vitalif
/
kwin
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
kwin/composite.cpp

1044 lines
32 KiB
C++
Raw Permalink Blame History

/*
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#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 "unmanaged.h"
#include "useractions.h"
#include "utils.h"
#include "wayland_server.h"
#include "workspace.h"
#include "xcbutils.h"
#include <kwingltexture.h>
#include <KWaylandServer/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);
initializeX11();
// 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 (const KPluginMetaData &pluginMetaData : availablePlugins) {
qCDebug(KWIN_CORE) << "Available scene plugin:" << pluginMetaData.fileName();
}
for (auto type : qAsConst(supportedCompositors)) {
switch (type) {
case XRenderCompositing:
qCDebug(KWIN_CORE) << "Attempting to load the XRender scene";
break;
case OpenGLCompositing:
case OpenGL2Compositing:
qCDebug(KWIN_CORE) << "Attempting to load the OpenGL scene";
break;
case QPainterCompositing:
qCDebug(KWIN_CORE) << "Attempting to load the QPainter scene";
break;
case NoCompositing:
Q_UNREACHABLE();
}
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::initializeX11()
{
xcb_connection_t *connection = kwinApp()->x11Connection();
if (!connection) {
return;
}
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->owning()) {
// Force claim ownership.
m_selectionOwner->claim(true);
m_selectionOwner->setOwning(true);
}
xcb_composite_redirect_subwindows(connection, kwinApp()->x11RootWindow(),
XCB_COMPOSITE_REDIRECT_MANUAL);
}
void Compositor::cleanupX11()
{
delete m_selectionOwner;
m_selectionOwner = nullptr;
}
void Compositor::startupWithWorkspace()
{
connect(kwinApp(), &Application::x11ConnectionChanged,
this, &Compositor::initializeX11, Qt::UniqueConnection);
connect(kwinApp(), &Application::x11ConnectionAboutToBeDestroyed,
this, &Compositor::cleanupX11, Qt::UniqueConnection);
initializeX11();
Workspace::self()->markXStackingOrderAsDirty();
Q_ASSERT(m_scene);
connect(workspace(), &Workspace::destroyed, this, [this] { compositeTimer.stop(); });
fpsInterval = options->maxFpsInterval();
if (m_scene->syncsToVBlank()) {
// 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);
} else {
// No vsync - DO NOT set "0", would cause div-by-zero segfaults.
vBlankInterval = milliToNano(1);
}
// 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 (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 (AbstractClient *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 (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 (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 (AbstractClient *c : waylandServer()->clients()) {
m_scene->removeToplevel(c);
}
for (AbstractClient *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 : qAsConst(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 : qAsConst(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_scene->syncsToVBlank()) {
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()->unmanagedList())) {
return true;
}
if (repaintsPending(Workspace::self()->deletedList())) {
return true;
}
if (auto *server = waylandServer()) {
const auto &clients = server->clients();
auto test = [](AbstractClient *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 = 1;
if (m_scene->blocksForRetrace()) {
// TODO: make vBlankTime dynamic?!
// It's required because glXWaitVideoSync will *likely* block a full frame if one enters
// a retrace pass which can last a variable amount of time, depending on the actual screen
// Now, my ooold 19" CRT can do such retrace so that 2ms are entirely sufficient,
// while another ooold 15" TFT requires about 6ms
qint64 padding = m_timeSinceLastVBlank;
if (padding > fpsInterval) {
// We're at low repaints or spent more time in painting than the user wanted to wait
// for that frame. Align to next vblank:
padding = vBlankInterval - (padding % vBlankInterval);
} else {
// Align to the next maxFps tick:
// "remaining time of the first vsync" + "time for the other vsyncs of the frame"
padding = ((vBlankInterval - padding % vBlankInterval) +
(fpsInterval / vBlankInterval - 1) * vBlankInterval);
}
if (padding < options->vBlankTime()) {
// We'll likely miss this frame so we add one:
waitTime = nanoToMilli(padding + vBlankInterval - options->vBlankTime());
} else {
waitTime = nanoToMilli(padding - options->vBlankTime());
}
}
else { // w/o blocking vsync we just jump to the next demanded tick
if (fpsInterval > m_timeSinceLastVBlank) {
waitTime = nanoToMilli(fpsInterval - m_timeSinceLastVBlank);
if (!waitTime) {
// Will ensure we don't block out the eventloop - the system's just not faster ...
waitTime = 1;
}
}
/* else if (m_scene->syncsToVBlank() && m_timeSinceLastVBlank - fpsInterval < (vBlankInterval<<1)) {
// NOTICE - "for later" ------------------------------------------------------------------
// It can happen that we push two frames within one refresh cycle.
// Swapping will then block even with triple buffering when the GPU does not discard but
// queues frames
// now here's the mean part: if we take that as "OMG, we're late - next frame ASAP",
// there'll immediately be 2 frames in the pipe, swapping will block, we think we're
// late ... ewww
// so instead we pad to the clock again and add 2ms safety to ensure the pipe is really
// free
// NOTICE: obviously m_timeSinceLastVBlank can be too big because we're too slow as well
// So if this code was enabled, we'd needlessly half the framerate once more (15 instead of 30)
waitTime = nanoToMilli(vBlankInterval - (m_timeSinceLastVBlank - fpsInterval)%vBlankInterval) + 2;
}*/
else {
// "0" would be sufficient here, but the compositor isn't the WMs only task.
waitTime = 1;
}
}
// 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;
}
if (Workspace::self()) {
startupWithWorkspace();
} else {
connect(kwinApp(), &Application::workspaceCreated,
this, &WaylandCompositor::startupWithWorkspace);
}
}
int WaylandCompositor::refreshRate() const
{
// TODO: This makes no sense on Wayland. First step would be to atleast
// set the refresh rate to the highest available one. Second step
// would be to not use a uniform value at all but per screen.
return KWin::currentRefreshRate();
}
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"
Reference in New Issue View Git Blame Copy Permalink