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  • Hash : dbd5d6df
    Author : Alexey Knyazev
    Date : 2023-02-17T00:00:00

    Vulkan: Fix border color adjustment for emulated formats
    
    Emulated opaque ETC compressed formats are decoded to
    RGBA8 so the border color must have its alpha as one.
    
    Generalized AdjustBorderColor to enforce opaque alpha
    for opaque formats and to support both ways, in which
    ANGLE could emulate LUMA formats.
    
    Moved AdjustBorderColor to renderer_utils so it could
    be used with other backends.
    
    Bug: angleproject:5978
    Change-Id: I9ec44444fd373b1ca6116ebc4447063a014025ce
    Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4265514
    Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
    Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
    

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    Description

    A conformant OpenGL ES implementation for Windows, Mac, Linux, iOS and Android.

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  • README.md

  • ANGLE back-ends

    This folder contains shared back-end-specific implementation files. The classes and types in renderer are not specified by GLES. They instead are common to all the various ANGLE implementations.

    See renderer_utils.h for various cross back-end utilties.

    ANGLE Formats

    The ANGLE format class, angle::Format, works as a union between GLES and all the various back-end formats. It can represent any type of format in ANGLE. e.g. Formats in Vulkan that don’t exist in GLES, or DXGI formats that don’t exist in GLES, or Windows/Android surface configs that don’t exist anywhere else.

    The glInternalFormat member of angle::Format represents the “closest” GL format for an ANGLE format. For formats that don’t exist in GLES this will not be exactly what the format represents.

    The back-ends also define their own format tables. See the Vulkan Format table docs and the [D3D11 format table docs][D23D11FormatDocs].

    DXGI Format Info

    DXGI formats are used in both the GL and D3D11 back-end. Therefore the generated info table lives in this common shared location.

    The DXGI info table is generated by gen_dxgi_format_table.py and sources data from dxgi_format_data.json. The main purpose of the table is to convert from a DXGI format to an ANGLE format, where the ANGLE format should have all the necessary information.