Khronos public bugtracker – Bug 712
4.3 core spec references CopyPixels.
Last modified: 2016-06-19 01:03:19 PDT
On page 190 (folio page numbers, not PDF page numbers), it states:
> The image is taken from the framebuffer exactly as if these arguments were passed to CopyPixels (see section 18.3)
There is no "CopyPixels" in section 18.3 of the core specification.