113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
/*
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SPDX-FileCopyrightText: 2014 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
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*/
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#include "wayland/compositor.h"
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#include "wayland/display.h"
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#include "wayland/output.h"
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#include "wayland/seat.h"
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#include "wayland/xdgshell.h"
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#include "fakeoutput.h"
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#include <QFile>
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#include <QGuiApplication>
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#include <private/qeventdispatcher_glib_p.h>
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#include <iostream>
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#include <sys/select.h>
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#include <unistd.h>
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static int startXServer()
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{
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const QByteArray process = QByteArrayLiteral("Xwayland");
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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 X Server " << process.constData() << std::endl;
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exit(1);
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}
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pid_t pid = fork();
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if (pid == 0) {
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// child process - should be turned into Xwayland
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// writes to pipe, closes read side
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close(pipeFds[0]);
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char fdbuf[16];
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sprintf(fdbuf, "%d", pipeFds[1]);
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execlp(process.constData(), process.constData(), "-displayfd", fdbuf, (char *)nullptr);
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close(pipeFds[1]);
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exit(20);
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}
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// parent process - this is the wayland server
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// reads from pipe, closes write side
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close(pipeFds[1]);
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return pipeFds[0];
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}
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static void readDisplayFromPipe(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 XWayland" << 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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int main(int argc, char **argv)
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{
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using namespace KWin;
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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 QEventDispatcherGlib();
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QCoreApplication::setEventDispatcher(eventDispatcher);
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// first create the Server and setup with minimum to get an XWayland connected
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KWin::Display display;
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display.start();
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display.createShm();
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new CompositorInterface(&display, &display);
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new XdgShellInterface(&display, &display);
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auto outputHandle = std::make_unique<FakeOutput>();
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outputHandle->setMode(QSize(1024, 768), 60000);
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outputHandle->setPhysicalSize(QSize(10, 10));
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auto outputInterface = std::make_unique<OutputInterface>(&display, outputHandle.get());
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// starts XWayland by forking and opening a pipe
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const int pipe = startXServer();
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if (pipe == -1) {
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exit(1);
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}
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fd_set rfds;
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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do {
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eventDispatcher->processEvents(QEventLoop::WaitForMoreEvents);
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FD_ZERO(&rfds);
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FD_SET(pipe, &rfds);
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} while (select(pipe + 1, &rfds, nullptr, nullptr, &tv) == 0);
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// now Xwayland is ready and we can read the pipe to get the display
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readDisplayFromPipe(pipe);
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QGuiApplication app(argc, argv);
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SeatInterface *seat = new SeatInterface(&display);
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seat->setName(QStringLiteral("testSeat0"));
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return app.exec();
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}
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