X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fpostprocessor.h;h=6e3153dab69f9dea7639ffc675ad4386c8d45725;hp=9e4220abd84a24b04330727a18bc0cb8e03deacf;hb=332352298ef41b8ac3a4c57b467dd146c0b05e0b;hpb=f14435e58bfa0fa697a06ba9a454bb30cd37d9d8

diff --git a/source/postprocessor.h b/source/postprocessor.h
index 9e4220ab..6e3153da 100644
--- a/source/postprocessor.h
+++ b/source/postprocessor.h
@@ -1,25 +1,65 @@
 #ifndef MSP_GL_POSTPROCESSOR_H_
 #define MSP_GL_POSTPROCESSOR_H_
 
+#include <msp/datafile/objectloader.h>
+
 namespace Msp {
 namespace GL {
 
+class Mesh;
+class Renderer;
+class Shader;
 class Texture2D;
 
 /**
-Base class for post-processing effects.
+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;
+	};
+
 protected:
 	PostProcessor() { }
 public:
 	virtual ~PostProcessor() { }
 
-	/**
-	Renders the effect.  Takes the source texture as a parameter.
-	*/
-	virtual void render(const Texture2D &, const Texture2D &) = 0;
+	/// Renders the effect.
+	virtual void render(const Texture2D &, const Texture2D &) { }
+
+	virtual void render(Renderer &, const Texture2D &, const Texture2D &);
+
+protected:
+	/** Returns a vertex shader suitable for rendering a full-screen quad.
+	Input vertices are assumed to be in normalized device coordinates; no
+	transform is performed.  The shader provides a varying vec2 texcoord for
+	a fragment shader to access textures.
+	
+	Deprecated in favor of the builtin postprocess.glsl module. */
+	static Shader &get_fullscreen_vertex_shader();
+
+	/** Returns a mesh consisting of a single quad, covering the entire screen.
+	The vertices are in normalized device coordinates. */
+	static const Mesh &get_fullscreen_quad();
+
+private:
+	static const Mesh &create_fullscreen_quad();
 };
 
 } // namespace GL