de.intarsys.pdf.font.IdentityCMap Maven / Gradle / Ivy

Go to download
/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.pdf.font;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import de.intarsys.pdf.cos.COSName;

/**
 * The generic 2 byte identity mapping (Identity-H and Identity-V).
 */
public class IdentityCMap extends CMap {

	public static final COSName CN_Identity_H = COSName.constant("Identity-H");

	public static final COSName CN_Identity_V = COSName.constant("Identity-V");

	public static IdentityCMap SINGLETON = new IdentityCMap();

	public static CMap getSingleton(COSName name) {
		if (name.equals(CN_Identity_H)) {
			return IdentityCMap.SINGLETON;
		} else if (name.equals(CN_Identity_V)) {
			return IdentityCMap.SINGLETON;
		} else {
			return null;
		}
	}

	/**
	 * @param object
	 */
	protected IdentityCMap() {
		super(null);
	}

	@Override
	public char[] getChars(int codepoint) {
		int decoded = getDecoded(codepoint);
		if (decoded == -1) {
			return null;
		}
		return new char[] { (char) decoded };
	}

	@Override
	public int getDecoded(int value) {
		return value;
	}

	@Override
	public int getEncoded(int character) {
		return character;
	}

	@Override
	public int getNextDecoded(InputStream is) throws IOException {
		int hb = is.read();
		int lb = is.read();
		if (hb == -1 || lb == -1) {
			return -1;
		}
		return (hb << 8) + lb;
	}

	@Override
	public int getNextEncoded(InputStream is) throws IOException {
		int hb = is.read();
		int lb = is.read();
		if (hb == -1 || lb == -1) {
			return -1;
		}
		return (hb << 8) + lb;
	}

	@Override
	public void putNextDecoded(OutputStream os, int character)
			throws IOException {
		// write cid value high byte first
		os.write((character >> 8) & 0xff);
		os.write(character & 0xff);
	}

	@Override
	public void putNextEncoded(OutputStream os, int codepoint)
			throws IOException {
		// write cid value high byte first
		os.write((codepoint >> 8) & 0xff);
		os.write(codepoint & 0xff);
	}
}