Exemple #1
0
QNativeImage::QNativeImage(int width, int height, QImage::Format format,bool /* isTextBuffer */, QWidget *widget)
    : xshmimg(0), xshmpm(0)
{
    if (!X11->use_mitshm) {
        image = QImage(width, height, format);
        // follow good coding practice and set xshminfo attributes, though values not used in this case
        xshminfo.readOnly = true;
        xshminfo.shmaddr = 0;
        xshminfo.shmid = 0;
        xshminfo.shmseg = 0;
        return;
    }

    QX11Info info = widget->x11Info();

    int dd = info.depth();
    Visual *vis = (Visual*) info.visual();

    xshmimg = XShmCreateImage(X11->display, vis, dd, ZPixmap, 0, &xshminfo, width, height);
    if (!xshmimg) {
        qWarning("QNativeImage: Unable to create shared XImage.");
        return;
    }

    bool ok;
    xshminfo.shmid = shmget(IPC_PRIVATE, xshmimg->bytes_per_line * xshmimg->height,
                            IPC_CREAT | 0777);
    ok = xshminfo.shmid != -1;
    if (ok) {
        xshmimg->data = (char*)shmat(xshminfo.shmid, 0, 0);
        xshminfo.shmaddr = xshmimg->data;
        ok = (xshminfo.shmaddr != (char*)-1);
        if (ok)
            image = QImage((uchar *)xshmimg->data, width, height, systemFormat());
    }
    xshminfo.readOnly = false;
    if (ok)
        ok = XShmAttach(X11->display, &xshminfo);
    if (!ok) {
        qWarning() << "QNativeImage: Unable to attach to shared memory segment.";
        if (xshmimg->data) {
            free(xshmimg->data);
            xshmimg->data = 0;
        }
        XDestroyImage(xshmimg);
        xshmimg = 0;
        if (xshminfo.shmaddr)
            shmdt(xshminfo.shmaddr);
        if (xshminfo.shmid != -1)
            shmctl(xshminfo.shmid, IPC_RMID, 0);
        return;
    }
    xshmpm = XShmCreatePixmap(X11->display, DefaultRootWindow(X11->display), xshmimg->data,
                              &xshminfo, width, height, dd);
    if (!xshmpm) {
        qWarning() << "QNativeImage: Unable to create shared Pixmap.";
    }
}
Exemple #2
0
Ogre::NameValuePairList OgreWidget::getWinParams()
{
	Ogre::NameValuePairList params;

#if defined(Q_OS_MAC) || defined(Q_OS_WIN)
	params["externalWindowHandle"] = Ogre::StringConverter::toString((size_t)(this->winId()));
#else
#if QT_VERSION < 0x050000
	const QX11Info info = this->x11Info();
	Ogre::String winHandle;
	winHandle = Ogre::StringConverter::toString((unsigned long)(info.display()));
	winHandle += ":";
	winHandle += Ogre::StringConverter::toString((unsigned int)(info.screen()));
	winHandle += ":";
	winHandle += Ogre::StringConverter::toString((unsigned long)(this->winId()));
	winHandle += ":";
	winHandle += Ogre::StringConverter::toString((unsigned long)(info.visual()));

	params["externalWindowHandle"] = winHandle;

#elif QT_VERSION >= 0x050100 && defined(Q_WS_X11)
	const QX11Info info = this->x11Info();
	Ogre::String winHandle;
	winHandle = Ogre::StringConverter::toString((unsigned long)(info.display()));
	winHandle += ":";
	winHandle += Ogre::StringConverter::toString((unsigned int)(info.appScreen()));
	winHandle += ":";
	winHandle += Ogre::StringConverter::toString((unsigned long)(this->winId()));

	params["externalWindowHandle"] = winHandle;
#else // only for the time between Qt 5.0 and Qt 5.1 when QX11Info was not included
	params["externalWindowHandle"] = Ogre::StringConverter::toString((unsigned long)(this->winId()));
#endif
#endif

#if defined(Q_OS_MAC)
	params["macAPI"] = "cocoa";
	params["macAPICocoaUseNSView"] = "true";
#endif

	return params;
}
void CarioQImageMainWindow::on_create_image_by_xlib_button_clicked()
{
    int height = ui->label->height();
    int width = ui->label->width();

    QPixmap *pixmap = new QPixmap(width, height);

    QPainter painter(pixmap);
    QPaintDevice *pd = painter.device();
    if(pd->devType() == QInternal::Pixmap)
    {
        QPixmap *pixmap_inner = (QPixmap*) pd;
        Drawable d = (Drawable) pixmap_inner->handle();
        QX11Info xinfo = pixmap_inner->x11Info();
        int width = pixmap_inner->width();
        int height = pixmap_inner->height();

        cairo_surface_t * pCairoSurface =
                cairo_xlib_surface_create_with_xrender_format
                    (xinfo.display(),
                     d,
                     ScreenOfDisplay(xinfo.display(), xinfo.screen()),
                     XRenderFindVisualFormat (xinfo.display(), (Visual*) xinfo.visual()),
                     width,
                     height);

        cairo_t* pCairoContext = cairo_create(pCairoSurface);
        cairo_surface_destroy(pCairoSurface);
        if(pCairoContext)
        {
            cairo_set_source_rgb (pCairoContext, 0.627, 0, 0);
            cairo_set_font_size (pCairoContext, 24.0);

            cairo_move_to (pCairoContext, 10.0, 34.0);
            cairo_show_text (pCairoContext, "Hello, world\nUsing Image X11 Surface");

            cairo_destroy(pCairoContext);
        }
    }

    ui->label->setPixmap(*pixmap);
}