From: Dimitri Schoolwerth <dimitri.schoolwerth@gmail.com>
Date: Fri, 19 Aug 2011 02:27:11 +0000 (+0000)
Subject: Changed TIFF handler's monochrome conversion to look at the green channel instead... 
X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/7f77b25ea8cad399e71bfce5514df6294cce1f45

Changed TIFF handler's monochrome conversion to look at the green channel instead of red.

It's common when reducing a coloured image to greyscale or black and white to give the green channel more significance. Since we're only looking at a single channel use the green one instead of red.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68783 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---

diff --git a/src/common/imagtiff.cpp b/src/common/imagtiff.cpp
index b3209d39f9..e852fc00f0 100644
--- a/src/common/imagtiff.cpp
+++ b/src/common/imagtiff.cpp
@@ -666,9 +666,9 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
                     uint8 reverse = 0;
                     for ( int bp = 0; bp < 8; bp++ )
                     {
-                        if ( ptr[column*24 + bp*3] > 127 )
+                        if ( ptr[column*24 + bp*3 + 1] > 127 )
                         {
-                            // check only red as this is sufficient
+                            // check only green as this is sufficient
                             reverse = (uint8)(reverse | 128 >> bp);
                         }
                     }