Source/WebCore/Modules/WebGPU/GPUVertexState.h

/*
 * Copyright (C) 2021 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 */

#pragma once

#include "GPUProgrammableStage.h"
#include "GPUVertexBufferLayout.h"
#include <optional>
#include <pal/graphics/WebGPU/WebGPUVertexState.h>
#include <wtf/Vector.h>

namespace WebCore {

struct GPUVertexState : public GPUProgrammableStage {
    PAL::WebGPU::VertexState convertToBacking() const
    {
        ASSERT(module);
        return {
            {
                module->backing(),
                entryPoint,
                constants,
            },
            buffers.map([] (auto& buffer) -> std::optional<PAL::WebGPU::VertexBufferLayout> {
                if (buffer)
                    return buffer->convertToBacking();
                return std::nullopt;
            }),
        };
    }

    Vector<std::optional<GPUVertexBufferLayout>> buffers;
};

}