X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fcore%2Fblend.h;h=da7c8c7f266b1d08a26b95fc525a73fb1940336a;hp=ad7ba241bd1b1028e7e1bea45b5477f6b66245f6;hb=959efbf61663efd7879070ce0447e02c8a447ce0;hpb=24b24e2203c776aacd9744bb947f5cf47b03d328

diff --git a/source/core/blend.h b/source/core/blend.h
index ad7ba241..da7c8c7f 100644
--- a/source/core/blend.h
+++ b/source/core/blend.h
@@ -35,8 +35,18 @@ enum BlendFactor
 	ONE_MINUS_CONSTANT_ALPHA
 };
 
+enum ColorWriteMask
+{
+	WRITE_NONE = 0,
+	WRITE_RED = 1,
+	WRITE_GREEN = 2,
+	WRITE_BLUE = 4,
+	WRITE_ALPHA = 8,
+	WRITE_ALL = 15
+};
+
 /**
-Blends incoming fragments with those already in the framebuffer.
+Blends incoming fragment color values with those already in the framebuffer.
 */
 struct Blend
 {
@@ -51,19 +61,21 @@ struct Blend
 		void factors(BlendFactor, BlendFactor);
 	};
 
-	bool enabled;
-	BlendEquation equation;
-	BlendFactor src_factor;
-	BlendFactor dst_factor;
-	Color constant;
+	bool enabled = false;
+	BlendEquation equation = ADD;
+	BlendFactor src_factor = ONE;
+	BlendFactor dst_factor = ZERO;
+	Color constant = { 0.0f, 0.0f, 0.0f, 0.0f };
+	ColorWriteMask write_mask = WRITE_ALL;
 
-	Blend();
+	Blend() = default;
 	Blend(BlendFactor, BlendFactor);
 	Blend(BlendEquation, BlendFactor, BlendFactor);
 };
 
-unsigned get_gl_blend_equation(BlendEquation);
-unsigned get_gl_blend_factor(BlendFactor);
+
+inline ColorWriteMask operator|(ColorWriteMask m1, ColorWriteMask m2)
+{ return static_cast<ColorWriteMask>(static_cast<int>(m1)|static_cast<int>(m2)); }
 
 void operator>>(const LexicalConverter &, BlendEquation &);
 void operator<<(LexicalConverter &, BlendEquation);
@@ -71,7 +83,12 @@ void operator<<(LexicalConverter &, BlendEquation);
 void operator>>(const LexicalConverter &, BlendFactor &);
 void operator<<(LexicalConverter &, BlendFactor);
 
+void operator>>(const LexicalConverter &, ColorWriteMask &);
+void operator<<(LexicalConverter &, ColorWriteMask);
+
 } // namespace GL
 } // namespace Msp
 
+#include "blend_backend.h"
+
 #endif