ConstReadonlyHasGamepad: 1Gamepad support is available and a gamepad is connected.
ReadonlyHasMouseCursors: 2Backend can honor requested OS mouse cursor shapes.
ReadonlyHasSetMousePos: 4Backend can honor IO.WantSetMousePos requests.
ReadonlyNone: 0No optional backend capabilities reported.
ReadonlyRendererHasVtxOffset: 8Renderer supports VtxOffset for meshes beyond 64K with 16-bit indices.
Capabilities reported by the platform and renderer backends.