00001 00002 /* 00003 pbrt source code Copyright(c) 1998-2007 Matt Pharr and Greg Humphreys. 00004 00005 This file is part of pbrt. 00006 00007 pbrt is free software; you can redistribute it and/or modify 00008 it under the terms of the GNU General Public License as published by 00009 the Free Software Foundation; either version 2 of the License, or 00010 (at your option) any later version. Note that the text contents of 00011 the book "Physically Based Rendering" are *not* licensed under the 00012 GNU GPL. 00013 00014 pbrt is distributed in the hope that it will be useful, 00015 but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00017 GNU General Public License for more details. 00018 00019 You should have received a copy of the GNU General Public License 00020 along with this program. If not, see <http://www.gnu.org/licenses/>. 00021 00022 */ 00023 00024 // maxwhite.cpp* 00025 #include "tonemap.h" 00026 // MaxWhiteOp Declarations 00027 class MaxWhiteOp : public ToneMap { 00028 public: 00029 // MaxWhiteOp Public Methods 00030 void Map(const float *y, int xRes, int yRes, 00031 float maxDisplayY, float *scale) const { 00032 // Compute maximum luminance of all pixels 00033 float maxY = 0.; 00034 for (int i = 0; i < xRes * yRes; ++i) 00035 maxY = max(maxY, y[i]); 00036 float s = maxDisplayY / maxY; 00037 for (int i = 0; i < xRes * yRes; ++i) 00038 scale[i] = s; 00039 } 00040 }; 00041 // MaxWhiteOp Method Definitions 00042 extern "C" DLLEXPORT ToneMap *CreateToneMap(const ParamSet &ps) { 00043 return new MaxWhiteOp; 00044 }