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Commit 784b03d4 authored by pippin's avatar pippin Committed by pippin
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gfx,py: rate limit overlays

Managing and rendering overlays is a large penalty to have per-frame,
ideally the overlays only re-render when there has been change, this
commit cuts the number of overlays re-renders in 8. And does the overlays
on top of the framebuffer. Before scanout a slice centered and from the top
down is composited over the framebuffer. When only icons are shown less
work is done. The maximum extent of the overlay covers the volume control
and icons. The debug overlay no longer is visible since it renders outside
the supported overlay area.
parent c3b0fc7e
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