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[libpng10] Imported from libpng-1.0.16.tar

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This commit is contained in:
Glenn Randers-Pehrson
2004-08-15 07:11:04 -05:00
parent 4fc3118b59
commit f47b4b1bf7
99 changed files with 3722 additions and 3976 deletions
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161
pngset.c
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@@ -1,9 +1,9 @@
/* pngset.c - storage of image information into info struct
*
* libpng 1.0.15 - October 3, 2002
* libpng 1.0.16 - August 15, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2002 Glenn Randers-Pehrson
* Copyright (c) 1998-2004 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.)
*
@@ -24,7 +24,7 @@ png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
if (png_ptr == NULL || info_ptr == NULL)
return;
png_memcpy(&(info_ptr->background), background, sizeof(png_color_16));
png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
info_ptr->valid |= PNG_INFO_bKGD;
}
#endif
@@ -100,10 +100,14 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
"Ignoring attempt to set negative chromaticity value");
return;
}
if (white_x > (double) PNG_MAX_UINT || white_y > (double) PNG_MAX_UINT ||
red_x > (double) PNG_MAX_UINT || red_y > (double) PNG_MAX_UINT ||
green_x > (double) PNG_MAX_UINT || green_y > (double) PNG_MAX_UINT ||
blue_x > (double) PNG_MAX_UINT || blue_y > (double) PNG_MAX_UINT)
if (white_x > (double) PNG_UINT_31_MAX ||
white_y > (double) PNG_UINT_31_MAX ||
red_x > (double) PNG_UINT_31_MAX ||
red_y > (double) PNG_UINT_31_MAX ||
green_x > (double) PNG_UINT_31_MAX ||
green_y > (double) PNG_UINT_31_MAX ||
blue_x > (double) PNG_UINT_31_MAX ||
blue_y > (double) PNG_UINT_31_MAX)
{
png_warning(png_ptr,
"Ignoring attempt to set chromaticity value exceeding 21474.83");
@@ -169,10 +173,10 @@ png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
if (png_ptr == NULL || info_ptr == NULL)
return;
if (int_gamma > (png_fixed_point) PNG_MAX_UINT)
if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Limiting gamma to 21474.83");
gamma=PNG_MAX_UINT;
gamma=PNG_UINT_31_MAX;
}
else
{
@@ -217,7 +221,7 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
#endif
/* Changed from info->num_palette to 256 in version 1.2.1 */
png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
(png_uint_32)(256 * sizeof (png_uint_16)));
(png_uint_32)(256 * png_sizeof (png_uint_16)));
if (png_ptr->hist == NULL)
{
png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
@@ -243,7 +247,6 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
int color_type, int interlace_type, int compression_type,
int filter_type)
{
int rowbytes_per_pixel;
png_debug1(1, "in %s storage function\n", "IHDR");
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -251,8 +254,22 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
/* check for width and height valid values */
if (width == 0 || height == 0)
png_error(png_ptr, "Image width or height is zero in IHDR");
if (width > PNG_MAX_UINT || height > PNG_MAX_UINT)
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
png_error(png_ptr, "image size exceeds user limits in IHDR");
#else
if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
png_error(png_ptr, "image size exceeds user limits in IHDR");
#endif
if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image size in IHDR");
if ( 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 is too large for libpng to process pixels");
/* check other values */
if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
@@ -320,16 +337,16 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
info_ptr->channels++;
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
/* check for overflow */
rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
if ( width > PNG_MAX_UINT/rowbytes_per_pixel - 64)
{
png_warning(png_ptr,
"Width too large to process image data; rowbytes will overflow.");
/* check for potential overflow */
if ( 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 */
info_ptr->rowbytes = (png_size_t)0;
}
else
info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3;
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
}
#if defined(PNG_oFFs_SUPPORTED)
@@ -388,7 +405,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
(png_uint_32)((nparams + 1) * sizeof(png_charp)));
(png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
if (info_ptr->pcal_params == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL params.");
@@ -449,12 +466,21 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
length = png_strlen(swidth) + 1;
png_debug1(3, "allocating unit for info (%d bytes)\n", length);
info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length);
info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
if (info_ptr->scal_s_width == NULL)
{
png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
}
png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
length = png_strlen(sheight) + 1;
png_debug1(3, "allocating unit for info (%d bytes)\n", length);
info_ptr->scal_s_height = (png_charp)png_malloc(png_ptr, length);
info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
if (info_ptr->scal_s_height == NULL)
{
png_free (png_ptr, info_ptr->scal_s_width);
png_warning(png_ptr, "Memory allocation failed while processing sCAL.");
}
png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
info_ptr->valid |= PNG_INFO_sCAL;
@@ -499,13 +525,13 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
#ifdef PNG_FREE_ME_SUPPORTED
png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
#endif
/* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
in case of an invalid PNG file that has too-large sample values. */
png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)256,
sizeof (png_color));
if (png_ptr->palette == NULL)
png_error(png_ptr, "Unable to malloc palette");
png_memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
png_ptr->palette = (png_colorp)png_malloc(png_ptr,
256 * png_sizeof(png_color));
png_memset(png_ptr->palette, 0, 256 * png_sizeof(png_color));
png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color));
info_ptr->palette = png_ptr->palette;
info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
@@ -527,7 +553,7 @@ png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL)
return;
png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8));
png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8));
info_ptr->valid |= PNG_INFO_sBIT;
}
#endif
@@ -628,9 +654,20 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
return;
new_iccp_name = (png_charp)png_malloc(png_ptr, png_strlen(name)+1);
new_iccp_name = (png_charp)png_malloc_warn(png_ptr, png_strlen(name)+1);
if (new_iccp_name == NULL)
{
png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
return;
}
png_strcpy(new_iccp_name, name);
new_iccp_profile = (png_charp)png_malloc(png_ptr, proflen);
new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
if (new_iccp_profile == NULL)
{
png_free (png_ptr, new_iccp_name);
png_warning(png_ptr, "Insufficient memory to process iCCP profile.");
return;
}
png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
@@ -685,14 +722,14 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
info_ptr->max_text = info_ptr->num_text + num_text + 8;
old_text = info_ptr->text;
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_uint_32)(info_ptr->max_text * sizeof (png_text)));
(png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
if (info_ptr->text == NULL)
{
png_free(png_ptr, old_text);
return(1);
}
png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
sizeof(png_text)));
png_sizeof(png_text)));
png_free(png_ptr, old_text);
}
else
@@ -700,7 +737,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
info_ptr->max_text = num_text + 8;
info_ptr->num_text = 0;
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_uint_32)(info_ptr->max_text * sizeof (png_text)));
(png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
if (info_ptr->text == NULL)
return(1);
#ifdef PNG_FREE_ME_SUPPORTED
@@ -829,7 +866,7 @@ png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
(png_ptr->mode & PNG_WROTE_tIME))
return;
png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time));
info_ptr->valid |= PNG_INFO_tIME;
}
#endif
@@ -867,7 +904,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
if (trans_values != NULL)
{
png_memcpy(&(info_ptr->trans_values), trans_values,
sizeof(png_color_16));
png_sizeof(png_color_16));
if (num_trans == 0)
num_trans = 1;
}
@@ -885,7 +922,7 @@ png_set_sPLT(png_structp png_ptr,
int i;
np = (png_sPLT_tp)png_malloc_warn(png_ptr,
(info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t));
(info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t));
if (np == NULL)
{
png_warning(png_ptr, "No memory for sPLT palettes.");
@@ -893,7 +930,7 @@ png_set_sPLT(png_structp png_ptr,
}
png_memcpy(np, info_ptr->splt_palettes,
info_ptr->splt_palettes_num * sizeof(png_sPLT_t));
info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes=NULL;
@@ -904,11 +941,13 @@ png_set_sPLT(png_structp png_ptr,
to->name = (png_charp)png_malloc(png_ptr,
png_strlen(from->name) + 1);
/* TODO: use png_malloc_warn */
png_strcpy(to->name, from->name);
to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
from->nentries * sizeof(png_sPLT_t));
from->nentries * png_sizeof(png_sPLT_t));
/* TODO: use png_malloc_warn */
png_memcpy(to->entries, from->entries,
from->nentries * sizeof(png_sPLT_t));
from->nentries * png_sizeof(png_sPLT_t));
to->nentries = from->nentries;
to->depth = from->depth;
}
@@ -935,7 +974,7 @@ png_set_unknown_chunks(png_structp png_ptr,
np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
(info_ptr->unknown_chunks_num + num_unknowns) *
sizeof(png_unknown_chunk));
png_sizeof(png_unknown_chunk));
if (np == NULL)
{
png_warning(png_ptr, "Out of memory while processing unknown chunk.");
@@ -943,7 +982,7 @@ png_set_unknown_chunks(png_structp png_ptr,
}
png_memcpy(np, info_ptr->unknown_chunks,
info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk));
info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
png_free(png_ptr, info_ptr->unknown_chunks);
info_ptr->unknown_chunks=NULL;
@@ -952,17 +991,19 @@ png_set_unknown_chunks(png_structp png_ptr,
png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
png_unknown_chunkp from = unknowns + i;
png_strcpy((png_charp)to->name, (png_charp)from->name);
to->data = (png_bytep)png_malloc(png_ptr, from->size);
png_strncpy((png_charp)to->name, (png_charp)from->name, 5);
to->data = (png_bytep)png_malloc_warn(png_ptr, from->size);
if (to->data == NULL)
png_warning(png_ptr, "Out of memory while processing unknown chunk.");
{
png_warning(png_ptr, "Out of memory processing unknown chunk.");
}
else
{
png_memcpy(to->data, from->data, from->size);
to->size = from->size;
png_memcpy(to->data, from->data, from->size);
to->size = from->size;
/* note our location in the read or write sequence */
to->location = (png_byte)(png_ptr->mode & 0xff);
/* note our location in the read or write sequence */
to->location = (png_byte)(png_ptr->mode & 0xff);
}
}
@@ -1020,12 +1061,12 @@ png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
int i, old_num_chunks;
if (num_chunks == 0)
{
if(keep == HANDLE_CHUNK_ALWAYS || keep == HANDLE_CHUNK_IF_SAFE)
if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
else
png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
if(keep == HANDLE_CHUNK_ALWAYS)
if(keep == PNG_HANDLE_CHUNK_ALWAYS)
png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
else
png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
@@ -1083,6 +1124,7 @@ png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
}
#endif
#ifdef PNG_WRITE_SUPPORTED
void PNGAPI
png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
{
@@ -1093,6 +1135,7 @@ png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}
#endif
void PNGAPI
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
@@ -1157,4 +1200,20 @@ png_set_mmx_thresholds (png_structp png_ptr,
png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* this function was added to libpng 1.2.6 */
void PNGAPI
png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
png_uint_32 user_height_max)
{
/* Images with dimensions larger than these limits will be
* rejected by png_set_IHDR(). To accept any PNG datastream
* regardless of dimensions, set both limits to 0x7ffffffL.
*/
png_ptr->user_width_max = user_width_max;
png_ptr->user_height_max = user_height_max;
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
#endif /* ?PNG_1_0_X */