x11syncmanager.h

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/*
    SPDX-FileCopyrightText: 2014 Fredrik Höglund <fredrik@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include "opengl/glutils.h"
 
#include <xcb/sync.h>
#include <xcb/xcb.h>
 
namespace KWin
{
 
class X11SyncObject
{
public:
    enum State {
        Ready,
        TriggerSent,
        Waiting,
        Done,
        Resetting,
    };
 
    X11SyncObject();
    ~X11SyncObject();
 
    State state() const
    {
        return m_state;
    }
 
    void trigger();
    void wait();
    bool finish();
    void reset();
    void finishResetting();
 
private:
    State m_state;
    GLsync m_sync;
    xcb_sync_fence_t m_fence;
    xcb_get_input_focus_cookie_t m_reset_cookie;
};
 
class X11SyncManager
{
public:
    enum {
        MaxFences = 4,
    };
 
    static X11SyncManager *create();
    ~X11SyncManager();
 
    bool endFrame();
 
    void triggerFence();
    void insertWait();
 
private:
    X11SyncManager();
 
    X11SyncObject *m_currentFence = nullptr;
    QList<X11SyncObject *> m_fences;
    int m_next = 0;
};
 
} // namespace KWin