[GEM-dev] Force Gem software rendering?

[IOhannes m zmoelnig]

Frank Barknecht wrote:
> Hallo,
> Claude Heiland-Allen hat gesagt: // Claude Heiland-Allen wrote:
> 
>> Frank Barknecht wrote:
>>> is there a way to force Gem to use software rendering, like with some
>>> environment variable? SW is currently the only way I'm able to use Gem
>>> on Matrox gfx cards (of course slowing them down even more, but at
>>> least I can see squares.)
>>>
>>> Ciao
>> https://sourceforge.net/tracker/?func=detail&aid=1908191&group_id=64325&atid=507082
>>
>> """"
>> you might have a look at driinfo, which claims to be able to set the DRI  
>> settings at runtime.
>> """"
> 
> Thanks for this pointer. Where can this driinfo be found? I only have glxinfo, which 
> just has this option:
> 
> -i      Force an indirect rendering context.

on some gfx-cards/drivers you might have luck by settings 
LIBGL_ALWAYS_INDIRECT=1


if this doesn't help, you could try to apply the following patch:

Index: GemWinCreateXWin.cpp
===================================================================
--- GemWinCreateXWin.cpp        (Revision 2761)
+++ GemWinCreateXWin.cpp        (Arbeitskopie)
@@ -228,7 +228,7 @@
    }
    // create the rendering context
    try {
-    info.context = glXCreateContext(info.dpy, vi, hints.shared, GL_TRUE);
+    info.context = glXCreateContext(info.dpy, vi, hints.shared, GL_FALSE);
    } catch(void*e){
      info.context=NULL;
    }



mfga.sdr
IOhannes

PS: i'll add this info to claude's feature-request
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