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 "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         if(level>=levels || z>=depth)
  21                 throw out_of_range("Texture2DArray::layer_image");
  22
  23         LinAl::Vector<unsigned, 3> size = get_level_size(level);
  24         sub_image(level, 0, 0, z, size.x, size.y, 1, data);
  25 }
  26
  27 void Texture2DArray::layer_image(unsigned level, unsigned z, PixelComponents comp, DataType type, const void *data)
  28 {
  29         if(comp!=get_components(format) || type!=get_component_type(format))
  30                 throw incompatible_data("Texture2DArray::layer_image");
  31         layer_image(level, z, data);
  32 }
  33
  34 void Texture2DArray::layer_image(unsigned level, unsigned z, const Graphics::Image &img)
  35 {
  36         if(!get_width())
  37                 throw invalid_operation("Texture2DArray::layer_image");
  38
  39         unsigned w = img.get_width();
  40         unsigned h = img.get_height();
  41         if(w!=get_width() || h!=get_height())
  42                 throw incompatible_data("Texture2DArray::layer_image");
  43         PixelFormat fmt = pixelformat_from_image(img);
  44         if(get_components(fmt)!=get_components(format) || get_component_type(fmt)!=get_component_type(format))
  45                 throw incompatible_data("Texture2DArray::layer_image");
  46
  47         PixelStore pstore = PixelStore::from_image(img);
  48         BindRestore _bind_ps(pstore);
  49
  50         layer_image(level, z, img.get_pixels());
  51 }
  52
  53
  54 Texture2DArray::Loader::Loader(Texture2DArray &t):
  55         DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t)
  56 {
  57         init();
  58 }
  59
  60 Texture2DArray::Loader::Loader(Texture2DArray &t, Collection &c):
  61         DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t, c)
  62 {
  63         init();
  64 }
  65
  66 void Texture2DArray::Loader::init()
  67 {
  68         add("external_image", &Loader::external_image);
  69 }
  70
  71 void Texture2DArray::Loader::external_image(unsigned z, const string &fn)
  72 {
  73         Graphics::Image img;
  74         load_external_image(img, fn);
  75         obj.layer_image(0, z, img);
  76 }
  77
  78 } // namespace GL
  79 } // namespace Msp