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Imported from libpng-1.0.5s.tar

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This commit is contained in:
Glenn Randers-Pehrson 2000-02-18 13:48:52 -06:00
parent 61c32d9e66
commit a77ef625a6
47 changed files with 532 additions and 544 deletions
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27
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.0.5q - February 5, 2000 Libpng 1.0.5s - February 18, 2000
This is not intended to be a public release. It will be replaced This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version. within a few weeks by a public version or by another test version.
@ -139,6 +139,31 @@ version 1.0.5q [February 5, 2000]
Relocated the makefile.solaris warning about PATH problems. Relocated the makefile.solaris warning about PATH problems.
Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
Revised makefile.gcmmx Revised makefile.gcmmx
Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
version 1.0.5r [February 7, 2000]
Removed superfluous prototype for png_get_itxt from png.h
Fixed a bug in pngrtran.c that improperly expanded the background color.
Return *num_text=0 from png_get_text() when appropriate, and fix documentation
of png_get_text() in libpng.txt/libpng.3.
version 1.0.5s [February 18, 2000]
Added "png_jmpbuf()" macro to pngconf.h, to help people migrate to the
new error handler that's planned for the next libpng release, and changed
example.c, pngtest.c, and contrib programs to use this macro.
Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
Fixed a bug in png_read_png() that caused it to fail to expand some images
that it should have expanded.
Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
in pngget.c
Changed the allocation of palette, history, and trans arrays back to
the version 1.0.5 method (linking instead of copying) which restores
backward compatibility with version 1.0.5. Added some remarks about
that in example.c
Updated makefile.linux and makefile.gccmmx to make directories conditionally.
Made cosmetic changes to pngasmrd.h
Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
Modified png_read_png() to allocate info_ptr->row_pointers only if it
hasn't already been allocated.
Send comments/corrections/commendations to Send comments/corrections/commendations to
png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu

23
CHANGES
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@ -611,3 +611,26 @@ version 1.0.5q [February 5, 2000]
Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
Revised makefile.gcmmx Revised makefile.gcmmx
Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
version 1.0.5r [February 7, 2000]
Removed superfluous prototype for png_get_itxt from png.h
Fixed a bug in pngrtran.c that improperly expanded the background color.
Return *num_text=0 from png_get_text() when appropriate, and fix documentation
of png_get_text() in libpng.txt/libpng.3.
version 1.0.5s [February 18, 2000]
Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
new error handler that's planned for the next libpng release, and changed
example.c, pngtest.c, and contrib programs to use this macro.
Revised some of the DLL-export macros in pngconf.h (Greg Roelofs)
Fixed a bug in png_read_png() that caused it to fail to expand some images
that it should have expanded.
Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions
in pngget.c
Changed the allocation of palette, history, and trans arrays back to
the version 1.0.5 method (linking instead of copying) which restores
backward compatibility with version 1.0.5. Added some remarks about
that in example.c. Added "free_me" member to info_ptr and png_ptr.
Updated makefile.linux and makefile.gccmmx to make directories conditionally.
Made cosmetic changes to pngasmrd.h
Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
Modified png_read_png() to allocate info_ptr->row_pointers only if it
hasn't already been allocated.

10
INSTALL
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@ -1,5 +1,5 @@
Installing libpng version 1.0.5q - February 5, 2000 Installing libpng version 1.0.5s - February 18, 2000
Before installing libpng, you must first install zlib. zlib Before installing libpng, you must first install zlib. zlib
can usually be found wherever you got libpng. zlib can be can usually be found wherever you got libpng. zlib can be
@ -10,7 +10,7 @@ zlib.h and zconf.h include files that correspond to the
version of zlib that's installed. version of zlib that's installed.
You can rename the directories that you downloaded (they You can rename the directories that you downloaded (they
might be called "libpng-1.0.5q" or "lpng103" and "zlib-1.1.3" might be called "libpng-1.0.5s" or "lpng103" and "zlib-1.1.3"
or "zlib113") so that you have directories called "zlib" and "libpng". or "zlib113") so that you have directories called "zlib" and "libpng".
Your directory structure should look like this: Your directory structure should look like this:
@ -55,9 +55,9 @@ include
makefile.hpux => HPUX (10.20 and 11.00) makefile makefile.hpux => HPUX (10.20 and 11.00) makefile
makefile.sgi => Silicon Graphics IRIX makefile makefile.sgi => Silicon Graphics IRIX makefile
makefile.sunos => Sun makefile makefile.sunos => Sun makefile
makefile.solaris => Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.5q) makefile.solaris => Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.5s)
makefile.linux => Linux/ELF makefile (gcc, creates libpng.so.2.1.0.5q) makefile.linux => Linux/ELF makefile (gcc, creates libpng.so.2.1.0.5s)
makefile.gcmmx => Linux/ELF makefile (gcc, creates libpng.so.2.1.0.5q, makefile.gcmmx => Linux/ELF makefile (gcc, creates libpng.so.2.1.0.5s,
uses assembler code tuned for Intel MMX platform) uses assembler code tuned for Intel MMX platform)
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
makefile.mips => MIPS makefile makefile.mips => MIPS makefile

7
KNOWNBUG
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@ -74,3 +74,10 @@ Known bugs and suggested enhancements in libpng-1.0.5
The new pnggccrd.c has syntax errors when compiled with gcc. The new pnggccrd.c has syntax errors when compiled with gcc.
STATUS: Under investigation. STATUS: Under investigation.
8. February 2000 -- BUG
When an RGBA file is expanded, only 24 or 48 bits per pixel are reserved
in rowbytes.
STATUS: Fixed in libpng-1.0.5s

4
LICENSE
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@ -5,7 +5,7 @@ Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
Copyright (c) 1996, 1997 Andreas Dilger Copyright (c) 1996, 1997 Andreas Dilger
(libpng versions 0.90, December 1996, through 0.96, May 1997) (libpng versions 0.90, December 1996, through 0.96, May 1997)
Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
(libpng versions 0.97, January 1998, through 1.0.5q, February 5, 2000) (libpng versions 0.97, January 1998, through 1.0.5s, February 18, 2000)
For the purposes of this copyright and license, "Contributing Authors" For the purposes of this copyright and license, "Contributing Authors"
is defined as the following set of individuals: is defined as the following set of individuals:
@ -68,4 +68,4 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson Glenn Randers-Pehrson
randeg@alum.rpi.edu randeg@alum.rpi.edu
February 5, 2000 February 18, 2000

8
README
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@ -1,4 +1,4 @@
README for libpng 1.0.5q - February 5, 2000 (shared library 2.1) README for libpng 1.0.5s - February 18, 2000 (shared library 2.1)
See the note about version numbers near the top of png.h See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng. See INSTALL for instructions on how to install libpng.
@ -175,11 +175,11 @@ Files in this distribution:
makefile.sgi => Silicon Graphics IRIX makefile makefile.sgi => Silicon Graphics IRIX makefile
makefile.sunos => Sun makefile makefile.sunos => Sun makefile
makefile.solaris => Solaris 2.X makefile makefile.solaris => Solaris 2.X makefile
(gcc, creates libpng.so.2.1.0.5q) (gcc, creates libpng.so.2.1.0.5s)
makefile.linux => Linux/ELF makefile makefile.linux => Linux/ELF makefile
(gcc, creates libpng.so.2.1.0.5q) (gcc, creates libpng.so.2.1.0.5s)
makefile.gcmmx => Linux/ELF makefile (gcc, creates makefile.gcmmx => Linux/ELF makefile (gcc, creates
libpng.so.2.1.0.5q, uses assembler code libpng.so.2.1.0.5s, uses assembler code
tuned for Intel MMX platform) tuned for Intel MMX platform)
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
makefile.mips => MIPS makefile makefile.mips => MIPS makefile

4
Y2KINFO
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@ -1,13 +1,13 @@
Y2K compliance in libpng: Y2K compliance in libpng:
========================= =========================
February 5, 2000 February 18, 2000
Since the PNG Development group is an ad-hoc body, we can't make Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.
This is your unofficial assurance that libpng from version 0.71 and This is your unofficial assurance that libpng from version 0.71 and
upward through 1.0.5q are Y2K compliant. It is my belief that earlier upward through 1.0.5s are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant. versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer Libpng only has three year fields. One is a 2-byte unsigned integer

6
contrib/gregbook/readpng.c
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@ -89,7 +89,7 @@ int readpng_init(FILE *infile, long *pWidth, long *pHeight)
/* setjmp() must be called in every function that calls a PNG-reading /* setjmp() must be called in every function that calls a PNG-reading
* libpng function */ * libpng function */
if (setjmp(png_ptr->jmpbuf)) { if (setjmp(png_jmp_env(png_ptr))) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL); png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return 2; return 2;
} }
@ -130,7 +130,7 @@ int readpng_get_bgcolor(uch *red, uch *green, uch *blue)
/* setjmp() must be called in every function that calls a PNG-reading /* setjmp() must be called in every function that calls a PNG-reading
* libpng function */ * libpng function */
if (setjmp(png_ptr->jmpbuf)) { if (setjmp(png_jmp_env(png_ptr))) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL); png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return 2; return 2;
} }
@ -184,7 +184,7 @@ uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes)
/* setjmp() must be called in every function that calls a PNG-reading /* setjmp() must be called in every function that calls a PNG-reading
* libpng function */ * libpng function */
if (setjmp(png_ptr->jmpbuf)) { if (setjmp(png_jmp_env(png_ptr))) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL); png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL; return NULL;
} }

4
contrib/gregbook/readpng2.c
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@ -98,7 +98,7 @@ int readpng2_init(mainprog_info *mainprog_ptr)
* but compatible error handlers must either use longjmp() themselves * but compatible error handlers must either use longjmp() themselves
* (as in this program) or exit immediately, so here we are: */ * (as in this program) or exit immediately, so here we are: */
if (setjmp(mainprog_ptr->jmpbuf)) { if (setjmp(png_jmp_env(mainprog_ptr))) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL); png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return 2; return 2;
} }
@ -136,7 +136,7 @@ int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length)
/* setjmp() must be called in every function that calls a PNG-reading /* setjmp() must be called in every function that calls a PNG-reading
* libpng function */ * libpng function */
if (setjmp(mainprog_ptr->jmpbuf)) { if (setjmp(png_jmp_env(mainprog_ptr))) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL); png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
mainprog_ptr->png_ptr = NULL; mainprog_ptr->png_ptr = NULL;
mainprog_ptr->info_ptr = NULL; mainprog_ptr->info_ptr = NULL;

8
contrib/gregbook/writepng.c
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@ -82,7 +82,7 @@ int writepng_init(mainprog_info *mainprog_ptr)
* but compatible error handlers must either use longjmp() themselves * but compatible error handlers must either use longjmp() themselves
* (as in this program) or exit immediately, so here we go: */ * (as in this program) or exit immediately, so here we go: */
if (setjmp(mainprog_ptr->jmpbuf)) { if (setjmp(png_jmp_env(mainprog_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
return 2; return 2;
} }
@ -239,7 +239,7 @@ int writepng_encode_image(mainprog_info *mainprog_ptr)
/* as always, setjmp() must be called in every function that calls a /* as always, setjmp() must be called in every function that calls a
* PNG-writing libpng function */ * PNG-writing libpng function */
if (setjmp(mainprog_ptr->jmpbuf)) { if (setjmp(png_jmp_env(mainprog_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
mainprog_ptr->png_ptr = NULL; mainprog_ptr->png_ptr = NULL;
mainprog_ptr->info_ptr = NULL; mainprog_ptr->info_ptr = NULL;
@ -277,7 +277,7 @@ int writepng_encode_row(mainprog_info *mainprog_ptr) /* NON-interlaced only! */
/* as always, setjmp() must be called in every function that calls a /* as always, setjmp() must be called in every function that calls a
* PNG-writing libpng function */ * PNG-writing libpng function */
if (setjmp(mainprog_ptr->jmpbuf)) { if (setjmp(png_jmp_env(mainprog_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
mainprog_ptr->png_ptr = NULL; mainprog_ptr->png_ptr = NULL;
mainprog_ptr->info_ptr = NULL; mainprog_ptr->info_ptr = NULL;
@ -307,7 +307,7 @@ int writepng_encode_finish(mainprog_info *mainprog_ptr) /* NON-interlaced! */
/* as always, setjmp() must be called in every function that calls a /* as always, setjmp() must be called in every function that calls a
* PNG-writing libpng function */ * PNG-writing libpng function */
if (setjmp(mainprog_ptr->jmpbuf)) { if (setjmp(png_jmp_env(mainprog_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
mainprog_ptr->png_ptr = NULL; mainprog_ptr->png_ptr = NULL;
mainprog_ptr->info_ptr = NULL; mainprog_ptr->info_ptr = NULL;

2
contrib/pngminus/png2pnm.c
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@ -223,7 +223,7 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a
return FALSE; /* out of memory */ return FALSE; /* out of memory */
} }
if (setjmp (png_ptr->jmpbuf)) if (setjmp (png_jmp_env(png_ptr)))
{ {
png_destroy_read_struct (&png_ptr, &info_ptr, NULL); png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
return FALSE; return FALSE;

2
contrib/pngminus/pnm2png.c
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@ -386,7 +386,7 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
} }
/* setjmp() must be called in every function that calls a PNG-reading libpng function */ /* setjmp() must be called in every function that calls a PNG-reading libpng function */
if (setjmp (png_ptr->jmpbuf)) if (setjmp (png_jmp_env(png_ptr)))
{ {
png_destroy_write_struct (&png_ptr, (png_infopp) NULL); png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
return FALSE; return FALSE;

35
example.c
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@ -111,7 +111,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* file is already open */
* the normal method of doing things with libpng). REQUIRED unless you * the normal method of doing things with libpng). REQUIRED unless you
* set up your own error handlers in the png_create_read_struct() earlier. * set up your own error handlers in the png_create_read_struct() earlier.
*/ */
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
/* Free all of the memory associated with the png_ptr and info_ptr */ /* Free all of the memory associated with the png_ptr and info_ptr */
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL); png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
@ -405,7 +405,7 @@ initialize_png_reader(png_structp *png_ptr, png_infop *info_ptr)
return ERROR; return ERROR;
} }
if (setjmp((*png_ptr)->jmpbuf)) if (setjmp(png_jmp_env((*png_ptr))))
{ {
png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL); png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL);
return ERROR; return ERROR;
@ -433,7 +433,7 @@ int
process_data(png_structp *png_ptr, png_infop *info_ptr, process_data(png_structp *png_ptr, png_infop *info_ptr,
png_bytep buffer, png_uint_32 length) png_bytep buffer, png_uint_32 length)
{ {
if (setjmp((*png_ptr)->jmpbuf)) if (setjmp(png_jmp_env((*png_ptr))))
{ {
/* Free the png_ptr and info_ptr memory on error */ /* Free the png_ptr and info_ptr memory on error */
png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL); png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL);
@ -515,6 +515,7 @@ void write_png(char *file_name /* , ... other image information ... */)
FILE *fp; FILE *fp;
png_structp png_ptr; png_structp png_ptr;
png_infop info_ptr; png_infop info_ptr;
png_colorp palette;
/* open the file */ /* open the file */
fp = fopen(file_name, "wb"); fp = fopen(file_name, "wb");
@ -592,11 +593,9 @@ void write_png(char *file_name /* , ... other image information ... */)
palette = (png_colorp)png_malloc(png_ptr, 256 * sizeof (png_color)); palette = (png_colorp)png_malloc(png_ptr, 256 * sizeof (png_color));
/* ... set palette colors ... */ /* ... set palette colors ... */
png_set_PLTE(png_ptr, info_ptr, palette, 256); png_set_PLTE(png_ptr, info_ptr, palette, 256);
/* You can free the palette here if you like, since libpng has made its /* You must not free palette here, because png_set_PLTE only makes a link to
own copy. In versions of libpng earlier than version 1.0.5n, it was the palette that you malloced. Wait until you are about to destroy
necessary to keep the palette until after png_write_end(), because the png structure. */
libpng was using the caller's copy. */
free(palette);
/* optional significant bit chunk */ /* optional significant bit chunk */
/* if we are dealing with a grayscale image then */ /* if we are dealing with a grayscale image then */
@ -699,10 +698,10 @@ void write_png(char *file_name /* , ... other image information ... */)
* use the first method if you aren't handling interlacing yourself. * use the first method if you aren't handling interlacing yourself.
*/ */
png_uint_32 k, height, width; png_uint_32 k, height, width;
png_byte image[height][width]; png_byte image[height][width*bytes_per_pixel];
png_bytep row_pointers[height]; png_bytep row_pointers[height];
for (k = 0; k < height; k++) for (k = 0; k < height; k++)
row_pointers[k] = image + k*width; row_pointers[k] = image + k*width*bytes_per_pixel;
/* One of the following output methods is REQUIRED */ /* One of the following output methods is REQUIRED */
#ifdef entire /* write out the entire image data in one call */ #ifdef entire /* write out the entire image data in one call */
@ -737,11 +736,17 @@ void write_png(char *file_name /* , ... other image information ... */)
png_write_end(png_ptr, info_ptr); png_write_end(png_ptr, info_ptr);
#endif hilevel #endif hilevel
/* if you malloced a palette and have not already freed it, free it /* If you png_malloced a palette, free it here (don't free info_ptr->palette,
here (do *not* free libpng's copy of the palette in info_ptr->palette, as recommended in versions 1.0.5m and earlier of this example; if
as recommended in versions 1.0.5m and earlier of this example; libpng libpng mallocs info_ptr->palette, libpng will free it). If you
now takes care of that automatically). */ allocated it with malloc() instead of png_malloc(), use free() instead
free(palette); of png_free(). */
png_free(png_ptr, palette);
/* Similarly, if you png_malloced any data that you passed in with
png_set_something(), such as a hist or trans array, free it here,
when you can be sure that libpng is through with it. */
png_free(png_ptr, trans);
/* clean up after the write, and free any memory allocated */ /* clean up after the write, and free any memory allocated */
png_destroy_write_struct(&png_ptr, (png_infopp)NULL); png_destroy_write_struct(&png_ptr, (png_infopp)NULL);

152
libpng.3
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@ -1,6 +1,6 @@
.TH LIBPNG 3 "February 5, 2000" .TH LIBPNG 3 "February 18, 2000"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5q libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5s
.SH SYNOPSIS .SH SYNOPSIS
\fI\fB \fI\fB
@ -92,47 +92,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5q
\fI\fB \fI\fB
\fBvoid png_free_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fI\fP\fB);\fP \fBvoid png_free_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fInum\fP\fB);\fP
\fI\fB
\fBvoid png_free_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fI\fP\fB);\fP
\fI\fB
\fBvoid png_free_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
\fBvoid png_free_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
\fBvoid png_free_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
\fBvoid png_free_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
\fBvoid png_free_spalettes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fInum_text\fP\fB);\fP
\fI\fB
\fBvoid png_free_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
\fBvoid png_free_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fInum_text\fP\fB);\fP
\fI\fB
\fBvoid png_free_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
\fBvoid png_free_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fInum_unknowns\fP\fB);\fP
\fI\fB \fI\fB
@ -262,6 +222,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5q
\fI\fB \fI\fB
\fBpng_bytepp png_get_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
\fI\fB
\fBpng_uint_32 png_get_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fI*sig_bit\fP\fB);\fP \fBpng_uint_32 png_get_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fI*sig_bit\fP\fB);\fP
\fI\fB \fI\fB
@ -270,7 +234,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5q
\fI\fB \fI\fB
\fBpng_uint_32 png_get_spalettes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fP\fI*splt_ptr\fP\fB, int \fInum\fP\fB);\fP \fBpng_uint_32 png_get_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fP\fI*splt_ptr\fP\fB, int \fInum\fP\fB);\fP
\fI\fB \fI\fB
@ -578,6 +542,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5q
\fI\fB \fI\fB
\fBvoid png_set_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytepp \fIrow_pointers\fP\fB);\fP
\fI\fB
\fBvoid png_set_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fIsig_bit\fP\fB);\fP \fBvoid png_set_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fIsig_bit\fP\fB);\fP
\fI\fB \fI\fB
@ -594,7 +562,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5q
\fI\fB \fI\fB
\fBvoid png_set_spalettes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fP\fIsplt_ptr\fP\fB, int \fInum_spalettes\fP\fB);\fP \fBvoid png_set_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fP\fIsplt_ptr\fP\fB, int \fInum_spalettes\fP\fB);\fP
\fI\fB \fI\fB
@ -741,7 +709,7 @@ Following is a copy of the libpng.txt file that accompanies libpng.
.SH LIBPNG.TXT .SH LIBPNG.TXT
libpng.txt - A description on how to use and modify libpng libpng.txt - A description on how to use and modify libpng
libpng version 1.0.5q - February 5, 2000 libpng version 1.0.5s - February 18, 2000
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<randeg@alum.rpi.edu> <randeg@alum.rpi.edu>
Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@ -931,17 +899,18 @@ handling and memory alloc/free functions.
When libpng encounters an error, it expects to longjmp back When libpng encounters an error, it expects to longjmp back
to your routine. Therefore, you will need to call setjmp and pass to your routine. Therefore, you will need to call setjmp and pass
your png_ptr->jmpbuf. If you read the file from different your png_jmp_env(png_ptr). If you read the file from different
routines, you will need to update the jmpbuf field every time you enter routines, you will need to update the jmpbuf field every time you enter
a new routine that will call a png_ function. a new routine that will call a png_ function.
See your documentation of setjmp/longjmp for your compiler for more See your documentation of setjmp/longjmp for your compiler for more
handling in the Customizing Libpng section below for more information on information on setjmp/longjmp. See the discussion on libpng error
the libpng error handling. If an error occurs, and libpng longjmp's handling in the Customizing Libpng section below for more information
on the libpng error handling. If an error occurs, and libpng longjmp's
back to your setjmp, you will want to call png_destroy_read_struct() to back to your setjmp, you will want to call png_destroy_read_struct() to
free any memory. free any memory.
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_read_struct(&png_ptr, &info_ptr, png_destroy_read_struct(&png_ptr, &info_ptr,
&end_info); &end_info);
@ -1289,7 +1258,9 @@ into the info_ptr is returned for any complex types.
valid 16-bit red, green and blue valid 16-bit red, green and blue
values, regardless of color_type values, regardless of color_type
num_text = png_get_text(png_ptr, info_ptr, &text_ptr); num_comments = png_get_text(png_ptr, info_ptr,
&text_ptr, &num_text);
num_comments - number of comments
text_ptr - array of png_text holding image text_ptr - array of png_text holding image
comments comments
text_ptr[i]->compression - type of compression used text_ptr[i]->compression - type of compression used
@ -1307,7 +1278,8 @@ into the info_ptr is returned for any complex types.
text_ptr[i]->lang - language of comment (NULL for unknown). text_ptr[i]->lang - language of comment (NULL for unknown).
text_ptr[i]->translated_keyword - keyword in UTF-8 (NULL text_ptr[i]->translated_keyword - keyword in UTF-8 (NULL
for unknown). for unknown).
num_text - number of comments num_text - number of comments (same as num_comments;
you can put NULL here to avoid the duplication)
num_spalettes = png_get_spalettes(png_ptr, info_ptr, &palette_ptr); num_spalettes = png_get_spalettes(png_ptr, info_ptr, &palette_ptr);
palette_ptr - array of png_spalette structures holding contents palette_ptr - array of png_spalette structures holding contents
of one or more sPLT chunks read. of one or more sPLT chunks read.
@ -1850,32 +1822,26 @@ When you are done, you can free all memory allocated by libpng like this:
&end_info); &end_info);
It is also possible to individually free the info_ptr members that It is also possible to individually free the info_ptr members that
point to allocated storage with the following functions: point to libpng-allocated storage with the following functions:
png_free_text(png_ptr, info_ptr, num) png_free_data(png_ptr, info_ptr, mask, n)
num - number of text item to be freed (-1 for all items) mask - identifies data to be freed, a mask
made up by the OR one or more of
png_free_hIST(png_ptr, info_ptr) PNG_FREE_PLTE, PNG_FREE_TRNS,
PNG_FREE_HIST, PNG_FREE_ICCP,
png_free_iCCP(png_ptr, info_ptr) PNG_FREE_SPLT, PNG_FREE_ROWS,
PNG_FREE_PCAL, PNG_FREE_SCAL,
png_free_pCAL(png_ptr, info_ptr) PNG_FREE_TEXT, PNG_FREE_UNKN,
or simply PNG_FREE_ALL
png_free_sCAL(png_ptr, info_ptr) n - sequence number of item to be freed
(-1 for all items)
png_free_spalettes(png_ptr, info_ptr, num)
num - number of suggested-paletted entry to be freed
(-1 for all suggested palettes)
png_free_pixels(png_ptr, info_ptr)
png_free_unknown_chunk(png_ptr, info_ptr, num)
num - number of unknown chunk to be freed
(-1 for all suggested palettes)
These functions may be safely called when the relevant storage has These functions may be safely called when the relevant storage has
already been freed, or has not yet been allocated, and will in that already been freed, or has not yet been allocated, and will in that
case do nothing. case do nothing. The "n" parameter is ignored if only one item
of the selected data type, such as PLTE, is allowed. If "n" is not
-1, and multiple items are allowed for the data type identified in
the mask, such as text or splt, only the n'th item is freed.
For a more compact example of reading a PNG image, see the file example.c. For a more compact example of reading a PNG image, see the file example.c.
@ -1914,7 +1880,7 @@ png_infop info_ptr;
return -1; return -1;
} }
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_read_struct(&png_ptr, &info_ptr, png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL); (png_infopp)NULL);
@ -1948,7 +1914,7 @@ png_infop info_ptr;
int int
process_data(png_bytep buffer, png_uint_32 length) process_data(png_bytep buffer, png_uint_32 length)
{ {
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_read_struct(&png_ptr, &info_ptr, png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL); (png_infopp)NULL);
@ -2103,15 +2069,15 @@ png_create_write_struct_2() instead of png_create_read_struct():
After you have these structures, you will need to set up the After you have these structures, you will need to set up the
error handling. When libpng encounters an error, it expects to error handling. When libpng encounters an error, it expects to
longjmp() back to your routine. Therefore, you will need to call longjmp() back to your routine. Therefore, you will need to call
setjmp() and pass the png_ptr->jmpbuf. If you setjmp() and pass the png_jmp_env(png_ptr). If you
write the file from different routines, you will need to update write the file from different routines, you will need to update
the jmpbuf field every time you enter a new routine that will the png_jmp_env(png_ptr) every time you enter a new routine that will
call a png_ function. See your documentation of setjmp/longjmp call a png_ function. See your documentation of setjmp/longjmp
for your compiler for more information on setjmp/longjmp. See for your compiler for more information on setjmp/longjmp. See
the discussion on libpng error handling in the Customizing Libpng the discussion on libpng error handling in the Customizing Libpng
section below for more information on the libpng error handling. section below for more information on the libpng error handling.
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(fp); fclose(fp);
@ -2172,7 +2138,7 @@ types.
PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_NONE | PNG_FILTER_SUB |
PNG_FILTER_PAETH); PNG_FILTER_PAETH);
The png_set_compression_???() functions interface to the zlib compression The png_set_compression_*() functions interface to the zlib compression
library, and should mostly be ignored unless you really know what you are library, and should mostly be ignored unless you really know what you are
doing. The only generally useful call is png_set_compression_level() doing. The only generally useful call is png_set_compression_level()
which changes how much time zlib spends on trying to compress the image which changes how much time zlib spends on trying to compress the image
@ -2476,7 +2442,7 @@ At this point there are two ways to proceed; through the high-level
write interface, or through a sequence of low-level write operations. write interface, or through a sequence of low-level write operations.
You can use the high-level interface if your image data is present You can use the high-level interface if your image data is present
on the rowpointers member of the info structure. All defined output on the rowpointers member of the info structure. All defined output
transformations are pernmitted, enabled by the following masks. transformations are permitted, enabled by the following masks.
PNG_TRANSFORM_IDENTITY No transformation PNG_TRANSFORM_IDENTITY No transformation
PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples
@ -2496,7 +2462,7 @@ If you have valid image data on the rowpointers member, simply do this:
where png_transforms is an integer containing the logical-or of some set of where png_transforms is an integer containing the logical-or of some set of
transformation flags. This call is equivalent to png_write_info(), transformation flags. This call is equivalent to png_write_info(),
followed by the set of transformations indicated by the transform followed by the set of transformations indicated by the transform
mask, followed by followed by a write of the image bytes to the info mask, followed by followed by a write of the image bytes from the info
member `rowpointers', followed by png_write_end(). member `rowpointers', followed by png_write_end().
(The final parameter of this call is not yet used. Someday it (The final parameter of this call is not yet used. Someday it
@ -2746,7 +2712,7 @@ When you are done, you can free all memory used by libpng like this:
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
It is also possible to individually free the info_ptr members that It is also possible to individually free the info_ptr members that
point to allocated storage with the following functions: point to libpng-allocated storage with the following functions:
png_free_text(png_ptr, info_ptr, num) png_free_text(png_ptr, info_ptr, num)
num - number of text item to be freed (-1 for all items) num - number of text item to be freed (-1 for all items)
@ -2759,7 +2725,7 @@ point to allocated storage with the following functions:
png_free_sCAL(png_ptr, info_ptr) png_free_sCAL(png_ptr, info_ptr)
png_free_spalettes(png_ptr, info_ptr, num) png_free_sPLT(png_ptr, info_ptr, num)
num - number of suggested-paletted entry to be freed num - number of suggested-paletted entry to be freed
(-1 for all suggested palettes) (-1 for all suggested palettes)
@ -2773,7 +2739,9 @@ These functions may be safely called when the relevant storage has
already been freed, or has not yet been allocated, and will in that already been freed, or has not yet been allocated, and will in that
case do nothing. case do nothing.
If you allocated palette data, you must free it before the call to png_destroy_write_struct(); If you allocated data such as a palette that you passed in to libpng with
png_set_*, you must not free it until just before the call to
png_destroy_write_struct().
For a more compact example of writing a PNG image, see the file example.c. For a more compact example of writing a PNG image, see the file example.c.
@ -2787,7 +2755,7 @@ adding new transformations, and generally changing how libpng works.
All of the memory allocation, input/output, and error handling in libpng All of the memory allocation, input/output, and error handling in libpng
goes through callbacks that are user settable. The default routines are goes through callbacks that are user settable. The default routines are
in pngmem.c, pngrio.c, pngwio.c, and pngerror.c respectively. To change in pngmem.c, pngrio.c, pngwio.c, and pngerror.c respectively. To change
these functions, call the appropriate png_set_???_fn() function. these functions, call the appropriate png_set_*_fn() function.
Memory allocation is done through the functions png_large_malloc(), Memory allocation is done through the functions png_large_malloc(),
png_malloc(), png_realloc(), png_large_free(), and png_free(). These png_malloc(), png_realloc(), png_large_free(), and png_free(). These
@ -2844,7 +2812,7 @@ fprintf() unless the library is compiled with PNG_NO_STDIO defined. If
you wish to change the behavior of the error functions, you will need to you wish to change the behavior of the error functions, you will need to
set up your own message callbacks. These functions are normally supplied set up your own message callbacks. These functions are normally supplied
at the time that the png_struct is created. It is also possible to change at the time that the png_struct is created. It is also possible to change
these functions after png_create_???_struct() has been called by calling: these functions after png_create_*_struct() has been called by calling:
png_set_error_fn(png_structp png_ptr, png_set_error_fn(png_structp png_ptr,
png_voidp error_ptr, png_error_ptr error_fn, png_voidp error_ptr, png_error_ptr error_fn,
@ -2926,7 +2894,7 @@ unsigned char far * far *.
You will need to write new error and warning functions that use the GUI You will need to write new error and warning functions that use the GUI
interface, as described previously, and set them to be the error and interface, as described previously, and set them to be the error and
warning functions at the time that png_create_???_struct() is called, warning functions at the time that png_create_*_struct() is called,
in order to have them available during the structure initialization. in order to have them available during the structure initialization.
They can be changed later via png_set_error_fn(). On some compilers, They can be changed later via png_set_error_fn(). On some compilers,
you may also have to change the memory allocators (png_malloc, etc.). you may also have to change the memory allocators (png_malloc, etc.).
@ -3147,13 +3115,13 @@ the old method.
.SH VII. Y2K Compliance in libpng .SH VII. Y2K Compliance in libpng
February 5, 2000 February 18, 2000
Since the PNG Development group is an ad-hoc body, we can't make Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.
This is your unofficial assurance that libpng from version 0.71 and This is your unofficial assurance that libpng from version 0.71 and
upward through 1.0.5q are Y2K compliant. It is my belief that earlier upward through 1.0.5s are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant. versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that Libpng only has three year fields. One is a 2-byte unsigned integer that
@ -3279,7 +3247,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation. Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.0.5q - February 5, 2000: Libpng version 1.0.5s - February 18, 2000:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (randeg@alum.rpi.edu). Currently maintained by Glenn Randers-Pehrson (randeg@alum.rpi.edu).
@ -3294,7 +3262,7 @@ Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
Copyright (c) 1996, 1997 Andreas Dilger Copyright (c) 1996, 1997 Andreas Dilger
(libpng versions 0.90, December 1996, through 0.96, May 1997) (libpng versions 0.90, December 1996, through 0.96, May 1997)
Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
(libpng versions 0.97, January 1998, through 1.0.5q, February 5, 2000) (libpng versions 0.97, January 1998, through 1.0.5s, February 18, 2000)
For the purposes of this copyright and license, "Contributing Authors" For the purposes of this copyright and license, "Contributing Authors"
is defined as the following set of individuals: is defined as the following set of individuals:

90
libpng.txt
View File

@ -1,6 +1,6 @@
libpng.txt - A description on how to use and modify libpng libpng.txt - A description on how to use and modify libpng
libpng version 1.0.5q - February 5, 2000 libpng version 1.0.5s - February 18, 2000
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<randeg@alum.rpi.edu> <randeg@alum.rpi.edu>
Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@ -190,17 +190,18 @@ handling and memory alloc/free functions.
When libpng encounters an error, it expects to longjmp back When libpng encounters an error, it expects to longjmp back
to your routine. Therefore, you will need to call setjmp and pass to your routine. Therefore, you will need to call setjmp and pass
your png_ptr->jmpbuf. If you read the file from different your png_jmp_env(png_ptr). If you read the file from different
routines, you will need to update the jmpbuf field every time you enter routines, you will need to update the jmpbuf field every time you enter
a new routine that will call a png_ function. a new routine that will call a png_ function.
See your documentation of setjmp/longjmp for your compiler for more See your documentation of setjmp/longjmp for your compiler for more
handling in the Customizing Libpng section below for more information on information on setjmp/longjmp. See the discussion on libpng error
the libpng error handling. If an error occurs, and libpng longjmp's handling in the Customizing Libpng section below for more information
on the libpng error handling. If an error occurs, and libpng longjmp's
back to your setjmp, you will want to call png_destroy_read_struct() to back to your setjmp, you will want to call png_destroy_read_struct() to
free any memory. free any memory.
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_read_struct(&png_ptr, &info_ptr, png_destroy_read_struct(&png_ptr, &info_ptr,
&end_info); &end_info);
@ -548,7 +549,9 @@ into the info_ptr is returned for any complex types.
valid 16-bit red, green and blue valid 16-bit red, green and blue
values, regardless of color_type values, regardless of color_type
num_text = png_get_text(png_ptr, info_ptr, &text_ptr); num_comments = png_get_text(png_ptr, info_ptr,
&text_ptr, &num_text);
num_comments - number of comments
text_ptr - array of png_text holding image text_ptr - array of png_text holding image
comments comments
text_ptr[i]->compression - type of compression used text_ptr[i]->compression - type of compression used
@ -566,7 +569,8 @@ into the info_ptr is returned for any complex types.
text_ptr[i]->lang - language of comment (NULL for unknown). text_ptr[i]->lang - language of comment (NULL for unknown).
text_ptr[i]->translated_keyword - keyword in UTF-8 (NULL text_ptr[i]->translated_keyword - keyword in UTF-8 (NULL
for unknown). for unknown).
num_text - number of comments num_text - number of comments (same as num_comments;
you can put NULL here to avoid the duplication)
num_spalettes = png_get_spalettes(png_ptr, info_ptr, &palette_ptr); num_spalettes = png_get_spalettes(png_ptr, info_ptr, &palette_ptr);
palette_ptr - array of png_spalette structures holding contents palette_ptr - array of png_spalette structures holding contents
of one or more sPLT chunks read. of one or more sPLT chunks read.
@ -1109,32 +1113,26 @@ When you are done, you can free all memory allocated by libpng like this:
&end_info); &end_info);
It is also possible to individually free the info_ptr members that It is also possible to individually free the info_ptr members that
point to allocated storage with the following functions: point to libpng-allocated storage with the following functions:
png_free_text(png_ptr, info_ptr, num) png_free_data(png_ptr, info_ptr, mask, n)
num - number of text item to be freed (-1 for all items) mask - identifies data to be freed, a mask
made up by the OR one or more of
png_free_hIST(png_ptr, info_ptr) PNG_FREE_PLTE, PNG_FREE_TRNS,
PNG_FREE_HIST, PNG_FREE_ICCP,
png_free_iCCP(png_ptr, info_ptr) PNG_FREE_SPLT, PNG_FREE_ROWS,
PNG_FREE_PCAL, PNG_FREE_SCAL,
png_free_pCAL(png_ptr, info_ptr) PNG_FREE_TEXT, PNG_FREE_UNKN,
or simply PNG_FREE_ALL
png_free_sCAL(png_ptr, info_ptr) n - sequence number of item to be freed
(-1 for all items)
png_free_spalettes(png_ptr, info_ptr, num)
num - number of suggested-paletted entry to be freed
(-1 for all suggested palettes)
png_free_pixels(png_ptr, info_ptr)
png_free_unknown_chunk(png_ptr, info_ptr, num)
num - number of unknown chunk to be freed
(-1 for all suggested palettes)
These functions may be safely called when the relevant storage has These functions may be safely called when the relevant storage has
already been freed, or has not yet been allocated, and will in that already been freed, or has not yet been allocated, and will in that
case do nothing. case do nothing. The "n" parameter is ignored if only one item
of the selected data type, such as PLTE, is allowed. If "n" is not
-1, and multiple items are allowed for the data type identified in
the mask, such as text or splt, only the n'th item is freed.
For a more compact example of reading a PNG image, see the file example.c. For a more compact example of reading a PNG image, see the file example.c.
@ -1173,7 +1171,7 @@ png_infop info_ptr;
return -1; return -1;
} }
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_read_struct(&png_ptr, &info_ptr, png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL); (png_infopp)NULL);
@ -1207,7 +1205,7 @@ png_infop info_ptr;
int int
process_data(png_bytep buffer, png_uint_32 length) process_data(png_bytep buffer, png_uint_32 length)
{ {
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_read_struct(&png_ptr, &info_ptr, png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL); (png_infopp)NULL);
@ -1362,15 +1360,15 @@ png_create_write_struct_2() instead of png_create_read_struct():
After you have these structures, you will need to set up the After you have these structures, you will need to set up the
error handling. When libpng encounters an error, it expects to error handling. When libpng encounters an error, it expects to
longjmp() back to your routine. Therefore, you will need to call longjmp() back to your routine. Therefore, you will need to call
setjmp() and pass the png_ptr->jmpbuf. If you setjmp() and pass the png_jmp_env(png_ptr). If you
write the file from different routines, you will need to update write the file from different routines, you will need to update
the jmpbuf field every time you enter a new routine that will the png_jmp_env(png_ptr) every time you enter a new routine that will
call a png_ function. See your documentation of setjmp/longjmp call a png_ function. See your documentation of setjmp/longjmp
for your compiler for more information on setjmp/longjmp. See for your compiler for more information on setjmp/longjmp. See
the discussion on libpng error handling in the Customizing Libpng the discussion on libpng error handling in the Customizing Libpng
section below for more information on the libpng error handling. section below for more information on the libpng error handling.
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_jmp_env(png_ptr)))
{ {
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(fp); fclose(fp);
@ -1431,7 +1429,7 @@ types.
PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_NONE | PNG_FILTER_SUB |
PNG_FILTER_PAETH); PNG_FILTER_PAETH);
The png_set_compression_???() functions interface to the zlib compression The png_set_compression_*() functions interface to the zlib compression
library, and should mostly be ignored unless you really know what you are library, and should mostly be ignored unless you really know what you are
doing. The only generally useful call is png_set_compression_level() doing. The only generally useful call is png_set_compression_level()
which changes how much time zlib spends on trying to compress the image which changes how much time zlib spends on trying to compress the image
@ -1735,7 +1733,7 @@ At this point there are two ways to proceed; through the high-level
write interface, or through a sequence of low-level write operations. write interface, or through a sequence of low-level write operations.
You can use the high-level interface if your image data is present You can use the high-level interface if your image data is present
on the rowpointers member of the info structure. All defined output on the rowpointers member of the info structure. All defined output
transformations are pernmitted, enabled by the following masks. transformations are permitted, enabled by the following masks.
PNG_TRANSFORM_IDENTITY No transformation PNG_TRANSFORM_IDENTITY No transformation
PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples PNG_TRANSFORM_PACKING Pack 1, 2 and 4-bit samples
@ -1755,7 +1753,7 @@ If you have valid image data on the rowpointers member, simply do this:
where png_transforms is an integer containing the logical-or of some set of where png_transforms is an integer containing the logical-or of some set of
transformation flags. This call is equivalent to png_write_info(), transformation flags. This call is equivalent to png_write_info(),
followed by the set of transformations indicated by the transform followed by the set of transformations indicated by the transform
mask, followed by followed by a write of the image bytes to the info mask, followed by followed by a write of the image bytes from the info
member `rowpointers', followed by png_write_end(). member `rowpointers', followed by png_write_end().
(The final parameter of this call is not yet used. Someday it (The final parameter of this call is not yet used. Someday it
@ -2005,7 +2003,7 @@ When you are done, you can free all memory used by libpng like this:
png_destroy_write_struct(&png_ptr, &info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr);
It is also possible to individually free the info_ptr members that It is also possible to individually free the info_ptr members that
point to allocated storage with the following functions: point to libpng-allocated storage with the following functions:
png_free_text(png_ptr, info_ptr, num) png_free_text(png_ptr, info_ptr, num)
num - number of text item to be freed (-1 for all items) num - number of text item to be freed (-1 for all items)
@ -2018,7 +2016,7 @@ point to allocated storage with the following functions:
png_free_sCAL(png_ptr, info_ptr) png_free_sCAL(png_ptr, info_ptr)
png_free_spalettes(png_ptr, info_ptr, num) png_free_sPLT(png_ptr, info_ptr, num)
num - number of suggested-paletted entry to be freed num - number of suggested-paletted entry to be freed
(-1 for all suggested palettes) (-1 for all suggested palettes)
@ -2032,7 +2030,9 @@ These functions may be safely called when the relevant storage has
already been freed, or has not yet been allocated, and will in that already been freed, or has not yet been allocated, and will in that
case do nothing. case do nothing.
If you allocated palette data, you must free it before the call to png_destroy_write_struct(); If you allocated data such as a palette that you passed in to libpng with
png_set_*, you must not free it until just before the call to
png_destroy_write_struct().
For a more compact example of writing a PNG image, see the file example.c. For a more compact example of writing a PNG image, see the file example.c.
@ -2046,7 +2046,7 @@ adding new transformations, and generally changing how libpng works.
All of the memory allocation, input/output, and error handling in libpng All of the memory allocation, input/output, and error handling in libpng
goes through callbacks that are user settable. The default routines are goes through callbacks that are user settable. The default routines are
in pngmem.c, pngrio.c, pngwio.c, and pngerror.c respectively. To change in pngmem.c, pngrio.c, pngwio.c, and pngerror.c respectively. To change
these functions, call the appropriate png_set_???_fn() function. these functions, call the appropriate png_set_*_fn() function.
Memory allocation is done through the functions png_large_malloc(), Memory allocation is done through the functions png_large_malloc(),
png_malloc(), png_realloc(), png_large_free(), and png_free(). These png_malloc(), png_realloc(), png_large_free(), and png_free(). These
@ -2103,7 +2103,7 @@ fprintf() unless the library is compiled with PNG_NO_STDIO defined. If
you wish to change the behavior of the error functions, you will need to you wish to change the behavior of the error functions, you will need to
set up your own message callbacks. These functions are normally supplied set up your own message callbacks. These functions are normally supplied
at the time that the png_struct is created. It is also possible to change at the time that the png_struct is created. It is also possible to change
these functions after png_create_???_struct() has been called by calling: these functions after png_create_*_struct() has been called by calling:
png_set_error_fn(png_structp png_ptr, png_set_error_fn(png_structp png_ptr,
png_voidp error_ptr, png_error_ptr error_fn, png_voidp error_ptr, png_error_ptr error_fn,
@ -2185,7 +2185,7 @@ Configuring for gui/windowing platforms:
You will need to write new error and warning functions that use the GUI You will need to write new error and warning functions that use the GUI
interface, as described previously, and set them to be the error and interface, as described previously, and set them to be the error and
warning functions at the time that png_create_???_struct() is called, warning functions at the time that png_create_*_struct() is called,
in order to have them available during the structure initialization. in order to have them available during the structure initialization.
They can be changed later via png_set_error_fn(). On some compilers, They can be changed later via png_set_error_fn(). On some compilers,
you may also have to change the memory allocators (png_malloc, etc.). you may also have to change the memory allocators (png_malloc, etc.).
@ -2406,13 +2406,13 @@ the old method.
VII. Y2K Compliance in libpng VII. Y2K Compliance in libpng
February 5, 2000 February 18, 2000
Since the PNG Development group is an ad-hoc body, we can't make Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.
This is your unofficial assurance that libpng from version 0.71 and This is your unofficial assurance that libpng from version 0.71 and
upward through 1.0.5q are Y2K compliant. It is my belief that earlier upward through 1.0.5s are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant. versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that Libpng only has three year fields. One is a 2-byte unsigned integer that

4
libpngpf.3
View File

@ -1,6 +1,6 @@
.TH LIBPNGPF 3 February 5, 2000 .TH LIBPNGPF 3 February 18, 2000
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5q libpng \- Portable Network Graphics (PNG) Reference Library 1.0.5s
(private functions) (private functions)
.SH SYNOPSIS .SH SYNOPSIS
\fB#include <png.h>\fP \fB#include <png.h>\fP

2
png.5
View File

@ -1,4 +1,4 @@
.TH PNG 5 "February 5, 2000" .TH PNG 5 "February 18, 2000"
.SH NAME .SH NAME
png \- Portable Network Graphics (PNG) format png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION .SH DESCRIPTION

159
png.c
View File

@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions /* png.c - location for general purpose libpng functions
* *
* libpng version 1.0.5q - February 5, 2000 * libpng version 1.0.5s - February 18, 2000
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@ -19,7 +19,7 @@
#ifdef PNG_USE_GLOBAL_ARRAYS #ifdef PNG_USE_GLOBAL_ARRAYS
/* png_libpng_ver was changed to a function in version 1.0.5c */ /* png_libpng_ver was changed to a function in version 1.0.5c */
char png_libpng_ver[12] = "1.0.5q"; char png_libpng_ver[12] = "1.0.5s";
/* png_sig was changed to a function in version 1.0.5c */ /* png_sig was changed to a function in version 1.0.5c */
/* Place to hold the signature string for a PNG file. */ /* Place to hold the signature string for a PNG file. */
@ -62,10 +62,10 @@ int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
/* offset to next interlace block in the y direction */ /* offset to next interlace block in the y direction */
int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
/* Width of interlace block. This is not currently used - if you need /* width of interlace block (used in assembler routines only) */
* it, uncomment it here and in png.h #ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
*/ #endif
/* Height of interlace block. This is not currently used - if you need /* Height of interlace block. This is not currently used - if you need
* it, uncomment it here and in png.h * it, uncomment it here and in png.h
@ -259,13 +259,16 @@ png_info_init(png_infop info_ptr)
png_memset(info_ptr, 0, sizeof (png_info)); png_memset(info_ptr, 0, sizeof (png_info));
} }
#if defined(PNG_TEXT_SUPPORTED)
/* free text item num or (if num == -1) all text items */
void void
png_free_text(png_structp png_ptr, png_infop info_ptr, int num) png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, int num)
{ {
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
#if defined(PNG_TEXT_SUPPORTED)
/* free text item num or (if num == -1) all text items */
if (mask & PNG_FREE_TEXT)
{
if (num != -1) if (num != -1)
{ {
if (info_ptr->text[num].key) if (info_ptr->text[num].key)
@ -277,13 +280,10 @@ png_free_text(png_structp png_ptr, png_infop info_ptr, int num)
else if (info_ptr->text != NULL) else if (info_ptr->text != NULL)
{ {
int i; int i;
if(info_ptr->text != NULL)
{
for (i = 0; i < info_ptr->num_text; i++) for (i = 0; i < info_ptr->num_text; i++)
png_free_text(png_ptr, info_ptr, i); png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
png_free(png_ptr, info_ptr->text); png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL; info_ptr->text = NULL;
}
info_ptr->num_text=0; info_ptr->num_text=0;
} }
} }
@ -291,13 +291,11 @@ png_free_text(png_structp png_ptr, png_infop info_ptr, int num)
#if defined(PNG_tRNS_SUPPORTED) #if defined(PNG_tRNS_SUPPORTED)
/* free any tRNS entry */ /* free any tRNS entry */
void if (mask & PNG_FREE_TRNS)
png_free_tRNS(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_tRNS) if (info_ptr->valid & PNG_INFO_tRNS)
{ {
if (info_ptr->free_me & PNG_FREE_TRNS)
png_free(png_ptr, info_ptr->trans); png_free(png_ptr, info_ptr->trans);
info_ptr->valid &= ~PNG_INFO_tRNS; info_ptr->valid &= ~PNG_INFO_tRNS;
} }
@ -306,19 +304,13 @@ png_free_tRNS(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_sCAL_SUPPORTED) #if defined(PNG_sCAL_SUPPORTED)
/* free any sCAL entry */ /* free any sCAL entry */
void if (mask & PNG_FREE_SCAL)
png_free_sCAL(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_sCAL) if (info_ptr->valid & PNG_INFO_sCAL)
{ {
#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) #if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
png_free(png_ptr, info_ptr->scal_s_width); png_free(png_ptr, info_ptr->scal_s_width);
png_free(png_ptr, info_ptr->scal_s_height); png_free(png_ptr, info_ptr->scal_s_height);
#else
if(png_ptr != NULL)
/* silence a compiler warning */ ;
#endif #endif
info_ptr->valid &= ~PNG_INFO_sCAL; info_ptr->valid &= ~PNG_INFO_sCAL;
} }
@ -327,11 +319,8 @@ png_free_sCAL(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_pCAL_SUPPORTED) #if defined(PNG_pCAL_SUPPORTED)
/* free any pCAL entry */ /* free any pCAL entry */
void if (mask & PNG_FREE_PCAL)
png_free_pCAL(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_pCAL) if (info_ptr->valid & PNG_INFO_pCAL)
{ {
png_free(png_ptr, info_ptr->pcal_purpose); png_free(png_ptr, info_ptr->pcal_purpose);
@ -352,15 +341,15 @@ png_free_pCAL(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_iCCP_SUPPORTED) #if defined(PNG_iCCP_SUPPORTED)
/* free any iCCP entry */ /* free any iCCP entry */
void if (mask & PNG_FREE_ICCP)
png_free_iCCP(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_iCCP) if (info_ptr->valid & PNG_INFO_iCCP)
{
if (info_ptr->free_me & PNG_FREE_ICCP)
{ {
png_free(png_ptr, info_ptr->iccp_name); png_free(png_ptr, info_ptr->iccp_name);
png_free(png_ptr, info_ptr->iccp_profile); png_free(png_ptr, info_ptr->iccp_profile);
}
info_ptr->valid &= ~PNG_INFO_iCCP; info_ptr->valid &= ~PNG_INFO_iCCP;
} }
} }
@ -368,11 +357,8 @@ png_free_iCCP(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_sPLT_SUPPORTED) #if defined(PNG_sPLT_SUPPORTED)
/* free a given sPLT entry, or (if num == -1) all sPLT entries */ /* free a given sPLT entry, or (if num == -1) all sPLT entries */
void if (mask & PNG_FREE_SPLT)
png_free_spalettes(png_structp png_ptr, png_infop info_ptr, int num)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num != -1) if (num != -1)
{ {
png_free(png_ptr, info_ptr->splt_palettes[num].name); png_free(png_ptr, info_ptr->splt_palettes[num].name);
@ -380,27 +366,23 @@ png_free_spalettes(png_structp png_ptr, png_infop info_ptr, int num)
info_ptr->valid &= ~PNG_INFO_sPLT; info_ptr->valid &= ~PNG_INFO_sPLT;
} }
else else
{
if(info_ptr->splt_palettes_num)
{ {
int i; int i;
if(info_ptr->splt_palettes_num == 0)
return;
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
png_free_spalettes(png_ptr, info_ptr, i); png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
png_free(png_ptr, info_ptr->splt_palettes); png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes_num = 0; info_ptr->splt_palettes_num = 0;
} }
}
} }
#endif #endif
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
void if (mask & PNG_FREE_UNKN)
png_free_unknown_chunks(png_structp png_ptr, png_infop info_ptr, int num)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num != -1) if (num != -1)
{ {
png_free(png_ptr, info_ptr->unknown_chunks[num].data); png_free(png_ptr, info_ptr->unknown_chunks[num].data);
@ -410,38 +392,25 @@ png_free_unknown_chunks(png_structp png_ptr, png_infop info_ptr, int num)
{ {
int i; int i;
if(info_ptr->unknown_chunks_num == 0) if(info_ptr->unknown_chunks_num)
return; {
for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++) for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
png_free_unknown_chunks(png_ptr, info_ptr, i); png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
png_free(png_ptr, info_ptr->unknown_chunks); png_free(png_ptr, info_ptr->unknown_chunks);
info_ptr->unknown_chunks_num = 0; info_ptr->unknown_chunks_num = 0;
} }
}
void
png_free_chunk_list(png_structp png_ptr)
{
if (png_ptr == NULL)
return;
if (png_ptr->num_chunk_list)
{
png_free(png_ptr, png_ptr->chunk_list);
png_ptr->num_chunk_list=0;
} }
} }
#endif #endif
#if defined(PNG_hIST_SUPPORTED) #if defined(PNG_hIST_SUPPORTED)
/* free any hIST entry */ /* free any hIST entry */
void if (mask & PNG_FREE_HIST)
png_free_hIST(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_hIST) if (info_ptr->valid & PNG_INFO_hIST)
{ {
if (info_ptr->free_me & PNG_FREE_HIST)
png_free(png_ptr, info_ptr->hist); png_free(png_ptr, info_ptr->hist);
info_ptr->valid &= ~PNG_INFO_hIST; info_ptr->valid &= ~PNG_INFO_hIST;
} }
@ -449,38 +418,34 @@ png_free_hIST(png_structp png_ptr, png_infop info_ptr)
#endif #endif
/* free any PLTE entry that was internally allocated */ /* free any PLTE entry that was internally allocated */
void if (mask & PNG_FREE_PLTE)
png_free_PLTE(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->valid & PNG_INFO_PLTE) if (info_ptr->valid & PNG_INFO_PLTE)
{ {
if (info_ptr->valid & PNG_ALLOCATED_INFO_PLTE) if (info_ptr->free_me & PNG_FREE_PLTE)
png_zfree(png_ptr, info_ptr->palette); png_zfree(png_ptr, info_ptr->palette);
info_ptr->valid &= ~(PNG_INFO_PLTE|PNG_ALLOCATED_INFO_PLTE); info_ptr->valid &= ~(PNG_INFO_PLTE);
info_ptr->num_palette = 0; info_ptr->num_palette = 0;
} }
} }
#if defined(PNG_INFO_IMAGE_SUPPORTED) #if defined(PNG_INFO_IMAGE_SUPPORTED)
/* free any image bits attached to the info structure */ /* free any image bits attached to the info structure */
void if (mask & PNG_FREE_ROWS)
png_free_pixels(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr == NULL || info_ptr == NULL) if (info_ptr->free_me & PNG_FREE_ROWS)
return;
if (info_ptr->valid & PNG_INFO_IDAT)
{ {
int row; int row;
for (row = 0; row < (int)info_ptr->height; row++) for (row = 0; row < (int)info_ptr->height; row++)
png_free(png_ptr, info_ptr->row_pointers[row]); png_free(png_ptr, info_ptr->row_pointers[row]);
png_free(png_ptr, info_ptr->row_pointers); png_free(png_ptr, info_ptr->row_pointers);
info_ptr->valid &= ~PNG_INFO_IDAT;
} }
} }
#endif #endif
if(num == -1)
info_ptr->free_me &= ~mask;
}
/* This is an internal routine to free any memory that the info struct is /* This is an internal routine to free any memory that the info struct is
* pointing to before re-using it or freeing the struct itself. Recall * pointing to before re-using it or freeing the struct itself. Recall
@ -490,35 +455,17 @@ void
png_info_destroy(png_structp png_ptr, png_infop info_ptr) png_info_destroy(png_structp png_ptr, png_infop info_ptr)
{ {
png_debug(1, "in png_info_destroy\n"); png_debug(1, "in png_info_destroy\n");
#if defined(PNG_READ_TEXT_SUPPORTED)
png_free_text(png_ptr, info_ptr, -1); png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
#endif
#if defined(PNG_READ_tRNS_SUPPORTED)
png_free_tRNS(png_ptr, info_ptr);
#endif
#if defined(PNG_READ_sCAL_SUPPORTED)
png_free_sCAL(png_ptr, info_ptr);
#endif
#if defined(PNG_READ_pCAL_SUPPORTED)
png_free_pCAL(png_ptr, info_ptr);
#endif
#if defined(PNG_READ_iCCP_SUPPORTED)
png_free_iCCP(png_ptr, info_ptr);
#endif
#if defined(PNG_READ_sPLT_SUPPORTED)
png_free_spalettes(png_ptr, info_ptr, -1);
#endif
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
png_free_unknown_chunks(png_ptr, info_ptr, -1); if (png_ptr->num_chunk_list)
png_free_chunk_list(png_ptr); {
#endif png_free(png_ptr, png_ptr->chunk_list);
#if defined(PNG_hIST_SUPPORTED) png_ptr->num_chunk_list=0;
png_free_hIST(png_ptr, info_ptr); }
#endif
png_free_PLTE(png_ptr, info_ptr);
#if defined(PNG_INFO_IMAGE_SUPPORTED)
png_free_pixels(png_ptr, info_ptr);
#endif #endif
png_info_init(info_ptr); png_info_init(info_ptr);
} }
@ -596,7 +543,7 @@ png_charp
png_get_copyright(png_structp png_ptr) png_get_copyright(png_structp png_ptr)
{ {
if (png_ptr != NULL || png_ptr == NULL) /* silence compiler warning */ if (png_ptr != NULL || png_ptr == NULL) /* silence compiler warning */
return ("\n libpng version 1.0.5q - February 5, 2000\n\ return ("\n libpng version 1.0.5s - February 18, 2000\n\
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n\ Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n\
Copyright (c) 1996, 1997 Andreas Dilger\n\ Copyright (c) 1996, 1997 Andreas Dilger\n\
Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson\n"); Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson\n");
@ -614,8 +561,8 @@ png_get_libpng_ver(png_structp png_ptr)
{ {
/* Version of *.c files used when building libpng */ /* Version of *.c files used when building libpng */
if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */ if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return("1.0.5q"); return("1.0.5s");
return("1.0.5q"); return("1.0.5s");
} }
png_charp png_charp
@ -639,9 +586,9 @@ png_get_header_version(png_structp png_ptr)
/* Generate a compiler error if there is an old png.h in the search path. */ /* Generate a compiler error if there is an old png.h in the search path. */
void void
png_check_version png_check_version
(version_1_0_5q png_h_is_not_version_1_0_5q) (version_1_0_5s png_h_is_not_version_1_0_5s)
{ {
if(png_h_is_not_version_1_0_5q == NULL) if(png_h_is_not_version_1_0_5s == NULL)
return; return;
} }

123
png.h
View File

@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library /* png.h - header file for PNG reference library
* *
* libpng version 1.0.5q - February 5, 2000 * libpng version 1.0.5s - February 18, 2000
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@ -9,19 +9,19 @@
* Authors and maintainers: * Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.89c, May 1996: Guy Schalnat * libpng versions 0.71, May 1995, through 0.89c, May 1996: Guy Schalnat
* libpng versions 0.90, December 1996, through 0.96, May 1997: Andreas Dilger * libpng versions 0.90, December 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.0.5q - February 5, 2000: Glenn * libpng versions 0.97, January 1998, through 1.0.5s - February 18, 2000: Glenn
* See also "Contributing Authors", below. * See also "Contributing Authors", below.
* *
* Y2K compliance in libpng: * Y2K compliance in libpng:
* ========================= * =========================
* *
* February 5, 2000 * February 18, 2000
* *
* Since the PNG Development group is an ad-hoc body, we can't make * Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration. * an official declaration.
* *
* This is your unofficial assurance that libpng from version 0.71 and * This is your unofficial assurance that libpng from version 0.71 and
* upward through 1.0.5q are Y2K compliant. It is my belief that earlier * upward through 1.0.5s are Y2K compliant. It is my belief that earlier
* versions were also Y2K compliant. * versions were also Y2K compliant.
* *
* Libpng only has three year fields. One is a 2-byte unsigned integer * Libpng only has three year fields. One is a 2-byte unsigned integer
@ -98,8 +98,9 @@
* 1.0.4a-f 1.0.4a-f 10005 2.1.0.4a-f * 1.0.4a-f 1.0.4a-f 10005 2.1.0.4a-f
* 1.0.5 1.0.5 10005 2.1.0.5 * 1.0.5 1.0.5 10005 2.1.0.5
* 1.0.5a-d 1.0.5a-d 10006 2.1.0.5a-d * 1.0.5a-d 1.0.5a-d 10006 2.1.0.5a-d
* 1.0.5e-p 1.0.5e-p 10100 2.1.0.5e-p * 1.0.5e-r 1.0.5e-r 10100 2.1.0.5e-r (not compatible)
* 1.1.0 1.1.0 10100 3.1.1.0 * 1.0.5s 1.0.5s 10006 2.1.0.5s (compatible)
* 1.3.0 1.3.0 10300 3.1.3.0
* *
* Henceforth the source version will match the shared-library minor * Henceforth the source version will match the shared-library minor
* and patch numbers; the shared-library major version number will be * and patch numbers; the shared-library major version number will be
@ -123,7 +124,7 @@
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
* (libpng versions 0.90, December 1996, through 0.96, May 1997) * (libpng versions 0.90, December 1996, through 0.96, May 1997)
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
* (libpng versions 0.97, January 1998, through 1.0.5q, February 5, 2000) * (libpng versions 0.97, January 1998, through 1.0.5s, February 18, 2000)
* *
* For the purposes of this copyright and license, "Contributing Authors" * For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals: * is defined as the following set of individuals:
@ -212,6 +213,11 @@
/* include all user configurable info */ /* include all user configurable info */
#include "pngconf.h" #include "pngconf.h"
/* macros for optional assembler routines */
#if defined(PNG_INTERNAL) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)
# include "pngasmrd.h"
#endif
/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ /* Inhibit C++ name-mangling for libpng functions but not for system calls. */
#ifdef __cplusplus #ifdef __cplusplus
extern "C" { extern "C" {
@ -224,14 +230,14 @@ extern "C" {
*/ */
/* Version information for png.h - this should match the version in png.c */ /* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.0.5q" #define PNG_LIBPNG_VER_STRING "1.0.5s"
/* Careful here. At one time, Guy wanted to use 082, but that would be octal. /* Careful here. At one time, Guy wanted to use 082, but that would be octal.
* We must not include leading zeros. * We must not include leading zeros.
* Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
* version 1.0.0 was mis-numbered 100 instead of 10000). From * version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=bugfix */ * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=bugfix */
#define PNG_LIBPNG_VER 10100 /* 1.1.0 */ #define PNG_LIBPNG_VER 10006 /* 1.0.6 */
/* Note to maintainer: update this number in scripts/pngdef.pas as well */ /* Note to maintainer: update this number in scripts/pngdef.pas as well */
@ -255,9 +261,11 @@ PNG_EXPORT_VAR (int FARDATA) png_pass_ystart[7];
PNG_EXPORT_VAR (int FARDATA) png_pass_yinc[7]; PNG_EXPORT_VAR (int FARDATA) png_pass_yinc[7];
PNG_EXPORT_VAR (int FARDATA) png_pass_mask[7]; PNG_EXPORT_VAR (int FARDATA) png_pass_mask[7];
PNG_EXPORT_VAR (int FARDATA) png_pass_dsp_mask[7]; PNG_EXPORT_VAR (int FARDATA) png_pass_dsp_mask[7];
/* These aren't currently used. If you need them, see png.c for more details #ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
PNG_EXPORT_VAR (int FARDATA) png_pass_width[7]; extern int FARDATA png_pass_width[7]; /* now used in pngvcrd.c, pnggccrd.c */
PNG_EXPORT_VAR (int FARDATA) png_pass_height[7]; #endif
/* This isn't currently used. If you need it, see png.c for more details.
extern int FARDATA png_pass_height[7];
*/ */
#endif #endif
@ -446,7 +454,7 @@ typedef struct png_info_struct
png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
/* The following is informational only on read, and not used on writes. */ /* The following is informational only on read, and not used on writes. */
png_byte channels; /* number of data channels per pixel (1, 3, 4)*/ png_byte channels; /* number of data channels per pixel (1, 2, 3, 4)*/
png_byte pixel_depth; /* number of bits per pixel */ png_byte pixel_depth; /* number of bits per pixel */
png_byte spare_byte; /* to align the data, and for future use */ png_byte spare_byte; /* to align the data, and for future use */
png_byte signature[8]; /* magic bytes read by libpng from start of file */ png_byte signature[8]; /* magic bytes read by libpng from start of file */
@ -457,6 +465,8 @@ typedef struct png_info_struct
* and initialize the appropriate fields below. * and initialize the appropriate fields below.
*/ */
png_uint_32 free_me; /* flags items libpng is responsible for freeing */
#if defined(PNG_gAMA_SUPPORTED) || defined(PNG_READ_GAMMA_SUPPORTED) #if defined(PNG_gAMA_SUPPORTED) || defined(PNG_READ_GAMMA_SUPPORTED)
/* The gAMA chunk describes the gamma characteristics of the system /* The gAMA chunk describes the gamma characteristics of the system
* on which the image was created, normally in the range [1.0, 2.5]. * on which the image was created, normally in the range [1.0, 2.5].
@ -656,6 +666,7 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
#endif #endif
#if defined(PNG_INFO_IMAGE_SUPPORTED) #if defined(PNG_INFO_IMAGE_SUPPORTED)
/* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS) non-zero */
/* Data valid if (valid & PNG_INFO_IDAT) non-zero */ /* Data valid if (valid & PNG_INFO_IDAT) non-zero */
png_bytepp row_pointers; /* the image bits */ png_bytepp row_pointers; /* the image bits */
#endif #endif
@ -747,8 +758,7 @@ typedef png_info FAR * FAR * png_infopp;
#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */
#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */
#define PNG_ALLOCATED_INFO_PLTE 0x10000L /* GR-P, 1.0.6 */
/* This is used for the transformation routines, as some of them /* This is used for the transformation routines, as some of them
* change these values for the row. It also should enable using * change these values for the row. It also should enable using
@ -861,6 +871,7 @@ struct png_struct_def
png_uint_32 mode; /* tells us where we are in the PNG file */ png_uint_32 mode; /* tells us where we are in the PNG file */
png_uint_32 flags; /* flags indicating various things to libpng */ png_uint_32 flags; /* flags indicating various things to libpng */
png_uint_32 free_me; /* flags items libpng is responsible for freeing */
png_uint_32 transformations; /* which transformations to perform */ png_uint_32 transformations; /* which transformations to perform */
z_stream zstream; /* pointer to decompression structure (below) */ z_stream zstream; /* pointer to decompression structure (below) */
@ -1045,9 +1056,9 @@ struct png_struct_def
}; };
/* This prevents a compiler error in png_get_copyright() in png.c if png.c /* This prevents a compiler error in png_get_copyright() in png.c if png.c
and png.h are both at * version 1.0.5q and png.h are both at * version 1.0.5s
*/ */
typedef png_structp version_1_0_5q; typedef png_structp version_1_0_5s;
typedef png_struct FAR * FAR * png_structpp; typedef png_struct FAR * FAR * png_structpp;
@ -1577,6 +1588,23 @@ extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr,
/* frees a pointer allocated by png_malloc() */ /* frees a pointer allocated by png_malloc() */
extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr));
/* free data that was allocated internally */
extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 free_me, int num));
/* flags for png_ptr->free_me and info_ptr->free_me */
#define PNG_FREE_PLTE 0x0001
#define PNG_FREE_TRNS 0x0002
#define PNG_FREE_TEXT 0x0004
#define PNG_FREE_HIST 0x0008
#define PNG_FREE_ICCP 0x0010
#define PNG_FREE_SPLT 0x0020
#define PNG_FREE_ROWS 0x0040
#define PNG_FREE_PCAL 0x0080
#define PNG_FREE_SCAL 0x0100
#define PNG_FREE_UNKN 0x0200
#define PNG_FREE_LIST 0x0400
#define PNG_FREE_ALL 0x07ff
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr,
png_uint_32 size)); png_uint_32 size));
@ -1631,6 +1659,17 @@ png_infop info_ptr, png_uint_32 flag));
extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr, extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr,
png_infop info_ptr)); png_infop info_ptr));
#if defined(PNG_INFO_IMAGE_SUPPORTED)
/* Returns row_pointers, which is an array of pointers to scanlines that was
returned from png_read_png(). */
extern PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr,
png_infop info_ptr));
/* Set row_pointers, which is an array of pointers to scanlines for use
by png_write_png(). */
extern PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_bytepp row_pointers));
#endif
/* Returns number of color channels in image. */ /* Returns number of color channels in image. */
extern PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr, extern PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr,
png_infop info_ptr)); png_infop info_ptr));
@ -1796,11 +1835,6 @@ extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr,
int type, int nparams, png_charp units, png_charpp params)); int type, int nparams, png_charp units, png_charpp params));
#endif #endif
#if defined(PNG_pCAL_SUPPORTED)
extern PNG_EXPORT(void,png_free_pCAL) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif
#if defined(PNG_READ_pHYs_SUPPORTED) #if defined(PNG_READ_pHYs_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
@ -1849,26 +1883,16 @@ extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr,
extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr, extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_charp name, int compression_type, png_infop info_ptr, png_charp name, int compression_type,
png_charp profile, png_uint_32 proflen)); png_charp profile, png_uint_32 proflen));
extern PNG_EXPORT(void,png_free_iCCP) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif #endif
#if defined(PNG_READ_sPLT_SUPPORTED) #if defined(PNG_READ_sPLT_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_spalettes) PNGARG((png_structp png_ptr, extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_spalette_pp entries)); png_infop info_ptr, png_spalette_pp entries));
#endif #endif
#if defined(PNG_sPLT_SUPPORTED) #if defined(PNG_sPLT_SUPPORTED)
extern PNG_EXPORT(void,png_set_spalettes) PNGARG((png_structp png_ptr, extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_spalette_p entries, int nentries)); png_infop info_ptr, png_spalette_p entries, int nentries));
extern PNG_EXPORT(void,png_free_spalettes) PNGARG((png_structp png_ptr,
png_infop info_ptr, int num));
#endif
#if defined(PNG_READ_iTXt_SUPPORTED)
/* png_get_itxt also returns the number of text chunks in *num_text */
extern PNG_EXPORT(png_uint_32,png_get_itxt) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_textp *text_ptr, int *num_text));
#endif #endif
#if defined(PNG_TEXT_SUPPORTED) #if defined(PNG_TEXT_SUPPORTED)
@ -1886,8 +1910,6 @@ extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr,
#if defined(PNG_TEXT_SUPPORTED) #if defined(PNG_TEXT_SUPPORTED)
extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_textp text_ptr, int num_text)); png_infop info_ptr, png_textp text_ptr, int num_text));
extern PNG_EXPORT(void,png_free_text) PNGARG((png_structp png_ptr,
png_infop info_ptr, int num_text_old));
#endif #endif
#if defined(PNG_READ_tIME_SUPPORTED) #if defined(PNG_READ_tIME_SUPPORTED)
@ -1913,8 +1935,6 @@ extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr,
#endif #endif
#if defined(PNG_tRNS_SUPPORTED) #if defined(PNG_tRNS_SUPPORTED)
extern PNG_EXPORT(void,png_free_tRNS) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif #endif
#if defined(PNG_READ_sCAL_SUPPORTED) #if defined(PNG_READ_sCAL_SUPPORTED)
@ -1940,11 +1960,6 @@ extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
#endif #endif
#endif /* PNG_READ_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ #endif /* PNG_READ_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
extern PNG_EXPORT(void,png_free_sCAL) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif /* PNG_READ_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
/* provide a list of chunks and how they are to be handled, if the built-in /* provide a list of chunks and how they are to be handled, if the built-in
handling or default unknown chunk handling is not desired. Any chunks not handling or default unknown chunk handling is not desired. Any chunks not
@ -1959,11 +1974,8 @@ extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp
png_ptr, int keep, png_bytep chunk_list, int num_chunks)); png_ptr, int keep, png_bytep chunk_list, int num_chunks));
extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)); png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns));
extern PNG_EXPORT(void,png_free_unknown_chunks) PNGARG((png_structp png_ptr,
png_infop info_ptr, int num));
extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp
png_ptr, png_infop info_ptr, png_unknown_chunkpp entries)); png_ptr, png_infop info_ptr, png_unknown_chunkpp entries));
extern PNG_EXPORT(void,png_free_chunk_list) PNGARG((png_structp png_ptr));
#endif #endif
#if defined(PNG_INFO_IMAGE_SUPPORTED) #if defined(PNG_INFO_IMAGE_SUPPORTED)
@ -1975,8 +1987,6 @@ extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_infop info_ptr,
int transforms, int transforms,
voidp params)); voidp params));
extern PNG_EXPORT(void, png_free_pixels) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif #endif
/* Define PNG_DEBUG at compile time for debugging information. Higher /* Define PNG_DEBUG at compile time for debugging information. Higher
@ -2019,7 +2029,7 @@ extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr)
extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr)); extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
#define PNG_HEADER_VERSION_STRING \ #define PNG_HEADER_VERSION_STRING \
" libpng version 1.0.5q - February 5, 2000 (header)\n" " libpng version 1.0.5s - February 18, 2000 (header)\n"
#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
/* With these routines we avoid an integer divide, which will be slower on /* With these routines we avoid an integer divide, which will be slower on
@ -2136,11 +2146,8 @@ extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200
#define PNG_FLAG_CRC_CRITICAL_USE 0x0400 #define PNG_FLAG_CRC_CRITICAL_USE 0x0400
#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800
#define PNG_FLAG_FREE_PALETTE 0x1000 #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x1000
#define PNG_FLAG_FREE_TRANS 0x2000 #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x2000
#define PNG_FLAG_FREE_HIST 0x4000
#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L
#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L
/* For use in png_set_keep_unknown, png_handle_as_unknown */ /* For use in png_set_keep_unknown, png_handle_as_unknown */
#define HANDLE_CHUNK_AS_DEFAULT 0 #define HANDLE_CHUNK_AS_DEFAULT 0
@ -2415,14 +2422,6 @@ PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist,
int num_hist)); int num_hist));
#endif #endif
#if defined(PNG_hIST_SUPPORTED)
extern PNG_EXPORT(void,png_free_hIST) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif
extern PNG_EXPORT(void,png_free_PLTE) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,

27
pngasmrd.h
View File

@ -1,6 +1,6 @@
/* pngasmrd.h - assembler version of utilities to read a PNG file /* pngasmrd.h - assembler version of utilities to read a PNG file
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1999, 2000 Glenn Randers-Pehrson * Copyright (c) 1999, 2000 Glenn Randers-Pehrson
* *
@ -9,24 +9,27 @@
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
/* Set this in the makefile for VC++ on Pentium, not in pngconf.h */ /* Set this in the makefile for VC++ on Pentium, not in pngconf.h */
#ifdef PNG_USE_PNGVCRD
/* Platform must be Pentium. Makefile must assemble and load pngvcrd.c . /* Platform must be Pentium. Makefile must assemble and load pngvcrd.c .
* MMX will be detected at run time and used if present. * MMX will be detected at run time and used if present.
*/ */
#define PNG_HAVE_ASSEMBLER_COMBINE_ROW #ifdef PNG_USE_PNGVCRD
#define PNG_HAVE_ASSEMBLER_READ_INTERLACE # define PNG_HAVE_ASSEMBLER_COMBINE_ROW
#define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW # define PNG_HAVE_ASSEMBLER_READ_INTERLACE
# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
#endif #endif
/* Set this in the makefile for gcc on Pentium, not in pngconf.h */ /* Set this in the makefile for gcc/as on Pentium, not in pngconf.h */
#ifdef PNG_USE_PNGGCCRD /* Platform must be Pentium. Makefile must assemble and load pnggccrd.c .
/* Platform must be Pentium. Makefile must assemble and load pnggccrd.c
* (not available in libpng 1.0.5q).
* MMX will be detected at run time and used if present. * MMX will be detected at run time and used if present.
*/ */
#define PNG_HAVE_ASSEMBLER_COMBINE_ROW #ifdef PNG_USE_PNGGCCRD
#define PNG_HAVE_ASSEMBLER_READ_INTERLACE # define PNG_HAVE_ASSEMBLER_COMBINE_ROW
#define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW # define PNG_HAVE_ASSEMBLER_READ_INTERLACE
# define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
#endif #endif
/*
GRR notes:
- see pnggccrd.c for info about what is currently enabled
*/
#endif #endif

25
pngconf.h
View File

@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng /* pngconf.h - machine configurable file for libpng
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -423,7 +423,8 @@
#define PNG_EASY_ACCESS_SUPPORTED #define PNG_EASY_ACCESS_SUPPORTED
#endif #endif
#ifndef PNG_NO_ASSEMBLER_CODE #if defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD) && \
!defined(PNG_NO_ASSEMBLER_CODE)
#define PNG_ASSEMBLER_CODE_SUPPORTED #define PNG_ASSEMBLER_CODE_SUPPORTED
#endif #endif
@ -711,7 +712,7 @@
#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */ #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
/* Turn this off to disable png_read_png() and /* Turn this off to disable png_read_png() and
* png_write_png() and leave the image_bits member * png_write_png() and leave the row_pointers member
* out of the info structure. * out of the info structure.
*/ */
#ifndef PNG_NO_INFO_IMAGE #ifndef PNG_NO_INFO_IMAGE
@ -847,8 +848,13 @@ typedef z_stream FAR * png_zstreamp;
#ifndef PNG_EXPORT #ifndef PNG_EXPORT
/* allow for compilation as dll under MS Windows */ /* GRR 20000206: based on zconf.h and MSVC 5.0 docs */
# ifdef __WIN32DLL__ # if defined(_MSC_VER) && defined(_DLL)
# define PNG_EXPORT(type,symbol) type __declspec(dllexport) symbol
# endif
/* allow for compilation as a DLL under MS Windows */
# ifdef __WIN32DLL__ /* Borland? */
# define PNG_EXPORT(type,symbol) __declspec(dllexport) type symbol # define PNG_EXPORT(type,symbol) __declspec(dllexport) type symbol
# endif # endif
@ -857,7 +863,7 @@ typedef z_stream FAR * png_zstreamp;
# define PNG_EXPORT(type,symbol) type __attribute__((dllexport)) symbol # define PNG_EXPORT(type,symbol) type __attribute__((dllexport)) symbol
# endif # endif
/* allow for compilation as dll with Borland C++ 5.0 */ /* allow for compilation as a DLL with Borland C++ 5.0 */
# if defined(__BORLANDC__) && defined(_Windows) && defined(__DLL__) # if defined(__BORLANDC__) && defined(_Windows) && defined(__DLL__)
# define PNG_EXPORT(type,symbol) type _export symbol # define PNG_EXPORT(type,symbol) type _export symbol
# endif # endif
@ -877,6 +883,9 @@ typedef z_stream FAR * png_zstreamp;
#endif #endif
#ifndef PNG_EXPORT_VAR #ifndef PNG_EXPORT_VAR
# if defined(_MSC_VER) && defined(_DLL) /* GRR 20000206 */
# define PNG_EXPORT_VAR(type) extern type __declspec(dllexport)
# endif
# ifdef PNG_DECL_DLLEXP # ifdef PNG_DECL_DLLEXP
# define PNG_EXPORT_VAR(type) extern __declspec(dllexport) type # define PNG_EXPORT_VAR(type) extern __declspec(dllexport) type
# endif # endif
@ -903,6 +912,10 @@ typedef z_stream FAR * png_zstreamp;
# define PNG_ABORT() abort() # define PNG_ABORT() abort()
#endif #endif
#ifdef PNG_SETJMP_SUPPORTED
# define png_jmp_env(png_ptr) png_ptr->jmpbuf
#endif
#if defined(USE_FAR_KEYWORD) /* memory model independent fns */ #if defined(USE_FAR_KEYWORD) /* memory model independent fns */
/* use this to make far-to-near assignments */ /* use this to make far-to-near assignments */
# define CHECK 1 # define CHECK 1

4
pngerror.c
View File

@ -1,7 +1,7 @@
/* pngerror.c - stub functions for i/o and memory allocation /* pngerror.c - stub functions for i/o and memory allocation
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -133,6 +133,8 @@ png_default_error(png_structp png_ptr, png_const_charp message)
longjmp(png_ptr->jmpbuf, 1); longjmp(png_ptr->jmpbuf, 1);
# endif # endif
#else #else
if (png_ptr == NULL)
/* make compiler happy */ ;
PNG_ABORT(); PNG_ABORT();
#endif #endif
} }

2
pnggccrd.c
View File

@ -6,7 +6,7 @@
* and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm * and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm
* for Intel's performance analysis of the MMX vs. non-MMX code. * for Intel's performance analysis of the MMX vs. non-MMX code.
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998, Intel Corporation * Copyright (c) 1998, Intel Corporation
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson

31
pngget.c
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@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct /* pngget.c - retrieval of values from info struct
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -29,6 +29,17 @@ png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
return(0); return(0);
} }
#if defined(PNG_INFO_IMAGE_SUPPORTED)
png_bytepp
png_get_rows(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->row_pointers);
else
return(0);
}
#endif
#ifdef PNG_EASY_ACCESS_SUPPORTED #ifdef PNG_EASY_ACCESS_SUPPORTED
/* easy access to info, added in libpng-0.99 */ /* easy access to info, added in libpng-0.99 */
png_uint_32 png_uint_32
@ -239,35 +250,35 @@ png_uint_32
png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{ {
return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
*.03937 +.5) *.0254 +.5);
} }
png_uint_32 png_uint_32
png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{ {
return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
*.03937 +.5) *.0254 +.5);
} }
png_uint_32 png_uint_32
png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{ {
return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
*.03937 +.5) *.0254 +.5);
} }
float float
png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
{ {
return ((float)png_get_x_offset_microns(png_ptr, info_ptr) return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
*.03937/1000000. +.5) *.00003937);
} }
float float
png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
{ {
return ((float)png_get_y_offset_microns(png_ptr, info_ptr) return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
*.03937/1000000. +.5) *.00003937)
} }
#if defined(PNG_READ_pHYs_SUPPORTED) #if defined(PNG_READ_pHYs_SUPPORTED)
@ -296,8 +307,8 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
retval |= PNG_INFO_pHYs; retval |= PNG_INFO_pHYs;
if(unit_type == 1) if(unit_type == 1)
{ {
if (res_x != NULL) *res_x = (png_uint_32)(*res_x * 39.37 + .50); if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
if (res_y != NULL) *res_y = (png_uint_32)(*res_y * 39.37 + .50); if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
} }
} }
} }
@ -477,7 +488,7 @@ png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
#if defined(PNG_READ_sPLT_SUPPORTED) #if defined(PNG_READ_sPLT_SUPPORTED)
png_uint_32 png_uint_32
png_get_spalettes(png_structp png_ptr, png_infop info_ptr, png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
png_spalette_pp spalettes) png_spalette_pp spalettes)
{ {
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
@ -703,6 +714,8 @@ png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
*num_text = info_ptr->num_text; *num_text = info_ptr->num_text;
return ((png_uint_32)info_ptr->num_text); return ((png_uint_32)info_ptr->num_text);
} }
if (num_text != NULL)
*num_text = 0;
return(0); return(0);
} }
#endif #endif

2
pngmem.c
View File

@ -1,7 +1,7 @@
/* pngmem.c - stub functions for memory allocation /* pngmem.c - stub functions for memory allocation
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

2
pngpread.c
View File

@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode /* pngpread.c - read a png file in push mode
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

29
pngread.c
View File

@ -1,7 +1,7 @@
/* pngread.c - read a PNG file /* pngread.c - read a PNG file
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -641,7 +641,7 @@ 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 * not called png_set_interlace_handling(), the display_row buffer will
* be ignored, so pass NULL to it. * be ignored, so pass NULL to it.
* *
* [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5q. * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5s.
*/ */
void void
@ -690,7 +690,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
* only call this function once. If you desire to have an image for * only call this function once. If you desire to have an image for
* each pass of a interlaced image, use png_read_rows() instead. * each pass of a interlaced image, use png_read_rows() instead.
* *
* [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5q. * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5s.
*/ */
void void
png_read_image(png_structp png_ptr, png_bytepp image) png_read_image(png_structp png_ptr, png_bytepp image)
@ -943,7 +943,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
if (info_ptr != NULL) if (info_ptr != NULL)
{ {
#if defined(PNG_TEXT_SUPPORTED) #if defined(PNG_TEXT_SUPPORTED)
png_free(png_ptr, info_ptr->text); png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
#endif #endif
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
@ -957,7 +957,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
if (end_info_ptr != NULL) if (end_info_ptr != NULL)
{ {
#if defined(PNG_READ_TEXT_SUPPORTED) #if defined(PNG_READ_TEXT_SUPPORTED)
png_free(png_ptr, end_info_ptr->text); png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
#endif #endif
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)end_info_ptr, free_fn); png_destroy_struct_2((png_voidp)end_info_ptr, free_fn);
@ -1014,16 +1014,19 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
png_free(png_ptr, png_ptr->gamma_from_1); png_free(png_ptr, png_ptr->gamma_from_1);
png_free(png_ptr, png_ptr->gamma_to_1); png_free(png_ptr, png_ptr->gamma_to_1);
#endif #endif
if (png_ptr->flags & PNG_FLAG_FREE_PALETTE) if (png_ptr->free_me & PNG_FREE_PLTE)
png_zfree(png_ptr, png_ptr->palette); png_zfree(png_ptr, png_ptr->palette);
png_ptr->free_me &= ~PNG_FREE_PLTE;
#if defined(PNG_tRNS_SUPPORTED) || \ #if defined(PNG_tRNS_SUPPORTED) || \
defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
if (png_ptr->flags & PNG_FLAG_FREE_TRANS) if (png_ptr->free_me & PNG_FREE_TRNS)
png_free(png_ptr, png_ptr->trans); png_free(png_ptr, png_ptr->trans);
png_ptr->free_me &= ~PNG_FREE_TRNS;
#endif #endif
#if defined(PNG_READ_hIST_SUPPORTED) #if defined(PNG_READ_hIST_SUPPORTED)
if (png_ptr->flags & PNG_FLAG_FREE_HIST) if (png_ptr->free_me & PNG_FREE_HIST)
png_free(png_ptr, png_ptr->hist); png_free(png_ptr, png_ptr->hist);
png_ptr->free_me &= ~PNG_FREE_HIST;
#endif #endif
#if defined(PNG_READ_GAMMA_SUPPORTED) #if defined(PNG_READ_GAMMA_SUPPORTED)
if (png_ptr->gamma_16_table != NULL) if (png_ptr->gamma_16_table != NULL)
@ -1140,7 +1143,7 @@ void png_read_png(png_structp png_ptr, png_infop info_ptr,
png_set_strip_alpha(png_ptr); png_set_strip_alpha(png_ptr);
#endif #endif
#if defined(PNG_READ_PACK_SUPPORTED) #if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED)
/* Extract multiple pixels with bit depths of 1, 2, and 4 from a single /* Extract multiple pixels with bit depths of 1, 2, and 4 from a single
* byte into separate bytes (useful for paletted and grayscale images). * byte into separate bytes (useful for paletted and grayscale images).
*/ */
@ -1162,7 +1165,9 @@ void png_read_png(png_structp png_ptr, png_infop info_ptr,
* channels so the data will be available as RGBA quartets. * channels so the data will be available as RGBA quartets.
*/ */
if (transforms & PNG_TRANSFORM_EXPAND) if (transforms & PNG_TRANSFORM_EXPAND)
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) if ((png_ptr->bit_depth < 8) ||
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
png_set_expand(png_ptr); png_set_expand(png_ptr);
#endif #endif
@ -1217,8 +1222,12 @@ void png_read_png(png_structp png_ptr, png_infop info_ptr,
/* -------------- image transformations end here ------------------- */ /* -------------- image transformations end here ------------------- */
if(info_ptr->row_pointers == NULL)
{
info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr, info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
info_ptr->height * sizeof(png_bytep)); info_ptr->height * sizeof(png_bytep));
info_ptr->free_me |= PNG_FREE_ROWS;
}
for (row = 0; row < (int)info_ptr->height; row++) for (row = 0; row < (int)info_ptr->height; row++)
info_ptr->row_pointers[row] = png_malloc(png_ptr, info_ptr->row_pointers[row] = png_malloc(png_ptr,
png_get_rowbytes(png_ptr, info_ptr)); png_get_rowbytes(png_ptr, info_ptr));

2
pngrio.c
View File

@ -1,7 +1,7 @@
/* pngrio.c - functions for data input /* pngrio.c - functions for data input
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

5
pngrtran.c
View File

@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers /* pngrtran.c - transforms the data in a row for PNG readers
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -658,7 +658,8 @@ png_init_read_transformations(png_structp png_ptr)
#endif #endif
#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) #if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED)
if (png_ptr->transformations & PNG_BACKGROUND_EXPAND) 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 */ if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */
{ {

24
pngrutil.c
View File

@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file /* pngrutil.c - utilities to read a PNG file
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -14,10 +14,6 @@
#define PNG_INTERNAL #define PNG_INTERNAL
#include "png.h" #include "png.h"
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
#include "pngasmrd.h"
#endif
#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */ /* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
png_uint_32 png_uint_32
@ -398,7 +394,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
num = (int)length / 3; num = (int)length / 3;
palette = (png_colorp)png_zalloc(png_ptr, (uInt)num, sizeof (png_color)); palette = (png_colorp)png_zalloc(png_ptr, (uInt)num, sizeof (png_color));
png_ptr->flags |= PNG_FLAG_FREE_PALETTE; png_ptr->free_me |= PNG_FREE_PLTE;
for (i = 0; i < num; i++) for (i = 0; i < num; i++)
{ {
png_byte buf[3]; png_byte buf[3];
@ -436,7 +432,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
else else
{ {
png_chunk_warning(png_ptr, "CRC error"); png_chunk_warning(png_ptr, "CRC error");
png_ptr->flags &= ~PNG_FLAG_FREE_PALETTE; png_ptr->free_me &= ~PNG_FREE_PLTE;
png_zfree(png_ptr, palette); png_zfree(png_ptr, palette);
return; return;
} }
@ -928,6 +924,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif #endif
chunkdata = (png_charp)png_malloc(png_ptr, length + 1); chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->free_me |= PNG_FREE_ICCP;
slength = (png_size_t)length; slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunkdata, slength); png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
@ -1058,7 +1055,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* discard all chunk data except the name and stash that */ /* discard all chunk data except the name and stash that */
new_palette.name = (png_charp)chunkdata; new_palette.name = (png_charp)chunkdata;
png_set_spalettes(png_ptr, info_ptr, &new_palette, 1); png_set_sPLT(png_ptr, info_ptr, &new_palette, 1);
png_free(png_ptr, chunkdata); png_free(png_ptr, chunkdata);
png_free(png_ptr, new_palette.entries); png_free(png_ptr, new_palette.entries);
@ -1107,7 +1104,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
} }
png_ptr->trans = (png_bytep)png_malloc(png_ptr, length); png_ptr->trans = (png_bytep)png_malloc(png_ptr, length);
png_ptr->flags |= PNG_FLAG_FREE_TRANS; png_ptr->free_me |= PNG_FREE_TRNS;
png_crc_read(png_ptr, png_ptr->trans, (png_size_t)length); png_crc_read(png_ptr, png_ptr->trans, (png_size_t)length);
png_ptr->num_trans = (png_uint_16)length; png_ptr->num_trans = (png_uint_16)length;
} }
@ -1287,7 +1284,7 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
num = (int)length / 2 ; num = (int)length / 2 ;
png_ptr->hist = (png_uint_16p)png_malloc(png_ptr, png_ptr->hist = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(num * sizeof (png_uint_16))); (png_uint_32)(num * sizeof (png_uint_16)));
png_ptr->flags |= PNG_FLAG_FREE_HIST; png_ptr->free_me |= PNG_FREE_HIST;
for (i = 0; i < num; i++) for (i = 0; i < num; i++)
{ {
png_byte buf[2]; png_byte buf[2];
@ -2802,7 +2799,14 @@ png_read_start_row(png_structp png_ptr)
else else
{ {
if (max_pixel_depth <= 8) if (max_pixel_depth <= 8)
{
if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
max_pixel_depth = 32;
else
max_pixel_depth = 24; max_pixel_depth = 24;
}
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
max_pixel_depth = 64;
else else
max_pixel_depth = 48; max_pixel_depth = 48;
} }

43
pngset.c
View File

@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct /* pngset.c - storage of image information into info struct
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -135,9 +135,7 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
info_ptr->hist = png_malloc(png_ptr, sizeof(png_uint_16) * info_ptr->hist = hist;
info_ptr->num_palette);
png_memcpy(info_ptr->hist, hist, sizeof(png_uint_16) * info_ptr->num_palette);
info_ptr->valid |= PNG_INFO_hIST; info_ptr->valid |= PNG_INFO_hIST;
} }
#endif #endif
@ -309,7 +307,6 @@ void
png_set_PLTE(png_structp png_ptr, png_infop info_ptr, png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_colorp palette, int num_palette) png_colorp palette, int num_palette)
{ {
png_size_t length = (png_size_t)(3*num_palette);
png_debug1(1, "in %s storage function\n", "PLTE"); png_debug1(1, "in %s storage function\n", "PLTE");
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
@ -317,13 +314,10 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_debug1(3, "allocating PLTE for info (%d bytes)\n", length); png_debug1(3, "allocating PLTE for info (%d bytes)\n", length);
info_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)num_palette, info_ptr->palette = palette;
sizeof (png_color));
png_memcpy(info_ptr->palette, palette, length);
info_ptr->num_palette = (png_uint_16)num_palette; info_ptr->num_palette = (png_uint_16)num_palette;
info_ptr->valid |= (PNG_INFO_PLTE|PNG_ALLOCATED_INFO_PLTE); info_ptr->valid |= PNG_INFO_PLTE;
} }
#if defined(PNG_sBIT_SUPPORTED) #if defined(PNG_sBIT_SUPPORTED)
@ -441,6 +435,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
/* Compression is always zero but is here so the API and info structure /* Compression is always zero but is here so the API and info structure
* does not have to change * if we introduce multiple compression types */ * does not have to change * if we introduce multiple compression types */
info_ptr->iccp_compression = (png_byte)compression_type; info_ptr->iccp_compression = (png_byte)compression_type;
info_ptr->free_me |= PNG_FREE_ICCP;
info_ptr->valid |= PNG_INFO_iCCP; info_ptr->valid |= PNG_INFO_iCCP;
} }
#endif #endif
@ -526,8 +521,6 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
textp->key = (png_charp)png_malloc(png_ptr, textp->key = (png_charp)png_malloc(png_ptr,
(png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4)); (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4));
/* Caution: the calling program, not libpng, is responsible for
freeing this, if libpng wasn't the caller. */
png_debug2(2, "Allocated %d bytes at %x in png_set_text\n", png_debug2(2, "Allocated %d bytes at %x in png_set_text\n",
key_len + lang_len + lang_key_len + text_length + 4, textp->key); key_len + lang_len + lang_key_len + text_length + 4, textp->key);
@ -573,6 +566,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
info_ptr->text[info_ptr->num_text]= *textp; info_ptr->text[info_ptr->num_text]= *textp;
info_ptr->num_text++; info_ptr->num_text++;
info_ptr->free_me |= PNG_FREE_TEXT;
png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
} }
} }
@ -602,10 +596,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
return; return;
if (trans != NULL) if (trans != NULL)
{ info_ptr->trans = trans;
info_ptr->trans = png_malloc(png_ptr, num_trans);
png_memcpy(info_ptr->trans, trans, num_trans);
}
if (trans_values != NULL) if (trans_values != NULL)
{ {
@ -621,7 +612,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
#if defined(PNG_sPLT_SUPPORTED) #if defined(PNG_sPLT_SUPPORTED)
void void
png_set_spalettes(png_structp png_ptr, png_set_sPLT(png_structp png_ptr,
png_infop info_ptr, png_spalette_p entries, int nentries) png_infop info_ptr, png_spalette_p entries, int nentries)
{ {
png_spalette_p np; png_spalette_p np;
@ -653,6 +644,7 @@ png_set_spalettes(png_structp png_ptr,
info_ptr->splt_palettes = np; info_ptr->splt_palettes = np;
info_ptr->splt_palettes_num += nentries; info_ptr->splt_palettes_num += nentries;
info_ptr->valid |= PNG_INFO_sPLT; info_ptr->valid |= PNG_INFO_sPLT;
info_ptr->free_me |= PNG_FREE_SPLT;
} }
#endif /* PNG_sPLT_SUPPORTED */ #endif /* PNG_sPLT_SUPPORTED */
@ -691,6 +683,7 @@ png_set_unknown_chunks(png_structp png_ptr,
info_ptr->unknown_chunks = np; info_ptr->unknown_chunks = np;
info_ptr->unknown_chunks_num += num_unknowns; info_ptr->unknown_chunks_num += num_unknowns;
info_ptr->free_me |= PNG_FREE_UNKN;
} }
#endif #endif
@ -732,13 +725,14 @@ png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
if(png_ptr->chunk_list != (png_bytep)NULL) if(png_ptr->chunk_list != (png_bytep)NULL)
{ {
png_memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); png_memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks);
png_free_chunk_list(png_ptr); png_free(png_ptr, png_ptr->chunk_list);
} }
png_memcpy(new_list+5*old_num_chunks, chunk_list, 5*num_chunks); png_memcpy(new_list+5*old_num_chunks, chunk_list, 5*num_chunks);
for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5) for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
*p=(png_byte)keep; *p=(png_byte)keep;
png_ptr->num_chunk_list=old_num_chunks+num_chunks; png_ptr->num_chunk_list=old_num_chunks+num_chunks;
png_ptr->chunk_list=new_list; png_ptr->chunk_list=new_list;
png_ptr->free_me |= PNG_FREE_LIST;
} }
#endif #endif
@ -753,3 +747,16 @@ png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
} }
#endif #endif
#if defined(PNG_INFO_IMAGE_SUPPORTED)
void
png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
{
png_debug1(1, "in %s storage function\n", "rows");
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->row_pointers = row_pointers;
info_ptr->free_me |= PNG_FREE_ROWS;
}
#endif

28
pngtest.c
View File

@ -1,7 +1,7 @@
/* pngtest.c - a simple test program to test libpng /* pngtest.c - a simple test program to test libpng
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -524,7 +524,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
int bit_depth, color_type; int bit_depth, color_type;
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
jmp_buf jmpbuf; jmp_buf jmp_env;
#endif #endif
#endif #endif
@ -579,11 +579,11 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
#endif #endif
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
png_debug(0, "Setting jmpbuf for read struct\n"); png_debug(0, "Setting jmp_env for read struct\n");
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf)) if (setjmp(jmp_env))
#else #else
if (setjmp(read_ptr->jmpbuf)) if (setjmp(png_jmp_env(read_ptr)))
#endif #endif
{ {
fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname); fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
@ -595,14 +595,14 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
return (1); return (1);
} }
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
png_memcpy(read_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf)); png_memcpy(png_jmp_env(read_ptr),jmp_env,sizeof(jmp_buf));
#endif #endif
png_debug(0, "Setting jmpbuf for write struct\n"); png_debug(0, "Setting jmp_env for write struct\n");
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf)) if (setjmp(jmp_env))
#else #else
if (setjmp(write_ptr->jmpbuf)) if (setjmp(png_jmp_env(write_ptr)))
#endif #endif
{ {
fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname); fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
@ -614,7 +614,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
return (1); return (1);
} }
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
png_memcpy(write_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf)); png_memcpy(write_ptr->jmpbuf,jmp_env,sizeof(jmp_buf));
#endif #endif
#endif #endif
@ -949,10 +949,10 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
} }
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
png_free_unknown_chunks(read_ptr, end_info_ptr, -1); png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
#endif #endif
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
png_free_unknown_chunks(write_ptr, write_info_ptr, -1); png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
#endif #endif
png_debug(0, "Reading and writing end_info data\n"); png_debug(0, "Reading and writing end_info data\n");
@ -1341,7 +1341,7 @@ main(int argc, char *argv[])
/* Generate a compiler error if there is an old png.h in the search path. */ /* Generate a compiler error if there is an old png.h in the search path. */
void void
png_check_pngtest_version png_check_pngtest_version
(version_1_0_5q png_h_is_not_version_1_0_5q) (version_1_0_5s png_h_is_not_version_1_0_5s)
{ {
if(png_h_is_not_version_1_0_5q == NULL) return; if(png_h_is_not_version_1_0_5s == NULL) return;
} }

2
pngtrans.c
View File

@ -1,7 +1,7 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers) /* pngtrans.c - transforms the data in a row (used by both readers and writers)
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

2
pngtypes.h
View File

@ -1,6 +1,6 @@
/* pngtypes.h - array of chunk-types for libpng /* pngtypes.h - array of chunk-types for libpng
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

2
pngvcrd.c
View File

@ -2,7 +2,7 @@
* *
* For Intel x86 CPU and Microsoft Visual C++ compiler * For Intel x86 CPU and Microsoft Visual C++ compiler
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998, Intel Corporation * Copyright (c) 1998, Intel Corporation
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson

2
pngwio.c
View File

@ -1,7 +1,7 @@
/* pngwio.c - functions for data output /* pngwio.c - functions for data output
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

38
pngwrite.c
View File

@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file /* pngwrite.c - general routines to write a PNG file
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger
@ -799,35 +799,13 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
if (info_ptr != NULL) if (info_ptr != NULL)
{ {
#if defined(PNG_WRITE_TEXT_SUPPORTED) png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
png_free_text(png_ptr, info_ptr, -1);
#endif if (png_ptr->num_chunk_list)
#if defined(PNG_WRITE_tRNS_SUPPORTED) {
png_free_tRNS(png_ptr, info_ptr); png_free(png_ptr, png_ptr->chunk_list);
#endif png_ptr->num_chunk_list=0;
#if defined(PNG_WRITE_sCAL_SUPPORTED) }
png_free_sCAL(png_ptr, info_ptr);
#endif
#if defined(PNG_WRITE_pCAL_SUPPORTED)
png_free_pCAL(png_ptr, info_ptr);
#endif
#if defined(PNG_WRITE_iCCP_SUPPORTED)
png_free_iCCP(png_ptr, info_ptr);
#endif
#if defined(PNG_WRITE_sPLT_SUPPORTED)
png_free_spalettes(png_ptr, info_ptr, -1);
#endif
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
png_free_unknown_chunks(png_ptr, info_ptr, -1);
png_free_chunk_list(png_ptr);
#endif
#if defined(PNG_hIST_SUPPORTED)
png_free_hIST(png_ptr, info_ptr);
#endif
png_free_PLTE(png_ptr, info_ptr);
#if defined(PNG_INFO_IMAGE_SUPPORTED)
png_free_pixels(png_ptr, info_ptr);
#endif
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)info_ptr, free_fn); png_destroy_struct_2((png_voidp)info_ptr, free_fn);

2
pngwtran.c
View File

@ -1,7 +1,7 @@
/* pngwtran.c - transforms the data in a row for PNG writers /* pngwtran.c - transforms the data in a row for PNG writers
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

2
pngwutil.c
View File

@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file /* pngwutil.c - utilities to write a PNG file
* *
* libpng 1.0.5q - February 5, 2000 * libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996, 1997 Andreas Dilger

2
scripts/makefile.beos
View File

@ -31,7 +31,7 @@ RANLIB=ranlib
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not # read libpng.txt or png.h to see why PNGMAJ is 2. You should not
# have to change it. # have to change it.
PNGMAJ = 2 PNGMAJ = 2
PNGMIN = 1.0.5q PNGMIN = 1.0.5s
PNGVER = $(PNGMAJ).$(PNGMIN) PNGVER = $(PNGMAJ).$(PNGMIN)
# where make install puts libpng.a, libpng.so*, and png.h # where make install puts libpng.a, libpng.so*, and png.h

2
scripts/makefile.dec
View File

@ -14,7 +14,7 @@ ZLIBINC=../zlib
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not # read libpng.txt or png.h to see why PNGMAJ is 2. You should not
# have to change it. # have to change it.
PNGMAJ = 2 PNGMAJ = 2
PNGMIN = 1.0.5q PNGMIN = 1.0.5s
PNGVER = $(PNGMAJ).$(PNGMIN) PNGVER = $(PNGMAJ).$(PNGMIN)
CC=cc CC=cc

9
scripts/makefile.gcmmx
View File

@ -24,8 +24,8 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
# for pgcc version 2.95.1, -O3 is buggy; don't use it. # for pgcc version 2.95.1, -O3 is buggy; don't use it.
CFLAGS=-DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 $(ALIGN) \ CFLAGS=-DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 $(ALIGN) -funroll-loops \
-funroll-loops -fomit-frame-pointer # $(WARNMORE) -g -DPNG_DEBUG=5 -fomit-frame-pointer # $(WARNMORE) -g -DPNG_DEBUG=5
LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz -lm LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz -lm
RANLIB=ranlib RANLIB=ranlib
@ -34,7 +34,7 @@ RANLIB=ranlib
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not # read libpng.txt or png.h to see why PNGMAJ is 2. You should not
# have to change it. # have to change it.
PNGMAJ = 2 PNGMAJ = 2
PNGMIN = 1.0.5q PNGMIN = 1.0.5s
PNGVER = $(PNGMAJ).$(PNGMIN) PNGVER = $(PNGMAJ).$(PNGMIN)
INCPATH=$(prefix)/include INCPATH=$(prefix)/include
@ -74,7 +74,8 @@ test: pngtest
./pngtest ./pngtest
install: libpng.a libpng.so.$(PNGVER) install: libpng.a libpng.so.$(PNGVER)
-@mkdir $(INCPATH) $(LIBPATH) -@if [ ! -d $(INCPATH) ]; then mkdir $(INCPATH); fi
-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
cp png.h pngconf.h $(INCPATH) cp png.h pngconf.h $(INCPATH)
chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h
cp libpng.a libpng.so.$(PNGVER) $(LIBPATH) cp libpng.a libpng.so.$(PNGVER) $(LIBPATH)

5
scripts/makefile.linux
View File

@ -34,7 +34,7 @@ RANLIB=ranlib
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not # read libpng.txt or png.h to see why PNGMAJ is 2. You should not
# have to change it. # have to change it.
PNGMAJ = 2 PNGMAJ = 2
PNGMIN = 1.0.5q PNGMIN = 1.0.5s
PNGVER = $(PNGMAJ).$(PNGMIN) PNGVER = $(PNGMAJ).$(PNGMIN)
INCPATH=$(prefix)/include INCPATH=$(prefix)/include
@ -74,7 +74,8 @@ test: pngtest
./pngtest ./pngtest
install: libpng.a libpng.so.$(PNGVER) install: libpng.a libpng.so.$(PNGVER)
-@mkdir $(INCPATH) $(LIBPATH) -@if [ ! -d $(INCPATH) ]; then mkdir $(INCPATH); fi
-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
cp png.h pngconf.h $(INCPATH) cp png.h pngconf.h $(INCPATH)
chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h
cp libpng.a libpng.so.$(PNGVER) $(LIBPATH) cp libpng.a libpng.so.$(PNGVER) $(LIBPATH)

2
scripts/makefile.sco
View File

@ -25,7 +25,7 @@ RANLIB=echo
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not # read libpng.txt or png.h to see why PNGMAJ is 2. You should not
# have to change it. # have to change it.
PNGMAJ = 2 PNGMAJ = 2
PNGMIN = 1.0.5q PNGMIN = 1.0.5s
PNGVER = $(PNGMAJ).$(PNGMIN) PNGVER = $(PNGMAJ).$(PNGMIN)
INCPATH=$(prefix)/include INCPATH=$(prefix)/include

2
scripts/makefile.solaris
View File

@ -31,7 +31,7 @@ RANLIB=echo
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not # read libpng.txt or png.h to see why PNGMAJ is 2. You should not
# have to change it. # have to change it.
PNGMAJ = 2 PNGMAJ = 2
PNGMIN = 1.0.5q PNGMIN = 1.0.5s
PNGVER = $(PNGMAJ).$(PNGMIN) PNGVER = $(PNGMAJ).$(PNGMIN)
INCPATH=$(prefix)/include INCPATH=$(prefix)/include

41
scripts/pngdef.pas
View File

@ -363,6 +363,9 @@ function png_get_rgb_to_gray_status(png_ptr: png_structp);
function png_get_rowbytes(png_ptr: png_structp; info_ptr: png_infop): function png_get_rowbytes(png_ptr: png_structp; info_ptr: png_infop):
png_uint_32; png_uint_32;
stdcall; stdcall;
function png_get_rows(png_ptr: png_structp; info_ptr: png_infop):
png_bytepp;
stdcall;
function png_get_sBIT(png_ptr: png_structp; info_ptr: png_infop; function png_get_sBIT(png_ptr: png_structp; info_ptr: png_infop;
var sig_bits: png_color_8p): png_uint_32; var sig_bits: png_color_8p): png_uint_32;
stdcall; stdcall;
@ -539,6 +542,9 @@ procedure png_set_read_user_transform_fn(png_ptr: png_structp;
stdcall; stdcall;
procedure png_set_rgb_to_gray(png_ptr: png_structp; int: error_action); procedure png_set_rgb_to_gray(png_ptr: png_structp; int: error_action);
stdcall; stdcall;
procedure png_set_rows(png_ptr: png_structp; info_ptr: png_infop;
row_pointers: png_bytepp);
stdcall;
procedure png_set_sBIT(png_ptr: png_structp; info_ptr: png_infop; procedure png_set_sBIT(png_ptr: png_structp; info_ptr: png_infop;
sig_bits: png_color_8p); sig_bits: png_color_8p);
stdcall; stdcall;
@ -617,32 +623,18 @@ procedure png_get_iCCP(png_ptr: png_structp; info_ptr: png_infop;
name: png_charpp; compression_type: int *; profile: png_charpp; name: png_charpp; compression_type: int *; profile: png_charpp;
proflen: png_int_32): png_bytep; proflen: png_int_32): png_bytep;
stdcall; stdcall;
procedure png_get_spalettes(png_ptr: png_structp; procedure png_get_sPLT(png_ptr: png_structp;
info_ptr: png_infop; entries: png_spalette_pp): png_uint_32; info_ptr: png_infop; entries: png_spalette_pp): png_uint_32;
stdcall; stdcall;
procedure png_free_pCAL(png_ptr: png_structp; info_ptr: png_infop);
stdcall;
procedure png_free_sCAL(png_ptr: png_structp; info_ptr: png_infop);
stdcall;
procedure png_set_iCCP(png_ptr: png_structp; info_ptr: png_infop; procedure png_set_iCCP(png_ptr: png_structp; info_ptr: png_infop;
name: png_charp; compression_type: int; profile: png_charp; name: png_charp; compression_type: int; profile: png_charp;
proflen: int); proflen: int);
stdcall; stdcall;
procedure png_free_hIST(png_ptr: png_structp; info_ptr: png_infop); procedure png_free_data(png_ptr: png_structp; info_ptr: png_infop; num: int);
stdcall; stdcall;
procedure png_free_iCCP(png_ptr: png_structp; info_ptr: png_infop); procedure png_set_sPLT(png_ptr: png_structp; info_ptr: png_infop;
stdcall;
procedure png_free_PLTE(png_ptr: png_structp; info_ptr: png_infop);
stdcall;
procedure png_free_text(png_ptr: png_structp; info_ptr: png_infop);
stdcall;
procedure png_free_tRNS(png_ptr: png_structp; info_ptr: png_infop);
stdcall;
procedure png_set_spalettes(png_ptr: png_structp; info_ptr: png_infop;
entries: png_spalette_p; nentries: int); entries: png_spalette_p; nentries: int);
stdcall; stdcall;
procedure png_free_sPLT(png_ptr: png_structp; info_ptr: png_infop);
stdcall;
implementation implementation
@ -684,6 +676,7 @@ function png_get_pixel_aspect_ratio; external pngDLL;
function png_get_pixels_per_meter; external pngDLL; function png_get_pixels_per_meter; external pngDLL;
function png_get_progressive_ptr; external pngDLL; function png_get_progressive_ptr; external pngDLL;
function png_get_rowbytes; external pngDLL; function png_get_rowbytes; external pngDLL;
function png_get_rows; external pngDLL;
function png_get_sBIT; external pngDLL; function png_get_sBIT; external pngDLL;
function png_get_sRGB; external pngDLL; function png_get_sRGB; external pngDLL;
function png_get_signature; external pngDLL; function png_get_signature; external pngDLL;
@ -741,6 +734,7 @@ procedure png_set_progressive_read_fn; external pngDLL;
procedure png_set_read_fn; external pngDLL; procedure png_set_read_fn; external pngDLL;
procedure png_set_read_status_fn; external pngDLL; procedure png_set_read_status_fn; external pngDLL;
procedure png_set_read_user_transform_fn; external pngDLL; procedure png_set_read_user_transform_fn; external pngDLL;
procedure png_set_rows; external pngDLL;
procedure png_set_sBIT; external pngDLL; procedure png_set_sBIT; external pngDLL;
procedure png_set_sRGB; external pngDLL; procedure png_set_sRGB; external pngDLL;
procedure png_set_sRGB_gAMA_and_cHRM; external pngDLL; procedure png_set_sRGB_gAMA_and_cHRM; external pngDLL;
@ -771,16 +765,9 @@ procedure png_write_info_before_PLTE; external pngDLL;
procedure png_write_row; external pngDLL; procedure png_write_row; external pngDLL;
procedure png_write_rows; external pngDLL; procedure png_write_rows; external pngDLL;
procedure png_get_iCCP; external pngDLL; procedure png_get_iCCP; external pngDLL;
procedure png_get_spalettes; external pngDLL; procedure png_get_sPLT; external pngDLL;
procedure png_free_pCAL; external pngDLL;
procedure png_set_iCCP; external pngDLL; procedure png_set_iCCP; external pngDLL;
procedure png_free_hIST; external pngDLL; procedure png_set_sPLT; external pngDLL;
procedure png_free_iCCP; external pngDLL; procedure png_free_data; external pngDLL;
procedure png_free_PLTE; external pngDLL;
procedure png_free_sCAL; external pngDLL;
procedure png_free_text; external pngDLL;
procedure png_free_tRNS; external pngDLL;
procedure png_set_spalettes; external pngDLL;
procedure png_free_sPLT; external pngDLL;
end. end.

15
scripts/pngos2.def
View File

@ -31,6 +31,7 @@ EXPORTS
png_set_bgr png_set_bgr
png_set_gray_to_rgb png_set_gray_to_rgb
png_set_rgb_to_gray png_set_rgb_to_gray
png_set_rows
png_build_grayscale_palette png_build_grayscale_palette
png_set_strip_alpha png_set_strip_alpha
png_set_swap_alpha png_set_swap_alpha
@ -120,6 +121,7 @@ EXPORTS
png_get_pixels_per_meter png_get_pixels_per_meter
png_get_pixel_aspect_ratio png_get_pixel_aspect_ratio
png_get_rgb_to_gray_status png_get_rgb_to_gray_status
png_get_rows
png_get_x_offset_pixels png_get_x_offset_pixels
png_get_y_offset_pixels png_get_y_offset_pixels
png_get_x_offset_microns png_get_x_offset_microns
@ -291,17 +293,10 @@ EXPORTS
; png_pass_height ; png_pass_height
png_get_iCCP png_get_iCCP
png_get_sCAL png_get_sCAL
png_get_spalettes png_get_sPLT
png_set_iCCP png_set_iCCP
png_set_spalettes png_set_sPLT
png_free_hIST png_free_data
png_free_iCCP
png_free_pCAL
png_free_PLTE
png_free_sCAL
png_free_sPLT
png_free_text
png_free_tRNS
png_IHDR png_IHDR
png_IDAT png_IDAT