From 8f133c443e6384493fc5d328f052a487aba876a4 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Thu, 21 Feb 2019 23:25:41 +0900
Subject: [PATCH] graphics: Change the definition of isSubImage

---
 image.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/image.go b/image.go
index 378b60ced..408e01e57 100644
--- a/image.go
+++ b/image.go
@@ -154,7 +154,7 @@ func (i *Image) isDisposed() bool {
 }
 
 func (i *Image) isSubImage() bool {
-	return i.bounds != nil
+	return i.original != nil
 }
 
 // Clear resets the pixels of the image into 0.
@@ -605,7 +605,8 @@ func (img *Image) Set(x, y int, clr color.Color) {
 
 func (i *Image) resolvePixelsToSet(draw bool) {
 	if i.isSubImage() {
-		i = i.original
+		i.original.resolvePixelsToSet(draw)
+		return
 	}
 
 	if i.pixelsToSet == nil {