From 93c75a9b61608c6ccad16d8f72c0d4b5b3424243 Mon Sep 17 00:00:00 2001
From: Thomas Friedel <tomee6@gmail.com>
Date: Sun, 24 Feb 2019 11:08:22 +0100
Subject: [PATCH] clear stencil when bounds change

---
 backend/gogl/gogl.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/backend/gogl/gogl.go b/backend/gogl/gogl.go
index 5e98eb6..a3990bd 100644
--- a/backend/gogl/gogl.go
+++ b/backend/gogl/gogl.go
@@ -235,6 +235,7 @@ func (b *GoGLBackend) SetBounds(x, y, w, h int) {
 	b.fw, b.fh = float64(w), float64(h)
 	if b == activeContext {
 		gl.Viewport(0, 0, int32(b.w), int32(b.h))
+		gl.Clear(gl.STENCIL_BUFFER_BIT)
 	}
 }