From 3faa674e320b57ddf1009d04de9e939e27aa645d Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Thu, 14 Feb 2019 00:54:02 +0900
Subject: [PATCH] restorable: Don't call (*graphicscommand.Image).Pixels twice

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

diff --git a/internal/restorable/image.go b/internal/restorable/image.go
index 91f9937ea..e4914a185 100644
--- a/internal/restorable/image.go
+++ b/internal/restorable/image.go
@@ -416,9 +416,10 @@ func (i *Image) makeStaleIfDependingOn(target *Image) {
 
 // readPixelsFromGPU reads the pixels from GPU and resolves the image's 'stale' state.
 func (i *Image) readPixelsFromGPU() {
+	pix := i.image.Pixels()
 	i.basePixels = &Pixels{
-		pixels: i.image.Pixels(),
-		length: len(i.image.Pixels()),
+		pixels: pix,
+		length: len(pix),
 	}
 	i.drawImageHistory = nil
 	i.stale = false