examples/opengl/hellowindow/main.cpp

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  40
  41 #include <QGuiApplication>
  42 #include <qpa/qplatformintegration.h>
  43 #include <private/qguiapplication_p.h>
  44 #include <QScreen>
  45 #include <QThread>
  46
  47 #include "hellowindow.h"
  48
  49 int main(int argc, char **argv)
  50 {
  51     QGuiApplication app(argc, argv);
  52
  53     const bool multipleWindows =
  54         QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ThreadedOpenGL)
  55         && !QGuiApplication::arguments().contains(QLatin1String("--single"));
  56
  57     QScreen *screen = QGuiApplication::primaryScreen();
  58
  59     QRect screenGeometry = screen->availableGeometry();
  60
  61     QSurfaceFormat format;
  62     format.setDepthBufferSize(16);
  63     format.setSamples(4);
  64
  65     QPoint center = QPoint(screenGeometry.center().x(), screenGeometry.top() + 80);
  66     QSize windowSize(400, 320);
  67     int delta = 40;
  68
  69     QList<QWindow *> windows;
  70     QSharedPointer<Renderer> rendererA(new Renderer(format));
  71
  72     HelloWindow *windowA = new HelloWindow(rendererA);
  73     windowA->setGeometry(QRect(center, windowSize).translated(-windowSize.width() - delta / 2, 0));
  74     windowA->setWindowTitle(QLatin1String("Thread A - Context A"));
  75     windowA->setVisible(true);
  76     windows.prepend(windowA);
  77
  78     QList<QThread *> renderThreads;
  79     if (multipleWindows) {
  80         QSharedPointer<Renderer> rendererB(new Renderer(format, rendererA.data()));
  81
  82         QThread *renderThread = new QThread;
  83         rendererB->moveToThread(renderThread);
  84         renderThreads << renderThread;
  85
  86         HelloWindow *windowB = new HelloWindow(rendererA);
  87         windowB->setGeometry(QRect(center, windowSize).translated(delta / 2, 0));
  88         windowB->setWindowTitle(QLatin1String("Thread A - Context A"));
  89         windowB->setVisible(true);
  90         windows.prepend(windowB);
  91
  92         HelloWindow *windowC = new HelloWindow(rendererB);
  93         windowC->setGeometry(QRect(center, windowSize).translated(-windowSize.width() / 2, windowSize.height() + delta));
  94         windowC->setWindowTitle(QLatin1String("Thread B - Context B"));
  95         windowC->setVisible(true);
  96         windows.prepend(windowC);
  97
  98         for (int i = 1; i < QGuiApplication::screens().size(); ++i) {
  99             QScreen *screen = QGuiApplication::screens().at(i);
 100             QSharedPointer<Renderer> renderer(new Renderer(format, rendererA.data(), screen));
 101
 102             renderThread = new QThread;
 103             renderer->moveToThread(renderThread);
 104             renderThreads.prepend(renderThread);
 105
 106             QRect screenGeometry = screen->availableGeometry();
 107             QPoint center = screenGeometry.center();
 108
 109             QSize windowSize = screenGeometry.size() * 0.8;
 110
 111             HelloWindow *window = new HelloWindow(renderer);
 112             window->setScreen(screen);
 113             window->setGeometry(QRect(center, windowSize).translated(-windowSize.width() / 2, -windowSize.height() / 2));
 114
 115             QChar id = QChar('B' + i);
 116             window->setWindowTitle(QLatin1String("Thread ") + id + QLatin1String(" - Context ") + id);
 117             window->setVisible(true);
 118             windows.prepend(window);
 119         }
 120     }
 121
 122     for (int i = 0; i < renderThreads.size(); ++i) {
 123         QObject::connect(qGuiApp, SIGNAL(lastWindowClosed()), renderThreads.at(i), SLOT(quit()));
 124         renderThreads.at(i)->start();
 125     }
 126
 127     const int exitValue = app.exec();
 128
 129     for (int i = 0; i < renderThreads.size(); ++i)
 130         renderThreads.at(i)->wait();
 131     qDeleteAll(windows);
 132     qDeleteAll(renderThreads);
 133
 134     return exitValue;
 135 }