From 8ef0f1ac6a215e56b6034929780cd21e670389d3 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Wed, 28 Feb 2018 15:56:51 +0900
Subject: [PATCH] restorable: Avoid unneeded discarding images

---
 internal/restorable/image.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/restorable/image.go b/internal/restorable/image.go
index a9a1f6b95..9c67b2574 100644
--- a/internal/restorable/image.go
+++ b/internal/restorable/image.go
@@ -172,11 +172,11 @@ func (i *Image) ReplacePixels(pixels []byte) {
 
 // DrawImage draws a given image img to the image.
 func (i *Image) DrawImage(img *Image, sx0, sy0, sx1, sy1 int, geom *affine.GeoM, colorm *affine.ColorM, mode opengl.CompositeMode, filter graphics.Filter) {
-	theImages.makeStaleIfDependingOn(i)
 	vs := img.vertices(sx0, sy0, sx1, sy1, geom)
 	if vs == nil {
 		return
 	}
+	theImages.makeStaleIfDependingOn(i)
 	if img.stale || img.volatile || !IsRestoringEnabled() {
 		i.makeStale()
 	} else {