1 files changed, 21 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp
index f97c01f390..77cbdd5fba 100644
--- a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp
+++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qxcbglxintegration.cpp
@@ -224,5 +224,26 @@ bool QXcbGlxIntegration::supportsThreadedOpenGL() const
     return QGLXContext::supportsThreading();
 }
 
+bool QXcbGlxIntegration::supportsSwitchableWidgetComposition() const
+{
+    static bool vendorChecked = false;
+    static bool isSwitchableWidgetCompositionAvailable = true;
+    if (!vendorChecked) {
+        vendorChecked = true;
+        Display *display = glXGetCurrentDisplay();
+#ifdef XCB_USE_XLIB
+        if (!display)
+            display = static_cast<Display *>(m_connection->xlib_display());
+#endif
+        const char *glxvendor = glXGetClientString(display, GLX_VENDOR);
+        if (glxvendor) {
+            if (!strcmp(glxvendor, "Parallels Inc"))
+                isSwitchableWidgetCompositionAvailable = false;
+        }
+    }
+
+    return isSwitchableWidgetCompositionAvailable;
+}
+
 
 QT_END_NAMESPACE