openspades/Sources/Draw/GLShadowShader.h

/*
 Copyright (c) 2013 yvt

 This file is part of OpenSpades.

 OpenSpades is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 OpenSpades is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with OpenSpades.  If not, see <http://www.gnu.org/licenses/>.

 */

#pragma once

#include <vector>

#include "GLProgramUniform.h"

namespace spades {
	namespace draw {
		class GLRenderer;
		class GLProgramManager;
		class GLSettings;
		class GLShadowShader {
			GLProgramUniform eyeOrigin;
			GLProgramUniform eyeFront;
			GLProgramUniform mapShadowTexture;
			GLProgramUniform fogColor;
			GLProgramUniform ambientColor;
			GLProgramUniform shadowMapViewMatrix;
			GLProgramUniform shadowMapTexture1;
			GLProgramUniform shadowMapTexture2;
			GLProgramUniform shadowMapTexture3;
			GLProgramUniform shadowMapMatrix1;
			GLProgramUniform shadowMapMatrix2;
			GLProgramUniform shadowMapMatrix3;
			GLProgramUniform ambientShadowTexture;
			GLProgramUniform radiosityTextureFlat;
			GLProgramUniform radiosityTextureX;
			GLProgramUniform radiosityTextureY;
			GLProgramUniform radiosityTextureZ;
			GLProgramUniform pagetableSize;
			GLProgramUniform pagetableSizeInv;
			GLProgramUniform minLod;
			GLProgramUniform shadowMapSizeInv;

			GLProgramUniform ssaoTexture;
			GLProgramUniform ssaoTextureUVScale;

		public:
			GLShadowShader();
			~GLShadowShader() {}

			static std::vector<GLShader *> RegisterShader(GLProgramManager *, GLSettings &,
			                                              bool variance = false,
			                                              bool skipSSAO = false);

			/** setups shadow shader.
			 * note that this function sets the current active texture
			 * stage to the returned texture stage.
			 * @param firstTexStage first available texture stage.
			 * @return next available texture stage */
			int operator()(GLRenderer *renderer, GLProgram *, int firstTexStage);
		};
	}
}