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, 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, data);
  26 }
  27
  28 void Texture2DArray::layer_image(unsigned level, unsigned z, PixelComponents comp, DataType type, const void *data)
  29 {
  30         if(comp!=get_components(format) || type!=get_component_type(format))
  31                 throw incompatible_data("Texture2DArray::layer_image");
  32         layer_image(level, z, data);
  33 }
  34
  35 void Texture2DArray::layer_image(unsigned level, unsigned z, const Graphics::Image &img)
  36 {
  37         if(!get_width())
  38                 throw invalid_operation("Texture2DArray::layer_image");
  39
  40         unsigned w = img.get_width();
  41         unsigned h = img.get_height();
  42         if(w!=get_width() || h!=get_height())
  43                 throw incompatible_data("Texture2DArray::layer_image");
  44         PixelFormat fmt = pixelformat_from_image(img);
  45         if(get_components(fmt)!=get_components(format) || get_component_type(fmt)!=get_component_type(format))
  46                 throw incompatible_data("Texture2DArray::layer_image");
  47
  48         PixelStore pstore = PixelStore::from_image(img);
  49         BindRestore _bind_ps(pstore);
  50
  51         layer_image(level, z, img.get_pixels());
  52 }
  53
  54
  55 Texture2DArray::Loader::Loader(Texture2DArray &t):
  56         DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t)
  57 {
  58         init();
  59 }
  60
  61 Texture2DArray::Loader::Loader(Texture2DArray &t, Collection &c):
  62         DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t, c)
  63 {
  64         init();
  65 }
  66
  67 void Texture2DArray::Loader::init()
  68 {
  69         add("external_image", &Loader::external_image);
  70 }
  71
  72 void Texture2DArray::Loader::external_image(unsigned z, const string &fn)
  73 {
  74         Graphics::Image img;
  75         load_external_image(img, fn);
  76         obj.layer_image(0, z, img);
  77 }
  78
  79 } // namespace GL
  80 } // namespace Msp