source/core/texture2d.cpp

   1 #include "error.h"
   2 #include "texture2d.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace GL {
   8
   9 Texture2D::~Texture2D()
  10 {
  11         set_manager(0);
  12 }
  13
  14 void Texture2D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned lv)
  15 {
  16         if(width>0)
  17         {
  18                 if(fmt!=format || wd!=width || ht!=height || (lv && lv!=levels))
  19                         throw incompatible_data("Texture2D::storage");
  20                 return;
  21         }
  22         if(wd==0 || ht==0)
  23                 throw invalid_argument("Texture2D::storage");
  24
  25         set_format(fmt);
  26         width = wd;
  27         height = ht;
  28         levels = get_n_levels();
  29         if(lv>0)
  30                 levels = min(levels, lv);
  31
  32         allocate();
  33 }
  34
  35 void Texture2D::image(unsigned level, const void *data)
  36 {
  37         LinAl::Vector<unsigned, 2> size = get_level_size(level);
  38         return sub_image(level, 0, 0, size.x, size.y, data);
  39 }
  40
  41 void Texture2D::sub_image(unsigned level, unsigned x, unsigned y, unsigned wd, unsigned ht, const void *data)
  42 {
  43         if(width==0 || height==0)
  44                 throw invalid_operation("Texture2D::sub_image");
  45         if(level>=levels || x>width || x+wd>width || y>height || y+ht>height)
  46                 throw out_of_range("Texture2D::sub_image");
  47
  48         Texture2DBackend::sub_image(level, x, y, wd, ht, data);
  49 }
  50
  51 void Texture2D::image(const Graphics::Image &img, unsigned lv)
  52 {
  53         storage(pixelformat_from_image(img, use_srgb_format), img.get_width(), img.get_height(), lv);
  54         image(0, img.get_pixels());
  55 }
  56
  57 unsigned Texture2D::get_n_levels() const
  58 {
  59         unsigned n = 0;
  60         for(unsigned s=max(width, height); s; s>>=1, ++n) ;
  61         return n;
  62 }
  63
  64 LinAl::Vector<unsigned, 2> Texture2D::get_level_size(unsigned level) const
  65 {
  66         unsigned w = width>>level;
  67         unsigned h = height>>level;
  68
  69         if(!w && h)
  70                 w = 1;
  71         else if(!h && w)
  72                 h = 1;
  73
  74         return LinAl::Vector<unsigned, 2>(w, h);
  75 }
  76
  77 Resource::AsyncLoader *Texture2D::load(IO::Seekable &io, const Resources *)
  78 {
  79         return create_async_loader(io);
  80 }
  81
  82 uint64_t Texture2D::get_data_size() const
  83 {
  84         return id ? width*height*get_pixel_size(format) : 0;
  85 }
  86
  87
  88 Texture2D::Loader::Loader(Texture2D &t):
  89         DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>(t)
  90 {
  91         init();
  92 }
  93
  94 Texture2D::Loader::Loader(Texture2D &t, Collection &c):
  95         DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>(t, c)
  96 {
  97         init();
  98 }
  99
 100 void Texture2D::Loader::init()
 101 {
 102         add("storage", &Loader::storage);
 103         add("storage", &Loader::storage_levels);
 104 }
 105
 106 void Texture2D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h)
 107 {
 108         obj.storage(fmt, w, h);
 109 }
 110
 111 void Texture2D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned l)
 112 {
 113         obj.storage(fmt, w, h, l);
 114 }
 115
 116 } // namespace GL
 117 } // namespace Msp