On Thursday 08 February 2001 8:02 am, Gerd Knorr wrote:
> It can be both overlay (with the bt848 writing yuv to offscreen
> memory, the gfx card setting up an overlay and filling the window
> with the chromakey color) and direct transfer of rgb data to the
> visible area of the framebuffer.
It's pot luck though that determines that, not the Xv API.
The api doesn't say "RGB isn't a hardware overlay" and, on a card like
the Voodoo3 for example, it can do RGB into hardware overlay.
Picking RGB instead of YUV is a pixel format decision not a decision as
to where the pixels are sent...(even though most current drivers put
RGB into the onscreen buffer you can't rely on that)
--
Michael.
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