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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package org.sejda.sambox.pdmodel.font;

import java.io.IOException;

/**
 * A subsettable
 * 
 * @author Andrea Vacondio
 */
public interface Subsettable
{
    /**
     * Adds the given Unicode point to the subset.
     * 
     * @param codePoint Unicode code point
     */
    void addToSubset(int codePoint);

    /**
     * Replaces this font with a subset containing only the given Unicode characters.
     *
     * @throws IOException if the subset could not be written
     */
    void subset() throws IOException;

    /**
     * @return true if this font will be subset when embedded.
     */
    boolean willBeSubset();
}