C++ (Cpp) xcb_ewmh_get_wm_icon_iterator Examples

Example #1

File: LuminaX11.cpp Project: LeFroid/lumina

// === WindowIcon() ===
QIcon LXCB::WindowIcon(WId win){
  //Fetch the _NET_WM_ICON for the window and return it as a QIcon
  if(DEBUG){ qDebug() << "XCB: WindowIcon()"; }
  QIcon icon;
  if(win==0){ return icon; }
  xcb_get_property_cookie_t cookie = xcb_ewmh_get_wm_icon_unchecked(&EWMH, win);
  xcb_ewmh_get_wm_icon_reply_t reply;
  if(1 == xcb_ewmh_get_wm_icon_reply(&EWMH, cookie, &reply, NULL)){
    xcb_ewmh_wm_icon_iterator_t iter = xcb_ewmh_get_wm_icon_iterator(&reply);
    //Just use the first
    bool done =false;
    while(!done){
      //Now convert the current data into a Qt image
      // - first 2 elements are width and height (removed via XCB functions)
      // - data in rows from left to right and top to bottom
      QImage image(iter.width, iter.height, QImage::Format_ARGB32); //initial setup
	uint* dat = iter.data;
	//dat+=2; //remember the first 2 element offset
	for(int i=0; i<image.byteCount()/4; ++i, ++dat){
	  ((uint*)image.bits())[i] = *dat; 
	}
      icon.addPixmap(QPixmap::fromImage(image)); //layer this pixmap onto the icon
      //Now see if there are any more icons available
      done = (iter.rem<1); //number of icons remaining
      if(!done){ xcb_ewmh_get_wm_icon_next(&iter); } //get the next icon data
    }
    xcb_ewmh_get_wm_icon_reply_wipe(&reply);
  }
  return icon;
}

Example #2

File: x_client_icon.cpp Project: holtrop/x-choyce

void
x_client_icon::update_net_wm_icon(void)
{
  xcb_free_pixmap(m_c(), m_net_wm_icon);
  m_net_wm_icon = XCB_NONE;

  xcb_generic_error_t * error;
  xcb_get_property_cookie_t c =
    xcb_ewmh_get_wm_icon(m_c.ewmh(), m_x_client.window());

  xcb_ewmh_get_wm_icon_reply_t wm_icon;
  std::memset(&wm_icon, 0, sizeof(xcb_ewmh_get_wm_icon_reply_t));
  xcb_ewmh_get_wm_icon_reply(m_c.ewmh(), c, &wm_icon, &error);

  if (error) {
    std::free(error);

  } else if (0 < xcb_ewmh_get_wm_icon_length(&wm_icon)) {

    uint32_t width = 0;
    uint32_t height = 0;
    uint32_t * data = NULL;

    xcb_ewmh_wm_icon_iterator_t iter = xcb_ewmh_get_wm_icon_iterator(&wm_icon);
    for (; iter.rem; xcb_ewmh_get_wm_icon_next(&iter)) {
      if (iter.width > width) {
        width = iter.width;
        height = iter.height;
        data = iter.data;
      }
    }

    m_icon_geometry.first = width;
    m_icon_geometry.second = height;

    m_net_wm_icon = xcb_generate_id(m_c());
    xcb_create_pixmap(
        m_c(), 32, m_net_wm_icon, m_c.root_window(), width, height);

    xcb_image_t * image = xcb_image_create_native(
        m_c(), width, height, XCB_IMAGE_FORMAT_Z_PIXMAP, 32, NULL, 0, NULL);

    image->data = (uint8_t *)data;

    alpha_transform(image->data, width, height);

    xcb_gcontext_t gc = xcb_generate_id(m_c());
    xcb_create_gc(m_c(), gc, m_net_wm_icon, 0, NULL);

    xcb_image_put(m_c(), m_net_wm_icon, gc, image, 0, 0, 0);

    xcb_image_destroy(image);
    xcb_free_gc(m_c(), gc);

    xcb_ewmh_get_wm_icon_reply_wipe(&wm_icon);
  }
}