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Imported from libpng-1.0.12beta1.tar

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This commit is contained in:
Glenn Randers-Pehrson
2001-05-14 09:20:53 -05:00
parent 328353990f
commit e68f5a361b
55 changed files with 807 additions and 303 deletions
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24
pngrutil.c
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@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* libpng 1.0.11 - April 27, 2001
* libpng 1.0.12beta1 - May 14, 2001
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2001 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -339,7 +339,9 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->bit_depth = (png_byte)bit_depth;
png_ptr->interlaced = (png_byte)interlace_type;
png_ptr->color_type = (png_byte)color_type;
#if defined(PNG_MNG_FEATURES_SUPPORTED)
png_ptr->filter_type = (png_byte)filter_type;
#endif
/* find number of channels */
switch (png_ptr->color_type)
@@ -396,6 +398,13 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->mode |= PNG_HAVE_PLTE;
if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
{
png_warning(png_ptr,
"Ignoring PLTE chunk in grayscale PNG");
png_crc_finish(png_ptr, length);
return;
}
#if !defined(PNG_READ_OPT_PLTE_SUPPORTED)
if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
{
@@ -512,9 +521,7 @@ png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_error(png_ptr, "No image in file");
/* to quiet compiler warnings about unused info_ptr */
if (info_ptr == NULL)
return;
info_ptr = info_ptr; /* quiet compiler warnings about unused info_ptr */
}
png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND);
@@ -2083,8 +2090,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_crc_finish(png_ptr, skip);
#if !defined(PNG_READ_USER_CHUNKS_SUPPORTED)
if (info_ptr == NULL)
/* quiet compiler warnings about unused info_ptr */ ;
info_ptr = info_ptr; /* quiet compiler warnings about unused info_ptr */
#endif
}
@@ -2545,9 +2551,7 @@ png_do_read_interlace(png_structp png_ptr)
(png_uint_32)row_info->pixel_depth + 7) >> 3);
}
#if !defined(PNG_READ_PACKSWAP_SUPPORTED)
/* silence compiler warning */
if (transformations)
return;
transformations = transformations; /* silence compiler warning */
#endif
}
#endif /* !PNG_HAVE_ASSEMBLER_READ_INTERLACE */
@@ -2964,7 +2968,9 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
png_error(png_ptr, "This image requires a row greater than 64KB");
#endif
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, row_bytes);
#if defined(PNG_DEBUG) && defined(PNG_USE_PNGGCCRD)
png_ptr->row_buf_size = row_bytes;
#endif
#ifdef PNG_MAX_MALLOC_64K
if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L)