a4ca6f196e
kdeinit_executable doesn't make sense in the case of kwin_wayland as start_kdeinit_wrapper will be executed after kwin_wayland thus the framework doesn't work.
640 lines
24 KiB
C++
640 lines
24 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) 2014 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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#include "main_wayland.h"
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#include "workspace.h"
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#include <config-kwin.h>
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// kwin
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#include "abstract_backend.h"
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#include "wayland_server.h"
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#include "xcbutils.h"
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// KWayland
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#include <KWayland/Server/display.h>
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#include <KWayland/Server/seat_interface.h>
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// KDE
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#include <KLocalizedString>
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#include <KPluginLoader>
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#include <KPluginMetaData>
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// Qt
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#include <qplatformdefs.h>
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#include <QCommandLineParser>
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#include <QtConcurrentRun>
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#include <QFile>
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#include <QFutureWatcher>
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#include <qpa/qwindowsysteminterface.h>
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#include <QProcess>
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#include <QSocketNotifier>
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#include <QThread>
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#include <QDebug>
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#include <QWindow>
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// system
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif // HAVE_UNISTD_H
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#include <iostream>
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namespace KWin
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{
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static void sighandler(int)
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{
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QApplication::exit();
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}
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static void readDisplay(int pipe);
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//************************************
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// ApplicationWayland
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//************************************
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ApplicationWayland::ApplicationWayland(int &argc, char **argv)
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: Application(OperationModeWaylandAndX11, argc, argv)
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{
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}
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ApplicationWayland::~ApplicationWayland()
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{
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destroyCompositor();
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destroyWorkspace();
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if (x11Connection()) {
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Xcb::setInputFocus(XCB_INPUT_FOCUS_POINTER_ROOT);
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destroyAtoms();
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xcb_disconnect(x11Connection());
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}
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if (m_xwaylandProcess) {
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m_xwaylandProcess->terminate();
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m_xwaylandProcess->waitForFinished();
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}
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}
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void ApplicationWayland::performStartup()
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{
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setOperationMode(m_startXWayland ? OperationModeXwayland : OperationModeWaylandAndX11);
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// first load options - done internally by a different thread
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createOptions();
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waylandServer()->createInternalConnection();
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// try creating the Wayland Backend
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createInput();
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createBackend();
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}
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void ApplicationWayland::createBackend()
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{
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AbstractBackend *backend = waylandServer()->backend();
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connect(backend, &AbstractBackend::screensQueried, this, &ApplicationWayland::continueStartupWithScreens);
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connect(backend, &AbstractBackend::initFailed, this,
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[] () {
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std::cerr << "FATAL ERROR: backend failed to initialize, exiting now" << std::endl;
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::exit(1);
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}
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);
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backend->init();
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}
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void ApplicationWayland::continueStartupWithScreens()
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{
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disconnect(waylandServer()->backend(), &AbstractBackend::screensQueried, this, &ApplicationWayland::continueStartupWithScreens);
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createScreens();
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waylandServer()->initOutputs();
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if (!m_startXWayland) {
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continueStartupWithX();
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return;
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}
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createCompositor();
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startXwaylandServer();
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}
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void ApplicationWayland::continueStartupWithX()
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{
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createX11Connection();
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xcb_connection_t *c = x11Connection();
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if (!c) {
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// about to quit
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return;
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}
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QSocketNotifier *notifier = new QSocketNotifier(xcb_get_file_descriptor(c), QSocketNotifier::Read, this);
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auto processXcbEvents = [this, c] {
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while (auto event = xcb_poll_for_event(c)) {
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updateX11Time(event);
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long result = 0;
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if (QThread::currentThread()->eventDispatcher()->filterNativeEvent(QByteArrayLiteral("xcb_generic_event_t"), event, &result)) {
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free(event);
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continue;
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}
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if (Workspace::self()) {
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Workspace::self()->workspaceEvent(event);
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}
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free(event);
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}
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xcb_flush(c);
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};
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connect(notifier, &QSocketNotifier::activated, this, processXcbEvents);
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connect(QThread::currentThread()->eventDispatcher(), &QAbstractEventDispatcher::aboutToBlock, this, processXcbEvents);
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connect(QThread::currentThread()->eventDispatcher(), &QAbstractEventDispatcher::awake, this, processXcbEvents);
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// create selection owner for WM_S0 - magic X display number expected by XWayland
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KSelectionOwner owner("WM_S0", c, x11RootWindow());
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owner.claim(true);
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createAtoms();
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setupEventFilters();
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// Check whether another windowmanager is running
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const uint32_t maskValues[] = {XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT};
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ScopedCPointer<xcb_generic_error_t> redirectCheck(xcb_request_check(connection(),
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xcb_change_window_attributes_checked(connection(),
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rootWindow(),
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XCB_CW_EVENT_MASK,
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maskValues)));
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if (!redirectCheck.isNull()) {
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fputs(i18n("kwin_wayland: an X11 window manager is running on the X11 Display.\n").toLocal8Bit().constData(), stderr);
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::exit(1);
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}
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if (!m_inputMethodServerToStart.isEmpty()) {
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int socket = dup(waylandServer()->createInputMethodConnection());
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if (socket >= 0) {
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QProcessEnvironment environment = m_environment;
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environment.insert(QStringLiteral("WAYLAND_SOCKET"), QByteArray::number(socket));
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environment.insert(QStringLiteral("QT_QPA_PLATFORM"), QStringLiteral("wayland"));
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environment.remove("DISPLAY");
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environment.remove("WAYLAND_DISPLAY");
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QProcess *p = new QProcess(this);
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p->setProcessEnvironment(environment);
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p->start(m_inputMethodServerToStart);
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p->waitForStarted();
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}
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}
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// start the applications passed to us as command line arguments
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if (!m_applicationsToStart.isEmpty()) {
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QProcessEnvironment environment = m_environment;
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environment.insert(QStringLiteral("DISPLAY"), QString::fromUtf8(qgetenv("DISPLAY")));
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for (const QString &application: m_applicationsToStart) {
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// note: this will kill the started process when we exit
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// this is going to happen anyway as we are the wayland and X server the app connects to
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QProcess *p = new QProcess(this);
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p->setProcessEnvironment(environment);
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p->start(application);
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}
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}
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// HACK: create a QWindow in a thread to force QtWayland to create the client buffer integration
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// this performs an eglInitialize which would block as it does a roundtrip to the Wayland server
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// in the main thread. By moving into a thread we get the initialize without hitting the problem
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// This needs to be done before creating the Workspace as from inside Workspace the dangerous code
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// gets hit in the main thread
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QFutureWatcher<void> *eglInitWatcher = new QFutureWatcher<void>(this);
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connect(eglInitWatcher, &QFutureWatcher<void>::finished, this,
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[this, eglInitWatcher] {
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eglInitWatcher->deleteLater();
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createWorkspace();
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Xcb::sync(); // Trigger possible errors, there's still a chance to abort
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notifyKSplash();
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waylandServer()->createDummyQtWindow();
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}
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);
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eglInitWatcher->setFuture(QtConcurrent::run([] {
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QWindow w;
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w.setSurfaceType(QSurface::RasterGLSurface);
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w.create();
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}));
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}
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void ApplicationWayland::createX11Connection()
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{
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int screenNumber = 0;
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xcb_connection_t *c = nullptr;
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if (m_xcbConnectionFd == -1) {
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c = xcb_connect(nullptr, &screenNumber);
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} else {
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c = xcb_connect_to_fd(m_xcbConnectionFd, nullptr);
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}
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if (int error = xcb_connection_has_error(c)) {
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std::cerr << "FATAL ERROR: Creating connection to XServer failed: " << error << std::endl;
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exit(1);
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return;
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}
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setX11Connection(c);
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// we don't support X11 multi-head in Wayland
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setX11ScreenNumber(screenNumber);
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setX11RootWindow(defaultScreen()->root);
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}
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bool ApplicationWayland::notify(QObject *o, QEvent *e)
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{
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if (QWindow *w = qobject_cast< QWindow* >(o)) {
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if (e->type() == QEvent::Expose) {
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// ensure all Wayland events both on client and server side are dispatched
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// otherwise it is possible that Qt starts rendering and blocks the main gui thread
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// as it waits for the callback of the last frame
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waylandServer()->dispatch();
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}
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if (e->type() == QEvent::Show) {
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// on QtWayland windows with X11BypassWindowManagerHint are not shown, thus we need to remove it
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// as the flag is interpreted only before the PlatformWindow is created we need to destroy the window first
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if (w->flags() & Qt::X11BypassWindowManagerHint) {
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w->setFlags(w->flags() & ~Qt::X11BypassWindowManagerHint);
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w->destroy();
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w->show();
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return false;
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}
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}
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}
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return Application::notify(o, e);
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}
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void ApplicationWayland::startXwaylandServer()
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{
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int pipeFds[2];
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if (pipe(pipeFds) != 0) {
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std::cerr << "FATAL ERROR failed to create pipe to start Xwayland " << std::endl;
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exit(1);
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return;
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}
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int sx[2];
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if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sx) < 0) {
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std::cerr << "FATAL ERROR: failed to open socket to open XCB connection" << std::endl;
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exit(1);
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return;
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}
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int fd = dup(sx[1]);
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if (fd < 0) {
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std::cerr << "FATAL ERROR: failed to open socket to open XCB connection" << std::endl;
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exit(20);
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return;
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}
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const int waylandSocket = waylandServer()->createXWaylandConnection();
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if (waylandSocket == -1) {
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std::cerr << "FATAL ERROR: failed to open socket for Xwayland" << std::endl;
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exit(1);
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return;
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}
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const int wlfd = dup(waylandSocket);
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if (wlfd < 0) {
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std::cerr << "FATAL ERROR: failed to open socket for Xwayland" << std::endl;
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exit(20);
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return;
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}
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m_xcbConnectionFd = sx[0];
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m_xwaylandProcess = new QProcess(kwinApp());
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m_xwaylandProcess->setProgram(QStringLiteral("Xwayland"));
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QProcessEnvironment env = m_environment;
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env.insert("WAYLAND_SOCKET", QByteArray::number(wlfd));
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m_xwaylandProcess->setProcessEnvironment(env);
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m_xwaylandProcess->setArguments({QStringLiteral("-displayfd"),
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QString::number(pipeFds[1]),
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QStringLiteral("-rootless"),
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QStringLiteral("-wm"),
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QString::number(fd)});
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connect(m_xwaylandProcess, static_cast<void (QProcess::*)(QProcess::ProcessError)>(&QProcess::error), this,
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[] (QProcess::ProcessError error) {
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if (error == QProcess::FailedToStart) {
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std::cerr << "FATAL ERROR: failed to start Xwayland" << std::endl;
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} else {
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std::cerr << "FATAL ERROR: Xwayland failed, going to exit now" << std::endl;
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}
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exit(1);
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}
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);
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const int xDisplayPipe = pipeFds[0];
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connect(m_xwaylandProcess, &QProcess::started, this,
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[this, xDisplayPipe] {
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QFutureWatcher<void> *watcher = new QFutureWatcher<void>(this);
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QObject::connect(watcher, &QFutureWatcher<void>::finished, this, &ApplicationWayland::continueStartupWithX, Qt::QueuedConnection);
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QObject::connect(watcher, &QFutureWatcher<void>::finished, watcher, &QFutureWatcher<void>::deleteLater, Qt::QueuedConnection);
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watcher->setFuture(QtConcurrent::run(readDisplay, xDisplayPipe));
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}
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);
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m_xwaylandProcess->start();
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close(pipeFds[1]);
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}
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static void readDisplay(int pipe)
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{
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QFile readPipe;
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if (!readPipe.open(pipe, QIODevice::ReadOnly)) {
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std::cerr << "FATAL ERROR failed to open pipe to start X Server" << std::endl;
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exit(1);
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}
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QByteArray displayNumber = readPipe.readLine();
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displayNumber.prepend(QByteArray(":"));
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displayNumber.remove(displayNumber.size() -1, 1);
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std::cout << "X-Server started on display " << displayNumber.constData() << std::endl;
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setenv("DISPLAY", displayNumber.constData(), true);
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// close our pipe
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close(pipe);
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}
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EventDispatcher::EventDispatcher(QObject *parent)
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: QEventDispatcherUNIX(parent)
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{
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}
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EventDispatcher::~EventDispatcher() = default;
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bool EventDispatcher::processEvents(QEventLoop::ProcessEventsFlags flags)
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{
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waylandServer()->dispatch();
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const bool didSendEvents = QEventDispatcherUNIX::processEvents(flags);
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return QWindowSystemInterface::sendWindowSystemEvents(flags) || didSendEvents;
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}
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bool EventDispatcher::hasPendingEvents()
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{
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return QEventDispatcherUNIX::hasPendingEvents() || QWindowSystemInterface::windowSystemEventsQueued();
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}
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static const QString s_waylandPlugin = QStringLiteral("KWinWaylandWaylandBackend");
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static const QString s_x11Plugin = QStringLiteral("KWinWaylandX11Backend");
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static const QString s_fbdevPlugin = QStringLiteral("KWinWaylandFbdevBackend");
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#if HAVE_DRM
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static const QString s_drmPlugin = QStringLiteral("KWinWaylandDrmBackend");
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#endif
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#if HAVE_LIBHYBRIS
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static const QString s_hwcomposerPlugin = QStringLiteral("KWinWaylandHwcomposerBackend");
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#endif
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static QString automaticBackendSelection()
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{
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if (qEnvironmentVariableIsSet("WAYLAND_DISPLAY")) {
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return s_waylandPlugin;
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}
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if (qEnvironmentVariableIsSet("DISPLAY")) {
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return s_x11Plugin;
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}
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#if HAVE_LIBHYBRIS
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if (qEnvironmentVariableIsSet("ANDROID_ROOT")) {
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return s_hwcomposerPlugin;
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}
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#endif
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#if HAVE_DRM
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return s_drmPlugin;
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#endif
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return s_fbdevPlugin;
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}
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} // namespace
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int main(int argc, char * argv[])
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{
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// process command line arguments to figure out whether we have to start Xwayland and the Wayland socket
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QByteArray waylandSocket;
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for (int i = 1; i < argc; ++i) {
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QByteArray arg = QByteArray::fromRawData(argv[i], qstrlen(argv[i]));
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if (arg == "--socket" || arg == "-s") {
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if (++i < argc) {
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waylandSocket = QByteArray::fromRawData(argv[i], qstrlen(argv[i]));
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}
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continue;
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}
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if (arg.startsWith("--socket=")) {
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waylandSocket = arg.mid(9);
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}
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}
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// set our own event dispatcher to be able to dispatch events before the event loop is started
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QAbstractEventDispatcher *eventDispatcher = new KWin::EventDispatcher();
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QCoreApplication::setEventDispatcher(eventDispatcher);
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KWin::WaylandServer *server = KWin::WaylandServer::create(nullptr);
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server->init(waylandSocket);
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KWin::Application::setupMalloc();
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KWin::Application::setupLocalizedString();
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KWin::Application::setupLoggingCategoryFilters();
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if (signal(SIGTERM, KWin::sighandler) == SIG_IGN)
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signal(SIGTERM, SIG_IGN);
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if (signal(SIGINT, KWin::sighandler) == SIG_IGN)
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signal(SIGINT, SIG_IGN);
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if (signal(SIGHUP, KWin::sighandler) == SIG_IGN)
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signal(SIGHUP, SIG_IGN);
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// ensure that no thread takes SIGUSR
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sigset_t userSiganls;
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sigemptyset(&userSiganls);
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sigaddset(&userSiganls, SIGUSR1);
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sigaddset(&userSiganls, SIGUSR2);
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pthread_sigmask(SIG_BLOCK, &userSiganls, nullptr);
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QProcessEnvironment environment = QProcessEnvironment::systemEnvironment();
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environment.insert(QStringLiteral("WAYLAND_DISPLAY"), server->display()->socketName());
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// enforce wayland plugin, unfortunately command line switch has precedence
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setenv("QT_QPA_PLATFORM", "wayland", true);
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#if (QT_VERSION < QT_VERSION_CHECK(5, 4, 2))
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// TODO: remove warning once we depend on Qt 5.5
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qWarning() << "QtWayland 5.4.2 required, application might freeze if not present!";
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#endif
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qunsetenv("QT_DEVICE_PIXEL_RATIO");
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qunsetenv("QT_IM_MODULE");
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qputenv("WAYLAND_SOCKET", QByteArray::number(server->createQtConnection()));
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qputenv("QT_WAYLAND_DISABLE_WINDOWDECORATION", "1");
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KWin::ApplicationWayland a(argc, argv);
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a.setupTranslator();
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a.setProcessStartupEnvironment(environment);
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server->setParent(&a);
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KWin::Application::createAboutData();
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QCommandLineOption xwaylandOption(QStringLiteral("xwayland"),
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i18n("Start a rootless Xwayland server."));
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QCommandLineOption waylandSocketOption(QStringList{QStringLiteral("s"), QStringLiteral("socket")},
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i18n("Name of the Wayland socket to listen on. If not set \"wayland-0\" is used."),
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QStringLiteral("socket"));
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QCommandLineOption windowedOption(QStringLiteral("windowed"),
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i18n("Use a nested compositor in windowed mode."));
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QCommandLineOption framebufferOption(QStringLiteral("framebuffer"),
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i18n("Render to framebuffer."));
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QCommandLineOption framebufferDeviceOption(QStringLiteral("fb-device"),
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i18n("The framebuffer device to render to."),
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QStringLiteral("fbdev"));
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framebufferDeviceOption.setDefaultValue(QStringLiteral("/dev/fb0"));
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QCommandLineOption x11DisplayOption(QStringLiteral("x11-display"),
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i18n("The X11 Display to use in windowed mode on platform X11."),
|
|
QStringLiteral("display"));
|
|
QCommandLineOption waylandDisplayOption(QStringLiteral("wayland-display"),
|
|
i18n("The Wayland Display to use in windowed mode on platform Wayland."),
|
|
QStringLiteral("display"));
|
|
QCommandLineOption widthOption(QStringLiteral("width"),
|
|
i18n("The width for windowed mode. Default width is 1024."),
|
|
QStringLiteral("width"));
|
|
widthOption.setDefaultValue(QString::number(1024));
|
|
QCommandLineOption heightOption(QStringLiteral("height"),
|
|
i18n("The height for windowed mode. Default height is 768."),
|
|
QStringLiteral("height"));
|
|
heightOption.setDefaultValue(QString::number(768));
|
|
|
|
QCommandLineParser parser;
|
|
a.setupCommandLine(&parser);
|
|
parser.addOption(xwaylandOption);
|
|
parser.addOption(waylandSocketOption);
|
|
parser.addOption(windowedOption);
|
|
parser.addOption(x11DisplayOption);
|
|
parser.addOption(waylandDisplayOption);
|
|
parser.addOption(framebufferOption);
|
|
parser.addOption(framebufferDeviceOption);
|
|
parser.addOption(widthOption);
|
|
parser.addOption(heightOption);
|
|
#if HAVE_LIBHYBRIS
|
|
QCommandLineOption hwcomposerOption(QStringLiteral("hwcomposer"), i18n("Use libhybris hwcomposer"));
|
|
parser.addOption(hwcomposerOption);
|
|
#endif
|
|
#if HAVE_INPUT
|
|
QCommandLineOption libinputOption(QStringLiteral("libinput"),
|
|
i18n("Enable libinput support for input events processing. Note: never use in a nested session."));
|
|
parser.addOption(libinputOption);
|
|
#endif
|
|
#if HAVE_DRM
|
|
QCommandLineOption drmOption(QStringLiteral("drm"), i18n("Render through drm node."));
|
|
parser.addOption(drmOption);
|
|
#endif
|
|
|
|
QCommandLineOption inputMethodOption(QStringLiteral("inputmethod"),
|
|
i18n("Input method that KWin starts."),
|
|
QStringLiteral("path/to/imserver"));
|
|
parser.addOption(inputMethodOption);
|
|
|
|
parser.addPositionalArgument(QStringLiteral("applications"),
|
|
i18n("Applications to start once Wayland and Xwayland server are started"),
|
|
QStringLiteral("[/path/to/application...]"));
|
|
|
|
parser.process(a);
|
|
a.processCommandLine(&parser);
|
|
|
|
#if HAVE_INPUT
|
|
KWin::Application::setUseLibinput(parser.isSet(libinputOption));
|
|
#endif
|
|
|
|
QString pluginName;
|
|
QSize initialWindowSize;
|
|
QByteArray deviceIdentifier;
|
|
if (parser.isSet(windowedOption) && parser.isSet(framebufferOption)) {
|
|
std::cerr << "FATAL ERROR Cannot have both --windowed and --framebuffer" << std::endl;
|
|
return 1;
|
|
}
|
|
#if HAVE_DRM
|
|
if (parser.isSet(drmOption) && (parser.isSet(windowedOption) || parser.isSet(framebufferOption))) {
|
|
std::cerr << "FATAL ERROR Cannot have both --windowed/--framebuffer and --drm" << std::endl;
|
|
return 1;
|
|
}
|
|
if (parser.isSet(drmOption)) {
|
|
pluginName = KWin::s_drmPlugin;
|
|
}
|
|
#endif
|
|
|
|
|
|
bool ok = false;
|
|
const int width = parser.value(widthOption).toInt(&ok);
|
|
if (!ok) {
|
|
std::cerr << "FATAL ERROR incorrect value for width" << std::endl;
|
|
return 1;
|
|
}
|
|
const int height = parser.value(heightOption).toInt(&ok);
|
|
if (!ok) {
|
|
std::cerr << "FATAL ERROR incorrect value for height" << std::endl;
|
|
return 1;
|
|
}
|
|
initialWindowSize = QSize(width, height);
|
|
|
|
if (parser.isSet(windowedOption)) {
|
|
if (parser.isSet(x11DisplayOption)) {
|
|
deviceIdentifier = parser.value(x11DisplayOption).toUtf8();
|
|
} else if (!parser.isSet(waylandDisplayOption)) {
|
|
deviceIdentifier = qgetenv("DISPLAY");
|
|
}
|
|
if (!deviceIdentifier.isEmpty()) {
|
|
pluginName = KWin::s_x11Plugin;
|
|
} else {
|
|
if (parser.isSet(waylandDisplayOption)) {
|
|
deviceIdentifier = parser.value(waylandDisplayOption).toUtf8();
|
|
} else if (!parser.isSet(x11DisplayOption)) {
|
|
deviceIdentifier = qgetenv("WAYLAND_DISPLAY");
|
|
}
|
|
if (!deviceIdentifier.isEmpty()) {
|
|
pluginName = KWin::s_waylandPlugin;
|
|
}
|
|
}
|
|
}
|
|
if (parser.isSet(framebufferOption)) {
|
|
pluginName = KWin::s_fbdevPlugin;
|
|
deviceIdentifier = parser.value(framebufferDeviceOption).toUtf8();
|
|
}
|
|
#if HAVE_LIBHYBRIS
|
|
if (parser.isSet(hwcomposerOption)) {
|
|
pluginName = KWin::s_hwcomposerPlugin;
|
|
}
|
|
#endif
|
|
|
|
if (pluginName.isEmpty()) {
|
|
std::cerr << "No backend specified through command line argument, trying auto resolution" << std::endl;
|
|
pluginName = KWin::automaticBackendSelection();
|
|
}
|
|
|
|
const auto pluginCandidates = KPluginLoader::findPlugins(QStringLiteral("org.kde.kwin.waylandbackends"),
|
|
[&pluginName] (const KPluginMetaData &plugin) {
|
|
return plugin.pluginId() == pluginName;
|
|
}
|
|
);
|
|
if (pluginCandidates.isEmpty()) {
|
|
std::cerr << "FATAL ERROR: could not find a backend" << std::endl;
|
|
return 1;
|
|
}
|
|
for (const auto &candidate: pluginCandidates) {
|
|
if (qobject_cast<KWin::AbstractBackend*>(candidate.instantiate())) {
|
|
break;
|
|
}
|
|
}
|
|
if (!server->backend()) {
|
|
std::cerr << "FATAL ERROR: could not instantiate a backend" << std::endl;
|
|
return 1;
|
|
}
|
|
server->backend()->setParent(server);
|
|
if (!deviceIdentifier.isEmpty()) {
|
|
server->backend()->setDeviceIdentifier(deviceIdentifier);
|
|
}
|
|
if (initialWindowSize.isValid()) {
|
|
server->backend()->setInitialWindowSize(initialWindowSize);
|
|
}
|
|
|
|
QObject::connect(&a, &KWin::Application::workspaceCreated, server, &KWin::WaylandServer::initWorkspace);
|
|
a.setStartXwayland(parser.isSet(xwaylandOption));
|
|
a.setApplicationsToStart(parser.positionalArguments());
|
|
a.setInputMethodServerToStart(parser.value(inputMethodOption));
|
|
a.start();
|
|
|
|
return a.exec();
|
|
}
|