001 /* Copyright (C) 2004, 2005 Free Software Foundation 002 003 This file is part of GNU Classpath. 004 005 GNU Classpath is free software; you can redistribute it and/or modify 006 it under the terms of the GNU General Public License as published by 007 the Free Software Foundation; either version 2, or (at your option) 008 any later version. 009 010 GNU Classpath is distributed in the hope that it will be useful, but 011 WITHOUT ANY WARRANTY; without even the implied warranty of 012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 General Public License for more details. 014 015 You should have received a copy of the GNU General Public License 016 along with GNU Classpath; see the file COPYING. If not, write to the 017 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 018 02110-1301 USA. 019 020 Linking this library statically or dynamically with other modules is 021 making a combined work based on this library. Thus, the terms and 022 conditions of the GNU General Public License cover the whole 023 combination. 024 025 As a special exception, the copyright holders of this library give you 026 permission to link this library with independent modules to produce an 027 executable, regardless of the license terms of these independent 028 modules, and to copy and distribute the resulting executable under 029 terms of your choice, provided that you also meet, for each linked 030 independent module, the terms and conditions of the license of that 031 module. An independent module is a module which is not derived from 032 or based on this library. If you modify this library, you may extend 033 this exception to your version of the library, but you are not 034 obligated to do so. If you do not wish to do so, delete this 035 exception statement from your version. */ 036 037 package java.awt.image; 038 039 /* This is one of several classes that are nearly identical. Maybe we 040 should have a central template and generate all these files. This 041 is one of the cases where templates or macros would have been 042 useful to have in Java. 043 044 This file has been created using search-replace. My only fear is 045 that these classes will grow out-of-sync as of a result of changes 046 that are not propagated to the other files. As always, mirroring 047 code is a maintenance nightmare. */ 048 049 /** 050 * A {@link DataBuffer} that uses an array of <code>double</code> primitives 051 * to represent each of its banks. 052 * 053 * @since 1.4 054 * 055 * @author Rolf W. Rasmussen (rolfwr@ii.uib.no) 056 * @author Sascha Brawer (brawer@dandelis.ch) 057 */ 058 public final class DataBufferDouble 059 extends DataBuffer 060 { 061 private double[] data; 062 private double[][] bankData; 063 064 /** 065 * Creates a new data buffer with a single data bank containing the 066 * specified number of <code>double</code> elements. 067 * 068 * @param size the number of elements in the data bank. 069 */ 070 public DataBufferDouble(int size) 071 { 072 super(TYPE_DOUBLE, size, 1, 0); 073 bankData = new double[1][]; 074 data = new double[size]; 075 bankData[0] = data; 076 } 077 078 /** 079 * Creates a new data buffer with the specified number of data banks, 080 * each containing the specified number of <code>double</code> elements. 081 * 082 * @param size the number of elements in the data bank. 083 * @param numBanks the number of data banks. 084 */ 085 public DataBufferDouble(int size, int numBanks) 086 { 087 super(TYPE_DOUBLE, size, numBanks); 088 bankData = new double[numBanks][size]; 089 data = bankData[0]; 090 } 091 092 /** 093 * Creates a new data buffer backed by the specified data bank. 094 * <p> 095 * Note: there is no exception when <code>dataArray</code> is 096 * <code>null</code>, but in that case an exception will be thrown 097 * later if you attempt to access the data buffer. 098 * 099 * @param dataArray the data bank. 100 * @param size the number of elements in the data bank. 101 */ 102 public DataBufferDouble(double[] dataArray, int size) 103 { 104 super(TYPE_DOUBLE, size, 1, 0); 105 bankData = new double[1][]; 106 data = dataArray; 107 bankData[0] = data; 108 } 109 110 /** 111 * Creates a new data buffer backed by the specified data bank, with 112 * the specified offset to the first element. 113 * <p> 114 * Note: there is no exception when <code>dataArray</code> is 115 * <code>null</code>, but in that case an exception will be thrown 116 * later if you attempt to access the data buffer. 117 * 118 * @param dataArray the data bank. 119 * @param size the number of elements in the data bank. 120 * @param offset the offset to the first element in the array. 121 */ 122 public DataBufferDouble(double[] dataArray, int size, int offset) 123 { 124 super(TYPE_DOUBLE, size, 1, offset); 125 bankData = new double[1][]; 126 data = dataArray; 127 bankData[0] = data; 128 } 129 130 /** 131 * Creates a new data buffer backed by the specified data banks. 132 * 133 * @param dataArray the data banks. 134 * @param size the number of elements in the data bank. 135 * 136 * @throws NullPointerException if <code>dataArray</code> is 137 * <code>null</code>. 138 */ 139 public DataBufferDouble(double[][] dataArray, int size) 140 { 141 super(TYPE_DOUBLE, size, dataArray.length); 142 bankData = dataArray; 143 data = bankData[0]; 144 } 145 146 /** 147 * Creates a new data buffer backed by the specified data banks, with 148 * the specified offsets to the first element in each bank. 149 * 150 * @param dataArray the data banks. 151 * @param size the number of elements in the data bank. 152 * @param offsets the offsets to the first element in each data bank. 153 * 154 * @throws NullPointerException if <code>dataArray</code> is 155 * <code>null</code>. 156 */ 157 public DataBufferDouble(double[][] dataArray, int size, int[] offsets) 158 { 159 super(TYPE_DOUBLE, size, dataArray.length, offsets); 160 bankData = dataArray; 161 data = bankData[0]; 162 } 163 164 /** 165 * Returns the first data bank. 166 * 167 * @return The first data bank. 168 */ 169 public double[] getData() 170 { 171 return data; 172 } 173 174 /** 175 * Returns a data bank. 176 * 177 * @param bank the bank index. 178 * @return A data bank. 179 */ 180 public double[] getData(int bank) 181 { 182 return bankData[bank]; 183 } 184 185 /** 186 * Returns the array underlying this <code>DataBuffer</code>. 187 * 188 * @return The data banks. 189 */ 190 public double[][] getBankData() 191 { 192 return bankData; 193 } 194 195 /** 196 * Returns an element from the first data bank. The offset (specified in 197 * the constructor) is added to <code>i</code> before accessing the 198 * underlying data array. 199 * 200 * @param i the element index. 201 * @return The element. 202 */ 203 public int getElem(int i) 204 { 205 return (int) data[i+offset]; 206 } 207 208 /** 209 * Returns an element from a particular data bank. The offset (specified in 210 * the constructor) is added to <code>i</code> before accessing the 211 * underlying data array. 212 * 213 * @param bank the bank index. 214 * @param i the element index. 215 * @return The element. 216 */ 217 public int getElem(int bank, int i) 218 { 219 return (int) bankData[bank][i+offsets[bank]]; 220 } 221 222 /** 223 * Sets an element in the first data bank. The offset (specified in the 224 * constructor) is added to <code>i</code> before updating the underlying 225 * data array. 226 * 227 * @param i the element index. 228 * @param val the new element value. 229 */ 230 public void setElem(int i, int val) 231 { 232 data[i+offset] = val; 233 } 234 235 /** 236 * Sets an element in a particular data bank. The offset (specified in the 237 * constructor) is added to <code>i</code> before updating the underlying 238 * data array. 239 * 240 * @param bank the data bank index. 241 * @param i the element index. 242 * @param val the new element value. 243 */ 244 public void setElem(int bank, int i, int val) 245 { 246 bankData[bank][i+offsets[bank]] = val; 247 } 248 249 public float getElemFloat(int i) 250 { 251 return (float) data[i+offset]; 252 } 253 254 public float getElemFloat(int bank, int i) 255 { 256 return (float) bankData[bank][i+offsets[bank]]; 257 } 258 259 public void setElemFloat(int i, float val) 260 { 261 data[i+offset] = val; 262 } 263 264 public void setElemFloat(int bank, int i, float val) 265 { 266 bankData[bank][i+offsets[bank]] = val; 267 } 268 269 public double getElemDouble(int i) 270 { 271 return data[i + offset]; 272 } 273 274 public double getElemDouble(int bank, int i) 275 { 276 return bankData[bank][i + offsets[bank]]; 277 } 278 279 public void setElemDouble(int i, double val) 280 { 281 data[i + offset] = val; 282 } 283 284 public void setElemDouble(int bank, int i, double val) 285 { 286 bankData[bank][i + offsets[bank]] = val; 287 } 288 }