X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fblend.h;fp=source%2Fcore%2Fblend.h;h=e7b291e617dab5c2044e787c99ee7a09a7dfcac5;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/core/blend.h b/source/core/blend.h
new file mode 100644
index 00000000..e7b291e6
--- /dev/null
+++ b/source/core/blend.h
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+#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 {
+
+enum BlendEquation
+{
+	ADD              = GL_FUNC_ADD,
+	SUBTRACT         = GL_FUNC_SUBTRACT,
+	REVERSE_SUBTRACT = GL_FUNC_REVERSE_SUBTRACT,
+	MIN              = GL_MIN,
+	MAX              = GL_MAX
+};
+
+enum BlendFactor
+{
+	ZERO = GL_ZERO,
+	ONE = GL_ONE,
+	SRC_COLOR = GL_SRC_COLOR,
+	ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR,
+	SRC_ALPHA = GL_SRC_ALPHA,
+	ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA,
+	DST_COLOR = GL_DST_COLOR,
+	ONE_MINUS_DST_COLOR = GL_ONE_MINUS_DST_COLOR,
+	DST_ALPHA = GL_DST_ALPHA,
+	ONE_MINUS_DST_ALPHA = GL_ONE_MINUS_DST_ALPHA,
+	CONSTANT_COLOR = GL_CONSTANT_COLOR,
+	ONE_MINUS_CONSTANT_COLOR = GL_ONE_MINUS_CONSTANT_COLOR,
+	CONSTANT_ALPHA = GL_CONSTANT_ALPHA,
+	ONE_MINUS_CONSTANT_ALPHA = GL_ONE_MINUS_CONSTANT_ALPHA
+};
+
+/**
+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
+
+#endif