[Mesa-dev] WebGL test suite, and whitelisting drivers / OpenGL implementations in Firefox

Benoit Jacob bjacob at mozilla.com
Mon Jan 17 06:21:30 PST 2011

On 01/17/2011 09:13 AM, Alex Buell wrote:
> On Mon, 2011-01-17 at 08:57 -0500, Benoit Jacob wrote:
>> On 01/17/2011 08:28 AM, Alex Buell wrote:
>> There are two possible reasons for this.
>>    * first, can you please go to about:config and check that
>> webgl.enabled_for_all_sites is true.
>>    * otherwise, that means that WebGL contexts fail to initialize. We
>> require OpenGL 2.1, and once we get a OpenGL context, we perform a few
>> basic tests for e.g. the number of texture image units.
>> Do you see any error message in the terminal, or in Firefox's error
>> consosle (Ctrl+Shift+J) ?
>>> I guess Gentoo needs to add OSMesa to their list of packages to
>>> test.
>> If you want to use OSMesa for WebGL rendering, you need to let Firefox
>> know about the library filename by going to about:config and setting
>> webgl.osmesalib (for example libOSMesa.so.6)
> Following advice from Gentoo, I used the following:
> -no-remote
> WebGL is definitely enabled, now when I load the URL FF4 crashes with
> the following error:
> "failed to create drawable"
> I'm definitely running Gallium 0.4 on llvmpipe, and Mesa 7.10 (OpenGL
> 2.1)

This is reminiscent of

which seems to be a 3-fold problem, with 2 problems on the Xorg side and 
1 bug on Mozilla siden

bug 1, Xorg side: the "failed to create drawable" error itself
bug 2, Mozilla side: we fail to properly catch this error, working on 
this, we shouldn't try to continue with such an error
bug 3, Xorg side: shouldn't crash


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