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  • Hash : fbec291e
    Author : Alexis Hétu
    Date : 2020-10-21T19:32:38

    Allow rendering to half float in ES2 contexts when possible
    
    According to the EXT_color_buffer_half_float spec:
    
    "Dependencies on OES_texture_half_float
    
        If OES_texture_half_float is not supported, then all references to
        RGBA16F_EXT, RGB16F_EXT, RG16F_EXT, R16F_EXT, HALF_FLOAT_OES and
        half should be ignored.
    
        If OES_texture_half_float is supported, textures created with:
    
            <internalformat> = RGBA
            <format> = RGBA
            <type> = HALF_FLOAT_OES
    
        are renderable."
    
    This fixes 4 viz_unittests when running with SwANGLE:
        All/GLI420ConverterPixelTest.ScaleAndConvert/0
        All/GLI420ConverterPixelTest.ScaleAndConvert/1
        GLScalerPixelTest.Example_ScaleAndExportForScreenVideoCapture
        GLScalerPixelTest.ScalesWithColorManagement
    
    The original attempt at landing this change
    (https://chromium-review.googlesource.com/c/angle/angle/+/2489726)
    was reverted due to dEQP failures on the Metal backend. After some
    investigation, it was decided to simply disable the 2 offending
    tests for now.
    
    Bug: angleproject:5174
    Change-Id: Id1e382b72d91109e4718c729cc6c5f0a0f413d7d
    Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2491930
    Reviewed-by: Geoff Lang <geofflang@chromium.org>
    Commit-Queue: Alexis Hétu <sugoi@chromium.org>
    

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