[Bug 77553] [ILK/SNB Bisected]Piglit spec_ARB_texture_cube_map_copyteximage_CUBE fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77553

Kenneth Graunke <kenneth at whitecape.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|eric at anholt.net             |jljusten at gmail.com

--- Comment #3 from Kenneth Graunke <kenneth at whitecape.org> ---
Previously, the Meta CopyTexSubImage path would do ReadPixels and TexImage. 
The TexImage was done via CPU mappings.

With this patch, it uses Meta BlitFramebuffer, which does texturing and
rendering.  Unfortunately, it hits a limitation in our Gen4-6 rendering path:
the hardware ignores the low bits of the surface tile offsets.  So, we get bad
rendering.

Jordan's gen6-layered series fixes this on Sandybridge.  Thus, reassigning to
him.  I'm not sure what to do about Ironlake.

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