[Xquartz-dev] Tiger: OpenGL problem with stereo visuals with AppleSGLX-55

[Martin Otte]

Hi,

With LIBGL_ALLOW_SOFTWARE=1, I still get:

 > env LIBGL_ALLOW_SOFTWARE=1 LIBGL_DIAGNOSTIC=1 glxgears -stereo
initializing libGL in apple_init_glx
DIAG: CGL major 1 minor 0
DIAG: Software rendering is not being excluded.  Not using  
kCGLPFAAccelerated.
error: invalid pixel format
X Error of failed request:  GLXBadContext
   Major opcode of failed request:  0 ()
   Serial number of failed request:  22
   Current serial number in output stream:  22


Martin


On Mar 25, 2009, at 1:16 PM, George Peter Staplin wrote:

> Quoted Martin Otte <otte at duke.edu>:
>
>> Using AppleSGLX-55 and xorg-server-1.4.2-apple37 from macports, I can
>> now compile a working X-server with accelerated OpenGL on Tiger.
>>
>> The only difference I noted compared to the system X11 is that  a glx
>> program which tries to use  a stereo visual crashes. I can replicate
>> the same crash with glxgears -stereo:
>>
>>> env LIBGL_DIAGNOSTIC=1 glxgears -stereo
>> initializing libGL in apple_init_glx
>> DIAG: CGL major 1 minor 0
>> error: invalid pixel format
>> X Error of failed request:  GLXBadContext
>>   Major opcode of failed request:  0 ()
>>   Serial number of failed request:  22
>>   Current serial number in output stream:  22
>>
>> So far, this is the only problem that I have experienced with
>> xorg-server-1.4.2-apple37 on Tiger.
>>
>> Thanks for the Tiger support,
>> Martin
>
> Can you try adding: LIBGL_ALLOW_SOFTWARE=1 ?  I'm not sure if 55  
> had that though.  That could allow the stereo pixel format to  
> work.  It could also be that a shared context is involved.  There  
> are some restrictions with shared contexts that CGL adds, that X11  
> implementations usually don't.
>
> As I understand it, some changes that Jeremy made to force  
> accelerated renderers by default in AppleSGLX also made more shared  
> contexts work.
>
>
> George
> -- 
> http://people.freedesktop.org/~gstaplin/
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