source/core/texture2darray.cpp

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