Add comment

qgis · Dec 12, 2012 · d9a3c99 · d9a3c99
1 parent 67f7af2
commit d9a3c99
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/core/raster/qgspalettedrasterrenderer.cpp b/src/core/raster/qgspalettedrasterrenderer.cpp
@@ -171,6 +171,8 @@ QgsRasterBlock * QgsPalettedRasterRenderer::block( int bandNo, QgsRectangle  con
     return outputBlock;
   }
 
+  //use direct data access instead of QgsRasterBlock::setValue
+  //because of performance
   unsigned int* outputData = ( unsigned int* )( outputBlock->data() );
 
   size_t rasterSize = ( size_t )width * height;