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