/****************************************************************************
**
** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
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****************************************************************************/

#include "dragonbufferjobs_p.h"

#include <private/dragonjobs_common_p.h>

#include <QtConcurrentRun>

QT_BEGIN_NAMESPACE

using namespace Qt3DCore;

namespace Qt3DRender {
namespace Dragon {

LoadedBuffers loadBuffers(LoadedBuffers loadedBuffers, const ValueContainer<Buffer> &buffers)
{
    loadedBuffers.reset();

    if (!buffers.anythingDirty())
        return loadedBuffers;

    auto generateBuffer = [](const QNodeId &id, const Immutable<Buffer> &buffer) {
        Q_UNUSED(id);
        LoadedBuffer result;
        result.buffer = buffer;

        if (buffer->m_generator == nullptr) {
            result.data = buffer->m_data;
            return result;
        }
        result.data = (*buffer->m_generator)();
        return result;
    };

    auto compare = [](const Immutable<LoadedBuffer> &cached, const Immutable<Buffer> &buffer) {
        return cached->buffer == buffer;
    };

    loadedBuffers = synchronizeKeys(std::move(loadedBuffers), buffers, compare, generateBuffer);

    return loadedBuffers;
}

} // namespace Dragon
} // namespace Qt3DRender

QT_END_NAMESPACE