[RFC PATCH 8/9] ui/gtk: skip drawing if any of ctx/surface/image don't exist

[Dongwon Kim <dongwon.kim@intel.com>]

Rendering of scanout could be skipped if ctx/surface/image don't
exist due to an asynchronous event such as monitors being disconnected.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel P. Berrangé <berrange@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Philippe Mathieu-Daudé <philmd@linaro.org>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
---
 ui/gtk-egl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index aa22ebbd98..8eae2b4b1f 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -106,6 +106,11 @@ void gd_egl_draw(VirtualConsole *vc)
         if (!vc->gfx.ds) {
             return;
         }
+
+        if (!vc->gfx.esurface || !vc->gfx.ectx || !vc->gfx.ds->image) {
+            return;
+        }
+
         eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
                        vc->gfx.esurface, vc->gfx.ectx);
 
-- 
2.34.1