1 /*
2  Copyright (c) 2013 yvt
3 
4  This file is part of OpenSpades.
5 
6  OpenSpades is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10 
11  OpenSpades is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15 
16  You should have received a copy of the GNU General Public License
17  along with OpenSpades.  If not, see <http://www.gnu.org/licenses/>.
18 
19  */
20 
21 #pragma once
22 
23 #include <vector>
24 
25 #include "GLProgramUniform.h"
26 
27 namespace spades {
28 	namespace draw {
29 		class GLRenderer;
30 		class GLProgramManager;
31 		class IGLShadowMapRenderer;
32 		struct GLShadowMapRenderParam;
33 		class GLShadowMapShader {
34 			GLProgramUniform projectionViewMatrix;
35 
36 		public:
37 			GLShadowMapShader();
~GLShadowMapShader()38 			~GLShadowMapShader() {}
39 
40 			static std::vector<GLShader *> RegisterShader(GLProgramManager *);
41 
42 			static IGLShadowMapRenderer *CreateShadowMapRenderer(GLRenderer *);
43 
44 			/** setups shadow map shader.
45 			 * note that this function sets the current active texture
46 			 * stage to the returned texture stage.
47 			 * @param firstTexStage first available texture stage.
48 			 * @return next available texture stage */
49 			int operator()(GLRenderer *renderer, GLProgram *, int firstTexStage);
50 		};
51 	}
52 }