<div dir="ltr">Cool. Thanks Lionel!<div><br></div><div>Best,</div><div>Phi</div></div><br><div class="gmail_quote"><div dir="ltr">On Thu, Aug 16, 2018 at 12:03 PM Lionel Landwerlin <<a href="mailto:lionel.g.landwerlin@intel.com">lionel.g.landwerlin@intel.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div class="m_-6440940053951210380moz-cite-prefix">Hey Phi,<br>
<br>
I can confirm this extension isn't implemented in Mesa.<br>
I don't why it wasn't.<br>
<br>
Talking briefly with Jason, it seems that mapping texture makes
less sense on Skylake and above generations.<br>
There we maintain compressed version of the textures in memory to
further reduce memory bandwidth.<br>
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).<br>
<br>
-<br>
Lionel<br>
<br>
On 16/08/18 14:23, Phi Nguyen wrote:<br>
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<div dir="ltr">Hi,
<div><br>
</div>
<div>I hope to use the zero-memory copy on the Iris Pro 6200
(Broadwell/Skylake).</div>
<div><br>
</div>
<div>The <a href="https://www.khronos.org/registry/OpenGL/extensions/INTEL/INTEL_map_texture.txt" target="_blank">extension</a> says only OpenGL 3.0 is
required yet it does not show up on Ubuntu 18.04. I saw a
post from <a href="https://lists.freedesktop.org/archives/mesa-dev/2016-January/105850.html" target="_blank">2016</a> mentioning this feature, but
that didn't get any replies.</div>
<div><br>
</div>
<div>Does an implementation of this even exist? How would I go
about getting it?</div>
<div><br>
</div>
<div>Thank you,</div>
<div>Phi</div>
</div>
<br>
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