From b52a02a17809ce5f36b80c8c902acb19f72d93d4 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 3 Apr 2022 00:21:21 +0900
Subject: [PATCH] internal/ui: bug fix: crash when Image.MarkDisposed is called
 multiple times

Closes #2048
---
 internal/ui/image.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/ui/image.go b/internal/ui/image.go
index a4521fa55..12b3ec1d5 100644
--- a/internal/ui/image.go
+++ b/internal/ui/image.go
@@ -52,6 +52,9 @@ func newScreenFramebufferImage(width, height int) *Image {
 }
 
 func (i *Image) MarkDisposed() {
+	if i.mipmap == nil {
+		return
+	}
 	i.mipmap.MarkDisposed()
 	i.mipmap = nil
 }