--- a/src/3rdparty/libpng/pngrutil.c Wed Jun 23 19:07:03 2010 +0300
+++ b/src/3rdparty/libpng/pngrutil.c Tue Jul 06 15:10:48 2010 +0300
@@ -1,8 +1,8 @@
/* pngrutil.c - utilities to read a PNG file
*
- * Last changed in libpng 1.2.38 [July 16, 2009]
- * Copyright (c) 1998-2009 Glenn Randers-Pehrson
+ * Last changed in libpng 1.4.0 [January 3, 2010]
+ * Copyright (c) 1998-2010 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.)
*
@@ -14,57 +14,21 @@
* libpng itself during the course of reading an image.
*/
-#define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
#include "png.h"
-#if defined(PNG_READ_SUPPORTED)
-
-#if defined(_WIN32_WCE) && (_WIN32_WCE<0x500)
-# define WIN32_WCE_OLD
-#endif
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-# if defined(WIN32_WCE_OLD)
-/* The strtod() function is not supported on WindowsCE */
-__inline double png_strtod(png_structp png_ptr, PNG_CONST char *nptr, char **endptr)
-{
- double result = 0;
- int len;
- wchar_t *str, *end;
-
- len = MultiByteToWideChar(CP_ACP, 0, nptr, -1, NULL, 0);
- str = (wchar_t *)png_malloc(png_ptr, len * png_sizeof(wchar_t));
- if ( NULL != str )
- {
- MultiByteToWideChar(CP_ACP, 0, nptr, -1, str, len);
- result = wcstod(str, &end);
- len = WideCharToMultiByte(CP_ACP, 0, end, -1, NULL, 0, NULL, NULL);
- *endptr = (char *)nptr + (png_strlen(nptr) - len + 1);
- png_free(png_ptr, str);
- }
- return result;
-}
-# else
+#ifdef PNG_READ_SUPPORTED
+#include "pngpriv.h"
+
# define png_strtod(p,a,b) strtod(a,b)
-# endif
-#endif
-
png_uint_32 PNGAPI
png_get_uint_31(png_structp png_ptr, png_bytep buf)
{
-#ifdef PNG_READ_BIG_ENDIAN_SUPPORTED
png_uint_32 i = png_get_uint_32(buf);
-#else
- /* Avoid an extra function call by inlining the result. */
- png_uint_32 i = ((png_uint_32)(*buf) << 24) +
- ((png_uint_32)(*(buf + 1)) << 16) +
- ((png_uint_32)(*(buf + 2)) << 8) +
- (png_uint_32)(*(buf + 3));
-#endif
if (i > PNG_UINT_31_MAX)
- png_error(png_ptr, "PNG unsigned integer out of range.");
+ png_error(png_ptr, "PNG unsigned integer out of range");
return (i);
}
-#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
+#ifndef PNG_USE_READ_MACROS
/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
png_uint_32 PNGAPI
png_get_uint_32(png_bytep buf)
@@ -101,7 +65,7 @@
return (i);
}
-#endif /* PNG_READ_BIG_ENDIAN_SUPPORTED */
+#endif /* PNG_USE_READ_MACROS */
/* Read the chunk header (length + type name).
* Put the type name into png_ptr->chunk_name, and return the length.
@@ -112,6 +76,13 @@
png_byte buf[8];
png_uint_32 length;
+#ifdef PNG_IO_STATE_SUPPORTED
+ /* Inform the I/O callback that the chunk header is being read.
+ * PNG_IO_CHUNK_HDR requires a single I/O call.
+ */
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR;
+#endif
+
/* Read the length and the chunk name */
png_read_data(png_ptr, buf, 8);
length = png_get_uint_31(png_ptr, buf);
@@ -129,6 +100,13 @@
/* Check to see if chunk name is valid */
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
+#ifdef PNG_IO_STATE_SUPPORTED
+ /* Inform the I/O callback that chunk data will (possibly) be read.
+ * PNG_IO_CHUNK_DATA does NOT require a specific number of I/O calls.
+ */
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA;
+#endif
+
return length;
}
@@ -173,7 +151,8 @@
}
else
{
- png_chunk_error(png_ptr, "CRC error");
+ png_chunk_benign_error(png_ptr, "CRC error");
+ return (0);
}
return (1);
}
@@ -203,6 +182,12 @@
need_crc = 0;
}
+#ifdef PNG_IO_STATE_SUPPORTED
+ /* Inform the I/O callback that the chunk CRC is being read */
+ /* PNG_IO_CHUNK_CRC requires the I/O to be done at once */
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC;
+#endif
+
png_read_data(png_ptr, crc_bytes, 4);
if (need_crc)
@@ -228,7 +213,7 @@
png_size_t chunklength,
png_size_t prefix_size, png_size_t *newlength)
{
- static PNG_CONST char msg[] = "Error decoding compressed text";
+ static PNG_CONST char msg[] = "Error decoding compressed chunk";
png_charp text;
png_size_t text_size;
@@ -290,7 +275,7 @@
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
png_error(png_ptr,
- "Not enough memory to decompress chunk.");
+ "Not enough memory to decompress chunk");
}
png_memcpy(text + prefix_size, png_ptr->zbuf,
text_size - prefix_size);
@@ -302,16 +287,30 @@
png_charp tmp;
tmp = text;
- text = (png_charp)png_malloc_warn(png_ptr,
- (png_uint_32)(text_size +
- png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if ((png_ptr->user_chunk_cache_max != 0) &&
+ (--png_ptr->user_chunk_cache_max == 0))
+ {
+ png_warning(png_ptr, "No space in chunk cache");
+ text = NULL;
+ }
+
+ else
+ {
+#endif
+ text = (png_charp)png_malloc_warn(png_ptr,
+ (png_size_t)(text_size +
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ }
+#endif
if (text == NULL)
{
png_free(png_ptr, tmp);
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
png_error(png_ptr,
- "Not enough memory to decompress chunk..");
+ "Not enough memory to decompress chunk");
}
png_memcpy(text, tmp, text_size);
png_free(png_ptr, tmp);
@@ -331,7 +330,7 @@
}
if (ret != Z_STREAM_END)
{
-#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
+#ifdef PNG_STDIO_SUPPORTED
char umsg[52];
if (ret == Z_BUF_ERROR)
@@ -362,7 +361,7 @@
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
- png_error(png_ptr, "Not enough memory for text.");
+ png_error(png_ptr, "Not enough memory for text");
}
png_memcpy(text, png_ptr->chunkdata, prefix_size);
}
@@ -378,7 +377,7 @@
}
else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */
{
-#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
+#ifdef PNG_STDIO_SUPPORTED
char umsg[50];
png_snprintf(umsg, 50, "Unknown zTXt compression type %d", comp_type);
@@ -430,7 +429,7 @@
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)
+#ifdef PNG_MNG_FEATURES_SUPPORTED
png_ptr->filter_type = (png_byte)filter_type;
#endif
png_ptr->compression_type = (png_byte)compression_type;
@@ -473,7 +472,7 @@
{
png_color palette[PNG_MAX_PALETTE_LENGTH];
int num, i;
-#ifndef PNG_NO_POINTER_INDEXING
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
png_colorp pal_ptr;
#endif
@@ -501,7 +500,7 @@
png_crc_finish(png_ptr, length);
return;
}
-#if !defined(PNG_READ_OPT_PLTE_SUPPORTED)
+#ifndef PNG_READ_OPT_PLTE_SUPPORTED
if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
{
png_crc_finish(png_ptr, length);
@@ -526,7 +525,7 @@
num = (int)length / 3;
-#ifndef PNG_NO_POINTER_INDEXING
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++)
{
png_byte buf[3];
@@ -554,13 +553,13 @@
* have an RGB image, the PLTE can be considered ancillary, so
* we will act as though it is.
*/
-#if !defined(PNG_READ_OPT_PLTE_SUPPORTED)
+#ifndef PNG_READ_OPT_PLTE_SUPPORTED
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
#endif
{
png_crc_finish(png_ptr, 0);
}
-#if !defined(PNG_READ_OPT_PLTE_SUPPORTED)
+#ifndef PNG_READ_OPT_PLTE_SUPPORTED
else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */
{
/* If we don't want to use the data from an ancillary chunk,
@@ -571,7 +570,7 @@
{
if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)
{
- png_chunk_error(png_ptr, "CRC error");
+ png_chunk_benign_error(png_ptr, "CRC error");
}
else
{
@@ -589,7 +588,7 @@
png_set_PLTE(png_ptr, info_ptr, palette, num);
-#if defined(PNG_READ_tRNS_SUPPORTED)
+#ifdef PNG_READ_tRNS_SUPPORTED
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
@@ -631,7 +630,7 @@
info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */
}
-#if defined(PNG_READ_gAMA_SUPPORTED)
+#ifdef PNG_READ_gAMA_SUPPORTED
void /* PRIVATE */
png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -656,7 +655,7 @@
png_warning(png_ptr, "Out of place gAMA chunk");
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
-#if defined(PNG_READ_sRGB_SUPPORTED)
+#ifdef PNG_READ_sRGB_SUPPORTED
&& !(info_ptr->valid & PNG_INFO_sRGB)
#endif
)
@@ -686,13 +685,13 @@
return;
}
-#if defined(PNG_READ_sRGB_SUPPORTED)
+#ifdef PNG_READ_sRGB_SUPPORTED
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
if (PNG_OUT_OF_RANGE(igamma, 45500L, 500))
{
png_warning(png_ptr,
"Ignoring incorrect gAMA value when sRGB is also present");
-#ifndef PNG_NO_CONSOLE_IO
+#ifdef PNG_CONSOLE_IO_SUPPORTED
fprintf(stderr, "gamma = (%d/100000)", (int)igamma);
#endif
return;
@@ -712,7 +711,7 @@
}
#endif
-#if defined(PNG_READ_sBIT_SUPPORTED)
+#ifdef PNG_READ_sBIT_SUPPORTED
void /* PRIVATE */
png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -778,7 +777,7 @@
}
#endif
-#if defined(PNG_READ_cHRM_SUPPORTED)
+#ifdef PNG_READ_cHRM_SUPPORTED
void /* PRIVATE */
png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -806,7 +805,7 @@
png_warning(png_ptr, "Missing PLTE before cHRM");
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)
-#if defined(PNG_READ_sRGB_SUPPORTED)
+#ifdef PNG_READ_sRGB_SUPPORTED
&& !(info_ptr->valid & PNG_INFO_sRGB)
#endif
)
@@ -858,7 +857,7 @@
blue_y = (float)int_y_blue / (float)100000.0;
#endif
-#if defined(PNG_READ_sRGB_SUPPORTED)
+#ifdef PNG_READ_sRGB_SUPPORTED
if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB))
{
if (PNG_OUT_OF_RANGE(int_x_white, 31270, 1000) ||
@@ -872,7 +871,7 @@
{
png_warning(png_ptr,
"Ignoring incorrect cHRM value when sRGB is also present");
-#ifndef PNG_NO_CONSOLE_IO
+#ifdef PNG_CONSOLE_IO_SUPPORTED
#ifdef PNG_FLOATING_POINT_SUPPORTED
fprintf(stderr, "wx=%f, wy=%f, rx=%f, ry=%f\n",
white_x, white_y, red_x, red_y);
@@ -884,7 +883,7 @@
fprintf(stderr, "gx=%ld, gy=%ld, bx=%ld, by=%ld\n",
int_x_green, int_y_green, int_x_blue, int_y_blue);
#endif
-#endif /* PNG_NO_CONSOLE_IO */
+#endif /* PNG_CONSOLE_IO_SUPPORTED */
}
return;
}
@@ -902,7 +901,7 @@
}
#endif
-#if defined(PNG_READ_sRGB_SUPPORTED)
+#ifdef PNG_READ_sRGB_SUPPORTED
void /* PRIVATE */
png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -964,7 +963,7 @@
{
png_warning(png_ptr,
"Ignoring incorrect gAMA value when sRGB is also present");
-#ifndef PNG_NO_CONSOLE_IO
+#ifdef PNG_CONSOLE_IO_SUPPORTED
# ifdef PNG_FIXED_POINT_SUPPORTED
fprintf(stderr, "incorrect gamma=(%d/100000)\n",
(int)png_ptr->int_gamma);
@@ -1000,7 +999,7 @@
}
#endif /* PNG_READ_sRGB_SUPPORTED */
-#if defined(PNG_READ_iCCP_SUPPORTED)
+#ifdef PNG_READ_iCCP_SUPPORTED
void /* PRIVATE */
png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* Note: this does not properly handle chunks that are > 64K under DOS */
@@ -1109,7 +1108,7 @@
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "Ignoring truncated iCCP profile.");
+ png_warning(png_ptr, "Ignoring truncated iCCP profile");
return;
}
@@ -1120,14 +1119,14 @@
}
#endif /* PNG_READ_iCCP_SUPPORTED */
-#if defined(PNG_READ_sPLT_SUPPORTED)
+#ifdef PNG_READ_sPLT_SUPPORTED
void /* PRIVATE */
png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* Note: this does not properly handle chunks that are > 64K under DOS */
{
png_bytep entry_start;
png_sPLT_t new_palette;
-#ifdef PNG_NO_POINTER_INDEXING
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
png_sPLT_entryp pp;
#endif
int data_length, entry_size, i;
@@ -1136,6 +1135,23 @@
png_debug(1, "in png_handle_sPLT");
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for sPLT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before sPLT");
@@ -1210,10 +1226,10 @@
return;
}
-#ifndef PNG_NO_POINTER_INDEXING
+#ifdef PNG_POINTER_INDEXING_SUPPORTED
for (i = 0; i < new_palette.nentries; i++)
{
- png_sPLT_entryp pp = new_palette.entries + i;
+ pp = new_palette.entries + i;
if (new_palette.depth == 8)
{
@@ -1265,7 +1281,7 @@
}
#endif /* PNG_READ_sPLT_SUPPORTED */
-#if defined(PNG_READ_tRNS_SUPPORTED)
+#ifdef PNG_READ_tRNS_SUPPORTED
void /* PRIVATE */
png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1301,7 +1317,7 @@
png_crc_read(png_ptr, buf, 2);
png_ptr->num_trans = 1;
- png_ptr->trans_values.gray = png_get_uint_16(buf);
+ png_ptr->trans_color.gray = png_get_uint_16(buf);
}
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
{
@@ -1315,9 +1331,9 @@
}
png_crc_read(png_ptr, buf, (png_size_t)length);
png_ptr->num_trans = 1;
- png_ptr->trans_values.red = png_get_uint_16(buf);
- png_ptr->trans_values.green = png_get_uint_16(buf + 2);
- png_ptr->trans_values.blue = png_get_uint_16(buf + 4);
+ png_ptr->trans_color.red = png_get_uint_16(buf);
+ png_ptr->trans_color.green = png_get_uint_16(buf + 2);
+ png_ptr->trans_color.blue = png_get_uint_16(buf + 4);
}
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
@@ -1356,11 +1372,11 @@
}
png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans,
- &(png_ptr->trans_values));
+ &(png_ptr->trans_color));
}
#endif
-#if defined(PNG_READ_bKGD_SUPPORTED)
+#ifdef PNG_READ_bKGD_SUPPORTED
void /* PRIVATE */
png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1449,7 +1465,7 @@
}
#endif
-#if defined(PNG_READ_hIST_SUPPORTED)
+#ifdef PNG_READ_hIST_SUPPORTED
void /* PRIVATE */
png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1503,7 +1519,7 @@
}
#endif
-#if defined(PNG_READ_pHYs_SUPPORTED)
+#ifdef PNG_READ_pHYs_SUPPORTED
void /* PRIVATE */
png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1546,7 +1562,7 @@
}
#endif
-#if defined(PNG_READ_oFFs_SUPPORTED)
+#ifdef PNG_READ_oFFs_SUPPORTED
void /* PRIVATE */
png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1589,7 +1605,7 @@
}
#endif
-#if defined(PNG_READ_pCAL_SUPPORTED)
+#ifdef PNG_READ_pCAL_SUPPORTED
/* Read the pCAL chunk (described in the PNG Extensions document) */
void /* PRIVATE */
png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
@@ -1624,7 +1640,7 @@
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
if (png_ptr->chunkdata == NULL)
{
- png_warning(png_ptr, "No memory for pCAL purpose.");
+ png_warning(png_ptr, "No memory for pCAL purpose");
return;
}
slength = (png_size_t)length;
@@ -1685,12 +1701,12 @@
png_debug(3, "Allocating pCAL parameters array");
params = (png_charpp)png_malloc_warn(png_ptr,
- (png_uint_32)(nparams * png_sizeof(png_charp))) ;
+ (png_size_t)(nparams * png_sizeof(png_charp)));
if (params == NULL)
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "No memory for pCAL params.");
+ png_warning(png_ptr, "No memory for pCAL params");
return;
}
@@ -1723,7 +1739,7 @@
}
#endif
-#if defined(PNG_READ_sCAL_SUPPORTED)
+#ifdef PNG_READ_sCAL_SUPPORTED
/* Read the sCAL chunk */
void /* PRIVATE */
png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
@@ -1793,7 +1809,7 @@
png_warning(png_ptr, "Out of memory while processing sCAL chunk width");
return;
}
- png_memcpy(swidth, ep, (png_size_t)png_strlen(ep));
+ png_memcpy(swidth, ep, png_strlen(ep));
#endif
#endif
@@ -1828,7 +1844,7 @@
png_warning(png_ptr, "Out of memory while processing sCAL chunk height");
return;
}
- png_memcpy(sheight, ep, (png_size_t)png_strlen(ep));
+ png_memcpy(sheight, ep, png_strlen(ep));
#endif
#endif
@@ -1866,7 +1882,7 @@
}
#endif
-#if defined(PNG_READ_tIME_SUPPORTED)
+#ifdef PNG_READ_tIME_SUPPORTED
void /* PRIVATE */
png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1909,7 +1925,7 @@
}
#endif
-#if defined(PNG_READ_tEXt_SUPPORTED)
+#ifdef PNG_READ_tEXt_SUPPORTED
/* Note: this does not properly handle chunks that are > 64K under DOS */
void /* PRIVATE */
png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
@@ -1923,6 +1939,22 @@
png_debug(1, "in png_handle_tEXt");
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for tEXt");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before tEXt");
@@ -1944,7 +1976,7 @@
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
if (png_ptr->chunkdata == NULL)
{
- png_warning(png_ptr, "No memory to process text chunk.");
+ png_warning(png_ptr, "No memory to process text chunk");
return;
}
slength = (png_size_t)length;
@@ -1968,10 +2000,10 @@
text++;
text_ptr = (png_textp)png_malloc_warn(png_ptr,
- (png_uint_32)png_sizeof(png_text));
+ png_sizeof(png_text));
if (text_ptr == NULL)
{
- png_warning(png_ptr, "Not enough memory to process text chunk.");
+ png_warning(png_ptr, "Not enough memory to process text chunk");
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
return;
@@ -1992,11 +2024,11 @@
png_ptr->chunkdata = NULL;
png_free(png_ptr, text_ptr);
if (ret)
- png_warning(png_ptr, "Insufficient memory to process text chunk.");
+ png_warning(png_ptr, "Insufficient memory to process text chunk");
}
#endif
-#if defined(PNG_READ_zTXt_SUPPORTED)
+#ifdef PNG_READ_zTXt_SUPPORTED
/* Note: this does not correctly handle chunks that are > 64K under DOS */
void /* PRIVATE */
png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
@@ -2009,6 +2041,22 @@
png_debug(1, "in png_handle_zTXt");
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for zTXt");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before zTXt");
@@ -2031,7 +2079,7 @@
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
if (png_ptr->chunkdata == NULL)
{
- png_warning(png_ptr, "Out of memory processing zTXt chunk.");
+ png_warning(png_ptr, "Out of memory processing zTXt chunk");
return;
}
slength = (png_size_t)length;
@@ -2072,10 +2120,10 @@
(png_size_t)length, prefix_len, &data_len);
text_ptr = (png_textp)png_malloc_warn(png_ptr,
- (png_uint_32)png_sizeof(png_text));
+ png_sizeof(png_text));
if (text_ptr == NULL)
{
- png_warning(png_ptr, "Not enough memory to process zTXt chunk.");
+ png_warning(png_ptr, "Not enough memory to process zTXt chunk");
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
return;
@@ -2096,11 +2144,11 @@
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
if (ret)
- png_error(png_ptr, "Insufficient memory to store zTXt chunk.");
+ png_error(png_ptr, "Insufficient memory to store zTXt chunk");
}
#endif
-#if defined(PNG_READ_iTXt_SUPPORTED)
+#ifdef PNG_READ_iTXt_SUPPORTED
/* Note: this does not correctly handle chunks that are > 64K under DOS */
void /* PRIVATE */
png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
@@ -2114,6 +2162,22 @@
png_debug(1, "in png_handle_iTXt");
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for iTXt");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before iTXt");
@@ -2136,7 +2200,7 @@
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
if (png_ptr->chunkdata == NULL)
{
- png_warning(png_ptr, "No memory to process iTXt chunk.");
+ png_warning(png_ptr, "No memory to process iTXt chunk");
return;
}
slength = (png_size_t)length;
@@ -2204,10 +2268,10 @@
else
data_len = png_strlen(png_ptr->chunkdata + prefix_len);
text_ptr = (png_textp)png_malloc_warn(png_ptr,
- (png_uint_32)png_sizeof(png_text));
+ png_sizeof(png_text));
if (text_ptr == NULL)
{
- png_warning(png_ptr, "Not enough memory to process iTXt chunk.");
+ png_warning(png_ptr, "Not enough memory to process iTXt chunk");
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
return;
@@ -2226,7 +2290,7 @@
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
if (ret)
- png_error(png_ptr, "Insufficient memory to store iTXt chunk.");
+ png_error(png_ptr, "Insufficient memory to store iTXt chunk");
}
#endif
@@ -2242,22 +2306,36 @@
png_debug(1, "in png_handle_unknown");
+#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (png_ptr->user_chunk_cache_max != 0)
+ {
+ if (png_ptr->user_chunk_cache_max == 1)
+ {
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ if (--png_ptr->user_chunk_cache_max == 1)
+ {
+ png_warning(png_ptr, "No space in chunk cache for unknown chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ }
+#endif
if (png_ptr->mode & PNG_HAVE_IDAT)
{
-#ifdef PNG_USE_LOCAL_ARRAYS
- PNG_CONST PNG_IDAT;
-#endif
+ PNG_IDAT;
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */
png_ptr->mode |= PNG_AFTER_IDAT;
}
if (!(png_ptr->chunk_name[0] & 0x20))
{
-#if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS
-#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
&& png_ptr->read_user_chunk_fn == NULL
#endif
)
@@ -2265,9 +2343,9 @@
png_chunk_error(png_ptr, "unknown critical chunk");
}
-#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
-#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
|| (png_ptr->read_user_chunk_fn != NULL)
#endif
)
@@ -2292,7 +2370,7 @@
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);
}
-#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
if (png_ptr->read_user_chunk_fn != NULL)
{
/* Callback to user unknown chunk handler */
@@ -2304,7 +2382,7 @@
if (ret == 0)
{
if (!(png_ptr->chunk_name[0] & 0x20))
-#if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS)
#endif
@@ -2325,7 +2403,7 @@
png_crc_finish(png_ptr, skip);
-#if !defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+#ifndef PNG_READ_USER_CHUNKS_SUPPORTED
info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */
#endif
}
@@ -2383,7 +2461,7 @@
png_uint_32 i;
png_uint_32 row_width = png_ptr->width;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
{
s_start = 0;
@@ -2438,7 +2516,7 @@
png_uint_32 row_width = png_ptr->width;
int value;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
{
s_start = 0;
@@ -2490,7 +2568,7 @@
png_uint_32 row_width = png_ptr->width;
int value;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
{
s_start = 0;
@@ -2573,11 +2651,9 @@
png_bytep row = png_ptr->row_buf + 1;
int pass = png_ptr->pass;
png_uint_32 transformations = png_ptr->transformations;
-#ifdef PNG_USE_LOCAL_ARRAYS
/* 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};
-#endif
png_debug(1, "in png_do_read_interlace");
if (row != NULL && row_info != NULL)
@@ -2599,7 +2675,7 @@
png_uint_32 i;
int j;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (transformations & PNG_PACKSWAP)
{
sshift = (int)((row_info->width + 7) & 0x07);
@@ -2652,7 +2728,7 @@
int jstop = png_pass_inc[pass];
png_uint_32 i;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (transformations & PNG_PACKSWAP)
{
sshift = (int)(((row_info->width + 3) & 0x03) << 1);
@@ -2708,7 +2784,7 @@
png_uint_32 i;
int jstop = png_pass_inc[pass];
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
+#ifdef PNG_READ_PACKSWAP_SUPPORTED
if (transformations & PNG_PACKSWAP)
{
sshift = (int)(((row_info->width + 1) & 0x01) << 2);
@@ -2782,7 +2858,7 @@
row_info->width = final_width;
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width);
}
-#if !defined(PNG_READ_PACKSWAP_SUPPORTED)
+#ifndef PNG_READ_PACKSWAP_SUPPORTED
transformations = transformations; /* Silence compiler warning */
#endif
}
@@ -2911,11 +2987,10 @@
}
}
-#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
+#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
void /* PRIVATE */
png_read_finish_row(png_structp png_ptr)
{
-#ifdef PNG_USE_LOCAL_ARRAYS
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
@@ -2931,7 +3006,6 @@
/* Offset to next interlace block in the y direction */
PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif /* PNG_READ_INTERLACING_SUPPORTED */
-#endif
png_debug(1, "in png_read_finish_row");
png_ptr->row_number++;
@@ -2942,7 +3016,7 @@
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
- png_memset_check(png_ptr, png_ptr->prev_row, 0,
+ png_memset(png_ptr->prev_row, 0,
png_ptr->rowbytes + 1);
do
{
@@ -2977,9 +3051,7 @@
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
{
-#ifdef PNG_USE_LOCAL_ARRAYS
- PNG_CONST PNG_IDAT;
-#endif
+ PNG_IDAT;
char extra;
int ret;
@@ -3026,7 +3098,7 @@
if (!(png_ptr->zstream.avail_out))
{
- png_warning(png_ptr, "Extra compressed data.");
+ png_warning(png_ptr, "Extra compressed data");
png_ptr->mode |= PNG_AFTER_IDAT;
png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
break;
@@ -3043,12 +3115,11 @@
png_ptr->mode |= PNG_AFTER_IDAT;
}
-#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
+#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
void /* PRIVATE */
png_read_start_row(png_structp png_ptr)
{
-#ifdef PNG_USE_LOCAL_ARRAYS
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
@@ -3064,7 +3135,6 @@
/* Offset to next interlace block in the y direction */
PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
-#endif
int max_pixel_depth;
png_size_t row_bytes;
@@ -3098,12 +3168,12 @@
}
max_pixel_depth = png_ptr->pixel_depth;
-#if defined(PNG_READ_PACK_SUPPORTED)
+#ifdef PNG_READ_PACK_SUPPORTED
if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8)
max_pixel_depth = 8;
#endif
-#if defined(PNG_READ_EXPAND_SUPPORTED)
+#ifdef PNG_READ_EXPAND_SUPPORTED
if (png_ptr->transformations & PNG_EXPAND)
{
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
@@ -3131,7 +3201,7 @@
}
#endif
-#if defined(PNG_READ_FILLER_SUPPORTED)
+#ifdef PNG_READ_FILLER_SUPPORTED
if (png_ptr->transformations & (PNG_FILLER))
{
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
@@ -3153,14 +3223,14 @@
}
#endif
-#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
if (png_ptr->transformations & PNG_GRAY_TO_RGB)
{
if (
-#if defined(PNG_READ_EXPAND_SUPPORTED)
+#ifdef PNG_READ_EXPAND_SUPPORTED
(png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) ||
#endif
-#if defined(PNG_READ_FILLER_SUPPORTED)
+#ifdef PNG_READ_FILLER_SUPPORTED
(png_ptr->transformations & (PNG_FILLER)) ||
#endif
png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
@@ -3212,33 +3282,47 @@
png_error(png_ptr, "This image requires a row greater than 64KB");
#endif
- if (row_bytes + 64 > png_ptr->old_big_row_buf_size)
+ if (row_bytes + 48 > png_ptr->old_big_row_buf_size)
{
png_free(png_ptr, png_ptr->big_row_buf);
- png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 64);
if (png_ptr->interlaced)
- png_memset(png_ptr->big_row_buf, 0, row_bytes + 64);
+ png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr,
+ row_bytes + 48);
+ else
+ png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr,
+ row_bytes + 48);
+ png_ptr->old_big_row_buf_size = row_bytes + 48;
+
+#ifdef PNG_ALIGNED_MEMORY_SUPPORTED
+ /* Use 16-byte aligned memory for row_buf with at least 16 bytes
+ * of padding before and after row_buf.
+ */
+ png_ptr->row_buf = png_ptr->big_row_buf + 32
+ - (((png_alloc_size_t)&(png_ptr->big_row_buf[0]) + 15) % 16);
+ png_ptr->old_big_row_buf_size = row_bytes + 48;
+#else
+ /* Use 32 bytes of padding before and 16 bytes after row_buf. */
png_ptr->row_buf = png_ptr->big_row_buf + 32;
- png_ptr->old_big_row_buf_size = row_bytes + 64;
+#endif
+ png_ptr->old_big_row_buf_size = row_bytes + 48;
}
#ifdef PNG_MAX_MALLOC_64K
- if ((png_uint_32)row_bytes + 1 > (png_uint_32)65536L)
+ if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L)
png_error(png_ptr, "This image requires a row greater than 64KB");
#endif
- if ((png_uint_32)row_bytes > (png_uint_32)(PNG_SIZE_MAX - 1))
- png_error(png_ptr, "Row has too many bytes to allocate in memory.");
-
- if (row_bytes + 1 > png_ptr->old_prev_row_size)
+ if ((png_uint_32)png_ptr->rowbytes > (png_uint_32)(PNG_SIZE_MAX - 1))
+ png_error(png_ptr, "Row has too many bytes to allocate in memory");
+
+ if (png_ptr->rowbytes + 1 > png_ptr->old_prev_row_size)
{
png_free(png_ptr, png_ptr->prev_row);
png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
- row_bytes + 1));
- png_memset_check(png_ptr, png_ptr->prev_row, 0, row_bytes + 1);
- png_ptr->old_prev_row_size = row_bytes + 1;
+ png_ptr->rowbytes + 1));
+ png_ptr->old_prev_row_size = png_ptr->rowbytes + 1;
}
- png_ptr->rowbytes = row_bytes;
+ png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
png_debug1(3, "width = %lu,", png_ptr->width);
png_debug1(3, "height = %lu,", png_ptr->height);