From 7cec992b994300a5c6a9c810d7103d863399a428 Mon Sep 17 00:00:00 2001
From: Marco Hugentobler <marco.hugentobler@sourcepole.ch>
Date: Mon, 25 Jun 2012 22:21:03 +0200
Subject: [PATCH] Transparency for WMS rendering

---
 src/core/raster/qgssinglebandcolordatarenderer.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/core/raster/qgssinglebandcolordatarenderer.cpp b/src/core/raster/qgssinglebandcolordatarenderer.cpp
index 21913dd3924a..28ae943c5e64 100644
--- a/src/core/raster/qgssinglebandcolordatarenderer.cpp
+++ b/src/core/raster/qgssinglebandcolordatarenderer.cpp
@@ -84,10 +84,12 @@ void QgsSingleBandColorDataRenderer::draw( QPainter* p, QgsRasterViewPort* viewP
       else
       {
         QRgb pixelColor;
+        double alpha = 255.0;
         for ( int j = 0; j < nRasterCols; ++j )
         {
           QRgb c((( uint* )( rasterData ) )[currentRasterPos] );
-          pixelColor = qRgba( qRed( c ), qGreen( c ), qBlue( c ), 255 );
+          alpha = qAlpha( c );
+          pixelColor = qRgba( qRed( c ), qGreen( c ), qBlue( c ), mOpacity * alpha );
           memcpy( &( scanLine[j*4] ), &pixelColor, 4 );
           ++currentRasterPos;
         }