diff --git a/firefly/fs.go b/firefly/fs.go
index c892a1c..be7968c 100644
--- a/firefly/fs.go
+++ b/firefly/fs.go
@@ -3,28 +3,30 @@ package firefly
 import "unsafe"
 
 // A file loaded from the filesystem.
-type File struct {
-	Raw []byte
+type File []byte
+
+func (f File) Bytes() []byte {
+	return []byte(f)
 }
 
 // Convert the File to a Font.
 func (f File) Font() Font {
-	return Font{f.Raw}
+	return Font{f}
 }
 
 // Convert the File to an Image.
 func (f File) Image() Image {
-	return Image{f.Raw}
+	return Image{f}
 }
 
 // Check if the file was loaded.
 func (f File) Exists() bool {
-	return len(f.Raw) != 0
+	return len(f) != 0
 }
 
 // Ensure that the loaded file exists.
 func (f File) Must() File {
-	if len(f.Raw) == 0 {
+	if len(f) == 0 {
 		panic("file not found")
 	}
 	return f
@@ -74,15 +76,15 @@ func loadAllocFile(path string) File {
 	pathPtr := unsafe.Pointer(unsafe.StringData(path))
 	fileSize := getFileSize(pathPtr, uint32(len(path)))
 	if fileSize == 0 {
-		return File{nil}
+		return File(nil)
 	}
-	buf := make([]byte, fileSize)
+	buf := make(File, fileSize)
 	bufPtr := unsafe.Pointer(unsafe.SliceData(buf))
 	loadFile(
 		pathPtr, uint32(len(path)),
 		bufPtr, uint32(len(buf)),
 	)
-	return File{buf}
+	return buf
 }
 
 // Load the file into the given buffer.
@@ -94,9 +96,9 @@ func loadFileInto(path string, buf []byte) File {
 		bufPtr, uint32(len(buf)),
 	)
 	if fileSize == 0 {
-		return File{nil}
+		return File(nil)
 	}
-	return File{buf[:fileSize]}
+	return File(buf[:fileSize])
 }
 
 // Write a file into the app data dir.
diff --git a/firefly/graphics_test.go b/firefly/graphics_test.go
index 9d81eca..e199f12 100644
--- a/firefly/graphics_test.go
+++ b/firefly/graphics_test.go
@@ -6,7 +6,7 @@ import (
 	"github.com/firefly-zero/firefly-go/firefly"
 )
 
-var testImage = []byte{
+var testImage = firefly.File{
 	0x22,       // magic number
 	0x04, 0x00, // image width
 	0x01, // transparency
@@ -22,21 +22,21 @@ func TestImage_GetPixel(t *testing.T) {
 	P := firefly.P
 	tests := []struct {
 		name  string
-		raw   []byte
+		file  firefly.File
 		pixel firefly.Point
 		want  firefly.Color
 	}{
-		{name: "negative point", raw: testImage, pixel: P(-1, -1), want: firefly.ColorNone},
-		{name: "point out of bounds", raw: testImage, pixel: P(100, 100), want: firefly.ColorNone},
-		{name: "x0y0", raw: testImage, pixel: P(0, 0), want: firefly.ColorBlack},
-		{name: "x1y1", raw: testImage, pixel: P(1, 1), want: firefly.ColorLightGreen},
-		{name: "x2y3", raw: testImage, pixel: P(2, 3), want: firefly.ColorGray},
+		{name: "negative point", file: testImage, pixel: P(-1, -1), want: firefly.ColorNone},
+		{name: "point out of bounds", file: testImage, pixel: P(100, 100), want: firefly.ColorNone},
+		{name: "x0y0", file: testImage, pixel: P(0, 0), want: firefly.ColorBlack},
+		{name: "x1y1", file: testImage, pixel: P(1, 1), want: firefly.ColorLightGreen},
+		{name: "x2y3", file: testImage, pixel: P(2, 3), want: firefly.ColorGray},
 	}
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			t.Parallel()
-			image := firefly.File{test.raw}.Image()
+			image := test.file.Image()
 			got := image.GetPixel(test.pixel)
 			if got != test.want {
 				t.Errorf("pixel: {%d, %d}, want %s, but got %s", test.pixel.X, test.pixel.Y, test.want, got)
@@ -47,7 +47,7 @@ func TestImage_GetPixel(t *testing.T) {
 
 func TestImagePixels(t *testing.T) {
 	t.Parallel()
-	image := firefly.File{testImage}.Image()
+	image := testImage.Image()
 	got := image.Pixels()
 	want := 16
 	if got != want {
diff --git a/firefly/sudo/sudo.go b/firefly/sudo/sudo.go
index 5733b9f..0842c01 100644
--- a/firefly/sudo/sudo.go
+++ b/firefly/sudo/sudo.go
@@ -74,13 +74,13 @@ func GetFileSize(path string) int {
 func LoadFile(path string) firefly.File {
 	pathPtr := unsafe.Pointer(unsafe.StringData(path))
 	fileSize := getFileSize(pathPtr, uint32(len(path)))
-	raw := make([]byte, fileSize)
+	raw := make(firefly.File, fileSize)
 	rawPtr := unsafe.Pointer(unsafe.SliceData(raw))
 	loadFile(
 		pathPtr, uint32(len(path)),
 		rawPtr, fileSize,
 	)
-	return firefly.File{Raw: raw}
+	return raw
 }
 
 func RemoveFile(path string) {