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kwin/composite.cpp
Vlad Zahorodnii 9d4a32596c Drop some custom list typedefs 
Summary:
Qt has its own thing where a type might also have corresponding list
alias, e.g. QObject and QObjectList, QWidget and QWidgetList. I don't
know why Qt does that, maybe for some historical reasons, but what
matters is that we copy this pattern here in KWin. While this pattern
might be useful with some long list types, for example

    QList<QWeakPointer<TabBoxClient>> TabBoxClientList

in general, it causes more harm than good. For example, we've got two
new client types, do we need corresponding list typedefs for them? If
no, why do we have ClientList and so on?

Another problem with these typedefs is that you need to include utils.h
header in order to use them. A better way to handle such things is to
just forward declare a client class (if that's possible) and use it
directly with QList or QVector. This way translation units don't get
"bloated" with utils.h stuff for no apparent reason.

So, in order to make code more consistent and easier to follow, this
change drops some of our custom typedefs. Namely ConstClientList,
ClientList, DeletedList, UnmanagedList, ToplevelList, and GroupList.

Test Plan: Compiles.

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D24950
2019-11-27 15:54:08 +02:00

995 lines
30 KiB
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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "composite.h"
#include "dbusinterface.h"
#include "x11client.h"
#include "decorations/decoratedclient.h"
#include "deleted.h"
#include "effects.h"
#include "internal_client.h"
#include "overlaywindow.h"
#include "platform.h"
#include "scene.h"
#include "screens.h"
#include "shadow.h"
#include "xdgshellclient.h"
#include "unmanaged.h"
#include "useractions.h"
#include "utils.h"
#include "wayland_server.h"
#include "workspace.h"
#include "xcbutils.h"
#include <kwingltexture.h>
#include <KWayland/Server/surface_interface.h>
#include <KGlobalAccel>
#include <KLocalizedString>
#include <KPluginLoader>
#include <KPluginMetaData>
#include <KNotification>
#include <KSelectionOwner>
#include <QDateTime>
#include <QFutureWatcher>
#include <QMenu>
#include <QOpenGLContext>
#include <QQuickWindow>
#include <QtConcurrentRun>
#include <QTextStream>
#include <QTimerEvent>
#include <xcb/composite.h>
#include <xcb/damage.h>
#include <cstdio>
Q_DECLARE_METATYPE(KWin::X11Compositor::SuspendReason)
namespace KWin
{
// See main.cpp:
extern int screen_number;
extern bool is_multihead;
extern int currentRefreshRate();
Compositor *Compositor::s_compositor = nullptr;
Compositor *Compositor::self()
{
return s_compositor;
}
WaylandCompositor *WaylandCompositor::create(QObject *parent)
{
Q_ASSERT(!s_compositor);
auto *compositor = new WaylandCompositor(parent);
s_compositor = compositor;
return compositor;
}
X11Compositor *X11Compositor::create(QObject *parent)
{
Q_ASSERT(!s_compositor);
auto *compositor = new X11Compositor(parent);
s_compositor = compositor;
return compositor;
}
class CompositorSelectionOwner : public KSelectionOwner
{
Q_OBJECT
public:
CompositorSelectionOwner(const char *selection)
: KSelectionOwner(selection, connection(), rootWindow())
, m_owning(false)
{
connect (this, &CompositorSelectionOwner::lostOwnership,
this, [this]() { m_owning = false; });
}
bool owning() const {
return m_owning;
}
void setOwning(bool own) {
m_owning = own;
}
private:
bool m_owning;
};
static inline qint64 milliToNano(int milli) { return qint64(milli) * 1000 * 1000; }
static inline qint64 nanoToMilli(int nano) { return nano / (1000*1000); }
Compositor::Compositor(QObject* workspace)
: QObject(workspace)
, m_state(State::Off)
, m_selectionOwner(nullptr)
, vBlankInterval(0)
, fpsInterval(0)
, m_timeSinceLastVBlank(0)
, m_scene(nullptr)
, m_bufferSwapPending(false)
, m_composeAtSwapCompletion(false)
{
connect(options, &Options::configChanged, this, &Compositor::configChanged);
connect(options, &Options::animationSpeedChanged, this, &Compositor::configChanged);
m_monotonicClock.start();
// 2 sec which should be enough to restart the compositor.
static const int compositorLostMessageDelay = 2000;
m_releaseSelectionTimer.setSingleShot(true);
m_releaseSelectionTimer.setInterval(compositorLostMessageDelay);
connect(&m_releaseSelectionTimer, &QTimer::timeout,
this, &Compositor::releaseCompositorSelection);
m_unusedSupportPropertyTimer.setInterval(compositorLostMessageDelay);
m_unusedSupportPropertyTimer.setSingleShot(true);
connect(&m_unusedSupportPropertyTimer, &QTimer::timeout,
this, &Compositor::deleteUnusedSupportProperties);
// Delay the call to start by one event cycle.
// The ctor of this class is invoked from the Workspace ctor, that means before
// Workspace is completely constructed, so calling Workspace::self() would result
// in undefined behavior. This is fixed by using a delayed invocation.
if (kwinApp()->platform()->isReady()) {
QTimer::singleShot(0, this, &Compositor::start);
}
connect(kwinApp()->platform(), &Platform::readyChanged, this,
[this] (bool ready) {
if (ready) {
start();
} else {
stop();
}
}, Qt::QueuedConnection
);
if (qEnvironmentVariableIsSet("KWIN_MAX_FRAMES_TESTED"))
m_framesToTestForSafety = qEnvironmentVariableIntValue("KWIN_MAX_FRAMES_TESTED");
// register DBus
new CompositorDBusInterface(this);
}
Compositor::~Compositor()
{
emit aboutToDestroy();
stop();
deleteUnusedSupportProperties();
destroyCompositorSelection();
s_compositor = nullptr;
}
bool Compositor::setupStart()
{
if (kwinApp()->isTerminating()) {
// Don't start while KWin is terminating. An event to restart might be lingering
// in the event queue due to graphics reset.
return false;
}
if (m_state != State::Off) {
return false;
}
m_state = State::Starting;
options->reloadCompositingSettings(true);
setupX11Support();
// There might still be a deleted around, needs to be cleared before
// creating the scene (BUG 333275).
if (Workspace::self()) {
while (!Workspace::self()->deletedList().isEmpty()) {
Workspace::self()->deletedList().first()->discard();
}
}
emit aboutToToggleCompositing();
auto supportedCompositors = kwinApp()->platform()->supportedCompositors();
const auto userConfigIt = std::find(supportedCompositors.begin(), supportedCompositors.end(),
options->compositingMode());
if (userConfigIt != supportedCompositors.end()) {
supportedCompositors.erase(userConfigIt);
supportedCompositors.prepend(options->compositingMode());
} else {
qCWarning(KWIN_CORE)
<< "Configured compositor not supported by Platform. Falling back to defaults";
}
const auto availablePlugins = KPluginLoader::findPlugins(QStringLiteral("org.kde.kwin.scenes"));
for (auto type : qAsConst(supportedCompositors)) {
const auto pluginIt = std::find_if(availablePlugins.begin(), availablePlugins.end(),
[type] (const auto &plugin) {
const auto &metaData = plugin.rawData();
auto it = metaData.find(QStringLiteral("CompositingType"));
if (it != metaData.end()) {
if ((*it).toInt() == int{type}) {
return true;
}
}
return false;
});
if (pluginIt != availablePlugins.end()) {
std::unique_ptr<SceneFactory>
factory{ qobject_cast<SceneFactory*>(pluginIt->instantiate()) };
if (factory) {
m_scene = factory->create(this);
if (m_scene) {
if (!m_scene->initFailed()) {
qCDebug(KWIN_CORE) << "Instantiated compositing plugin:"
<< pluginIt->name();
break;
} else {
delete m_scene;
m_scene = nullptr;
}
}
}
}
}
if (m_scene == nullptr || m_scene->initFailed()) {
qCCritical(KWIN_CORE) << "Failed to initialize compositing, compositing disabled";
m_state = State::Off;
delete m_scene;
m_scene = nullptr;
if (m_selectionOwner) {
m_selectionOwner->setOwning(false);
m_selectionOwner->release();
}
if (!supportedCompositors.contains(NoCompositing)) {
qCCritical(KWIN_CORE) << "The used windowing system requires compositing";
qCCritical(KWIN_CORE) << "We are going to quit KWin now as it is broken";
qApp->quit();
}
return false;
}
CompositingType compositingType = m_scene->compositingType();
if (compositingType & OpenGLCompositing) {
// Override for OpenGl sub-type OpenGL2Compositing.
compositingType = OpenGLCompositing;
}
kwinApp()->platform()->setSelectedCompositor(compositingType);
if (!Workspace::self() && m_scene && m_scene->compositingType() == QPainterCompositing) {
// Force Software QtQuick on first startup with QPainter.
QQuickWindow::setSceneGraphBackend(QSGRendererInterface::Software);
}
connect(m_scene, &Scene::resetCompositing, this, &Compositor::reinitialize);
emit sceneCreated();
return true;
}
void Compositor::claimCompositorSelection()
{
if (!m_selectionOwner) {
char selection_name[ 100 ];
sprintf(selection_name, "_NET_WM_CM_S%d", Application::x11ScreenNumber());
m_selectionOwner = new CompositorSelectionOwner(selection_name);
connect(m_selectionOwner, &CompositorSelectionOwner::lostOwnership,
this, &Compositor::stop);
}
if (!m_selectionOwner) {
// No X11 yet.
return;
}
if (!m_selectionOwner->owning()) {
// Force claim ownership.
m_selectionOwner->claim(true);
m_selectionOwner->setOwning(true);
}
}
void Compositor::setupX11Support()
{
auto *con = kwinApp()->x11Connection();
if (!con) {
delete m_selectionOwner;
m_selectionOwner = nullptr;
return;
}
claimCompositorSelection();
xcb_composite_redirect_subwindows(con, kwinApp()->x11RootWindow(),
XCB_COMPOSITE_REDIRECT_MANUAL);
}
void Compositor::startupWithWorkspace()
{
connect(kwinApp(), &Application::x11ConnectionChanged,
this, &Compositor::setupX11Support, Qt::UniqueConnection);
Workspace::self()->markXStackingOrderAsDirty();
Q_ASSERT(m_scene);
connect(workspace(), &Workspace::destroyed, this, [this] { compositeTimer.stop(); });
setupX11Support();
fpsInterval = options->maxFpsInterval();
const auto rate = currentRefreshRate();
Q_ASSERT(rate != 0); // There is a fallback in options.cpp, so why check at all?
// If we do vsync, set the fps to the next multiple of the vblank rate.
vBlankInterval = milliToNano(1000) / currentRefreshRate();
fpsInterval = qMax((fpsInterval / vBlankInterval) * vBlankInterval, vBlankInterval);
// Sets also the 'effects' pointer.
kwinApp()->platform()->createEffectsHandler(this, m_scene);
connect(Workspace::self(), &Workspace::deletedRemoved, m_scene, &Scene::removeToplevel);
connect(effects, &EffectsHandler::screenGeometryChanged, this, &Compositor::addRepaintFull);
for (X11Client *c : Workspace::self()->clientList()) {
c->setupCompositing();
c->updateShadow();
}
for (X11Client *c : Workspace::self()->desktopList()) {
c->setupCompositing();
}
for (Unmanaged *c : Workspace::self()->unmanagedList()) {
c->setupCompositing();
c->updateShadow();
}
for (InternalClient *client : workspace()->internalClients()) {
client->setupCompositing();
client->updateShadow();
}
if (auto *server = waylandServer()) {
const auto clients = server->clients();
for (XdgShellClient *c : clients) {
c->setupCompositing();
c->updateShadow();
}
}
m_state = State::On;
emit compositingToggled(true);
if (m_releaseSelectionTimer.isActive()) {
m_releaseSelectionTimer.stop();
}
// Render at least once.
addRepaintFull();
performCompositing();
}
void Compositor::scheduleRepaint()
{
if (!compositeTimer.isActive())
setCompositeTimer();
}
void Compositor::stop()
{
if (m_state == State::Off || m_state == State::Stopping) {
return;
}
m_state = State::Stopping;
emit aboutToToggleCompositing();
m_releaseSelectionTimer.start();
// Some effects might need access to effect windows when they are about to
// be destroyed, for example to unreference deleted windows, so we have to
// make sure that effect windows outlive effects.
delete effects;
effects = nullptr;
if (Workspace::self()) {
for (X11Client *c : Workspace::self()->clientList()) {
m_scene->removeToplevel(c);
}
for (X11Client *c : Workspace::self()->desktopList()) {
m_scene->removeToplevel(c);
}
for (Unmanaged *c : Workspace::self()->unmanagedList()) {
m_scene->removeToplevel(c);
}
for (InternalClient *client : workspace()->internalClients()) {
m_scene->removeToplevel(client);
}
for (X11Client *c : Workspace::self()->clientList()) {
c->finishCompositing();
}
for (X11Client *c : Workspace::self()->desktopList()) {
c->finishCompositing();
}
for (Unmanaged *c : Workspace::self()->unmanagedList()) {
c->finishCompositing();
}
for (InternalClient *client : workspace()->internalClients()) {
client->finishCompositing();
}
if (auto *con = kwinApp()->x11Connection()) {
xcb_composite_unredirect_subwindows(con, kwinApp()->x11RootWindow(),
XCB_COMPOSITE_REDIRECT_MANUAL);
}
while (!workspace()->deletedList().isEmpty()) {
workspace()->deletedList().first()->discard();
}
}
if (waylandServer()) {
for (XdgShellClient *c : waylandServer()->clients()) {
m_scene->removeToplevel(c);
}
for (XdgShellClient *c : waylandServer()->clients()) {
c->finishCompositing();
}
}
delete m_scene;
m_scene = nullptr;
compositeTimer.stop();
repaints_region = QRegion();
m_state = State::Off;
emit compositingToggled(false);
}
void Compositor::destroyCompositorSelection()
{
delete m_selectionOwner;
m_selectionOwner = nullptr;
}
void Compositor::releaseCompositorSelection()
{
switch (m_state) {
case State::On:
// We are compositing at the moment. Don't release.
break;
case State::Off:
if (m_selectionOwner) {
qCDebug(KWIN_CORE) << "Releasing compositor selection";
m_selectionOwner->setOwning(false);
m_selectionOwner->release();
}
break;
case State::Starting:
case State::Stopping:
// Still starting or shutting down the compositor. Starting might fail
// or after stopping a restart might follow. So test again later on.
m_releaseSelectionTimer.start();
break;
}
}
void Compositor::keepSupportProperty(xcb_atom_t atom)
{
m_unusedSupportProperties.removeAll(atom);
}
void Compositor::removeSupportProperty(xcb_atom_t atom)
{
m_unusedSupportProperties << atom;
m_unusedSupportPropertyTimer.start();
}
void Compositor::deleteUnusedSupportProperties()
{
if (m_state == State::Starting || m_state == State::Stopping) {
// Currently still maybe restarting the compositor.
m_unusedSupportPropertyTimer.start();
return;
}
if (auto *con = kwinApp()->x11Connection()) {
for (const xcb_atom_t &atom : qAsConst(m_unusedSupportProperties)) {
// remove property from root window
xcb_delete_property(con, kwinApp()->x11RootWindow(), atom);
}
m_unusedSupportProperties.clear();
}
}
void Compositor::configChanged()
{
reinitialize();
addRepaintFull();
}
void Compositor::reinitialize()
{
// Reparse config. Config options will be reloaded by start()
kwinApp()->config()->reparseConfiguration();
// Restart compositing
stop();
start();
if (effects) { // start() may fail
effects->reconfigure();
}
}
void Compositor::addRepaint(int x, int y, int w, int h)
{
if (m_state != State::On) {
return;
}
repaints_region += QRegion(x, y, w, h);
scheduleRepaint();
}
void Compositor::addRepaint(const QRect& r)
{
if (m_state != State::On) {
return;
}
repaints_region += r;
scheduleRepaint();
}
void Compositor::addRepaint(const QRegion& r)
{
if (m_state != State::On) {
return;
}
repaints_region += r;
scheduleRepaint();
}
void Compositor::addRepaintFull()
{
if (m_state != State::On) {
return;
}
const QSize &s = screens()->size();
repaints_region = QRegion(0, 0, s.width(), s.height());
scheduleRepaint();
}
void Compositor::timerEvent(QTimerEvent *te)
{
if (te->timerId() == compositeTimer.timerId()) {
performCompositing();
} else
QObject::timerEvent(te);
}
void Compositor::aboutToSwapBuffers()
{
Q_ASSERT(!m_bufferSwapPending);
m_bufferSwapPending = true;
}
void Compositor::bufferSwapComplete()
{
Q_ASSERT(m_bufferSwapPending);
m_bufferSwapPending = false;
emit bufferSwapCompleted();
if (m_composeAtSwapCompletion) {
m_composeAtSwapCompletion = false;
performCompositing();
}
}
void Compositor::performCompositing()
{
// If a buffer swap is still pending, we return to the event loop and
// continue processing events until the swap has completed.
if (m_bufferSwapPending) {
m_composeAtSwapCompletion = true;
compositeTimer.stop();
return;
}
// If outputs are disabled, we return to the event loop and
// continue processing events until the outputs are enabled again
if (!kwinApp()->platform()->areOutputsEnabled()) {
compositeTimer.stop();
return;
}
// Create a list of all windows in the stacking order
QList<Toplevel *> windows = Workspace::self()->xStackingOrder();
QList<Toplevel *> damaged;
// Reset the damage state of each window and fetch the damage region
// without waiting for a reply
for (Toplevel *win : windows) {
if (win->resetAndFetchDamage()) {
damaged << win;
}
}
if (damaged.count() > 0) {
m_scene->triggerFence();
if (auto c = kwinApp()->x11Connection()) {
xcb_flush(c);
}
}
// Move elevated windows to the top of the stacking order
for (EffectWindow *c : static_cast<EffectsHandlerImpl *>(effects)->elevatedWindows()) {
Toplevel *t = static_cast<EffectWindowImpl *>(c)->window();
windows.removeAll(t);
windows.append(t);
}
// Get the replies
for (Toplevel *win : damaged) {
// Discard the cached lanczos texture
if (win->effectWindow()) {
const QVariant texture = win->effectWindow()->data(LanczosCacheRole);
if (texture.isValid()) {
delete static_cast<GLTexture *>(texture.value<void*>());
win->effectWindow()->setData(LanczosCacheRole, QVariant());
}
}
win->getDamageRegionReply();
}
if (repaints_region.isEmpty() && !windowRepaintsPending()) {
m_scene->idle();
m_timeSinceLastVBlank = fpsInterval - (options->vBlankTime() + 1); // means "start now"
// Note: It would seem here we should undo suspended unredirect, but when scenes need
// it for some reason, e.g. transformations or translucency, the next pass that does not
// need this anymore and paints normally will also reset the suspended unredirect.
// Otherwise the window would not be painted normally anyway.
compositeTimer.stop();
return;
}
// Skip windows that are not yet ready for being painted and if screen is locked skip windows
// that are neither lockscreen nor inputmethod windows.
//
// TODO? This cannot be used so carelessly - needs protections against broken clients, the
// window should not get focus before it's displayed, handle unredirected windows properly and
// so on.
for (Toplevel *win : windows) {
if (!win->readyForPainting()) {
windows.removeAll(win);
}
if (waylandServer() && waylandServer()->isScreenLocked()) {
if(!win->isLockScreen() && !win->isInputMethod()) {
windows.removeAll(win);
}
}
}
QRegion repaints = repaints_region;
// clear all repaints, so that post-pass can add repaints for the next repaint
repaints_region = QRegion();
if (m_framesToTestForSafety > 0 && (m_scene->compositingType() & OpenGLCompositing)) {
kwinApp()->platform()->createOpenGLSafePoint(Platform::OpenGLSafePoint::PreFrame);
}
m_timeSinceLastVBlank = m_scene->paint(repaints, windows);
if (m_framesToTestForSafety > 0) {
if (m_scene->compositingType() & OpenGLCompositing) {
kwinApp()->platform()->createOpenGLSafePoint(Platform::OpenGLSafePoint::PostFrame);
}
m_framesToTestForSafety--;
if (m_framesToTestForSafety == 0 && (m_scene->compositingType() & OpenGLCompositing)) {
kwinApp()->platform()->createOpenGLSafePoint(
Platform::OpenGLSafePoint::PostLastGuardedFrame);
}
}
if (waylandServer()) {
const auto currentTime = static_cast<quint32>(m_monotonicClock.elapsed());
for (Toplevel *win : qAsConst(windows)) {
if (auto surface = win->surface()) {
surface->frameRendered(currentTime);
}
}
}
// Stop here to ensure *we* cause the next repaint schedule - not some effect
// through m_scene->paint().
compositeTimer.stop();
// Trigger at least one more pass even if there would be nothing to paint, so that scene->idle()
// is called the next time. If there would be nothing pending, it will not restart the timer and
// scheduleRepaint() would restart it again somewhen later, called from functions that
// would again add something pending.
if (m_bufferSwapPending) {
m_composeAtSwapCompletion = true;
} else {
scheduleRepaint();
}
}
template <class T>
static bool repaintsPending(const QList<T*> &windows)
{
return std::any_of(windows.begin(), windows.end(),
[](T *t) { return !t->repaints().isEmpty(); });
}
bool Compositor::windowRepaintsPending() const
{
if (repaintsPending(Workspace::self()->clientList())) {
return true;
}
if (repaintsPending(Workspace::self()->desktopList())) {
return true;
}
if (repaintsPending(Workspace::self()->unmanagedList())) {
return true;
}
if (repaintsPending(Workspace::self()->deletedList())) {
return true;
}
if (auto *server = waylandServer()) {
const auto &clients = server->clients();
auto test = [](XdgShellClient *c) {
return c->readyForPainting() && !c->repaints().isEmpty();
};
if (std::any_of(clients.begin(), clients.end(), test)) {
return true;
}
}
const auto &internalClients = workspace()->internalClients();
auto internalTest = [] (InternalClient *client) {
return client->isShown(true) && !client->repaints().isEmpty();
};
if (std::any_of(internalClients.begin(), internalClients.end(), internalTest)) {
return true;
}
return false;
}
void Compositor::setCompositeTimer()
{
if (m_state != State::On) {
return;
}
// Don't start the timer if we're waiting for a swap event
if (m_bufferSwapPending && m_composeAtSwapCompletion)
return;
// Don't start the timer if all outputs are disabled
if (!kwinApp()->platform()->areOutputsEnabled()) {
return;
}
uint waitTime = 1000 / refreshRate();
// Force 4fps minimum:
compositeTimer.start(qMin(waitTime, 250u), this);
}
bool Compositor::isActive()
{
return m_state == State::On;
}
WaylandCompositor::WaylandCompositor(QObject *parent)
: Compositor(parent)
{
connect(kwinApp(), &Application::x11ConnectionAboutToBeDestroyed,
this, &WaylandCompositor::destroyCompositorSelection);
}
void WaylandCompositor::toggleCompositing()
{
// For the shortcut. Not possible on Wayland because we always composite.
}
void WaylandCompositor::start()
{
if (!Compositor::setupStart()) {
// Internal setup failed, abort.
return;
}
// TODO: This is problematic on Wayland. We should get the highest refresh rate
// and not the one of the first output. Also on hotplug reevaluate.
// On X11 do it also like this?
m_refreshRate = KWin::currentRefreshRate();
if (Workspace::self()) {
startupWithWorkspace();
} else {
connect(kwinApp(), &Application::workspaceCreated,
this, &WaylandCompositor::startupWithWorkspace);
}
}
int WaylandCompositor::refreshRate() const
{
return m_refreshRate;
}
X11Compositor::X11Compositor(QObject *parent)
: Compositor(parent)
, m_suspended(options->isUseCompositing() ? NoReasonSuspend : UserSuspend)
, m_xrrRefreshRate(0)
{
}
void X11Compositor::toggleCompositing()
{
if (m_suspended) {
// Direct user call; clear all bits.
resume(AllReasonSuspend);
} else {
// But only set the user one (sufficient to suspend).
suspend(UserSuspend);
}
}
void X11Compositor::reinitialize()
{
// Resume compositing if suspended.
m_suspended = NoReasonSuspend;
Compositor::reinitialize();
}
void X11Compositor::configChanged()
{
if (m_suspended) {
stop();
return;
}
Compositor::configChanged();
}
void X11Compositor::suspend(X11Compositor::SuspendReason reason)
{
Q_ASSERT(reason != NoReasonSuspend);
m_suspended |= reason;
if (reason & ScriptSuspend) {
// When disabled show a shortcut how the user can get back compositing.
const auto shortcuts = KGlobalAccel::self()->shortcut(
workspace()->findChild<QAction*>(QStringLiteral("Suspend Compositing")));
if (!shortcuts.isEmpty()) {
// Display notification only if there is the shortcut.
const QString message =
i18n("Desktop effects have been suspended by another application.<br/>"
"You can resume using the '%1' shortcut.",
shortcuts.first().toString(QKeySequence::NativeText));
KNotification::event(QStringLiteral("compositingsuspendeddbus"), message);
}
}
stop();
}
void X11Compositor::resume(X11Compositor::SuspendReason reason)
{
Q_ASSERT(reason != NoReasonSuspend);
m_suspended &= ~reason;
start();
}
void X11Compositor::start()
{
if (m_suspended) {
QStringList reasons;
if (m_suspended & UserSuspend) {
reasons << QStringLiteral("Disabled by User");
}
if (m_suspended & BlockRuleSuspend) {
reasons << QStringLiteral("Disabled by Window");
}
if (m_suspended & ScriptSuspend) {
reasons << QStringLiteral("Disabled by Script");
}
qCDebug(KWIN_CORE) << "Compositing is suspended, reason:" << reasons;
return;
} else if (!kwinApp()->platform()->compositingPossible()) {
qCCritical(KWIN_CORE) << "Compositing is not possible";
return;
}
if (!Compositor::setupStart()) {
// Internal setup failed, abort.
return;
}
m_xrrRefreshRate = KWin::currentRefreshRate();
startupWithWorkspace();
}
void X11Compositor::performCompositing()
{
if (scene()->usesOverlayWindow() && !isOverlayWindowVisible()) {
// Return since nothing is visible.
return;
}
Compositor::performCompositing();
}
bool X11Compositor::checkForOverlayWindow(WId w) const
{
if (!scene()) {
// No scene, so it cannot be the overlay window.
return false;
}
if (!scene()->overlayWindow()) {
// No overlay window, it cannot be the overlay.
return false;
}
// Compare the window ID's.
return w == scene()->overlayWindow()->window();
}
bool X11Compositor::isOverlayWindowVisible() const
{
if (!scene()) {
return false;
}
if (!scene()->overlayWindow()) {
return false;
}
return scene()->overlayWindow()->isVisible();
}
int X11Compositor::refreshRate() const
{
return m_xrrRefreshRate;
}
void X11Compositor::updateClientCompositeBlocking(X11Client *c)
{
if (c) {
if (c->isBlockingCompositing()) {
// Do NOT attempt to call suspend(true) from within the eventchain!
if (!(m_suspended & BlockRuleSuspend))
QMetaObject::invokeMethod(this, [this]() {
suspend(BlockRuleSuspend);
}, Qt::QueuedConnection);
}
}
else if (m_suspended & BlockRuleSuspend) {
// If !c we just check if we can resume in case a blocking client was lost.
bool shouldResume = true;
for (auto it = Workspace::self()->clientList().constBegin();
it != Workspace::self()->clientList().constEnd(); ++it) {
if ((*it)->isBlockingCompositing()) {
shouldResume = false;
break;
}
}
if (shouldResume) {
// Do NOT attempt to call suspend(false) from within the eventchain!
QMetaObject::invokeMethod(this, [this]() {
resume(BlockRuleSuspend);
}, Qt::QueuedConnection);
}
}
}
X11Compositor *X11Compositor::self()
{
return qobject_cast<X11Compositor *>(Compositor::self());
}
}
// included for CompositorSelectionOwner
#include "composite.moc"
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