[Bug 98478] glCopyTexSubImage2D is much slower than glDrawArrays

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98478

Ian Romanick <idr at freedesktop.org> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #6 from Ian Romanick <idr at freedesktop.org> ---
(In reply to Kenneth Graunke from comment #3)
> The next step would be to determine what method i965 is using for
> CopyTexSubImage:
> 
> 1. BLORP (should be fast)
> 2. BLT (should be slow)
> 3. CPU maps (should be slow)
> 
> Putting a breakpoint in intelCopyTexSubImage and stepping through it should
> make it pretty clear which is happening, and if we're falling off the fast
> path, why.

Dongseong, have you had a chance to follow up on this?  This informations is
necessary for us to make progress on this issue.

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