From f8c0fff6a77ed7f9fea468fe3fb353a0d62f812f Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Mon, 19 Jan 2015 22:08:51 +0900
Subject: [PATCH] example: Bug fix: the path from runtime.Caller is not useful
 on JavaScript (#99)

---
 ebitenutil/loadimage.go  |  3 +++
 example/internal/font.go | 11 +++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/ebitenutil/loadimage.go b/ebitenutil/loadimage.go
index 6bc8e91e9..4a9408377 100644
--- a/ebitenutil/loadimage.go
+++ b/ebitenutil/loadimage.go
@@ -23,6 +23,9 @@ import (
 )
 
 // NewImageFromFile loads the file path and returns ebiten.Image and image.Image.
+//
+// The current directory for path depends on your environment. This will vary on your desktop or web browser.
+// It'll be safer to embed your resource, e.g., with github.com/jteeuwen/go-bindata instead of using this function.
 func NewImageFromFile(path string, filter ebiten.Filter) (*ebiten.Image, image.Image, error) {
 	file, err := os.Open(path)
 	if err != nil {
diff --git a/example/internal/font.go b/example/internal/font.go
index 3951552d6..61e7f48e4 100644
--- a/example/internal/font.go
+++ b/example/internal/font.go
@@ -42,8 +42,15 @@ func (f *Font) TextWidth(str string) int {
 }
 
 func init() {
-	_, path, _, _ := runtime.Caller(0)
-	arcadeFontPath := filepath.Join(filepath.Dir(path), "..", "images", "arcadefont.png")
+	dir := ""
+	if runtime.GOARCH != "js" {
+		// Get the path of this file (font.go).
+		_, path, _, _ := runtime.Caller(0)
+		path = filepath.Dir(path)
+		dir = filepath.Join(path, "..")
+	}
+	arcadeFontPath := filepath.Join(dir, "images", "arcadefont.png")
+
 	arcadeFontImage, _, err := ebitenutil.NewImageFromFile(arcadeFontPath, ebiten.FilterNearest)
 	if err != nil {
 		panic(err)