[Mesa-dev] [Bug 92552] [softpipe] piglit egl-create-context-valid-flag-forward-compatible-gl regression

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Oct 26 21:29:28 PDT 2015


https://bugs.freedesktop.org/show_bug.cgi?id=92552

--- Comment #10 from Matthew Waters <ystreet00 at gmail.com> ---
(In reply to Ian Romanick from comment #9)
> Comment on attachment 119006 [details] [review]
> egl: distnguish between unsupported api vs capabilities for EGL_CONTEXT_FLAGS
> 
> Review of attachment 119006 [details] [review]:
> -----------------------------------------------------------------
> 
> There are a few things wrong with this patch.  First, you can't check the
> version when you see EGL_CONTEXT_FLAGS in the attribs list because the
> application could specify the requested version after flags.  This should
> not generate an error:
> 
>     EGL_CONTEXT_FLAGS, EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR,
>     EGL_CONTEXT_CLIENT_VERSION, 3,
>     0

Right, will fix.

> Second, it is not correct to generate EGL_BAD_MATCH for
> EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR when
> EGL_EXT_create_context_robustness is not supported.  Think of it this way...
> if we deleted all support and knowledge of
> EGL_EXT_create_context_robustness, what error would be generated?  Default
> case in the switch statement says EGL_BAD_ATTRIBUTE.

Not sure what you're trying to say here.

Couple of interpretations:
1. Unknown bit in EGL_CONTEXT_FLAGS -> specs are pretty clear that
EGL_BAD_ATTRIBUTE should be returned
2. EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR is only defined for OpenGL contexts
(not ES) -> taken care of previously and will return EGL_BAD_ATTRIBUTE.
3. Removing support for EGL_EXT_create_context_robustness is not the same as
removing support for GL_ARB_robustness.  My question then is, do we have a way
we can check for GL_ARB_robustness from the egl code or is it always (not?)
supported?

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