[Mesa-dev] [PATCH 1/6] tgsi: add TXQ support.

[Dave Airlie]

On Thu, Aug 25, 2011 at 2:43 PM, Keith Whitwell <keithw at vmware.com> wrote:
> On Thu, 2011-08-25 at 07:28 -0600, Brian Paul wrote:
>> How would the TXQ instruction be implemented for a hardware driver?
>>
>> Is there really a HW GPU instruction that returns the size of a texture?
>
> Yes, that's correct.
>
>> Otherwise, this seems like something we could implement in the state
>> tracker by putting the texture size into a constant buffer slot.  Then
>> we'd have it for all drivers.
>
> I think that's a good fallback for hardware that's missing this
> capability, but DX10+ hardware should be expected to have it.

I can't see us caring really, its part of GLSL1.30 which pretty muhc
means GL3.0, which pretty much means DX10.

Dave.