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[libpng15] Bump version to libpng-1.5.6beta02

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This commit is contained in:
Glenn Randers-Pehrson
2011-09-22 12:41:58 -05:00
parent 115020d985
commit bb5cb1476b
36 changed files with 855 additions and 879 deletions
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144
pngrutil.c
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@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* Last changed in libpng 1.5.5 [(PENDING RELEASE)]
* Last changed in libpng 1.5.6 [(PENDING RELEASE)]
* 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.)
@@ -165,14 +165,14 @@ png_read_chunk_header(png_structp png_ptr)
length = png_get_uint_31(png_ptr, buf);
/* Put the chunk name into png_ptr->chunk_name. */
png_memcpy(png_ptr->chunk_name, buf + 4, 4);
png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(buf+4);
png_debug2(0, "Reading %s chunk, length = %u",
png_ptr->chunk_name, length);
png_debug2(0, "Reading %lx chunk, length = %lu",
(unsigned long)png_ptr->chunk_name, (unsigned long)length);
/* Reset the crc and run it over the chunk name. */
png_reset_crc(png_ptr);
png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
png_calculate_crc(png_ptr, buf + 4, 4);
/* Check to see if chunk name is valid. */
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
@@ -218,10 +218,9 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
if (png_crc_error(png_ptr))
{
if (((png_ptr->chunk_name[0] & 0x20) && /* Ancillary */
!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) ||
(!(png_ptr->chunk_name[0] & 0x20) && /* Critical */
(png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)))
if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name) ?
!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) :
(png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE))
{
png_chunk_warning(png_ptr, "CRC error");
}
@@ -248,14 +247,14 @@ png_crc_error(png_structp png_ptr)
png_uint_32 crc;
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;
@@ -2641,16 +2640,14 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (png_ptr->mode & PNG_HAVE_IDAT)
{
PNG_IDAT;
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */
if (png_ptr->chunk_name != png_IDAT)
png_ptr->mode |= PNG_AFTER_IDAT;
}
if (!(png_ptr->chunk_name[0] & 0x20))
if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
{
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
&& png_ptr->read_user_chunk_fn == NULL
@@ -2668,21 +2665,20 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
)
{
#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';
/* TODO: this code is very close to the unknown handling in pngpread.c,
* maybe it can be put into a common utility routine?
* png_struct::unknown_chunk is just used as a temporary variable, along
* with the data into which the chunk is read. These can be eliminated.
*/
PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name);
png_ptr->unknown_chunk.size = (png_size_t)length;
if (length == 0)
@@ -2691,7 +2687,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
else
{
png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
png_crc_read(png_ptr, png_ptr->unknown_chunk.data, length);
}
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
@@ -2708,10 +2704,10 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (ret == 0)
{
if (!(png_ptr->chunk_name[0] & 0x20))
if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
{
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS)
#endif
png_chunk_error(png_ptr, "unknown critical chunk");
@@ -2748,16 +2744,26 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
* the chunk name itself is valid.
*/
#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
/* Bit hacking: the test for an invalid byte in the 4 byte chunk name is:
*
* ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
*/
void /* PRIVATE */
png_check_chunk_name(png_structp png_ptr, png_const_bytep chunk_name)
png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name)
{
int i;
png_debug(1, "in png_check_chunk_name");
if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) ||
isnonalpha(chunk_name[2]) || isnonalpha(chunk_name[3]))
for (i=1; i<=4; ++i)
{
png_chunk_error(png_ptr, "invalid chunk type");
int c = chunk_name & 0xff;
if (c < 65 || c > 122 || (c > 90 && c < 97))
png_chunk_error(png_ptr, "invalid chunk type");
chunk_name >>= 8;
}
}
@@ -2776,25 +2782,33 @@ png_check_chunk_name(png_structp png_ptr, png_const_bytep chunk_name)
void /* PRIVATE */
png_combine_row(png_structp png_ptr, png_bytep row, int mask)
{
int pixel_depth = png_ptr->transformed_pixel_depth;
png_debug(1, "in png_combine_row");
/* Added in 1.5.4: the row_info should match the information returned by any
* call to png_read_update_info at this point. Do not continue if we got
/* Added in 1.5.6: it should not be possible to enter this routine until at
* least one row has been read from the PNG data and transformed.
*/
if (pixel_depth == 0)
png_error(png_ptr, "internal row logic error");
/* Added in 1.5.4: the pixel depth should match the information returned by
* any call to png_read_update_info at this point. Do not continue if we got
* this wrong.
*/
if (png_ptr->info_rowbytes != 0 && png_ptr->info_rowbytes !=
PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width))
PNG_ROWBYTES(pixel_depth, png_ptr->width))
png_error(png_ptr, "internal row size calculation error");
if (mask == 0xff)
{
png_memcpy(row, png_ptr->row_buf + 1,
PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width));
PNG_ROWBYTES(pixel_depth, png_ptr->width));
}
else
{
switch (png_ptr->row_info.pixel_depth)
switch (pixel_depth)
{
case 1:
{
@@ -2971,7 +2985,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
{
png_bytep sp = png_ptr->row_buf + 1;
png_bytep dp = row;
png_size_t pixel_bytes = (png_ptr->row_info.pixel_depth >> 3);
png_size_t pixel_bytes = pixel_depth >> 3;
png_uint_32 i;
png_uint_32 row_width = png_ptr->width;
png_byte m = 0x80;
@@ -3000,15 +3014,12 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
#ifdef PNG_READ_INTERLACING_SUPPORTED
void /* PRIVATE */
png_do_read_interlace(png_structp png_ptr)
png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
png_uint_32 transformations /* Because these may affect the byte layout */)
{
png_row_infop row_info = &(png_ptr->row_info);
png_bytep row = png_ptr->row_buf + 1;
int pass = png_ptr->pass;
png_uint_32 transformations = png_ptr->transformations;
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Offset to next interlace block */
PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
static PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
png_debug(1, "in png_do_read_interlace");
if (row != NULL && row_info != NULL)
@@ -3241,12 +3252,13 @@ png_do_read_interlace(png_structp png_ptr)
}
#endif /* PNG_READ_INTERLACING_SUPPORTED */
/* 1.5.6: Changed to just take a png_row_info (not png_ptr) and to ignore bad
* adaptive filter bytes.
*/
void /* PRIVATE */
png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
png_const_bytep prev_row, int filter)
png_read_filter_row(png_row_infop row_info, png_bytep row,
png_const_bytep prev_row, int filter)
{
png_debug(1, "in png_read_filter_row");
png_debug2(2, "row = %u, filter = %d", png_ptr->row_number, filter);
switch (filter)
{
case PNG_FILTER_VALUE_NONE:
@@ -3363,8 +3375,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
break;
}
default:
png_error(png_ptr, "Ignoring bad adaptive filter type");
/*NOT REACHED */
/* NOT REACHED */
break;
}
}
@@ -3377,16 +3388,16 @@ png_read_finish_row(png_structp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
PNG_CONST 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 */
PNG_CONST 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 */
PNG_CONST 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 */
PNG_CONST 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_READ_INTERLACING_SUPPORTED */
png_debug(1, "in png_read_finish_row");
@@ -3433,7 +3444,6 @@ png_read_finish_row(png_structp png_ptr)
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
{
PNG_IDAT;
char extra;
int ret;
@@ -3448,7 +3458,7 @@ png_read_finish_row(png_structp png_ptr)
{
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");
}
@@ -3507,16 +3517,16 @@ png_read_start_row(png_structp png_ptr)
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
PNG_CONST 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 */
PNG_CONST 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 */
PNG_CONST 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 */
PNG_CONST 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 max_pixel_depth;
@@ -3676,14 +3686,20 @@ png_read_start_row(png_structp png_ptr)
defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
{
int user_pixel_depth = png_ptr->user_transform_depth*
int user_pixel_depth = png_ptr->user_transform_depth *
png_ptr->user_transform_channels;
if (user_pixel_depth > max_pixel_depth)
max_pixel_depth=user_pixel_depth;
max_pixel_depth = user_pixel_depth;
}
#endif
/* This value is stored in png_struct and double checked in the row read
* code.
*/
png_ptr->maximum_pixel_depth = (png_byte)max_pixel_depth;
png_ptr->transformed_pixel_depth = 0; /* calculated on demand */
/* Align the width on the next larger 8 pixels. Mainly used
* for interlacing
*/