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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