Add object-oriented interfaces for the various tests and blending

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

diff --git a/source/blend.cpp b/source/blend.cpp
index 854b2032d4e26ea31168beaf141790d6ffdb536f..8b82772fded1e7fc6acc755c312964ac867a0b3b 100644 (file)
--- a/source/blend.cpp
+++ b/source/blend.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2008  Mikko Rasa, Mikkosoft Productions
+Copyright © 2008, 2010  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -12,6 +12,51 @@ Distributed under the LGPL
 namespace Msp {
 namespace GL {
 
+Blend::Blend():
+       eq(ADD),
+       src_factor(ONE),
+       dst_factor(ZERO)
+{ }
+
+Blend::Blend(BlendFactor sf, BlendFactor df):
+       eq(ADD),
+       src_factor(sf),
+       dst_factor(df)
+{ }
+
+Blend::Blend(BlendEquation e, BlendFactor sf, BlendFactor df):
+       eq(e),
+       src_factor(sf),
+       dst_factor(df)
+{
+       if(eq!=ADD)
+               static RequireVersion _ver(1, 2);
+}
+
+void Blend::bind() const
+{
+       if(set_current(this))
+       {
+               glEnable(GL_BLEND);
+               // XXX Don't try to set equation if version < 1.2
+               glBlendEquation(eq);
+               glBlendFunc(src_factor, dst_factor);
+       }
+}
+
+const Blend &Blend::alpha()
+{
+       static Blend blend(SRC_ALPHA, ONE_MINUS_SRC_ALPHA);
+       return blend;
+}
+
+void Blend::unbind()
+{
+       if(set_current(0))
+               glDisable(GL_BLEND);
+}
+
+
 void blend_equation(BlendEquation eq)
 {
        static RequireVersion _ver(1, 2);