pass assets FS into Load - cleaner?

engine/asset.go

@@ -4,6 +4,7 @@ import (
 	"compress/gzip"
 	"encoding/gob"
 	"image"
+	"io/fs"
 	"log"
 
 	"github.com/hajimehoshi/ebiten/v2"
@@ -69,14 +70,14 @@ func (r *ImageRef) Image() *ebiten.Image {
 // Load loads the image. Load is required before Image returns.
 // Loading the same path multiple times uses a cache to return
 // the same image.
-func (r *ImageRef) Load(g *Game) error {
+func (r *ImageRef) Load(assets fs.FS) error {
 	// Fast path load from cache
 	r.image = imageCache[r.Path]
 	if r.image != nil {
 		return nil
 	}
 	// Slow path
-	f, err := g.AssetFS.Open(r.Path)
+	f, err := assets.Open(r.Path)
 	if err != nil {
 		return err
 	}
@@ -106,8 +107,8 @@ type SceneRef struct {
 }
 
 // Load loads the scene from the file.
-func (r *SceneRef) Load(g *Game) error {
+func (r *SceneRef) Load(assets fs.FS) error {
-	f, err := g.AssetFS.Open(r.Path)
+	f, err := assets.Open(r.Path)
 	if err != nil {
 		return err
 	}

engine/game.go

@@ -15,7 +15,6 @@ func init() {
 // One component must be the designated root component - usually a
 // scene of some kind.
 type Game struct {
-	AssetFS      fs.FS
 	ScreenWidth  int
 	ScreenHeight int
 	Root         DrawUpdater // typically a *Scene or SceneRef though
@@ -90,13 +89,13 @@ func Walk(c interface{}, v func(interface{}) error) error {
 
 // Load calls Load on all Loaders reachable via Scan (using Walk).
 // It stops on the first error.
-func (g *Game) Load() error {
+func (g *Game) Load(assets fs.FS) error {
 	return Walk(g.Root, func(c interface{}) error {
 		l, ok := c.(Loader)
 		if !ok {
 			return nil
 		}
-		return l.Load(g)
+		return l.Load(assets)
 	})
 }
 

engine/interface.go

@@ -2,6 +2,7 @@ package engine
 
 import (
 	"image"
+	"io/fs"
 
 	"github.com/hajimehoshi/ebiten/v2"
 )
@@ -39,7 +40,7 @@ type Identifier interface {
 // Loader components get the chance to load themselves. This happens
 // before preparation.
 type Loader interface {
-	Load(game *Game) error
+	Load(fs.FS) error
 }
 
 // ParallaxScaler components have a scaling factor. This is used for

main.go

@@ -102,7 +102,6 @@ func main() {
 	}
 
 	game := &engine.Game{
-		AssetFS:      assets,
 		ScreenHeight: 240,
 		ScreenWidth:  320,
 		Root: &engine.Scene{
@@ -119,7 +118,7 @@ func main() {
 			},
 		},
 	}
-	if err := game.Load(); err != nil {
+	if err := game.Load(assets); err != nil {
 		log.Fatalf("Loading error: %v", err)
 	}
 	game.Prepare()