itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

⏎ com/itextpdf/text/pdf/fonts/otf/OpenTypeFontTableReader.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf.fonts.otf;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import com.itextpdf.text.io.RandomAccessSourceFactory;
import com.itextpdf.text.log.Logger;
import com.itextpdf.text.log.LoggerFactory;
import com.itextpdf.text.pdf.RandomAccessFileOrArray;

/**
 * 
 * @author <a href="mailto:paawak@gmail.com">Palash Ray</a>
 */
public abstract class OpenTypeFontTableReader {

	protected static final Logger LOG = LoggerFactory
			.getLogger(OpenTypeFontTableReader.class);

	protected final RandomAccessFileOrArray rf;
	protected final int tableLocation;
	
	private List<String> supportedLanguages;

	public OpenTypeFontTableReader(RandomAccessFileOrArray rf, int tableLocation)
			throws IOException {
		this.rf = rf;
		this.tableLocation = tableLocation;
	}
	
	public Language getSupportedLanguage() throws FontReadingException { 
		
		Language[] allLangs = Language.values();
		
		for (String supportedLang : supportedLanguages) {
			for (Language lang : allLangs) {
				if (lang.isSupported(supportedLang)) {
					return lang;
				}
			}
		}
		
		throw new FontReadingException("Unsupported languages " + supportedLanguages); 
	}

	/**
	 * This is the starting point of the class. A sub-class must call this
	 * method to start getting call backs to the {@link #readSubTable(int, int)}
	 * method.
	 * @throws FontReadingException 
	 */
	protected final void startReadingTable() throws FontReadingException {
		try {
			TableHeader header = readHeader();
			// read the Script tables
			readScriptListTable(tableLocation + header.scriptListOffset);

			// read Feature table
			readFeatureListTable(tableLocation + header.featureListOffset);

			// read LookUpList table
			readLookupListTable(tableLocation + header.lookupListOffset);
		} catch (IOException e) {
			throw new FontReadingException("Error reading font file", e);
		}
	}

	protected abstract void readSubTable(int lookupType, int subTableLocation)
			throws IOException;

	private void readLookupListTable(int lookupListTableLocation)
			throws IOException {
		rf.seek(lookupListTableLocation);
		int lookupCount = rf.readShort();

		List<Integer> lookupTableOffsets = new ArrayList<Integer>();

		for (int i = 0; i < lookupCount; i++) {
			int lookupTableOffset = rf.readShort();
			lookupTableOffsets.add(lookupTableOffset);
		}
		
		// read LookUp tables
		for (int i = 0; i < lookupCount; i++) {
//			LOG.debug("#############lookupIndex=" + i);
			int lookupTableOffset = lookupTableOffsets.get(i);
			readLookupTable(lookupListTableLocation + lookupTableOffset);
		}
		
	}

	private void readLookupTable(int lookupTableLocation) throws IOException {
		rf.seek(lookupTableLocation);
		int lookupType = rf.readShort();
		// LOG.debug("lookupType=" + lookupType);

		// skip 2 bytes for the field `lookupFlag`
		rf.skipBytes(2);

		int subTableCount = rf.readShort();
		// LOG.debug("subTableCount=" + subTableCount);

		List<Integer> subTableOffsets = new ArrayList<Integer>();

		for (int i = 0; i < subTableCount; i++) {
			int subTableOffset = rf.readShort();
			subTableOffsets.add(subTableOffset);
		}

		for (int subTableOffset : subTableOffsets) {
			// LOG.debug("subTableOffset=" + subTableOffset);
			readSubTable(lookupType, lookupTableLocation + subTableOffset);
		}
	}

	protected final List<Integer> readCoverageFormat(int coverageLocation)
			throws IOException {
		rf.seek(coverageLocation);
		int coverageFormat = rf.readShort();

		List<Integer> glyphIds;

		if (coverageFormat == 1) {
			int glyphCount = rf.readShort();

			glyphIds = new ArrayList<Integer>(glyphCount);

			for (int i = 0; i < glyphCount; i++) {
				int coverageGlyphId = rf.readShort();
				glyphIds.add(coverageGlyphId);
			}

		} else if (coverageFormat == 2) {

			int rangeCount = rf.readShort();

			glyphIds = new ArrayList<Integer>();

			for (int i = 0; i < rangeCount; i++) {
				readRangeRecord(glyphIds);
			}

		} else {
			throw new UnsupportedOperationException("Invalid coverage format: "
					+ coverageFormat);
		}

		return Collections.unmodifiableList(glyphIds);
	}

	private void readRangeRecord(List<Integer> glyphIds) throws IOException {
		int startGlyphId = rf.readShort();
		int endGlyphId = rf.readShort();
		int startCoverageIndex = rf.readShort();
		
		for (int glyphId = startGlyphId; glyphId <= endGlyphId; glyphId++) {
			glyphIds.add(glyphId);
		}
		
//		LOG.debug("^^^^^^^^^Coverage Format 2.... " 
//				+ "startGlyphId=" + startGlyphId
//				+ ", endGlyphId=" + endGlyphId
//				+ ", startCoverageIndex=" + startCoverageIndex 
//				+ "\n, glyphIds" + glyphIds);

	}

	private void readScriptListTable(int scriptListTableLocationOffset)
			throws IOException {
		rf.seek(scriptListTableLocationOffset);
		// Number of ScriptRecords
		int scriptCount = rf.readShort();

		Map<String, Integer> scriptRecords = new HashMap<String, Integer>(
				scriptCount);

		for (int i = 0; i < scriptCount; i++) {
			readScriptRecord(scriptListTableLocationOffset, scriptRecords);
		}
		
		List<String> supportedLanguages = new ArrayList<String>(scriptCount);

		for (String scriptName : scriptRecords.keySet()) {
			readScriptTable(scriptRecords.get(scriptName));
			supportedLanguages.add(scriptName);
		}
		
		this.supportedLanguages = Collections.unmodifiableList(supportedLanguages);
	}

	private void readScriptRecord(final int scriptListTableLocationOffset,
			Map<String, Integer> scriptRecords) throws IOException {
		String scriptTag = rf.readString(4, "utf-8");

		int scriptOffset = rf.readShort();

		scriptRecords.put(scriptTag, scriptListTableLocationOffset
				+ scriptOffset);
	}

	private void readScriptTable(final int scriptTableLocationOffset)
			throws IOException {
		rf.seek(scriptTableLocationOffset);
		int defaultLangSys = rf.readShort();
		int langSysCount = rf.readShort();

		if (langSysCount > 0) {
			Map<String, Integer> langSysRecords = new LinkedHashMap<String, Integer>(
					langSysCount);

			for (int i = 0; i < langSysCount; i++) {
				readLangSysRecord(langSysRecords);
			}

			// read LangSys tables
			for (String langSysTag : langSysRecords.keySet()) {
				readLangSysTable(scriptTableLocationOffset
						+ langSysRecords.get(langSysTag));
			}
		}

		// read default LangSys table
		readLangSysTable(scriptTableLocationOffset + defaultLangSys);
	}

	private void readLangSysRecord(Map<String, Integer> langSysRecords)
			throws IOException {
		String langSysTag = rf.readString(4, "utf-8");
		int langSys = rf.readShort();
		langSysRecords.put(langSysTag, langSys);
	}

	private void readLangSysTable(final int langSysTableLocationOffset)
			throws IOException {
		rf.seek(langSysTableLocationOffset);
		int lookupOrderOffset = rf.readShort();
		LOG.debug("lookupOrderOffset=" + lookupOrderOffset);
		int reqFeatureIndex = rf.readShort();
		LOG.debug("reqFeatureIndex=" + reqFeatureIndex);
		int featureCount = rf.readShort();

		List<Short> featureListIndices = new ArrayList<Short>(featureCount);
		for (int i = 0; i < featureCount; i++) {
			featureListIndices.add(rf.readShort());
		}

		LOG.debug("featureListIndices=" + featureListIndices);

	}

	private void readFeatureListTable(final int featureListTableLocationOffset)
			throws IOException {
		rf.seek(featureListTableLocationOffset);
		int featureCount = rf.readShort();
		LOG.debug("featureCount=" + featureCount);

		Map<String, Short> featureRecords = new LinkedHashMap<String, Short>(
				featureCount);
		for (int i = 0; i < featureCount; i++) {
			featureRecords.put(rf.readString(4, "utf-8"), rf.readShort());
		}

		for (String featureName : featureRecords.keySet()) {
			LOG.debug("*************featureName=" + featureName);
			readFeatureTable(featureListTableLocationOffset
					+ featureRecords.get(featureName));
		}

	}

	private void readFeatureTable(final int featureTableLocationOffset)
			throws IOException {
		rf.seek(featureTableLocationOffset);
		int featureParamsOffset = rf.readShort();
		LOG.debug("featureParamsOffset=" + featureParamsOffset);

		int lookupCount = rf.readShort();
		LOG.debug("lookupCount=" + lookupCount);

		List<Short> lookupListIndices = new ArrayList<Short>(lookupCount);
		for (int i = 0; i < lookupCount; i++) {
			lookupListIndices.add(rf.readShort());
		}

//		LOG.debug("lookupListIndices=" + lookupListIndices);

	}

	private TableHeader readHeader() throws IOException {
		rf.seek(tableLocation);
		// 32 bit signed
		int version = rf.readInt();
		// 16 bit unsigned
		int scriptListOffset = rf.readUnsignedShort();
		int featureListOffset = rf.readUnsignedShort();
		int lookupListOffset = rf.readUnsignedShort();

		// LOG.debug("version=" + version);
		// LOG.debug("scriptListOffset=" + scriptListOffset);
		// LOG.debug("featureListOffset=" + featureListOffset);
		// LOG.debug("lookupListOffset=" + lookupListOffset);

		TableHeader header = new TableHeader(version, scriptListOffset,
				featureListOffset, lookupListOffset);

		return header;
	}

}

⏎ com/itextpdf/text/pdf/fonts/otf/OpenTypeFontTableReader.java

Or download all of them as a single archive file:

File name: itextpdf-5.5.14-fyi.zip
File size: 2163839 bytes
Release date: 2009-10-09
Download 

⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

⇐ iText layout.jar Source Code

⇑ Download and Install iText Java Library

⇑⇑ iText for PDF Generation