The Copy Texture Extension

The Copy Texture Extension

The copy texture extension, EXT_copy_texture, lets you load texture images directly from the framebuffer. You can replace either part of the texture image or the whole image. If your system supports the 3D texture extension, you can also load 2D slices of a 3D texture from the framebuffer. You can't load an entire 3D texture because the framebuffer is 2D.

Why Use the Copy Texture Extension?
Copying Texture Images
New Functions