Two minor features are required for the blitFramebuffer implementation in OpenGL ES 3: - lockStencil with x,y coordinates - getting the stencil format (new getStencilFormat function) Change-Id: I83ccccefe70dbbedd05b5d82bc75d30f689c4abe Reviewed-on: https://swiftshader-review.googlesource.com/7490Tested-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Nicolas Capens <capn@google.com>
