From e7a802700c3872215049d304fb6898549eef56f5 Mon Sep 17 00:00:00 2001
From: Einar Johan Trøan Sømåen
Date: Sat, 2 Jun 2012 13:48:26 +0200
Subject: WINTERMUTE: Add color-keying for BSurfaceSDL BMPs

---
 engines/wintermute/graphics/transparentSurface.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'engines/wintermute/graphics')

diff --git a/engines/wintermute/graphics/transparentSurface.cpp b/engines/wintermute/graphics/transparentSurface.cpp
index d7f8719b6e..33f2043839 100644
--- a/engines/wintermute/graphics/transparentSurface.cpp
+++ b/engines/wintermute/graphics/transparentSurface.cpp
@@ -278,6 +278,7 @@ TransparentSurface *TransparentSurface::scale(int xSize, int ySize) const {
  * @param overwriteAlpha if true, all other alpha will be set fully opaque
  */
 void TransparentSurface::applyColorKey(uint8 rKey, uint8 gKey, uint8 bKey, bool overwriteAlpha) {
+	assert(format.bytesPerPixel == 4);
 	for (int i = 0; i < h; i++) {
 		for (int j = 0; j < w; j++) {
 			uint32 pix = ((uint32 *)pixels)[i * w + j];
-- 
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