Source/WebCore/Modules/WebGPU/GPUExtent3DDict.h

/*
 * Copyright (C) 2021 Apple Inc. All rights reserved.
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#pragma once

#include "GPUIntegralTypes.h"
#include <pal/graphics/WebGPU/WebGPUExtent3D.h>
#include <variant>
#include <wtf/Vector.h>

namespace WebCore {

struct GPUExtent3DDict {
    PAL::WebGPU::Extent3DDict convertToBacking() const
    {
        return {
            width,
            height,
            depthOrArrayLayers,
        };
    }

    GPUIntegerCoordinate width { 0 };
    GPUIntegerCoordinate height { 0 };
    GPUIntegerCoordinate depthOrArrayLayers { 0 };
};

using GPUExtent3D = std::variant<Vector<GPUIntegerCoordinate>, GPUExtent3DDict>;

inline PAL::WebGPU::Extent3D convertToBacking(const GPUExtent3D& extent3D)
{
    return WTF::switchOn(extent3D, [] (const Vector<GPUIntegerCoordinate>& vector) -> PAL::WebGPU::Extent3D {
        return vector;
    }, [] (const GPUExtent3DDict& extent3D) -> PAL::WebGPU::Extent3D {
        return extent3D.convertToBacking();
    });
}

}