source/texture2darray.cpp

   1 #include <msp/datafile/collection.h>
   2 #include <msp/gl/extensions/ext_texture_array.h>
   3 #include "error.h"
   4 #include "pixelstore.h"
   5 #include "texture2darray.h"
   6
   7 using namespace std;
   8
   9 namespace Msp {
  10 namespace GL {
  11
  12 Texture2DArray::Texture2DArray():
  13         Texture3D(GL_TEXTURE_2D_ARRAY)
  14 {
  15         static Require _req(EXT_texture_array);
  16 }
  17
  18 void Texture2DArray::layer_image(unsigned level, unsigned z, PixelFormat fmt, DataType type, const void *data)
  19 {
  20         unsigned w = get_width();
  21         unsigned h = get_height();
  22         unsigned d = get_depth();
  23         get_level_size(level, w, h, d);
  24
  25         sub_image(level, 0, 0, z, w, h, 1, fmt, type, data);
  26 }
  27
  28 void Texture2DArray::layer_image(unsigned level, unsigned z, const Graphics::Image &img)
  29 {
  30         if(!get_width())
  31                 throw invalid_operation("Texture2DArray::layer_image");
  32
  33         unsigned w = img.get_width();
  34         unsigned h = img.get_height();
  35         PixelFormat fmt = pixelformat_from_graphics(img.get_format());
  36         if(w!=get_width() || h!=get_height())
  37                 throw incompatible_data("Texture2DArray::layer_image");
  38
  39         PixelStore pstore = PixelStore::from_image(img);
  40         BindRestore _bind_ps(pstore);
  41
  42         layer_image(level, z, fmt, UNSIGNED_BYTE, img.get_data());
  43 }
  44
  45
  46 Texture2DArray::Loader::Loader(Texture2DArray &t):
  47         DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t)
  48 {
  49         init();
  50 }
  51
  52 Texture2DArray::Loader::Loader(Texture2DArray &t, Collection &c):
  53         DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t, c)
  54 {
  55         init();
  56 }
  57
  58 void Texture2DArray::Loader::init()
  59 {
  60         add("external_image", &Loader::external_image);
  61 }
  62
  63 void Texture2DArray::Loader::external_image(unsigned z, const string &fn)
  64 {
  65         Graphics::Image img;
  66         RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
  67         if(!io)
  68                 throw IO::file_not_found(fn);
  69         img.load_io(*io);
  70
  71         obj.layer_image(0, z, img);
  72 }
  73
  74 } // namespace GL
  75 } // namespace Msp