[Piglit] [PATCH] tests/spec: ARB_debug_output fix false fail

Ian Romanick idr at freedesktop.org
Fri Sep 6 17:55:16 PDT 2013

On 09/06/2013 04:40 PM, Timothy Arceri wrote:
> On 07/09/13 04:40, Ian Romanick wrote:
>> On 09/06/2013 02:32 AM, Timothy Arceri wrote:
>>> Updates to the implementation after implementing KHR_debug means that
>>> either
>>> GL_DEBUG_OUTPUT needs to be enabled or CONTEXT_DEBUG_BIT bit set for
>>> the message
>>> log to be enabled.
>>> Signed-off-by: Timothy Arceri <t_arceri at yahoo.com.au>
>>> ---
>>>   tests/spec/arb_debug_output/api_error.c |    1 +
>>>   1 file changed, 1 insertion(+)
>>> diff --git a/tests/spec/arb_debug_output/api_error.c
>>> b/tests/spec/arb_debug_output/api_error.c
>>> index 61467c3..bd69965 100644
>>> --- a/tests/spec/arb_debug_output/api_error.c
>>> +++ b/tests/spec/arb_debug_output/api_error.c
>>> @@ -149,6 +149,7 @@ void piglit_init(int argc, char **argv)
>>>      piglit_require_extension("GL_ARB_debug_output");
>>> +   glEnable(GL_DEBUG_OUTPUT);
>> This needs to at least be guarded by 'if
>> (piglit_is_extension_supported("GL_KHR_debug"))'.  Otherwise, an
>> implementation that only supports the GL_ARB_debug_output (e.g.,
>> shipping Mesa 9.2 implementations) will generate a GL_INVALID_ENUM error
>> here.
> Yes I should have realised that. I've submitted a V2
>> I think we need to get a way in piglit to request a debug context, and
>> we should only expose this extension from Mesa in a debug context...
>> perhaps with an environment variable to over-ride.  The ARB_debug_output
>> spec even recommends this:
>>      "For performance reasons it is recommended, but not required, that
>>      implementations restrict supporting this extension only to
>>      contexts created using the debug flag as provided by
>>      WGL_create_context or GLX_create_context.  This extension places no
>>      limits on any other functionality provided by debug contexts through
>>      other extensions."
>> Perhaps Chad will have a suggestion for how to plumb that into piglit...
> I would assume this would possibly involve moving some code from
> test/spec/glx_arb_create_context into a piglit util type setup. I did
> start looking into this at one point but was a little unsure how to
> proceed, suggestions would be appreciated.

The real work would likely happen in Waffle, since that's where context
creation happens.  I suspect we'd add a config.context_flags mechanism,
or maybe config.debug_context (and config.forward_context?).


>>>      if (!piglit_check_gl_error(GL_NO_ERROR))
>>>         piglit_report_result(PIGLIT_FAIL);

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