+ throw invalid_operation("Texture3D::storage");
+ if(wd==0 || ht==0 || dp==0)
+ throw invalid_argument("Texture3D::storage");
+
+ set_internal_format(fmt);
+ width = wd;
+ height = ht;
+ depth = dp;
+ levels = get_n_levels();
+ if(lv>0)
+ levels = min(levels, lv);
+}
+
+void Texture3D::allocate(unsigned level)
+{
+ if(width==0 || height==0 || depth==0)
+ throw invalid_operation("Texture3D::allocate");
+ if(level>=levels)
+ throw invalid_argument("Texture3D::allocate");
+ if(allocated&(1<<level))
+ return;
+
+ if(ARB_texture_storage)
+ {
+ if(ARB_direct_state_access)
+ glTextureStorage3D(id, levels, ifmt, width, height, depth);
+ else
+ {
+ BindRestore _bind(this);
+ glTexStorage3D(target, levels, ifmt, width, height, depth);
+ }
+ allocated |= (1<<levels)-1;
+ }
+ else
+ {
+ PixelFormat base_fmt = get_base_pixelformat(ifmt);
+ image(level, base_fmt, get_alloc_type(base_fmt), 0);
+ }
+}
+
+void Texture3D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
+{
+ if(width==0 || height==0 || depth==0)
+ throw invalid_operation("Texture3D::image");
+
+ unsigned w = width;
+ unsigned h = height;
+ unsigned d = depth;
+ get_level_size(level, w, h, d);