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  • Hash : a4f706b2
    Author : Le Hoang Quyen
    Date : 2020-08-04T12:08:00

    Metal: Use compute to generate 3D texture's mipmap.
    
    - Metal's built-in blit based mipmap generator doesn't use box
      filtering. Hence manual generation using compute is needed.
    
    - Compute based mipmap gen can generate up to 4 mips per pass if the
      base level is power of 2.
    
    - This approach can be extended to 2D/cube texture's mipmap generation
      in future.
    
    Bug: angleproject:4921
    Bug: angleproject:2634
    Change-Id: I7f997669fe39afef075b2bca2406e9424cbb3016
    Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2336120
    Reviewed-by: Jamie Madill <jmadill@chromium.org>
    Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
    Commit-Queue: Le Hoang Quyen <le.hoang.q@gmail.com>
    

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