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** Copyright (C) 2008-2012 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of Qt 3D Studio.
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#include "render/Qt3DSRenderOcclusionQuery.h"
#include "render/Qt3DSRenderContext.h"
#include "foundation/StringTable.h"

namespace qt3ds {
namespace render {

    NVRenderOcclusionQuery::NVRenderOcclusionQuery(NVRenderContextImpl &context,
                                                   NVFoundationBase &fnd)
        : NVRenderQueryBase(context, fnd)
    {
    }

    NVRenderOcclusionQuery::~NVRenderOcclusionQuery() {}

    void NVRenderOcclusionQuery::Begin()
    {
        m_Backend->BeginQuery(m_QueryHandle, NVRenderQueryType::Samples);
    }

    void NVRenderOcclusionQuery::End()
    {
        m_Backend->EndQuery(m_QueryHandle, NVRenderQueryType::Samples);
    }

    void NVRenderOcclusionQuery::GetResult(QT3DSU32 *params)
    {
        m_Backend->GetQueryResult(m_QueryHandle, NVRenderQueryResultType::Result, params);
    }

    bool NVRenderOcclusionQuery::GetResultAvailable()
    {
        QT3DSU32 param;

        m_Backend->GetQueryResult(m_QueryHandle, NVRenderQueryResultType::ResultAvailable, &param);

        return (param == 1);
    }

    NVRenderOcclusionQuery *NVRenderOcclusionQuery::Create(NVRenderContextImpl &context)
    {
        if (!context.IsSampleQuerySupported())
            return NULL;

        NVRenderOcclusionQuery *retval =
            QT3DS_NEW(context.GetFoundation().getAllocator(),
                   NVRenderOcclusionQuery)(context, context.GetFoundation());

        return retval;
    }
}
}