X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Feffects%2Fambientocclusion.h;fp=source%2Feffects%2Fambientocclusion.h;h=6c2c5d7eea938daa6be0e6e5ce2387dd2a361660;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/effects/ambientocclusion.h b/source/effects/ambientocclusion.h
new file mode 100644
index 00000000..6c2c5d7e
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+++ b/source/effects/ambientocclusion.h
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+#ifndef MSP_GL_AMBIENTOCCLUSION_H_
+#define MSP_GL_AMBIENTOCCLUSION_H_
+
+#include "framebuffer.h"
+#include "mesh.h"
+#include "postprocessor.h"
+#include "program.h"
+#include "programdata.h"
+#include "rendertarget.h"
+#include "texture2d.h"
+#include "texturing.h"
+
+namespace Msp {
+namespace GL {
+
+/**
+Implements screen-space ambient occlusion.
+
+http://en.wikipedia.org/wiki/Screen_Space_Ambient_Occlusion
+*/
+class AmbientOcclusion: public PostProcessor
+{
+public:
+	struct Template: PostProcessor::Template
+	{
+		class Loader: public DataFile::DerivedObjectLoader<Template, PostProcessor::Template::Loader>
+		{
+		public:
+			Loader(Template &);
+		};
+
+		unsigned n_samples;
+		float occlusion_radius;
+		float darkness;
+		float edge_depth_threshold;
+
+		Template();
+
+		virtual AmbientOcclusion *create(unsigned, unsigned) const;
+	};
+
+private:
+	Texture2D rotate_lookup;
+	RenderTarget occlude_target;
+	Texturing texturing;
+	Program occlude_shader;
+	Program combine_shader;
+	mutable ProgramData shdata;
+	RefPtr<Mesh> quad;
+	RefPtr<Sampler> linear_sampler;
+	RefPtr<Sampler> nearest_sampler;
+
+public:
+	AmbientOcclusion(unsigned, unsigned, float = 1.0f);
+
+private:
+	static float random(unsigned &);
+
+public:
+	void set_n_samples(unsigned);
+	void set_occlusion_radius(float);
+	void set_edge_depth_threshold(float);
+
+	void set_darkness(float);
+
+	virtual void render(Renderer &, const Texture2D &, const Texture2D &);
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif