File indexing completed on 2024-04-28 05:30:39

 /*
     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
 {
 
 /**
  * SyncObject represents a fence used to synchronize operations in the kwin command stream
  * with operations in the X command stream.
  */
 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;
 };
 
 /**
  * SyncManager manages a set of fences used for explicit synchronization with the X command
  * stream.
  */
 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