X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fblend.cpp;h=8b82772fded1e7fc6acc755c312964ac867a0b3b;hb=95e926ee2bb662fe8795546db4bdebd1a0aff85b;hp=841d88b86e1f7e8070edf60c6c390f010f8c33dc;hpb=a5797c9babd17673285b3b15c7572c2d8fe1595c;p=libs%2Fgl.git

diff --git a/source/blend.cpp b/source/blend.cpp
index 841d88b8..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
 */
 
@@ -12,9 +12,54 @@ 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)
 {
-	require_version(1, 2);
+	static RequireVersion _ver(1, 2);
 	glBlendEquation(eq);
 }