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

Benoit Jacob bjacob at mozilla.com
Wed Jan 19 09:18:56 PST 2011

----- Original Message -----
> It looks like a number of failures are happening because WebGL is
> assuming GL_ARB_ES2_compatibility support in the OpenGL driver when
> the extension isn't actually present. Mesa generates an error and the
> test fails.

Thanks a lot! That also seems to explain failures I'm having on various platforms, and couldn't figure out.

We don't want to require GL_ARB_ES2_compatibility. So i'll try to see how I can emulate this functionality on desktop OpenGL.


> For example, WebGL is calling
> glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_VECTORS) and Mesa is generating
> GL_INVALID_ENUM. The gl-get-calls test is marked as failing.
> If GL_ARB_ES2_compatibility is a hard requirement for WebGL, there
> should be a check for it. Do you know what the story is here?
> I haven't dug into many of the failures, but a lot of GL errors are
> being generated by Mesa because of invalid indexes when trying to
> set/query GLSL uniforms, etc. That seems suspicious too.
> Eric Anholt has started adding support for GL_ARB_ES2_compatibility in
> Mesa but it's not enabled for many drivers yet. I could work on
> enabling it for the swrast and gallium drivers.
> -Brian

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