Prevent QWaylandQuickSurface from holding onto multiple buffers indefinitely.

With a queue of just two buffers BufferAttacher can end up holding
references to both after the renderer is stopped starving the client
application and causing it to block in the glSwapBuffers until the
renderer restarts or the surface is destroyed.  Release the current
buffer to the client when the renderer is stopped so it can continue.

Change-Id: Ica0e13ef78f7e6058e273c26b517a88d07f958c7
Reviewed-by: Giulio Camuffo <giulio.camuffo@jollamobile.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/compositor/compositor_api/qwaylandsurfaceitem.h b/src/compositor/compositor_api/qwaylandsurfaceitem.h
index 91dc6879b..cb51b6bfb 100644
--- a/src/compositor/compositor_api/qwaylandsurfaceitem.h
+++ b/src/compositor/compositor_api/qwaylandsurfaceitem.h
@@ -125,7 +125,9 @@ protected:
 
 private:
     friend class QWaylandSurfaceNode;
+    friend class QWaylandQuickSurface;
     void init(QWaylandQuickSurface *);
+    void updateTexture(bool changed);
 
     static QMutex *mutex;