glwindow: Fix glimagesink cannot show frame when connect to qmlglsrc

When connect to qmlglsrc, x11 event loop will be replace by qt event loop
which will cause the window cannot receive event from xserver, such as resize

https://bugzilla.gnome.org/show_bug.cgi?id=768160

diff --git a/gst-libs/gst/gl/x11/gstglwindow_x11.c b/gst-libs/gst/gl/x11/gstglwindow_x11.c
index a330825..d08b757 100644 (file)
--- a/gst-libs/gst/gl/x11/gstglwindow_x11.c
+++ b/gst-libs/gst/gl/x11/gstglwindow_x11.c
@@ -391,6 +391,7 @@ draw_cb (gpointer data)
   GstGLWindow *window = GST_GL_WINDOW (window_x11);
 
   if (gst_gl_window_is_running (window)) {
+    guint width, height;
     XWindowAttributes attr;
 
     XGetWindowAttributes (window_x11->device, window_x11->internal_win_id,
@@ -414,13 +415,16 @@ draw_cb (gpointer data)
       }
     }
 
-    if (window_x11->allow_extra_expose_events) {
-      if (window->queue_resize) {
-        guint width, height;
+    gst_gl_window_get_surface_dimensions (window, &width, &height);
+    if (attr.width != width || attr.height != height) {
+      width = attr.width;
+      height = attr.height;
+      gst_gl_window_queue_resize (window);
+    }
 
-        gst_gl_window_get_surface_dimensions (window, &width, &height);
+    if (window_x11->allow_extra_expose_events) {
+      if (window->queue_resize)
         gst_gl_window_resize (window, width, height);
-      }
 
       if (window->draw) {
         GstGLContext *context = gst_gl_window_get_context (window);