X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Feffects%2Fbloom.h;fp=source%2Feffects%2Fbloom.h;h=6b10195b873e684d6af7634b85d8dd31a9f05879;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/effects/bloom.h b/source/effects/bloom.h
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+++ b/source/effects/bloom.h
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+#ifndef MSP_GL_BLOOM_H_
+#define MSP_GL_BLOOM_H_
+
+#include "framebuffer.h"
+#include "mesh.h"
+#include "postprocessor.h"
+#include "texture2d.h"
+#include "texturing.h"
+#include "program.h"
+#include "programdata.h"
+#include "rendertarget.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
+{
+public:
+	struct Template: public PostProcessor::Template
+	{
+		class Loader: public DataFile::DerivedObjectLoader<Template, PostProcessor::Template::Loader>
+		{
+		public:
+			Loader(Template &);
+		};
+
+		float radius;
+		float strength;
+
+		Template();
+
+		virtual Bloom *create(unsigned, unsigned) const;
+	};
+
+private:
+	RenderTarget *target[2];
+	ProgramData common_shdata;
+	Program blur_shader;
+	ProgramData blur_shdata[2];
+	Program combine_shader;
+	Texturing combine_texturing;
+	RefPtr<Mesh> quad;
+	RefPtr<Sampler> nearest_sampler;
+	RefPtr<Sampler> linear_sampler;
+
+public:
+	Bloom(unsigned, unsigned);
+	~Bloom();
+
+	/** 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(Renderer &, const Texture2D &, const Texture2D &);
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif