Source Code Cross Referenced for DataBlkFloat.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » jj2000 » j2k » image » 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 » jj2000.j2k.image 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: DataBlkFloat.java,v $
003:         * $Revision: 1.1 $
004:         * $Date: 2005/02/11 05:02:12 $
005:         * $State: Exp $
006:         *
007:         * Interface:           DataBlkFloat
008:         *
009:         * Description:         A float implementation of DataBlk
010:         *
011:         *
012:         *
013:         * COPYRIGHT:
014:         *
015:         * This software module was originally developed by Raphaël Grosbois and
016:         * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
017:         * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
018:         * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
019:         * Centre France S.A) in the course of development of the JPEG2000
020:         * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
021:         * software module is an implementation of a part of the JPEG 2000
022:         * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
023:         * Systems AB and Canon Research Centre France S.A (collectively JJ2000
024:         * Partners) agree not to assert against ISO/IEC and users of the JPEG
025:         * 2000 Standard (Users) any of their rights under the copyright, not
026:         * including other intellectual property rights, for this software module
027:         * with respect to the usage by ISO/IEC and Users of this software module
028:         * or modifications thereof for use in hardware or software products
029:         * claiming conformance to the JPEG 2000 Standard. Those intending to use
030:         * this software module in hardware or software products are advised that
031:         * their use may infringe existing patents. The original developers of
032:         * this software module, JJ2000 Partners and ISO/IEC assume no liability
033:         * for use of this software module or modifications thereof. No license
034:         * or right to this software module is granted for non JPEG 2000 Standard
035:         * conforming products. JJ2000 Partners have full right to use this
036:         * software module for his/her own purpose, assign or donate this
037:         * software module to any third party and to inhibit third parties from
038:         * using this software module for non JPEG 2000 Standard conforming
039:         * products. This copyright notice must be included in all copies or
040:         * derivative works of this software module.
041:         *
042:         * Copyright (c) 1999/2000 JJ2000 Partners.
043:         *
044:         *
045:         *
046:         */
047:
048:        package jj2000.j2k.image;
049:
050:        /**
051:         * This is an implementation of the <tt>DataBlk</tt> interface for
052:         * 32 bit floating point data (float).
053:         *
054:         * <P>The methods in this class are declared final, so that they can
055:         * be inlined by inlining compilers.
056:         *
057:         * @see DataBlk
058:         * */
059:        public class DataBlkFloat extends DataBlk {
060:            /** The array where the data is stored */
061:            public float[] data;
062:
063:            /**
064:             * Creates a DataBlkFloat with 0 dimensions and no data array
065:             * (i.e. data is null).
066:             *
067:             *
068:             *
069:             */
070:            public DataBlkFloat() {
071:            }
072:
073:            /**
074:             * Creates a DataBlkFloat with the specified dimensions and
075:             * position. The data array is initialized to an array of size
076:             * w*h.
077:             *
078:             * @param ulx The horizontal coordinate of the upper-left corner
079:             * of the block
080:             *
081:             * @param uly The vertical coordinate of the upper-left corner
082:             * of the block
083:             *
084:             * @param w The width of the block (in pixels)
085:             *
086:             * @param h The height of the block (in pixels)
087:             *
088:             *
089:             * */
090:            public DataBlkFloat(int ulx, int uly, int w, int h) {
091:                this .ulx = ulx;
092:                this .uly = uly;
093:                this .w = w;
094:                this .h = h;
095:                offset = 0;
096:                scanw = w;
097:                data = new float[w * h];
098:            }
099:
100:            /**
101:             * Copy constructor.
102:             * Creates a DataBlkFloat which is the copy of the DataBlkFloat
103:             * given as paramter.
104:             *
105:             * @param DataBlkFloat the object to be copied.
106:             *
107:             *
108:             * */
109:            public DataBlkFloat(DataBlkFloat src) {
110:                this .ulx = src.ulx;
111:                this .uly = src.uly;
112:                this .w = src.w;
113:                this .h = src.h;
114:                this .offset = 0;
115:                this .scanw = this .w;
116:                this .data = new float[this .w * this .h];
117:                for (int i = 0; i < this .h; i++)
118:                    System.arraycopy(src.data, i * src.scanw, this .data, i
119:                            * this .scanw, this .w);
120:            }
121:
122:            /**
123:             * Returns the identifier of this data type, <tt>TYPE_FLOAT</tt>,
124:             * as defined in <tt>DataBlk</tt>.
125:             *
126:             * @return The type of data stored. Always
127:             * <tt>DataBlk.TYPE_FLOAT</tt>
128:             *
129:             * @see DataBlk#TYPE_FLOAT
130:             *
131:             *
132:             * */
133:            public final int getDataType() {
134:                return TYPE_FLOAT;
135:            }
136:
137:            /**
138:             * Returns the array containing the data, or null if there is no
139:             * data array. The returned array is a float array.
140:             *
141:             * @return The array of data (a float[]) or null if there is no
142:             * data.
143:             *
144:             *
145:             *
146:             */
147:            public final Object getData() {
148:                return data;
149:            }
150:
151:            /**
152:             * Returns the array containing the data, or null if there is no
153:             * data array.
154:             *
155:             * @return The array of data or null if there is no data.
156:             *
157:             *
158:             * */
159:            public final float[] getDataFloat() {
160:                return data;
161:            }
162:
163:            /**
164:             * Sets the data array to the specified one. The provided array
165:             * must be a float array, otherwise a ClassCastException is
166:             * thrown. The size of the array is not checked for consistency
167:             * with the block's dimensions.
168:             *
169:             * @param arr The data array to use. Must be a float array.
170:             *
171:             *
172:             * */
173:            public final void setData(Object arr) {
174:                data = (float[]) arr;
175:            }
176:
177:            /**
178:             * Sets the data array to the specified one. The size of the array
179:             * is not checked for consistency with the block's dimensions.
180:             *
181:             * @param arr The data array to use.
182:             *
183:             *
184:             * */
185:            public final void setDataFloat(float[] arr) {
186:                data = arr;
187:            }
188:
189:            /**
190:             * Returns a string of informations about the DataBlkInt.
191:             * */
192:            public String toString() {
193:                String str = super .toString();
194:                if (data != null) {
195:                    str += ",data=" + data.length + " bytes";
196:                }
197:                return str;
198:            }
199:        }
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