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[LIBPNG]

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* Sync up to 1.5.9.

svn path=/trunk/; revision=55786
This commit is contained in:
Amine Khaldi 2012-02-21 18:17:50 +00:00
parent 12f0f9cfd6
commit a14929eb93
22 changed files with 7382 additions and 1449 deletions
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1
reactos/dll/3rdparty/libpng/CMakeLists.txt vendored
View file

@ -20,7 +20,6 @@ add_library(libpng SHARED
pngrtran.c
pngrutil.c
pngset.c
pngtest.c
pngtrans.c
pngwio.c
pngwrite.c

1
reactos/dll/3rdparty/libpng/libpng.rbuild vendored
View file

@ -19,7 +19,6 @@
<file>pngrtran.c</file>
<file>pngrutil.c</file>
<file>pngset.c</file>
<file>pngtest.c</file>
<file>pngtrans.c</file>
<file>pngwio.c</file>
<file>pngwrite.c</file>

204
reactos/dll/3rdparty/libpng/new_push_process_row.c vendored
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@ -1,204 +0,0 @@
void /* PRIVATE */
png_push_process_row(png_structp png_ptr)
{
png_ptr->row_info.color_type = png_ptr->color_type;
png_ptr->row_info.width = png_ptr->iwidth;
png_ptr->row_info.channels = png_ptr->channels;
png_ptr->row_info.bit_depth = png_ptr->bit_depth;
png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
png_ptr->row_info.width);
png_read_filter_row(png_ptr, &(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->prev_row + 1,
(int)(png_ptr->row_buf[0]));
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
png_do_read_transformations(png_ptr);
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Blow up interlaced rows to full size */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
/* old interface (pre-1.0.9):
png_do_read_interlace(&(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
*/
png_do_read_interlace(png_ptr);
switch (png_ptr->pass)
{
case 0:
{
int i;
for (i = 0; i < 8 && png_ptr->pass == 0; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr); /* Updates png_ptr->pass */
}
if (png_ptr->pass == 2) /* Pass 1 might be empty */
{
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
}
if (png_ptr->pass == 4 && png_ptr->height <= 4)
{
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
}
if (png_ptr->pass == 6 && png_ptr->height <= 4)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
break;
}
case 1:
{
int i;
for (i = 0; i < 8 && png_ptr->pass == 1; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
if (png_ptr->pass == 2) /* Skip top 4 generated rows */
{
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
}
break;
}
case 2:
{
int i;
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
if (png_ptr->pass == 4) /* Pass 3 might be empty */
{
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
}
break;
}
case 3:
{
int i;
for (i = 0; i < 4 && png_ptr->pass == 3; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
if (png_ptr->pass == 4) /* Skip top two generated rows */
{
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
}
break;
}
case 4:
{
int i;
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
if (png_ptr->pass == 6) /* Pass 5 might be empty */
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
break;
}
case 5:
{
int i;
for (i = 0; i < 2 && png_ptr->pass == 5; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
if (png_ptr->pass == 6) /* Skip top generated row */
{
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
break;
}
case 6:
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
if (png_ptr->pass != 6)
break;
png_push_have_row(png_ptr, NULL);
png_read_push_finish_row(png_ptr);
}
}
}
else
#endif
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
}

169
reactos/dll/3rdparty/libpng/png.c vendored
View file

@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
* Last changed in libpng 1.5.5 [September 22, 2011]
* Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -14,7 +14,7 @@
#include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */
typedef png_libpng_version_1_5_5 Your_png_h_is_not_version_1_5_5;
typedef png_libpng_version_1_5_9 Your_png_h_is_not_version_1_5_9;
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
@ -121,14 +121,14 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
{
int need_crc = 1;
if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name))
{
if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
need_crc = 0;
}
else /* critical */
else /* critical */
{
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
need_crc = 0;
@ -599,9 +599,19 @@ png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime)
if (png_ptr == NULL)
return (NULL);
if (ptime->year > 9999 /* RFC1123 limitation */ ||
ptime->month == 0 || ptime->month > 12 ||
ptime->day == 0 || ptime->day > 31 ||
ptime->hour > 23 || ptime->minute > 59 ||
ptime->second > 60)
{
png_warning(png_ptr, "Ignoring invalid time value");
return (NULL);
}
{
size_t pos = 0;
char number_buf[5]; /* enough for a four digit year */
char number_buf[5]; /* enough for a four-digit year */
# define APPEND_STRING(string)\
pos = png_safecat(png_ptr->time_buffer, sizeof png_ptr->time_buffer,\
@ -612,17 +622,17 @@ png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime)
if (pos < (sizeof png_ptr->time_buffer)-1)\
png_ptr->time_buffer[pos++] = (ch)
APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day % 32);
APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day);
APPEND(' ');
APPEND_STRING(short_months[(ptime->month - 1) % 12]);
APPEND_STRING(short_months[(ptime->month - 1)]);
APPEND(' ');
APPEND_NUMBER(PNG_NUMBER_FORMAT_u, ptime->year);
APPEND(' ');
APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->hour % 24);
APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->hour);
APPEND(':');
APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->minute % 60);
APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->minute);
APPEND(':');
APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second % 61);
APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second);
APPEND_STRING(" +0000"); /* This reliably terminates the buffer */
# undef APPEND
@ -645,13 +655,13 @@ png_get_copyright(png_const_structp png_ptr)
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
"libpng version 1.5.5 - September 22, 2011" PNG_STRING_NEWLINE \
"libpng version 1.5.9 - February 18, 2012" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
return "libpng version 1.5.5 - September 22, 2011\
return "libpng version 1.5.9 - February 18, 2012\
Copyright (c) 1998-2011 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@ -698,25 +708,43 @@ png_get_header_version(png_const_structp png_ptr)
#endif
}
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int PNGAPI
png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name)
{
/* Check chunk_name and return "keep" value if it's on the list, else 0 */
int i;
png_bytep p;
if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
return 0;
png_const_bytep p, p_end;
p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list <= 0)
return PNG_HANDLE_CHUNK_AS_DEFAULT;
p_end = png_ptr->chunk_list;
p = p_end + png_ptr->num_chunk_list*5; /* beyond end */
/* The code is the fifth byte after each four byte string. Historically this
* code was always searched from the end of the list, so it should continue
* to do so in case there are duplicated entries.
*/
do /* num_chunk_list > 0, so at least one */
{
p -= 5;
if (!png_memcmp(chunk_name, p, 4))
return ((int)*(p + 4));
return 0;
return p[4];
}
while (p > p_end);
return PNG_HANDLE_CHUNK_AS_DEFAULT;
}
# endif
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
int /* PRIVATE */
png_chunk_unknown_handling(png_structp png_ptr, png_uint_32 chunk_name)
{
png_byte chunk_string[5];
PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name);
return png_handle_as_unknown(png_ptr, chunk_string);
}
#endif
#ifdef PNG_READ_SUPPORTED
/* This function, added to libpng-1.0.6g, is untested. */
@ -2146,9 +2174,9 @@ png_64bit_product (long v1, long v2, unsigned long *hi_product,
static png_uint_32
png_8bit_l2[128] =
{
# if PNG_DO_BC
# ifdef PNG_DO_BC
for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; }
# endif
# else
4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U,
3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U,
3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U,
@ -2171,6 +2199,8 @@ png_8bit_l2[128] =
324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U,
172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U,
24347096U, 0U
# endif
#if 0
/* The following are the values for 16-bit tables - these work fine for the
* 8-bit conversions but produce very slightly larger errors in the 16-bit
@ -2305,7 +2335,7 @@ png_log16bit(png_uint_32 x)
* integer bits (the top 4) simply determine a shift.
*
* The worst case is the 16-bit distinction between 65535 and 65534, this
* requires perhaps spurious accuracty in the decoding of the logarithm to
* requires perhaps spurious accuracy in the decoding of the logarithm to
* distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance
* of getting this accuracy in practice.
*
@ -2316,17 +2346,18 @@ png_log16bit(png_uint_32 x)
static png_uint_32
png_32bit_exp[16] =
{
# if PNG_DO_BC
# ifdef PNG_DO_BC
for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; }
# endif
# else
/* NOTE: the first entry is deliberately set to the maximum 32-bit value. */
4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U,
3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U,
2553802834U, 2445529972U, 2341847524U, 2242560872U
# endif
};
/* Adjustment table; provided to explain the numbers in the code below. */
#if PNG_DO_BC
#ifdef PNG_DO_BC
for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"}
11 44937.64284865548751208448
10 45180.98734845585101160448
@ -2489,7 +2520,7 @@ png_gamma_significant(png_fixed_point gamma_val)
}
/* Internal function to build a single 16-bit table - the table consists of
* 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount
* 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount
* to shift the input values right (or 16-number_of_signifiant_bits).
*
* The caller is responsible for ensuring that the table gets cleaned up on
@ -2576,9 +2607,9 @@ png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable,
png_uint_16pp table = *ptable =
(png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
/* 'num' is the number of tables and also the number of low bits of low
* bits of the input 16-bit value used to select a table. Each table is
* itself index by the high 8 bits of the value.
/* 'num' is the number of tables and also the number of low bits of the
* input 16-bit value used to select a table. Each table is itself indexed
* by the high 8 bits of the value.
*/
for (i = 0; i < num; i++)
table[i] = (png_uint_16p)png_malloc(png_ptr,
@ -2629,7 +2660,7 @@ png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable,
/* Build a single 8-bit table: same as the 16-bit case but much simpler (and
* typically much faster). Note that libpng currently does no sBIT processing
* (apparently contrary to the spec) so a 256 entry table is always generated.
* (apparently contrary to the spec) so a 256-entry table is always generated.
*/
static void
png_build_8bit_table(png_structp png_ptr, png_bytepp ptable,
@ -2645,6 +2676,60 @@ png_build_8bit_table(png_structp png_ptr, png_bytepp ptable,
table[i] = (png_byte)i;
}
/* Used from png_read_destroy and below to release the memory used by the gamma
* tables.
*/
void /* PRIVATE */
png_destroy_gamma_table(png_structp png_ptr)
{
png_free(png_ptr, png_ptr->gamma_table);
png_ptr->gamma_table = NULL;
if (png_ptr->gamma_16_table != NULL)
{
int i;
int istop = (1 << (8 - png_ptr->gamma_shift));
for (i = 0; i < istop; i++)
{
png_free(png_ptr, png_ptr->gamma_16_table[i]);
}
png_free(png_ptr, png_ptr->gamma_16_table);
png_ptr->gamma_16_table = NULL;
}
#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
png_free(png_ptr, png_ptr->gamma_from_1);
png_ptr->gamma_from_1 = NULL;
png_free(png_ptr, png_ptr->gamma_to_1);
png_ptr->gamma_to_1 = NULL;
if (png_ptr->gamma_16_from_1 != NULL)
{
int i;
int istop = (1 << (8 - png_ptr->gamma_shift));
for (i = 0; i < istop; i++)
{
png_free(png_ptr, png_ptr->gamma_16_from_1[i]);
}
png_free(png_ptr, png_ptr->gamma_16_from_1);
png_ptr->gamma_16_from_1 = NULL;
}
if (png_ptr->gamma_16_to_1 != NULL)
{
int i;
int istop = (1 << (8 - png_ptr->gamma_shift));
for (i = 0; i < istop; i++)
{
png_free(png_ptr, png_ptr->gamma_16_to_1[i]);
}
png_free(png_ptr, png_ptr->gamma_16_to_1);
png_ptr->gamma_16_to_1 = NULL;
}
#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
}
/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit
* tables, we don't make a full table if we are reducing to 8-bit in
* the future. Note also how the gamma_16 tables are segmented so that
@ -2655,6 +2740,18 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth)
{
png_debug(1, "in png_build_gamma_table");
/* Remove any existing table; this copes with multiple calls to
* png_read_update_info. The warning is because building the gamma tables
* multiple times is a performance hit - it's harmless but the ability to call
* png_read_update_info() multiple times is new in 1.5.6 so it seems sensible
* to warn if the app introduces such a hit.
*/
if (png_ptr->gamma_table != NULL || png_ptr->gamma_16_table != NULL)
{
png_warning(png_ptr, "gamma table being rebuilt");
png_destroy_gamma_table(png_ptr);
}
if (bit_depth <= 8)
{
png_build_8bit_table(png_ptr, &png_ptr->gamma_table,
@ -2699,7 +2796,7 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth)
* Where 'iv' is the input color value and 'ov' is the output value -
* pow(iv, gamma).
*
* Thus the gamma table consists of up to 256 256 entry tables. The table
* Thus the gamma table consists of up to 256 256-entry tables. The table
* is selected by the (8-gamma_shift) most significant of the low 8 bits of
* the color value then indexed by the upper 8 bits:
*

2658
reactos/dll/3rdparty/libpng/png.h vendored Normal file
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File diff suppressed because it is too large Load diff

596
reactos/dll/3rdparty/libpng/pngconf.h vendored Normal file
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@ -0,0 +1,596 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.5.9 - February 18, 2012
*
* Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
*/
/* Any machine specific code is near the front of this file, so if you
* are configuring libpng for a machine, you may want to read the section
* starting here down to where it starts to typedef png_color, png_text,
* and png_info.
*/
#ifndef PNGCONF_H
#define PNGCONF_H
#ifndef PNG_BUILDING_SYMBOL_TABLE
/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
* definition file for machine specific limits, this may impact the
* correctness of the definitons below (see uses of INT_MAX).
*/
# ifndef PNG_NO_LIMITS_H
# include <limits.h>
# endif
/* For the memory copy APIs (i.e. the standard definitions of these),
* because this file defines png_memcpy and so on the base APIs must
* be defined here.
*/
# ifdef BSD
# include <strings.h>
# else
# include <string.h>
# endif
/* For png_FILE_p - this provides the standard definition of a
* FILE
*/
# ifdef PNG_STDIO_SUPPORTED
# include <stdio.h>
# endif
#endif
/* This controls optimization of the reading of 16 and 32 bit values
* from PNG files. It can be set on a per-app-file basis - it
* just changes whether a macro is used to the function is called.
* The library builder sets the default, if read functions are not
* built into the library the macro implementation is forced on.
*/
#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
# define PNG_USE_READ_MACROS
#endif
#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
# if PNG_DEFAULT_READ_MACROS
# define PNG_USE_READ_MACROS
# endif
#endif
/* COMPILER SPECIFIC OPTIONS.
*
* These options are provided so that a variety of difficult compilers
* can be used. Some are fixed at build time (e.g. PNG_API_RULE
* below) but still have compiler specific implementations, others
* may be changed on a per-file basis when compiling against libpng.
*/
/* The PNGARG macro protects us against machines that don't have function
* prototypes (ie K&R style headers). If your compiler does not handle
* function prototypes, define this macro and use the included ansi2knr.
* I've always been able to use _NO_PROTO as the indicator, but you may
* need to drag the empty declaration out in front of here, or change the
* ifdef to suit your own needs.
*/
#ifndef PNGARG
# ifdef OF /* zlib prototype munger */
# define PNGARG(arglist) OF(arglist)
# else
# ifdef _NO_PROTO
# define PNGARG(arglist) ()
# else
# define PNGARG(arglist) arglist
# endif /* _NO_PROTO */
# endif /* OF */
#endif /* PNGARG */
/* Function calling conventions.
* =============================
* Normally it is not necessary to specify to the compiler how to call
* a function - it just does it - however on x86 systems derived from
* Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
* and some others) there are multiple ways to call a function and the
* default can be changed on the compiler command line. For this reason
* libpng specifies the calling convention of every exported function and
* every function called via a user supplied function pointer. This is
* done in this file by defining the following macros:
*
* PNGAPI Calling convention for exported functions.
* PNGCBAPI Calling convention for user provided (callback) functions.
* PNGCAPI Calling convention used by the ANSI-C library (required
* for longjmp callbacks and sometimes used internally to
* specify the calling convention for zlib).
*
* These macros should never be overridden. If it is necessary to
* change calling convention in a private build this can be done
* by setting PNG_API_RULE (which defaults to 0) to one of the values
* below to select the correct 'API' variants.
*
* PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
* This is correct in every known environment.
* PNG_API_RULE=1 Use the operating system convention for PNGAPI and
* the 'C' calling convention (from PNGCAPI) for
* callbacks (PNGCBAPI). This is no longer required
* in any known environment - if it has to be used
* please post an explanation of the problem to the
* libpng mailing list.
*
* These cases only differ if the operating system does not use the C
* calling convention, at present this just means the above cases
* (x86 DOS/Windows sytems) and, even then, this does not apply to
* Cygwin running on those systems.
*
* Note that the value must be defined in pnglibconf.h so that what
* the application uses to call the library matches the conventions
* set when building the library.
*/
/* Symbol export
* =============
* When building a shared library it is almost always necessary to tell
* the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
* is used to mark the symbols. On some systems these symbols can be
* extracted at link time and need no special processing by the compiler,
* on other systems the symbols are flagged by the compiler and just
* the declaration requires a special tag applied (unfortunately) in a
* compiler dependent way. Some systems can do either.
*
* A small number of older systems also require a symbol from a DLL to
* be flagged to the program that calls it. This is a problem because
* we do not know in the header file included by application code that
* the symbol will come from a shared library, as opposed to a statically
* linked one. For this reason the application must tell us by setting
* the magic flag PNG_USE_DLL to turn on the special processing before
* it includes png.h.
*
* Four additional macros are used to make this happen:
*
* PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
* the build or imported if PNG_USE_DLL is set - compiler
* and system specific.
*
* PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
* 'type', compiler specific.
*
* PNG_DLL_EXPORT Set to the magic to use during a libpng build to
* make a symbol exported from the DLL. Not used in the
* public header files; see pngpriv.h for how it is used
* in the libpng build.
*
* PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
* from a DLL - used to define PNG_IMPEXP when
* PNG_USE_DLL is set.
*/
/* System specific discovery.
* ==========================
* This code is used at build time to find PNG_IMPEXP, the API settings
* and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
* import processing is possible. On Windows/x86 systems it also sets
* compiler-specific macros to the values required to change the calling
* conventions of the various functions.
*/
#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
defined(_M_X64) || defined(_M_IA64) )
/* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes
* builds under Cygwin or MinGW. Also includes Watcom builds but these need
* special treatment because they are not compatible with GCC or Visual C
* because of different calling conventions.
*/
# if PNG_API_RULE == 2
/* If this line results in an error, either because __watcall is not
* understood or because of a redefine just below you cannot use *this*
* build of the library with the compiler you are using. *This* build was
* build using Watcom and applications must also be built using Watcom!
*/
# define PNGCAPI __watcall
# endif
# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
# define PNGCAPI __cdecl
# if PNG_API_RULE == 1
# define PNGAPI __stdcall
# endif
# else
/* An older compiler, or one not detected (erroneously) above,
* if necessary override on the command line to get the correct
* variants for the compiler.
*/
# ifndef PNGCAPI
# define PNGCAPI _cdecl
# endif
# if PNG_API_RULE == 1 && !defined(PNGAPI)
# define PNGAPI _stdcall
# endif
# endif /* compiler/api */
/* NOTE: PNGCBAPI always defaults to PNGCAPI. */
# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
# endif
# if (defined(_MSC_VER) && _MSC_VER < 800) ||\
(defined(__BORLANDC__) && __BORLANDC__ < 0x500)
/* older Borland and MSC
* compilers used '__export' and required this to be after
* the type.
*/
# ifndef PNG_EXPORT_TYPE
# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
# endif
# define PNG_DLL_EXPORT __export
# else /* newer compiler */
# define PNG_DLL_EXPORT __declspec(dllexport)
# ifndef PNG_DLL_IMPORT
# define PNG_DLL_IMPORT __declspec(dllimport)
# endif
# endif /* compiler */
#else /* !Windows/x86 */
# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
# define PNGAPI _System
# else /* !Windows/x86 && !OS/2 */
/* Use the defaults, or define PNG*API on the command line (but
* this will have to be done for every compile!)
*/
# endif /* other system, !OS/2 */
#endif /* !Windows/x86 */
/* Now do all the defaulting . */
#ifndef PNGCAPI
# define PNGCAPI
#endif
#ifndef PNGCBAPI
# define PNGCBAPI PNGCAPI
#endif
#ifndef PNGAPI
# define PNGAPI PNGCAPI
#endif
/* PNG_IMPEXP may be set on the compilation system command line or (if not set)
* then in an internal header file when building the library, otherwise (when
* using the library) it is set here.
*/
#ifndef PNG_IMPEXP
# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
/* This forces use of a DLL, disallowing static linking */
# define PNG_IMPEXP PNG_DLL_IMPORT
# endif
# ifndef PNG_IMPEXP
# define PNG_IMPEXP
# endif
#endif
/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
* 'attributes' as a storage class - the attributes go at the start of the
* function definition, and attributes are always appended regardless of the
* compiler. This considerably simplifies these macros but may cause problems
* if any compilers both need function attributes and fail to handle them as
* a storage class (this is unlikely.)
*/
#ifndef PNG_FUNCTION
# define PNG_FUNCTION(type, name, args, attributes) attributes type name args
#endif
#ifndef PNG_EXPORT_TYPE
# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
#endif
/* The ordinal value is only relevant when preprocessing png.h for symbol
* table entries, so we discard it here. See the .dfn files in the
* scripts directory.
*/
#ifndef PNG_EXPORTA
# define PNG_EXPORTA(ordinal, type, name, args, attributes)\
PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
extern attributes)
#endif
/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
* so make something non-empty to satisfy the requirement:
*/
#define PNG_EMPTY /*empty list*/
#define PNG_EXPORT(ordinal, type, name, args)\
PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
/* Use PNG_REMOVED to comment out a removed interface. */
#ifndef PNG_REMOVED
# define PNG_REMOVED(ordinal, type, name, args, attributes)
#endif
#ifndef PNG_CALLBACK
# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
#endif
/* Support for compiler specific function attributes. These are used
* so that where compiler support is available incorrect use of API
* functions in png.h will generate compiler warnings.
*
* Added at libpng-1.2.41.
*/
#ifndef PNG_NO_PEDANTIC_WARNINGS
# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
# define PNG_PEDANTIC_WARNINGS_SUPPORTED
# endif
#endif
#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
/* Support for compiler specific function attributes. These are used
* so that where compiler support is available incorrect use of API
* functions in png.h will generate compiler warnings. Added at libpng
* version 1.2.41.
*/
# if defined(__GNUC__)
# ifndef PNG_USE_RESULT
# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
# endif
# ifndef PNG_NORETURN
# define PNG_NORETURN __attribute__((__noreturn__))
# endif
# ifndef PNG_ALLOCATED
# define PNG_ALLOCATED __attribute__((__malloc__))
# endif
# ifndef PNG_DEPRECATED
# define PNG_DEPRECATED __attribute__((__deprecated__))
# endif
# ifndef PNG_PRIVATE
# if 0 /* Doesn't work so we use deprecated instead*/
# define PNG_PRIVATE \
__attribute__((warning("This function is not exported by libpng.")))
# else
# define PNG_PRIVATE \
__attribute__((__deprecated__))
# endif
# endif
# endif /* __GNUC__ */
# if defined(_MSC_VER) && (_MSC_VER >= 1300)
# ifndef PNG_USE_RESULT
# define PNG_USE_RESULT /* not supported */
# endif
# ifndef PNG_NORETURN
# define PNG_NORETURN __declspec(noreturn)
# endif
# ifndef PNG_ALLOCATED
# if (_MSC_VER >= 1400)
# define PNG_ALLOCATED __declspec(restrict)
# endif
# endif
# ifndef PNG_DEPRECATED
# define PNG_DEPRECATED __declspec(deprecated)
# endif
# ifndef PNG_PRIVATE
# define PNG_PRIVATE __declspec(deprecated)
# endif
# endif /* _MSC_VER */
#endif /* PNG_PEDANTIC_WARNINGS */
#ifndef PNG_DEPRECATED
# define PNG_DEPRECATED /* Use of this function is deprecated */
#endif
#ifndef PNG_USE_RESULT
# define PNG_USE_RESULT /* The result of this function must be checked */
#endif
#ifndef PNG_NORETURN
# define PNG_NORETURN /* This function does not return */
#endif
#ifndef PNG_ALLOCATED
# define PNG_ALLOCATED /* The result of the function is new memory */
#endif
#ifndef PNG_PRIVATE
# define PNG_PRIVATE /* This is a private libpng function */
#endif
#ifndef PNG_FP_EXPORT /* A floating point API. */
# ifdef PNG_FLOATING_POINT_SUPPORTED
# define PNG_FP_EXPORT(ordinal, type, name, args)\
PNG_EXPORT(ordinal, type, name, args)
# else /* No floating point APIs */
# define PNG_FP_EXPORT(ordinal, type, name, args)
# endif
#endif
#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
# ifdef PNG_FIXED_POINT_SUPPORTED
# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
PNG_EXPORT(ordinal, type, name, args)
# else /* No fixed point APIs */
# define PNG_FIXED_EXPORT(ordinal, type, name, args)
# endif
#endif
/* The following uses const char * instead of char * for error
* and warning message functions, so some compilers won't complain.
* If you do not want to use const, define PNG_NO_CONST here.
*
* This should not change how the APIs are called, so it can be done
* on a per-file basis in the application.
*/
#ifndef PNG_CONST
# ifndef PNG_NO_CONST
# define PNG_CONST const
# else
# define PNG_CONST
# endif
#endif
/* Some typedefs to get us started. These should be safe on most of the
* common platforms. The typedefs should be at least as large as the
* numbers suggest (a png_uint_32 must be at least 32 bits long), but they
* don't have to be exactly that size. Some compilers dislike passing
* unsigned shorts as function parameters, so you may be better off using
* unsigned int for png_uint_16.
*/
#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)
typedef unsigned int png_uint_32;
typedef int png_int_32;
#else
typedef unsigned long png_uint_32;
typedef long png_int_32;
#endif
typedef unsigned short png_uint_16;
typedef short png_int_16;
typedef unsigned char png_byte;
#ifdef PNG_NO_SIZE_T
typedef unsigned int png_size_t;
#else
typedef size_t png_size_t;
#endif
#define png_sizeof(x) (sizeof (x))
/* The following is needed for medium model support. It cannot be in the
* pngpriv.h header. Needs modification for other compilers besides
* MSC. Model independent support declares all arrays and pointers to be
* large using the far keyword. The zlib version used must also support
* model independent data. As of version zlib 1.0.4, the necessary changes
* have been made in zlib. The USE_FAR_KEYWORD define triggers other
* changes that are needed. (Tim Wegner)
*/
/* Separate compiler dependencies (problem here is that zlib.h always
* defines FAR. (SJT)
*/
#ifdef __BORLANDC__
# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
# define LDATA 1
# else
# define LDATA 0
# endif
/* GRR: why is Cygwin in here? Cygwin is not Borland C... */
# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
# define PNG_MAX_MALLOC_64K /* only used in build */
# if (LDATA != 1)
# ifndef FAR
# define FAR __far
# endif
# define USE_FAR_KEYWORD
# endif /* LDATA != 1 */
/* Possibly useful for moving data out of default segment.
* Uncomment it if you want. Could also define FARDATA as
* const if your compiler supports it. (SJT)
# define FARDATA FAR
*/
# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
#endif /* __BORLANDC__ */
/* Suggest testing for specific compiler first before testing for
* FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
* making reliance oncertain keywords suspect. (SJT)
*/
/* MSC Medium model */
#ifdef FAR
# ifdef M_I86MM
# define USE_FAR_KEYWORD
# define FARDATA FAR
# include <dos.h>
# endif
#endif
/* SJT: default case */
#ifndef FAR
# define FAR
#endif
/* At this point FAR is always defined */
#ifndef FARDATA
# define FARDATA
#endif
/* Typedef for floating-point numbers that are converted
* to fixed-point with a multiple of 100,000, e.g., gamma
*/
typedef png_int_32 png_fixed_point;
/* Add typedefs for pointers */
typedef void FAR * png_voidp;
typedef PNG_CONST void FAR * png_const_voidp;
typedef png_byte FAR * png_bytep;
typedef PNG_CONST png_byte FAR * png_const_bytep;
typedef png_uint_32 FAR * png_uint_32p;
typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p;
typedef png_int_32 FAR * png_int_32p;
typedef PNG_CONST png_int_32 FAR * png_const_int_32p;
typedef png_uint_16 FAR * png_uint_16p;
typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p;
typedef png_int_16 FAR * png_int_16p;
typedef PNG_CONST png_int_16 FAR * png_const_int_16p;
typedef char FAR * png_charp;
typedef PNG_CONST char FAR * png_const_charp;
typedef png_fixed_point FAR * png_fixed_point_p;
typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;
typedef png_size_t FAR * png_size_tp;
typedef PNG_CONST png_size_t FAR * png_const_size_tp;
#ifdef PNG_STDIO_SUPPORTED
typedef FILE * png_FILE_p;
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
typedef double FAR * png_doublep;
typedef PNG_CONST double FAR * png_const_doublep;
#endif
/* Pointers to pointers; i.e. arrays */
typedef png_byte FAR * FAR * png_bytepp;
typedef png_uint_32 FAR * FAR * png_uint_32pp;
typedef png_int_32 FAR * FAR * png_int_32pp;
typedef png_uint_16 FAR * FAR * png_uint_16pp;
typedef png_int_16 FAR * FAR * png_int_16pp;
typedef PNG_CONST char FAR * FAR * png_const_charpp;
typedef char FAR * FAR * png_charpp;
typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
#ifdef PNG_FLOATING_POINT_SUPPORTED
typedef double FAR * FAR * png_doublepp;
#endif
/* Pointers to pointers to pointers; i.e., pointer to array */
typedef char FAR * FAR * FAR * png_charppp;
/* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
* and no smaller than png_uint_32. Casts from png_size_t or png_uint_32
* to png_alloc_size_t are not necessary; in fact, it is recommended
* not to use them at all so that the compiler can complain when something
* turns out to be problematic.
* Casts in the other direction (from png_alloc_size_t to png_size_t or
* png_uint_32) should be explicitly applied; however, we do not expect
* to encounter practical situations that require such conversions.
*/
#if defined(__TURBOC__) && !defined(__FLAT__)
typedef unsigned long png_alloc_size_t;
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
typedef unsigned long png_alloc_size_t;
# else
/* This is an attempt to detect an old Windows system where (int) is
* actually 16 bits, in that case png_malloc must have an argument with a
* bigger size to accomodate the requirements of the library.
*/
# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \
(!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)
typedef DWORD png_alloc_size_t;
# else
typedef png_size_t png_alloc_size_t;
# endif
# endif
#endif
#endif /* PNGCONF_H */

157
reactos/dll/3rdparty/libpng/pngdebug.h vendored Normal file
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@ -0,0 +1,157 @@
/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
*
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* Last changed in libpng 1.5.0 [January 6, 2011]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*/
/* Define PNG_DEBUG at compile time for debugging information. Higher
* numbers for PNG_DEBUG mean more debugging information. This has
* only been added since version 0.95 so it is not implemented throughout
* libpng yet, but more support will be added as needed.
*
* png_debug[1-2]?(level, message ,arg{0-2})
* Expands to a statement (either a simple expression or a compound
* do..while(0) statement) that outputs a message with parameter
* substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG
* is undefined, 0 or 1 every png_debug expands to a simple expression
* (actually ((void)0)).
*
* level: level of detail of message, starting at 0. A level 'n'
* message is preceded by 'n' tab characters (not implemented
* on Microsoft compilers unless PNG_DEBUG_FILE is also
* defined, to allow debug DLL compilation with no standard IO).
* message: a printf(3) style text string. A trailing '\n' is added
* to the message.
* arg: 0 to 2 arguments for printf(3) style substitution in message.
*/
#ifndef PNGDEBUG_H
#define PNGDEBUG_H
/* These settings control the formatting of messages in png.c and pngerror.c */
/* Moved to pngdebug.h at 1.5.0 */
# ifndef PNG_LITERAL_SHARP
# define PNG_LITERAL_SHARP 0x23
# endif
# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
# endif
# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
# endif
# ifndef PNG_STRING_NEWLINE
# define PNG_STRING_NEWLINE "\n"
# endif
#ifdef PNG_DEBUG
# if (PNG_DEBUG > 0)
# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
# include <crtdbg.h>
# if (PNG_DEBUG > 1)
# ifndef _DEBUG
# define _DEBUG
# endif
# ifndef png_debug
# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
# endif
# ifndef png_debug1
# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
# endif
# ifndef png_debug2
# define png_debug2(l,m,p1,p2) \
_RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
# endif
# endif
# else /* PNG_DEBUG_FILE || !_MSC_VER */
# ifndef PNG_STDIO_SUPPORTED
# include <stdio.h> /* not included yet */
# endif
# ifndef PNG_DEBUG_FILE
# define PNG_DEBUG_FILE stderr
# endif /* PNG_DEBUG_FILE */
# if (PNG_DEBUG > 1)
/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
* non-ISO compilers
*/
# ifdef __STDC__
# ifndef png_debug
# define png_debug(l,m) \
do { \
int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
} while (0)
# endif
# ifndef png_debug1
# define png_debug1(l,m,p1) \
do { \
int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
} while (0)
# endif
# ifndef png_debug2
# define png_debug2(l,m,p1,p2) \
do { \
int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
} while (0)
# endif
# else /* __STDC __ */
# ifndef png_debug
# define png_debug(l,m) \
do { \
int num_tabs=l; \
char format[256]; \
snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
m,PNG_STRING_NEWLINE); \
fprintf(PNG_DEBUG_FILE,format); \
} while (0)
# endif
# ifndef png_debug1
# define png_debug1(l,m,p1) \
do { \
int num_tabs=l; \
char format[256]; \
snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
m,PNG_STRING_NEWLINE); \
fprintf(PNG_DEBUG_FILE,format,p1); \
} while (0)
# endif
# ifndef png_debug2
# define png_debug2(l,m,p1,p2) \
do { \
int num_tabs=l; \
char format[256]; \
snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
m,PNG_STRING_NEWLINE); \
fprintf(PNG_DEBUG_FILE,format,p1,p2); \
} while (0)
# endif
# endif /* __STDC __ */
# endif /* (PNG_DEBUG > 1) */
# endif /* _MSC_VER */
# endif /* (PNG_DEBUG > 0) */
#endif /* PNG_DEBUG */
#ifndef png_debug
# define png_debug(l, m) ((void)0)
#endif
#ifndef png_debug1
# define png_debug1(l, m, p1) ((void)0)
#endif
#ifndef png_debug2
# define png_debug2(l, m, p1, p2) ((void)0)
#endif
#endif /* PNGDEBUG_H */

83
reactos/dll/3rdparty/libpng/pngerror.c vendored
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@ -1,8 +1,8 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* Last changed in libpng 1.5.4 [July 7, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* Last changed in libpng 1.5.8 [February 1, 2011]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@ -281,35 +281,40 @@ void
png_formatted_warning(png_structp png_ptr, png_warning_parameters p,
png_const_charp message)
{
/* The internal buffer is just 128 bytes - enough for all our messages,
* overflow doesn't happen because this code checks!
/* The internal buffer is just 192 bytes - enough for all our messages,
* overflow doesn't happen because this code checks! If someone figures
* out how to send us a message longer than 192 bytes, all that will
* happen is that the message will be truncated appropriately.
*/
size_t i;
char msg[128];
size_t i = 0; /* Index in the msg[] buffer: */
char msg[192];
for (i=0; i<(sizeof msg)-1 && *message != '\0'; ++i)
/* Each iteration through the following loop writes at most one character
* to msg[i++] then returns here to validate that there is still space for
* the trailing '\0'. It may (in the case of a parameter) read more than
* one character from message[]; it must check for '\0' and continue to the
* test if it finds the end of string.
*/
while (i<(sizeof msg)-1 && *message != '\0')
{
if (*message == '@')
/* '@' at end of string is now just printed (previously it was skipped);
* it is an error in the calling code to terminate the string with @.
*/
if (p != NULL && *message == '@' && message[1] != '\0')
{
int parameter = -1;
switch (*++message)
{
case '1':
parameter = 0;
break;
int parameter_char = *++message; /* Consume the '@' */
static const char valid_parameters[] = "123456789";
int parameter = 0;
case '2':
parameter = 1;
break;
/* Search for the parameter digit, the index in the string is the
* parameter to use.
*/
while (valid_parameters[parameter] != parameter_char &&
valid_parameters[parameter] != '\0')
++parameter;
case '\0':
continue; /* To break out of the for loop above. */
default:
break;
}
if (parameter >= 0 && parameter < PNG_WARNING_PARAMETER_COUNT)
/* If the parameter digit is out of range it will just get printed. */
if (parameter < PNG_WARNING_PARAMETER_COUNT)
{
/* Append this parameter */
png_const_charp parm = p[parameter];
@ -319,28 +324,32 @@ png_formatted_warning(png_structp png_ptr, png_warning_parameters p,
* that parm[] has been initialized, so there is no guarantee of a
* trailing '\0':
*/
for (; i<(sizeof msg)-1 && parm != '\0' && parm < pend; ++i)
msg[i] = *parm++;
while (i<(sizeof msg)-1 && *parm != '\0' && parm < pend)
msg[i++] = *parm++;
/* Consume the parameter digit too: */
++message;
continue;
}
/* else not a parameter and there is a character after the @ sign; just
* copy that.
* copy that. This is known not to be '\0' because of the test above.
*/
}
/* At this point *message can't be '\0', even in the bad parameter case
* above where there is a lone '@' at the end of the message string.
*/
msg[i] = *message++;
msg[i++] = *message++;
}
/* i is always less than (sizeof msg), so: */
msg[i] = '\0';
/* And this is the formatted message: */
/* And this is the formatted message, it may be larger than
* PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these are
* not (currently) formatted.
*/
png_warning(png_ptr, msg);
}
#endif /* PNG_WARNINGS_SUPPORTED */
@ -374,11 +383,14 @@ static void /* PRIVATE */
png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
error_message)
{
int iout = 0, iin = 0;
png_uint_32 chunk_name = png_ptr->chunk_name;
int iout = 0, ishift = 24;
while (iin < 4)
while (ishift >= 0)
{
int c = png_ptr->chunk_name[iin++];
int c = (int)(chunk_name >> ishift) & 0xff;
ishift -= 8;
if (isnonalpha(c))
{
buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET;
@ -389,7 +401,7 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
else
{
buffer[iout++] = (png_byte)c;
buffer[iout++] = (char)c;
}
}
@ -398,10 +410,11 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
else
{
int iin = 0;
buffer[iout++] = ':';
buffer[iout++] = ' ';
iin = 0;
while (iin < PNG_MAX_ERROR_TEXT-1 && error_message[iin] != '\0')
buffer[iout++] = error_message[iin++];

23
reactos/dll/3rdparty/libpng/pngget.c vendored
View file

@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct
*
* Last changed in libpng 1.5.5 [September 22, 2011]
* Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -682,15 +682,16 @@ png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr,
png_debug1(1, "in %s retrieval function", "iCCP");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
&& name != NULL && profile != NULL && proflen != NULL)
&& name != NULL && compression_type != NULL && profile != NULL &&
proflen != NULL)
{
*name = info_ptr->iccp_name;
*profile = info_ptr->iccp_profile;
/* Compression_type is a dummy so the API won't have to change
* if we introduce multiple compression types later.
*/
*proflen = (int)info_ptr->iccp_proflen;
*compression_type = (int)info_ptr->iccp_compression;
*proflen = info_ptr->iccp_proflen;
*compression_type = info_ptr->iccp_compression;
return (PNG_INFO_iCCP);
}
@ -950,9 +951,8 @@ png_get_text(png_const_structp png_ptr, png_const_infop info_ptr,
{
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
{
png_debug1(1, "in %s retrieval function",
(png_ptr->chunk_name[0] == '\0' ? "text" :
(png_const_charp)png_ptr->chunk_name));
png_debug1(1, "in 0x%lx retrieval function",
(unsigned long)png_ptr->chunk_name);
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
@ -1069,7 +1069,6 @@ png_get_compression_buffer_size(png_const_structp png_ptr)
return (png_ptr ? png_ptr->zbuf_size : 0);
}
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* These functions were added to libpng 1.2.6 and were enabled
* by default in libpng-1.4.0 */
@ -1111,16 +1110,14 @@ png_get_io_state (png_structp png_ptr)
png_uint_32 PNGAPI
png_get_io_chunk_type (png_const_structp png_ptr)
{
return ((png_ptr->chunk_name[0] << 24) +
(png_ptr->chunk_name[1] << 16) +
(png_ptr->chunk_name[2] << 8) +
(png_ptr->chunk_name[3]));
return png_ptr->chunk_name;
}
png_const_bytep PNGAPI
png_get_io_chunk_name (png_structp png_ptr)
{
return png_ptr->chunk_name;
PNG_CSTRING_FROM_CHUNK(png_ptr->io_chunk_string, png_ptr->chunk_name);
return png_ptr->io_chunk_string;
}
#endif /* ?PNG_IO_STATE_SUPPORTED */

269
reactos/dll/3rdparty/libpng/pnginfo.h vendored Normal file
View file

@ -0,0 +1,269 @@
/* pnginfo.h - header file for PNG reference library
*
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* Last changed in libpng 1.5.0 [January 6, 2011]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*/
/* png_info is a structure that holds the information in a PNG file so
* that the application can find out the characteristics of the image.
* If you are reading the file, this structure will tell you what is
* in the PNG file. If you are writing the file, fill in the information
* you want to put into the PNG file, using png_set_*() functions, then
* call png_write_info().
*
* The names chosen should be very close to the PNG specification, so
* consult that document for information about the meaning of each field.
*
* With libpng < 0.95, it was only possible to directly set and read the
* the values in the png_info_struct, which meant that the contents and
* order of the values had to remain fixed. With libpng 0.95 and later,
* however, there are now functions that abstract the contents of
* png_info_struct from the application, so this makes it easier to use
* libpng with dynamic libraries, and even makes it possible to use
* libraries that don't have all of the libpng ancillary chunk-handing
* functionality. In libpng-1.5.0 this was moved into a separate private
* file that is not visible to applications.
*
* The following members may have allocated storage attached that should be
* cleaned up before the structure is discarded: palette, trans, text,
* pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
* splt_palettes, scal_unit, row_pointers, and unknowns. By default, these
* are automatically freed when the info structure is deallocated, if they were
* allocated internally by libpng. This behavior can be changed by means
* of the png_data_freer() function.
*
* More allocation details: all the chunk-reading functions that
* change these members go through the corresponding png_set_*
* functions. A function to clear these members is available: see
* png_free_data(). The png_set_* functions do not depend on being
* able to point info structure members to any of the storage they are
* passed (they make their own copies), EXCEPT that the png_set_text
* functions use the same storage passed to them in the text_ptr or
* itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
* functions do not make their own copies.
*/
#ifndef PNGINFO_H
#define PNGINFO_H
struct png_info_def
{
/* the following are necessary for every PNG file */
png_uint_32 width; /* width of image in pixels (from IHDR) */
png_uint_32 height; /* height of image in pixels (from IHDR) */
png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */
png_size_t rowbytes; /* bytes needed to hold an untransformed row */
png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */
png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */
png_uint_16 num_trans; /* number of transparent palette color (tRNS) */
png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */
png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */
/* The following three should have been named *_method not *_type */
png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */
png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */
png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
/* The following is informational only on read, and not used on writes. */
png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */
png_byte pixel_depth; /* number of bits per pixel */
png_byte spare_byte; /* to align the data, and for future use */
png_byte signature[8]; /* magic bytes read by libpng from start of file */
/* The rest of the data is optional. If you are reading, check the
* valid field to see if the information in these are valid. If you
* are writing, set the valid field to those chunks you want written,
* and initialize the appropriate fields below.
*/
#if defined(PNG_gAMA_SUPPORTED)
/* The gAMA chunk describes the gamma characteristics of the system
* on which the image was created, normally in the range [1.0, 2.5].
* Data is valid if (valid & PNG_INFO_gAMA) is non-zero.
*/
png_fixed_point gamma;
#endif
#ifdef PNG_sRGB_SUPPORTED
/* GR-P, 0.96a */
/* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */
#endif
#ifdef PNG_TEXT_SUPPORTED
/* The tEXt, and zTXt chunks contain human-readable textual data in
* uncompressed, compressed, and optionally compressed forms, respectively.
* The data in "text" is an array of pointers to uncompressed,
* null-terminated C strings. Each chunk has a keyword that describes the
* textual data contained in that chunk. Keywords are not required to be
* unique, and the text string may be empty. Any number of text chunks may
* be in an image.
*/
int num_text; /* number of comments read or comments to write */
int max_text; /* current size of text array */
png_textp text; /* array of comments read or comments to write */
#endif /* PNG_TEXT_SUPPORTED */
#ifdef PNG_tIME_SUPPORTED
/* The tIME chunk holds the last time the displayed image data was
* modified. See the png_time struct for the contents of this struct.
*/
png_time mod_time;
#endif
#ifdef PNG_sBIT_SUPPORTED
/* The sBIT chunk specifies the number of significant high-order bits
* in the pixel data. Values are in the range [1, bit_depth], and are
* only specified for the channels in the pixel data. The contents of
* the low-order bits is not specified. Data is valid if
* (valid & PNG_INFO_sBIT) is non-zero.
*/
png_color_8 sig_bit; /* significant bits in color channels */
#endif
#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
defined(PNG_READ_BACKGROUND_SUPPORTED)
/* The tRNS chunk supplies transparency data for paletted images and
* other image types that don't need a full alpha channel. There are
* "num_trans" transparency values for a paletted image, stored in the
* same order as the palette colors, starting from index 0. Values
* for the data are in the range [0, 255], ranging from fully transparent
* to fully opaque, respectively. For non-paletted images, there is a
* single color specified that should be treated as fully transparent.
* Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
*/
png_bytep trans_alpha; /* alpha values for paletted image */
png_color_16 trans_color; /* transparent color for non-palette image */
#endif
#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
/* The bKGD chunk gives the suggested image background color if the
* display program does not have its own background color and the image
* is needs to composited onto a background before display. The colors
* in "background" are normally in the same color space/depth as the
* pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
*/
png_color_16 background;
#endif
#ifdef PNG_oFFs_SUPPORTED
/* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
* and downwards from the top-left corner of the display, page, or other
* application-specific co-ordinate space. See the PNG_OFFSET_ defines
* below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero.
*/
png_int_32 x_offset; /* x offset on page */
png_int_32 y_offset; /* y offset on page */
png_byte offset_unit_type; /* offset units type */
#endif
#ifdef PNG_pHYs_SUPPORTED
/* The pHYs chunk gives the physical pixel density of the image for
* display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
* defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
*/
png_uint_32 x_pixels_per_unit; /* horizontal pixel density */
png_uint_32 y_pixels_per_unit; /* vertical pixel density */
png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
#endif
#ifdef PNG_hIST_SUPPORTED
/* The hIST chunk contains the relative frequency or importance of the
* various palette entries, so that a viewer can intelligently select a
* reduced-color palette, if required. Data is an array of "num_palette"
* values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST)
* is non-zero.
*/
png_uint_16p hist;
#endif
#ifdef PNG_cHRM_SUPPORTED
/* The cHRM chunk describes the CIE color characteristics of the monitor
* on which the PNG was created. This data allows the viewer to do gamut
* mapping of the input image to ensure that the viewer sees the same
* colors in the image as the creator. Values are in the range
* [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero.
*/
png_fixed_point x_white;
png_fixed_point y_white;
png_fixed_point x_red;
png_fixed_point y_red;
png_fixed_point x_green;
png_fixed_point y_green;
png_fixed_point x_blue;
png_fixed_point y_blue;
#endif
#ifdef PNG_pCAL_SUPPORTED
/* The pCAL chunk describes a transformation between the stored pixel
* values and original physical data values used to create the image.
* The integer range [0, 2^bit_depth - 1] maps to the floating-point
* range given by [pcal_X0, pcal_X1], and are further transformed by a
* (possibly non-linear) transformation function given by "pcal_type"
* and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_
* defines below, and the PNG-Group's PNG extensions document for a
* complete description of the transformations and how they should be
* implemented, and for a description of the ASCII parameter strings.
* Data values are valid if (valid & PNG_INFO_pCAL) non-zero.
*/
png_charp pcal_purpose; /* pCAL chunk description string */
png_int_32 pcal_X0; /* minimum value */
png_int_32 pcal_X1; /* maximum value */
png_charp pcal_units; /* Latin-1 string giving physical units */
png_charpp pcal_params; /* ASCII strings containing parameter values */
png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */
png_byte pcal_nparams; /* number of parameters given in pcal_params */
#endif
/* New members added in libpng-1.0.6 */
png_uint_32 free_me; /* flags items libpng is responsible for freeing */
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
/* Storage for unknown chunks that the library doesn't recognize. */
png_unknown_chunkp unknown_chunks;
int unknown_chunks_num;
#endif
#ifdef PNG_iCCP_SUPPORTED
/* iCCP chunk data. */
png_charp iccp_name; /* profile name */
png_bytep iccp_profile; /* International Color Consortium profile data */
png_uint_32 iccp_proflen; /* ICC profile data length */
png_byte iccp_compression; /* Always zero */
#endif
#ifdef PNG_sPLT_SUPPORTED
/* Data on sPLT chunks (there may be more than one). */
png_sPLT_tp splt_palettes;
png_uint_32 splt_palettes_num;
#endif
#ifdef PNG_sCAL_SUPPORTED
/* The sCAL chunk describes the actual physical dimensions of the
* subject matter of the graphic. The chunk contains a unit specification
* a byte value, and two ASCII strings representing floating-point
* values. The values are width and height corresponsing to one pixel
* in the image. Data values are valid if (valid & PNG_INFO_sCAL) is
* non-zero.
*/
png_byte scal_unit; /* unit of physical scale */
png_charp scal_s_width; /* string containing height */
png_charp scal_s_height; /* string containing width */
#endif
#ifdef PNG_INFO_IMAGE_SUPPORTED
/* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS)
non-zero */
/* Data valid if (valid & PNG_INFO_IDAT) non-zero */
png_bytepp row_pointers; /* the image bits */
#endif
};
#endif /* PNGINFO_H */

16
reactos/dll/3rdparty/libpng/pngmem.c vendored
View file

@ -1,7 +1,7 @@
/* pngmem.c - stub functions for memory allocation
*
* Last changed in libpng 1.5.4 [July 7, 2011]
* Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -56,9 +56,9 @@ png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
if (malloc_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
memset(&dummy_struct, 0, sizeof dummy_struct);
dummy_struct.mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size);
}
else
@ -90,9 +90,9 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
if (free_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
(*(free_fn))(png_ptr, struct_ptr);
memset(&dummy_struct, 0, sizeof dummy_struct);
dummy_struct.mem_ptr=mem_ptr;
(*(free_fn))(&dummy_struct, struct_ptr);
return;
}
@ -143,7 +143,7 @@ png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
# ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr->malloc_fn != NULL)
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size));
else
ret = (png_malloc_default(png_ptr, size));

259
reactos/dll/3rdparty/libpng/pngpread.c vendored
View file

@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
* Last changed in libpng 1.5.2 [March 31, 2011]
* Last changed in libpng 1.5.9 [February 18, 2012]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -208,61 +208,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
void /* PRIVATE */
png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
{
PNG_IHDR;
PNG_IDAT;
PNG_IEND;
PNG_PLTE;
#ifdef PNG_READ_bKGD_SUPPORTED
PNG_bKGD;
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
PNG_cHRM;
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
PNG_gAMA;
#endif
#ifdef PNG_READ_hIST_SUPPORTED
PNG_hIST;
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
PNG_iCCP;
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
PNG_iTXt;
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
PNG_oFFs;
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
PNG_pCAL;
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
PNG_pHYs;
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
PNG_sBIT;
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
PNG_sCAL;
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
PNG_sRGB;
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
PNG_sPLT;
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
PNG_tEXt;
#endif
#ifdef PNG_READ_tIME_SUPPORTED
PNG_tIME;
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
PNG_tRNS;
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
PNG_zTXt;
#endif
png_uint_32 chunk_name;
/* First we make sure we have enough data for the 4 byte chunk name
* and the 4 byte chunk length before proceeding with decoding the
@ -273,6 +219,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
{
png_byte chunk_length[4];
png_byte chunk_tag[4];
if (png_ptr->buffer_size < 8)
{
@ -283,16 +230,27 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_fill_buffer(png_ptr, chunk_length, 4);
png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
png_reset_crc(png_ptr);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
png_crc_read(png_ptr, chunk_tag, 4);
png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
}
if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
chunk_name = png_ptr->chunk_name;
if (chunk_name == png_IDAT)
{
/* This is here above the if/else case statement below because if the
* unknown handling marks 'IDAT' as unknown then the IDAT handling case is
* completely skipped.
*
* TODO: there must be a better way of doing this.
*/
if (png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
}
if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
if (chunk_name == png_IHDR)
{
if (png_ptr->push_length != 13)
png_error(png_ptr, "Invalid IHDR length");
@ -306,7 +264,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length);
}
else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
else if (chunk_name == png_IEND)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -321,7 +279,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
}
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
else if (png_chunk_unknown_handling(png_ptr, chunk_name))
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -329,15 +287,15 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
return;
}
if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
if (chunk_name == png_IDAT)
png_ptr->mode |= PNG_HAVE_IDAT;
png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
if (chunk_name == png_PLTE)
png_ptr->mode |= PNG_HAVE_PLTE;
else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
else if (chunk_name == png_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
@ -349,7 +307,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
}
#endif
else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
else if (chunk_name == png_PLTE)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -359,7 +317,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
}
else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
else if (chunk_name == png_IDAT)
{
/* If we reach an IDAT chunk, this means we have read all of the
* header chunks, and we can start reading the image (or if this
@ -395,7 +353,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
}
#ifdef PNG_READ_gAMA_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
else if (png_ptr->chunk_name == png_gAMA)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -408,7 +366,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
else if (png_ptr->chunk_name == png_sBIT)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -421,7 +379,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
else if (png_ptr->chunk_name == png_cHRM)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -434,7 +392,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
else if (chunk_name == png_sRGB)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -447,7 +405,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
else if (png_ptr->chunk_name == png_iCCP)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -460,7 +418,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
else if (chunk_name == png_sPLT)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -473,7 +431,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
else if (chunk_name == png_tRNS)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -486,7 +444,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_bKGD_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
else if (chunk_name == png_bKGD)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -499,7 +457,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_hIST_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
else if (chunk_name == png_hIST)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -512,7 +470,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
else if (chunk_name == png_pHYs)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -525,7 +483,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
else if (chunk_name == png_oFFs)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -538,7 +496,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
else if (chunk_name == png_pCAL)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -551,7 +509,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
else if (chunk_name == png_sCAL)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -564,7 +522,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_tIME_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
else if (chunk_name == png_tIME)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -577,7 +535,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
else if (chunk_name == png_tEXt)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -590,7 +548,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
else if (chunk_name == png_zTXt)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -603,7 +561,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
else if (chunk_name == png_iTXt)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
@ -772,8 +730,7 @@ png_push_save_buffer(png_structp png_ptr)
new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
(png_size_t)new_max);
png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, new_max);
if (png_ptr->save_buffer == NULL)
{
@ -809,11 +766,12 @@ png_push_restore_buffer(png_structp png_ptr, png_bytep buffer,
void /* PRIVATE */
png_push_read_IDAT(png_structp png_ptr)
{
PNG_IDAT;
if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
{
png_byte chunk_length[4];
png_byte chunk_tag[4];
/* TODO: this code can be commoned up with the same code in push_read */
if (png_ptr->buffer_size < 8)
{
png_push_save_buffer(png_ptr);
@ -823,10 +781,11 @@ png_push_read_IDAT(png_structp png_ptr)
png_push_fill_buffer(png_ptr, chunk_length, 4);
png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
png_reset_crc(png_ptr);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
png_crc_read(png_ptr, chunk_tag, 4);
png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
if (png_ptr->chunk_name != png_IDAT)
{
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
@ -838,6 +797,7 @@ png_push_read_IDAT(png_structp png_ptr)
png_ptr->idat_size = png_ptr->push_length;
}
if (png_ptr->idat_size && png_ptr->save_buffer_size)
{
png_size_t save_size = png_ptr->save_buffer_size;
@ -1011,36 +971,56 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
void /* PRIVATE */
png_push_process_row(png_structp png_ptr)
{
png_ptr->row_info.color_type = png_ptr->color_type;
png_ptr->row_info.width = png_ptr->iwidth;
png_ptr->row_info.channels = png_ptr->channels;
png_ptr->row_info.bit_depth = png_ptr->bit_depth;
png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
/* 1.5.6: row_info moved out of png_struct to a local here. */
png_row_info row_info;
png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
png_ptr->row_info.width);
row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */
row_info.color_type = png_ptr->color_type;
row_info.bit_depth = png_ptr->bit_depth;
row_info.channels = png_ptr->channels;
row_info.pixel_depth = png_ptr->pixel_depth;
row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width);
png_read_filter_row(png_ptr, &(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->prev_row + 1,
(int)(png_ptr->row_buf[0]));
if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE)
{
if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST)
png_read_filter_row(png_ptr, &row_info, png_ptr->row_buf + 1,
png_ptr->prev_row + 1, png_ptr->row_buf[0]);
else
png_error(png_ptr, "bad adaptive filter value");
}
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
/* libpng 1.5.6: the following line was copying png_ptr->rowbytes before
* 1.5.6, while the buffer really is this big in current versions of libpng
* it may not be in the future, so this was changed just to copy the
* interlaced row count:
*/
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1);
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
if (png_ptr->transformations)
png_do_read_transformations(png_ptr);
png_do_read_transformations(png_ptr, &row_info);
#endif
/* The transformed pixel depth should match the depth now in row_info. */
if (png_ptr->transformed_pixel_depth == 0)
{
png_ptr->transformed_pixel_depth = row_info.pixel_depth;
if (row_info.pixel_depth > png_ptr->maximum_pixel_depth)
png_error(png_ptr, "progressive row overflow");
}
else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth)
png_error(png_ptr, "internal progressive row size calculation error");
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Blow up interlaced rows to full size */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
/* old interface (pre-1.0.9):
png_do_read_interlace(&(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
*/
png_do_read_interlace(png_ptr);
png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
png_ptr->transformations);
switch (png_ptr->pass)
{
@ -1220,24 +1200,26 @@ png_push_process_row(png_structp png_ptr)
void /* PRIVATE */
png_read_push_finish_row(png_structp png_ptr)
{
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
static PNG_CONST png_byte FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
static PNG_CONST png_byte FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
static PNG_CONST png_byte FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
static PNG_CONST png_byte FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
/* Height of interlace block. This is not currently used - if you need
* it, uncomment it here and in png.h
PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
static PNG_CONST png_byte FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
*/
#endif
png_ptr->row_number++;
if (png_ptr->row_number < png_ptr->num_rows)
@ -1304,8 +1286,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
}
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_size_t)(length + 1));
png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@ -1403,8 +1384,7 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
}
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_size_t)(length + 1));
png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@ -1605,8 +1585,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
}
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_size_t)(length + 1));
png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@ -1714,11 +1693,12 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
png_uint_32 skip = 0;
png_uint_32 chunk_name = png_ptr->chunk_name;
if (!(png_ptr->chunk_name[0] & 0x20))
if (PNG_CHUNK_CRITICAL(chunk_name))
{
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
&& png_ptr->read_user_chunk_fn == NULL
@ -1731,23 +1711,26 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
}
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
/* TODO: the code below is apparently just using the
* png_struct::unknown_chunk member as a temporarily variable, it should be
* possible to eliminate both it and the temporary buffer.
*/
if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
{
#ifdef PNG_MAX_MALLOC_64K
if (length > (png_uint_32)65535L)
if (length > 65535)
{
png_warning(png_ptr, "unknown chunk too large to fit in memory");
skip = length - (png_uint_32)65535L;
length = (png_uint_32)65535L;
skip = length - 65535;
length = 65535;
}
#endif
png_memcpy((png_charp)png_ptr->unknown_chunk.name,
(png_charp)png_ptr->chunk_name,
png_sizeof(png_ptr->unknown_chunk.name));
png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name) - 1]
= '\0';
/* This is just a record for the user; libpng doesn't use the character
* form of the name.
*/
PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name);
png_ptr->unknown_chunk.size = (png_size_t)length;
png_ptr->unknown_chunk.size = length;
if (length == 0)
png_ptr->unknown_chunk.data = NULL;
@ -1755,8 +1738,9 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
else
{
png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
(png_size_t)length);
png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
png_ptr->unknown_chunk.size);
png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data,
png_ptr->unknown_chunk.size);
}
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
@ -1772,8 +1756,8 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
if (ret == 0)
{
if (!(png_ptr->chunk_name[0] & 0x20))
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS)
png_chunk_error(png_ptr, "unknown critical chunk");
png_set_unknown_chunks(png_ptr, info_ptr,
@ -1816,19 +1800,22 @@ png_push_have_row(png_structp png_ptr, png_bytep row)
(int)png_ptr->pass);
}
#ifdef PNG_READ_INTERLACING_SUPPORTED
void PNGAPI
png_progressive_combine_row (png_structp png_ptr, png_bytep old_row,
png_const_bytep new_row)
{
PNG_CONST int FARDATA png_pass_dsp_mask[7] =
{0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
if (png_ptr == NULL)
return;
if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */
png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
/* new_row is a flag here - if it is NULL then the app callback was called
* from an empty row (see the calls to png_struct::row_fn below), otherwise
* it must be png_ptr->row_buf+1
*/
if (new_row != NULL)
png_combine_row(png_ptr, old_row, 1/*display*/);
}
#endif /* PNG_READ_INTERLACING_SUPPORTED */
void PNGAPI
png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,

1629
reactos/dll/3rdparty/libpng/pngpriv.h vendored Normal file
View file

File diff suppressed because it is too large Load diff

396
reactos/dll/3rdparty/libpng/pngread.c vendored
View file

@ -1,7 +1,7 @@
/* pngread.c - read a PNG file
*
* Last changed in libpng 1.5.4 [July 7, 2011]
* Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -80,8 +80,9 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
#ifdef PNG_SETJMP_SUPPORTED
/* Applications that neglect to set up their own setjmp() and then
encounter a png_error() will longjmp here. Since the jmpbuf is
then meaningless we abort instead of returning. */
* encounter a png_error() will longjmp here. Since the jmpbuf is
* then meaningless we abort instead of returning.
*/
#ifdef USE_FAR_KEYWORD
if (setjmp(tmp_jmpbuf))
#else
@ -190,89 +191,35 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
for (;;)
{
PNG_IHDR;
PNG_IDAT;
PNG_IEND;
PNG_PLTE;
#ifdef PNG_READ_bKGD_SUPPORTED
PNG_bKGD;
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
PNG_cHRM;
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
PNG_gAMA;
#endif
#ifdef PNG_READ_hIST_SUPPORTED
PNG_hIST;
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
PNG_iCCP;
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
PNG_iTXt;
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
PNG_oFFs;
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
PNG_pCAL;
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
PNG_pHYs;
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
PNG_sBIT;
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
PNG_sCAL;
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
PNG_sPLT;
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
PNG_sRGB;
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
PNG_tEXt;
#endif
#ifdef PNG_READ_tIME_SUPPORTED
PNG_tIME;
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
PNG_tRNS;
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
PNG_zTXt;
#endif
png_uint_32 length = png_read_chunk_header(png_ptr);
PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
png_uint_32 chunk_name = png_ptr->chunk_name;
/* This should be a binary subdivision search or a hash for
* matching the chunk name rather than a linear search.
*/
if (!png_memcmp(chunk_name, png_IDAT, 4))
if (chunk_name == png_IDAT)
if (png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
if (!png_memcmp(chunk_name, png_IHDR, 4))
if (chunk_name == png_IHDR)
png_handle_IHDR(png_ptr, info_ptr, length);
else if (!png_memcmp(chunk_name, png_IEND, 4))
else if (chunk_name == png_IEND)
png_handle_IEND(png_ptr, info_ptr, length);
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
else if (png_handle_as_unknown(png_ptr, chunk_name))
else if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
PNG_HANDLE_CHUNK_AS_DEFAULT)
{
if (!png_memcmp(chunk_name, png_IDAT, 4))
if (chunk_name == png_IDAT)
png_ptr->mode |= PNG_HAVE_IDAT;
png_handle_unknown(png_ptr, info_ptr, length);
if (!png_memcmp(chunk_name, png_PLTE, 4))
if (chunk_name == png_PLTE)
png_ptr->mode |= PNG_HAVE_PLTE;
else if (!png_memcmp(chunk_name, png_IDAT, 4))
else if (chunk_name == png_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
@ -285,10 +232,10 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
}
}
#endif
else if (!png_memcmp(chunk_name, png_PLTE, 4))
else if (chunk_name == png_PLTE)
png_handle_PLTE(png_ptr, info_ptr, length);
else if (!png_memcmp(chunk_name, png_IDAT, 4))
else if (chunk_name == png_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
@ -303,87 +250,87 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
}
#ifdef PNG_READ_bKGD_SUPPORTED
else if (!png_memcmp(chunk_name, png_bKGD, 4))
else if (chunk_name == png_bKGD)
png_handle_bKGD(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
else if (!png_memcmp(chunk_name, png_cHRM, 4))
else if (chunk_name == png_cHRM)
png_handle_cHRM(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
else if (!png_memcmp(chunk_name, png_gAMA, 4))
else if (chunk_name == png_gAMA)
png_handle_gAMA(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_hIST_SUPPORTED
else if (!png_memcmp(chunk_name, png_hIST, 4))
else if (chunk_name == png_hIST)
png_handle_hIST(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
else if (!png_memcmp(chunk_name, png_oFFs, 4))
else if (chunk_name == png_oFFs)
png_handle_oFFs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_pCAL, 4))
else if (chunk_name == png_pCAL)
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_sCAL, 4))
else if (chunk_name == png_sCAL)
png_handle_sCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
else if (!png_memcmp(chunk_name, png_pHYs, 4))
else if (chunk_name == png_pHYs)
png_handle_pHYs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sBIT, 4))
else if (chunk_name == png_sBIT)
png_handle_sBIT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
else if (!png_memcmp(chunk_name, png_sRGB, 4))
else if (chunk_name == png_sRGB)
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
else if (!png_memcmp(chunk_name, png_iCCP, 4))
else if (chunk_name == png_iCCP)
png_handle_iCCP(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sPLT, 4))
else if (chunk_name == png_sPLT)
png_handle_sPLT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_tEXt, 4))
else if (chunk_name == png_tEXt)
png_handle_tEXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tIME_SUPPORTED
else if (!png_memcmp(chunk_name, png_tIME, 4))
else if (chunk_name == png_tIME)
png_handle_tIME(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
else if (!png_memcmp(chunk_name, png_tRNS, 4))
else if (chunk_name == png_tRNS)
png_handle_tRNS(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_zTXt, 4))
else if (chunk_name == png_zTXt)
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_iTXt, 4))
else if (chunk_name == png_iTXt)
png_handle_iTXt(png_ptr, info_ptr, length);
#endif
@ -402,13 +349,7 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr)
if (png_ptr == NULL)
return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
else
png_warning(png_ptr,
"Ignoring extra png_read_update_info() call;"
" row buffer not reallocated");
png_read_start_row(png_ptr);
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
png_read_transform_info(png_ptr, info_ptr);
@ -428,15 +369,8 @@ png_start_read_image(png_structp png_ptr)
{
png_debug(1, "in png_start_read_image");
if (png_ptr == NULL)
return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
else
png_warning(png_ptr,
"Ignoring extra png_start_read_image() call;"
" row buffer not reallocated");
if (png_ptr != NULL)
png_read_start_row(png_ptr);
}
#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
@ -444,23 +378,30 @@ png_start_read_image(png_structp png_ptr)
void PNGAPI
png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
{
PNG_IDAT;
#ifdef PNG_READ_INTERLACING_SUPPORTED
PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
0xff};
PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
#endif
int ret;
png_row_info row_info;
if (png_ptr == NULL)
return;
png_debug2(1, "in png_read_row (row %lu, pass %d)",
(unsigned long)png_ptr->row_number, png_ptr->pass);
/* png_read_start_row sets the information (in particular iwidth) for this
* interlace pass.
*/
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
/* 1.5.6: row_info moved out of png_struct to a local here. */
row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */
row_info.color_type = png_ptr->color_type;
row_info.bit_depth = png_ptr->bit_depth;
row_info.channels = png_ptr->channels;
row_info.pixel_depth = png_ptr->pixel_depth;
row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width);
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
/* Check for transforms that have been set but were defined out */
@ -502,7 +443,12 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
}
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* If interlaced and we do not need a new row, combine row and return */
/* If interlaced and we do not need a new row, combine row and return.
* Notice that the pixels we have from previous rows have been transformed
* already; we can only combine like with like (transformed or
* untransformed) and, because of the libpng API for interlaced images, this
* means we must transform before de-interlacing.
*/
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
switch (png_ptr->pass)
@ -511,8 +457,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if (png_ptr->row_number & 0x07)
{
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row,
png_pass_dsp_mask[png_ptr->pass]);
png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
}
@ -522,8 +467,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
{
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row,
png_pass_dsp_mask[png_ptr->pass]);
png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@ -534,8 +478,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if ((png_ptr->row_number & 0x07) != 4)
{
if (dsp_row != NULL && (png_ptr->row_number & 4))
png_combine_row(png_ptr, dsp_row,
png_pass_dsp_mask[png_ptr->pass]);
png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@ -546,8 +489,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if ((png_ptr->row_number & 3) || png_ptr->width < 3)
{
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row,
png_pass_dsp_mask[png_ptr->pass]);
png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@ -558,8 +500,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if ((png_ptr->row_number & 3) != 2)
{
if (dsp_row != NULL && (png_ptr->row_number & 2))
png_combine_row(png_ptr, dsp_row,
png_pass_dsp_mask[png_ptr->pass]);
png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@ -569,8 +510,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if ((png_ptr->row_number & 1) || png_ptr->width < 2)
{
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row,
png_pass_dsp_mask[png_ptr->pass]);
png_combine_row(png_ptr, dsp_row, 1/*display*/);
png_read_finish_row(png_ptr);
return;
@ -606,7 +546,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
png_crc_finish(png_ptr, 0);
png_ptr->idat_size = png_read_chunk_header(png_ptr);
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
if (png_ptr->chunk_name != png_IDAT)
png_error(png_ptr, "Not enough image data");
}
png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
@ -636,63 +576,72 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
} while (png_ptr->zstream.avail_out);
png_ptr->row_info.color_type = png_ptr->color_type;
png_ptr->row_info.width = png_ptr->iwidth;
png_ptr->row_info.channels = png_ptr->channels;
png_ptr->row_info.bit_depth = png_ptr->bit_depth;
png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
png_ptr->row_info.width);
if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE)
{
if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST)
png_read_filter_row(png_ptr, &row_info, png_ptr->row_buf + 1,
png_ptr->prev_row + 1, png_ptr->row_buf[0]);
else
png_error(png_ptr, "bad adaptive filter value");
}
if (png_ptr->row_buf[0])
png_read_filter_row(png_ptr, &(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->prev_row + 1,
(int)(png_ptr->row_buf[0]));
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
/* libpng 1.5.6: the following line was copying png_ptr->rowbytes before
* 1.5.6, while the buffer really is this big in current versions of libpng
* it may not be in the future, so this was changed just to copy the
* interlaced count:
*/
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1);
#ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
(png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{
/* Intrapixel differencing */
png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_read_intrapixel(&row_info, png_ptr->row_buf + 1);
}
#endif
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
if (png_ptr->transformations)
png_do_read_transformations(png_ptr);
png_do_read_transformations(png_ptr, &row_info);
#endif
/* The transformed pixel depth should match the depth now in row_info. */
if (png_ptr->transformed_pixel_depth == 0)
{
png_ptr->transformed_pixel_depth = row_info.pixel_depth;
if (row_info.pixel_depth > png_ptr->maximum_pixel_depth)
png_error(png_ptr, "sequential row overflow");
}
else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth)
png_error(png_ptr, "internal sequential row size calculation error");
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Blow up interlaced rows to full size */
if (png_ptr->interlaced &&
(png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
/* Old interface (pre-1.0.9):
* png_do_read_interlace(&(png_ptr->row_info),
* png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
*/
png_do_read_interlace(png_ptr);
png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
png_ptr->transformations);
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row, png_pass_dsp_mask[png_ptr->pass]);
png_combine_row(png_ptr, dsp_row, 1/*display*/);
if (row != NULL)
png_combine_row(png_ptr, row, png_pass_mask[png_ptr->pass]);
png_combine_row(png_ptr, row, 0/*row*/);
}
else
#endif
{
if (row != NULL)
png_combine_row(png_ptr, row, 0xff);
png_combine_row(png_ptr, row, -1/*ignored*/);
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row, 0xff);
png_combine_row(png_ptr, dsp_row, -1/*ignored*/);
}
png_read_finish_row(png_ptr);
@ -858,85 +807,31 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
do
{
PNG_IHDR;
PNG_IDAT;
PNG_IEND;
PNG_PLTE;
#ifdef PNG_READ_bKGD_SUPPORTED
PNG_bKGD;
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
PNG_cHRM;
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
PNG_gAMA;
#endif
#ifdef PNG_READ_hIST_SUPPORTED
PNG_hIST;
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
PNG_iCCP;
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
PNG_iTXt;
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
PNG_oFFs;
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
PNG_pCAL;
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
PNG_pHYs;
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
PNG_sBIT;
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
PNG_sCAL;
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
PNG_sPLT;
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
PNG_sRGB;
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
PNG_tEXt;
#endif
#ifdef PNG_READ_tIME_SUPPORTED
PNG_tIME;
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
PNG_tRNS;
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
PNG_zTXt;
#endif
png_uint_32 length = png_read_chunk_header(png_ptr);
PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
png_uint_32 chunk_name = png_ptr->chunk_name;
if (!png_memcmp(chunk_name, png_IHDR, 4))
if (chunk_name == png_IHDR)
png_handle_IHDR(png_ptr, info_ptr, length);
else if (!png_memcmp(chunk_name, png_IEND, 4))
else if (chunk_name == png_IEND)
png_handle_IEND(png_ptr, info_ptr, length);
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
else if (png_handle_as_unknown(png_ptr, chunk_name))
else if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
PNG_HANDLE_CHUNK_AS_DEFAULT)
{
if (!png_memcmp(chunk_name, png_IDAT, 4))
if (chunk_name == png_IDAT)
{
if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
png_benign_error(png_ptr, "Too many IDATs found");
}
png_handle_unknown(png_ptr, info_ptr, length);
if (!png_memcmp(chunk_name, png_PLTE, 4))
if (chunk_name == png_PLTE)
png_ptr->mode |= PNG_HAVE_PLTE;
}
#endif
else if (!png_memcmp(chunk_name, png_IDAT, 4))
else if (chunk_name == png_IDAT)
{
/* Zero length IDATs are legal after the last IDAT has been
* read, but not after other chunks have been read.
@ -946,91 +841,91 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
png_crc_finish(png_ptr, length);
}
else if (!png_memcmp(chunk_name, png_PLTE, 4))
else if (chunk_name == png_PLTE)
png_handle_PLTE(png_ptr, info_ptr, length);
#ifdef PNG_READ_bKGD_SUPPORTED
else if (!png_memcmp(chunk_name, png_bKGD, 4))
else if (chunk_name == png_bKGD)
png_handle_bKGD(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
else if (!png_memcmp(chunk_name, png_cHRM, 4))
else if (chunk_name == png_cHRM)
png_handle_cHRM(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
else if (!png_memcmp(chunk_name, png_gAMA, 4))
else if (chunk_name == png_gAMA)
png_handle_gAMA(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_hIST_SUPPORTED
else if (!png_memcmp(chunk_name, png_hIST, 4))
else if (chunk_name == png_hIST)
png_handle_hIST(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
else if (!png_memcmp(chunk_name, png_oFFs, 4))
else if (chunk_name == png_oFFs)
png_handle_oFFs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_pCAL, 4))
else if (chunk_name == png_pCAL)
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_sCAL, 4))
else if (chunk_name == png_sCAL)
png_handle_sCAL(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
else if (!png_memcmp(chunk_name, png_pHYs, 4))
else if (chunk_name == png_pHYs)
png_handle_pHYs(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sBIT, 4))
else if (chunk_name == png_sBIT)
png_handle_sBIT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
else if (!png_memcmp(chunk_name, png_sRGB, 4))
else if (chunk_name == png_sRGB)
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
else if (!png_memcmp(chunk_name, png_iCCP, 4))
else if (chunk_name == png_iCCP)
png_handle_iCCP(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sPLT, 4))
else if (chunk_name == png_sPLT)
png_handle_sPLT(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_tEXt, 4))
else if (chunk_name == png_tEXt)
png_handle_tEXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tIME_SUPPORTED
else if (!png_memcmp(chunk_name, png_tIME, 4))
else if (chunk_name == png_tIME)
png_handle_tIME(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
else if (!png_memcmp(chunk_name, png_tRNS, 4))
else if (chunk_name == png_tRNS)
png_handle_tRNS(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_zTXt, 4))
else if (chunk_name == png_zTXt)
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_iTXt, 4))
else if (chunk_name == png_iTXt)
png_handle_iTXt(png_ptr, info_ptr, length);
#endif
@ -1138,9 +1033,13 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr,
if (end_info_ptr != NULL)
png_info_destroy(png_ptr, end_info_ptr);
#ifdef PNG_READ_GAMMA_SUPPORTED
png_destroy_gamma_table(png_ptr);
#endif
png_free(png_ptr, png_ptr->zbuf);
png_free(png_ptr, png_ptr->big_row_buf);
png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->big_prev_row);
png_free(png_ptr, png_ptr->chunkdata);
#ifdef PNG_READ_QUANTIZE_SUPPORTED
@ -1148,15 +1047,6 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr,
png_free(png_ptr, png_ptr->quantize_index);
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
png_free(png_ptr, png_ptr->gamma_table);
#endif
#ifdef PNG_READ_BACKGROUND_SUPPORTED
png_free(png_ptr, png_ptr->gamma_from_1);
png_free(png_ptr, png_ptr->gamma_to_1);
#endif
if (png_ptr->free_me & PNG_FREE_PLTE)
png_zfree(png_ptr, png_ptr->palette);
png_ptr->free_me &= ~PNG_FREE_PLTE;
@ -1174,42 +1064,6 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr,
png_ptr->free_me &= ~PNG_FREE_HIST;
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
if (png_ptr->gamma_16_table != NULL)
{
int i;
int istop = (1 << (8 - png_ptr->gamma_shift));
for (i = 0; i < istop; i++)
{
png_free(png_ptr, png_ptr->gamma_16_table[i]);
}
png_free(png_ptr, png_ptr->gamma_16_table);
}
#ifdef PNG_READ_BACKGROUND_SUPPORTED
if (png_ptr->gamma_16_from_1 != NULL)
{
int i;
int istop = (1 << (8 - png_ptr->gamma_shift));
for (i = 0; i < istop; i++)
{
png_free(png_ptr, png_ptr->gamma_16_from_1[i]);
}
png_free(png_ptr, png_ptr->gamma_16_from_1);
}
if (png_ptr->gamma_16_to_1 != NULL)
{
int i;
int istop = (1 << (8 - png_ptr->gamma_shift));
for (i = 0; i < istop; i++)
{
png_free(png_ptr, png_ptr->gamma_16_to_1[i]);
}
png_free(png_ptr, png_ptr->gamma_16_to_1);
}
#endif
#endif
inflateEnd(&png_ptr->zstream);
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED

420
reactos/dll/3rdparty/libpng/pngrtran.c vendored
View file

@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* Last changed in libpng 1.5.5 [September 22, 2011]
* Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -936,15 +936,15 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
switch(error_action)
{
case 1:
case PNG_ERROR_ACTION_NONE:
png_ptr->transformations |= PNG_RGB_TO_GRAY;
break;
case 2:
case PNG_ERROR_ACTION_WARN:
png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN;
break;
case 3:
case PNG_ERROR_ACTION_ERROR:
png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
break;
@ -1198,53 +1198,44 @@ png_init_rgb_transformations(png_structp png_ptr)
{
{
/* Expand background and tRNS chunks */
int gray = png_ptr->background.gray;
int trans_gray = png_ptr->trans_color.gray;
switch (png_ptr->bit_depth)
{
case 1:
png_ptr->background.gray *= (png_uint_16)0xff;
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_color.gray *= (png_uint_16)0xff;
png_ptr->trans_color.red = png_ptr->trans_color.green
= png_ptr->trans_color.blue = png_ptr->trans_color.gray;
}
gray *= 0xff;
trans_gray *= 0xff;
break;
case 2:
png_ptr->background.gray *= (png_uint_16)0x55;
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_color.gray *= (png_uint_16)0x55;
png_ptr->trans_color.red = png_ptr->trans_color.green
= png_ptr->trans_color.blue = png_ptr->trans_color.gray;
}
gray *= 0x55;
trans_gray *= 0x55;
break;
case 4:
png_ptr->background.gray *= (png_uint_16)0x11;
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_color.gray *= (png_uint_16)0x11;
png_ptr->trans_color.red = png_ptr->trans_color.green
= png_ptr->trans_color.blue = png_ptr->trans_color.gray;
}
gray *= 0x11;
trans_gray *= 0x11;
break;
default:
case 8:
/* Already 8 bits, fall through */
case 16:
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
/* Already a full 16 bits */
break;
}
png_ptr->background.red = png_ptr->background.green =
png_ptr->background.blue = (png_uint_16)gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_color.red = png_ptr->trans_color.green =
png_ptr->trans_color.blue = (png_uint_16)trans_gray;
}
}
} /* background expand and (therefore) no alpha association. */
#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */
@ -1474,6 +1465,28 @@ png_init_read_transformations(png_structp png_ptr)
}
#endif /* PNG_READ_BACKGROUND_SUPPORTED && PNG_READ_EXPAND_16_SUPPORTED */
#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \
(defined(PNG_READ_SCALE_16_TO_8_SUPPORTED) || \
defined(PNG_READ_STRIP_16_TO_8_SUPPORTED))
if ((png_ptr->transformations & (PNG_16_TO_8|PNG_SCALE_16_TO_8)) &&
(png_ptr->transformations & PNG_COMPOSE) &&
!(png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
png_ptr->bit_depth == 16)
{
/* On the other hand, if a 16-bit file is to be reduced to 8-bits per
* component this will also happen after PNG_COMPOSE and so the background
* color must be pre-expanded here.
*
* TODO: fix this too.
*/
png_ptr->background.red = (png_uint_16)(png_ptr->background.red * 257);
png_ptr->background.green =
(png_uint_16)(png_ptr->background.green * 257);
png_ptr->background.blue = (png_uint_16)(png_ptr->background.blue * 257);
png_ptr->background.gray = (png_uint_16)(png_ptr->background.gray * 257);
}
#endif
/* NOTE: below 'PNG_READ_ALPHA_MODE_SUPPORTED' is presumed to also enable the
* background support (see the comments in scripts/pnglibconf.dfa), this
* allows pre-multiplication of the alpha channel to be implemented as
@ -1521,6 +1534,16 @@ png_init_read_transformations(png_structp png_ptr)
#ifdef PNG_READ_BACKGROUND_SUPPORTED
if (png_ptr->transformations & PNG_COMPOSE)
{
/* Issue a warning about this combination: because RGB_TO_GRAY is
* optimized to do the gamma transform if present yet do_background has
* to do the same thing if both options are set a
* double-gamma-correction happens. This is true in all versions of
* libpng to date.
*/
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
png_warning(png_ptr,
"libpng does not support gamma+background+rgb_to_gray");
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
/* We don't get to here unless there is a tRNS chunk with non-opaque
@ -1650,8 +1673,9 @@ png_init_read_transformations(png_structp png_ptr)
/* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */
else /* color_type != PNG_COLOR_TYPE_PALETTE */
{
png_fixed_point g = PNG_FP_1;
png_fixed_point gs = PNG_FP_1;
int gs_sig, g_sig;
png_fixed_point g = PNG_FP_1; /* Correction to linear */
png_fixed_point gs = PNG_FP_1; /* Correction to screen */
switch (png_ptr->background_gamma_type)
{
@ -1675,34 +1699,45 @@ png_init_read_transformations(png_structp png_ptr)
png_error(png_ptr, "invalid background gamma type");
}
png_ptr->background_1.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, g);
g_sig = png_gamma_significant(g);
gs_sig = png_gamma_significant(gs);
png_ptr->background.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, gs);
if (g_sig)
png_ptr->background_1.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, g);
if (gs_sig)
png_ptr->background.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, gs);
if ((png_ptr->background.red != png_ptr->background.green) ||
(png_ptr->background.red != png_ptr->background.blue) ||
(png_ptr->background.red != png_ptr->background.gray))
{
/* RGB or RGBA with color background */
png_ptr->background_1.red = png_gamma_correct(png_ptr,
png_ptr->background.red, g);
if (g_sig)
{
png_ptr->background_1.red = png_gamma_correct(png_ptr,
png_ptr->background.red, g);
png_ptr->background_1.green = png_gamma_correct(png_ptr,
png_ptr->background.green, g);
png_ptr->background_1.green = png_gamma_correct(png_ptr,
png_ptr->background.green, g);
png_ptr->background_1.blue = png_gamma_correct(png_ptr,
png_ptr->background.blue, g);
png_ptr->background_1.blue = png_gamma_correct(png_ptr,
png_ptr->background.blue, g);
}
png_ptr->background.red = png_gamma_correct(png_ptr,
png_ptr->background.red, gs);
if (gs_sig)
{
png_ptr->background.red = png_gamma_correct(png_ptr,
png_ptr->background.red, gs);
png_ptr->background.green = png_gamma_correct(png_ptr,
png_ptr->background.green, gs);
png_ptr->background.green = png_gamma_correct(png_ptr,
png_ptr->background.green, gs);
png_ptr->background.blue = png_gamma_correct(png_ptr,
png_ptr->background.blue, gs);
png_ptr->background.blue = png_gamma_correct(png_ptr,
png_ptr->background.blue, gs);
}
}
else
@ -1714,13 +1749,22 @@ png_init_read_transformations(png_structp png_ptr)
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
}
/* The background is now in screen gamma: */
png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_SCREEN;
} /* color_type != PNG_COLOR_TYPE_PALETTE */
}/* png_ptr->transformations & PNG_BACKGROUND */
else
/* Transformation does not include PNG_BACKGROUND */
#endif /* PNG_READ_BACKGROUND_SUPPORTED */
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
/* RGB_TO_GRAY needs to have non-gamma-corrected values! */
&& ((png_ptr->transformations & PNG_EXPAND) == 0 ||
(png_ptr->transformations & PNG_RGB_TO_GRAY) == 0)
#endif
)
{
png_colorp palette = png_ptr->palette;
int num_palette = png_ptr->num_palette;
@ -1788,26 +1832,38 @@ png_init_read_transformations(png_structp png_ptr)
if ((png_ptr->transformations & PNG_SHIFT) &&
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
{
png_uint_16 i;
png_uint_16 istop = png_ptr->num_palette;
int sr = 8 - png_ptr->sig_bit.red;
int sg = 8 - png_ptr->sig_bit.green;
int sb = 8 - png_ptr->sig_bit.blue;
int i;
int istop = png_ptr->num_palette;
int shift = 8 - png_ptr->sig_bit.red;
if (sr < 0 || sr > 8)
sr = 0;
if (sg < 0 || sg > 8)
sg = 0;
if (sb < 0 || sb > 8)
sb = 0;
for (i = 0; i < istop; i++)
/* significant bits can be in the range 1 to 7 for a meaninful result, if
* the number of significant bits is 0 then no shift is done (this is an
* error condition which is silently ignored.)
*/
if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
{
png_ptr->palette[i].red >>= sr;
png_ptr->palette[i].green >>= sg;
png_ptr->palette[i].blue >>= sb;
int component = png_ptr->palette[i].red;
component >>= shift;
png_ptr->palette[i].red = (png_byte)component;
}
shift = 8 - png_ptr->sig_bit.green;
if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].green;
component >>= shift;
png_ptr->palette[i].green = (png_byte)component;
}
shift = 8 - png_ptr->sig_bit.blue;
if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].blue;
component >>= shift;
png_ptr->palette[i].blue = (png_byte)component;
}
}
#endif /* PNG_READ_SHIFT_SUPPORTED */
@ -1900,7 +1956,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->bit_depth = 8;
# else
# if PNG_READ_SCALE_16_TO_8_SUPPORTED
# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
png_ptr->transformations |= PNG_SCALE_16_TO_8;
info_ptr->bit_depth = 8;
# else
@ -1913,12 +1969,14 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
if (png_ptr->transformations & PNG_GRAY_TO_RGB)
info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
info_ptr->color_type = (png_byte)(info_ptr->color_type |
PNG_COLOR_MASK_COLOR);
#endif
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
info_ptr->color_type &= ~PNG_COLOR_MASK_COLOR;
info_ptr->color_type = (png_byte)(info_ptr->color_type &
~PNG_COLOR_MASK_COLOR);
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
@ -1958,7 +2016,8 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_STRIP_ALPHA)
{
info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
info_ptr->color_type = (png_byte)(info_ptr->color_type &
~PNG_COLOR_MASK_ALPHA);
info_ptr->num_trans = 0;
}
#endif
@ -2015,7 +2074,7 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
* decide how it fits in with the other transformations here.
*/
void /* PRIVATE */
png_do_read_transformations(png_structp png_ptr)
png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
{
png_debug(1, "in png_do_read_transformations");
@ -2046,9 +2105,9 @@ png_do_read_transformations(png_structp png_ptr)
#ifdef PNG_READ_EXPAND_SUPPORTED
if (png_ptr->transformations & PNG_EXPAND)
{
if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE)
if (row_info->color_type == PNG_COLOR_TYPE_PALETTE)
{
png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_expand_palette(row_info, png_ptr->row_buf + 1,
png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
}
@ -2056,11 +2115,11 @@ png_do_read_transformations(png_structp png_ptr)
{
if (png_ptr->num_trans &&
(png_ptr->transformations & PNG_EXPAND_tRNS))
png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_expand(row_info, png_ptr->row_buf + 1,
&(png_ptr->trans_color));
else
png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_expand(row_info, png_ptr->row_buf + 1,
NULL);
}
}
@ -2069,9 +2128,9 @@ png_do_read_transformations(png_structp png_ptr)
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
if ((png_ptr->transformations & PNG_STRIP_ALPHA) &&
!(png_ptr->transformations & PNG_COMPOSE) &&
(png_ptr->row_info.color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
png_ptr->row_info.color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
(row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
png_do_strip_channel(row_info, png_ptr->row_buf + 1,
0 /* at_start == false, because SWAP_ALPHA happens later */);
#endif
@ -2079,7 +2138,7 @@ png_do_read_transformations(png_structp png_ptr)
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
{
int rgb_error =
png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info),
png_do_rgb_to_gray(png_ptr, row_info,
png_ptr->row_buf + 1);
if (rgb_error)
@ -2133,45 +2192,55 @@ png_do_read_transformations(png_structp png_ptr)
*/
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
!(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
#endif
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED)
if (png_ptr->transformations & PNG_COMPOSE)
png_do_compose(&(png_ptr->row_info), png_ptr->row_buf + 1, png_ptr);
png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr);
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
if ((png_ptr->transformations & PNG_GAMMA) &&
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
/* Because RGB_TO_GRAY does the gamma transform. */
!(png_ptr->transformations & PNG_RGB_TO_GRAY) &&
#endif
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED)
/* Because PNG_COMPOSE does the gamma transform if there is something to
* do (if there is an alpha channel or transparency.)
*/
!((png_ptr->transformations & PNG_COMPOSE) &&
((png_ptr->num_trans != 0) ||
(png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) &&
#endif
/* Because png_init_read_transformations transforms the palette, unless
* RGB_TO_GRAY will do the transform.
*/
(png_ptr->color_type != PNG_COLOR_TYPE_PALETTE))
png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1, png_ptr);
png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr);
#endif
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
if ((png_ptr->transformations & PNG_STRIP_ALPHA) &&
(png_ptr->transformations & PNG_COMPOSE) &&
(png_ptr->row_info.color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
png_ptr->row_info.color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
(row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
png_do_strip_channel(row_info, png_ptr->row_buf + 1,
0 /* at_start == false, because SWAP_ALPHA happens later */);
#endif
#ifdef PNG_READ_ALPHA_MODE_SUPPORTED
if ((png_ptr->transformations & PNG_ENCODE_ALPHA) &&
(png_ptr->row_info.color_type & PNG_COLOR_MASK_ALPHA))
png_do_encode_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1, png_ptr);
(row_info->color_type & PNG_COLOR_MASK_ALPHA))
png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr);
#endif
#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
if (png_ptr->transformations & PNG_SCALE_16_TO_8)
png_do_scale_16_to_8(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
@ -2180,16 +2249,16 @@ png_do_read_transformations(png_structp png_ptr)
* calling the API or in a TRANSFORM flag) this is what happens.
*/
if (png_ptr->transformations & PNG_16_TO_8)
png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_chop(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
if (png_ptr->transformations & PNG_QUANTIZE)
{
png_do_quantize(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_quantize(row_info, png_ptr->row_buf + 1,
png_ptr->palette_lookup, png_ptr->quantize_index);
if (png_ptr->row_info.rowbytes == 0)
if (row_info->rowbytes == 0)
png_error(png_ptr, "png_do_quantize returned rowbytes=0");
}
#endif /* PNG_READ_QUANTIZE_SUPPORTED */
@ -2201,62 +2270,62 @@ png_do_read_transformations(png_structp png_ptr)
* better accuracy results faster!)
*/
if (png_ptr->transformations & PNG_EXPAND_16)
png_do_expand_16(&png_ptr->row_info, png_ptr->row_buf + 1);
png_do_expand_16(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
/*NOTE: moved here in 1.5.4 (from much later in this list.) */
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_INVERT_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_MONO)
png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_invert(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_SHIFT_SUPPORTED
if (png_ptr->transformations & PNG_SHIFT)
png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_unshift(row_info, png_ptr->row_buf + 1,
&(png_ptr->shift));
#endif
#ifdef PNG_READ_PACK_SUPPORTED
if (png_ptr->transformations & PNG_PACK)
png_do_unpack(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_unpack(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_BGR_SUPPORTED
if (png_ptr->transformations & PNG_BGR)
png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_bgr(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_packswap(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER)
png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_read_filler(row_info, png_ptr->row_buf + 1,
(png_uint_32)png_ptr->filler, png_ptr->flags);
#endif
#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_ALPHA)
png_do_read_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_ALPHA)
png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_16BIT_SUPPORTED
#ifdef PNG_READ_SWAP_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_swap(row_info, png_ptr->row_buf + 1);
#endif
#endif
@ -2265,8 +2334,8 @@ png_do_read_transformations(png_structp png_ptr)
{
if (png_ptr->read_user_transform_fn != NULL)
(*(png_ptr->read_user_transform_fn)) /* User read transform function */
(png_ptr, /* png_ptr */
&(png_ptr->row_info), /* row_info: */
(png_ptr, /* png_ptr */
row_info, /* row_info: */
/* png_uint_32 width; width of row */
/* png_size_t rowbytes; number of bytes in row */
/* png_byte color_type; color type of pixels */
@ -2276,16 +2345,15 @@ png_do_read_transformations(png_structp png_ptr)
png_ptr->row_buf + 1); /* start of pixel data for row */
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
if (png_ptr->user_transform_depth)
png_ptr->row_info.bit_depth = png_ptr->user_transform_depth;
row_info->bit_depth = png_ptr->user_transform_depth;
if (png_ptr->user_transform_channels)
png_ptr->row_info.channels = png_ptr->user_transform_channels;
row_info->channels = png_ptr->user_transform_channels;
#endif
png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
png_ptr->row_info.channels);
row_info->pixel_depth = (png_byte)(row_info->bit_depth *
row_info->channels);
png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
png_ptr->row_info.width);
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width);
}
#endif
}
@ -2399,105 +2467,128 @@ void /* PRIVATE */
png_do_unshift(png_row_infop row_info, png_bytep row,
png_const_color_8p sig_bits)
{
int color_type;
png_debug(1, "in png_do_unshift");
if (
row_info->color_type != PNG_COLOR_TYPE_PALETTE)
/* The palette case has already been handled in the _init routine. */
color_type = row_info->color_type;
if (color_type != PNG_COLOR_TYPE_PALETTE)
{
int shift[4];
int channels = 0;
int c;
png_uint_16 value = 0;
png_uint_32 row_width = row_info->width;
int bit_depth = row_info->bit_depth;
if (row_info->color_type & PNG_COLOR_MASK_COLOR)
if (color_type & PNG_COLOR_MASK_COLOR)
{
shift[channels++] = row_info->bit_depth - sig_bits->red;
shift[channels++] = row_info->bit_depth - sig_bits->green;
shift[channels++] = row_info->bit_depth - sig_bits->blue;
shift[channels++] = bit_depth - sig_bits->red;
shift[channels++] = bit_depth - sig_bits->green;
shift[channels++] = bit_depth - sig_bits->blue;
}
else
{
shift[channels++] = row_info->bit_depth - sig_bits->gray;
shift[channels++] = bit_depth - sig_bits->gray;
}
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
if (color_type & PNG_COLOR_MASK_ALPHA)
{
shift[channels++] = row_info->bit_depth - sig_bits->alpha;
shift[channels++] = bit_depth - sig_bits->alpha;
}
for (c = 0; c < channels; c++)
{
if (shift[c] <= 0)
shift[c] = 0;
int c, have_shift;
else
value = 1;
for (c = have_shift = 0; c < channels; ++c)
{
/* A shift of more than the bit depth is an error condition but it
* gets ignored here.
*/
if (shift[c] <= 0 || shift[c] >= bit_depth)
shift[c] = 0;
else
have_shift = 1;
}
if (!have_shift)
return;
}
if (!value)
return;
switch (row_info->bit_depth)
switch (bit_depth)
{
default:
/* Must be 1bpp gray: should not be here! */
/* NOTREACHED */
break;
case 2:
/* Must be 2bpp gray */
/* assert(channels == 1 && shift[0] == 1) */
{
png_bytep bp;
png_size_t i;
png_size_t istop = row_info->rowbytes;
png_bytep bp = row;
png_bytep bp_end = bp + row_info->rowbytes;
for (bp = row, i = 0; i < istop; i++)
while (bp < bp_end)
{
*bp >>= 1;
*bp++ &= 0x55;
int b = (*bp >> 1) & 0x55;
*bp++ = (png_byte)b;
}
break;
}
case 4:
/* Must be 4bpp gray */
/* assert(channels == 1) */
{
png_bytep bp = row;
png_size_t i;
png_size_t istop = row_info->rowbytes;
png_byte mask = (png_byte)((((int)0xf0 >> shift[0]) & (int)0xf0) |
(png_byte)((int)0xf >> shift[0]));
png_bytep bp_end = bp + row_info->rowbytes;
int gray_shift = shift[0];
int mask = 0xf >> gray_shift;
for (i = 0; i < istop; i++)
mask |= mask << 4;
while (bp < bp_end)
{
*bp >>= shift[0];
*bp++ &= mask;
int b = (*bp >> gray_shift) & mask;
*bp++ = (png_byte)b;
}
break;
}
case 8:
/* Single byte components, G, GA, RGB, RGBA */
{
png_bytep bp = row;
png_uint_32 i;
png_uint_32 istop = row_width * channels;
png_bytep bp_end = bp + row_info->rowbytes;
int channel = 0;
for (i = 0; i < istop; i++)
while (bp < bp_end)
{
*bp++ >>= shift[i%channels];
int b = *bp >> shift[channel];
if (++channel >= channels)
channel = 0;
*bp++ = (png_byte)b;
}
break;
}
#ifdef PNG_READ_16BIT_SUPPORTED
case 16:
/* Double byte components, G, GA, RGB, RGBA */
{
png_bytep bp = row;
png_uint_32 i;
png_uint_32 istop = channels * row_width;
png_bytep bp_end = bp + row_info->rowbytes;
int channel = 0;
for (i = 0; i < istop; i++)
while (bp < bp_end)
{
value = (png_uint_16)((*bp << 8) + *(bp + 1));
value >>= shift[i%channels];
int value = (bp[0] << 8) + bp[1];
value >>= shift[channel];
if (++channel >= channels)
channel = 0;
*bp++ = (png_byte)(value >> 8);
*bp++ = (png_byte)(value & 0xff);
}
@ -2519,7 +2610,7 @@ png_do_scale_16_to_8(png_row_infop row_info, png_bytep row)
if (row_info->bit_depth == 16)
{
png_bytep sp = row; /* source */
png_bytep dp = row; /* destinaton */
png_bytep dp = row; /* destination */
png_bytep ep = sp + row_info->rowbytes; /* end+1 */
while (sp < ep)
@ -2580,7 +2671,7 @@ png_do_chop(png_row_infop row_info, png_bytep row)
if (row_info->bit_depth == 16)
{
png_bytep sp = row; /* source */
png_bytep dp = row; /* destinaton */
png_bytep dp = row; /* destination */
png_bytep ep = sp + row_info->rowbytes; /* end+1 */
while (sp < ep)
@ -3060,7 +3151,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
}
}
}
row_info->channels += (png_byte)2;
row_info->channels = (png_byte)(row_info->channels + 2);
row_info->color_type |= PNG_COLOR_MASK_COLOR;
row_info->pixel_depth = (png_byte)(row_info->channels *
row_info->bit_depth);
@ -3288,7 +3379,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
if (red != green || red != blue)
rgb_error |= 1;
/* From 1.5.5 in the 16 bit case do the accurate convertion even
/* From 1.5.5 in the 16 bit case do the accurate conversion even
* in the 'fast' case - this is because this is where the code
* ends up when handling linear 16 bit data.
*/
@ -3306,7 +3397,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
}
}
row_info->channels -= 2;
row_info->channels = (png_byte)(row_info->channels - 2);
row_info->color_type = (png_byte)(row_info->color_type &
~PNG_COLOR_MASK_COLOR);
row_info->pixel_depth = (png_byte)(row_info->channels *
@ -3376,7 +3467,8 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette)
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
#ifdef PNG_READ_BACKGROUND_SUPPORTED
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED)
/* Replace any alpha or transparency with the supplied background color.
* "background" is already in the screen gamma, while "background_1" is
* at a gamma of 1.0. Paletted files have already been taken care of.
@ -4084,7 +4176,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
}
}
}
#endif
#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_READ_ALPHA_MODE_SUPPORTED */
#ifdef PNG_READ_GAMMA_SUPPORTED
/* Gamma correct the image, avoiding the alpha channel. Make sure

1236
reactos/dll/3rdparty/libpng/pngrutil.c vendored
View file

File diff suppressed because it is too large Load diff

16
reactos/dll/3rdparty/libpng/pngset.c vendored
View file

@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.5.5 [September 22, 2011]
* Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -681,9 +681,8 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
{
int i;
png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
png_ptr->chunk_name[0] == '\0') ?
"text" : (png_const_charp)png_ptr->chunk_name));
png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :
(unsigned long)png_ptr->chunk_name);
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
return(0);
@ -865,6 +864,15 @@ png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
(png_ptr->mode & PNG_WROTE_tIME))
return;
if (mod_time->month == 0 || mod_time->month > 12 ||
mod_time->day == 0 || mod_time->day > 31 ||
mod_time->hour > 23 || mod_time->minute > 59 ||
mod_time->second > 60)
{
png_warning(png_ptr, "Ignoring invalid time value");
return;
}
png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
info_ptr->valid |= PNG_INFO_tIME;
}

358
reactos/dll/3rdparty/libpng/pngstruct.h vendored Normal file
View file

@ -0,0 +1,358 @@
/* pngstruct.h - header file for PNG reference library
*
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* Last changed in libpng 1.5.9 [February 18, 2012]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*/
/* The structure that holds the information to read and write PNG files.
* The only people who need to care about what is inside of this are the
* people who will be modifying the library for their own special needs.
* It should NOT be accessed directly by an application.
*/
#ifndef PNGSTRUCT_H
#define PNGSTRUCT_H
/* zlib.h defines the structure z_stream, an instance of which is included
* in this structure and is required for decompressing the LZ compressed
* data in PNG files.
*/
#include "zlib.h"
struct png_struct_def
{
#ifdef PNG_SETJMP_SUPPORTED
jmp_buf longjmp_buffer; /* used in png_error */
png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */
#endif
png_error_ptr error_fn; /* function for printing errors and aborting */
#ifdef PNG_WARNINGS_SUPPORTED
png_error_ptr warning_fn; /* function for printing warnings */
#endif
png_voidp error_ptr; /* user supplied struct for error functions */
png_rw_ptr write_data_fn; /* function for writing output data */
png_rw_ptr read_data_fn; /* function for reading input data */
png_voidp io_ptr; /* ptr to application struct for I/O functions */
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
png_user_transform_ptr read_user_transform_fn; /* user read transform */
#endif
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
png_user_transform_ptr write_user_transform_fn; /* user write transform */
#endif
/* These were added in libpng-1.0.2 */
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
png_voidp user_transform_ptr; /* user supplied struct for user transform */
png_byte user_transform_depth; /* bit depth of user transformed pixels */
png_byte user_transform_channels; /* channels in user transformed pixels */
#endif
#endif
png_uint_32 mode; /* tells us where we are in the PNG file */
png_uint_32 flags; /* flags indicating various things to libpng */
png_uint_32 transformations; /* which transformations to perform */
z_stream zstream; /* pointer to decompression structure (below) */
png_bytep zbuf; /* buffer for zlib */
uInt zbuf_size; /* size of zbuf (typically 65536) */
#ifdef PNG_WRITE_SUPPORTED
/* Added in 1.5.4: state to keep track of whether the zstream has been
* initialized and if so whether it is for IDAT or some other chunk.
*/
#define PNG_ZLIB_UNINITIALIZED 0
#define PNG_ZLIB_FOR_IDAT 1
#define PNG_ZLIB_FOR_TEXT 2 /* anything other than IDAT */
#define PNG_ZLIB_USE_MASK 3 /* bottom two bits */
#define PNG_ZLIB_IN_USE 4 /* a flag value */
png_uint_32 zlib_state; /* State of zlib initialization */
/* End of material added at libpng 1.5.4 */
int zlib_level; /* holds zlib compression level */
int zlib_method; /* holds zlib compression method */
int zlib_window_bits; /* holds zlib compression window bits */
int zlib_mem_level; /* holds zlib compression memory level */
int zlib_strategy; /* holds zlib compression strategy */
#endif
/* Added at libpng 1.5.4 */
#if defined(PNG_WRITE_COMPRESSED_TEXT_SUPPORTED) || \
defined(PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED)
int zlib_text_level; /* holds zlib compression level */
int zlib_text_method; /* holds zlib compression method */
int zlib_text_window_bits; /* holds zlib compression window bits */
int zlib_text_mem_level; /* holds zlib compression memory level */
int zlib_text_strategy; /* holds zlib compression strategy */
#endif
/* End of material added at libpng 1.5.4 */
png_uint_32 width; /* width of image in pixels */
png_uint_32 height; /* height of image in pixels */
png_uint_32 num_rows; /* number of rows in current pass */
png_uint_32 usr_width; /* width of row at start of write */
png_size_t rowbytes; /* size of row in bytes */
png_uint_32 iwidth; /* width of current interlaced row in pixels */
png_uint_32 row_number; /* current row in interlace pass */
png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */
png_bytep prev_row; /* buffer to save previous (unfiltered) row.
* This is a pointer into big_prev_row
*/
png_bytep row_buf; /* buffer to save current (unfiltered) row.
* This is a pointer into big_row_buf
*/
png_bytep sub_row; /* buffer to save "sub" row when filtering */
png_bytep up_row; /* buffer to save "up" row when filtering */
png_bytep avg_row; /* buffer to save "avg" row when filtering */
png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */
png_uint_32 idat_size; /* current IDAT size for read */
png_uint_32 crc; /* current chunk CRC value */
png_colorp palette; /* palette from the input file */
png_uint_16 num_palette; /* number of color entries in palette */
png_uint_16 num_trans; /* number of transparency values */
png_byte compression; /* file compression type (always 0) */
png_byte filter; /* file filter type (always 0) */
png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
png_byte pass; /* current interlace pass (0 - 6) */
png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */
png_byte color_type; /* color type of file */
png_byte bit_depth; /* bit depth of file */
png_byte usr_bit_depth; /* bit depth of users row: write only */
png_byte pixel_depth; /* number of bits per pixel */
png_byte channels; /* number of channels in file */
png_byte usr_channels; /* channels at start of write: write only */
png_byte sig_bytes; /* magic bytes read/written from start of file */
png_byte maximum_pixel_depth;
/* pixel depth used for the row buffers */
png_byte transformed_pixel_depth;
/* pixel depth after read/write transforms */
png_byte io_chunk_string[5];
/* string name of chunk */
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
png_uint_16 filler; /* filler bytes for pixel expansion */
#endif
#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
defined(PNG_READ_ALPHA_MODE_SUPPORTED)
png_byte background_gamma_type;
png_fixed_point background_gamma;
png_color_16 background; /* background color in screen gamma space */
#ifdef PNG_READ_GAMMA_SUPPORTED
png_color_16 background_1; /* background normalized to gamma 1.0 */
#endif
#endif /* PNG_bKGD_SUPPORTED */
#ifdef PNG_WRITE_FLUSH_SUPPORTED
png_flush_ptr output_flush_fn; /* Function for flushing output */
png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
png_uint_32 flush_rows; /* number of rows written since last flush */
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */
png_fixed_point gamma; /* file gamma value */
png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */
png_bytep gamma_table; /* gamma table for 8-bit depth files */
png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
png_bytep gamma_from_1; /* converts from 1.0 to screen */
png_bytep gamma_to_1; /* converts from file to 1.0 */
png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
png_color_8 sig_bit; /* significant bits in each available channel */
#endif
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
png_color_8 shift; /* shift for significant bit tranformation */
#endif
#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
|| defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
png_bytep trans_alpha; /* alpha values for paletted files */
png_color_16 trans_color; /* transparent color for non-paletted files */
#endif
png_read_status_ptr read_row_fn; /* called after each row is decoded */
png_write_status_ptr write_row_fn; /* called after each row is encoded */
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
png_progressive_info_ptr info_fn; /* called after header data fully read */
png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */
png_progressive_end_ptr end_fn; /* called after image is complete */
png_bytep save_buffer_ptr; /* current location in save_buffer */
png_bytep save_buffer; /* buffer for previously read data */
png_bytep current_buffer_ptr; /* current location in current_buffer */
png_bytep current_buffer; /* buffer for recently used data */
png_uint_32 push_length; /* size of current input chunk */
png_uint_32 skip_length; /* bytes to skip in input data */
png_size_t save_buffer_size; /* amount of data now in save_buffer */
png_size_t save_buffer_max; /* total size of save_buffer */
png_size_t buffer_size; /* total amount of available input data */
png_size_t current_buffer_size; /* amount of data now in current_buffer */
int process_mode; /* what push library is currently doing */
int cur_palette; /* current push library palette index */
# ifdef PNG_TEXT_SUPPORTED
png_size_t current_text_size; /* current size of text input data */
png_size_t current_text_left; /* how much text left to read in input */
png_charp current_text; /* current text chunk buffer */
png_charp current_text_ptr; /* current location in current_text */
# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
/* For the Borland special 64K segment handler */
png_bytepp offset_table_ptr;
png_bytep offset_table;
png_uint_16 offset_table_number;
png_uint_16 offset_table_count;
png_uint_16 offset_table_count_free;
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
png_bytep palette_lookup; /* lookup table for quantizing */
png_bytep quantize_index; /* index translation for palette files */
#endif
#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED)
png_uint_16p hist; /* histogram */
#endif
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
png_byte heuristic_method; /* heuristic for row filter selection */
png_byte num_prev_filters; /* number of weights for previous rows */
png_bytep prev_filters; /* filter type(s) of previous row(s) */
png_uint_16p filter_weights; /* weight(s) for previous line(s) */
png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
png_uint_16p filter_costs; /* relative filter calculation cost */
png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
#endif
#ifdef PNG_TIME_RFC1123_SUPPORTED
char time_buffer[29]; /* String to hold RFC 1123 time text */
#endif
/* New members added in libpng-1.0.6 */
png_uint_32 free_me; /* flags items libpng is responsible for freeing */
#ifdef PNG_USER_CHUNKS_SUPPORTED
png_voidp user_chunk_ptr;
png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
#endif
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int num_chunk_list;
png_bytep chunk_list;
#endif
#ifdef PNG_READ_sRGB_SUPPORTED
/* Added in 1.5.5 to record an sRGB chunk in the png. */
png_byte is_sRGB;
#endif
/* New members added in libpng-1.0.3 */
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
png_byte rgb_to_gray_status;
/* Added in libpng 1.5.5 to record setting of coefficients: */
png_byte rgb_to_gray_coefficients_set;
/* These were changed from png_byte in libpng-1.0.6 */
png_uint_16 rgb_to_gray_red_coeff;
png_uint_16 rgb_to_gray_green_coeff;
/* deleted in 1.5.5: rgb_to_gray_blue_coeff; */
#endif
/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
#if defined(PNG_MNG_FEATURES_SUPPORTED)
/* Changed from png_byte to png_uint_32 at version 1.2.0 */
png_uint_32 mng_features_permitted;
#endif
/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
#ifdef PNG_MNG_FEATURES_SUPPORTED
png_byte filter_type;
#endif
/* New members added in libpng-1.2.0 */
/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
#ifdef PNG_USER_MEM_SUPPORTED
png_voidp mem_ptr; /* user supplied struct for mem functions */
png_malloc_ptr malloc_fn; /* function for allocating memory */
png_free_ptr free_fn; /* function for freeing memory */
#endif
/* New member added in libpng-1.0.13 and 1.2.0 */
png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
#ifdef PNG_READ_QUANTIZE_SUPPORTED
/* The following three members were added at version 1.0.14 and 1.2.4 */
png_bytep quantize_sort; /* working sort array */
png_bytep index_to_palette; /* where the original index currently is
in the palette */
png_bytep palette_to_index; /* which original index points to this
palette color */
#endif
/* New members added in libpng-1.0.16 and 1.2.6 */
png_byte compression_type;
#ifdef PNG_USER_LIMITS_SUPPORTED
png_uint_32 user_width_max;
png_uint_32 user_height_max;
/* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
* chunks that can be stored (0 means unlimited).
*/
png_uint_32 user_chunk_cache_max;
/* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
* can occupy when decompressed. 0 means unlimited.
*/
png_alloc_size_t user_chunk_malloc_max;
#endif
/* New member added in libpng-1.0.25 and 1.2.17 */
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
/* Storage for unknown chunk that the library doesn't recognize. */
png_unknown_chunk unknown_chunk;
#endif
/* New member added in libpng-1.2.26 */
png_size_t old_big_row_buf_size;
/* New member added in libpng-1.2.30 */
png_charp chunkdata; /* buffer for reading chunk data */
#ifdef PNG_IO_STATE_SUPPORTED
/* New member added in libpng-1.4.0 */
png_uint_32 io_state;
#endif
/* New member added in libpng-1.5.6 */
png_bytep big_prev_row;
void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
png_bytep row, png_const_bytep prev_row);
};
#endif /* PNGSTRUCT_H */

31
reactos/dll/3rdparty/libpng/pngtest.c vendored
View file

@ -1,7 +1,7 @@
/* pngtest.c - a simple test program to test libpng
*
* Last changed in libpng 1.5.4 [July 7, 2011]
* Last changed in libpng 1.5.6 [November 3, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -98,6 +98,7 @@ static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
#endif
static int verbose = 0;
static int strict = 0;
int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
@ -1162,6 +1163,10 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
{
pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
if (verbose)
printf("\n Text compression=%d\n", text_ptr->compression);
png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
}
}
@ -1479,7 +1484,12 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
FCLOSE(fpin);
FCLOSE(fpout);
return (0);
if (strict != 0)
return (1);
else
return (0);
}
if (!num_in)
@ -1504,7 +1514,12 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
FCLOSE(fpin);
FCLOSE(fpout);
return (0);
if (strict != 0)
return (1);
else
return (0);
}
}
@ -1586,6 +1601,14 @@ main(int argc, char *argv[])
inname = argv[2];
}
else if (strcmp(argv[1], "--strict") == 0)
{
status_dots_requested = 0;
verbose = 1;
inname = argv[2];
strict++;
}
else
{
inname = argv[1];
@ -1794,4 +1817,4 @@ main(int argc, char *argv[])
}
/* Generate a compiler error if there is an old png.h in the search path. */
typedef png_libpng_version_1_5_5 Your_png_h_is_not_version_1_5_5;
typedef png_libpng_version_1_5_9 Your_png_h_is_not_version_1_5_9;

64
reactos/dll/3rdparty/libpng/pngwrite.c vendored
View file

@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file
*
* Last changed in libpng 1.5.4 [July 7, 2011]
* Last changed in libpng 1.5.7 [December 15, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -490,8 +490,9 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
#ifdef PNG_SETJMP_SUPPORTED
/* Applications that neglect to set up their own setjmp() and then
encounter a png_error() will longjmp here. Since the jmpbuf is
then meaningless we abort instead of returning. */
* encounter a png_error() will longjmp here. Since the jmpbuf is
* then meaningless we abort instead of returning.
*/
#ifdef USE_FAR_KEYWORD
if (setjmp(tmp_jmpbuf))
#else
@ -608,6 +609,9 @@ png_write_image(png_structp png_ptr, png_bytepp image)
void PNGAPI
png_write_row(png_structp png_ptr, png_const_bytep row)
{
/* 1.5.6: moved from png_struct to be a local structure: */
png_row_info row_info;
if (png_ptr == NULL)
return;
@ -731,36 +735,31 @@ png_write_row(png_structp png_ptr, png_const_bytep row)
#endif
/* Set up row info for transformations */
png_ptr->row_info.color_type = png_ptr->color_type;
png_ptr->row_info.width = png_ptr->usr_width;
png_ptr->row_info.channels = png_ptr->usr_channels;
png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth;
png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
png_ptr->row_info.channels);
row_info.color_type = png_ptr->color_type;
row_info.width = png_ptr->usr_width;
row_info.channels = png_ptr->usr_channels;
row_info.bit_depth = png_ptr->usr_bit_depth;
row_info.pixel_depth = (png_byte)(row_info.bit_depth * row_info.channels);
row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width);
png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
png_ptr->row_info.width);
png_debug1(3, "row_info->color_type = %d", png_ptr->row_info.color_type);
png_debug1(3, "row_info->width = %u", png_ptr->row_info.width);
png_debug1(3, "row_info->channels = %d", png_ptr->row_info.channels);
png_debug1(3, "row_info->bit_depth = %d", png_ptr->row_info.bit_depth);
png_debug1(3, "row_info->pixel_depth = %d", png_ptr->row_info.pixel_depth);
png_debug1(3, "row_info->rowbytes = %lu",
(unsigned long)png_ptr->row_info.rowbytes);
png_debug1(3, "row_info->color_type = %d", row_info.color_type);
png_debug1(3, "row_info->width = %u", row_info.width);
png_debug1(3, "row_info->channels = %d", row_info.channels);
png_debug1(3, "row_info->bit_depth = %d", row_info.bit_depth);
png_debug1(3, "row_info->pixel_depth = %d", row_info.pixel_depth);
png_debug1(3, "row_info->rowbytes = %lu", (unsigned long)row_info.rowbytes);
/* Copy user's row into buffer, leaving room for filter byte. */
png_memcpy(png_ptr->row_buf + 1, row, png_ptr->row_info.rowbytes);
png_memcpy(png_ptr->row_buf + 1, row, row_info.rowbytes);
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Handle interlacing */
if (png_ptr->interlaced && png_ptr->pass < 6 &&
(png_ptr->transformations & PNG_INTERLACE))
{
png_do_write_interlace(&(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->pass);
png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass);
/* This should always get caught above, but still ... */
if (!(png_ptr->row_info.width))
if (!(row_info.width))
{
png_write_finish_row(png_ptr);
return;
@ -771,9 +770,16 @@ png_write_row(png_structp png_ptr, png_const_bytep row)
#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
/* Handle other transformations */
if (png_ptr->transformations)
png_do_write_transformations(png_ptr);
png_do_write_transformations(png_ptr, &row_info);
#endif
/* At this point the row_info pixel depth must match the 'transformed' depth,
* which is also the output depth.
*/
if (row_info.pixel_depth != png_ptr->pixel_depth ||
row_info.pixel_depth != png_ptr->transformed_pixel_depth)
png_error(png_ptr, "internal write transform logic error");
#ifdef PNG_MNG_FEATURES_SUPPORTED
/* Write filter_method 64 (intrapixel differencing) only if
* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
@ -788,12 +794,12 @@ png_write_row(png_structp png_ptr, png_const_bytep row)
(png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{
/* Intrapixel differencing */
png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_write_intrapixel(&row_info, png_ptr->row_buf + 1);
}
#endif
/* Find a filter if necessary, filter the row and write it out. */
png_write_find_filter(png_ptr, &(png_ptr->row_info));
png_write_find_filter(png_ptr, &row_info);
if (png_ptr->write_row_fn != NULL)
(*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
@ -879,13 +885,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
png_debug(1, "in png_destroy_write_struct");
if (png_ptr_ptr != NULL)
{
png_ptr = *png_ptr_ptr;
#ifdef PNG_USER_MEM_SUPPORTED
free_fn = png_ptr->free_fn;
mem_ptr = png_ptr->mem_ptr;
#endif
}
#ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr != NULL)

26
reactos/dll/3rdparty/libpng/pngwtran.c vendored
View file

@ -1,7 +1,7 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
* Last changed in libpng 1.5.4 [July 7, 2011]
* Last changed in libpng 1.5.6 [November 3, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -20,7 +20,7 @@
* transformations is significant.
*/
void /* PRIVATE */
png_do_write_transformations(png_structp png_ptr)
png_do_write_transformations(png_structp png_ptr, png_row_infop row_info)
{
png_debug(1, "in png_do_write_transformations");
@ -32,8 +32,8 @@ png_do_write_transformations(png_structp png_ptr)
if (png_ptr->write_user_transform_fn != NULL)
(*(png_ptr->write_user_transform_fn)) /* User write transform
function */
(png_ptr, /* png_ptr */
&(png_ptr->row_info), /* row_info: */
(png_ptr, /* png_ptr */
row_info, /* row_info: */
/* png_uint_32 width; width of row */
/* png_size_t rowbytes; number of bytes in row */
/* png_byte color_type; color type of pixels */
@ -45,50 +45,50 @@ png_do_write_transformations(png_structp png_ptr)
#ifdef PNG_WRITE_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER)
png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_strip_channel(row_info, png_ptr->row_buf + 1,
!(png_ptr->flags & PNG_FLAG_FILLER_AFTER));
#endif
#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_packswap(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_PACK_SUPPORTED
if (png_ptr->transformations & PNG_PACK)
png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_pack(row_info, png_ptr->row_buf + 1,
(png_uint_32)png_ptr->bit_depth);
#endif
#ifdef PNG_WRITE_SWAP_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_swap(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_SHIFT_SUPPORTED
if (png_ptr->transformations & PNG_SHIFT)
png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_do_shift(row_info, png_ptr->row_buf + 1,
&(png_ptr->shift));
#endif
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_ALPHA)
png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_ALPHA)
png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_BGR_SUPPORTED
if (png_ptr->transformations & PNG_BGR)
png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_bgr(row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_WRITE_INVERT_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_MONO)
png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
png_do_invert(row_info, png_ptr->row_buf + 1);
#endif
}

219
reactos/dll/3rdparty/libpng/pngwutil.c vendored
View file

@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* Last changed in libpng 1.5.5 [September 22, 2011]
* Last changed in libpng 1.5.6 [November 3, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -82,39 +82,20 @@ png_write_sig(png_structp png_ptr)
png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
}
/* Write a PNG chunk all at once. The type is an array of ASCII characters
* representing the chunk name. The array must be at least 4 bytes in
* length, and does not need to be null terminated. To be safe, pass the
* pre-defined chunk names here, and if you need a new one, define it
* where the others are defined. The length is the length of the data.
* All the data must be present. If that is not possible, use the
* png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end()
* functions instead.
*/
void PNGAPI
png_write_chunk(png_structp png_ptr, png_const_bytep chunk_name,
png_const_bytep data, png_size_t length)
{
if (png_ptr == NULL)
return;
png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
png_write_chunk_data(png_ptr, data, (png_size_t)length);
png_write_chunk_end(png_ptr);
}
/* Write the start of a PNG chunk. The type is the chunk type.
* The total_length is the sum of the lengths of all the data you will be
* passing in png_write_chunk_data().
*/
void PNGAPI
png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name,
static void
png_write_chunk_header(png_structp png_ptr, png_uint_32 chunk_name,
png_uint_32 length)
{
png_byte buf[8];
png_debug2(0, "Writing %s chunk, length = %lu", chunk_name,
(unsigned long)length);
#if defined(PNG_DEBUG) && (PNG_DEBUG > 0)
PNG_CSTRING_FROM_CHUNK(buf, chunk_name);
png_debug2(0, "Writing %s chunk, length = %lu", buf, (unsigned long)length);
#endif
if (png_ptr == NULL)
return;
@ -128,16 +109,16 @@ png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name,
/* Write the length and the chunk name */
png_save_uint_32(buf, length);
png_memcpy(buf + 4, chunk_name, 4);
png_write_data(png_ptr, buf, (png_size_t)8);
png_save_uint_32(buf + 4, chunk_name);
png_write_data(png_ptr, buf, 8);
/* Put the chunk name into png_ptr->chunk_name */
png_memcpy(png_ptr->chunk_name, chunk_name, 4);
png_ptr->chunk_name = chunk_name;
/* Reset the crc and run it over the chunk name */
png_reset_crc(png_ptr);
png_calculate_crc(png_ptr, chunk_name, 4);
png_calculate_crc(png_ptr, buf + 4, 4);
#ifdef PNG_IO_STATE_SUPPORTED
/* Inform the I/O callback that chunk data will (possibly) be written.
@ -147,10 +128,17 @@ png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name,
#endif
}
/* Write the data of a PNG chunk started with png_write_chunk_start().
void PNGAPI
png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_string,
png_uint_32 length)
{
png_write_chunk_header(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), length);
}
/* Write the data of a PNG chunk started with png_write_chunk_header().
* Note that multiple calls to this function are allowed, and that the
* sum of the lengths from these calls *must* add up to the total_length
* given to png_write_chunk_start().
* given to png_write_chunk_header().
*/
void PNGAPI
png_write_chunk_data(png_structp png_ptr, png_const_bytep data,
@ -171,7 +159,7 @@ png_write_chunk_data(png_structp png_ptr, png_const_bytep data,
}
}
/* Finish a chunk started with png_write_chunk_start(). */
/* Finish a chunk started with png_write_chunk_header(). */
void PNGAPI
png_write_chunk_end(png_structp png_ptr)
{
@ -192,6 +180,40 @@ png_write_chunk_end(png_structp png_ptr)
png_write_data(png_ptr, buf, (png_size_t)4);
}
/* Write a PNG chunk all at once. The type is an array of ASCII characters
* representing the chunk name. The array must be at least 4 bytes in
* length, and does not need to be null terminated. To be safe, pass the
* pre-defined chunk names here, and if you need a new one, define it
* where the others are defined. The length is the length of the data.
* All the data must be present. If that is not possible, use the
* png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end()
* functions instead.
*/
static void
png_write_complete_chunk(png_structp png_ptr, png_uint_32 chunk_name,
png_const_bytep data, png_size_t length)
{
if (png_ptr == NULL)
return;
/* On 64 bit architectures 'length' may not fit in a png_uint_32. */
if (length > PNG_UINT_32_MAX)
png_error(png_ptr, "length exceeds PNG maxima");
png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length);
png_write_chunk_data(png_ptr, data, length);
png_write_chunk_end(png_ptr);
}
/* This is the API that calls the internal function above. */
void PNGAPI
png_write_chunk(png_structp png_ptr, png_const_bytep chunk_string,
png_const_bytep data, png_size_t length)
{
png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data,
length);
}
/* Initialize the compressor for the appropriate type of compression. */
static void
png_zlib_claim(png_structp png_ptr, png_uint_32 state)
@ -560,7 +582,10 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
}
#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
if (comp->input_len >= 2 && comp->input_len < 16384)
/* The zbuf_size test is because the code below doesn't work if zbuf_size is
* '1'; simply skip it to avoid memory overwrite.
*/
if (comp->input_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1)
{
unsigned int z_cmf; /* zlib compression method and flags */
@ -652,8 +677,6 @@ 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)
{
PNG_IHDR;
png_byte buf[13]; /* Buffer to store the IHDR info */
png_debug(1, "in png_write_IHDR");
@ -795,7 +818,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
buf[12] = (png_byte)interlace_type;
/* Write the chunk */
png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
/* Initialize zlib with PNG info */
png_ptr->zstream.zalloc = png_zalloc;
@ -872,7 +895,6 @@ void /* PRIVATE */
png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
png_uint_32 num_pal)
{
PNG_PLTE;
png_uint_32 i;
png_const_colorp pal_ptr;
png_byte buf[3];
@ -908,7 +930,7 @@ png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
png_ptr->num_palette = (png_uint_16)num_pal;
png_debug1(3, "num_palette = %d", png_ptr->num_palette);
png_write_chunk_start(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
png_write_chunk_header(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
#ifdef PNG_POINTER_INDEXING_SUPPORTED
for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
@ -942,8 +964,6 @@ png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
void /* PRIVATE */
png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
{
PNG_IDAT;
png_debug(1, "in png_write_IDAT");
#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
@ -1014,7 +1034,7 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
}
#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */
png_write_chunk(png_ptr, png_IDAT, data, length);
png_write_complete_chunk(png_ptr, png_IDAT, data, length);
png_ptr->mode |= PNG_HAVE_IDAT;
/* Prior to 1.5.4 this code was replicated in every caller (except at the
@ -1029,11 +1049,9 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
void /* PRIVATE */
png_write_IEND(png_structp png_ptr)
{
PNG_IEND;
png_debug(1, "in png_write_IEND");
png_write_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
png_write_complete_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
png_ptr->mode |= PNG_HAVE_IEND;
}
@ -1042,14 +1060,13 @@ png_write_IEND(png_structp png_ptr)
void /* PRIVATE */
png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
{
PNG_gAMA;
png_byte buf[4];
png_debug(1, "in png_write_gAMA");
/* file_gamma is saved in 1/100,000ths */
png_save_uint_32(buf, (png_uint_32)file_gamma);
png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
png_write_complete_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
}
#endif
@ -1058,7 +1075,6 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
void /* PRIVATE */
png_write_sRGB(png_structp png_ptr, int srgb_intent)
{
PNG_sRGB;
png_byte buf[1];
png_debug(1, "in png_write_sRGB");
@ -1068,7 +1084,7 @@ png_write_sRGB(png_structp png_ptr, int srgb_intent)
"Invalid sRGB rendering intent specified");
buf[0]=(png_byte)srgb_intent;
png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
png_write_complete_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
}
#endif
@ -1078,7 +1094,6 @@ void /* PRIVATE */
png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
png_const_charp profile, int profile_len)
{
PNG_iCCP;
png_size_t name_len;
png_charp new_name;
compression_state comp;
@ -1139,7 +1154,7 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
(png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
/* Make sure we include the NULL after the name and the compression type */
png_write_chunk_start(png_ptr, png_iCCP,
png_write_chunk_header(png_ptr, png_iCCP,
(png_uint_32)(name_len + profile_len + 2));
new_name[name_len + 1] = 0x00;
@ -1163,7 +1178,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
void /* PRIVATE */
png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
{
PNG_sPLT;
png_size_t name_len;
png_charp new_name;
png_byte entrybuf[10];
@ -1180,7 +1194,7 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
return;
/* Make sure we include the NULL after the name */
png_write_chunk_start(png_ptr, png_sPLT,
png_write_chunk_header(png_ptr, png_sPLT,
(png_uint_32)(name_len + 2 + palette_size));
png_write_chunk_data(png_ptr, (png_bytep)new_name,
@ -1248,7 +1262,6 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
void /* PRIVATE */
png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type)
{
PNG_sBIT;
png_byte buf[4];
png_size_t size;
@ -1299,7 +1312,7 @@ png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type)
buf[size++] = sbit->alpha;
}
png_write_chunk(png_ptr, png_sBIT, buf, size);
png_write_complete_chunk(png_ptr, png_sBIT, buf, size);
}
#endif
@ -1311,7 +1324,6 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x,
png_fixed_point blue_y)
{
PNG_cHRM;
png_byte buf[32];
png_debug(1, "in png_write_cHRM");
@ -1334,7 +1346,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
png_save_uint_32(buf + 24, (png_uint_32)blue_x);
png_save_uint_32(buf + 28, (png_uint_32)blue_y);
png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
png_write_complete_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
}
}
#endif
@ -1345,7 +1357,6 @@ void /* PRIVATE */
png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
png_const_color_16p tran, int num_trans, int color_type)
{
PNG_tRNS;
png_byte buf[6];
png_debug(1, "in png_write_tRNS");
@ -1359,7 +1370,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
}
/* Write the chunk out as it is */
png_write_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
}
else if (color_type == PNG_COLOR_TYPE_GRAY)
@ -1374,7 +1385,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
}
png_save_uint_16(buf, tran->gray);
png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
}
else if (color_type == PNG_COLOR_TYPE_RGB)
@ -1394,7 +1405,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
return;
}
png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
}
else
@ -1409,7 +1420,6 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
void /* PRIVATE */
png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
{
PNG_bKGD;
png_byte buf[6];
png_debug(1, "in png_write_bKGD");
@ -1428,7 +1438,7 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
}
buf[0] = back->index;
png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
}
else if (color_type & PNG_COLOR_MASK_COLOR)
@ -1448,7 +1458,7 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
return;
}
png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
}
else
@ -1462,7 +1472,7 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
}
png_save_uint_16(buf, back->gray);
png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
}
}
#endif
@ -1472,7 +1482,6 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
void /* PRIVATE */
png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
{
PNG_hIST;
int i;
png_byte buf[3];
@ -1487,7 +1496,7 @@ png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
return;
}
png_write_chunk_start(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
png_write_chunk_header(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
for (i = 0; i < num_hist; i++)
{
@ -1637,7 +1646,6 @@ void /* PRIVATE */
png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
png_size_t text_len)
{
PNG_tEXt;
png_size_t key_len;
png_charp new_key;
@ -1653,7 +1661,7 @@ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
text_len = png_strlen(text);
/* Make sure we include the 0 after the key */
png_write_chunk_start(png_ptr, png_tEXt,
png_write_chunk_header(png_ptr, png_tEXt,
(png_uint_32)(key_len + text_len + 1));
/*
* We leave it to the application to meet PNG-1.0 requirements on the
@ -1679,7 +1687,6 @@ void /* PRIVATE */
png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
png_size_t text_len, int compression)
{
PNG_zTXt;
png_size_t key_len;
png_byte buf;
png_charp new_key;
@ -1713,7 +1720,7 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
&comp);
/* Write start of chunk */
png_write_chunk_start(png_ptr, png_zTXt,
png_write_chunk_header(png_ptr, png_zTXt,
(png_uint_32)(key_len+text_len + 2));
/* Write key */
@ -1742,7 +1749,6 @@ void /* PRIVATE */
png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
png_const_charp lang, png_const_charp lang_key, png_const_charp text)
{
PNG_iTXt;
png_size_t lang_len, key_len, lang_key_len, text_len;
png_charp new_lang;
png_charp new_key = NULL;
@ -1787,7 +1793,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
* and the NULs after the key, lang, and lang_key parts
*/
png_write_chunk_start(png_ptr, png_iTXt, (png_uint_32)(
png_write_chunk_header(png_ptr, png_iTXt, (png_uint_32)(
5 /* comp byte, comp flag, terminators for key, lang and lang_key */
+ key_len
+ lang_len
@ -1836,7 +1842,6 @@ void /* PRIVATE */
png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
int unit_type)
{
PNG_oFFs;
png_byte buf[9];
png_debug(1, "in png_write_oFFs");
@ -1848,7 +1853,7 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
png_save_int_32(buf + 4, y_offset);
buf[8] = (png_byte)unit_type;
png_write_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
png_write_complete_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
}
#endif
#ifdef PNG_WRITE_pCAL_SUPPORTED
@ -1858,7 +1863,6 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_int_32 X1, int type, int nparams, png_const_charp units,
png_charpp params)
{
PNG_pCAL;
png_size_t purpose_len, units_len, total_len;
png_size_tp params_len;
png_byte buf[10];
@ -1891,7 +1895,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
}
png_debug1(3, "pCAL total length = %d", (int)total_len);
png_write_chunk_start(png_ptr, png_pCAL, (png_uint_32)total_len);
png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len);
png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose, purpose_len);
png_save_int_32(buf, X0);
png_save_int_32(buf + 4, X1);
@ -1918,7 +1922,6 @@ void /* PRIVATE */
png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width,
png_const_charp height)
{
PNG_sCAL;
png_byte buf[64];
png_size_t wlen, hlen, total_len;
@ -1939,7 +1942,7 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width,
png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */
png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
png_write_chunk(png_ptr, png_sCAL, buf, total_len);
png_write_complete_chunk(png_ptr, png_sCAL, buf, total_len);
}
#endif
@ -1950,7 +1953,6 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
png_uint_32 y_pixels_per_unit,
int unit_type)
{
PNG_pHYs;
png_byte buf[9];
png_debug(1, "in png_write_pHYs");
@ -1962,7 +1964,7 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
png_save_uint_32(buf + 4, y_pixels_per_unit);
buf[8] = (png_byte)unit_type;
png_write_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
png_write_complete_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
}
#endif
@ -1973,7 +1975,6 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
void /* PRIVATE */
png_write_tIME(png_structp png_ptr, png_const_timep mod_time)
{
PNG_tIME;
png_byte buf[7];
png_debug(1, "in png_write_tIME");
@ -1993,7 +1994,7 @@ png_write_tIME(png_structp png_ptr, png_const_timep mod_time)
buf[5] = mod_time->minute;
buf[6] = mod_time->second;
png_write_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
png_write_complete_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
}
#endif
@ -2005,28 +2006,32 @@ png_write_start_row(png_structp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
png_size_t buf_size;
png_alloc_size_t buf_size;
int usr_pixel_depth;
png_debug(1, "in png_write_start_row");
buf_size = (png_size_t)(PNG_ROWBYTES(
png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
usr_pixel_depth = png_ptr->usr_channels * png_ptr->usr_bit_depth;
buf_size = PNG_ROWBYTES(usr_pixel_depth, png_ptr->width) + 1;
/* 1.5.6: added to allow checking in the row write code. */
png_ptr->transformed_pixel_depth = png_ptr->pixel_depth;
png_ptr->maximum_pixel_depth = (png_byte)usr_pixel_depth;
/* Set up row buffer */
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
(png_alloc_size_t)buf_size);
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, buf_size);
png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
@ -2043,8 +2048,7 @@ png_write_start_row(png_structp png_ptr)
if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
{
/* Set up previous row buffer */
png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
(png_alloc_size_t)buf_size);
png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, buf_size);
if (png_ptr->do_filter & PNG_FILTER_UP)
{
@ -2112,16 +2116,16 @@ png_write_finish_row(png_structp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
int ret;
@ -2239,10 +2243,10 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
png_debug(1, "in png_do_write_interlace");
@ -2410,7 +2414,8 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
* been specified by the application, and then writes the row out with the
* chosen filter.
*/
static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row);
static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row,
png_size_t row_bytes);
#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1)
#define PNG_HISHIFT 10
@ -2426,7 +2431,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_byte filter_to_do = png_ptr->do_filter;
png_size_t row_bytes = row_info->rowbytes;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
int num_p_filters = (int)png_ptr->num_prev_filters;
int num_p_filters = png_ptr->num_prev_filters;
#endif
png_debug(1, "in png_write_find_filter");
@ -3063,9 +3068,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
}
}
#endif /* PNG_WRITE_FILTER_SUPPORTED */
/* Do the actual writing of the filtered row data from the chosen filter. */
png_write_filtered_row(png_ptr, best_row);
/* Do the actual writing of the filtered row data from the chosen filter. */
png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
#ifdef PNG_WRITE_FILTER_SUPPORTED
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
@ -3088,10 +3093,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
/* Do the actual writing of a previously filtered row. */
static void
png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row,
png_size_t avail/*includes filter byte*/)
{
png_size_t avail;
png_debug(1, "in png_write_filtered_row");
png_debug1(2, "filter = %d", filtered_row[0]);
@ -3099,7 +3103,6 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
png_ptr->zstream.next_in = filtered_row;
png_ptr->zstream.avail_in = 0;
avail = png_ptr->row_info.rowbytes + 1;
/* Repeat until we have compressed all the data */
do
{