ui/gtk: Draw guest frame at refresh cycle

Draw routine needs to be manually invoked in the next refresh
if there is a scanout blob from the guest. This is to prevent
a situation where there is a scheduled draw event but it won't
happen bacause the window is currently in inactive state
(minimized or tabified). If draw is not done for a long time,
gl_block timeout and/or fence timeout (on the guest) will happen
eventually.

v2: Use gd_gl_area_draw(vc) in gtk-gl-area.c

Suggested-by: Vivek Kasireddy <[email protected]>
Cc: Gerd Hoffmann <[email protected]>
Cc: Marc-André Lureau <[email protected]>
Cc: Daniel P. Berrangé <[email protected]>
Signed-off-by: Dongwon Kim <[email protected]>
Acked-by: Marc-André Lureau <[email protected]>
Message-Id: <[email protected]>

Author: downor

ui/gtk-egl.c

@@ -150,6 +150,7 @@ void gd_egl_refresh(DisplayChangeListener *dcl)
             vc, vc->window ? vc->window : vc->gfx.drawing_area);
 
     if (vc->gfx.guest_fb.dmabuf && vc->gfx.guest_fb.dmabuf->draw_submitted) {
+        gd_egl_draw(vc);
         return;
     }
 

ui/gtk-gl-area.c

@@ -126,6 +126,7 @@ void gd_gl_area_refresh(DisplayChangeListener *dcl)
     gd_update_monitor_refresh_rate(vc, vc->window ? vc->window : vc->gfx.drawing_area);
 
     if (vc->gfx.guest_fb.dmabuf && vc->gfx.guest_fb.dmabuf->draw_submitted) {
+        gd_gl_area_draw(vc);
         return;
     }