From 50941d307595a6ac36526ed6dfbb90748fdf2a85 Mon Sep 17 00:00:00 2001
From: Thomas Friedel <tomee6@gmail.com>
Date: Thu, 17 May 2018 15:08:06 +0200
Subject: [PATCH] clear stencil buffer on activate

---
 canvas.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/canvas.go b/canvas.go
index 75aa9a4..38aebc4 100644
--- a/canvas.go
+++ b/canvas.go
@@ -136,6 +136,7 @@ func (cv *Canvas) tf(v vec) vec {
 func (cv *Canvas) Activate() {
 	gli.Viewport(int32(cv.x), int32(cv.y), int32(cv.w), int32(cv.h))
 	cv.applyScissor()
+	gli.Clear(gl_STENCIL_BUFFER_BIT)
 }
 
 var activeCanvas *Canvas