What Is fop.jar? I got it from the fop-2.7-bin.zip.

fop.jar in fop-2.7-bin.zip is the JAR file for FOP 2.7, which is a print formatter driven by XSL formatting objects (XSL-FO). You can obtain fop.jar from the build folder of the fop-2.7-bin.zip file.

Below is the information about the fop.jar (2.2) file:

JAR File Size and Download Location:

JAR name: fop.jar, fop-2.7.jar
Target JDK version: 1.7
File name: fop.jar
File size: 4442817 bytes
Release date: 20-Jan-2022
Download: Apache FOP Website

Java source code files for fop.jar:

⏎ org/apache/fop/pdf/PDFRectangle.java

/*
 * 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.
 */

/* $Id: PDFRectangle.java 1228243 2012-01-06 16:03:44Z cbowditch $ */

package org.apache.fop.pdf;

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

/**
 * class representing a rectangle
 *
 * Rectangles are specified on page 183 of the PDF 1.3 spec.
 */
public class PDFRectangle implements PDFWritable {

    /**
     * lower left x coordinate
     */
    protected int llx;

    /**
     * lower left y coordinate
     */
    protected int lly;

    /**
     * upper right x coordinate
     */
    protected int urx;

    /**
     * upper right y coordinate
     */
    protected int ury;

    /**
     * create a rectangle giving the four separate values
     *
     * @param llx  lower left x coordinate
     * @param lly  lower left y coordinate
     * @param urx  upper right x coordinate
     * @param ury  upper right y coordinate
     */
    public PDFRectangle(int llx, int lly, int urx, int ury) {
        this.llx = llx;
        this.lly = lly;
        this.urx = urx;
        this.ury = ury;
    }

    /**
     * create a rectangle giving an array of four values
     *
     * @param array values in the order llx, lly, urx, ury
     */
    public PDFRectangle(int[] array) {
        this.llx = array[0];
        this.lly = array[1];
        this.urx = array[2];
        this.ury = array[3];
    }

    private String format() {
        StringBuilder textBuffer = new StringBuilder(32);
        format(textBuffer);
        return textBuffer.toString();
    }

    private void format(StringBuilder textBuffer) {
        textBuffer.append('[').append(llx)
                  .append(' ').append(lly)
                  .append(' ').append(urx)
                  .append(' ').append(ury).append(']');
    }

    /** {@inheritDoc} */
    @Override
    public String toString() {
        return "PDFRectangle" + format();
    }

    /** {@inheritDoc} */
    public void outputInline(OutputStream out, StringBuilder textBuffer) throws IOException {
        format(textBuffer);
    }
}

⏎ org/apache/fop/pdf/PDFRectangle.java

Or download all of them as a single archive file:

File name: fop-2.7-src.zip
File size: 3401312 bytes
Release date: 2022-01-20
Download 

⇒ "fop" Command in fop-2.7-bin.zip

⇐ What Is fop-2.7-bin.zip

⇑ Download and Installing of FOP 2.x

⇑⇑ FAQ for FOP (Formatting Object Processor)