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!=n_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         unsigned size = max(width, height);
  30         if(!is_array())
  31                 size = max(size, depth);
  32         n_levels = count_levels(size);
  33         if(lv>0)
  34                 n_levels = min(n_levels, lv);
  35
  36         allocate();
  37 }
  38
  39 void Texture3D::image(unsigned level, const void *data)
  40 {
  41         LinAl::Vector<unsigned, 3> size = get_level_size(level);
  42         return sub_image(level, 0, 0, 0, size.x, size.y, size.z, data);
  43 }
  44
  45 void Texture3D::sub_image(unsigned level, unsigned x, unsigned y, unsigned z, unsigned wd, unsigned ht, unsigned dp, const void *data)
  46 {
  47         if(width==0 || height==0 || depth==0)
  48                 throw invalid_operation("Texture3D::sub_image");
  49         if(level>=n_levels || x>width || x+wd>width || y>height || y+ht>height || z>depth || z+dp>depth)
  50                 throw out_of_range("Texture3D::sub_image");
  51
  52         Texture3DBackend::sub_image(level, x, y, z, wd, ht, dp, data);
  53 }
  54
  55 void Texture3D::image(const Graphics::Image &img, unsigned lv)
  56 {
  57         unsigned w = img.get_width();
  58         unsigned h = img.get_height();
  59
  60         if(h%w)
  61                 throw incompatible_data("Texture3D::load_image");
  62         unsigned d = h/w;
  63         h = w;
  64
  65         storage(pixelformat_from_image(img, use_srgb_format), w, h, d, lv);
  66         image(0, img.get_pixels());
  67 }
  68
  69 LinAl::Vector<unsigned, 3> Texture3D::get_level_size(unsigned level) const
  70 {
  71         unsigned w = width>>level;
  72         unsigned h = height>>level;
  73         unsigned d = depth;
  74         if(!is_array())
  75                 d >>= level;
  76
  77         if(!w && (h || d))
  78                 w = 1;
  79         if(!h && (w || d))
  80                 h = 1;
  81         if(!d && (w || h))
  82                 d = 1;
  83
  84         return LinAl::Vector<unsigned, 3>(w, h, d);
  85 }
  86
  87
  88 Texture3D::Loader::Loader(Texture3D &t):
  89         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
  90 {
  91         init();
  92 }
  93
  94 Texture3D::Loader::Loader(Texture3D &t, Collection &c):
  95         DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
  96 {
  97         init();
  98 }
  99
 100 void Texture3D::Loader::init()
 101 {
 102         add("storage", &Loader::storage);
 103         add("storage", &Loader::storage_levels);
 104 }
 105
 106 void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
 107 {
 108         obj.storage(fmt, w, h, d);
 109 }
 110
 111 void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
 112 {
 113         obj.storage(fmt, w, h, d, l);
 114 }
 115
 116 } // namespace GL
 117 } // namespace Msp