flush cairo backend surface for windows, else nothing is drawn

diff --git a/Backends/CairoBackend/src/ImageBackend.cs b/Backends/CairoBackend/src/ImageBackend.cs
index d8518f316db71b87c389dfebbcf769b63a868eed..67512fd9f3f67b348031de75d247638828dc89d7 100644 (file)
--- a/Backends/CairoBackend/src/ImageBackend.cs
+++ b/Backends/CairoBackend/src/ImageBackend.cs
@@ -78,6 +78,8 @@ namespace Crow.CairoBackend
                        ctx.PopGroupToSource ();
                        ctx.Paint ();
 
+                       surf.Flush ();
+
                        base.FlushUIFrame (ctx);
                }
        }