X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fblend.cpp;h=8b82772fded1e7fc6acc755c312964ac867a0b3b;hp=854b2032d4e26ea31168beaf141790d6ffdb536f;hb=f17794d55923d4fb4f63e9d082d8d84a735a04e8;hpb=02dad9779326e5b8acc1fddbaec3a2f36da15c16

diff --git a/source/blend.cpp b/source/blend.cpp
index 854b2032..8b82772f 100644
--- 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);