1 files changed, 25 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/qxcbscreen.cpp b/src/plugins/platforms/xcb/qxcbscreen.cpp
index 7aef0275e3..1b6bf30294 100644
--- a/src/plugins/platforms/xcb/qxcbscreen.cpp
+++ b/src/plugins/platforms/xcb/qxcbscreen.cpp
@@ -122,12 +122,37 @@ QXcbScreen::QXcbScreen(QXcbConnection *connection, xcb_screen_t *screen, int num
                                     32,
                                     1,
                                     &m_clientLeader), connection);
+
+    xcb_depth_iterator_t depth_iterator =
+        xcb_screen_allowed_depths_iterator(screen);
+
+    while (depth_iterator.rem) {
+        xcb_depth_t *depth = depth_iterator.data;
+        xcb_visualtype_iterator_t visualtype_iterator =
+            xcb_depth_visuals_iterator(depth);
+
+        while (visualtype_iterator.rem) {
+            xcb_visualtype_t *visualtype = visualtype_iterator.data;
+            m_visuals.insert(visualtype->visual_id, *visualtype);
+            xcb_visualtype_next(&visualtype_iterator);
+        }
+
+        xcb_depth_next(&depth_iterator);
+    }
 }
 
 QXcbScreen::~QXcbScreen()
 {
 }
 
+const xcb_visualtype_t *QXcbScreen::visualForId(xcb_visualid_t visualid) const
+{
+    QMap<xcb_visualid_t, xcb_visualtype_t>::const_iterator it = m_visuals.find(visualid);
+    if (it == m_visuals.constEnd())
+        return 0;
+    return &*it;
+}
+
 QRect QXcbScreen::geometry() const
 {
     return QRect(0, 0, m_screen->width_in_pixels, m_screen->height_in_pixels);