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Diffstat (limited to 'Build/source/libs/libpng/pngrutil.c')
-rw-r--r--Build/source/libs/libpng/pngrutil.c55
1 files changed, 37 insertions, 18 deletions
diff --git a/Build/source/libs/libpng/pngrutil.c b/Build/source/libs/libpng/pngrutil.c
index 990e69802b1..531cb0570eb 100644
--- a/Build/source/libs/libpng/pngrutil.c
+++ b/Build/source/libs/libpng/pngrutil.c
@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
- * Last changed in libpng 1.2.25 [February 18, 2008]
+ * Last changed in libpng 1.2.27 [April 29, 2008]
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2008 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1241,15 +1241,9 @@ void /* PRIVATE */
png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_byte readbuf[PNG_MAX_PALETTE_LENGTH];
- int bit_mask;
png_debug(1, "in png_handle_tRNS\n");
- /* For non-indexed color, mask off any bits in the tRNS value that
- * exceed the bit depth. Some creators were writing extra bits there.
- * This is not needed for indexed color. */
- bit_mask = (1 << png_ptr->bit_depth) - 1;
-
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before tRNS");
else if (png_ptr->mode & PNG_HAVE_IDAT)
@@ -1278,7 +1272,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_crc_read(png_ptr, buf, 2);
png_ptr->num_trans = 1;
- png_ptr->trans_values.gray = png_get_uint_16(buf) & bit_mask;
+ png_ptr->trans_values.gray = png_get_uint_16(buf);
}
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
{
@@ -1292,9 +1286,9 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
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) & bit_mask;
- png_ptr->trans_values.green = png_get_uint_16(buf + 2) & bit_mask;
- png_ptr->trans_values.blue = png_get_uint_16(buf + 4) & bit_mask;
+ 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);
}
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
@@ -2227,9 +2221,14 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
(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';
- png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
png_ptr->unknown_chunk.size = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
+ if (length == 0)
+ png_ptr->unknown_chunk.data = NULL;
+ 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);
+ }
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
if(png_ptr->read_user_chunk_fn != NULL)
{
@@ -2251,7 +2250,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
else
#endif
- png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
+ png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
png_free(png_ptr, png_ptr->unknown_chunk.data);
png_ptr->unknown_chunk.data = NULL;
}
@@ -2851,6 +2850,7 @@ 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 */
/* start of interlace block */
@@ -2864,6 +2864,7 @@ png_read_finish_row(png_structp png_ptr)
/* 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\n");
@@ -2871,6 +2872,7 @@ png_read_finish_row(png_structp png_ptr)
if (png_ptr->row_number < png_ptr->num_rows)
return;
+#ifdef PNG_READ_INTERLACING_SUPPORTED
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
@@ -2905,6 +2907,7 @@ png_read_finish_row(png_structp png_ptr)
if (png_ptr->pass < 7)
return;
}
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
{
@@ -2979,6 +2982,7 @@ 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 */
/* start of interlace block */
@@ -2993,6 +2997,7 @@ png_read_start_row(png_structp png_ptr)
/* 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_uint_32 row_bytes;
@@ -3000,6 +3005,7 @@ png_read_start_row(png_structp png_ptr)
png_debug(1, "in png_read_start_row\n");
png_ptr->zstream.avail_in = 0;
png_init_read_transformations(png_ptr);
+#ifdef PNG_READ_INTERLACING_SUPPORTED
if (png_ptr->interlaced)
{
if (!(png_ptr->transformations & PNG_INTERLACE))
@@ -3020,6 +3026,7 @@ png_read_start_row(png_structp png_ptr)
png_error(png_ptr, "Rowbytes overflow in png_read_start_row");
}
else
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
{
png_ptr->num_rows = png_ptr->height;
png_ptr->iwidth = png_ptr->width;
@@ -3138,8 +3145,14 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if (row_bytes > (png_uint_32)65536L)
png_error(png_ptr, "This image requires a row greater than 64KB");
#endif
- png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
- png_ptr->row_buf = png_ptr->big_row_buf+32;
+
+ if(row_bytes + 64 > 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);
+ png_ptr->row_buf = png_ptr->big_row_buf+32;
+ png_ptr->old_big_row_buf_size = row_bytes+64;
+ }
#ifdef PNG_MAX_MALLOC_64K
if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L)
@@ -3147,8 +3160,14 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
#endif
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.");
- png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
- png_ptr->rowbytes + 1));
+
+ 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)(
+ png_ptr->rowbytes + 1));
+ png_ptr->old_prev_row_size = png_ptr->rowbytes+1;
+ }
png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1);