From 778ad10518a171a6c41ea7d7305f2f669964f389 Mon Sep 17 00:00:00 2001
From: Lubosz Sarnecki <lubosz.sarnecki@collabora.co.uk>
Date: Thu, 18 Jun 2015 06:04:37 +0200
Subject: [PATCH] glimagesink: Upload and draw overlays with
 GstGLOverlayCompositor

Receives the GstOverlayComposition buffer in the glimagesink and draws them.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
---
 ext/gl/gstglimagesink.c | 17 +++++++++++++++++
 ext/gl/gstglimagesink.h |  2 ++
 2 files changed, 19 insertions(+)

diff --git a/ext/gl/gstglimagesink.c b/ext/gl/gstglimagesink.c
index c7dc5ff..6dcae74 100644
--- a/ext/gl/gstglimagesink.c
+++ b/ext/gl/gstglimagesink.c
@@ -549,6 +549,7 @@ gst_glimage_sink_init (GstGLImageSink * glimage_sink)
   glimage_sink->redisplay_texture = 0;
   glimage_sink->handle_events = TRUE;
   glimage_sink->ignore_alpha = TRUE;
+  glimage_sink->overlay_compositor = NULL;
 
   glimage_sink->mview_output_mode = DEFAULT_MULTIVIEW_MODE;
   glimage_sink->mview_output_flags = DEFAULT_MULTIVIEW_FLAGS;
@@ -619,6 +620,8 @@ gst_glimage_sink_finalize (GObject * object)
 
   glimage_sink = GST_GLIMAGE_SINK (object);
 
+  gst_object_unref (glimage_sink->overlay_compositor);
+
   g_mutex_clear (&glimage_sink->drawing_lock);
 
   GST_DEBUG ("finalized");
@@ -908,6 +911,8 @@ gst_glimage_sink_change_state (GstElement * element, GstStateChange transition)
       g_atomic_int_set (&glimage_sink->to_quit, 0);
       break;
     case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+      glimage_sink->overlay_compositor =
+          gst_gl_overlay_compositor_new (glimage_sink->context);
       break;
     default:
       break;
@@ -1273,6 +1278,12 @@ prepare_next_buffer (GstGLImageSink * glimage_sink)
     next_buffer = in_buffer;
     info = &glimage_sink->in_info;
   }
+
+  if (glimage_sink->overlay_compositor)
+    gst_gl_overlay_compositor_upload_overlays (glimage_sink->overlay_compositor,
+        next_buffer, glimage_sink->attr_position, glimage_sink->attr_texture,
+        glimage_sink->window_width, glimage_sink->window_height);
+
   /* in_buffer invalid now */
   if (!gst_video_frame_map (&gl_frame, info, next_buffer,
           GST_MAP_READ | GST_MAP_GL)) {
@@ -1668,6 +1679,8 @@ gst_glimage_sink_cleanup_glthread (GstGLImageSink * gl_sink)
     gl->DeleteBuffers (1, &gl_sink->vbo_indices);
     gl_sink->vbo_indices = 0;
   }
+
+  gst_gl_overlay_compositor_free_overlays (gl_sink->overlay_compositor);
 }
 
 static void
@@ -1835,6 +1848,10 @@ gst_glimage_sink_on_draw (GstGLImageSink * gl_sink)
 
     gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
 
+    if (gl_sink->overlay_compositor)
+      gst_gl_overlay_compositor_draw_overlays (gl_sink->overlay_compositor,
+          gl_sink->redisplay_shader);
+
     gst_gl_context_clear_shader (gl_sink->context);
 
     if (gl->GenVertexArrays)
diff --git a/ext/gl/gstglimagesink.h b/ext/gl/gstglimagesink.h
index a60a8b8..c4ccaae 100644
--- a/ext/gl/gstglimagesink.h
+++ b/ext/gl/gstglimagesink.h
@@ -116,6 +116,8 @@ struct _GstGLImageSink
     GstVideoMultiviewFlags mview_output_flags;
     gboolean output_mode_changed;
     GstGLStereoDownmix mview_downmix_mode;
+
+    GstGLOverlayCompositor *overlay_compositor;
 };
 
 struct _GstGLImageSinkClass
-- 
2.7.4