refactoring finished

internal/generator/text.go

@@ -33,9 +33,19 @@ func LoadFace(path string, size float64) (font.Face, error) {
 	if err != nil {
 		return nil, fmt.Errorf("text: %w", err)
 	}
+	face, err := NewFace(data, size)
+	if err != nil {
+		return nil, fmt.Errorf("text: load %s: %w", path, err)
+	}
+	return face, nil
+}
+
+// NewFace parses TTF/OTF data and builds a render-ready face at the given
+// pixel size (DPI 72, full hinting for crisp video text).
+func NewFace(data []byte, size float64) (font.Face, error) {
 	f, err := opentype.Parse(data)
 	if err != nil {
-		return nil, fmt.Errorf("text: parse %s: %w", path, err)
+		return nil, fmt.Errorf("parse font: %w", err)
 	}
 	face, err := opentype.NewFace(f, &opentype.FaceOptions{
 		Size:    size,
@@ -43,7 +53,7 @@ func LoadFace(path string, size float64) (font.Face, error) {
 		Hinting: font.HintingFull,
 	})
 	if err != nil {
-		return nil, fmt.Errorf("text: face %s: %w", path, err)
+		return nil, fmt.Errorf("create font face: %w", err)
 	}
 	return face, nil
 }