00001 /*************************************************************************** 00002 * Copyright (C) 1998-2009 by authors (see AUTHORS.txt ) * 00003 * * 00004 * This file is part of LuxRender. * 00005 * * 00006 * Lux Renderer is free software; you can redistribute it and/or modify * 00007 * it under the terms of the GNU General Public License as published by * 00008 * the Free Software Foundation; either version 3 of the License, or * 00009 * (at your option) any later version. * 00010 * * 00011 * Lux Renderer is distributed in the hope that it will be useful, * 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00014 * GNU General Public License for more details. * 00015 * * 00016 * You should have received a copy of the GNU General Public License * 00017 * along with this program. If not, see <http://www.gnu.org/licenses/>. * 00018 * * 00019 * This project is based on PBRT ; see http://www.pbrt.org * 00020 * Lux Renderer website : http://www.luxrender.net * 00021 ***************************************************************************/ 00022 00023 // lineartonemap.h* 00024 #include "lux.h" 00025 #include "tonemap.h" 00026 #include "color.h" 00027 00028 namespace lux 00029 { 00030 00031 // MaxWhiteOp Declarations 00032 class LinearOp : public ToneMap { 00033 public: 00034 // LinearOp Public Methods 00035 LinearOp(float sensitivity, float exposure, float fstop, float gamma) : 00036 factor(exposure / (fstop * fstop) * sensitivity / 10.f * powf(118.f / 255.f, gamma)) { } 00037 virtual ~LinearOp() { } 00038 virtual void Map(vector<XYZColor> &xyz, int xRes, int yRes, float maxDisplayY) const { 00039 const int numPixels = xRes * yRes; 00040 for (int i = 0; i < numPixels; ++i) 00041 xyz[i] *= factor; 00042 } 00043 00044 static ToneMap *CreateToneMap(const ParamSet &ps); 00045 private: 00046 // LinearOp Private Data 00047 const float factor; 00048 }; 00049 00050 }//namespace lux 00051