mewin/libpng
1
0
Fork 0
mirror of https://git.code.sf.net/p/libpng/code.git synced 2025-07-10 18:04:09 +02:00
Code Issues Projects Releases Wiki Activity

[libpng15] Merged pngvalid and pngtest from libpng-1.5; made compressed chunks

Browse Source 
after IDAT work with the progressive read code (this is a minor and
somewhat ugly fix-up; the proper fix is in 1.6).
This commit is contained in:
John Bowler
2013-12-29 10:44:25 -06:00
committed by Glenn Randers-Pehrson
parent c5568595ff
commit 71fcb39efc
7 changed files with 175 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
pngpread.c
View File

@@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
* Last changed in libpng 1.5.11 [June 14, 2012]
* Last changed in libpng 1.5.18 [(PENDING RELEASE)]
* Copyright (c) 1998-2012 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.)
@@ -897,6 +897,12 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
*/
ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH);
/* Hack, added in 1.5.18: the progressive reader does not reset
* png_ptr->zstream, so any attempt to use it after the last IDAT fails
* (silently). This allows the read code to do the reset when required.
*/
png_ptr->flags |= PNG_FLAG_ZSTREAM_PROGRESSIVE;
/* Check for any failure before proceeding. */
if (ret != Z_OK && ret != Z_STREAM_END)
{