On Thu, Aug 16, 2018 at 10:39 PM Matt Turner <[email protected]> wrote:
> On Thu, Aug 16, 2018 at 5:50 PM Jason Ekstrand <[email protected]> > wrote: > > If that's true then the extension makes no sense other than maybe "we're > a > > UMA, we can make things cheap." I think it's more likely that the > intention > > is to use a fenced map through the GTT to do the detiling. That said, > given > > how sketchy GTT maps are, it's still a pretty questionable extension at > > best and something we don't want to commit to going forward. > > Why are you speculating about it instead of just reading the extension? > Replying to e-mails from my phone? I know, not a good excuse. > > https://www.khronos.org/registry/OpenGL/extensions/INTEL/INTEL_map_texture.txt > > This extension allows to create textures with 'linear' layout which > allows > for simplified access on user side (potentially sacrificing some > performance during texture sampling). > Yeah, that's pretty bad. I mean, there probably are uses such as if you're doing piles of CPU-side rendering. If someone really badly wants that trade-off, maybe it's worth implementing but I'm still a skeptic. --Jason
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