[wayland] radeon r200 and "egl_dri2: add swrast" (mesa-from-git)?

[Kristian Høgsberg]

On Fri, Feb 18, 2011 at 9:29 AM, Russell Shaw <rjshaw at netspace.net.au> wrote:
> On 18/02/11 03:31, Kristian Høgsberg wrote:
>>
>> On Thu, Feb 17, 2011 at 2:51 AM, Sedat Dilek<sedat.dilek at googlemail.com>
>>  wrote:
>>>
>>> Hi,
>>>
>>> I tried to jump on the Wayland train at the end of last year, but my
>>> radeon r200 is/was not the ideal hardware platform.
>>>
>>> Today, while checking mesa-from-git, I saw the commit "egl_dri2: add
>>> swrast" [1].
>>> I remember Chia-I Wu told me to wait for swrast EGL support.
>>>
>>> Thus my question:
>>> Do people like me have now a chance to see a ("stable") wayland (even
>>> a demo) on their screens?
>>
>> I don't think swrast mesa is the right way to go for a un-accelerated
>> Wayland server.  It is possible to do this with the shm buffer sharing
>> and swrast, but a better approach is to not use GL at all if there's
>> no acceleration available.  A cairo (or just pixman directly) based
>> compositor could probably provide a pretty decent performance.
>>
>>> Next question:
>>> (If Yes) What does the autogen/configure line have to look like?
>>
>> There are still missing pieces, it's not just a matter of configure
>> mesa and wayland, sorry.
>
> How do i get a linear frame buffer without needing cairo or openGL?

Have a look at modetest.c from the drm repo:

http://cgit.freedesktop.org/mesa/drm/tree/tests/modetest/modetest.c

Kristian