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.
--Jason
On August 16, 2018 13:02:50 Ian Romanick <[email protected]> wrote:
My recollection is that we never implemented this because it required
linear textures instead of tiled textures. In every speed test we did,
the read performance of tiled textures was so much better than the read
performance of linear textures that it seemed unlikely to be a benefit.
Instead, we chose to spend time making our regular texture upload paths
more performant.
On 08/16/2018 06:23 AM, Phi Nguyen wrote:
Hi,
I hope to use the zero-memory copy on the Iris Pro 6200 (Broadwell/Skylake).
The extension
<https://www.khronos.org/registry/OpenGL/extensions/INTEL/INTEL_map_texture.txt>
says
only OpenGL 3.0 is required yet it does not show up on Ubuntu 18.04. I
saw a post from 2016
<https://lists.freedesktop.org/archives/mesa-dev/2016-January/105850.html>
mentioning
this feature, but that didn't get any replies.
Does an implementation of this even exist? How would I go about getting it?
Thank you,
Phi
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