X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fblend.h;h=c4c78d7d51e516fe9e7278c0983dad6446cf6f12;hb=6a4907898281b738111e0c6527cc46f8810dc123;hp=37fc56e17a390132241d0a4761b0c9a6d2692406;hpb=1bff68e595a66f3755743a7ee0f974eb876f3520;p=libs%2Fgl.git

diff --git a/source/blend.h b/source/blend.h
index 37fc56e1..c4c78d7d 100644
--- a/source/blend.h
+++ b/source/blend.h
@@ -1,18 +1,24 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2008  Mikko Rasa, Mikkosoft Productions
+Copyright © 2008, 2010  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
 #ifndef MSP_GL_BLEND_H_
 #define MSP_GL_BLEND_H_
 
+#include "bindable.h"
 #include "gl.h"
 
 namespace Msp {
 namespace GL {
 
+enum
+{
+	BLEND = GL_BLEND
+};
+
 enum BlendEquation
 {
 	ADD              = GL_FUNC_ADD,
@@ -40,6 +46,27 @@ enum BlendFactor
 	ONE_MINUS_CONSTANT_ALPHA = GL_ONE_MINUS_CONSTANT_ALPHA
 };
 
+/**
+Blends incoming fragments with those already in the framebuffer.
+*/
+class Blend: public Bindable<Blend>
+{
+private:
+	BlendEquation eq;
+	BlendFactor src_factor;
+	BlendFactor dst_factor;
+
+public:
+	Blend();
+	Blend(BlendFactor, BlendFactor);
+	Blend(BlendEquation, BlendFactor, BlendFactor);
+
+	void bind() const;
+
+	static const Blend &alpha();
+	static void unbind();
+};
+
 void blend_equation(BlendEquation eq);
 void blend_func(BlendFactor src, BlendFactor dst);