glrendertimequery.h

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/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2023 Xaver Hugl <xaver.hugl@gmail.com>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
#pragma once
 
#include <chrono>
#include <epoxy/gl.h>
 
#include "kwin_export.h"
 
namespace KWin
{
 
class KWIN_EXPORT GLRenderTimeQuery
{
public:
    explicit GLRenderTimeQuery();
    ~GLRenderTimeQuery();
 
    void begin();
    void end();
 
    std::chrono::nanoseconds result();
 
private:
    GLuint m_query = 0;
    bool m_hasResult = false;
    std::chrono::nanoseconds m_cpuStart = std::chrono::nanoseconds::zero();
    std::chrono::nanoseconds m_cpuEnd = std::chrono::nanoseconds::zero();
};
 
}