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: ImageRasterData.java 1297404 2012-03-06 10:17:54Z vhennebert $ */

package org.apache.fop.afp.ioca;

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

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


Contains the image points that define the IM image raster pattern.
A raster pattern is the array of presentation device pels that forms
the image. The image data is uncompressed. Bits are grouped into
bytes and are ordered from left to right within each byte. Each bit
in the image data represents an image point and is mapped to
presentation device pels as specified in the IOC structured field.
A bit with value B'1' indicates a significant image point; a bit
with value B'0' indicates an insignificant image point.
Image points are recorded from left to right in rows that represents
scan lines (X direction), and rows representing scan lines are
recorded from top to bottom (Y direction). When the image is
presented, all image points in a row are presented before any
image points in the next sequential row are presented, and all rows
have the same number of image points. If the total number of image
points is not a multiple of 8, the last byte of the image data is
padded to a byte boundary. The padding bits do not represent image
points and are ignored by presentation devices.

/**
 * Contains the image points that define the IM image raster pattern.
 *
 * A raster pattern is the array of presentation device pels that forms
 * the image. The image data is uncompressed. Bits are grouped into
 * bytes and are ordered from left to right within each byte. Each bit
 * in the image data represents an image point and is mapped to
 * presentation device pels as specified in the IOC structured field.
 * A bit with value B'1' indicates a significant image point; a bit
 * with value B'0' indicates an insignificant image point.
 * Image points are recorded from left to right in rows that represents
 * scan lines (X direction), and rows representing scan lines are
 * recorded from top to bottom (Y direction). When the image is
 * presented, all image points in a row are presented before any
 * image points in the next sequential row are presented, and all rows
 * have the same number of image points. If the total number of image
 * points is not a multiple of 8, the last byte of the image data is
 * padded to a byte boundary. The padding bits do not represent image
 * points and are ignored by presentation devices.
 */
public class ImageRasterData extends AbstractAFPObject {

    
the image raster data 
/** the image raster data */
    private final byte[] rasterData;

    
Constructor for the image raster data object

Params:
  • data – The raster image data
/**
     * Constructor for the image raster data object
     *
     * @param data The raster image data
     */
    public ImageRasterData(byte[] data) {
        this.rasterData = data;
    }

    
{@inheritDoc} 
/** {@inheritDoc} */
    public void writeToStream(OutputStream os) throws IOException {
        byte[] data = new byte[9];
        copySF(data, Type.DATA, Category.IM_IMAGE);
        // The size of the structured field
        byte[] len = BinaryUtils.convert(rasterData.length + 8, 2);
        data[1] = len[0];
        data[2] = len[1];
        os.write(data);

        os.write(rasterData);
    }
}