From 3e534d7d7543c4bfc88e02340b1f5e9f5a42469d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lubo=C5=A1=20Lu=C5=88=C3=A1k?= <l.lunak@kde.org>
Date: Mon, 20 Nov 2006 08:39:48 +0000
Subject: [PATCH] Convert to OpenGL coordinates.

svn path=/branches/work/kwin_composite/; revision=606378
---
 scene_opengl.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scene_opengl.cpp b/scene_opengl.cpp
index ccd902446b..90273b4654 100644
--- a/scene_opengl.cpp
+++ b/scene_opengl.cpp
@@ -460,7 +460,11 @@ void SceneOpenGL::flushBuffer( int mask, const QRegion& damage )
             if( glXCopySubBuffer )
                 {
                 foreach( QRect r, damage.rects())
-                    glXCopySubBuffer( display(), glxbuffer, r.x(), r.y(), r.width(), r.height());
+                    {
+                    // convert to OpenGL coordinates
+                    int y = displayHeight() - r.y() - r.height();
+                    glXCopySubBuffer( display(), glxbuffer, r.x(), y, r.width(), r.height());
+                    }
                 }
             else
                 { // no idea why glScissor() is used, but Compiz has it and it doesn't seem to hurt