Fw: radeon driver GLX pixmap support

[Michel Dänzer]

On Mon, 2008-02-11 at 13:53 -0500, Stephen Winiecki wrote:
> Michel Dänzer <michel at tungstengraphics.com> wrote on 02/11/2008 11:19:26 
> AM:
> 
> > On Mon, 2008-02-11 at 10:58 -0500, Stephen Winiecki wrote:
> > > Michel Dänzer <michel at tungstengraphics.com> wrote on 02/11/2008 
> 08:18:30 
> > > AM:
> > > 
> > > > On Fri, 2008-02-08 at 16:34 -0500, Stephen Winiecki wrote: 
> > > > > It is my understanding that the current open source radeon driver 
> does 
> > > not 
> > > > > have GLX pixmap support, but it is being worked on?  Can someone 
> > > provide 
> > > > > status or a pointer to discussion of this support being added?
> > > > 
> > > > The biggest roadblock is the pending DRI2 rework, and porting the 
> radeon
> > > > driver(s) to it.
> > > 
> > > Thanks for your response.  Can you provide a bit more detail on the 
> actual 
> > > issue?  Are you saying that without the new DRI2 implementation this 
> > > function cannot be supported by the driver? 
> > 
> > Exactly.
> 
> OK - Thanks.  I've looked and wasn't able to find any info on the issue of 
> the missing pixmap support.  Is there any specific discusion on it you are 
> aware of and can point to?  Is it part of a DRI2 definition/discussion?

See e.g.
http://dri.freedesktop.org/wiki/DirectRenderingToRedirectedWindows
(rendering to a redirected window is similar to rendering to a GLXPixmap
from the implementation POV) or http://wiki.x.org/wiki/DRI2 or anything
related to DRI2.


> Now running into something else.  With DRI enabled, getting the following 
> error with the testcase (essentially just creating a window) for both 
> modes:
> 
> libGL warning: 3D driver claims to not support visual 0x4b
> X Error of failed request:  BadMatch (invalid parameter attributes)
>   Major opcode of failed request:  1 (X_CreateWindow)

See the XCreateWindow manpage for the conditions under which it returns
a BadMatch error. Maybe you're specifying depth 32 instead of 24 or vice
versa, or the wrong visual type?


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer