diff options
Diffstat (limited to 'Build/source/libs/libpng/pngpread.c')
-rw-r--r-- | Build/source/libs/libpng/pngpread.c | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/Build/source/libs/libpng/pngpread.c b/Build/source/libs/libpng/pngpread.c index d226c75d364..1470b0fe0f6 100644 --- a/Build/source/libs/libpng/pngpread.c +++ b/Build/source/libs/libpng/pngpread.c @@ -1,9 +1,9 @@ /* pngpread.c - read a png file in push mode * - * Last changed in libpng 1.2.13 November 13, 2006 + * Last changed in libpng 1.2.17 May 15, 2007 * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2006 Glenn Randers-Pehrson + * Copyright (c) 1998-2007 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.) */ @@ -1488,8 +1488,6 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) { - png_unknown_chunk chunk; - #ifdef PNG_MAX_MALLOC_64K if (length > (png_uint_32)65535L) { @@ -1498,28 +1496,35 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 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); - png_crc_read(png_ptr, chunk.data, length); - chunk.size = 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_chunk_error(png_ptr, "unknown critical chunk"); + png_set_unknown_chunks(png_ptr, info_ptr, + &png_ptr->unknown_chunk, 1); } - png_set_unknown_chunks(png_ptr, info_ptr, &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 @@ -1553,11 +1558,11 @@ void PNGAPI png_progressive_combine_row (png_structp png_ptr, png_bytep old_row, png_bytep new_row) { - if(png_ptr == NULL) return; #ifdef PNG_USE_LOCAL_ARRAYS const int FARDATA png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; #endif + if(png_ptr == NULL) return; if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */ png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]); } |