Implement 2D array textures

[libs/gl.git] / source / texture2darray.cpp

diff --git a/source/texture2darray.cpp b/source/texture2darray.cpp
new file mode 100644 (file)
index 0000000..27e0d53
--- /dev/null
+++ b/source/texture2darray.cpp
@@ -0,0 +1,73 @@
+#include <msp/datafile/collection.h>
+#include <msp/gl/extensions/ext_texture_array.h>
+#include "error.h"
+#include "pixelstore.h"
+#include "texture2darray.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+Texture2DArray::Texture2DArray():
+       Texture3D(GL_TEXTURE_2D_ARRAY)
+{
+       static Require _req(EXT_texture_array);
+}
+
+void Texture2DArray::layer_image(unsigned level, unsigned z, PixelFormat fmt, DataType type, const void *data)
+{
+       unsigned w = get_width();
+       unsigned h = get_height();
+       unsigned d = get_depth();
+       get_level_size(level, w, h, d);
+
+       sub_image(level, 0, 0, z, w, h, 1, fmt, type, data);
+}
+
+void Texture2DArray::layer_image(unsigned level, unsigned z, const Graphics::Image &img)
+{
+       if(!get_width())
+               throw invalid_operation("Texture2D::layer_image");
+
+       unsigned w = img.get_width();
+       unsigned h = img.get_height();
+       PixelFormat fmt = pixelformat_from_graphics(img.get_format());
+       if(w!=get_width() || h!=get_height())
+               throw incompatible_data("Texture2D::image");
+
+       PixelStore pstore = PixelStore::from_image(img);
+       BindRestore _bind_ps(pstore);
+
+       layer_image(level, z, fmt, UNSIGNED_BYTE, img.get_data());
+}
+
+
+Texture2DArray::Loader::Loader(Texture2DArray &t):
+       DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t)
+{
+       init();
+}
+
+Texture2DArray::Loader::Loader(Texture2DArray &t, Collection &c):
+       DataFile::DerivedObjectLoader<Texture2DArray, Texture3D::Loader>(t, c)
+{
+       init();
+}
+
+void Texture2DArray::Loader::init()
+{
+       add("external_image", &Loader::external_image);
+}
+
+void Texture2DArray::Loader::external_image(unsigned z, const string &fn)
+{
+       Graphics::Image img;
+       RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
+       img.load_io(*io);
+
+       obj.layer_image(0, z, img);
+}
+
+} // namespace GL
+} // namespace Msp