Internally iOS double-buffers its rendering using copy instead of flipping,
so we reported that our context was single-buffered so that clients could
take advantage of the unchanged buffer. This failed when clients (such as
Qt itself) then assumed that calling swapBufferes() was not needed.
We now properly report that we're double-buffered, and we'll have to find
another way to report the way double-buffering works if that's still an
optimization we'd like to provide to clients.
Change-Id: Id2e4faa68ed3b837ad01d6f22b2927fc9c9769c2
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
02e406ac50