From 4844c530175d823e0fc8adb802140531a5fe396b Mon Sep 17 00:00:00 2001
From: Julien Isorce <julien.isorce@collabora.co.uk>
Date: Thu, 24 Apr 2014 15:36:47 +0100
Subject: [PATCH] gl: call glClearColor before glClear

---
 ext/gl/gstglimagesink.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ext/gl/gstglimagesink.c b/ext/gl/gstglimagesink.c
index b9f21a5bb3..1bcba1b576 100644
--- a/ext/gl/gstglimagesink.c
+++ b/ext/gl/gstglimagesink.c
@@ -1124,6 +1124,8 @@ gst_glimage_sink_on_draw (const GstGLImageSink * gl_sink)
         0.0f, 1.0f,
         1.0f, 1.0f
       };
+
+      gl->ClearColor (0.0, 0.0, 0.0, 0.0);
       gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
       gl->MatrixMode (GL_PROJECTION);
@@ -1159,6 +1161,7 @@ gst_glimage_sink_on_draw (const GstGLImageSink * gl_sink)
 
       GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
 
+      gl->ClearColor (0.0, 0.0, 0.0, 0.0);
       gl->Clear (GL_COLOR_BUFFER_BIT);
 
       gst_gl_shader_use (gl_sink->redisplay_shader);