2220ae44c4
Each of the backends becomes a plugin. This allows kwin_wayland to load the requested plugin and kwin itself doesn't need to link all the libraries needed. E.g. libdrm is no longer linked if running kwin_x11. Also this allows to create backends for the non-standard EGL platforms (examples could be raspberrypi or Android devices).
251 lines
7.7 KiB
C++
251 lines
7.7 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2011 Arthur Arlt <a.arlt@stud.uni-heidelberg.de>
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Copyright (C) 2012 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_COMPOSITE_H
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#define KWIN_COMPOSITE_H
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// KWin
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#include <kwinglobals.h>
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// KDE
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#include <KSelectionOwner>
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// Qt
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#include <QObject>
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#include <QElapsedTimer>
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#include <QTimer>
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#include <QBasicTimer>
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#include <QRegion>
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namespace KWin {
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class Client;
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class Scene;
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class CompositorSelectionOwner : public KSelectionOwner
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{
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Q_OBJECT
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public:
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CompositorSelectionOwner(const char *selection);
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private:
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friend class Compositor;
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bool owning;
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private Q_SLOTS:
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void looseOwnership();
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};
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class KWIN_EXPORT Compositor : public QObject {
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Q_OBJECT
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public:
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enum SuspendReason { NoReasonSuspend = 0, UserSuspend = 1<<0, BlockRuleSuspend = 1<<1, ScriptSuspend = 1<<2, AllReasonSuspend = 0xff };
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Q_DECLARE_FLAGS(SuspendReasons, SuspendReason)
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~Compositor();
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// when adding repaints caused by a window, you probably want to use
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// either Toplevel::addRepaint() or Toplevel::addWorkspaceRepaint()
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void addRepaint(const QRect& r);
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void addRepaint(const QRegion& r);
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void addRepaint(int x, int y, int w, int h);
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/**
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* Whether the Compositor is active. That is a Scene is present and the Compositor is
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* not shutting down itself.
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**/
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bool isActive();
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int xrrRefreshRate() const {
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return m_xrrRefreshRate;
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}
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void setCompositeResetTimer(int msecs);
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bool hasScene() const {
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return m_scene != NULL;
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}
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/**
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* Checks whether @p w is the Scene's overlay window.
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**/
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bool checkForOverlayWindow(WId w) const;
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/**
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* @returns The Scene's Overlay X Window.
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**/
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WId overlayWindow() const;
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/**
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* @returns Whether the Scene's Overlay X Window is visible.
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**/
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bool isOverlayWindowVisible() const;
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/**
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* Set's the Scene's Overlay X Window visibility to @p visible.
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**/
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void setOverlayWindowVisibility(bool visible);
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Scene *scene() {
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return m_scene;
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}
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/**
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* @brief Checks whether the Compositor has already been created by the Workspace.
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*
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* This method can be used to check whether self will return the Compositor instance or @c null.
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*
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* @return bool @c true if the Compositor has been created, @c false otherwise
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**/
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static bool isCreated() {
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return s_compositor != NULL;
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}
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/**
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* @brief Static check to test whether the Compositor is available and active.
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*
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* @return bool @c true if there is a Compositor and it is active, @c false otherwise
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**/
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static bool compositing() {
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return s_compositor != NULL && s_compositor->isActive();
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}
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// for delayed supportproperty management of effects
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void keepSupportProperty(xcb_atom_t atom);
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void removeSupportProperty(xcb_atom_t atom);
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public Q_SLOTS:
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void addRepaintFull();
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/**
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* @brief Suspends the Compositor if it is currently active.
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*
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* Note: it is possible that the Compositor is not able to suspend. Use @link isActive to check
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* whether the Compositor has been suspended.
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*
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* @return void
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* @see resume
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* @see isActive
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**/
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void suspend(Compositor::SuspendReason reason);
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/**
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* @brief Resumes the Compositor if it is currently suspended.
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*
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* Note: it is possible that the Compositor cannot be resumed, that is there might be Clients
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* blocking the usage of Compositing or the Scene might be broken. Use @link isActive to check
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* whether the Compositor has been resumed. Also check @link isCompositingPossible and
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* @link isOpenGLBroken.
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*
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* Note: The starting of the Compositor can require some time and is partially done threaded.
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* After this method returns the setup may not have been completed.
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*
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* @return void
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* @see suspend
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* @see isActive
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* @see isCompositingPossible
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* @see isOpenGLBroken
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**/
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void resume(Compositor::SuspendReason reason);
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/**
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* Actual slot to perform the toggling compositing.
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* That is if the Compositor is suspended it will be resumed and if the Compositor is active
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* it will be suspended.
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* Invoked primarily by the keybinding.
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* TODO: make private slot
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**/
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void slotToggleCompositing();
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/**
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* Re-initializes the Compositor completely.
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* Connected to the D-Bus signal org.kde.KWin /KWin reinitCompositing
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**/
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void slotReinitialize();
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/**
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* Schedules a new repaint if no repaint is currently scheduled.
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**/
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void scheduleRepaint();
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void checkUnredirect();
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void checkUnredirect(bool force);
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void updateCompositeBlocking();
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void updateCompositeBlocking(KWin::Client* c);
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/**
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* Notifies the compositor that SwapBuffers() is about to be called.
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* Rendering of the next frame will be deferred until bufferSwapComplete()
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* is called.
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*/
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void aboutToSwapBuffers();
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/**
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* Notifies the compositor that a pending buffer swap has completed.
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*/
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void bufferSwapComplete();
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Q_SIGNALS:
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void compositingToggled(bool active);
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void aboutToDestroy();
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protected:
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void timerEvent(QTimerEvent *te);
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private Q_SLOTS:
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void setup();
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/**
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* Called from setupCompositing() when the CompositingPrefs are ready.
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**/
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void slotCompositingOptionsInitialized();
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void finish();
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/**
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* Restarts the Compositor if running.
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* That is the Compositor will be stopped and started again.
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**/
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void restart();
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void fallbackToXRenderCompositing();
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void performCompositing();
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void delayedCheckUnredirect();
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void slotConfigChanged();
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void releaseCompositorSelection();
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void deleteUnusedSupportProperties();
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private:
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void claimCompositorSelection();
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void setCompositeTimer();
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bool windowRepaintsPending() const;
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/**
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* Continues the startup after Scene And Workspace are created
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**/
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void startupWithWorkspace();
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/**
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* Whether the Compositor is currently suspended, 8 bits encoding the reason
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**/
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SuspendReasons m_suspended;
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QBasicTimer compositeTimer;
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CompositorSelectionOwner* cm_selection;
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QTimer m_releaseSelectionTimer;
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QList<xcb_atom_t> m_unusedSupportProperties;
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QTimer m_unusedSupportPropertyTimer;
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qint64 vBlankInterval, fpsInterval;
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int m_xrrRefreshRate;
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QElapsedTimer nextPaintReference;
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QRegion repaints_region;
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QTimer unredirectTimer;
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bool forceUnredirectCheck;
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QTimer compositeResetTimer; // for compressing composite resets
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bool m_finishing; // finish() sets this variable while shutting down
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bool m_starting; // start() sets this variable while starting
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qint64 m_timeSinceLastVBlank;
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qint64 m_timeSinceStart = 0;
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Scene *m_scene;
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bool m_bufferSwapPending;
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bool m_composeAtSwapCompletion;
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KWIN_SINGLETON_VARIABLE(Compositor, s_compositor)
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};
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}
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# endif // KWIN_COMPOSITE_H
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