From fd70ef69e7fa655122d2ce6c15906f9ced9c64fb Mon Sep 17 00:00:00 2001
From: Hailin Jin <hljin@adobe.com>
Date: Wed, 15 Aug 2007 22:21:06 +0000
Subject: [PATCH] GIL: fixed a endian-ness related bug in PNG IO routines

[SVN r38705]
---
 include/boost/gil/extension/io/png_io_private.hpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/boost/gil/extension/io/png_io_private.hpp b/include/boost/gil/extension/io/png_io_private.hpp
index 56b6c0aa5..8034784f1 100644
--- a/include/boost/gil/extension/io/png_io_private.hpp
+++ b/include/boost/gil/extension/io/png_io_private.hpp
@@ -16,7 +16,7 @@
 /// \brief  Internal support for reading and writing PNG files
 /// \author Hailin Jin and Lubomir Bourdev \n
 ///         Adobe Systems Incorporated
-/// \date   2005-2007 \n Last updated September 24, 2006
+/// \date   2005-2007 \n Last updated August 14, 2007
 
 #include <algorithm>
 #include <vector>
@@ -162,6 +162,8 @@ protected:
         png_init_io(_png_ptr, get());
         png_set_sig_bytes(_png_ptr,PNG_BYTES_TO_CHECK);
         png_read_info(_png_ptr, _info_ptr);
+        if (little_endian() && png_get_bit_depth(_png_ptr,_info_ptr)>8)
+            png_set_swap(_png_ptr);
     }
 public:
     png_reader(FILE* file          ) : file_mgr(file)           { init(); }
@@ -337,6 +339,8 @@ public:
                      PNG_INTERLACE_NONE,
                      PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
         png_write_info(_png_ptr,_info_ptr);
+        if (little_endian() && png_get_bit_depth(_png_ptr,_info_ptr)>8)
+            png_set_swap(_png_ptr);
         std::vector<pixel<typename channel_type<View>::type,
                           layout<typename color_space_type<View>::type> > > row(view.width());
         for(int y=0;y<view.height();++y) {