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Hello,
On Sep 13, 2010, at 4:30 PM, Mark Kettenis wrote:
From: Mikhail Gusarov <dotted...@dottedmag.net>
Date: Tue, 14 Sep 2010 02:29:19 +0700
Twas brillig at 21:17:52 13.09.2010 UTC+02 when mark.kette...@xs4all.nl
did gyre and gimble:
so this means we could deprecate XAA from the server, and if one
cares about it we recommend to use old servers?
MK> No. XAA does make a noticable difference on some hardware.
deprecate != remove. There are lots of places in server where signs
"don't use this for new functionality" could be quite useful.
But I'm not sure XAA falls into that category. It is my understanding
that EXA doesn't make an awful lot of sense on hardware that doesn't
have alpha support. Such hardware may be mostly irrelevant in the
desktop market, but judging from the discussions on this list in the
last couple of months, such hardware continues to be used in the
embedded space.
Unlike XAA it has working offscreen pixmaps and it can accelerate
Xrender ops VRAM-to-VRAM ( XAA only supports CPU-to-VRAM with
acceleration). The biggest problem with EXA is that it's a pain in the
ass to make it work with hardware that doesn't support variable
strides, a lot of used-to-be high end and professional graphics
hardware falls into that category.
have fun
Michael
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