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diff --git a/libs/minikin/FontFeatureUtils.h b/libs/minikin/FontFeatureUtils.h
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+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MINIKIN_FONT_FEATURE_UTILS_H
+#define MINIKIN_FONT_FEATURE_UTILS_H
+
+#include <hb.h>
+
+#include "minikin/MinikinPaint.h"
+
+namespace minikin {
+
+/**
+ * Returns the final set of font features based on the features requested by this paint object and
+ * extra defaults or implied font features.
+ *
+ * Features are included from the paint object if they are:
+ *   1) in a supported range
+ *
+ * Default features are added based if they are:
+ *   1) implied due to Paint settings such as letterSpacing
+ *   2) default features that do not conflict with requested features
+ */
+std::vector<hb_feature_t> cleanAndAddDefaultFontFeatures(const MinikinPaint& paint);
+
+}  // namespace minikin
+#endif  // MINIKIN_LAYOUT_UTILS_H