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  • Hash : cfc40d2b
    Author : Yuxin Hu
    Date : 2023-07-19T17:47:13

    Vulkan: Adjust clear color precision for GL_RGB5_A1 FBO
    
    When clear color has more precision than the framebuffer
    format can hold, dithering is automatically applied on
    some hardware.
    
    This issue causes below dEQP tests to fail when the FBO
    color attachment format is RGB5_A1:
    
    KHR-GLES31.core.draw_buffers_indexed.color_masks
    KHR-GLES32.core.draw_buffers_indexed.color_masks
    
    Adjust the clear color precision for RGB5_A1 format to
    workaround the issue.
    
    We can remove this workaround once the vulkan driver
    fixes the auto-dithering problem.
    
    Bug: b/292282210
    Change-Id: Ic3ffebd2d20c8782612619a60d1ec2cc6d613c22
    Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4937472
    Reviewed-by: Charlie Lao <cclao@google.com>
    Reviewed-by: Roman Lavrov <romanl@google.com>
    Commit-Queue: Yuxin Hu <yuxinhu@google.com>
    

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