Merge pull request #117 from codeprof/patch-2

corrected PixelateEffect to work correctly with premultiplied al…
PintaProject · Apr 3, 2016 · 2861d3e · 2861d3e
2 parents 907276a + 8f4f467
commit 2861d3e
Showing 1 changed file with 5 additions and 5 deletions.
diff --git a/Pinta.Effects/Effects/PixelateEffect.cs b/Pinta.Effects/Effects/PixelateEffect.cs
@@ -55,14 +55,14 @@ private ColorBgra ComputeCellColor (int x, int y, ImageSurface src, int cellSize
 			int bottom = cell.GetBottom ();
 			int top = cell.Top;
 
-			ColorBgra colorTopLeft = src.GetColorBgraUnchecked (left, top);
-			ColorBgra colorTopRight = src.GetColorBgraUnchecked (right, top);
-			ColorBgra colorBottomLeft = src.GetColorBgraUnchecked (left, bottom);
-			ColorBgra colorBottomRight = src.GetColorBgraUnchecked (right, bottom);
+			ColorBgra colorTopLeft = src.GetColorBgraUnchecked (left, top).ToStraightAlpha();
+			ColorBgra colorTopRight = src.GetColorBgraUnchecked (right, top).ToStraightAlpha();
+			ColorBgra colorBottomLeft = src.GetColorBgraUnchecked (left, bottom).ToStraightAlpha();
+			ColorBgra colorBottomRight = src.GetColorBgraUnchecked (right, bottom).ToStraightAlpha();
 
 			ColorBgra c = ColorBgra.BlendColors4W16IP (colorTopLeft, 16384, colorTopRight, 16384, colorBottomLeft, 16384, colorBottomRight, 16384);
 
-			return c;
+			return c.ToPremultipliedAlpha();
 		}
 
 		private Gdk.Rectangle GetCellBox (int x, int y, int cellSize) {