qt-everywhere-src-5.15.1/qtbase/src/gui/rhi/qrhiprofiler_p.h

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#ifndef QRHIPROFILER_H
#define QRHIPROFILER_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <private/qrhi_p.h>

QT_BEGIN_NAMESPACE

class QRhiProfilerPrivate;
class QIODevice;

class Q_GUI_EXPORT QRhiProfiler
{
public:
    enum StreamOp {
        NewBuffer = 1,
        ReleaseBuffer,
        NewBufferStagingArea,
        ReleaseBufferStagingArea,
        NewRenderBuffer,
        ReleaseRenderBuffer,
        NewTexture,
        ReleaseTexture,
        NewTextureStagingArea,
        ReleaseTextureStagingArea,
        ResizeSwapChain,
        ReleaseSwapChain,
        NewReadbackBuffer,
        ReleaseReadbackBuffer,
        GpuMemAllocStats,
        GpuFrameTime,
        FrameToFrameTime,
        FrameBuildTime
    };

    ~QRhiProfiler();

    void setDevice(QIODevice *device);

    void addVMemAllocatorStats();

    int frameTimingWriteInterval() const;
    void setFrameTimingWriteInterval(int frameCount);

    struct CpuTime {
        qint64 minTime = 0;
        qint64 maxTime = 0;
        float avgTime = 0;
    };

    struct GpuTime {
        float minTime = 0;
        float maxTime = 0;
        float avgTime = 0;
    };

    CpuTime frameToFrameTimes(QRhiSwapChain *sc) const;
    CpuTime frameBuildTimes(QRhiSwapChain *sc) const; // beginFrame - endFrame
    GpuTime gpuFrameTimes(QRhiSwapChain *sc) const;

private:
    Q_DISABLE_COPY(QRhiProfiler)
    QRhiProfiler();
    QRhiProfilerPrivate *d;
    friend class QRhiImplementation;
    friend class QRhiProfilerPrivate;
};

Q_DECLARE_TYPEINFO(QRhiProfiler::CpuTime, Q_MOVABLE_TYPE);
Q_DECLARE_TYPEINFO(QRhiProfiler::GpuTime, Q_MOVABLE_TYPE);

QT_END_NAMESPACE

#endif