Source Code Cross Referenced for ResolutionBox.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » com » sun » media » imageioimpl » plugins » jpeg2000 » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » com.sun.media.imageioimpl.plugins.jpeg2000 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: ResolutionBox.java,v $
003:         *
004:         * 
005:         * Copyright (c) 2005 Sun Microsystems, Inc. All  Rights Reserved.
006:         * 
007:         * Redistribution and use in source and binary forms, with or without
008:         * modification, are permitted provided that the following conditions
009:         * are met: 
010:         * 
011:         * - Redistribution of source code must retain the above copyright 
012:         *   notice, this  list of conditions and the following disclaimer.
013:         * 
014:         * - Redistribution in binary form must reproduce the above copyright
015:         *   notice, this list of conditions and the following disclaimer in 
016:         *   the documentation and/or other materials provided with the
017:         *   distribution.
018:         * 
019:         * Neither the name of Sun Microsystems, Inc. or the names of 
020:         * contributors may be used to endorse or promote products derived 
021:         * from this software without specific prior written permission.
022:         * 
023:         * This software is provided "AS IS," without a warranty of any 
024:         * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
025:         * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
026:         * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027:         * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL 
028:         * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF 
029:         * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030:         * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR 
031:         * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032:         * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033:         * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034:         * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035:         * POSSIBILITY OF SUCH DAMAGES. 
036:         * 
037:         * You acknowledge that this software is not designed or intended for 
038:         * use in the design, construction, operation or maintenance of any 
039:         * nuclear facility. 
040:         *
041:         * $Revision: 1.1 $
042:         * $Date: 2005/02/11 05:01:37 $
043:         * $State: Exp $
044:         */
045:        package com.sun.media.imageioimpl.plugins.jpeg2000;
046:
047:        import javax.imageio.metadata.IIOInvalidTreeException;
048:        import javax.imageio.metadata.IIOMetadataNode;
049:        import org.w3c.dom.Node;
050:        import org.w3c.dom.NodeList;
051:
052:        /** This class is defined to represent a Resolution Box of JPEG JP2
053:         *  file format.  A Data Entry URL Box has a length, and a fixed type
054:         *  of "resc" (capture resolution) or "resd" (default display resolution).
055:         *
056:         * Its contens includes the resolution numerators, denominator, and the
057:         * exponents for both horizontal and vertical directions.
058:         */
059:        public class ResolutionBox extends Box {
060:            /** The data elements in this box. */
061:            private short numV;
062:            private short numH;
063:            private short denomV;
064:            private short denomH;
065:            private byte expV;
066:            private byte expH;
067:
068:            /** The cached horizontal/vertical resolutions. */
069:            private float hRes;
070:            private float vRes;
071:
072:            /** Constructs a <code>ResolutionBox</code> from the provided type and
073:             *  content data array.
074:             */
075:            public ResolutionBox(int type, byte[] data) {
076:                super (18, type, data);
077:            }
078:
079:            /** Constructs a <code>ResolutionBox</code> from the provided type and
080:             *  horizontal/vertical resolutions.
081:             */
082:            public ResolutionBox(int type, float hRes, float vRes) {
083:                super (18, type, null);
084:                this .hRes = hRes;
085:                this .vRes = vRes;
086:                denomH = denomV = 1;
087:
088:                expV = 0;
089:                if (vRes >= 32768) {
090:                    int temp = (int) vRes;
091:                    while (temp >= 32768) {
092:                        expV++;
093:                        temp /= 10;
094:                    }
095:                    numV = (short) (temp & 0xFFFF);
096:                } else {
097:                    numV = (short) vRes;
098:                }
099:
100:                expH = 0;
101:                if (hRes >= 32768) {
102:                    int temp = (int) hRes;
103:                    while (temp >= 32768) {
104:                        expH++;
105:                        temp /= 10;
106:                    }
107:                    numH = (short) (temp & 0xFFFF);
108:                } else {
109:                    numH = (short) hRes;
110:                }
111:            }
112:
113:            /** Constructs a <code>ResolutionBox</code> based on the provided
114:             *  <code>org.w3c.dom.Node</code>.
115:             */
116:            public ResolutionBox(Node node) throws IIOInvalidTreeException {
117:                super (node);
118:                NodeList children = node.getChildNodes();
119:                for (int i = 0; i < children.getLength(); i++) {
120:                    Node child = children.item(i);
121:                    String name = child.getNodeName();
122:
123:                    if ("VerticalResolutionNumerator".equals(name)) {
124:                        numV = Box.getShortElementValue(child);
125:                    }
126:
127:                    if ("VerticalResolutionDenominator".equals(name)) {
128:                        denomV = Box.getShortElementValue(child);
129:                    }
130:
131:                    if ("HorizontalResolutionNumerator".equals(name)) {
132:                        numH = Box.getShortElementValue(child);
133:                    }
134:
135:                    if ("HorizontalResolutionDenominator".equals(name)) {
136:                        denomH = Box.getShortElementValue(child);
137:                    }
138:
139:                    if ("VerticalResolutionExponent".equals(name)) {
140:                        expV = Box.getByteElementValue(child);
141:                    }
142:
143:                    if ("HorizontalResolutionExponent".equals(name)) {
144:                        expH = Box.getByteElementValue(child);
145:                    }
146:                }
147:            }
148:
149:            /** Return the horizontal resolution. */
150:            public float getHorizontalResolution() {
151:                return hRes;
152:            }
153:
154:            /** Return the vertical resolution. */
155:            public float getVerticalResolution() {
156:                return vRes;
157:            }
158:
159:            /** Parse the data elements from the provided content data array. */
160:            protected void parse(byte[] data) {
161:                numV = (short) (((data[0] & 0xFF) << 8) | (data[1] & 0xFF));
162:                denomV = (short) (((data[2] & 0xFF) << 8) | (data[3] & 0xFF));
163:                numH = (short) (((data[4] & 0xFF) << 8) | (data[5] & 0xFF));
164:                denomH = (short) (((data[6] & 0xFF) << 8) | (data[7] & 0xFF));
165:                expV = data[8];
166:                expH = data[9];
167:                vRes = (float) ((numV & 0xFFFF) * Math.pow(10, expV) / (denomV & 0xFFFF));
168:                hRes = (float) ((numH & 0xFFFF) * Math.pow(10, expH) / (denomH & 0xFFFF));
169:            }
170:
171:            /** Creates an <code>IIOMetadataNode</code> from this resolution
172:             *  box.  The format of this node is defined in the XML dtd and xsd
173:             *  for the JP2 image file.
174:             */
175:            public IIOMetadataNode getNativeNode() {
176:                IIOMetadataNode node = new IIOMetadataNode(Box
177:                        .getName(getType()));
178:                setDefaultAttributes(node);
179:
180:                IIOMetadataNode child = new IIOMetadataNode(
181:                        "VerticalResolutionNumerator");
182:                child.setUserObject(new Short(numV));
183:                child.setNodeValue("" + numV);
184:                node.appendChild(child);
185:
186:                child = new IIOMetadataNode("VerticalResolutionDenominator");
187:                child.setUserObject(new Short(denomV));
188:                child.setNodeValue("" + denomV);
189:                node.appendChild(child);
190:
191:                child = new IIOMetadataNode("HorizontalResolutionNumerator");
192:                child.setUserObject(new Short(numH));
193:                child.setNodeValue("" + numH);
194:                node.appendChild(child);
195:
196:                child = new IIOMetadataNode("HorizontalResolutionDenominator");
197:                child.setUserObject(new Short(denomH));
198:                child.setNodeValue("" + denomH);
199:                node.appendChild(child);
200:
201:                child = new IIOMetadataNode("VerticalResolutionExponent");
202:                child.setUserObject(new Byte(expV));
203:                child.setNodeValue("" + expV);
204:                node.appendChild(child);
205:
206:                child = new IIOMetadataNode("HorizontalResolutionExponent");
207:                child.setUserObject(new Byte(expH));
208:                child.setNodeValue("" + expH);
209:                node.appendChild(child);
210:
211:                return node;
212:            }
213:
214:            protected void compose() {
215:                if (data != null)
216:                    return;
217:                data = new byte[10];
218:                data[0] = (byte) (numV >> 8);
219:                data[1] = (byte) (numV & 0xFF);
220:                data[2] = (byte) (denomV >> 8);
221:                data[3] = (byte) (denomV & 0xFF);
222:
223:                data[4] = (byte) (numH >> 8);
224:                data[5] = (byte) (numH & 0xFF);
225:                data[6] = (byte) (denomH >> 8);
226:                data[7] = (byte) (denomH & 0xFF);
227:
228:                data[8] = expV;
229:                data[9] = expH;
230:            }
231:        }
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