X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frenderer.h;h=1254b7adf3951ffc6b2dfd1d1890e9ceb8598290;hb=ae9abd6be3e556d0a202cc5ab05668da715382c9;hp=ef17b3e62043ad847969f4b7e6102854e52fc55c;hpb=ccbcce1d5c7fae8ec644e465ac936f5c39000e57;p=libs%2Fgl.git

diff --git a/source/renderer.h b/source/renderer.h
index ef17b3e6..1254b7ad 100644
--- a/source/renderer.h
+++ b/source/renderer.h
@@ -1,15 +1,10 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2011  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GL_RENDERER_H_
 #define MSP_GL_RENDERER_H_
 
+#include <set>
 #include <vector>
 #include "matrix.h"
+#include "tag.h"
 
 namespace Msp {
 namespace GL {
@@ -18,8 +13,10 @@ class Batch;
 class Buffer;
 class Camera;
 class Material;
+class Lighting;
 class Program;
 class ProgramData;
+class Renderable;
 class Texture;
 class Texturing;
 class VertexArray;
@@ -31,7 +28,14 @@ particular, Objects and Scenes) can by rendered without a Renderer, using one
 will often be more efficient.  This is especially true for ObjectInstances.
 
 The Renderer works by deferring GL state changes until something is actually
-being drawn.  This avoids many unnecessary GL calls. */
+being drawn.  This avoids many unnecessary GL calls if consecutive renderables
+use the same resources.
+
+A state stack is provided to help with state scoping.  Typically a Renderable
+will push the current state on entry, set whatever state it requires, render
+itself, and pop the state when it's done.  An RAII helper class is provided for
+the push/pop operation.
+*/
 class Renderer
 {
 public:
@@ -45,15 +49,29 @@ public:
 		~Push() { renderer.pop_state(); }
 	};
 
+	class Exclude
+	{
+	private:
+		Renderer &renderer;
+		const Renderable &renderable;
+
+	public:
+		Exclude(Renderer &r, const Renderable &e): renderer(r), renderable(e) { renderer.exclude(renderable); }
+		~Exclude() { renderer.include(renderable); }
+	};
+
 private:
 	struct State
 	{
 		const Texture *texture;
 		const Texturing *texturing;
 		const Material *material;
+		const Lighting *lighting;
+		Matrix lighting_matrix;
 		const Program *shprog;
-		std::vector<const ProgramData *> shdata;
+		unsigned shdata_count;
 		const WindingTest *winding_test;
+		bool reverse_winding;
 
 		State();
 	};
@@ -72,11 +90,14 @@ private:
 	MtxStack mtx_stack;
 	bool mtx_changed;
 	const Camera *camera;
-	std::list<State> state_stack;
+	std::vector<State> state_stack;
 	State *state;
+	bool lighting_changed;
+	std::vector<const ProgramData *> shdata_stack;
+	bool shdata_changed;
 	const VertexArray *vertex_array;
-	bool vertex_array_changed;
 	const Buffer *element_buffer;
+	std::set<const Renderable *> excluded;
 
 public:
 	Renderer(const Camera *);
@@ -89,18 +110,39 @@ public:
 	void set_texture(const Texture *);
 	void set_texturing(const Texturing *);
 	void set_material(const Material *);
-	void set_shader(const Program *, const ProgramData *);
-	void add_shader_data(const ProgramData *);
+
+	void set_lighting(const Lighting *);
+
+	/** Sets the shader program to use.  An initial set of data can be set as
+	well, with the same semantics as add_shader_data. */
+	void set_shader_program(const Program *prog, const ProgramData *data = 0);
+
+	/** Adds another set of data to be use with shader programs.  The data is
+	independent of any shader program changes and remains in effect until the
+	Renderer state is popped. */
+	void add_shader_data(const ProgramData &data);
+
 	void set_vertex_array(const VertexArray *);
 	void set_element_buffer(const Buffer *);
 	void set_winding_test(const WindingTest *);
+	void set_reverse_winding(bool);
 
+	/** Saves the current state so it can be restored later. */
 	void push_state();
+
+	/** Restores a previously saved state.  Must be matched with an earlier
+	push_state call. */
 	void pop_state();
 
-	/** Prepares for temporarily bypassing the Renderer. */
+	/** Prepares for temporarily bypassing the Renderer by synchronizing the
+	current state with GL.  No additional call is necessary to resume using the
+	Renderer. */
 	void escape();
 
+	void exclude(const Renderable &);
+	void include(const Renderable &);
+
+	void render(const Renderable &, const Tag & = Tag());
 	void draw(const Batch &);
 
 private: