diff options
Diffstat (limited to 'Build/source/libs/libpng/pngrutil.c')
-rw-r--r-- | Build/source/libs/libpng/pngrutil.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/Build/source/libs/libpng/pngrutil.c b/Build/source/libs/libpng/pngrutil.c index 6157b3de46e..2abca7cc54b 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 1.2.15 January 5, 2007 + * Last changed in libpng 1.2.17 May 15, 2007 * For conditions of distribution and use, see copyright notice in png.h * Copyright (c) 1998-2007 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) @@ -181,7 +181,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type, png_charp chunkdata, png_size_t chunklength, png_size_t prefix_size, png_size_t *newlength) { - static char msg[] = "Error decoding compressed text"; + const static char msg[] = "Error decoding compressed text"; png_charp text; png_size_t text_size; @@ -1314,7 +1314,10 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } if (png_crc_finish(png_ptr, 0)) + { + png_ptr->num_trans = 0; return; + } png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans, &(png_ptr->trans_values)); @@ -2173,8 +2176,6 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) || (png_ptr->read_user_chunk_fn != NULL)) { - png_unknown_chunk chunk; - #ifdef PNG_MAX_MALLOC_64K if (length > (png_uint_32)65535L) { @@ -2183,30 +2184,35 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) length = (png_uint_32)65535L; } #endif - png_strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name); - chunk.data = (png_bytep)png_malloc(png_ptr, length); - chunk.size = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)chunk.data, length); + png_strcpy((png_charp)png_ptr->unknown_chunk.name, + (png_charp)png_ptr->chunk_name); + 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 defined(PNG_READ_USER_CHUNKS_SUPPORTED) if(png_ptr->read_user_chunk_fn != NULL) { /* callback to user unknown chunk handler */ - if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0) + int ret; + ret = (*(png_ptr->read_user_chunk_fn)) + (png_ptr, &png_ptr->unknown_chunk); + if (ret < 0) + png_chunk_error(png_ptr, "error in user chunk"); + if (ret == 0) { if (!(png_ptr->chunk_name[0] & 0x20)) if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != PNG_HANDLE_CHUNK_ALWAYS) - { - png_free(png_ptr, chunk.data); png_chunk_error(png_ptr, "unknown critical chunk"); - } - png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1); + png_set_unknown_chunks(png_ptr, info_ptr, + &png_ptr->unknown_chunk, 1); } } - else +#else + png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); #endif - png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1); - png_free(png_ptr, chunk.data); + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; } else #endif |