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/*
* 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.
*/
/* $Id$ */
package org.apache.fop.render.afp.modca;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.fop.render.afp.tools.BinaryUtils;
/**
* An IOCA Image Data Object
*/
public class ImageObject extends AbstractDataObject {
/**
* The image segment
*/
private ImageSegment imageSegment = null;
/**
* Constructor for the image object with the specified name,
* the name must be a fixed length of eight characters.
* @param name The name of the image.
*/
public ImageObject(String name) {
super(name);
}
/**
* Set the dimensions of the image.
* @param xresol the x resolution of the image
* @param yresol the y resolution of the image
* @param width the image width
* @param height the image height
*/
public void setImageParameters(int xresol, int yresol, int width, int height) {
if (objectEnvironmentGroup == null) {
objectEnvironmentGroup = new ObjectEnvironmentGroup();
}
objectEnvironmentGroup.setImageData(xresol, yresol, width, height);
if (imageSegment == null) {
imageSegment = new ImageSegment();
}
imageSegment.setImageSize(xresol, yresol, width, height);
}
/**
* Sets the image encoding.
* @param encoding The image encoding.
*/
public void setImageEncoding(byte encoding) {
if (imageSegment == null) {
imageSegment = new ImageSegment();
}
imageSegment.setImageEncoding(encoding);
}
/**
* Sets the image compression.
* @param compression The image compression.
*/
public void setImageCompression(byte compression) {
if (imageSegment == null) {
imageSegment = new ImageSegment();
}
imageSegment.setImageCompression(compression);
}
/**
* Sets the image IDE size.
* @param size The IDE size.
*/
public void setImageIDESize(byte size) {
if (imageSegment == null) {
imageSegment = new ImageSegment();
}
imageSegment.setImageIDESize(size);
}
/**
* Sets the image IDE color model.
* @param colorModel the IDE color model.
*/
public void setImageIDEColorModel(byte colorModel) {
if (imageSegment == null) {
imageSegment = new ImageSegment();
}
imageSegment.setImageIDEColorModel(colorModel);
}
/**
* Set the data of the image.
* @param data The image data
*/
public void setImageData(byte[] data) {
if (imageSegment == null) {
imageSegment = new ImageSegment();
}
imageSegment.setImageData(data);
}
/**
* Helper method to return the start of the image object.
* @param len the length of this ipd start
* @return byte[] The data stream.
*/
private byte[] getIPDStart(int len) {
byte[] l = BinaryUtils.convert(len + 8, 2);
byte[] data = new byte[] {
0x5A, // Structured field identifier
l[0], // Length byte 1
l[1], // Length byte 2
(byte) 0xD3, // Structured field id byte 1
(byte) 0xEE, // Structured field id byte 2
(byte) 0xFB, // Structured field id byte 3
0x00, // Flags
0x00, // Reserved
0x00, // Reserved
};
return data;
}
/**
* {@inheritDoc}
*/
protected void writeContent(OutputStream os) throws IOException {
super.writeContent(os);
if (imageSegment != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
imageSegment.writeDataStream(baos);
byte[] b = baos.toByteArray();
int off = 0;
while (off < b.length) {
int len = Math.min(30000, b.length - off);
os.write(getIPDStart(len));
os.write(b, off, len);
off += len;
}
}
}
/**
* {@inheritDoc}
*/
protected void writeStart(OutputStream os) throws IOException {
byte[] data = new byte[17];
data[0] = 0x5A; // Structured field identifier
data[1] = 0x00; // Length byte 1
data[2] = 0x10; // Length byte 2
data[3] = (byte) 0xD3; // Structured field id byte 1
data[4] = (byte) 0xA8; // Structured field id byte 2
data[5] = (byte) 0xFB; // Structured field id byte 3
data[6] = 0x00; // Flags
data[7] = 0x00; // Reserved
data[8] = 0x00; // Reserved
for (int i = 0; i < nameBytes.length; i++) {
data[9 + i] = nameBytes[i];
}
os.write(data);
}
/**
* Helper method to write the end of the Image Object.
* @param os The stream to write to
* @throws IOException in the event
*/
protected void writeEnd(OutputStream os) throws IOException {
byte[] data = new byte[17];
data[0] = 0x5A; // Structured field identifier
data[1] = 0x00; // Length byte 1
data[2] = 0x10; // Length byte 2
data[3] = (byte) 0xD3; // Structured field id byte 1
data[4] = (byte) 0xA9; // Structured field id byte 2
data[5] = (byte) 0xFB; // Structured field id byte 3
data[6] = 0x00; // Flags
data[7] = 0x00; // Reserved
data[8] = 0x00; // Reserved
for (int i = 0; i < nameBytes.length; i++) {
data[9 + i] = nameBytes[i];
}
os.write(data);
}
}
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