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/parser/clipper/Point.java

/*
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 2014-2015 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
 *
 *
 * This class is based on the C# open source freeware library Clipper:
 * http://www.angusj.com/delphi/clipper.php
 * The original classes were distributed under the Boost Software License:
 *
 * Freeware for both open source and commercial applications
 * Copyright 2010-2014 Angus Johnson
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
 * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
package com.itextpdf.text.pdf.parser.clipper;

import java.math.BigInteger;
import java.util.Comparator;

public abstract class Point<T extends Number & Comparable<T>> {
    public static class DoublePoint extends Point<Double> {
        public DoublePoint() {
            this( 0, 0 );
        }

        public DoublePoint( double x, double y ) {
            this( x, y, 0 );
        }

        public DoublePoint( double x, double y, double z ) {
            super( x, y, z );
        }

        public DoublePoint( DoublePoint other ) {
            super( other );
        }

        public double getX() {
            return x;
        }

        public double getY() {
            return y;
        }

        public double getZ() {
            return z;
        }
    }

    public static class LongPoint extends Point<Long> {
        public static double getDeltaX( LongPoint pt1, LongPoint pt2 ) {
            if (pt1.getY() == pt2.getY()) {
                return Edge.HORIZONTAL;
            }
            else {
                return (double) (pt2.getX() - pt1.getX()) / (pt2.getY() - pt1.getY());
            }
        }

        public LongPoint() {
            this( 0, 0 );
        }

        public LongPoint( long x, long y ) {
            this( x, y, 0 );
        }

        public LongPoint(double x, double y) {
            this((long) x, (long) y);
        }

        public LongPoint( long x, long y, long z ) {
            super( x, y, z );
        }

        public LongPoint( LongPoint other ) {
            super( other );
        }

        public long getX() {
            return x;
        }

        public long getY() {
            return y;
        }

        public long getZ() {
            return z;
        }
    }

    private static class NumberComparator<T extends Number & Comparable<T>> implements Comparator<T> {

        public int compare( T a, T b ) throws ClassCastException {
            return a.compareTo( b );
        }
    }

    static boolean arePointsClose( Point<? extends Number> pt1, Point<? extends Number> pt2, double distSqrd ) {
        final double dx = pt1.x.doubleValue() - pt2.x.doubleValue();
        final double dy = pt1.y.doubleValue() - pt2.y.doubleValue();
        return dx * dx + dy * dy <= distSqrd;
    }

    static double distanceFromLineSqrd( Point<? extends Number> pt, Point<? extends Number> ln1, Point<? extends Number> ln2 ) {
        //The equation of a line in general form (Ax + By + C = 0)
        //given 2 points (x�,y�) & (x�,y�) is ...
        //(y� - y�)x + (x� - x�)y + (y� - y�)x� - (x� - x�)y� = 0
        //A = (y� - y�); B = (x� - x�); C = (y� - y�)x� - (x� - x�)y�
        //perpendicular distance of point (x�,y�) = (Ax� + By� + C)/Sqrt(A� + B�)
        //see http://en.wikipedia.org/wiki/Perpendicular_distance
        final double A = ln1.y.doubleValue() - ln2.y.doubleValue();
        final double B = ln2.x.doubleValue() - ln1.x.doubleValue();
        double C = A * ln1.x.doubleValue() + B * ln1.y.doubleValue();
        C = A * pt.x.doubleValue() + B * pt.y.doubleValue() - C;
        return C * C / (A * A + B * B);
    }

    static DoublePoint getUnitNormal( LongPoint pt1, LongPoint pt2 ) {
        double dx = pt2.x - pt1.x;
        double dy = pt2.y - pt1.y;
        if (dx == 0 && dy == 0) {
            return new DoublePoint();
        }

        final double f = 1 * 1.0 / Math.sqrt( dx * dx + dy * dy );
        dx *= f;
        dy *= f;

        return new DoublePoint( dy, -dx );
    }

    protected static boolean isPt2BetweenPt1AndPt3( LongPoint pt1, LongPoint pt2, LongPoint pt3 ) {
        if (pt1.equals( pt3 ) || pt1.equals( pt2 ) || pt3.equals( pt2 )) {
            return false;
        }
        else if (pt1.x != pt3.x) {
            return pt2.x > pt1.x == pt2.x < pt3.x;
        }
        else {
            return pt2.y > pt1.y == pt2.y < pt3.y;
        }
    }

    protected static boolean slopesEqual( LongPoint pt1, LongPoint pt2, LongPoint pt3, boolean useFullRange ) {
        if (useFullRange) {
            return BigInteger.valueOf(pt1.getY() - pt2.getY()).multiply(BigInteger.valueOf(pt2.getX() - pt3.getX())).equals(
                   BigInteger.valueOf(pt1.getX() - pt2.getX()).multiply(BigInteger.valueOf(pt2.getY() - pt3.getY())));
        } else {
            return (pt1.getY() - pt2.getY()) * (pt2.getX() - pt3.getX()) - (pt1.getX() - pt2.getX()) * (pt2.getY() - pt3.getY()) == 0;
        }
    }

    protected static boolean slopesEqual( LongPoint pt1, LongPoint pt2, LongPoint pt3, LongPoint pt4, boolean useFullRange ) {
        if (useFullRange) {
            return BigInteger.valueOf(pt1.getY() - pt2.getY()).multiply(BigInteger.valueOf(pt3.getX() - pt4.getX())).equals(
                   BigInteger.valueOf(pt1.getX() - pt2.getX()).multiply(BigInteger.valueOf(pt3.getY() - pt4.getY())));
        } else {
            return (pt1.getY() - pt2.getY()) * (pt3.getX() - pt4.getX()) - (pt1.getX() - pt2.getX()) * (pt3.getY() - pt4.getY()) == 0;
        }
    }

    static boolean slopesNearCollinear( LongPoint pt1, LongPoint pt2, LongPoint pt3, double distSqrd ) {
        //this function is more accurate when the point that's GEOMETRICALLY
        //between the other 2 points is the one that's tested for distance.
        //nb: with 'spikes', either pt1 or pt3 is geometrically between the other pts
        if (Math.abs( pt1.x - pt2.x ) > Math.abs( pt1.y - pt2.y )) {
            if (pt1.x > pt2.x == pt1.x < pt3.x) {
                return distanceFromLineSqrd( pt1, pt2, pt3 ) < distSqrd;
            }
            else if (pt2.x > pt1.x == pt2.x < pt3.x) {
                return distanceFromLineSqrd( pt2, pt1, pt3 ) < distSqrd;
            }
            else {
                return distanceFromLineSqrd( pt3, pt1, pt2 ) < distSqrd;
            }
        }
        else {
            if (pt1.y > pt2.y == pt1.y < pt3.y) {
                return distanceFromLineSqrd( pt1, pt2, pt3 ) < distSqrd;
            }
            else if (pt2.y > pt1.y == pt2.y < pt3.y) {
                return distanceFromLineSqrd( pt2, pt1, pt3 ) < distSqrd;
            }
            else {
                return distanceFromLineSqrd( pt3, pt1, pt2 ) < distSqrd;
            }
        }
    }

    private final static NumberComparator NUMBER_COMPARATOR = new NumberComparator();

    protected T x;

    protected T y;

    protected T z;

    protected Point( Point<T> pt ) {
        this( pt.x, pt.y, pt.z );
    }

    protected Point( T x, T y, T z ) {
        this.x = x;
        this.y = y;
        this.z = z;
    }

    @Override
    public boolean equals( Object obj ) {
        if (obj == null) {
            return false;
        }
        if (obj instanceof Point<?>) {
            final Point<?> a = (Point<?>) obj;
            return NUMBER_COMPARATOR.compare( x, a.x ) == 0 && NUMBER_COMPARATOR.compare( y, a.y ) == 0;
        }
        else {
            return false;
        }
    }

    public void set( Point<T> other ) {
        x = other.x;
        y = other.y;
        z = other.z;
    }

    public void setX( T x ) {
        this.x = x;
    }

    public void setY( T y ) {
        this.y = y;
    }

    public void setZ( T z ) {
        this.z = z;
    }

    @Override
    public String toString() {
        return "Point [x=" + x + ", y=" + y + ", z=" + z + "]";
    }

}// end struct IntPoint

⏎ com/itextpdf/text/pdf/parser/clipper/Point.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

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