From a1f53b4f46974b70a83d54700178e45efe123e7e Mon Sep 17 00:00:00 2001
From: Matthew Waters <matthew@centricular.com>
Date: Tue, 4 Feb 2020 19:40:45 +1100
Subject: [PATCH] qmlglsink: propagate the context up the the application

Allows the application to be notified of the OpenGL context creation.
---
 ext/qt/gstqtsink.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ext/qt/gstqtsink.cc b/ext/qt/gstqtsink.cc
index 2a4ad7ccc6..b447c2416b 100644
--- a/ext/qt/gstqtsink.cc
+++ b/ext/qt/gstqtsink.cc
@@ -320,6 +320,13 @@ gst_qt_sink_change_state (GstElement * element, GstStateChange transition)
             (NULL));
         return GST_STATE_CHANGE_FAILURE;
       }
+
+      GST_OBJECT_LOCK (qt_sink->display);
+      gst_gl_display_add_context (qt_sink->display, qt_sink->context);
+      GST_OBJECT_UNLOCK (qt_sink->display);
+
+      gst_gl_element_propagate_display_context (GST_ELEMENT (qt_sink), qt_sink->display);
+
       break;
     case GST_STATE_CHANGE_READY_TO_PAUSED:
       break;