From e9f0d0fb51e8d92b566868f8fa5db10c2eccc22f Mon Sep 17 00:00:00 2001
From: Matthew Waters <matthew@centricular.com>
Date: Thu, 21 May 2015 15:05:33 +1000
Subject: [PATCH] glcontext: require a shader version to initialize.

It's very near pointless to try our GL implementation without shaders.

https://bugzilla.gnome.org/show_bug.cgi?id=749284
---
 gst-libs/gst/gl/gstglcontext.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gst-libs/gst/gl/gstglcontext.c b/gst-libs/gst/gl/gstglcontext.c
index 8a71df15ce..98ed0ed8a2 100644
--- a/gst-libs/gst/gl/gstglcontext.c
+++ b/gst-libs/gst/gl/gstglcontext.c
@@ -1101,7 +1101,8 @@ _create_context_info (GstGLContext * context, GstGLAPI gl_api, gint * gl_major,
 
   gl = context->gl_vtable;
 
-  if (!gl->GetString || !gl->GetString (GL_VERSION)) {
+  if (!gl->GetString || !gl->GetString (GL_VERSION)
+      || !gl->GetString (GL_SHADING_LANGUAGE_VERSION)) {
     g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
         "glGetString not defined or returned invalid value");
     return FALSE;