added implementation in GO lang

internal/assets/manager.go

@@ -0,0 +1,49 @@
+package assets
+
+import (
+	"image"
+	_ "image/jpeg"
+	_ "image/png"
+	"os"
+	"path/filepath"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type Manager struct {
+	images map[string]*ebiten.Image
+	misses map[string]bool
+}
+
+func NewManager() *Manager {
+	return &Manager{
+		images: map[string]*ebiten.Image{},
+		misses: map[string]bool{},
+	}
+}
+
+func (m *Manager) Image(path string) (*ebiten.Image, bool) {
+	path = filepath.Clean(path)
+	if img, ok := m.images[path]; ok {
+		return img, true
+	}
+	if m.misses[path] {
+		return nil, false
+	}
+
+	f, err := os.Open(path)
+	if err != nil {
+		m.misses[path] = true
+		return nil, false
+	}
+	defer f.Close()
+
+	src, _, err := image.Decode(f)
+	if err != nil {
+		m.misses[path] = true
+		return nil, false
+	}
+	img := ebiten.NewImageFromImage(src)
+	m.images[path] = img
+	return img, true
+}