2003 Jean-loup Gailly
* Copyright (C) 1995-2005 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -555,7 +555,7 @@ local void gen_bitlen(s, desc)
while (n != 0) {
m = s->heap[--h];
if (m > max_code) continue;
if (tree[m].Len != (unsigned) bits) {
if ((unsigned) tree[m].Len != (unsigned) bits) {
Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
s->opt_len += ((long)bits - (long)tree[m].Len)
*(long)tree[m].Freq;
@@ -930,8 +930,9 @@ void _tr_flush_block(s, buf, stored_len, eof)
/* Build the Huffman trees unless a stored block is forced */
if (s->level > 0) {
/* Check if the file is ascii or binary */
if (s->data_type == Z_UNKNOWN) set_data_type(s);
/* Check if the file is binary or text */
if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
set_data_type(s);
/* Construct the literal and distance trees */
build_tree(s, (tree_desc *)(&(s->l_desc)));
@@ -982,7 +983,7 @@ void _tr_flush_block(s, buf, stored_len, eof)
#ifdef FORCE_STATIC
} else if (static_lenb >= 0) { /* force static trees */
#else
} else if (static_lenb == opt_lenb) {
} else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
#endif
send_bits(s, (STATIC_TREES<<1)+eof, 3);
compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
@@ -1117,21 +1118,24 @@ local void compress_block(s, ltree, dtree)
}
/* ===========================================================================
* Set the data type to ASCII or BINARY, using a crude approximation:
* binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
* IN assertion: the fields freq of dyn_ltree are set and the total of all
* frequencies does not exceed 64K (to fit in an int on 16 bit machines).
* Set the data type to BINARY or TEXT, using a crude approximation:
* set it to Z_TEXT if all symbols are either printable characters (33 to 255)
* or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
* IN assertion: the fields Freq of dyn_ltree are set.
*/
local void set_data_type(s)
deflate_state *s;
{
int n = 0;
unsigned ascii_freq = 0;
unsigned bin_freq = 0;
while (n < 7) bin_freq += s->dyn_ltree[n++].Freq;
while (n < 128) ascii_freq += s->dyn_ltree[n++].Freq;
while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq;
s->data_type = (Byte)(bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII);
int n;
for (n = 0; n < 9; n++)
if (s->dyn_ltree[n].Freq != 0)
break;
if (n == 9)
for (n = 14; n < 32; n++)
if (s->dyn_ltree[n].Freq != 0)
break;
s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
}
/* ===========================================================================

15
zlib/zconf.h
View File

@@ -1,5 +1,5 @@
/* zconf.h -- configuration of the zlib compression library
* Copyright (C) 1995-2003 Jean-loup Gailly.
* Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -23,15 +23,17 @@
# define deflateSetDictionary z_deflateSetDictionary
# define deflateCopy z_deflateCopy
# define deflateReset z_deflateReset
# define deflatePrime z_deflatePrime
# define deflateParams z_deflateParams
# define deflateBound z_deflateBound
# define deflatePrime z_deflatePrime
# define inflateInit2_ z_inflateInit2_
# define inflateSetDictionary z_inflateSetDictionary
# define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint
# define inflateCopy z_inflateCopy
# define inflateReset z_inflateReset
# define inflateBack z_inflateBack
# define inflateBackEnd z_inflateBackEnd
# define compress z_compress
# define compress2 z_compress2
# define compressBound z_compressBound
@@ -39,7 +41,12 @@
# define adler32 z_adler32
# define crc32 z_crc32
# define get_crc_table z_get_crc_table
# define zError z_zError
# define alloc_func z_alloc_func
# define free_func z_free_func
# define in_func z_in_func
# define out_func z_out_func
# define Byte z_Byte
# define uInt z_uInt
# define uLong z_uLong
@@ -61,9 +68,11 @@
#if defined(_WINDOWS) && !defined(WINDOWS)
# define WINDOWS
#endif
#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
#if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__)
# ifndef WIN32
# define WIN32
# endif
#endif
#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
# ifndef SYS16BIT

249
zlib/zlib.h
View File

@@ -1,7 +1,7 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.2.1, November 17th, 2003
version 1.2.3, July 18th, 2005
Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler
Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
@@ -37,8 +37,8 @@
extern "C" {
#endif
#define ZLIB_VERSION "1.2.1"
#define ZLIB_VERNUM 0x1210
#define ZLIB_VERSION "1.2.3"
#define ZLIB_VERNUM 0x1230
/*
The 'zlib' compression library provides in-memory compression and
@@ -53,24 +53,22 @@ extern "C" {
application must provide more input and/or consume the output
(providing more output space) before each call.
The compressed data format used by the in-memory functions is the zlib
format, which is a zlib wrapper documented in RFC 1950, wrapped around a
deflate stream, which is itself documented in RFC 1951.
The compressed data format used by default by the in-memory functions is
the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
around a deflate stream, which is itself documented in RFC 1951.
The library also supports reading and writing files in gzip (.gz) format
with an interface similar to that of stdio using the functions that start
with "gz". The gzip format is different from the zlib format. gzip is a
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
This library can optionally read and write gzip streams in memory as well.
The zlib format was designed to be compact and fast for use in memory
and on communications channels. The gzip format was designed for single-
file compression on file systems, has a larger header than zlib to maintain
directory information, and uses a different, slower check method than zlib.
This library does not provide any functions to write gzip files in memory.
However such functions could be easily written using zlib's deflate function,
the documentation in the gzip RFC, and the examples in gzio.c.
The library does not install any signal handler. The decoder checks
the consistency of the compressed data, so the library should never
crash even in case of corrupted input.
@@ -97,13 +95,36 @@ typedef struct z_stream_s {
free_func zfree; /* used to free the internal state */
voidpf opaque; /* private data object passed to zalloc and zfree */
int data_type; /* best guess about the data type: ascii or binary */
int data_type; /* best guess about the data type: binary or text */
uLong adler; /* adler32 value of the uncompressed data */
uLong reserved; /* reserved for future use */
} z_stream;
typedef z_stream FAR *z_streamp;
/*
gzip header information passed to and from zlib routines. See RFC 1952
for more details on the meanings of these fields.
*/
typedef struct gz_header_s {
int text; /* true if compressed data believed to be text */
uLong time; /* modification time */
int xflags; /* extra flags (not used when writing a gzip file) */
int os; /* operating system */
Bytef *extra; /* pointer to extra field or Z_NULL if none */
uInt extra_len; /* extra field length (valid if extra != Z_NULL) */
uInt extra_max; /* space at extra (only when reading header) */
Bytef *name; /* pointer to zero-terminated file name or Z_NULL */
uInt name_max; /* space at name (only when reading header) */
Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */
uInt comm_max; /* space at comment (only when reading header) */
int hcrc; /* true if there was or will be a header crc */
int done; /* true when done reading gzip header (not used
when writing a gzip file) */
} gz_header;
typedef gz_header FAR *gz_headerp;
/*
The application must update next_in and avail_in when avail_in has
dropped to zero. It must update next_out and avail_out when avail_out
@@ -168,11 +189,13 @@ typedef z_stream FAR *z_streamp;
#define Z_FILTERED 1
#define Z_HUFFMAN_ONLY 2
#define Z_RLE 3
#define Z_FIXED 4
#define Z_DEFAULT_STRATEGY 0
/* compression strategy; see deflateInit2() below for details */
#define Z_BINARY 0
#define Z_ASCII 1
#define Z_TEXT 1
#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
#define Z_UNKNOWN 2
/* Possible values of the data_type field (though see inflate()) */
@@ -246,6 +269,10 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
and with zero avail_out, it must be called again after making room in the
output buffer because there might be more output pending.
Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
decide how much data to accumualte before producing output, in order to
maximize compression.
If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
flushed to the output buffer and the output is aligned on a byte boundary, so
that the decompressor can get all input data available so far. (In particular
@@ -257,7 +284,7 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
Z_SYNC_FLUSH, and the compression state is reset so that decompression can
restart from this point if previous compressed data has been damaged or if
random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
the compression.
compression.
If deflate returns with avail_out == 0, this function must be called again
with the same value of the flush parameter and more output space (updated
@@ -282,8 +309,8 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
deflate() sets strm->adler to the adler32 checksum of all input read
so far (that is, total_in bytes).
deflate() may update data_type if it can make a good guess about
the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
deflate() may update strm->data_type if it can make a good guess about
the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
binary. This field is only for information purposes and does not affect
the compression algorithm in any manner.
@@ -365,11 +392,11 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
output as possible to the output buffer. Z_BLOCK requests that inflate() stop
if and when it get to the next deflate block boundary. When decoding the zlib
or gzip format, this will cause inflate() to return immediately after the
header and before the first block. When doing a raw inflate, inflate() will
go ahead and process the first block, and will return when it gets to the end
of that block, or when it runs out of data.
if and when it gets to the next deflate block boundary. When decoding the
zlib or gzip format, this will cause inflate() to return immediately after
the header and before the first block. When doing a raw inflate, inflate()
will go ahead and process the first block, and will return when it gets to
the end of that block, or when it runs out of data.
The Z_BLOCK option assists in appending to or combining deflate streams.
Also to assist in this, on return inflate() will set strm->data_type to the
@@ -401,7 +428,7 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
because Z_BLOCK is used.
If a preset dictionary is needed after this call (see inflateSetDictionary
below), inflate sets strm-adler to the adler32 checksum of the dictionary
below), inflate sets strm->adler to the adler32 checksum of the dictionary
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the adler32 checksum of all output produced so far (that is,
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
@@ -478,7 +505,8 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
16 to windowBits to write a simple gzip header and trailer around the
compressed data instead of a zlib wrapper. The gzip header will have no
file name, no extra data, no comment, no modification time (set to zero),
no header crc, and the operating system will be set to 255 (unknown).
no header crc, and the operating system will be set to 255 (unknown). If a
gzip stream is being written, strm->adler is a crc32 instead of an adler32.
The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but
@@ -497,7 +525,9 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
parameter only affects the compression ratio but not the correctness of the
compressed output even if it is not set appropriately.
compressed output even if it is not set appropriately. Z_FIXED prevents the
use of dynamic Huffman codes, allowing for a simpler decoder for special
applications.
deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
@@ -526,7 +556,9 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
deflateInit or deflateInit2, a part of the dictionary may in effect be
discarded, for example if the dictionary is larger than the window size in
deflate or deflate2. Thus the strings most likely to be useful should be
put at the end of the dictionary, not at the front.
put at the end of the dictionary, not at the front. In addition, the
current implementation of deflate will use at most the window size minus
262 bytes of the provided dictionary.
Upon return of this function, strm->adler is set to the adler32 value
of the dictionary; the decompressor may later use this value to determine
@@ -592,6 +624,23 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
if strm->avail_out was zero.
*/
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
int good_length,
int max_lazy,
int nice_length,
int max_chain));
/*
Fine tune deflate's internal compression parameters. This should only be
used by someone who understands the algorithm used by zlib's deflate for
searching for the best matching string, and even then only by the most
fanatic optimizer trying to squeeze out the last compressed bit for their
specific input data. Read the deflate.c source code for the meaning of the
max_lazy, good_length, nice_length, and max_chain parameters.
deflateTune() can be called after deflateInit() or deflateInit2(), and
returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
*/
ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
uLong sourceLen));
/*
@@ -617,6 +666,30 @@ ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
stream state was inconsistent.
*/
ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
gz_headerp head));
/*
deflateSetHeader() provides gzip header information for when a gzip
stream is requested by deflateInit2(). deflateSetHeader() may be called
after deflateInit2() or deflateReset() and before the first call of
deflate(). The text, time, os, extra field, name, and comment information
in the provided gz_header structure are written to the gzip header (xflag is
ignored -- the extra flags are set according to the compression level). The
caller must assure that, if not Z_NULL, name and comment are terminated with
a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
available there. If hcrc is true, a gzip header crc is included. Note that
the current versions of the command-line version of gzip (up through version
1.3.x) do not support header crc's, and will report that it is a "multi-part
gzip file" and give up.
If deflateSetHeader is not used, the default gzip header has text false,
the time set to zero, and os set to 255, with no extra, name, or comment
fields. The gzip header is returned to the default state by deflateReset().
deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
/*
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
int windowBits));
@@ -649,14 +722,15 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
windowBits can also be greater than 15 for optional gzip decoding. Add
32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR).
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is
a crc32 instead of an adler32.
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
memLevel). msg is set to null if there is no error message. inflateInit2
does not perform any decompression apart from reading the zlib header if
present: this will be done by inflate(). (So next_in and avail_in may be
modified, but next_out and avail_out are unchanged.)
memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
is set to null if there is no error message. inflateInit2 does not perform
any decompression apart from reading the zlib header if present: this will
be done by inflate(). (So next_in and avail_in may be modified, but next_out
and avail_out are unchanged.)
*/
ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
@@ -664,11 +738,14 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
uInt dictLength));
/*
Initializes the decompression dictionary from the given uncompressed byte
sequence. This function must be called immediately after a call of inflate
if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by this call of
inflate. The compressor and decompressor must use exactly the same
dictionary (see deflateSetDictionary).
sequence. This function must be called immediately after a call of inflate,
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called
immediately after inflateInit2() or inflateReset() and before any call of
inflate() to set the dictionary. The application must insure that the
dictionary that was used for compression is provided.
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is
@@ -719,8 +796,64 @@ ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
stream state was inconsistent (such as zalloc or state being NULL).
*/
ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
int bits,
int value));
/*
ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
This function inserts bits in the inflate input stream. The intent is
that this function is used to start inflating at a bit position in the
middle of a byte. The provided bits will be used before any bytes are used
from next_in. This function should only be used with raw inflate, and
should be used before the first inflate() call after inflateInit2() or
inflateReset(). bits must be less than or equal to 16, and that many of the
least significant bits of value will be inserted in the input.
inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
gz_headerp head));
/*
inflateGetHeader() requests that gzip header information be stored in the
provided gz_header structure. inflateGetHeader() may be called after
inflateInit2() or inflateReset(), and before the first call of inflate().
As inflate() processes the gzip stream, head->done is zero until the header
is completed, at which time head->done is set to one. If a zlib stream is
being decoded, then head->done is set to -1 to indicate that there will be
no gzip header information forthcoming. Note that Z_BLOCK can be used to
force inflate() to return immediately after header processing is complete
and before any actual data is decompressed.
The text, time, xflags, and os fields are filled in with the gzip header
contents. hcrc is set to true if there is a header CRC. (The header CRC
was valid if done is set to one.) If extra is not Z_NULL, then extra_max
contains the maximum number of bytes to write to extra. Once done is true,
extra_len contains the actual extra field length, and extra contains the
extra field, or that field truncated if extra_max is less than extra_len.
If name is not Z_NULL, then up to name_max characters are written there,
terminated with a zero unless the length is greater than name_max. If
comment is not Z_NULL, then up to comm_max characters are written there,
terminated with a zero unless the length is greater than comm_max. When
any of extra, name, or comment are not Z_NULL and the respective field is
not present in the header, then that field is set to Z_NULL to signal its
absence. This allows the use of deflateSetHeader() with the returned
structure to duplicate the header. However if those fields are set to
allocated memory, then the application will need to save those pointers
elsewhere so that they can be eventually freed.
If inflateGetHeader is not used, then the header information is simply
discarded. The header is always checked for validity, including the header
CRC if present. inflateReset() will reset the process to discard the header
information. The application would need to call inflateGetHeader() again to
retrieve the header from the next gzip stream.
inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
/*
ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
unsigned char FAR *window));
Initialize the internal stream state for decompression using inflateBack()
@@ -744,7 +877,7 @@ ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
in_func in, void FAR *in_desc,
out_func out, void FAR *out_desc));
/*
@@ -813,7 +946,7 @@ ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
that inflateBack() cannot return Z_OK.
*/
ZEXTERN int ZEXPORT inflateBackEnd OF((z_stream FAR *strm));
ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
/*
All memory allocated by inflateBackInit() is freed.
@@ -1087,6 +1220,12 @@ ZEXTERN int ZEXPORT gzeof OF((gzFile file));
input stream, otherwise zero.
*/
ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
/*
Returns 1 if file is being read directly without decompression, otherwise
zero.
*/
ZEXTERN int ZEXPORT gzclose OF((gzFile file));
/*
Flushes all pending output if necessary, closes the compressed file
@@ -1119,7 +1258,6 @@ ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
*/
ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
/*
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
return the updated checksum. If buf is NULL, this function returns
@@ -1135,12 +1273,21 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
if (adler != original_adler) error();
*/
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
z_off_t len2));
/*
Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
*/
ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
/*
Update a running crc with the bytes buf[0..len-1] and return the updated
crc. If buf is NULL, this function returns the required initial value
for the crc. Pre- and post-conditioning (one's complement) is performed
within this function so it shouldn't be done by the application.
Update a running CRC-32 with the bytes buf[0..len-1] and return the
updated CRC-32. If buf is NULL, this function returns the required initial
value for the for the crc. Pre- and post-conditioning (one's complement) is
performed within this function so it shouldn't be done by the application.
Usage example:
uLong crc = crc32(0L, Z_NULL, 0);
@@ -1151,6 +1298,16 @@ ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
if (crc != original_crc) error();
*/
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
/*
Combine two CRC-32 check values into one. For two sequences of bytes,
seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32
check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
len2.
*/
/* various hacks, don't look :) */
@@ -1167,7 +1324,7 @@ ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
int stream_size));
ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
const char *version, int stream_size));
ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
unsigned char FAR *window,
const char *version,
int stream_size));
@@ -1189,7 +1346,7 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
struct internal_state {int dummy;}; /* hack for buggy compilers */
#endif
ZEXTERN const char * ZEXPORT zError OF((int err));
ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));

33
zlib/zutil.c
View File

@@ -1,5 +1,5 @@
/* zutil.c -- target dependent utility functions for the compression library
* Copyright (C) 1995-2003 Jean-loup Gailly.
* Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -11,10 +11,6 @@
struct internal_state {int dummy;}; /* for buggy compilers */
#endif
#ifndef STDC
extern void exit OF((int));
#endif
const char * const z_errmsg[10] = {
"need dictionary", /* Z_NEED_DICT 2 */
"stream end", /* Z_STREAM_END 1 */
@@ -78,38 +74,38 @@ uLong ZEXPORT zlibCompileFlags()
flags += 1 << 13;
#endif
#ifdef NO_GZCOMPRESS
flags += 1 << 16;
flags += 1L << 16;
#endif
#ifdef NO_GZIP
flags += 1 << 17;
flags += 1L << 17;
#endif
#ifdef PKZIP_BUG_WORKAROUND
flags += 1 << 20;
flags += 1L << 20;
#endif
#ifdef FASTEST
flags += 1 << 21;
flags += 1L << 21;
#endif
#ifdef STDC
# ifdef NO_vsnprintf
flags += 1 << 25;
flags += 1L << 25;
# ifdef HAS_vsprintf_void
flags += 1 << 26;
flags += 1L << 26;
# endif
# else
# ifdef HAS_vsnprintf_void
flags += 1 << 26;
flags += 1L << 26;
# endif
# endif
#else
flags += 1 << 24;
flags += 1L << 24;
# ifdef NO_snprintf
flags += 1 << 25;
flags += 1L << 25;
# ifdef HAS_sprintf_void
flags += 1 << 26;
flags += 1L << 26;
# endif
# else
# ifdef HAS_snprintf_void
flags += 1 << 26;
flags += 1L << 26;
# endif
# endif
#endif
@@ -141,7 +137,10 @@ const char * ZEXPORT zError(err)
}
#if defined(_WIN32_WCE)
/* does not exist on WCE */
/* The Microsoft C Run-Time Library for Windows CE doesn't have
* errno. We define it as a global variable to simplify porting.
* Its value is always 0 and should not be used.
*/
int errno = 0;
#endif

25
zlib/zutil.h
View File

@@ -1,5 +1,5 @@
/* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995-2003 Jean-loup Gailly.
* Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -17,15 +17,27 @@
#include "zlib.h"
#ifdef STDC
# ifndef _WIN32_WCE
# include <stddef.h>
# endif
# include <string.h>
# include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
# ifdef _WIN32_WCE
/* The Microsoft C Run-Time Library for Windows CE doesn't have
* errno. We define it as a global variable to simplify porting.
* Its value is always 0 and should not be used. We rename it to
* avoid conflict with other libraries that use the same workaround.
*/
# define errno z_errno
# endif
extern int errno;
#else
# ifndef _WIN32_WCE
# include <errno.h>
# endif
#endif
#ifndef local
# define local static
@@ -105,6 +117,9 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
#ifdef OS2
# define OS_CODE 0x06
# ifdef M_I86
#include <malloc.h>
# endif
#endif
#if defined(MACOS) || defined(TARGET_OS_MAC)
@@ -189,12 +204,8 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# define NO_vsnprintf
# endif
#endif
#ifdef HAVE_STRERROR
extern char *strerror OF((int));
# define zstrerror(errnum) strerror(errnum)
#else
# define zstrerror(errnum) ""
#ifdef VMS
# define NO_vsnprintf
#endif
#if defined(pyr)