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/afp/ptoca/PtocaConstants.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: PtocaConstants.java 1337142 2012-05-11 13:14:17Z mehdi $ */

package org.apache.fop.afp.ptoca;

/**
 * A collection of PTOCA constants.
 */
public interface PtocaConstants {

    /**
     * "Escape" sequence for normal PTOCA command sequences.
     */
    byte[] ESCAPE = new byte[] {0x2B, (byte)0xD3};

    /** Bit to set for chained control sequences */
    byte CHAIN_BIT = 1;

    /** Set Intercharacter Adjustment */
    byte SIA = (byte)0xC2;
    /** Set Variable Space Character Increment */
    byte SVI = (byte)0xC4;
    /** Absolute Move Inline */
    byte AMI = (byte)0xC6;
    /** Relative Move Inline */
    byte RMI = (byte)0xC8;

    /** Absolute Move Baseline */
    byte AMB = (byte)0xD2;

    /** Transparent Data */
    byte TRN = (byte)0xDA;

    /** Draw I-axis Rule */
    byte DIR = (byte)0xE4;
    /** Draw B-axis Rule */
    byte DBR = (byte)0xE6;

    /** Set Extended Text Color */
    byte SEC = (byte)0x80;

    /** Set Coded Font Local */
    byte SCFL = (byte)0xF0;
    /** Set Text Orientation */
    byte STO = (byte)0xF6;

    /** No Operation */
    byte NOP = (byte)0xF8;

    /** Maximum size of transparent data chunks */
    int TRANSPARENT_DATA_MAX_SIZE = 253; // max length = 255 (minus the ControlSequence length)

}

⏎ org/apache/fop/afp/ptoca/PtocaConstants.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)