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libpng
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Imported from libpng-0.99d.tar

This commit is contained in:
Glenn Randers-Pehrson 1998-02-08 20:56:40 -06:00
parent 0f881d62b3
commit a357b99113
24 changed files with 3267 additions and 1198 deletions
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12
CHANGES
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@ -223,5 +223,13 @@ version 0.99b [February 4, 1998]
version 0.99c [February 7, 1998]
More type casting. Removed erroneous overflow test in pngmem.c.
Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
Added UNIX manual pages libpng.3, initially created by R. P. C. Rodgers,
U.S. National Library of Medicine (rodgers@nlm.nih.gov), and png.5.
Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
version 0.99d [February 8, 1998]
Renamed "far_to_near()" "png_far_to_near()"
Revised libpng.3
Version 99c "buffered" operations didn't work as intended. Replaced them
with png_memcpy_check() and png_memset_check().
version 0.99e [February 9, 1998]
Fixed a bug with background compositing of paletted images in pngrtran.c
Added many "if (png_ptr == NULL) return" to quell compiler warnings about
unused png_ptr, mostly in pngget.c and pngset.c.

2
README
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@ -1,4 +1,4 @@
[NOTE: this is still beta version 0.99c; the text below has already
[NOTE: this is still beta version 0.99d; the text below has already
been updated in anticipation of the imminent 1.0 release.]

2632
libpng.3
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File diff suppressed because it is too large Load Diff

785
libpng.txt
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File diff suppressed because it is too large Load Diff

2
png.5
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@ -1,4 +1,4 @@
.TH PNG 5 "February 7, 1998"
.TH PNG 5 "February 8, 1998"
.SH NAME
png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION

5
png.c
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@ -1,12 +1,12 @@
/* png.c - location for general purpose libpng functions
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
#define PNG_INTERNAL
@ -200,6 +200,7 @@ png_create_info_struct(png_structp png_ptr)
png_infop info_ptr;
png_debug(1, "in png_create_info_struct\n");
if(png_ptr == NULL) return (NULL);
if ((info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO)) != NULL)
{
png_info_init(info_ptr);

16
png.h
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@ -1,12 +1,12 @@
/* png.h - header file for PNG reference library
*
* libpng 0.99c beta
* libpng 0.99d beta
* For conditions of distribution and use, see the COPYRIGHT NOTICE below.
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998 Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* Note about libpng version numbers:
*
@ -30,6 +30,7 @@
* 0.99a 0.99 2.0.99
* 0.99b 0.99 2.0.99
* 0.99c 0.99 2.0.99
* 0.99d 0.99 2.0.99
* 1.0 1.00 2.1.0
*
* Henceforth the source version will match the shared-library minor
@ -1109,10 +1110,10 @@ extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr,
/* 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_buffered_memcpy) PNGARG((png_structp png_ptr,
extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr,
png_voidp s1, png_voidp s2, png_uint_32 size));
extern PNG_EXPORT(void,png_buffered_memset) PNGARG((png_structp png_ptr,
extern PNG_EXPORT(png_voidp,png_memset_check) PNGARG((png_structp png_ptr,
png_voidp s1, int value, png_uint_32 size));
#ifdef PNGTEST_MEMORY_DEBUG
@ -1123,7 +1124,8 @@ extern PNG_EXPORT(void,png_debug_free) PNGARG((png_structp png_ptr,
png_voidp ptr));
#endif
#if defined(USE_FAR_KEYWORD) /* memory model conversion function */
extern void *far_to_near PNGARG((png_structp png_ptr,png_voidp ptr,int check));
extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr,
int check));
#endif /* USE_FAR_KEYWORD */
/* Fatal error in PNG image of libpng - can't continue */
@ -1475,8 +1477,8 @@ extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr,
#define PNG_FLAG_FREE_PALETTE 0x1000
#define PNG_FLAG_FREE_TRANS 0x2000
#define PNG_FLAG_FREE_HIST 0x4000
#define PNG_FLAG_HAVE_CHUNK_HEADER 0x8000
#define PNG_FLAG_WROTE_tIME 0x10000
#define PNG_FLAG_HAVE_CHUNK_HEADER 0x8000L
#define PNG_FLAG_WROTE_tIME 0x10000L
#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \
PNG_FLAG_CRC_ANCILLARY_NOWARN)

8
pngconf.h
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@ -1,12 +1,12 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
/* Any machine specific code is near the front of this file, so if you
@ -525,8 +525,8 @@ typedef z_stream FAR * png_zstreamp;
/* use this to make far-to-near assignments */
# define CHECK 1
# define NOCHECK 0
# define CVT_PTR(ptr) (far_to_near(png_ptr,ptr,CHECK))
# define CVT_PTR_NOCHECK(ptr) (far_to_near(png_ptr,ptr,NOCHECK))
# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
# define png_strlen _fstrlen
# define png_memcmp _fmemcmp /* SJT: added */
# define png_memcpy _fmemcpy

4
pngerror.c
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@ -1,12 +1,12 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file provides a location for all error handling. Users which
* need special error handling are expected to write replacement functions

72
pngget.c
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@ -1,12 +1,12 @@
/* pngget.c - retrieval of values from info struct
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
#define PNG_INTERNAL
@ -15,7 +15,7 @@
png_uint_32
png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->valid & flag);
else
return(0);
@ -24,7 +24,7 @@ png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
png_uint_32
png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->rowbytes);
else
return(0);
@ -35,7 +35,7 @@ png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
png_uint_32
png_get_image_width(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->width;
}
@ -45,7 +45,7 @@ png_get_image_width(png_structp png_ptr, png_infop info_ptr)
png_uint_32
png_get_image_height(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->height;
}
@ -55,7 +55,7 @@ png_get_image_height(png_structp png_ptr, png_infop info_ptr)
png_byte
png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->bit_depth;
}
@ -65,7 +65,7 @@ png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
png_byte
png_get_color_type(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->color_type;
}
@ -75,7 +75,7 @@ png_get_color_type(png_structp png_ptr, png_infop info_ptr)
png_byte
png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->filter_type;
}
@ -85,7 +85,7 @@ png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
png_byte
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->interlace_type;
}
@ -95,7 +95,7 @@ png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
png_byte
png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->compression_type;
}
@ -106,7 +106,7 @@ png_uint_32
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
@ -122,7 +122,7 @@ float
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
if (info_ptr->x_pixels_per_unit == 0)
@ -140,7 +140,7 @@ png_uint_32
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
@ -156,7 +156,7 @@ png_uint_32
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
@ -172,7 +172,7 @@ png_uint_32
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
@ -188,7 +188,7 @@ png_uint_32
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
@ -206,7 +206,7 @@ png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
png_byte
png_get_channels(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->channels);
else
return (0);
@ -215,7 +215,7 @@ png_get_channels(png_structp png_ptr, png_infop info_ptr)
png_bytep
png_get_signature(png_structp png_ptr, png_infop info_ptr)
{
if (info_ptr != NULL)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->signature);
else
return (NULL);
@ -226,7 +226,7 @@ png_uint_32
png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
png_color_16p *background)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_bKGD &&
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_bKGD &&
background != NULL)
{
png_debug1(1, "in %s retrieval function\n", "bKGD");
@ -243,7 +243,7 @@ png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
double *white_x, double *white_y, double *red_x, double *red_y,
double *green_x, double *green_y, double *blue_x, double *blue_y)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_cHRM)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_cHRM)
{
png_debug1(1, "in %s retrieval function\n", "cHRM");
if (white_x != NULL)
@ -272,7 +272,7 @@ png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
png_uint_32
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_gAMA &&
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_gAMA &&
file_gamma != NULL)
{
png_debug1(1, "in %s retrieval function\n", "gAMA");
@ -287,7 +287,7 @@ png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
png_uint_32
png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_sRGB &&
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_sRGB &&
file_srgb_intent != NULL)
{
png_debug1(1, "in %s retrieval function\n", "sRGB");
@ -302,7 +302,8 @@ png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
png_uint_32
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_hIST && hist != NULL)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_hIST &&
hist != NULL)
{
png_debug1(1, "in %s retrieval function\n", "hIST");
*hist = info_ptr->hist;
@ -319,10 +320,9 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
int *filter_type)
{
if (info_ptr != NULL && width != NULL && height != NULL &&
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
bit_depth != NULL && color_type != NULL)
{
png_uint_32 rowbytes;
int pixel_depth, channels;
png_uint_32 rowbytes_per_pixel;
@ -349,7 +349,6 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
channels++;
pixel_depth = *bit_depth * channels;
rowbytes_per_pixel = (pixel_depth + 7) >> 3;
rowbytes = *width * rowbytes_per_pixel;
if ((*width > (png_uint_32)2147483647L/rowbytes_per_pixel))
{
png_warning(png_ptr,
@ -365,7 +364,7 @@ png_uint_32
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *offset_x, png_uint_32 *offset_y, int *unit_type)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs &&
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs &&
offset_x != NULL && offset_y != NULL && unit_type != NULL)
{
png_debug1(1, "in %s retrieval function\n", "oFFs");
@ -384,7 +383,7 @@ png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
png_charp *units, png_charpp *params)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_pCAL &&
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pCAL &&
purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
nparams != NULL && units != NULL && params != NULL)
{
@ -409,7 +408,7 @@ png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
{
png_uint_32 retval = 0;
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "pHYs");
if (res_x != NULL && res_y != NULL)
@ -433,7 +432,8 @@ png_uint_32
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
int *num_palette)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_PLTE && palette != NULL)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_PLTE &&
palette != NULL)
{
png_debug1(1, "in %s retrieval function\n", "PLTE");
*palette = info_ptr->palette;
@ -448,7 +448,8 @@ png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
png_uint_32
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_sBIT && sig_bit != NULL)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_sBIT &&
sig_bit != NULL)
{
png_debug1(1, "in %s retrieval function\n", "sBIT");
*sig_bit = &(info_ptr->sig_bit);
@ -463,7 +464,7 @@ png_uint_32
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
int *num_text)
{
if ((info_ptr != NULL) || (info_ptr->num_text > 0))
if (png_ptr != NULL && info_ptr != NULL || info_ptr->num_text > 0)
{
png_debug1(1, "in %s retrieval function\n",
(png_ptr->chunk_name[0] == '\0' ? "text"
@ -482,7 +483,8 @@ png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
png_uint_32
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_tIME && mod_time != NULL)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tIME &&
mod_time != NULL)
{
png_debug1(1, "in %s retrieval function\n", "tIME");
*mod_time = &(info_ptr->mod_time);
@ -497,7 +499,7 @@ png_uint_32
png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
png_bytep *trans, int *num_trans, png_color_16p *trans_values)
{
if (info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS)
if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS)
{
png_debug1(1, "in %s retrieval function\n", "tRNS");
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE && trans != NULL)

54
pngmem.c
View File

@ -1,11 +1,11 @@
/* pngmem.c - stub functions for memory allocation
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file provides a location for all memory allocation. Users which
* need special memory handling are expected to modify the code in this file
@ -282,27 +282,22 @@ png_voidp
PNG_MALLOC(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
png_size_t length;
if (png_ptr == NULL || size == 0)
return ((png_voidp)NULL);
#ifdef PNG_MAX_MALLOC_64K
if (png_size > (png_uint_32)65536L)
if (size > (png_uint_32)65536L)
png_error(png_ptr, "Cannot Allocate > 64K");
#endif
length = (png_size_t)size;
if ((png_uint_32)length != size)
png_error(png_ptr, "Cannot Allocate > size_t");
#if defined(__TURBOC__) && !defined(__FLAT__)
ret = farmalloc(length);
ret = farmalloc(size);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
ret = halloc(length, 1);
ret = halloc(size, 1);
# else
ret = malloc(length);
ret = malloc(size);
# endif
#endif
@ -336,32 +331,29 @@ PNG_FREE(png_structp png_ptr, png_voidp ptr)
#endif /* Not Borland DOS special memory handler */
void
png_buffered_memcpy (png_structp png_ptr, png_voidp s1, png_voidp s2,
png_voidp
png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
png_uint_32 length)
{
png_size_t size;
png_uint_32 i;
for (i=0; i<length; i+=65530)
{
size = (png_size_t)(length - i);
if (size > (png_size_t)65530L)
size=(png_size_t)65530L;
png_memcpy (s1, s2, size);
}
size = (png_size_t)length;
if ((png_uint_32)size != length)
png_error(png_ptr,"Overflow in png_memcpy_check.");
return(png_memcpy (s1, s2, size));
}
void
png_buffered_memset (png_structp png_ptr, png_voidp s1, int value,
png_voidp
png_memset_check (png_structp png_ptr, png_voidp s1, int value,
png_uint_32 length)
{
png_size_t size;
png_uint_32 i;
for (i=0; i<length; i+=65530)
{
size = length - i;
if (size > 65530)
size=65530;
png_memset (s1, value, size);
}
size = (png_size_t)length;
if ((png_uint_32)size != length)
png_error(png_ptr,"Overflow in png_memset_check.");
return (png_memset (s1, value, size));
}

24
pngpread.c
View File

@ -1,12 +1,12 @@
/* pngpread.c - read a png file in push mode
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
#define PNG_INTERNAL
@ -638,7 +638,7 @@ png_push_process_row(png_structp png_ptr)
png_ptr->row_buf + 1, png_ptr->prev_row + 1,
(int)(png_ptr->row_buf[0]));
png_buffered_memcpy(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
png_ptr->rowbytes + 1);
if (png_ptr->transformations)
@ -774,8 +774,8 @@ png_read_push_finish_row(png_structp png_ptr)
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
png_buffered_memset(png_ptr, png_ptr->prev_row, 0,
(png_size_t)png_ptr->rowbytes + 1);
png_memset_check(png_ptr, png_ptr->prev_row, 0,
png_ptr->rowbytes + 1);
do
{
png_ptr->pass++;
@ -806,7 +806,11 @@ void
png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
if (png_ptr->mode == PNG_BEFORE_IHDR || png_ptr->mode & PNG_HAVE_IEND)
png_error(png_ptr, "Out of place tEXt");
{
png_error(png_ptr, "Out of place tEXt");
/* to quiet some compiler warnings */
if(info_ptr == NULL) return;
}
#ifdef PNG_MAX_MALLOC_64K
png_ptr->skip_length = 0; /* This may not be necessary */
@ -888,7 +892,11 @@ void
png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
if (png_ptr->mode == PNG_BEFORE_IHDR || png_ptr->mode & PNG_HAVE_IEND)
png_error(png_ptr, "Out of place zTXt");
{
png_error(png_ptr, "Out of place zTXt");
/* to quiet some compiler warnings */
if(info_ptr == NULL) return;
}
#ifdef PNG_MAX_MALLOC_64K
/* We can't handle zTXt chunks > 64K, since we don't have enough space
@ -1073,6 +1081,8 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 len
if (!(png_ptr->chunk_name[0] & 0x20))
{
png_chunk_error(png_ptr, "unknown critical chunk");
/* to quiet some compiler warnings */
if(info_ptr == NULL) return;
}
png_push_crc_skip(png_ptr, length);

6
pngread.c
View File

@ -1,12 +1,12 @@
/* pngread.c - read a PNG file
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file contains routines that an application calls directly to
* read a PNG file or stream.
@ -418,7 +418,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
png_ptr->row_buf + 1, png_ptr->prev_row + 1,
(int)(png_ptr->row_buf[0]));
png_buffered_memcpy(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
png_ptr->rowbytes + 1);
if (png_ptr->transformations)

4
pngrio.c
View File

@ -1,12 +1,12 @@
/* pngrio.c - functions for data input
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file provides a location for all input. Users which need
* special handling are expected to write a function which has the same

13
pngrtran.c
View File

@ -1,12 +1,12 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file contains functions optionally called by an application
* in order to tell libpng how to handle data when reading a PNG.
@ -1913,24 +1913,21 @@ png_correct_palette(png_structp png_ptr, png_colorp palette,
{
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
int i;
png_color back;
back.red = (png_byte)png_ptr->background.red;
back.green = (png_byte)png_ptr->background.green;
back.blue = (png_byte)png_ptr->background.blue;
for (i = 0; i < num_palette; i++)
for (i = 0; i < (int)png_ptr->num_trans && i < num_palette; i++)
{
if (i >= (int)png_ptr->num_trans ||
png_ptr->trans[i] == 0)
if (png_ptr->trans[i] == 0)
{
palette[i].red = back.red;
palette[i].green = back.green;
palette[i].blue = back.blue;
}
else if (i < (int)png_ptr->num_trans ||
png_ptr->trans[i] != 0xff)
else if (png_ptr->trans[i] != 0xff)
{
png_composite(palette[i].red, png_ptr->palette[i].red,
png_ptr->trans[i], back.red);

61
pngrutil.c
View File

@ -6,7 +6,7 @@
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file contains routines which are only called from within
* libpng itself during the course of reading an image.
@ -345,6 +345,10 @@ png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT))
{
png_error(png_ptr, "No image in file");
/* to quiet compiler warnings about unused info_ptr */
if (info_ptr == NULL)
return;
}
png_ptr->mode |= PNG_AFTER_IDAT | PNG_HAVE_IEND;
@ -722,7 +726,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS)
{
png_warning(png_ptr, "Duplcate tRNS chunk");
png_warning(png_ptr, "Duplicate tRNS chunk");
png_crc_finish(png_ptr, length);
return;
}
@ -1022,6 +1026,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_byte type, nparams;
png_charp buf, units, endptr;
png_charpp params;
png_size_t slength;
int i;
png_debug(1, "in png_handle_pCAL\n");
@ -1044,7 +1049,8 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_debug1(2, "Allocating and reading pCAL chunk data (%d bytes)\n",
length + 1);
purpose = (png_charp)png_malloc(png_ptr, length + 1);
png_crc_read(png_ptr, (png_bytep)purpose, (png_size_t)length);
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)purpose, slength);
if (png_crc_finish(png_ptr, 0))
{
@ -1052,13 +1058,13 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
purpose[length] = '\0'; /* null terminate the last string */
purpose[slength] = 0x00; /* null terminate the last string */
png_debug(3, "Finding end of pCAL purpose string\n");
for (buf = purpose; *buf != '\0'; buf++)
/* empty loop */;
endptr = purpose + length;
endptr = purpose + slength;
/* We need to have at least 12 bytes after the purpose string
in order to get the parameter information. */
@ -1094,7 +1100,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
/* Empty loop to move past the units string. */
for (buf = units; *buf != '\0'; buf++);
for (buf = units; *buf != 0x00; buf++);
png_debug(3, "Allocating pCAL parameters array\n");
params = (png_charpp)png_malloc(png_ptr, (png_uint_32)(nparams
@ -1107,7 +1113,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_debug1(3, "Reading pCAL parameter %d\n", i);
/* Empty loop to move past each paramter string */
for (params[i] = buf; *buf != '\0' && buf <= endptr; buf++);
for (params[i] = buf; *buf != 0x00 && buf <= endptr; buf++);
/* Make sure we haven't run out of data yet */
if (buf > endptr)
@ -1179,6 +1185,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_charp key;
png_charp text;
png_uint_32 skip = 0;
png_size_t slength;
png_debug(1, "in png_handle_tEXt\n");
@ -1198,7 +1205,8 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
key = (png_charp)png_malloc(png_ptr, length + 1);
png_crc_read(png_ptr, (png_bytep)key, (png_size_t)length);
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)key, slength);
if (png_crc_finish(png_ptr, skip))
{
@ -1206,12 +1214,12 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
key[length] = '\0';
key[slength] = 0x00;
for (text = key; *text; text++)
/* empty loop to find end of key */ ;
if (text != key + (png_size_t)length)
if (text != key + slength)
text++;
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
@ -1235,6 +1243,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_charp key;
png_charp text;
int comp_type = PNG_TEXT_COMPRESSION_NONE;
png_size_t slength;
png_debug(1, "in png_handle_zTXt\n");
@ -1256,20 +1265,21 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
key = (png_charp)png_malloc(png_ptr, length + 1);
png_crc_read(png_ptr, (png_bytep)key, (png_size_t)length);
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)key, slength);
if (png_crc_finish(png_ptr, 0))
{
png_free(png_ptr, key);
return;
}
key[length] = '\0';
key[slength] = 0x00;
for (text = key; *text; text++)
/* empty loop */ ;
/* zTXt must have some text after the keyword */
if (text == key + (png_size_t)length)
if (text == key + slength)
{
png_warning(png_ptr, "Zero length zTXt chunk");
}
@ -1283,7 +1293,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = png_ptr->zbuf_size;
key_size = text - key;
key_size = (png_size_t)(text - key);
text_size = 0;
text = NULL;
@ -1308,10 +1318,10 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_memcpy(text, key, key_size);
}
text[text_size - 1] = '\0';
text[text_size - 1] = 0x00;
/* Copy what we can of the error message into the text chunk */
text_size = (png_size_t)length - (text - key) - 1;
text_size = (png_size_t)(slength - (text - key) - 1);
text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
png_memcpy(text + key_size, msg, text_size + 1);
break;
@ -1328,7 +1338,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_memcpy(text, key, key_size);
text_size = key_size + png_ptr->zbuf_size -
png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
*(text + text_size) = 0x00;
}
else
{
@ -1342,7 +1352,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_memcpy(text + text_size, png_ptr->zbuf,
(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
*(text + text_size) = 0x00;
}
if (ret != Z_STREAM_END)
{
@ -1376,7 +1386,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
/* Copy what we can of the error message into the text chunk */
text_size = (png_size_t)length - (text - key) - 1;
text_size = (png_size_t)(slength - (text - key) - 1);
text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
png_memcpy(text, msg, text_size + 1);
}
@ -1409,12 +1419,17 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (!(png_ptr->chunk_name[0] & 0x20))
{
png_chunk_error(png_ptr, "unknown critical chunk");
/* to quiet compiler warnings about unused info_ptr */
if (info_ptr == NULL)
return;
}
if (png_ptr->mode & PNG_HAVE_IDAT)
png_ptr->mode |= PNG_AFTER_IDAT;
png_crc_finish(png_ptr, length);
}
/* This function is called to verify that a chunk name is valid.
@ -1847,8 +1862,8 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
pixel_bytes = (row_info->pixel_depth >> 3);
sp = row + (row_info->width - 1) * pixel_bytes;
dp = row + (final_width - 1) * pixel_bytes;
sp = row + (png_size_t)(row_info->width - 1) * pixel_bytes;
dp = row + (png_size_t)(final_width - 1) * pixel_bytes;
for (i = row_info->width; i; i--)
{
png_byte v[8];
@ -1993,7 +2008,7 @@ png_read_finish_row(png_structp png_ptr)
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
png_buffered_memset(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
do
{
png_ptr->pass++;
@ -2203,7 +2218,7 @@ png_read_start_row(png_structp png_ptr)
png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
png_ptr->rowbytes + 1));
png_buffered_memset(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
png_debug1(3, "width = %d,\n", png_ptr->width);
png_debug1(3, "height = %d,\n", png_ptr->height);

38
pngset.c
View File

@ -1,12 +1,12 @@
/* pngset.c - storage of image information into info struct
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* The functions here are used during reads to store data from the file
* into the info struct, and during writes to store application data
@ -22,7 +22,7 @@ void
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
{
png_debug1(1, "in %s storage function\n", "bKGD");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
@ -37,7 +37,7 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
double green_x, double green_y, double blue_x, double blue_y)
{
png_debug1(1, "in %s storage function\n", "cHRM");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->x_white = (float)white_x;
@ -57,7 +57,7 @@ void
png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
{
png_debug1(1, "in %s storage function\n", "gAMA");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->gamma = (float)file_gamma;
@ -70,7 +70,7 @@ void
png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
{
png_debug1(1, "in %s storage function\n", "hIST");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->hist = hist;
@ -86,7 +86,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
{
int rowbytes_per_pixel;
png_debug1(1, "in %s storage function\n", "IHDR");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->width = width;
@ -123,7 +123,7 @@ png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
png_uint_32 offset_x, png_uint_32 offset_y, int unit_type)
{
png_debug1(1, "in %s storage function\n", "oFFs");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->x_offset = offset_x;
@ -140,10 +140,10 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
png_charp units, png_charpp params)
{
png_uint_32 length;
png_uint_32 i;
int i;
png_debug1(1, "in %s storage function\n", "pCAL");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
length = png_strlen(purpose) + 1;
@ -184,7 +184,7 @@ png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
png_uint_32 res_x, png_uint_32 res_y, int unit_type)
{
png_debug1(1, "in %s storage function\n", "pHYs");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->x_pixels_per_unit = res_x;
@ -199,7 +199,7 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_colorp palette, int num_palette)
{
png_debug1(1, "in %s storage function\n", "PLTE");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->palette = palette;
@ -213,7 +213,7 @@ png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
png_color_8p sig_bit)
{
png_debug1(1, "in %s storage function\n", "sBIT");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
@ -226,7 +226,7 @@ void
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
{
png_debug1(1, "in %s storage function\n", "sRGB");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
info_ptr->srgb_intent = (png_byte)intent;
@ -243,7 +243,7 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
#endif
png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
png_set_sRGB(png_ptr, info_ptr, intent);
@ -281,7 +281,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
"text" : (png_const_charp)png_ptr->chunk_name));
if (info_ptr == NULL || num_text == 0)
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
return;
/* Make sure we have enough space in the "text" array in info_struct
@ -298,7 +298,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
info_ptr->max_text = info_ptr->num_text + num_text + 8;
old_text = info_ptr->text;
info_ptr->text = (png_textp)png_malloc(png_ptr,
info_ptr->max_text * sizeof (png_text));
(png_uint_32)(info_ptr->max_text * sizeof (png_text)));
png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
sizeof(png_text)));
png_free(png_ptr, old_text);
@ -344,7 +344,7 @@ void
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
{
png_debug1(1, "in %s storage function\n", "tIME");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
@ -358,7 +358,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
png_bytep trans, int num_trans, png_color_16p trans_values)
{
png_debug1(1, "in %s storage function\n", "tRNS");
if (info_ptr == NULL)
if (png_ptr == NULL || info_ptr == NULL)
return;
if (trans != NULL)

6
pngtest.c
View File

@ -1,12 +1,12 @@
/* pngtest.c - a simple test program to test libpng
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This program reads in a PNG image, writes it out again, and then
* compares the two files. If the files are identical, this shows that
@ -39,7 +39,6 @@
#ifdef PNGTEST_MEMORY_DEBUG
#include <unistd.h>
void *sbrk (ssize_t incr);
#endif
int test_one_file(PNG_CONST char *inname, PNG_CONST char *outname);
@ -857,7 +856,6 @@ main(int argc, char *argv[])
pinfo = pinfo->next;
}
}
fprintf(STDERR, "sbrk(0)=%d\n",sbrk(0));
#endif
}
#ifdef PNGTEST_MEMORY_DEBUG

4
pngtrans.c
View File

@ -1,12 +1,12 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
#define PNG_INTERNAL

8
pngwio.c
View File

@ -1,12 +1,12 @@
/* pngwio.c - functions for data output
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*
* This file provides a location for all output. Users which need
* special handling are expected to write functions which have the same
@ -180,7 +180,7 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
#if defined(USE_FAR_KEYWORD)
#if defined(_MSC_VER)
void *far_to_near(png_structp png_ptr,png_voidp ptr, int check)
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;
@ -192,7 +192,7 @@ void *far_to_near(png_structp png_ptr,png_voidp ptr, int check)
return(near_ptr);
}
# else
void *far_to_near(png_structp png_ptr,png_voidp ptr, int check)
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;

12
pngwrite.c
View File

@ -1,12 +1,12 @@
/* pngwrite.c - general routines to write a PNG file
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
/* get internal access to png.h */
@ -502,7 +502,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_debug1(3, "row_info->rowbytes = %d\n", png_ptr->row_info.rowbytes);
/* Copy user's row into buffer, leaving room for filter byte. */
png_buffered_memcpy(png_ptr, png_ptr->row_buf + 1, row,
png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row,
png_ptr->row_info.rowbytes);
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
@ -831,10 +831,10 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
if (png_ptr->filter_weights == NULL)
{
png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
png_ptr->filter_weights = png_malloc(png_ptr,
(png_uint_32)(sizeof(png_uint_16) * num_weights));
png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
png_ptr->inv_filter_weights = png_malloc(png_ptr,
(png_uint_32)(sizeof(png_uint_16) * num_weights));
for (i = 0; i < num_weights; i++)
@ -866,7 +866,7 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
*/
if (png_ptr->filter_costs == NULL)
{
png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
png_ptr->filter_costs = png_malloc(png_ptr,
(png_uint_32)(sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,

4
pngwtran.c
View File

@ -1,12 +1,12 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
#define PNG_INTERNAL

6
pngwutil.c
View File

@ -1,12 +1,12 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng 0.99c
* libpng 0.99d
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 7, 1998
* February 8, 1998
*/
#define PNG_INTERNAL
@ -1358,7 +1358,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
i += png_pass_inc[pass])
{
/* find out where the original pixel is */
sp = row + i * pixel_bytes;
sp = row + (png_size_t)i * pixel_bytes;
/* move the pixel */
if (dp != sp)
png_memcpy(dp, sp, pixel_bytes);

687
synopsis.txt
View File

@ -1,687 +0,0 @@
Synopsis, for man pages:
void *far_to_near (png_structp png_ptr,png_voidp ptr,int
check);
png_voidp png_buffered_memcpy (png_structp png_ptr, png_voidp
s1, png_voidp s2, png_uint_32 size);
png_voidp png_buffered_memset (png_structp png_ptr, png_voidp
s1, int value, png_uint_32 size);
void png_build_gamma_table (png_structp png_ptr);
void png_build_grayscale_palette (int bit_depth, png_colorp
palette);
void png_calculate_crc (png_structp png_ptr, png_bytep ptr,
png_size_t length);
void png_check_chunk_name (png_structp png_ptr, png_bytep
chunk_name);
png_size_t png_check_keyword (png_structp png_ptr, png_charp
key, png_charpp new_key);
int png_check_sig (png_bytep sig, int num);
void png_chunk_error (png_structp png_ptr, png_const_charp
error);
void png_chunk_warning (png_structp png_ptr, png_const_charp
message);
void png_combine_row (png_structp png_ptr, png_bytep row, int
mask);
void png_convert_from_struct_tm (png_timep ptime, struct tm FAR
* ttime);
void png_convert_from_time_t (png_timep ptime, time_t ttime);
png_charp png_convert_to_rfc1123) (png_structp png_ptr,
png_timep ptime);
void png_correct_palette (png_structp png_ptr, png_colorp
palette, int num_palette);
int png_crc_error (png_structp png_ptr);
int png_crc_finish (png_structp png_ptr, png_uint_32 skip);
void png_crc_read (png_structp png_ptr, png_bytep buf,
png_size_t length);
png_infop png_create_info_struct) (png_structp png_ptr);
png_structp png_create_read_struct) (png_const_charp
user_png_ver, voidp error_ptr, png_error_ptr error_fn,
png_error_ptr warn_fn);
png_voidp png_create_struct (int type);
png_structp png_create_write_struct) (png_const_charp
user_png_ver, voidp error_ptr, png_error_ptr error_fn,
png_error_ptr warn_fn);
void png_debug_free (png_structp png_ptr, png_voidp ptr);
png_voidp png_debug_malloc (png_structp png_ptr, png_uint_32
size);
void png_destroy_info_struct (png_structp png_ptr, png_infopp
info_ptr_ptr);
void png_destroy_read_struct (png_structpp png_ptr_ptr,
png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr);
void png_destroy_struct (png_voidp struct_ptr);
void png_destroy_write_struct (png_structpp png_ptr_ptr,
png_infopp info_ptr_ptr);
void png_do_background (png_row_infop row_info, png_bytep row,
png_color_16p trans_values, png_color_16p background,
png_color_16p background_1, png_bytep gamma_table, png_bytep
gamma_from_1, png_bytep gamma_to_1, png_uint_16pp gamma_16,
png_uint_16pp gamma_16_from_1, png_uint_16pp gamma_16_to_1, int
gamma_shift);
void png_do_bgr (png_row_infop row_info, png_bytep row);
void png_do_chop (png_row_infop row_info, png_bytep row);
void png_do_dither (png_row_infop row_info, png_bytep row,
png_bytep palette_lookup, png_bytep dither_lookup);
void png_do_expand (png_row_infop row_info, png_bytep row,
png_color_16p trans_value);
void png_do_expand_palette (png_row_infop row_info, png_bytep
row, png_colorp palette, png_bytep trans, int num_trans);
void png_do_gamma (png_row_infop row_info, png_bytep row,
png_bytep gamma_table, png_uint_16pp gamma_16_table, int
gamma_shift);
void png_do_gray_to_rgb (png_row_infop row_info, png_bytep
row);
void png_do_invert (png_row_infop row_info, png_bytep row);
void png_do_pack (png_row_infop row_info, png_bytep row,
png_uint_32 bit_depth);
void png_do_packswap (png_row_infop row_info, png_bytep row);
void png_do_read_filler (png_row_infop row_info, png_bytep row,
png_uint_32 filler, png_uint_32 flags);
void png_do_read_interlace (png_row_infop row_info, png_bytep
row, int pass, png_uint_32 transformations);
void png_do_read_invert_alpha (png_row_infop row_info,
png_bytep row);
void png_do_read_swap_alpha (png_row_infop row_info, png_bytep
row);
void png_do_read_transformations (png_structp png_ptr);
void png_do_rgb_to_gray (png_row_infop row_info, png_bytep
row);
void png_do_shift (png_row_infop row_info, png_bytep row,
png_color_8p bit_depth);
void png_do_strip_filler (png_row_infop row_info, png_bytep
row, png_uint_32 flags);
void png_do_swap (png_row_infop row_info, png_bytep row);
void png_do_unpack (png_row_infop row_info, png_bytep row);
void png_do_unshift (png_row_infop row_info, png_bytep row,
png_color_8p sig_bits);
void png_do_write_interlace (png_row_infop row_info, png_bytep
row, int pass);
void png_do_write_invert_alpha (png_row_infop row_info,
png_bytep row);
void png_do_write_swap_alpha (png_row_infop row_info, png_bytep
row);
void png_do_write_transformations (png_structp png_ptr);
void png_error (png_structp png_ptr, png_const_charp error);
void png_flush (png_structp png_ptr);
void png_free (png_structp png_ptr, png_voidp ptr);
png_byte png_get_bit_depth (png_structp png_ptr, png_infop
info_ptr);
png_uint_32 png_get_bKGD (png_structp png_ptr, png_infop
info_ptr, png_color_16p *background);
png_byte png_get_channels (png_structp png_ptr, png_infop
info_ptr);
png_uint_32 png_get_cHRM (png_structp png_ptr, png_infop
info_ptr, double *white_x, double *white_y, double *red_x,
double *red_y, double *green_x, double *green_y, double
*blue_x, double *blue_y);
png_byte png_get_color_type (png_structp png_ptr, png_infop
info_ptr);
png_byte png_get_compression_type (png_structp png_ptr,
png_infop info_ptr);
png_voidp png_get_error_ptr (png_structp png_ptr);
png_byte png_get_filter_type (png_structp png_ptr, png_infop
info_ptr);
png_uint_32 png_get_gAMA (png_structp png_ptr, png_infop
info_ptr, double *file_gamma);
png_uint_32 png_get_hIST (png_structp png_ptr, png_infop
info_ptr, png_uint_16p *hist);
png_uint_32 png_get_image_height (png_structp png_ptr,
png_infop info_ptr);
png_uint_32 png_get_image_width (png_structp png_ptr, png_infop
info_ptr);
png_int_32 png_get_int_32 (png_bytep buf);
png_byte png_get_interlace_type (png_structp png_ptr, png_infop
info_ptr);
png_voidp png_get_io_ptr (png_structp png_ptr);
png_uint_32 png_get_IHDR (png_structp png_ptr, png_infop
info_ptr, png_uint_32 *width, png_uint_32 *height, int
*bit_depth, int *color_type, int *interlace_type, int
*compression_type, int *filter_type);
png_uint_32 png_get_oFFs (png_structp png_ptr, png_infop
info_ptr, png_uint_32 *offset_x, png_uint_32 *offset_y, int
*unit_type);
png_uint_32 png_get_pCAL (png_structp png_ptr, png_infop
info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1,
int *type, int *nparams, png_charp *units, png_charpp *params);
png_uint_32 png_get_pHYs (png_structp png_ptr, png_infop
info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int
*unit_type);
float png_get_pixel_aspect_ratio (png_structp png_ptr,
png_infop info_ptr);
png_uint_32 png_get_pixels_per_meter (png_structp png_ptr,
png_infop info_ptr);
png_voidp png_get_progressive_ptr (png_structp png_ptr);
png_uint_32 png_get_PLTE (png_structp png_ptr, png_infop
info_ptr, png_colorp *palette, int *num_palette);
png_uint_32 png_get_rowbytes (png_structp png_ptr, png_infop
info_ptr);
png_uint_32 png_get_sBIT (png_structp png_ptr, png_infop
info_ptr, png_color_8p *sig_bit);
png_bytep png_get_signature (png_structp png_ptr, png_infop
info_ptr);
png_uint_32 png_get_sRGB (png_structp png_ptr, png_infop
info_ptr, int *intent);
png_uint_32 png_get_text (png_structp png_ptr, png_infop
info_ptr, png_textp *text_ptr, int *num_text);
png_uint_32 png_get_tIME (png_structp png_ptr, png_infop
info_ptr, png_timep *mod_time);
png_uint_32 png_get_tRNS (png_structp png_ptr, png_infop
info_ptr, png_bytep *trans, int *num_trans, png_color_16p
*trans_values);
png_uint_16 png_get_uint_16 (png_bytep buf);
png_uint_32 png_get_uint_32 (png_bytep buf);
png_uint_32 png_get_valid (png_structp png_ptr, png_infop
info_ptr, png_uint_32 flag);
png_uint_32 png_get_x_offset_microns (png_structp png_ptr,
png_infop info_ptr);
png_uint_32 png_get_x_offset_pixels (png_structp png_ptr,
png_infop info_ptr);
png_uint_32 png_get_y_offset_microns (png_structp png_ptr,
png_infop info_ptr);
png_uint_32 png_get_y_offset_pixels (png_structp png_ptr,
png_infop info_ptr);
void png_handle_bKGD (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_cHRM (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_gAMA (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_hIST (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_IEND (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_IHDR (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_oFFs (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_pCAL (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_pHYs (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_PLTE (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_sBIT (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_sRGB (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_tEXt (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_tIME (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_tRNS (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_handle_unknown (png_structp png_ptr, png_infop
info_ptr, png_uint_32 length);
void png_handle_zTXt (png_structp png_ptr, png_infop info_ptr,
png_uint_32 length);
void png_info_destroy (png_structp png_ptr, png_infop
info_ptr);
void png_info_init (png_infop info_ptr);
void png_init_io (png_structp png_ptr, FILE *fp);
void png_init_read_transformations (png_structp png_ptr);
png_voidp png_malloc (png_structp png_ptr, png_uint_32 size);
void png_process_data (png_structp png_ptr, png_infop info_ptr,
png_bytep buffer, png_size_t buffer_size);
void png_process_IDAT_data (png_structp png_ptr, png_bytep
buffer, png_size_t buffer_length);
void png_process_some_data (png_structp png_ptr, png_infop
info_ptr);
void png_progressive_combine_row (png_structp png_ptr,
png_bytep old_row, png_bytep new_row);
void png_push_check_crc (png_structp png_ptr);
void png_push_crc_finish (png_structp png_ptr);
void png_push_crc_skip (png_structp png_ptr, png_uint_32
length);
void png_push_fill_buffer (png_structp png_ptr, png_bytep
buffer, png_size_t length);
void png_push_handle_tEXt (png_structp png_ptr, png_infop
info_ptr, png_uint_32 length);
void png_push_handle_unknown (png_structp png_ptr, png_infop
info_ptr, png_uint_32 length);
void png_push_handle_zTXt (png_structp png_ptr, png_infop
info_ptr, png_uint_32 length);
void png_push_have_end (png_structp png_ptr, png_infop
info_ptr);
void png_push_have_info (png_structp png_ptr, png_infop
info_ptr);
void png_push_have_row (png_structp png_ptr, png_bytep row);
void png_push_process_row (png_structp png_ptr);
void png_push_read_chunk (png_structp png_ptr, png_infop
info_ptr);
void png_push_read_end (png_structp png_ptr, png_infop
info_ptr);
void png_push_read_IDAT (png_structp png_ptr);
void png_push_read_sig (png_structp png_ptr, png_infop
info_ptr);
void png_push_read_tEXt (png_structp png_ptr, png_infop
info_ptr);
void png_push_read_zTXt (png_structp png_ptr, png_infop
info_ptr);
void png_push_restore_buffer (png_structp png_ptr, png_bytep
buffer, png_size_t buffer_length);
void png_push_save_buffer (png_structp png_ptr);
void png_read_data (png_structp png_ptr, png_bytep data,
png_size_t length);
void png_read_destroy (png_structp png_ptr, png_infop info_ptr,
png_infop end_info_ptr);
void png_read_end (png_structp png_ptr, png_infop info_ptr);
void png_read_filter_row (png_structp png_ptr, png_row_infop
row_info, png_bytep row, png_bytep prev_row, int filter);
void png_read_finish_row (png_structp png_ptr);
void png_read_image (png_structp png_ptr, png_bytepp image);
void png_read_info (png_structp png_ptr, png_infop info_ptr);
void png_read_init (png_structp png_ptr);
void png_read_push_finish_row (png_structp png_ptr);
void png_read_row (png_structp png_ptr, png_bytep row,
png_bytep display_row);
void png_read_rows (png_structp png_ptr, png_bytepp row,
png_bytepp display_row, png_uint_32 num_rows);
void png_read_start_row (png_structp png_ptr);
void png_read_transform_info (png_structp png_ptr, png_infop
info_ptr);
void png_read_update_info (png_structp png_ptr, png_infop
info_ptr);
void png_reset_crc (png_structp png_ptr);
void png_save_int_32 (png_bytep buf, png_int_32 i);
void png_save_uint_16 (png_bytep buf, unsigned int i);
void png_save_uint_32 (png_bytep buf, png_uint_32 i);
void png_set_background (png_structp png_ptr, png_color_16p
background_color, int background_gamma_code, int need_expand,
double background_gamma);
void png_set_bgr (png_structp png_ptr);
void png_set_bKGD (png_structp png_ptr, png_infop info_ptr,
png_color_16p background);
void png_set_cHRM (png_structp png_ptr, png_infop info_ptr,
double white_x, double white_y, double red_x, double red_y,
double green_x, double green_y, double blue_x, double blue_y);
void png_set_compression_level (png_structp png_ptr, int
level);
void png_set_compression_mem_level) (png_structp png_ptr, int
mem_level);
void png_set_compression_method (png_structp png_ptr, int
method);
void png_set_compression_strategy) (png_structp png_ptr, int
strategy);
void png_set_compression_window_bits) (png_structp png_ptr, int
window_bits);
void png_set_crc_action (png_structp png_ptr, int crit_action,
int ancil_action);
void png_set_dither (png_structp png_ptr, png_colorp palette,
int num_palette, int maximum_colors, png_uint_16p histogram,
int full_dither);
void png_set_error_fn (png_structp png_ptr, png_voidp
error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn);
void png_set_expand (png_structp png_ptr);
void png_set_filler (png_structp png_ptr, png_uint_32 filler,
int flags);
void png_set_filter (png_structp png_ptr, int method, int
filters);
void png_set_filter_heuristics (png_structp png_ptr, int
heuristic_method, int num_weights, png_doublep filter_weights,
png_doublep filter_costs);
void png_set_flush (png_structp png_ptr, int nrows);
void png_set_gamma (png_structp png_ptr, double screen_gamma,
double default_file_gamma);
void png_set_gAMA (png_structp png_ptr, png_infop info_ptr,
double file_gamma);
void png_set_gray_to_rgb (png_structp png_ptr);
void png_set_hIST (png_structp png_ptr, png_infop info_ptr,
png_uint_16p hist);
int png_set_interlace_handling (png_structp png_ptr);
void png_set_invert_alpha (png_structp png_ptr);
void png_set_invert_mono (png_structp png_ptr);
void png_set_IHDR (png_structp png_ptr, png_infop info_ptr,
png_uint_32 width, png_uint_32 height, int bit_depth, int
color_type, int interlace_type, int compression_type, int
filter_type);
void png_set_oFFs (png_structp png_ptr, png_infop info_ptr,
png_uint_32 offset_x, png_uint_32 offset_y, int unit_type);
void png_set_packing (png_structp png_ptr);
void png_set_packswap (png_structp png_ptr);
void png_set_pCAL (png_structp png_ptr, png_infop info_ptr,
png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int
nparams, png_charp units, png_charpp params);
void png_set_pHYs (png_structp png_ptr, png_infop info_ptr,
png_uint_32 res_x, png_uint_32 res_y, int unit_type);
void png_set_progressive_read_fn (png_structp png_ptr,
png_voidp progressive_ptr, png_progressive_info_ptr info_fn,
png_progressive_row_ptr row_fn, png_progressive_end_ptr
end_fn);
void png_set_PLTE (png_structp png_ptr, png_infop info_ptr,
png_colorp palette, int num_palette);
void png_set_read_fn (png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr read_data_fn);
void png_set_rgb_to_gray (png_structp png_ptr);
void png_set_sBIT (png_structp png_ptr, png_infop info_ptr,
png_color_8p sig_bit);
void png_set_shift (png_structp png_ptr, png_color_8p
true_bits);
void png_set_sig_bytes (png_structp png_ptr, int num_bytes);
void png_set_sRGB (png_structp png_ptr, png_infop info_ptr, int
intent);
void png_set_sRGB_gAMA_and_cHRM (png_structp png_ptr, png_infop
info_ptr, int intent);
void png_set_strip_16 (png_structp png_ptr);
void png_set_strip_alpha (png_structp png_ptr);
void png_set_swap (png_structp png_ptr);
void png_set_swap_alpha (png_structp png_ptr);
void png_set_text (png_structp png_ptr, png_infop info_ptr,
png_textp text_ptr, int num_text);
void png_set_tIME (png_structp png_ptr, png_infop info_ptr,
png_timep mod_time);
void png_set_tRNS (png_structp png_ptr, png_infop info_ptr,
png_bytep trans, int num_trans, png_color_16p trans_values);
void png_set_write_fn (png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn);
int png_sig_cmp (png_bytep sig, png_size_t start, png_size_t
num_to_check);
void png_start_read_image (png_structp png_ptr);
void png_warning (png_structp png_ptr, png_const_charp
message);
void png_write_bKGD (png_structp png_ptr, png_color_16p values,
int color_type);
void png_write_chunk (png_structp png_ptr, png_bytep
chunk_name, png_bytep data, png_size_t length);
void png_write_chunk_data (png_structp png_ptr, png_bytep data,
png_size_t length);
void png_write_chunk_end (png_structp png_ptr);
void png_write_chunk_start (png_structp png_ptr, png_bytep
chunk_name, png_uint_32 length);
void png_write_cHRM (png_structp png_ptr, double white_x,
double white_y, double red_x, double red_y, double green_x,
double green_y, double blue_x, double blue_y);
void png_write_data (png_structp png_ptr, png_bytep data,
png_size_t length);
void png_write_destroy (png_structp png_ptr);
void png_write_destroy_info (png_infop info_ptr);
void png_write_end (png_structp png_ptr, png_infop info_ptr);
void png_write_filtered_row (png_structp png_ptr, png_bytep
filtered_row);
void png_write_find_filter (png_structp png_ptr, png_row_infop
row_info);
void png_write_finish_row (png_structp png_ptr);
void png_write_flush (png_structp png_ptr);
void png_write_gAMA (png_structp png_ptr, double file_gamma);
void png_write_hIST (png_structp png_ptr, png_uint_16p hist,
int num_hist);
void png_write_image (png_structp png_ptr, png_bytepp image);
void png_write_info (png_structp png_ptr, png_infop info_ptr);
void png_write_init (png_structp png_ptr);
void png_write_IDAT (png_structp png_ptr, png_bytep data,
png_size_t length);
void png_write_IEND (png_structp png_ptr);
void png_write_IHDR (png_structp png_ptr, png_uint_32 width,
png_uint_32 height, int bit_depth, int color_type, int
compression_type, int filter_type, int interlace_type);
void png_write_oFFs (png_structp png_ptr, png_uint_32 x_offset,
png_uint_32 y_offset, int unit_type);
void png_write_pCAL (png_structp png_ptr, png_charp purpose,
png_int_32 X0, png_int_32 X1, int type, int nparams, png_charp
units, png_charpp params);
void png_write_pHYs (png_structp png_ptr, png_uint_32
x_pixels_per_unit, png_uint_32 y_pixels_per_unit, int
unit_type);
void png_write_PLTE (png_structp png_ptr, png_colorp palette,
png_uint_32 num_pal);
void png_write_row (png_structp png_ptr, png_bytep row);
void png_write_rows (png_structp png_ptr, png_bytepp row,
png_uint_32 num_rows);
void png_write_sBIT (png_structp png_ptr, png_color_8p sbit,
int color_type);
void png_write_sig (png_structp png_ptr);
void png_write_sRGB (png_structp png_ptr, int intent);
void png_write_start_row (png_structp png_ptr);
void png_write_tEXt (png_structp png_ptr, png_charp key,
png_charp text, png_size_t text_len);
void png_write_tIME (png_structp png_ptr, png_timep mod_time);
void png_write_tRNS (png_structp png_ptr, png_bytep trans,
png_color_16p values, int number, int color_type);
void png_write_zTXt (png_structp png_ptr, png_charp key,
png_charp text, png_size_t text_len, int compression);
voidpf png_zalloc (voidpf png_ptr, uInt items, uInt size);
void png_zfree (voidpf png_ptr, voidpf ptr);