source/core/texture3d.cpp

   1 #include <cmath>
   2 #include "error.h"
   3 #include "texture3d.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace GL {
   9
  10 Texture3D::Texture3D(unsigned t):
  11         Texture3DBackend(t),
  12         width(0),
  13         height(0),
  14         depth(0)
  15 { }
  16
  17 Texture3D::Texture3D():
  18         width(0),
  19         height(0),
  20         depth(0)
  21 { }
  22
  23 void Texture3D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv)
  24 {
  25         if(width>0)
  26         {
  27                 if(fmt!=format || wd!=width || ht!=height || dp!=depth || (lv && lv!=levels))
  28                         throw incompatible_data("Texture3D::storage");
  29                 return;
  30         }
  31         if(wd==0 || ht==0 || dp==0)
  32                 throw invalid_argument("Texture3D::storage");
  33
  34         set_format(fmt);
  35         width = wd;
  36         height = ht;
  37         depth = dp;
  38         levels = get_n_levels();
  39         if(lv>0)
  40                 levels = min(levels, lv);
  41
  42         allocate();
  43 }
  44
  45 void Texture3D::image(unsigned level, const void *data)
  46 {
  47         LinAl::Vector<unsigned, 3> size = get_level_size(level);
  48         return sub_image(level, 0, 0, 0, size.x, size.y, size.z, data);
  49 }
  50
  51 void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
  52 {
  53         if(width==0 || height==0 || depth==0)
  54                 throw invalid_operation("Texture3D::sub_image");
  55         if(level>=levels)
  56                 throw out_of_range("Texture3D::sub_image");
  57
  58         Texture3DBackend::sub_image(level, x, y, z, wd, ht, dp, data);
  59 }
  60
  61 void Texture3D::image(const Graphics::Image &img, unsigned lv)
  62 {
  63         unsigned w = img.get_width();
  64         unsigned h = img.get_height();
  65
  66         if(h%w)
  67                 throw incompatible_data("Texture3D::load_image");
  68         unsigned d = h/w;
  69         h = w;
  70
  71         storage(pixelformat_from_image(img, use_srgb_format), w, h, d, lv);
  72         image(0, img.get_pixels());
  73 }
  74
  75 unsigned Texture3D::get_n_levels() const
  76 {
  77         unsigned s = max(width, height);
  78         if(!is_array())
  79                 s = max(s, depth);
  80         unsigned n = 0;
  81         for(; s; s>>=1, ++n) ;
  82         return n;
  83 }
  84
  85 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
  86 {
  87         unsigned w = width>>level;
  88         unsigned h = height>>level;
  89         unsigned d = depth;
  90         if(!is_array())
  91                 d >>= level;
  92
  93         if(!w && (h || d))
  94                 w = 1;
  95         if(!h && (w || d))
  96                 h = 1;
  97         if(!d && (w || h))
  98                 d = 1;
  99
 100         return LinAl::Vector<unsigned, 3>(w, h, d);
 101 }
 102
 103 uint64_t Texture3D::get_data_size() const
 104 {
 105         return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
 106 }
 107
 108
 109 Texture3D::Loader::Loader(Texture3D &t):
 110         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
 111 {
 112         init();
 113 }
 114
 115 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
 116         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
 117 {
 118         init();
 119 }
 120
 121 void Texture3D::Loader::init()
 122 {
 123         add("raw_data", &Loader::raw_data);
 124         add("storage", &Loader::storage);
 125         add("storage", &Loader::storage_levels);
 126 }
 127
 128 void Texture3D::Loader::raw_data(const string &data)
 129 {
 130         obj.image(0, data.data());
 131 }
 132
 133 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 134 {
 135         obj.storage(fmt, w, h, d);
 136 }
 137
 138 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 139 {
 140         obj.storage(fmt, w, h, d, l);
 141 }
 142
 143 } // namespace GL
 144 } // namespace Msp