[Bug 97790] Vulkan cts regressions due to 24be63066

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97790

            Bug ID: 97790
           Summary: Vulkan cts regressions due to 24be63066
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Several hundred tests regressed with

24be6306609179efddfb7e5cc6ec5d6a335c9b88
Author:     Jason Ekstrand <jason at jlekstrand.net>

Revert "i965: Drop the maximum 3D texture size to 512 on Sandy Bridge"

This reverts commit 6ba88bce64b343761aabe3a6c7ee285c6020a959.  The commit
was erroneous because GL has a separate limit, GL_MAX_FRAMEBUFFER_LAYERS
which guards the number of layers you are allowed to render into.

The GL 4.5 spec says:

   "The framebuffer attachment point attachment is said to be framebuffer
   attachment complete if [...] all of the following conditions are true:

      [...]

      If image is a three-dimensional, one- or two-dimensional array, or
      cube map array texture and the attachment is layered, the depth or
      layer count of the texture is less than or equal to the value of the
      implementation-dependent limit MAX_FRAMEBUFFER_LAYERS."

and goes on to say that "framebuffer complete" requires all attachments to
be "framebuffer attachment complete".

On Sandy Bridge, we set GL_MAX_FRAMEBUFFER_LAYERS to 512 so creating a 3D
texture bigger than 512 is fine; you just can't render into all of the
slices at once.

Fixes ES3-CTS.gtf.GL3Tests.npot_textures.npot_tex_image on Sandy Bridge

Signed-off-by: Jason Ekstrand <jason at jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Chad Versace <chadversary at chromium.org>


Jason already has a fix tested but not reviewed.

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