remove clear from prepare ui frame for cairo, solve flickering in mt

1 files changed, 8 insertions, 1 deletions

diff --git a/Backends/CairoBackend/src/ImageBackend.cs b/Backends/CairoBackend/src/ImageBackend.cs
index a90d275a..97b61e24 100644
--- a/Backends/CairoBackend/src/ImageBackend.cs
+++ b/Backends/CairoBackend/src/ImageBackend.cs
@@ -65,15 +65,22 @@ namespace Crow.CairoBackend
 		{
 			IContext ctx = base.PrepareUIFrame (existingContext, clipping);
 
-			clear (ctx);
+			for (int i = 0; i < clipping.NumRectangles; i++)
+				ctx.Rectangle (clipping.GetRectangle (i));
+			ctx.Clip ();
+
 			ctx.PushGroup ();
 
 			return ctx;
 		}
 		public override void FlushUIFrame(IContext ctx)
 		{
+			//clear (ctx);
 			ctx.PopGroupToSource ();
+			//ctx.Save();
+			//ctx.Operator = Operator.Source;
 			ctx.Paint ();
+			//ctx.Restore();
 
 			surf.Flush ();