[Mesa-dev] [PATCH 13/14] mesa: Split the shader texture update logic from fixed function.

[Brian Paul]

On 04/25/2014 12:07 PM, Eric Anholt wrote:
> Marek Olšák <maraeo at gmail.com> writes:
>
>> Have you considered disabling creating the fallback textures for
>> hardware which can return the correct constant for a texture fetch if
>> a texture isn't bouńd?
>
> No, I hadn't.  Given that nobody ever intentionally executes with a
> fallback texture, do we care to reduce its overhead?

FWIW, years ago there was a GL screensaver program that rendered with an 
incomplete texture state and relied on correctly handling of that to 
produce the right image.  That would hit the fallback texture code.

I notified the author of the program about the issue back then.  In any 
case, I wouldn't worry about it.

-Brian