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