Source/WebKit/Shared/WebGPU/WebGPUVertexState.cpp

/*
 * 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.
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 *    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
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#include "config.h"
#include "WebGPUVertexState.h"

#if ENABLE(GPU_PROCESS)

#include "WebGPUConvertFromBackingContext.h"
#include "WebGPUConvertToBackingContext.h"
#include <pal/graphics/WebGPU/WebGPUVertexState.h>

namespace WebKit::WebGPU {

std::optional<VertexState> ConvertToBackingContext::convertToBacking(const PAL::WebGPU::VertexState& vertexState)
{
    auto base = convertToBacking(static_cast<const PAL::WebGPU::ProgrammableStage&>(vertexState));
    if (!base)
        return std::nullopt;

    Vector<std::optional<VertexBufferLayout>> buffers;
    buffers.reserveInitialCapacity(vertexState.buffers.size());
    for (const auto& buffer : vertexState.buffers) {
        if (buffer) {
            auto convertedBuffer = convertToBacking(*buffer);
            if (!convertedBuffer)
                return std::nullopt;
            buffers.uncheckedAppend(WTFMove(convertedBuffer));
        } else
            buffers.uncheckedAppend(std::nullopt);
    }

    return { { WTFMove(*base), WTFMove(buffers) } };
}

std::optional<PAL::WebGPU::VertexState> ConvertFromBackingContext::convertFromBacking(const VertexState& vertexState)
{
    auto base = convertFromBacking(static_cast<const ProgrammableStage&>(vertexState));
    if (!base)
        return std::nullopt;

    Vector<std::optional<PAL::WebGPU::VertexBufferLayout>> buffers;
    buffers.reserveInitialCapacity(vertexState.buffers.size());
    for (const auto& backingBuffer : vertexState.buffers) {
        if (backingBuffer) {
            auto buffer = convertFromBacking(*backingBuffer);
            if (!buffer)
                return std::nullopt;
            buffers.uncheckedAppend(WTFMove(*buffer));
        } else
            buffers.uncheckedAppend(std::nullopt);
    }

    return { { WTFMove(*base), WTFMove(buffers) } };
}

} // namespace WebKit

#endif // ENABLE(GPU_PROCESS)