Support overriding uniforms in inherited Techniques

[libs/gl.git] / source / blend.h

diff --git a/source/blend.h b/source/blend.h
index 37fc56e17a390132241d0a4761b0c9a6d2692406..e7b291e617dab5c2044e787c99ee7a09a7dfcac5 100644 (file)
--- a/source/blend.h
+++ b/source/blend.h
@@ -1,14 +1,10 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2008  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GL_BLEND_H_
 #define MSP_GL_BLEND_H_
 
+#include <msp/strings/lexicalcast.h>
+#include "bindable.h"
 #include "gl.h"
+#include <msp/gl/extensions/ext_blend_minmax.h>
 
 namespace Msp {
 namespace GL {
@@ -40,8 +36,32 @@ enum BlendFactor
        ONE_MINUS_CONSTANT_ALPHA = GL_ONE_MINUS_CONSTANT_ALPHA
 };
 
-void blend_equation(BlendEquation eq);
-void blend_func(BlendFactor src, BlendFactor dst);
+/**
+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 void unbind();
+
+       static const Blend &alpha();
+       static const Blend &additive();
+       static const Blend &additive_alpha();
+};
+
+void operator>>(const LexicalConverter &, BlendFactor &);
+void operator<<(LexicalConverter &, BlendFactor);
 
 } // namespace GL
 } // namespace Msp