- /**
- Renders the effect. Takes the source texture as a parameter.
- */
- virtual void render(const Texture2D &) =0;
+ /// Renders the effect.
+ virtual void render(const Texture2D &color, const Texture2D &depth) = 0;
+
+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. */
+ 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();