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Imported from libpng-1.0.5s.tar

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This commit is contained in:
Glenn Randers-Pehrson
2000-02-18 13:48:52 -06:00
parent 61c32d9e66
commit a77ef625a6
47 changed files with 532 additions and 544 deletions
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26
pngrutil.c
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@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* libpng 1.0.5q - February 5, 2000
* libpng 1.0.5s - February 18, 2000
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -14,10 +14,6 @@
#define PNG_INTERNAL
#include "png.h"
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
#include "pngasmrd.h"
#endif
#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
png_uint_32
@@ -398,7 +394,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
num = (int)length / 3;
palette = (png_colorp)png_zalloc(png_ptr, (uInt)num, sizeof (png_color));
png_ptr->flags |= PNG_FLAG_FREE_PALETTE;
png_ptr->free_me |= PNG_FREE_PLTE;
for (i = 0; i < num; i++)
{
png_byte buf[3];
@@ -436,7 +432,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
else
{
png_chunk_warning(png_ptr, "CRC error");
png_ptr->flags &= ~PNG_FLAG_FREE_PALETTE;
png_ptr->free_me &= ~PNG_FREE_PLTE;
png_zfree(png_ptr, palette);
return;
}
@@ -928,6 +924,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
png_ptr->free_me |= PNG_FREE_ICCP;
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
@@ -1058,7 +1055,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* discard all chunk data except the name and stash that */
new_palette.name = (png_charp)chunkdata;
png_set_spalettes(png_ptr, info_ptr, &new_palette, 1);
png_set_sPLT(png_ptr, info_ptr, &new_palette, 1);
png_free(png_ptr, chunkdata);
png_free(png_ptr, new_palette.entries);
@@ -1107,7 +1104,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
png_ptr->trans = (png_bytep)png_malloc(png_ptr, length);
png_ptr->flags |= PNG_FLAG_FREE_TRANS;
png_ptr->free_me |= PNG_FREE_TRNS;
png_crc_read(png_ptr, png_ptr->trans, (png_size_t)length);
png_ptr->num_trans = (png_uint_16)length;
}
@@ -1287,7 +1284,7 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
num = (int)length / 2 ;
png_ptr->hist = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(num * sizeof (png_uint_16)));
png_ptr->flags |= PNG_FLAG_FREE_HIST;
png_ptr->free_me |= PNG_FREE_HIST;
for (i = 0; i < num; i++)
{
png_byte buf[2];
@@ -2802,7 +2799,14 @@ png_read_start_row(png_structp png_ptr)
else
{
if (max_pixel_depth <= 8)
max_pixel_depth = 24;
{
if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
max_pixel_depth = 32;
else
max_pixel_depth = 24;
}
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
max_pixel_depth = 64;
else
max_pixel_depth = 48;
}