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[CHG] libpng updated to version 1.5.6

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This commit is contained in:
Crayon2000 2011-11-07 16:43:36 +00:00
parent bfa2636b23
commit 54ded632b6
15 changed files with 1484 additions and 1085 deletions
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120
GRRLIB/lib/png/png.c
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 1.5.6 [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.)
@ -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_6 Your_png_h_is_not_version_1_5_6;
/* 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;
@ -645,13 +645,13 @@ 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 1.5.6 - November 3, 2011" 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 1.5.6 - November 3, 2011\
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 +698,43 @@ 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. */
@ -2645,6 +2663,60 @@ 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 +2727,18 @@ 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,

57
GRRLIB/lib/png/png.h
View file

@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.5.5 - September 22, 2011
* libpng version 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.)
@ -11,7 +11,7 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.5.5 - September 22, 2011: Glenn
* libpng versions 0.97, January 1998, through 1.5.6 - November 3, 2011: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@ -160,6 +160,9 @@
* 1.5.5beta01-08 15 10505 15.so.15.5[.0]
* 1.5.5rc01 15 10505 15.so.15.5[.0]
* 1.5.5 15 10505 15.so.15.5[.0]
* 1.5.6beta01-07 15 10506 15.so.15.6[.0]
* 1.5.6rc01-03 15 10506 15.so.15.6[.0]
* 1.5.6 15 10506 15.so.15.6[.0]
*
* Henceforth the source version will match the shared-library major
* and minor numbers; the shared-library major version number will be
@ -191,7 +194,7 @@
*
* This code is released under the libpng license.
*
* libpng versions 1.2.6, August 15, 2004, through 1.5.5, September 22, 2011, are
* libpng versions 1.2.6, August 15, 2004, through 1.5.6, November 3, 2011, are
* Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors:
@ -303,13 +306,13 @@
* Y2K compliance in libpng:
* =========================
*
* September 22, 2011
* November 3, 2011
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
* upward through 1.5.5 are Y2K compliant. It is my belief that
* upward through 1.5.6 are Y2K compliant. It is my belief that
* earlier versions were also Y2K compliant.
*
* Libpng only has two year fields. One is a 2-byte unsigned integer
@ -364,9 +367,9 @@
*/
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.5.5"
#define PNG_LIBPNG_VER_STRING "1.5.6"
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.5.5 - September 22, 2011\n"
" libpng version 1.5.6 - November 3, 2011\n"
#define PNG_LIBPNG_VER_SONUM 15
#define PNG_LIBPNG_VER_DLLNUM 15
@ -374,7 +377,7 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 5
#define PNG_LIBPNG_VER_RELEASE 5
#define PNG_LIBPNG_VER_RELEASE 6
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
*/
@ -404,7 +407,7 @@
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
*/
#define PNG_LIBPNG_VER 10505 /* 1.5.5 */
#define PNG_LIBPNG_VER 10506 /* 1.5.6 */
/* Library configuration: these options cannot be changed after
* the library has been built.
@ -526,7 +529,7 @@ extern "C" {
/* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number.
*/
typedef char* png_libpng_version_1_5_5;
typedef char* png_libpng_version_1_5_6;
/* Three color definitions. The order of the red, green, and blue, (and the
* exact size) is not important, although the size of the fields need to
@ -1830,6 +1833,7 @@ PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save));
*/
PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp));
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Function that combines rows. 'new_row' is a flag that should come from
* the callback and be non-NULL if anything needs to be done; the library
* stores its own version of the new data internally and ignores the passed
@ -1837,6 +1841,7 @@ PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp));
*/
PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr,
png_bytep old_row, png_const_bytep new_row));
#endif /* PNG_READ_INTERLACING_SUPPORTED */
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
PNG_EXPORTA(94, png_voidp, png_malloc,
@ -2305,15 +2310,21 @@ PNG_EXPORT(171, void, png_set_sCAL_s,
/* Provide a list of chunks and how they are to be handled, if the built-in
handling or default unknown chunk handling is not desired. Any chunks not
listed will be handled in the default manner. The IHDR and IEND chunks
must not be listed.
keep = 0: follow default behavior
= 1: do not keep
= 2: keep only if safe-to-copy
= 3: keep even if unsafe-to-copy
must not be listed. Because this turns off the default handling for chunks
that would otherwise be recognized the behavior of libpng transformations may
well become incorrect!
keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior
= 1: PNG_HANDLE_CHUNK_NEVER: do not keep
= 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy
= 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy
*/
PNG_EXPORT(172, void, png_set_keep_unknown_chunks,
(png_structp png_ptr, int keep,
png_const_bytep chunk_list, int num_chunks));
/* The handling code is returned; the result is therefore true (non-zero) if
* special handling is required, false for the default handling.
*/
PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr,
png_const_bytep chunk_name));
#endif
@ -2453,8 +2464,16 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
* full, image which appears in a given pass. 'pass' is in the range 0
* to 6 and the result is in the range 0 to 7.
*/
#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7)
#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7)
#define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7)
#define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7)
/* A macro to return the offset between pixels in the output row for a pair of
* pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that
* follows. Note that ROW_OFFSET is the offset from one row to the next whereas
* COL_OFFSET is from one column to the next, within a row.
*/
#define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8)
#define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1))
/* Two macros to help evaluate the number of rows or columns in each
* pass. This is expressed as a shift - effectively log2 of the number or
@ -2489,8 +2508,8 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
* the tile.
*/
#define PNG_PASS_MASK(pass,off) ( \
((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \
((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U))
((0x110145AF>>(((7-(off))-(pass))<<2)) & 0xF) | \
((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0))
#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \
((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1)

2
GRRLIB/lib/png/pngconf.h
View file

@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.5.5 - September 22, 2011
* libpng version 1.5.6 - November 3, 2011
*
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

16
GRRLIB/lib/png/pngerror.c
View file

@ -1,7 +1,7 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* 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.)
@ -374,11 +374,14 @@ 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 +392,7 @@ 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 +401,11 @@ 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++];

16
GRRLIB/lib/png/pngget.c
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 1.5.6 [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.)
@ -950,9 +950,8 @@ 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 +1068,6 @@ 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 +1109,14 @@ 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 */

244
GRRLIB/lib/png/pngpread.c
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 1.5.6 [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.)
@ -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)
{
@ -809,11 +767,12 @@ 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 +782,11 @@ 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 +798,7 @@ 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 +972,56 @@ 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(&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)
{
@ -1223,20 +1204,20 @@ png_read_push_finish_row(png_structp png_ptr)
/* 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};
*/
png_ptr->row_number++;
@ -1714,11 +1695,12 @@ 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
@ -1731,22 +1713,26 @@ 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);
/* The following cast should be safe because of the check above. */
png_ptr->unknown_chunk.size = (png_size_t)length;
if (length == 0)
@ -1755,8 +1741,9 @@ 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 +1759,8 @@ 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 +1803,22 @@ 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,

206
GRRLIB/lib/png/pngpriv.h
View file

@ -6,7 +6,7 @@
* (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 1.5.5 [September 22, 2011]
* Last changed in libpng 1.5.6 [November 3, 2011]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -44,6 +44,9 @@
*/
#include <stdlib.h>
/* This is used to find 'offsetof', used below for alignment tests. */
#include <stddef.h>
#define PNGLIB_BUILD /*libpng is being built, not used*/
#ifdef PNG_USER_CONFIG
@ -321,6 +324,52 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define png_memset memset
# endif
#endif
/* These macros may need to be architecture dependent. */
#define PNG_ALIGN_NONE 0 /* do not use data alignment */
#define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */
#ifdef offsetof
# define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */
#else
# define PNG_ALIGN_OFFSET -1 /* prevent the use of this */
#endif
#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */
#ifndef PNG_ALIGN_TYPE
/* Default to using aligned access optimizations and requiring alignment to a
* multiple of the data type size. Override in a compiler specific fashion
* if necessary by inserting tests here:
*/
# define PNG_ALIGN_TYPE PNG_ALIGN_SIZE
#endif
#if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE
/* This is used because in some compiler implementations non-aligned
* structure members are supported, so the offsetof approach below fails.
* Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access
* is good for performance. Do not do this unless you have tested the result
* and understand it.
*/
# define png_alignof(type) (sizeof (type))
#else
# if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET
# define png_alignof(type) offsetof(struct{char c; type t;}, t)
# else
# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS
# define png_alignof(type) (1)
# endif
/* Else leave png_alignof undefined to prevent use thereof */
# endif
#endif
/* This implicitly assumes alignment is always to a power of 2. */
#ifdef png_alignof
# define png_isaligned(ptr, type)\
((((const char*)ptr-(const char*)0) & (png_alignof(type)-1)) == 0)
#else
# define png_isaligned(ptr, type) 0
#endif
/* End of memory model/platform independent support */
/* End of 1.5.0beta36 move from pngconf.h */
@ -502,32 +551,70 @@ PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
#endif
#endif
/* Constant strings for known chunk types. If you need to add a chunk,
* define the name here, and add an invocation of the macro wherever it's
* needed.
/* Constants for known chunk types. If you need to add a chunk, define the name
* here. For historical reasons these constants have the form png_<name>; i.e.
* the prefix is lower case. Please use decimal values as the parameters to
* match the ISO PNG specification and to avoid relying on the C locale
* interpretation of character values.
*
* Prior to 1.5.6 these constants were strings, as of 1.5.6 png_uint_32 values
* are computed and a new macro (PNG_STRING_FROM_CHUNK) added to allow a string
* to be generated if required.
*
* PNG_32b correctly produces a value shifted by up to 24 bits, even on
* architectures where (int) is only 16 bits.
*/
#define PNG_IHDR PNG_CONST png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'}
#define PNG_IDAT PNG_CONST png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'}
#define PNG_IEND PNG_CONST png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'}
#define PNG_PLTE PNG_CONST png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'}
#define PNG_bKGD PNG_CONST png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'}
#define PNG_cHRM PNG_CONST png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'}
#define PNG_gAMA PNG_CONST png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'}
#define PNG_hIST PNG_CONST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'}
#define PNG_iCCP PNG_CONST png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'}
#define PNG_iTXt PNG_CONST png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'}
#define PNG_oFFs PNG_CONST png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'}
#define PNG_pCAL PNG_CONST png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'}
#define PNG_sCAL PNG_CONST png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'}
#define PNG_pHYs PNG_CONST png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'}
#define PNG_sBIT PNG_CONST png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'}
#define PNG_sPLT PNG_CONST png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'}
#define PNG_sRGB PNG_CONST png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'}
#define PNG_sTER PNG_CONST png_byte png_sTER[5] = {115, 84, 69, 82, '\0'}
#define PNG_tEXt PNG_CONST png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'}
#define PNG_tIME PNG_CONST png_byte png_tIME[5] = {116, 73, 77, 69, '\0'}
#define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
#define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
#define PNG_32b(b,s) ((png_uint_32)(b) << (s))
#define PNG_CHUNK(b1,b2,b3,b4) \
(PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0))
#define png_IHDR PNG_CHUNK( 73, 72, 68, 82)
#define png_IDAT PNG_CHUNK( 73, 68, 65, 84)
#define png_IEND PNG_CHUNK( 73, 69, 78, 68)
#define png_PLTE PNG_CHUNK( 80, 76, 84, 69)
#define png_bKGD PNG_CHUNK( 98, 75, 71, 68)
#define png_cHRM PNG_CHUNK( 99, 72, 82, 77)
#define png_gAMA PNG_CHUNK(103, 65, 77, 65)
#define png_hIST PNG_CHUNK(104, 73, 83, 84)
#define png_iCCP PNG_CHUNK(105, 67, 67, 80)
#define png_iTXt PNG_CHUNK(105, 84, 88, 116)
#define png_oFFs PNG_CHUNK(111, 70, 70, 115)
#define png_pCAL PNG_CHUNK(112, 67, 65, 76)
#define png_sCAL PNG_CHUNK(115, 67, 65, 76)
#define png_pHYs PNG_CHUNK(112, 72, 89, 115)
#define png_sBIT PNG_CHUNK(115, 66, 73, 84)
#define png_sPLT PNG_CHUNK(115, 80, 76, 84)
#define png_sRGB PNG_CHUNK(115, 82, 71, 66)
#define png_sTER PNG_CHUNK(115, 84, 69, 82)
#define png_tEXt PNG_CHUNK(116, 69, 88, 116)
#define png_tIME PNG_CHUNK(116, 73, 77, 69)
#define png_tRNS PNG_CHUNK(116, 82, 78, 83)
#define png_zTXt PNG_CHUNK(122, 84, 88, 116)
/* The following will work on (signed char*) strings, whereas the get_uint_32
* macro will fail on top-bit-set values because of the sign extension.
*/
#define PNG_CHUNK_FROM_STRING(s)\
PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3])
/* This uses (char), not (png_byte) to avoid warnings on systems where (char) is
* signed and the argument is a (char[]) This macro will fail miserably on
* systems where (char) is more than 8 bits.
*/
#define PNG_STRING_FROM_CHUNK(s,c)\
(void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\
((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c)))
/* Do the same but terminate with a null character. */
#define PNG_CSTRING_FROM_CHUNK(s,c)\
(void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0)
/* Test on flag values as defined in the spec (section 5.4): */
#define PNG_CHUNK_ANCILLIARY(c) (1 & ((c) >> 29))
#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLIARY(c))
#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21))
#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13))
#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5))
/* Gamma values (new at libpng-1.5.4): */
#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */
@ -784,17 +871,44 @@ PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
/* Internal use only. Called before first row of data */
PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr));
/* Combine a row of data, dealing with alpha, etc. if requested */
/* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an
* array of png_ptr->width pixels. If the image is not interlaced or this
* is the final pass this just does a png_memcpy, otherwise the "display" flag
* is used to determine whether to copy pixels that are not in the current pass.
*
* Because 'png_do_read_interlace' (below) replicates pixels this allows this
* function to achieve the documented 'blocky' appearance during interlaced read
* if display is 1 and the 'sparkle' appearance, where existing pixels in 'row'
* are not changed if they are not in the current pass, when display is 0.
*
* 'display' must be 0 or 1, otherwise the memcpy will be done regardless.
*
* The API always reads from the png_struct row buffer and always assumes that
* it is full width (png_do_read_interlace has already been called.)
*
* This function is only ever used to write to row buffers provided by the
* caller of the relevant libpng API and the row must have already been
* transformed by the read transformations.
*
* The PNG_USE_COMPILE_TIME_MASKS option causes generation of pre-computed
* bitmasks for use within the code, otherwise runtime generated masks are used.
* The default is compile time masks.
*/
#ifndef PNG_USE_COMPILE_TIME_MASKS
# define PNG_USE_COMPILE_TIME_MASKS 1
#endif
PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
int mask));
int display));
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Expand an interlaced row */
/* OLD pre-1.0.9 interface:
/* Expand an interlaced row: the 'row_info' describes the pass data that has
* been read in and must correspond to the pixels in 'row', the pixels are
* expanded (moved apart) in 'row' to match the final layout, when doing this
* the pixels are *replicated* to the intervening space. This is essential for
* the correct operation of png_combine_row, above.
*/
PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info,
png_bytep row, int pass, png_uint_32 transformations));
*/
PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr));
#endif
/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */
@ -805,10 +919,11 @@ PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
png_bytep row, int pass));
#endif
/* Unfilter a row */
PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr,
png_row_infop row_info, png_bytep row, png_const_bytep prev_row,
int filter));
/* Unfilter a row: check the filter value before calling this, there is no point
* calling it for PNG_FILTER_VALUE_NONE.
*/
PNG_EXTERN void png_read_filter_row PNGARG((png_row_infop row_info,
png_bytep row, png_const_bytep prev_row, int filter));
/* Choose the best filter to use and filter the row data */
PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr,
@ -1058,18 +1173,30 @@ PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
png_uint_32 length));
#endif
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 length));
#endif
PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
png_const_bytep chunk_name));
png_uint_32 chunk_name));
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
/* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk
* name, not a string.
*/
PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr,
png_uint_32 chunk_name));
#endif
/* Handle the transformations for reading and writing */
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr));
PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr,
png_row_infop row_info));
#endif
#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr));
PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr,
png_row_infop row_info));
#endif
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
@ -1441,6 +1568,7 @@ PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value,
png_fixed_point gamma_value));
PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value,
png_fixed_point gamma_value));
PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr);
PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
int bit_depth));
#endif

391
GRRLIB/lib/png/pngread.c
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 1.5.6 [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.)
@ -190,89 +190,35 @@ 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 +231,10 @@ 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 +249,87 @@ 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 +348,7 @@ 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 +368,8 @@ 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 +377,30 @@ 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 +442,12 @@ 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 +456,7 @@ 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 +466,7 @@ 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 +477,7 @@ 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 +488,7 @@ 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 +499,7 @@ 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 +509,7 @@ 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 +545,7 @@ 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 +575,72 @@ 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(&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 +806,31 @@ 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 +840,91 @@ 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 +1032,13 @@ 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 +1046,6 @@ 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 +1063,6 @@ 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

356
GRRLIB/lib/png/pngrtran.c
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 1.5.6 [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.)
@ -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 */
@ -1650,8 +1641,9 @@ 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 +1667,45 @@ 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
@ -1714,6 +1717,9 @@ 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 */
@ -1788,26 +1794,38 @@ 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 */
@ -1913,12 +1931,14 @@ 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 +1978,8 @@ 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 +2036,7 @@ 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 +2067,9 @@ 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 +2077,11 @@ 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 +2090,9 @@ 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 +2100,7 @@ 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)
@ -2133,13 +2154,13 @@ 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
@ -2151,27 +2172,27 @@ png_do_read_transformations(png_structp png_ptr)
(png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) &&
#endif
(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 +2201,16 @@ 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 +2222,62 @@ 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 +2286,8 @@ 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 +2297,15 @@ 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 +2419,128 @@ 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);
}
@ -3060,7 +3103,7 @@ 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);
@ -3306,7 +3349,7 @@ 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 +3419,8 @@ 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 +4128,7 @@ 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

813
GRRLIB/lib/png/pngrutil.c
View file

File diff suppressed because it is too large Load diff

7
GRRLIB/lib/png/pngset.c
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 1.5.6 [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.)
@ -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);

37
GRRLIB/lib/png/pngstruct.h
View file

@ -104,13 +104,17 @@ struct png_struct_def
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_bytep prev_row; /* buffer to save previous (unfiltered) row */
png_bytep row_buf; /* buffer to save current (unfiltered) row */
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_row_info row_info; /* used for transformation routines */
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 */
@ -118,7 +122,6 @@ struct png_struct_def
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 chunk_name[5]; /* null-terminated name of current chunk */
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 */
@ -126,11 +129,17 @@ struct png_struct_def
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 */
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 */
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 */
@ -152,19 +161,21 @@ struct png_struct_def
png_uint_32 flush_rows; /* number of rows written since last flush */
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
#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) */
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
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_table; /* gamma table for 16-bit depth files */
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)
@ -329,9 +340,8 @@ struct png_struct_def
png_unknown_chunk unknown_chunk;
#endif
/* New members added in libpng-1.2.26 */
/* New member added in libpng-1.2.26 */
png_size_t old_big_row_buf_size;
png_size_t old_prev_row_size;
/* New member added in libpng-1.2.30 */
png_charp chunkdata; /* buffer for reading chunk data */
@ -340,5 +350,8 @@ struct png_struct_def
/* 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;
};
#endif /* PNGSTRUCT_H */

59
GRRLIB/lib/png/pngwrite.c
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 1.5.6 [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.)
@ -608,6 +608,9 @@ 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 +734,31 @@ 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 +769,16 @@ 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 +793,12 @@ 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 +884,7 @@ 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
GRRLIB/lib/png/pngwtran.c
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
GRRLIB/lib/png/pngwutil.c
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
{