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JPEG2000 support for Java Advanced Imaging Image I/O Tools API core.
This module is licensed under the [JJ2000 license](LICENSE.txt) and
is therefore NOT compatible with the GPL 3 license. It should be
compatible with the LGPL 2.1 license.
/*
* $RCSfile: ResolutionBox.java,v $
*
*
* Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 05:01:37 $
* $State: Exp $
*/
package com.github.jaiimageio.jpeg2000.impl;
import javax.imageio.metadata.IIOInvalidTreeException;
import javax.imageio.metadata.IIOMetadataNode;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/** This class is defined to represent a Resolution Box of JPEG JP2
* file format. A Data Entry URL Box has a length, and a fixed type
* of "resc" (capture resolution) or "resd" (default display resolution).
*
* Its contens includes the resolution numerators, denominator, and the
* exponents for both horizontal and vertical directions.
*/
public class ResolutionBox extends Box {
/** The data elements in this box. */
private short numV;
private short numH;
private short denomV;
private short denomH;
private byte expV;
private byte expH;
/** The cached horizontal/vertical resolutions. */
private float hRes;
private float vRes;
/** Constructs a ResolutionBox from the provided type and
* content data array.
*/
public ResolutionBox(int type, byte[] data) {
super(18, type, data);
}
/** Constructs a ResolutionBox from the provided type and
* horizontal/vertical resolutions.
*/
public ResolutionBox(int type, float hRes, float vRes) {
super(18, type, null);
this.hRes = hRes;
this.vRes = vRes;
denomH = denomV = 1;
expV = 0;
if (vRes >= 32768) {
int temp = (int)vRes;
while (temp >= 32768) {
expV++;
temp /= 10;
}
numV = (short)(temp & 0xFFFF);
} else {
numV = (short)vRes;
}
expH = 0;
if (hRes >= 32768) {
int temp = (int)hRes;
while (temp >= 32768) {
expH++;
temp /= 10;
}
numH = (short)(temp & 0xFFFF);
} else {
numH = (short)hRes;
}
}
/** Constructs a ResolutionBox based on the provided
* org.w3c.dom.Node.
*/
public ResolutionBox(Node node) throws IIOInvalidTreeException {
super(node);
NodeList children = node.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
String name = child.getNodeName();
if ("VerticalResolutionNumerator".equals(name)) {
numV = Box.getShortElementValue(child);
}
if ("VerticalResolutionDenominator".equals(name)) {
denomV = Box.getShortElementValue(child);
}
if ("HorizontalResolutionNumerator".equals(name)) {
numH = Box.getShortElementValue(child);
}
if ("HorizontalResolutionDenominator".equals(name)) {
denomH = Box.getShortElementValue(child);
}
if ("VerticalResolutionExponent".equals(name)) {
expV = Box.getByteElementValue(child);
}
if ("HorizontalResolutionExponent".equals(name)) {
expH = Box.getByteElementValue(child);
}
}
}
/** Return the horizontal resolution. */
public float getHorizontalResolution() {
return hRes;
}
/** Return the vertical resolution. */
public float getVerticalResolution() {
return vRes;
}
/** Parse the data elements from the provided content data array. */
protected void parse(byte[] data) {
numV = (short)(((data[0] & 0xFF) << 8) | (data[1] & 0xFF));
denomV = (short)(((data[2] & 0xFF) << 8) | (data[3] & 0xFF));
numH = (short)(((data[4] & 0xFF) << 8) | (data[5] & 0xFF));
denomH = (short)(((data[6] & 0xFF) << 8) | (data[7] & 0xFF));
expV = data[8];
expH = data[9];
vRes = (float)((numV & 0xFFFF) * Math.pow(10, expV) / (denomV & 0xFFFF));
hRes = (float)((numH & 0xFFFF)* Math.pow(10, expH) / (denomH & 0xFFFF));
}
/** Creates an IIOMetadataNode from this resolution
* box. The format of this node is defined in the XML dtd and xsd
* for the JP2 image file.
*/
public IIOMetadataNode getNativeNode() {
IIOMetadataNode node = new IIOMetadataNode(Box.getName(getType()));
setDefaultAttributes(node);
IIOMetadataNode child = new IIOMetadataNode("VerticalResolutionNumerator");
child.setUserObject(new Short(numV));
child.setNodeValue("" + numV);
node.appendChild(child);
child = new IIOMetadataNode("VerticalResolutionDenominator");
child.setUserObject(new Short(denomV));
child.setNodeValue("" + denomV);
node.appendChild(child);
child = new IIOMetadataNode("HorizontalResolutionNumerator");
child.setUserObject(new Short(numH));
child.setNodeValue("" + numH);
node.appendChild(child);
child = new IIOMetadataNode("HorizontalResolutionDenominator");
child.setUserObject(new Short(denomH));
child.setNodeValue("" + denomH);
node.appendChild(child);
child = new IIOMetadataNode("VerticalResolutionExponent");
child.setUserObject(new Byte(expV));
child.setNodeValue("" + expV);
node.appendChild(child);
child = new IIOMetadataNode("HorizontalResolutionExponent");
child.setUserObject(new Byte(expH));
child.setNodeValue("" + expH);
node.appendChild(child);
return node;
}
protected void compose() {
if (data != null)
return;
data = new byte[10];
data[0] = (byte)(numV >> 8);
data[1] = (byte)(numV & 0xFF);
data[2] = (byte)(denomV >> 8);
data[3] = (byte)(denomV & 0xFF);
data[4] = (byte)(numH >> 8);
data[5] = (byte)(numH & 0xFF);
data[6] = (byte)(denomH >> 8);
data[7] = (byte)(denomH & 0xFF);
data[8] = expV;
data[9] = expH;
}
}