X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Feffects%2Fpostprocessor.h;fp=source%2Feffects%2Fpostprocessor.h;h=c107d885f658e028522fdb0fe463bbd755d60d1d;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/effects/postprocessor.h b/source/effects/postprocessor.h
new file mode 100644
index 00000000..c107d885
--- /dev/null
+++ b/source/effects/postprocessor.h
@@ -0,0 +1,66 @@
+#ifndef MSP_GL_POSTPROCESSOR_H_
+#define MSP_GL_POSTPROCESSOR_H_
+
+#include <msp/datafile/objectloader.h>
+
+namespace Msp {
+namespace GL {
+
+class Mesh;
+class Renderer;
+class Sampler;
+class Shader;
+class Texture2D;
+
+/**
+Base class for post-processing effects.  Post-processors receive the contents
+of the entire framebuffer as a texture and render it back, altering it in the
+process.
+*/
+class PostProcessor
+{
+public:
+	struct Template
+	{
+		class Loader: public Msp::DataFile::ObjectLoader<Template>
+		{
+		public:
+			Loader(Template &);
+		};
+
+		unsigned size_divisor;
+
+		Template();
+		virtual ~Template() { }
+
+		virtual PostProcessor *create(unsigned, unsigned) const = 0;
+	};
+
+private:
+	static WeakPtr<Mesh> fullscreen_quad;
+	static WeakPtr<Sampler> nearest_sampler;
+	static WeakPtr<Sampler> linear_sampler;
+
+protected:
+	PostProcessor() { }
+public:
+	virtual ~PostProcessor() { }
+
+	/// Renders the effect.
+	virtual void render(const Texture2D &, const Texture2D &) { }
+
+	virtual void render(Renderer &, const Texture2D &, const Texture2D &);
+
+protected:
+	/** Returns a mesh consisting of a single quad, covering the entire screen.
+	The vertices are in normalized device coordinates. */
+	static RefPtr<Mesh> get_fullscreen_quad();
+
+	static RefPtr<Sampler> get_nearest_sampler();
+	static RefPtr<Sampler> get_linear_sampler();
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif