C++ QWindow::create方法代码示例

static QSurface *createSurface(int surfaceClass)
{
    if (surfaceClass == int(QSurface::Window)) {
        QWindow *window = new QWindow;
        window->setSurfaceType(QWindow::OpenGLSurface);
        window->setGeometry(0, 0, 10, 10);
        window->create();
        return window;
    } else if (surfaceClass == int(QSurface::Offscreen)) {
        // Create a window and get the format from that.  For example, if an EGL
        // implementation provides 565 and 888 configs for PBUFFER_BIT but only
        // 888 for WINDOW_BIT, we may end up with a pbuffer surface that is
        // incompatible with the context since it could choose the 565 while the
        // window and the context uses a config with 888.
        static QSurfaceFormat format;
        if (format.redBufferSize() == -1) {
            QWindow *window = new QWindow;
            window->setSurfaceType(QWindow::OpenGLSurface);
            window->setGeometry(0, 0, 10, 10);
            window->create();
            format = window->format();
            delete window;
        }
        QOffscreenSurface *offscreenSurface = new QOffscreenSurface;
        offscreenSurface->setFormat(format);
        offscreenSurface->create();
        return offscreenSurface;
    }
    return 0;
}

void dumpGlInfo(QTextStream &str, bool listExtensions)
{
    QOpenGLContext context;
    if (context.create()) {
#  ifdef QT_OPENGL_DYNAMIC
        str << "Dynamic GL ";
#  endif
        switch (context.openGLModuleType()) {
        case QOpenGLContext::LibGL:
            str << "LibGL";
            break;
        case QOpenGLContext::LibGLES:
            str << "LibGLES";
            break;
        }
        QWindow window;
        window.setSurfaceType(QSurface::OpenGLSurface);
        window.create();
        context.makeCurrent(&window);
        QOpenGLFunctions functions(&context);

        str << " Vendor: " << reinterpret_cast<const char *>(functions.glGetString(GL_VENDOR))
            << "\nRenderer: " << reinterpret_cast<const char *>(functions.glGetString(GL_RENDERER))
            << "\nVersion: " << reinterpret_cast<const char *>(functions.glGetString(GL_VERSION))
            << "\nShading language: " << reinterpret_cast<const char *>(functions.glGetString(GL_SHADING_LANGUAGE_VERSION))
            <<  "\nFormat: " << context.format();

        if (listExtensions) {
            QList<QByteArray> extensionList = context.extensions().toList();
            std::sort(extensionList.begin(), extensionList.end());
            str << " \nFound " << extensionList.size() << " extensions:\n";
            foreach (const QByteArray &extension, extensionList)
                str << "  " << extension << '\n';
        }
    } else {

void KisOpenGL::initialize()
{
    if (initialized) return;

    setDefaultFormat();

    // we need a QSurface active to get our GL functions from the context
    QWindow  surface;
    surface.setSurfaceType( QSurface::OpenGLSurface );
    surface.create();

    QOpenGLContext context;
    context.create();
    context.makeCurrent( &surface );

    QOpenGLFunctions  *funcs = context.functions();
    funcs->initializeOpenGLFunctions();

    qDebug() << "OpenGL Info";
    qDebug() << "  Vendor: " << reinterpret_cast<const char *>(funcs->glGetString(GL_VENDOR));
    qDebug() << "  Renderer: " << reinterpret_cast<const char *>(funcs->glGetString(GL_RENDERER));
    qDebug() << "  Version: " << reinterpret_cast<const char *>(funcs->glGetString(GL_VERSION));
    qDebug() << "  Shading language: " << reinterpret_cast<const char *>(funcs->glGetString(GL_SHADING_LANGUAGE_VERSION));
    qDebug() << "  Requested format: " << QSurfaceFormat::defaultFormat();
    qDebug() << "  Current format:   " << context.format();

    glMajorVersion = context.format().majorVersion();
    glMinorVersion = context.format().minorVersion();
    supportsDeprecatedFunctions = (context.format().options() & QSurfaceFormat::DeprecatedFunctions);

    initialized = true;
}

void tst_QOpenGL::fboHandleNulledAfterContextDestroyed()
{
    QWindow window;
    window.setSurfaceType(QWindow::OpenGLSurface);
    window.setGeometry(0, 0, 10, 10);
    window.create();

    QOpenGLFramebufferObject *fbo = 0;

    {
        QOpenGLContext ctx;
        ctx.create();

        ctx.makeCurrent(&window);

        if (!QOpenGLFramebufferObject::hasOpenGLFramebufferObjects())
            QSKIP("QOpenGLFramebufferObject not supported on this platform");

        fbo = new QOpenGLFramebufferObject(128, 128);

        QVERIFY(fbo->handle() != 0);
    }

    QCOMPARE(fbo->handle(), 0U);
}

QString openGlContext()
{
    QString result;
    QTextStream str(&result);

    QOpenGLContext context;
    if (context.create()) {
#  ifdef QT_OPENGL_DYNAMIC
        str << "Dynamic GL ";
#  endif
        switch (context.openGLModuleType()) {
        case QOpenGLContext::LibGL:
            str << "LibGL";
            break;
        case QOpenGLContext::LibGLES:
            str << "LibGLES";
            break;
        }

        QWindow window;
        if (QGuiApplication::platformName() == QLatin1String("greenisland"))
            window.setFlags(Qt::Desktop);
        window.setSurfaceType(QSurface::OpenGLSurface);
        //window.setScreen(QGuiApplication::primaryScreen());
        window.create();
        if (context.makeCurrent(&window)) {
            QOpenGLFunctions functions(&context);

            str << " Vendor: " << reinterpret_cast<const char *>(functions.glGetString(GL_VENDOR))
                << "\nRenderer: " << reinterpret_cast<const char *>(functions.glGetString(GL_RENDERER))
                << "\nVersion: " << reinterpret_cast<const char *>(functions.glGetString(GL_VERSION))
                << "\nGLSL version: " << reinterpret_cast<const char *>(functions.glGetString(GL_SHADING_LANGUAGE_VERSION))
                << "\nFormat: " << context.format();

            QList<QByteArray> extensionList = context.extensions().toList();
            std::sort(extensionList.begin(), extensionList.end());
            QByteArray extensions = extensionList.join(' ');
            str << " \nFound " << extensionList.size() << " extensions:\n";
            str << wordWrap(extensions, 78);

            context.doneCurrent();
        }
        window.destroy();
    } else {
        str << "Unable to create an Open GL context.\n";
    }

    return result;
}

static QSurface *createSurface(int surfaceClass)
{
    if (surfaceClass == int(QSurface::Window)) {
        QWindow *window = new QWindow;
        window->setSurfaceType(QWindow::OpenGLSurface);
        window->setGeometry(0, 0, 10, 10);
        window->create();
        return window;
    } else if (surfaceClass == int(QSurface::Offscreen)) {
        QOffscreenSurface *offscreenSurface = new QOffscreenSurface;
        offscreenSurface->create();
        return offscreenSurface;
    }
    return 0;
}

void tst_QOpenGL::aboutToBeDestroyed()
{
    QWindow window;
    window.setSurfaceType(QWindow::OpenGLSurface);
    window.setGeometry(0, 0, 128, 128);
    window.create();

    QOpenGLContext *context = new QOpenGLContext;
    QSignalSpy spy(context, SIGNAL(aboutToBeDestroyed()));

    context->create();
    context->makeCurrent(&window);

    QCOMPARE(spy.size(), 0);

    delete context;

    QCOMPARE(spy.size(), 1);
}

/**
 * Request the video to avoid the conflicts
 **/
bool VideoWidget::request( struct vout_window_t *p_wnd )
{
    if( stable )
    {
        msg_Dbg( p_intf, "embedded video already in use" );
        return false;
    }
    assert( !p_window );

    /* The owner of the video window needs a stable handle (WinId). Reparenting
     * in Qt4-X11 changes the WinId of the widget, so we need to create another
     * dummy widget that stays within the reparentable widget. */
    stable = new QWidget();
    QPalette plt = palette();
    plt.setColor( QPalette::Window, Qt::black );
    stable->setPalette( plt );
    stable->setAutoFillBackground(true);
    /* Force the widget to be native so that it gets a winId() */
    stable->setAttribute( Qt::WA_NativeWindow, true );
    /* Indicates that the widget wants to draw directly onto the screen.
       Widgets with this attribute set do not participate in composition
       management */
    /* This is currently disabled on X11 as it does not seem to improve
     * performance, but causes the video widget to be transparent... */
#if !defined (QT5_HAS_X11)
    stable->setAttribute( Qt::WA_PaintOnScreen, true );
#else
    stable->setMouseTracking( true );
    setMouseTracking( true );
#endif
    layout->addWidget( stable );

    sync();
    p_window = p_wnd;

    p_wnd->type = p_intf->p_sys->voutWindowType;
    switch( p_wnd->type )
    {
        case VOUT_WINDOW_TYPE_XID:
            p_wnd->handle.xid = stable->winId();
            p_wnd->display.x11 = NULL;
            break;
        case VOUT_WINDOW_TYPE_HWND:
            p_wnd->handle.hwnd = (void *)stable->winId();
            break;
        case VOUT_WINDOW_TYPE_NSOBJECT:
            p_wnd->handle.nsobject = (void *)stable->winId();
            break;
#ifdef QT5_HAS_WAYLAND
        case VOUT_WINDOW_TYPE_WAYLAND:
        {
            QWindow *window = stable->windowHandle();
            assert(window != NULL);
            window->create();

            QPlatformNativeInterface *qni = qApp->platformNativeInterface();
            assert(qni != NULL);

            p_wnd->handle.wl = static_cast<wl_surface*>(
                qni->nativeResourceForWindow(QByteArrayLiteral("surface"),
                                             window));
            p_wnd->display.wl = static_cast<wl_display*>(
                qni->nativeResourceForIntegration(QByteArrayLiteral("wl_display")));
            break;
        }
#endif
        default:
            vlc_assert_unreachable();
    }
    return true;
}

void tst_QOpenGL::QTBUG15621_triangulatingStrokerDivZero()
{
#if defined(Q_OS_LINUX) && defined(Q_CC_GNU) && !defined(__x86_64__)
    QSKIP("QTBUG-22617");
#endif

    QWindow window;
    window.setSurfaceType(QWindow::OpenGLSurface);
    window.setGeometry(0, 0, 128, 128);
    window.create();

    QOpenGLContext ctx;
    ctx.create();
    ctx.makeCurrent(&window);

    if (!QOpenGLFramebufferObject::hasOpenGLFramebufferObjects())
        QSKIP("QOpenGLFramebufferObject not supported on this platform");

    QOpenGLFramebufferObject fbo(128, 128);
    fbo.bind();

    QOpenGLPaintDevice device(128, 128);

    // QTBUG-15621 is only a problem when qreal is double, but do the test anyway.
    qreal delta = sizeof(qreal) == sizeof(float) ? 1e-4 : 1e-8;
    QVERIFY(128 != 128 + delta);

    QPainterPath path;
    path.moveTo(16 + delta, 16);
    path.moveTo(16, 16);

    path.lineTo(16 + delta, 16); // Short lines to check for division by zero.
    path.lineTo(112 - delta, 16);
    path.lineTo(112, 16);

    path.quadTo(112, 16, 112, 16 + delta);
    path.quadTo(112, 64, 112, 112 - delta);
    path.quadTo(112, 112, 112, 112);

    path.cubicTo(112, 112, 112, 112, 112 - delta, 112);
    path.cubicTo(80, 112, 48, 112, 16 + delta, 112);
    path.cubicTo(16 + delta, 112, 16 + delta, 112, 16, 112);

    path.closeSubpath();

    QPen pen(Qt::red, 28, Qt::SolidLine, Qt::FlatCap, Qt::MiterJoin);

    QPainter p(&device);
    p.fillRect(QRect(0, 0, 128, 128), Qt::blue);
    p.strokePath(path, pen);
    p.end();
    QImage image = fbo.toImage().convertToFormat(QImage::Format_RGB32);

    const QRgb red = 0xffff0000;
    const QRgb blue = 0xff0000ff;

    QCOMPARE(image.pixel(8, 8), red);
    QCOMPARE(image.pixel(119, 8), red);
    QCOMPARE(image.pixel(8, 119), red);
    QCOMPARE(image.pixel(119, 119), red);

    QCOMPARE(image.pixel(0, 0), blue);
    QCOMPARE(image.pixel(127, 0), blue);
    QCOMPARE(image.pixel(0, 127), blue);
    QCOMPARE(image.pixel(127, 127), blue);

    QCOMPARE(image.pixel(32, 32), blue);
    QCOMPARE(image.pixel(95, 32), blue);
    QCOMPARE(image.pixel(32, 95), blue);
    QCOMPARE(image.pixel(95, 95), blue);
}

void QWidgetPrivate::create_sys(WId window, bool initializeWindow, bool destroyOldWindow)
{
    Q_Q(QWidget);

    Q_UNUSED(window);
    Q_UNUSED(initializeWindow);
    Q_UNUSED(destroyOldWindow);

    Qt::WindowFlags flags = data.window_flags;

    if (!q->testAttribute(Qt::WA_NativeWindow) && !q->isWindow())
        return; // we only care about real toplevels

    QWindow *win = topData()->window;
    // topData() ensures the extra is created but does not ensure 'window' is non-null
    // in case the extra was already valid.
    if (!win) {
        createTLSysExtra();
        win = topData()->window;
    }

    win->setFlags(data.window_flags);
    fixPosIncludesFrame();
    if (q->testAttribute(Qt::WA_Moved))
        win->setGeometry(q->geometry());
    else
        win->resize(q->size());
    win->setScreen(QGuiApplication::screens().value(topData()->screenIndex, 0));

    if (q->testAttribute(Qt::WA_TranslucentBackground)) {
        QSurfaceFormat format;
        format.setAlphaBufferSize(8);
        win->setFormat(format);
    }

    if (QWidget *nativeParent = q->nativeParentWidget()) {
        if (nativeParent->windowHandle()) {
            if (flags & Qt::Window) {
                win->setTransientParent(nativeParent->windowHandle());
                win->setParent(0);
            } else {
                win->setTransientParent(0);
                win->setParent(nativeParent->windowHandle());
            }
        }
    }

    qt_window_private(win)->positionPolicy = topData()->posIncludesFrame ?
        QWindowPrivate::WindowFrameInclusive : QWindowPrivate::WindowFrameExclusive;
    win->create();
    // Enable nonclient-area events for QDockWidget and other NonClientArea-mouse event processing.
    if ((flags & Qt::Desktop) == Qt::Window)
        win->handle()->setFrameStrutEventsEnabled(true);

    data.window_flags = win->flags();

    QBackingStore *store = q->backingStore();

    if (!store) {
        if (win && q->windowType() != Qt::Desktop)
            q->setBackingStore(new QBackingStore(win));
        else
            q->setAttribute(Qt::WA_PaintOnScreen, true);
    }

    setWindowModified_helper();
    setWinId(win->winId());

    // Check children and create windows for them if necessary
    q_createNativeChildrenAndSetParent(q);

    if (extra && !extra->mask.isEmpty())
        setMask_sys(extra->mask);

    // If widget is already shown, set window visible, too
    if (q->isVisible())
        win->setVisible(true);
}

//.........这里部分代码省略.........
    pcmd.setCheckersBackground(checkers_background);

    QWidget *activeWidget = 0;

    if (interactive) {
        runInteractive();
        if (!files.isEmpty())
            interactive_widget->load(files.at(0));
    } else if (files.isEmpty()) {
        printHelp();
        return 0;
    } else {
        for (int j=0; j<files.size(); ++j) {
            const QString &fileName = files.at(j);
            QStringList content;

            QFile file(fileName);
            QFileInfo fileinfo(file);
            if (file.open(QIODevice::ReadOnly)) {
                QTextStream textFile(&file);
                QString script = textFile.readAll();
                content = script.split("\n", QString::SkipEmptyParts);
            } else {
                printf("failed to read file: '%s'\n", qPrintable(fileinfo.absoluteFilePath()));
                continue;
            }
            pcmd.setContents(content);

            if (show_cmp) {
                QString pmFile = QString(files.at(j)).replace(".qps", "_qps") + ".png";
                qDebug() << pmFile << QFileInfo(pmFile).exists();
                QPixmap pixmap(pmFile);
                if (!pixmap.isNull()) {
                    QLabel *label = createLabel();
                    label->setWindowTitle("VERIFY: " + pmFile);
                    label->setPixmap(pixmap);
                    label->show();
                }
            }

            switch (type) {

            case WidgetType:
            {
                OnScreenWidget<QWidget> *qWidget =
                    new OnScreenWidget<QWidget>(files.at(j));
                qWidget->setVerboseMode(verboseMode);
                qWidget->setType(type);
                qWidget->setCheckersBackground(checkers_background);
                qWidget->m_commands = content;
                qWidget->resize(width, height);
                qWidget->show();
                activeWidget = qWidget;
                break;
            }

            case ImageWidgetType:
            {
                OnScreenWidget<QWidget> *qWidget = new OnScreenWidget<QWidget>(files.at(j));
                qWidget->setVerboseMode(verboseMode);
                qWidget->setType(type);
                qWidget->setCheckersBackground(checkers_background);
                qWidget->m_commands = content;
                qWidget->resize(width, height);
                qWidget->show();
                activeWidget = qWidget;