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[master] Imported from libpng-1.2.41beta01.tar

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Glenn Randers-Pehrson
2009-09-25 12:05:36 -05:00
parent 1b6f6d80ea
commit ac13f5e6f9
51 changed files with 353 additions and 256 deletions
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81
pngget.c
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@@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct
*
* Last changed in libpng 1.2.37 [June 4, 2009]
* Last changed in libpng 1.2.41 [September 25, 2009]
* Copyright (c) 1998-2009 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.)
@@ -566,53 +566,44 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *width, png_uint_32 *height, int *bit_depth,
int *color_type, int *interlace_type, int *compression_type,
int *filter_type)
{
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
bit_depth != NULL && color_type != NULL)
int test_interlace_type = 0;
int test_compression_type = 0;
int test_filter_type = 0;
png_debug1(1, "in %s retrieval function", "IHDR");
if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
height == NULL || bit_depth == NULL || color_type == NULL)
return (0);
*width = info_ptr->width;
*height = info_ptr->height;
*bit_depth = info_ptr->bit_depth;
*color_type = info_ptr->color_type;
if (compression_type != NULL)
{
png_debug1(1, "in %s retrieval function", "IHDR");
*width = info_ptr->width;
*height = info_ptr->height;
*bit_depth = info_ptr->bit_depth;
if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
png_error(png_ptr, "Invalid bit depth");
*color_type = info_ptr->color_type;
if (info_ptr->color_type > 6)
png_error(png_ptr, "Invalid color type");
if (compression_type != NULL)
*compression_type = info_ptr->compression_type;
if (filter_type != NULL)
*filter_type = info_ptr->filter_type;
if (interlace_type != NULL)
*interlace_type = info_ptr->interlace_type;
/* Check for potential overflow of rowbytes */
if (*width == 0 || *width > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image width");
if (*height == 0 || *height > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image height");
if (info_ptr->width > (PNG_UINT_32_MAX
>> 3) /* 8-byte RGBA pixels */
- 64 /* bigrowbuf hack */
- 1 /* filter byte */
- 7*8 /* rounding of width to multiple of 8 pixels */
- 8) /* extra max_pixel_depth pad */
{
png_warning(png_ptr,
"Width too large for libpng to process image data.");
}
return (1);
*compression_type = info_ptr->compression_type;
test_compression_type = *compression_type;
}
return (0);
if (filter_type != NULL)
{
*filter_type = info_ptr->filter_type;
test_filter_type = *filter_type;
}
if (interlace_type != NULL)
{
*interlace_type = info_ptr->interlace_type;
test_interlace_type = *interlace_type;
}
png_check_IHDR (png_ptr, *width, *height, *bit_depth, *color_type,
test_interlace_type, test_compression_type, test_filter_type);
return (1);
}
#if defined(PNG_oFFs_SUPPORTED)