gtk: check NULL before unref

aa75b606 · huangqinjin · GitHub · 32485188 · aa75b606
Commit aa75b606 authored Jun 29, 2017 by huangqinjin Committed by GitHub Jun 29, 2017
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Showing with 4 additions and 2 deletions

window_gtk.cpp modules/highgui/src/window_gtk.cpp +4 -2

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--- a/modules/highgui/src/window_gtk.cpp
+++ b/modules/highgui/src/window_gtk.cpp
@@ -951,7 +951,8 @@ static gboolean cvImageWidget_draw(GtkWidget* widget, cairo_t *cr, gpointer data
  }
  cairo_paint(cr);
-  g_object_unref(pixbuf);
+  if(pixbuf)
+      g_object_unref(pixbuf);
  return TRUE;
 }
@@ -1005,7 +1006,8 @@ static gboolean cvImageWidget_expose(GtkWidget* widget, GdkEventExpose* event, g
  }
  cairo_paint(cr);
-  g_object_unref(pixbuf);
+  if(pixbuf)
+      g_object_unref(pixbuf);
  cairo_destroy(cr);
  return TRUE;
 }