Bugfix by Radim: prevent extra multiplication if alpha is 1

qgis · Jun 26, 2012 · 8304d6a · 8304d6a
1 parent 10ad3fb
commit 8304d6a
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/src/core/raster/qgsmultibandcolorrenderer.cpp b/src/core/raster/qgsmultibandcolorrenderer.cpp
@@ -295,7 +295,7 @@ void QgsMultiBandColorRenderer::draw( QPainter* p, QgsRasterViewPort* viewPort,
           currentOpacity *= ( readValue( alphaData, transparencyType, currentRasterPos ) / 255.0 );
         }
 
-        if ( doubleNear( currentOpacity, 255 ) )
+        if ( doubleNear( currentOpacity, 1.0 ) )
         {
           imageScanLine[j] = qRgba( redVal, greenVal, blueVal, 255 );
         }

diff --git a/src/core/raster/qgssinglebandgrayrenderer.cpp b/src/core/raster/qgssinglebandgrayrenderer.cpp
@@ -149,7 +149,7 @@ void QgsSingleBandGrayRenderer::draw( QPainter* p, QgsRasterViewPort* viewPort,
           grayVal = 255 - grayVal;
         }
 
-        if ( doubleNear( currentAlpha, 255 ) )
+        if ( doubleNear( currentAlpha, 1.0 ) )
         {
           imageScanLine[j] = qRgba( grayVal, grayVal, grayVal, 255 );
         }