From 913f03a2ba319bb8f1ec35a980b28dab471aee00 Mon Sep 17 00:00:00 2001
From: Einar Johan Trøan Sømåen
Date: Tue, 20 Aug 2013 15:24:35 +0200
Subject: WINTERMUTE: Avoid doing alpha-blits when image doesn't have alpha.
 Also detect images with only binary alpha.

---
 engines/wintermute/graphics/transform_struct.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'engines/wintermute/graphics')

diff --git a/engines/wintermute/graphics/transform_struct.h b/engines/wintermute/graphics/transform_struct.h
index a54c4cc5d0..f4f97d1ea9 100644
--- a/engines/wintermute/graphics/transform_struct.h
+++ b/engines/wintermute/graphics/transform_struct.h
@@ -42,6 +42,12 @@ const int32 kDefaultOffsetX = 0;
 const int32 kDefaultOffsetY = 0;
 const int32 kDefaultAngle = 0;
 
+enum AlphaType {
+	ALPHA_OPAQUE = 0,
+	ALPHA_BINARY = 1,
+	ALPHA_FULL = 2
+};
+
 struct TransformStruct {
 private:
 	void init(Point32 zoom, uint32 angle, Point32 hotspot, bool alphaDisable, TSpriteBlendMode blendMode, uint32 alpha, bool mirrorX, bool mirrorY, Point32 offset);
-- 
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