/*
 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 <cstdint>
#include <cstdint>
#include <vector>

#include "GLFramebufferManager.h"
#include "IGLDevice.h"

namespace spades {
	namespace draw {
		class GLRenderer;
		class GLProgram;
		class GLImage;
		class GLLensDustFilter {
			GLProgram *thru;
			GLProgram *dust;
			GLProgram *gauss1d;
			GLImage *dustImg;
			GLRenderer *renderer;
			IGLDevice::UInteger noiseTex;
			std::vector<uint32_t> noise;
			GLColorBuffer DownSample(GLColorBuffer, bool linearize = false);
			GLColorBuffer GaussianBlur(GLColorBuffer, bool vertical);
			void UpdateNoise();

		public:
			GLLensDustFilter(GLRenderer *);
			~GLLensDustFilter();
			GLColorBuffer Filter(GLColorBuffer);
		};
	}
}