XAA vs. EXA in old hardware support
macallan at netbsd.org
Fri Jun 16 10:58:06 PDT 2006
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just a stupid question - a while ago I wrote an XFree86 driver for the
Weitek P9100 graphics chip found in Tadpole SPARCbook 3GX and similar
laptops. ( the P9100 driver in XFree86 3.x wasn't really helpful - this
P9100 has an SBus interface and does a few things rather differently.
It also lacks the VGA part. )
So the question is - the driver of course uses XAA primitives. Should I
bother with EXA when porting it over to xorg? There is no hardware
support for alpha-blending or anything like that - just plain old
rectangles, area copies, lines, clipping, colour expansion.
The same goes for suncg6 - I added support for most of the hardware
acceleration these old critters offer ( didn't bother with pattern
fills but that's trivial to add ).
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