eed5531b4f
The change to reflect the available plugins in the command line options had side effects as that made it impossible to start KWin if certain plugins are not available. This change ensures that we only check the option value if they are set in the first place. In addition the multi checks to verify whether combinations are valid is removed as that makes in reality no sense any more (only few plugins installed by distros) and doesn't scale any more with the increasing numbers of backends.
618 lines
23 KiB
C++
618 lines
23 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 <QAbstractEventDispatcher>
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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 <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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#include <iomanip>
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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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m_environment.insert(QStringLiteral("DISPLAY"), QString::fromUtf8(qgetenv("DISPLAY")));
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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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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(m_environment);
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p->start(application);
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}
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}
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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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}
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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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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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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 const QString s_virtualPlugin = QStringLiteral("KWinWaylandVirtualBackend");
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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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KWin::Application::setupMalloc();
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KWin::Application::setupLocalizedString();
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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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// enforce our internal qpa plugin, unfortunately command line switch has precedence
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setenv("QT_QPA_PLATFORM", "wayland-org.kde.kwin.qpa", 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("QSG_RENDER_LOOP", "basic");
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KWin::ApplicationWayland a(argc, argv);
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a.setupTranslator();
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KWin::Application::createAboutData();
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const auto availablePlugins = KPluginLoader::findPlugins(QStringLiteral("org.kde.kwin.waylandbackends"));
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auto hasPlugin = [&availablePlugins] (const QString &name) {
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return std::any_of(availablePlugins.begin(), availablePlugins.end(),
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[name] (const KPluginMetaData &plugin) {
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return plugin.pluginId() == name;
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}
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);
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};
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const bool hasWindowedOption = hasPlugin(KWin::s_x11Plugin) || hasPlugin(KWin::s_waylandPlugin);
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const bool hasSizeOption = hasPlugin(KWin::s_x11Plugin) || hasPlugin(KWin::s_virtualPlugin);
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const bool hasX11Option = hasPlugin(KWin::s_x11Plugin);
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const bool hasVirtualOption = hasPlugin(KWin::s_virtualPlugin);
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const bool hasWaylandOption = hasPlugin(KWin::s_waylandPlugin);
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const bool hasFramebufferOption = hasPlugin(KWin::s_fbdevPlugin);
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#if HAVE_DRM
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const bool hasDrmOption = hasPlugin(KWin::s_drmPlugin);
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#endif
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#if HAVE_LIBHYBRIS
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const bool hasHwcomposerOption = hasPlugin(KWin::s_hwcomposerPlugin);
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#endif
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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."),
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QStringLiteral("display"));
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QCommandLineOption waylandDisplayOption(QStringLiteral("wayland-display"),
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i18n("The Wayland Display to use in windowed mode on platform Wayland."),
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QStringLiteral("display"));
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QCommandLineOption virtualFbOption(QStringLiteral("virtual"), i18n("Render to a virtual framebuffer."));
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QCommandLineOption widthOption(QStringLiteral("width"),
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i18n("The width for windowed mode. Default width is 1024."),
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QStringLiteral("width"));
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widthOption.setDefaultValue(QString::number(1024));
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QCommandLineOption heightOption(QStringLiteral("height"),
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i18n("The height for windowed mode. Default height is 768."),
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QStringLiteral("height"));
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heightOption.setDefaultValue(QString::number(768));
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QCommandLineParser parser;
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a.setupCommandLine(&parser);
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parser.addOption(xwaylandOption);
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parser.addOption(waylandSocketOption);
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if (hasWindowedOption) {
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parser.addOption(windowedOption);
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}
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if (hasX11Option) {
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parser.addOption(x11DisplayOption);
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}
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if (hasWaylandOption) {
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parser.addOption(waylandDisplayOption);
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}
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if (hasFramebufferOption) {
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parser.addOption(framebufferOption);
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parser.addOption(framebufferDeviceOption);
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}
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if (hasVirtualOption) {
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parser.addOption(virtualFbOption);
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}
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if (hasSizeOption) {
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parser.addOption(widthOption);
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parser.addOption(heightOption);
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}
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#if HAVE_LIBHYBRIS
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QCommandLineOption hwcomposerOption(QStringLiteral("hwcomposer"), i18n("Use libhybris hwcomposer"));
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if (hasHwcomposerOption) {
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parser.addOption(hwcomposerOption);
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}
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#endif
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#if HAVE_INPUT
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QCommandLineOption libinputOption(QStringLiteral("libinput"),
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i18n("Enable libinput support for input events processing. Note: never use in a nested session."));
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parser.addOption(libinputOption);
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#endif
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#if HAVE_DRM
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QCommandLineOption drmOption(QStringLiteral("drm"), i18n("Render through drm node."));
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if (hasDrmOption) {
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parser.addOption(drmOption);
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}
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#endif
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QCommandLineOption inputMethodOption(QStringLiteral("inputmethod"),
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i18n("Input method that KWin starts."),
|
|
QStringLiteral("path/to/imserver"));
|
|
parser.addOption(inputMethodOption);
|
|
|
|
QCommandLineOption listBackendsOption(QStringLiteral("list-backends"),
|
|
i18n("List all available backends and quit."));
|
|
parser.addOption(listBackendsOption);
|
|
|
|
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 (parser.isSet(listBackendsOption)) {
|
|
for (const auto &plugin: availablePlugins) {
|
|
std::cout << std::setw(40) << std::left << qPrintable(plugin.name()) << qPrintable(plugin.description()) << std::endl;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if HAVE_INPUT
|
|
KWin::Application::setUseLibinput(parser.isSet(libinputOption));
|
|
#endif
|
|
|
|
QString pluginName;
|
|
QSize initialWindowSize;
|
|
QByteArray deviceIdentifier;
|
|
|
|
#if HAVE_DRM
|
|
if (hasDrmOption && parser.isSet(drmOption)) {
|
|
pluginName = KWin::s_drmPlugin;
|
|
}
|
|
#endif
|
|
|
|
if (hasSizeOption) {
|
|
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 (hasWindowedOption && parser.isSet(windowedOption)) {
|
|
if (hasX11Option && parser.isSet(x11DisplayOption)) {
|
|
deviceIdentifier = parser.value(x11DisplayOption).toUtf8();
|
|
} else if (!(hasWaylandOption && parser.isSet(waylandDisplayOption))) {
|
|
deviceIdentifier = qgetenv("DISPLAY");
|
|
}
|
|
if (!deviceIdentifier.isEmpty()) {
|
|
pluginName = KWin::s_x11Plugin;
|
|
} else if (hasWaylandOption) {
|
|
if (parser.isSet(waylandDisplayOption)) {
|
|
deviceIdentifier = parser.value(waylandDisplayOption).toUtf8();
|
|
} else {
|
|
deviceIdentifier = qgetenv("WAYLAND_DISPLAY");
|
|
}
|
|
if (!deviceIdentifier.isEmpty()) {
|
|
pluginName = KWin::s_waylandPlugin;
|
|
}
|
|
}
|
|
}
|
|
if (hasFramebufferOption && parser.isSet(framebufferOption)) {
|
|
pluginName = KWin::s_fbdevPlugin;
|
|
deviceIdentifier = parser.value(framebufferDeviceOption).toUtf8();
|
|
}
|
|
#if HAVE_LIBHYBRIS
|
|
if (hasHwcomposerOption && parser.isSet(hwcomposerOption)) {
|
|
pluginName = KWin::s_hwcomposerPlugin;
|
|
}
|
|
#endif
|
|
if (hasVirtualOption && parser.isSet(virtualFbOption)) {
|
|
pluginName = KWin::s_virtualPlugin;
|
|
}
|
|
|
|
if (pluginName.isEmpty()) {
|
|
std::cerr << "No backend specified through command line argument, trying auto resolution" << std::endl;
|
|
pluginName = KWin::automaticBackendSelection();
|
|
}
|
|
|
|
auto pluginIt = std::find_if(availablePlugins.begin(), availablePlugins.end(),
|
|
[&pluginName] (const KPluginMetaData &plugin) {
|
|
return plugin.pluginId() == pluginName;
|
|
}
|
|
);
|
|
if (pluginIt == availablePlugins.end()) {
|
|
std::cerr << "FATAL ERROR: could not find a backend" << std::endl;
|
|
return 1;
|
|
}
|
|
|
|
// TODO: create backend without having the server running
|
|
KWin::WaylandServer *server = KWin::WaylandServer::create(&a);
|
|
server->init(parser.value(waylandSocketOption).toUtf8());
|
|
|
|
if (qobject_cast<KWin::AbstractBackend*>((*pluginIt).instantiate())) {
|
|
#if HAVE_INPUT
|
|
// check whether it needs libinput
|
|
const QJsonObject &metaData = (*pluginIt).rawData();
|
|
auto it = metaData.find(QStringLiteral("input"));
|
|
if (it != metaData.constEnd()) {
|
|
if ((*it).isBool()) {
|
|
if (!(*it).toBool()) {
|
|
std::cerr << "Backend does not support input, enforcing libinput support" << std::endl;
|
|
KWin::Application::setUseLibinput(true);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
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);
|
|
environment.insert(QStringLiteral("WAYLAND_DISPLAY"), server->display()->socketName());
|
|
a.setProcessStartupEnvironment(environment);
|
|
a.setStartXwayland(parser.isSet(xwaylandOption));
|
|
a.setApplicationsToStart(parser.positionalArguments());
|
|
a.setInputMethodServerToStart(parser.value(inputMethodOption));
|
|
a.start();
|
|
|
|
return a.exec();
|
|
}
|