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         width(0),
  11         height(0)
  12 { }
  13
  14 Texture2D::~Texture2D()
  15 {
  16         set_manager(0);
  17 }
  18
  19 void Texture2D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned lv)
  20 {
  21         if(width>0)
  22         {
  23                 if(fmt!=format || wd!=width || ht!=height || (lv && lv!=levels))
  24                         throw incompatible_data("Texture2D::storage");
  25                 return;
  26         }
  27         if(wd==0 || ht==0)
  28                 throw invalid_argument("Texture2D::storage");
  29
  30         set_format(fmt);
  31         width = wd;
  32         height = ht;
  33         levels = get_n_levels();
  34         if(lv>0)
  35                 levels = min(levels, lv);
  36
  37         allocate();
  38 }
  39
  40 void Texture2D::image(unsigned level, const void *data)
  41 {
  42         LinAl::Vector<unsigned, 2> size = get_level_size(level);
  43         return sub_image(level, 0, 0, size.x, size.y, data);
  44 }
  45
  46 void Texture2D::sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht, const void *data)
  47 {
  48         if(width==0 || height==0)
  49                 throw invalid_operation("Texture2D::sub_image");
  50         if(level>=levels)
  51                 throw out_of_range("Texture2D::sub_image");
  52
  53         Texture2DBackend::sub_image(level, x, y, wd, ht, data);
  54 }
  55
  56 void Texture2D::image(const Graphics::Image &img, unsigned lv)
  57 {
  58         storage(pixelformat_from_image(img, use_srgb_format), img.get_width(), img.get_height(), lv);
  59         image(0, img.get_pixels());
  60 }
  61
  62 unsigned Texture2D::get_n_levels() const
  63 {
  64         unsigned n = 0;
  65         for(unsigned s=max(width, height); s; s>>=1, ++n) ;
  66         return n;
  67 }
  68
  69 LinAl::Vector<unsigned, 2> Texture2D::get_level_size(unsigned level) const
  70 {
  71         unsigned w = width>>level;
  72         unsigned h = height>>level;
  73
  74         if(!w && h)
  75                 w = 1;
  76         else if(!h && w)
  77                 h = 1;
  78
  79         return LinAl::Vector<unsigned, 2>(w, h);
  80 }
  81
  82 Resource::AsyncLoader *Texture2D::load(IO::Seekable &io, const Resources *)
  83 {
  84         return create_async_loader(io);
  85 }
  86
  87 uint64_t Texture2D::get_data_size() const
  88 {
  89         return id ? width*height*get_pixel_size(format) : 0;
  90 }
  91
  92
  93 Texture2D::Loader::Loader(Texture2D &t):
  94         DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>(t)
  95 {
  96         init();
  97 }
  98
  99 Texture2D::Loader::Loader(Texture2D &t, Collection &c):
 100         DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>(t, c)
 101 {
 102         init();
 103 }
 104
 105 void Texture2D::Loader::init()
 106 {
 107         add("raw_data", &Loader::raw_data);
 108         add("storage", &Loader::storage);
 109         add("storage", &Loader::storage_levels);
 110 }
 111
 112 void Texture2D::Loader::raw_data(const string &data)
 113 {
 114         if(obj.manager)
 115                 obj.set_manager(0);
 116         obj.image(0, data.data());
 117 }
 118
 119 void Texture2D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h)
 120 {
 121         obj.storage(fmt, w, h);
 122 }
 123
 124 void Texture2D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned l)
 125 {
 126         obj.storage(fmt, w, h, l);
 127 }
 128
 129 } // namespace GL
 130 } // namespace Msp