Is XAA still supported in recent and future xserver?

[Michael]

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Hello,

On Sep 13, 2010, at 4:30 PM, Mark Kettenis wrote:

>> From: Mikhail Gusarov <dottedmag at dottedmag.net>
>> Date: Tue, 14 Sep 2010 02:29:19 +0700
>>
>> Twas brillig at 21:17:52 13.09.2010 UTC+02 when mark.kettenis at 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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