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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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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.apache.poi.sl.draw;

import java.awt.Font;
import java.awt.Graphics2D;

import org.apache.poi.common.usermodel.fonts.FontInfo;
import org.apache.poi.util.StringUtil;

/**
 * Manages fonts when rendering slides.
 *
 * Use this class to handle unknown / missing fonts or to substitute fonts
 */
public interface DrawFontManager {

    /**
     * select a font to be used to paint text
     *
     * @param graphics the graphics context to request additional rendering hints
     * @param fontInfo the font info object corresponding to the text run font
     *
     * @return the font to be used to paint text
     */
    FontInfo getMappedFont(Graphics2D graphics, FontInfo fontInfo);

    /**
     * In case the original font doesn't contain a glyph, use the
     * returned fallback font as an alternative
     *
     * @param graphics the graphics context to request additional rendering hints
     * @param fontInfo the font info object corresponding to the text run font
     *
     * @return the font to be used as a fallback for the original typeface
     */
    FontInfo getFallbackFont(Graphics2D graphics, FontInfo fontInfo);

    /**
     * Map text charset depending on font family.
     * 
     * Currently this only maps for wingdings and symbol font (into unicode private use area)
     * 
     * Depending if the requested font is installed in the system, tbe mapped string varies:

     * If the font is registered into the graphics environment the characters are mapped to the
     * private use area. If the font is missing (and hence a AWT logical font is used), the
     * characters are mapped to the corresponding unicode characters
     *
     * @param graphics the graphics context to request additional rendering hints
     * @param fontInfo the font info object corresponding to the text run font
     * @param text the raw text
     *
     * @return String with mapped codepoints
     *
     * @see Drawing exotic fonts in a java applet
     * @see StringUtil#mapMsCodepointString(String)
     */
    String mapFontCharset(Graphics2D graphics, FontInfo fontInfo, String text);

    /**
     * Create an AWT font object with the given attributes
     *
     * @param graphics the graphics context to request additional rendering hints
     * @param fontInfo the font info object corresponding to the text run font
     * @param size the font size in points
     * @param bold {@code true} if the font is bold
     * @param italic {@code true} if the font is italic
     *
     * @return the AWT font object
     */
    Font createAWTFont(Graphics2D graphics, FontInfo fontInfo, double size, boolean bold, boolean italic);
}