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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.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
/**
* An IM image data object specifies the contents of a raster image and
* its placement on a page, overlay, or page segment. An IM image can be
* either simple or complex. A simple image is composed of one or more Image
* Raster Data (IRD) structured fields that define the raster pattern for the
* entire image. A complex image is divided into regions called image cells.
* Each image cell is composed of one or more IRD structured fields that define
* the raster pattern for the image cell, and one Image Cell Position (ICP)
* structured field that defines the position of the image cell relative to
* the origin of the entire image. Each ICP also specifies the size of the
* image cell and a fill rectangle into which the cell is replicated.
* <p/>
*/
public class IMImageObject extends AbstractNamedAFPObject {
/**
* The image output control
*/
private ImageOutputControl _imageOutputControl = null;
/**
* The image input descriptor
*/
private ImageInputDescriptor _imageInputDescriptor = null;
/**
* The image cell position
*/
private ImageCellPosition _imageCellPosition = null;
/**
* The image rastor data
*/
private ImageRasterData _imageRastorData = 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 IMImageObject(String name) {
super(name);
}
/**
* Sets the ImageOutputControl.
* @param imageOutputControl The imageOutputControl to set
*/
public void setImageOutputControl(ImageOutputControl imageOutputControl) {
_imageOutputControl = imageOutputControl;
}
/**
* Sets the ImageCellPosition.
* @param imageCellPosition The imageCellPosition to set
*/
public void setImageCellPosition(ImageCellPosition imageCellPosition) {
_imageCellPosition = imageCellPosition;
}
/**
* Sets the ImageInputDescriptor.
* @param imageInputDescriptor The imageInputDescriptor to set
*/
public void setImageInputDescriptor(ImageInputDescriptor imageInputDescriptor) {
_imageInputDescriptor = imageInputDescriptor;
}
/**
* Sets the ImageRastorData.
* @param imageRastorData The imageRastorData to set
*/
public void setImageRasterData(ImageRasterData imageRastorData) {
_imageRastorData = imageRastorData;
}
/**
* Accessor method to write the AFP datastream for the IM Image Objetc
* @param os The stream to write to
* @throws java.io.IOException
*/
public void writeDataStream(OutputStream os)
throws IOException {
writeStart(os);
if (_imageOutputControl != null) {
_imageOutputControl.writeDataStream(os);
}
if (_imageInputDescriptor != null) {
_imageInputDescriptor.writeDataStream(os);
}
if (_imageCellPosition != null) {
_imageCellPosition.writeDataStream(os);
}
if (_imageRastorData != null) {
_imageRastorData.writeDataStream(os);
}
writeEnd(os);
}
/**
* Helper method to write the start of the IM Image Object.
* @param os The stream to write to
*/
private 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) 0x7B; // 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 IM Image Object.
* @param os The stream to write to
*/
private 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) 0x7B; // 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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