From ee3c948fe1643ad41f748cfa5ace7560d9cc1394 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Mon, 11 Mar 2013 00:44:27 +0100
Subject: [PATCH] vo_gl3: call glFlush() after frame drawing is complete

Call glFlush() after a frame has been drawn and we're going to only
wait for the correct time before flipping it.

Helps a little bit with stuttering with pans and "heavy" subtitles
covering the screen.
---
 libvo/vo_gl3.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libvo/vo_gl3.c b/libvo/vo_gl3.c
index 99a1380ca3..9647c85d15 100644
--- a/libvo/vo_gl3.c
+++ b/libvo/vo_gl3.c
@@ -1462,6 +1462,11 @@ static void draw_osd(struct vo *vo, struct osd_state *osd)
         gl->Disable(GL_BLEND);
         gl->BindTexture(GL_TEXTURE_2D, 0);
     }
+
+    // The playloop calls this last before waiting some time until it decides
+    // to call flip_page(). Tell OpenGL to start execution of the GPU commands
+    // while we sleep (this happens asynchronously).
+    gl->Flush();
 }
 
 static void gen_eosd(struct gl_priv *p, mp_eosd_images_t *imgs)
-- 
2.11.4.GIT