From 18c59e44aa1464c710778b929d001802c6f1900f Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Fri, 29 May 2020 03:47:06 +0900
Subject: [PATCH] shareable: Allow multiple call of (*Shader).Dispose

---
 internal/shareable/shader.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/internal/shareable/shader.go b/internal/shareable/shader.go
index 4c4025994..6f13ae348 100644
--- a/internal/shareable/shader.go
+++ b/internal/shareable/shader.go
@@ -47,6 +47,10 @@ func (s *Shader) MarkDisposed() {
 }
 
 func (s *Shader) dispose() {
+	runtime.SetFinalizer(s, nil)
+	if s.shader == nil {
+		return
+	}
 	s.shader.Dispose()
 	s.shader = nil
 }