gentoo-overlay/media-libs/libpng/files/libpng-1.6.1-Corrected-length-written-to-uncompressed-iT.patch

From 9bb775fc8cbde98fca150992efe227937b9278ff Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Sat, 13 Apr 2013 14:19:25 -0500
Subject: [PATCH 1/5] [libpng16] Corrected length written to uncompressed iTXt
 chunks (Samuli Suominen).

---
 ANNOUNCE   | 1 +
 CHANGES    | 1 +
 pngwutil.c | 6 +++---
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/pngwutil.c b/pngwutil.c
index 8c49cfd..8f66937 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Last changed in libpng 1.6.2 [(PENDING RELEASE)]
  * Copyright (c) 1998-2013 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.)
@@ -1738,16 +1738,16 @@ png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key,
    {
       if (png_text_compress(png_ptr, png_iTXt, &comp, prefix_len) != Z_OK)
          png_error(png_ptr, png_ptr->zstream.msg);
+      png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len);
    }
 
    else
    {
       if (comp.input_len > PNG_UINT_31_MAX-prefix_len)
          png_error(png_ptr, "iTXt: uncompressed text too long");
+      png_write_chunk_header(png_ptr, png_iTXt, strlen(text) + prefix_len);
    }
 
-   png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len);
-
    png_write_chunk_data(png_ptr, new_key, key_len);
 
    png_write_chunk_data(png_ptr, (png_const_bytep)lang, lang_len);
-- 
1.8.1.5