http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * 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: ContainerDataDescriptor.java 829057 2009-10-23 13:33:18Z jeremias $ */

package org.apache.fop.afp.modca;

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

import org.apache.fop.afp.util.BinaryUtils;


Container data descriptor (to maintain compatibility with pre-year 2000 applications)

/**
 * Container data descriptor (to maintain compatibility with pre-year 2000 applications)
 */
public class ContainerDataDescriptor extends AbstractDescriptor {

    
Main constructor

Params:
  • width – the container data width
  • height –  the container data height
  • widthRes – the container width resolution
  • heightRes – the container height resolution
/**
     * Main constructor
     *
     * @param width the container data width
     * @param height  the container data height
     * @param widthRes the container width resolution
     * @param heightRes the container height resolution
     */
    public ContainerDataDescriptor(int width, int height, int widthRes,
            int heightRes) {
        super(width, height, widthRes, heightRes);
    }

    
{@inheritDoc} 
/** {@inheritDoc} */
    public void writeToStream(OutputStream os) throws IOException {
        byte[] data = new byte[21];
        copySF(data, Type.DESCRIPTOR, Category.OBJECT_CONTAINER);

        // SF length
        byte[] len = BinaryUtils.convert(data.length - 1, 2);
        data[1] = len[0];
        data[2] = len[1];

        // XocBase = 10 inches
        data[9] = 0x00;

        // YocBase = 10 inches
        data[10] = 0x00;

        // XocUnits
        byte[] xdpi = BinaryUtils.convert(widthRes * 10, 2);
        data[11] = xdpi[0];
        data[12] = xdpi[1];

        // YocUnits
        byte[] ydpi = BinaryUtils.convert(heightRes * 10, 2);
        data[13] = ydpi[0];
        data[14] = ydpi[1];

        // XocSize
        byte[] xsize = BinaryUtils.convert(width, 3);
        data[15] = xsize[0];
        data[16] = xsize[1];
        data[17] = xsize[2];

        // YocSize
        byte[] ysize = BinaryUtils.convert(height, 3);
        data[18] = ysize[0];
        data[19] = ysize[1];
        data[20] = ysize[2];

        os.write(data);
    }

}