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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.afp.ioca;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.fop.afp.Factory;
import org.apache.fop.afp.modca.AbstractNamedAFPObject;
/**
* An Image Segment is represented by a set of self-defining fields, fields
* that describe their own contents. It starts with a Begin Segment, and
* ends with an End Segment.
*
* Between the Begin Segment and End Segment is the image information to
* be processed, called the Image Content.
*
* Only one Image Content can exist within a single IOCA Image Segment.
*/
public class ImageSegment extends AbstractNamedAFPObject {
/**
* The ImageContent for the image segment
*/
private ImageContent imageContent = null;
private final Factory factory;
/**
* Constructor for the image segment with the specified name,
* the name must be a fixed length of eight characters.
* @param factory the object factory
*
* @param name the name of the image.
*/
public ImageSegment(Factory factory, String name) {
super(name);
this.factory = factory;
}
private ImageContent getImageContent() {
if (imageContent == null) {
this.imageContent = factory.createImageContent();
}
return imageContent;
}
/**
* Sets the image size parameters resolution, hsize and vsize.
*
* @param hsize The horizontal size of the image.
* @param vsize The vertical size of the image.
* @param hresol The horizontal resolution of the image.
* @param vresol The vertical resolution of the image.
*/
public void setImageSize(int hsize, int vsize, int hresol, int vresol) {
ImageSizeParameter imageSizeParameter
= factory.createImageSizeParameter(hsize, vsize, hresol, vresol);
getImageContent().setImageSizeParameter(imageSizeParameter);
}
/**
* Sets the image encoding.
*
* @param encoding The image encoding.
*/
public void setEncoding(byte encoding) {
getImageContent().setImageEncoding(encoding);
}
/**
* Sets the image compression.
*
* @param compression The image compression.
*/
public void setCompression(byte compression) {
getImageContent().setImageCompression(compression);
}
/**
* Sets the image IDE size.
*
* @param size The IDE size.
*/
public void setIDESize(byte size) {
getImageContent().setImageIDESize(size);
}
/**
* Sets the image IDE color model.
*
* @param colorModel the IDE color model.
*/
public void setIDEColorModel(byte colorModel) {
getImageContent().setImageIDEColorModel(colorModel);
}
/**
* Set either additive or subtractive mode (used for ASFLAG).
* @param subtractive true for subtractive mode, false for additive mode
*/
public void setSubtractive(boolean subtractive) {
getImageContent().setSubtractive(subtractive);
}
/**
* Set the data image data.
*
* @param data the image data
*/
public void setData(byte[] imageData) {
getImageContent().setImageData(imageData);
}
/** {@inheritDoc} */
public void writeContent(OutputStream os) throws IOException {
if (imageContent != null) {
imageContent.writeToStream(os);
}
}
private static final int NAME_LENGTH = 4;
/** {@inheritDoc} */
protected int getNameLength() {
return NAME_LENGTH;
}
/** {@inheritDoc} */
protected void writeStart(OutputStream os) throws IOException {
//Name disabled, it's optional and not referenced by our code
//byte[] nameBytes = getNameBytes();
byte[] data = new byte[] {
0x70, // ID
0x00, // Length
/*
nameBytes[0], // Name byte 1
nameBytes[1], // Name byte 2
nameBytes[2], // Name byte 3
nameBytes[3], // Name byte 4
*/
};
os.write(data);
}
/** {@inheritDoc} */
protected void writeEnd(OutputStream os) throws IOException {
byte[] data = new byte[] {
0x71, // ID
0x00, // Length
};
os.write(data);
}
}
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