diff options
Diffstat (limited to 'src/3rdparty/libpng/pngpread.c')
| -rw-r--r-- | src/3rdparty/libpng/pngpread.c | 46 |
1 files changed, 28 insertions, 18 deletions
diff --git a/src/3rdparty/libpng/pngpread.c b/src/3rdparty/libpng/pngpread.c index 89ffc4018f..650ba1e232 100644 --- a/src/3rdparty/libpng/pngpread.c +++ b/src/3rdparty/libpng/pngpread.c @@ -1,8 +1,8 @@ /* pngpread.c - read a png file in push mode * - * Last changed in libpng 1.6.18 [July 23, 2015] - * Copyright (c) 1998-2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.24 [August 4, 2016] + * Copyright (c) 1998-2002,2004,2006-2016 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.) * @@ -77,11 +77,11 @@ png_process_data_pause(png_structrp png_ptr, int save) png_uint_32 PNGAPI png_process_data_skip(png_structrp png_ptr) { - /* TODO: Deprecate and remove this API. - * Somewhere the implementation of this seems to have been lost, - * or abandoned. It was only to support some internal back-door access - * to png_struct) in libpng-1.4.x. - */ +/* TODO: Deprecate and remove this API. + * Somewhere the implementation of this seems to have been lost, + * or abandoned. It was only to support some internal back-door access + * to png_struct) in libpng-1.4.x. + */ png_app_warning(png_ptr, "png_process_data_skip is not implemented in any current version of libpng"); return 0; @@ -210,12 +210,14 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr) (png_ptr->mode & PNG_HAVE_PLTE) == 0) png_error(png_ptr, "Missing PLTE before IDAT"); - png_ptr->mode |= PNG_HAVE_IDAT; png_ptr->process_mode = PNG_READ_IDAT_MODE; - if ((png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) == 0) - if (png_ptr->push_length == 0) - return; + if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) + if ((png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) == 0) + if (png_ptr->push_length == 0) + return; + + png_ptr->mode |= PNG_HAVE_IDAT; if ((png_ptr->mode & PNG_AFTER_IDAT) != 0) png_benign_error(png_ptr, "Too many IDATs found"); @@ -408,7 +410,7 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr) { PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length, - PNG_HANDLE_CHUNK_AS_DEFAULT); + PNG_HANDLE_CHUNK_AS_DEFAULT); } png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; @@ -499,7 +501,10 @@ png_push_save_buffer(png_structrp png_ptr) png_error(png_ptr, "Insufficient memory for save_buffer"); } - memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); + if (old_buffer) + memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); + else if (png_ptr->save_buffer_size) + png_error(png_ptr, "save_buffer error"); png_free(png_ptr, old_buffer); png_ptr->save_buffer_max = new_max; } @@ -516,7 +521,7 @@ png_push_save_buffer(png_structrp png_ptr) void /* PRIVATE */ png_push_restore_buffer(png_structrp png_ptr, png_bytep buffer, - png_size_t buffer_length) + png_size_t buffer_length) { png_ptr->current_buffer = buffer; png_ptr->current_buffer_size = buffer_length; @@ -619,7 +624,7 @@ png_push_read_IDAT(png_structrp png_ptr) void /* PRIVATE */ png_process_IDAT_data(png_structrp png_ptr, png_bytep buffer, - png_size_t buffer_length) + png_size_t buffer_length) { /* The caller checks for a non-zero buffer length. */ if (!(buffer_length > 0) || buffer == NULL) @@ -679,7 +684,12 @@ png_process_IDAT_data(png_structrp png_ptr, png_bytep buffer, png_warning(png_ptr, "Truncated compressed data in IDAT"); else - png_error(png_ptr, "Decompression error in IDAT"); + { + if (ret == Z_DATA_ERROR) + png_benign_error(png_ptr, "IDAT: ADLER32 checksum mismatch"); + else + png_error(png_ptr, "Decompression error in IDAT"); + } /* Skip the check on unprocessed input */ return; @@ -777,7 +787,7 @@ png_push_process_row(png_structrp png_ptr) { if (png_ptr->pass < 6) png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, - png_ptr->transformations); + png_ptr->transformations); switch (png_ptr->pass) { @@ -1039,7 +1049,7 @@ png_push_have_row(png_structrp png_ptr, png_bytep row) { if (png_ptr->row_fn != NULL) (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number, - (int)png_ptr->pass); + (int)png_ptr->pass); } #ifdef PNG_READ_INTERLACING_SUPPORTED |