/*
 Copyright (c) 2015 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 "GLFramebufferManager.h"

namespace spades {
	namespace draw {
		class GLRenderer;
		class GLProgram;
		class GLAutoExposureFilter {
			GLProgram *thru;
			GLProgram *computeGain;
			GLProgram *preprocess;
			GLRenderer *renderer;
			
			// 1x1 of framebuffer that holds the scene brightness
			IGLDevice::UInteger exposureFramebuffer;
			IGLDevice::UInteger exposureTexture;
		public:
			GLAutoExposureFilter(GLRenderer *);
			~GLAutoExposureFilter();
			GLColorBuffer Filter(GLColorBuffer);
		};
	}
}