[Mesa-dev] [PATCH] Fix glGetInteger*(GL_SAMPLER_BINDING).

[Alan Hourihane]

On 03/06/13 18:36, Brian Paul wrote:
> On 03/06/2013 11:23 AM, Alan Hourihane wrote:
>> If the sampler object has been deleted on another context, an
>> alternative context may reference the old sampler. So ensure the sampler
>> object still exists.
>
> Alan, is this specified somewhere in a spec?  I can't find a 
> description of this behaviour and we don't do this for texture objects 
> or buffer objects, etc.

I can't see it specifically mentioned, apart from the note that when 
deleting the sampler object it should be unbound from the texture unit, 
and I did consider the case of buffer & texture objects whether to do 
this there too.

But getting the GL_SAMPLER_BINDING id when switching contexts and 
attempting to re-bind with glBindSampler() gives a GL error, which seems 
wrong to me.

I checked with the NVIDIA driver and no GL error is generated.

Alan.