[Mesa-dev] INTEL_map_texture on i915/i965

[Phi Nguyen]

Cool.  Thanks Lionel!

Best,
Phi

On Thu, Aug 16, 2018 at 12:03 PM Lionel Landwerlin <
lionel.g.landwerlin at intel.com> wrote:

> Hey Phi,
>
> I can confirm this extension isn't implemented in Mesa.
> I don't why it wasn't.
>
> Talking briefly with Jason, it seems that mapping texture makes less sense
> on Skylake and above generations.
> There we maintain compressed version of the textures in memory to further
> reduce memory bandwidth.
> This would make the memory mapped mechanism more costly because we would
> need to decompress the texture when you want to access it (probably close
> to a ReadPixels in terms of performance).
>
> -
> Lionel
>
> On 16/08/18 14:23, 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
>
>
> _______________________________________________
> mesa-dev mailing listmesa-dev at lists.freedesktop.orghttps://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/mesa-dev/attachments/20180816/c558d0da/attachment-0001.html>