tree ddd135fe69a9dc294155b2be0acea7ffa7ca5e54
parent 2e40a573e506d6d413bda28d67f54be394c48339
author Nicolas Capens <capn@google.com> 1596287843 -0400
committer Nicolas Capens <nicolascapens@google.com> 1596722991 +0000

Treat the array coordinate separately

The array layer coordinate isn't subject to addressing modes like the
other coordinates. There's just one selection computation:
 https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#textures-unnormalized-to-integer
This change eliminates the internally used ADDRESSING_LAYER mode, and
avoids using the 'w' coordinate as the array layer coordinate for 2D
array images (instead exclusively using it for 3D images).

Also, the cube face index is combined with the array layer in case of
cube array images. The division by 6 was eliminated by adjusting the
descriptor 'depth' field instead.

Bug: b/162315264
Change-Id: I4a541697ea265b3ad5b7d7c3a2420c045f46cbbe
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/47388
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>