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64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
/*
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SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#pragma once
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#include "vsyncmonitor.h"
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namespace KWin
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{
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/**
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* The FramebufferVsyncMonitorHelper class is responsible for waiting vsync events using the
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* FBIO_WAITFORVSYNC ioctl. Note that the helper runs on a separate thread.
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*/
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class FramebufferVsyncMonitorHelper : public QObject
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{
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Q_OBJECT
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public:
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explicit FramebufferVsyncMonitorHelper(int fileDescriptor, QObject *parent = nullptr);
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~FramebufferVsyncMonitorHelper() override;
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public Q_SLOTS:
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void poll();
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Q_SIGNALS:
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void errorOccurred();
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void vblankOccurred(std::chrono::nanoseconds timestamp);
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private:
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int m_fileDescriptor;
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};
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/**
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* The FramebufferVsyncMonitor class monitors vblank events using the FBIO_WAITFORVSYNC ioctl.
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*/
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class FramebufferVsyncMonitor : public VsyncMonitor
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{
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Q_OBJECT
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public:
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/**
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* Creates a fbdev vsync monitor for the device with the specified file descriptor @p fd.
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* This function returns @c null if an error has occurred.
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*/
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static FramebufferVsyncMonitor *create(int fd, QObject *parent);
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~FramebufferVsyncMonitor() override;
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public Q_SLOTS:
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void arm() override;
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private:
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explicit FramebufferVsyncMonitor(int fileDescriptor, QObject *parent = nullptr);
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QThread *m_thread;
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FramebufferVsyncMonitorHelper *m_helper;
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};
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} // namespace KWin
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