From 4aa80de34d2fa8a9ecd68c5fea999886d75202c9 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 22 Dec 2019 19:20:31 +0900
Subject: [PATCH] examples/windowsize: Bug fix: screenScale can be 0 on
 browsers

---
 examples/windowsize/main.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/examples/windowsize/main.go b/examples/windowsize/main.go
index 3b1ec74a0..932adcd28 100644
--- a/examples/windowsize/main.go
+++ b/examples/windowsize/main.go
@@ -115,7 +115,12 @@ func (g *game) Update(screen *ebiten.Image) error {
 		screenWidth = g.width
 		screenHeight = g.height
 		ww, _ := ebiten.WindowSize()
-		screenScale = float64(ww) / float64(g.width)
+		if ww > 0 {
+			screenScale = float64(ww) / float64(g.width)
+		} else {
+			// ebiten.WindowSize can return (0, 0) on browsers or mobiles.
+			screenScale = 1
+		}
 	}
 
 	fullscreen := ebiten.IsFullscreen()