X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=source%2Fbloom.h;fp=source%2Fbloom.h;h=c02604afc0a281a918076190433f6e15ae2e4f1d;hb=119d9819ac9e9a8d274d2410beffe54e470485a3;hp=0000000000000000000000000000000000000000;hpb=d653d25b548070c688e40c052730d63345ce70c9;p=libs%2Fgl.git

diff --git a/source/bloom.h b/source/bloom.h
new file mode 100644
index 00000000..c02604af
--- /dev/null
+++ b/source/bloom.h
@@ -0,0 +1,57 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2009  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_GL_BLOOM_H_
+#define MSP_GL_BLOOM_H_
+
+#include "framebuffer.h"
+#include "mesh.h"
+#include "postprocessor.h"
+#include "texture2d.h"
+#include "program.h"
+#include "programdata.h"
+
+namespace Msp {
+namespace GL {
+
+/**
+The Bloom post-processing effect causes very bright areas of the image to bleed
+into surrounding pixels.  Commonly used together with HDR rendering.
+
+The technique used is to gaussian blur the image and then blend the result with
+the original image.  With suitable parameters, this effect may also be used as
+a blur filter.
+*/
+class Bloom: public PostProcessor
+{
+private:
+	Framebuffer fbo;
+	Texture2D tex[2];
+	Program blur_shader;
+	ProgramData blur_shdata[2];
+	Program combine_shader;
+	ProgramData combine_shdata;
+	Mesh quad;
+
+public:
+	Bloom(unsigned, unsigned);
+	
+	/** Sets the σ value of the gaussian blur.  Values much larger than 4.0 are
+	likely to cause artifacts. */
+	void set_radius(float);
+
+	/** Sets the blend factor between original and blurred images.  Larger
+	values mean more blurriness. */
+	void set_strength(float);
+
+	virtual void render(const Texture2D &);
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif