PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/textures/imagemap.h
00001 
00002 /*
00003     pbrt source code Copyright(c) 1998-2012 Matt Pharr and Greg Humphreys.
00004 
00005     This file is part of pbrt.
00006 
00007     Redistribution and use in source and binary forms, with or without
00008     modification, are permitted provided that the following conditions are
00009     met:
00010 
00011     - Redistributions of source code must retain the above copyright
00012       notice, this list of conditions and the following disclaimer.
00013 
00014     - Redistributions in binary form must reproduce the above copyright
00015       notice, this list of conditions and the following disclaimer in the
00016       documentation and/or other materials provided with the distribution.
00017 
00018     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
00019     IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
00020     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00021     PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
00022     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00023     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00024     LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00025     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00026     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00027     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00028     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029 
00030  */
00031 
00032 #if defined(_MSC_VER)
00033 #pragma once
00034 #endif
00035 
00036 #ifndef PBRT_TEXTURES_IMAGEMAP_H
00037 #define PBRT_TEXTURES_IMAGEMAP_H
00038 
00039 // textures/imagemap.h*
00040 #include "pbrt.h"
00041 #include "texture.h"
00042 #include "mipmap.h"
00043 #include "paramset.h"
00044 #include <map>
00045 
00046 // TexInfo Declarations
00047 struct TexInfo {
00048     TexInfo(const string &f, bool dt, float ma, ImageWrap wm, float sc, float ga)
00049         : filename(f), doTrilinear(dt), maxAniso(ma), wrapMode(wm), scale(sc), gamma(ga) { }
00050     string filename;
00051     bool doTrilinear;
00052     float maxAniso;
00053     ImageWrap wrapMode;
00054     float scale, gamma;
00055     bool operator<(const TexInfo &t2) const {
00056         if (filename != t2.filename) return filename < t2.filename;
00057         if (doTrilinear != t2.doTrilinear) return doTrilinear < t2.doTrilinear;
00058         if (maxAniso != t2.maxAniso) return maxAniso < t2.maxAniso;
00059         if (scale != t2.scale) return scale < t2.scale;
00060         if (gamma != t2.gamma) return gamma < t2.gamma;
00061         return wrapMode < t2.wrapMode;
00062     }
00063 };
00064 
00065 
00066 
00067 // ImageTexture Declarations
00068 template <typename Tmemory, typename Treturn>
00069     class ImageTexture : public Texture<Treturn> {
00070 public:
00071     // ImageTexture Public Methods
00072     ImageTexture(TextureMapping2D *m, const string &filename, bool doTri,
00073                  float maxAniso, ImageWrap wm, float scale, float gamma);
00074     Treturn Evaluate(const DifferentialGeometry &) const;
00075     ~ImageTexture();
00076     static void ClearCache() {
00077         typename std::map<TexInfo, MIPMap<Tmemory> *>::iterator iter;
00078         iter = textures.begin();
00079         while (iter != textures.end()) {
00080             delete iter->second;
00081             ++iter;
00082         }
00083         textures.erase(textures.begin(), textures.end());
00084     }
00085 private:
00086     // ImageTexture Private Methods
00087     static MIPMap<Tmemory> *GetTexture(const string &filename,
00088         bool doTrilinear, float maxAniso, ImageWrap wm, float scale, float gamma);
00089     static void convertIn(const RGBSpectrum &from, RGBSpectrum *to,
00090                           float scale, float gamma) {
00091         *to = Pow(scale * from, gamma);
00092     }
00093     static void convertIn(const RGBSpectrum &from, float *to,
00094                           float scale, float gamma) {
00095         *to = powf(scale * from.y(), gamma);
00096     }
00097     static void convertOut(const RGBSpectrum &from, Spectrum *to) {
00098         float rgb[3];
00099         from.ToRGB(rgb);
00100         *to = Spectrum::FromRGB(rgb);
00101     }
00102     static void convertOut(float from, float *to) {
00103         *to = from;
00104     }
00105 
00106     // ImageTexture Private Data
00107     MIPMap<Tmemory> *mipmap;
00108     TextureMapping2D *mapping;
00109     static std::map<TexInfo, MIPMap<Tmemory> *> textures;
00110 };
00111 
00112 
00113 ImageTexture<float, float> *CreateImageFloatTexture(const Transform &tex2world,
00114         const TextureParams &tp);
00115 ImageTexture<RGBSpectrum, Spectrum> *CreateImageSpectrumTexture(const Transform &tex2world,
00116         const TextureParams &tp);
00117 
00118 #endif // PBRT_TEXTURES_IMAGEMAP_H