From 33f360f52f363e67a65b1432a33442d9bfc0a303 Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Mon, 9 Apr 2012 15:36:51 +0200
Subject: [PATCH] transparency fix

---
 libs/openengine/ogre/imagerotate.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libs/openengine/ogre/imagerotate.cpp b/libs/openengine/ogre/imagerotate.cpp
index a6304277eb..166a1d3c60 100644
--- a/libs/openengine/ogre/imagerotate.cpp
+++ b/libs/openengine/ogre/imagerotate.cpp
@@ -54,7 +54,7 @@ void ImageRotate::rotate(const std::string& sourceImage, const std::string& dest
                     TEX_TYPE_2D,
                     width, height,
                     0,
-                    PF_R8G8B8,
+                    PF_A8R8G8B8,
                     TU_RENDERTARGET);
 
     RenderTarget* rtt = destTexture->getBuffer()->getRenderTarget();
@@ -62,6 +62,8 @@ void ImageRotate::rotate(const std::string& sourceImage, const std::string& dest
     Viewport* vp = rtt->addViewport(camera);
     vp->setOverlaysEnabled(false);
     vp->setShadowsEnabled(false);
+    vp->setBackgroundColour(ColourValue(0,0,0,0));
+    vp->setClearEveryFrame(true, FBT_DEPTH);
 
     rtt->update();
     rtt->writeContentsToFile(destImage);