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1 /* |
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2 * Portions Copyright 1997-2001 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 /* **************************************************************** |
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27 ****************************************************************** |
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28 ****************************************************************** |
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29 *** COPYRIGHT (c) Eastman Kodak Company, 1997 |
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30 *** As an unpublished work pursuant to Title 17 of the United |
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31 *** States Code. All rights reserved. |
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32 ****************************************************************** |
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33 ****************************************************************** |
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34 ******************************************************************/ |
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35 |
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36 package java.awt.image; |
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37 |
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38 import java.util.Arrays; |
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39 |
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40 /** |
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41 * This class represents pixel data packed such that the N samples which make |
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42 * up a single pixel are stored in a single data array element, and each data |
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43 * data array element holds samples for only one pixel. |
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44 * This class supports |
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45 * {@link DataBuffer#TYPE_BYTE TYPE_BYTE}, |
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46 * {@link DataBuffer#TYPE_USHORT TYPE_USHORT}, |
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47 * {@link DataBuffer#TYPE_INT TYPE_INT} data types. |
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48 * All data array elements reside |
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49 * in the first bank of a DataBuffer. Accessor methods are provided so |
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50 * that the image data can be manipulated directly. Scanline stride is the |
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51 * number of data array elements between a given sample and the corresponding |
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52 * sample in the same column of the next scanline. Bit masks are the masks |
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53 * required to extract the samples representing the bands of the pixel. |
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54 * Bit offsets are the offsets in bits into the data array |
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55 * element of the samples representing the bands of the pixel. |
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56 * <p> |
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57 * The following code illustrates extracting the bits of the sample |
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58 * representing band <code>b</code> for pixel <code>x,y</code> |
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59 * from DataBuffer <code>data</code>: |
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60 * <pre> |
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61 * int sample = data.getElem(y * scanlineStride + x); |
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62 * sample = (sample & bitMasks[b]) >>> bitOffsets[b]; |
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63 * </pre> |
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64 */ |
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65 |
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66 public class SinglePixelPackedSampleModel extends SampleModel |
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67 { |
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68 /** Bit masks for all bands of the image data. */ |
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69 private int bitMasks[]; |
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70 |
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71 /** Bit Offsets for all bands of the image data. */ |
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72 private int bitOffsets[]; |
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73 |
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74 /** Bit sizes for all the bands of the image data. */ |
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75 private int bitSizes[]; |
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76 |
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77 /** Maximum bit size. */ |
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78 private int maxBitSize; |
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79 |
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80 /** Line stride of the region of image data described by this |
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81 * SinglePixelPackedSampleModel. |
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82 */ |
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83 private int scanlineStride; |
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84 |
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85 private static native void initIDs(); |
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86 static { |
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87 ColorModel.loadLibraries(); |
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88 initIDs(); |
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89 } |
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90 |
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91 /** |
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92 * Constructs a SinglePixelPackedSampleModel with bitMasks.length bands. |
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93 * Each sample is stored in a data array element in the position of |
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94 * its corresponding bit mask. Each bit mask must be contiguous and |
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95 * masks must not overlap. |
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96 * @param dataType The data type for storing samples. |
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97 * @param w The width (in pixels) of the region of the |
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98 * image data described. |
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99 * @param h The height (in pixels) of the region of the |
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100 * image data described. |
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101 * @param bitMasks The bit masks for all bands. |
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102 * @throws IllegalArgumentException if <code>dataType</code> is not |
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103 * either <code>DataBuffer.TYPE_BYTE</code>, |
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104 * <code>DataBuffer.TYPE_USHORT</code>, or |
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105 * <code>DataBuffer.TYPE_INT</code> |
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106 */ |
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107 public SinglePixelPackedSampleModel(int dataType, int w, int h, |
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108 int bitMasks[]) { |
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109 this(dataType, w, h, w, bitMasks); |
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110 if (dataType != DataBuffer.TYPE_BYTE && |
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111 dataType != DataBuffer.TYPE_USHORT && |
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112 dataType != DataBuffer.TYPE_INT) { |
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113 throw new IllegalArgumentException("Unsupported data type "+ |
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114 dataType); |
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115 } |
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116 } |
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117 |
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118 /** |
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119 * Constructs a SinglePixelPackedSampleModel with bitMasks.length bands |
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120 * and a scanline stride equal to scanlineStride data array elements. |
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121 * Each sample is stored in a data array element in the position of |
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122 * its corresponding bit mask. Each bit mask must be contiguous and |
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123 * masks must not overlap. |
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124 * @param dataType The data type for storing samples. |
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125 * @param w The width (in pixels) of the region of |
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126 * image data described. |
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127 * @param h The height (in pixels) of the region of |
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128 * image data described. |
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129 * @param scanlineStride The line stride of the image data. |
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130 * @param bitMasks The bit masks for all bands. |
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131 * @throws IllegalArgumentException if <code>w</code> or |
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132 * <code>h</code> is not greater than 0 |
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133 * @throws IllegalArgumentException if any mask in |
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134 * <code>bitMask</code> is not contiguous |
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135 * @throws IllegalArgumentException if <code>dataType</code> is not |
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136 * either <code>DataBuffer.TYPE_BYTE</code>, |
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137 * <code>DataBuffer.TYPE_USHORT</code>, or |
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138 * <code>DataBuffer.TYPE_INT</code> |
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139 */ |
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140 public SinglePixelPackedSampleModel(int dataType, int w, int h, |
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141 int scanlineStride, int bitMasks[]) { |
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142 super(dataType, w, h, bitMasks.length); |
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143 if (dataType != DataBuffer.TYPE_BYTE && |
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144 dataType != DataBuffer.TYPE_USHORT && |
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145 dataType != DataBuffer.TYPE_INT) { |
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146 throw new IllegalArgumentException("Unsupported data type "+ |
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147 dataType); |
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148 } |
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149 this.dataType = dataType; |
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150 this.bitMasks = (int[]) bitMasks.clone(); |
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151 this.scanlineStride = scanlineStride; |
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152 |
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153 this.bitOffsets = new int[numBands]; |
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154 this.bitSizes = new int[numBands]; |
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155 |
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156 this.maxBitSize = 0; |
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157 for (int i=0; i<numBands; i++) { |
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158 int bitOffset = 0, bitSize = 0, mask; |
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159 mask = bitMasks[i]; |
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160 |
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161 if (mask != 0) { |
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162 while ((mask & 1) == 0) { |
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163 mask = mask >>> 1; |
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164 bitOffset++; |
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165 } |
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166 while ((mask & 1) == 1) { |
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167 mask = mask >>> 1; |
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168 bitSize++; |
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169 } |
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170 if (mask != 0) { |
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171 throw new IllegalArgumentException("Mask "+bitMasks[i]+ |
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172 " must be contiguous"); |
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173 } |
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174 } |
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175 bitOffsets[i] = bitOffset; |
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176 bitSizes[i] = bitSize; |
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177 if (bitSize > maxBitSize) { |
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178 maxBitSize = bitSize; |
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179 } |
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180 } |
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181 } |
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182 |
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183 /** |
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184 * Returns the number of data elements needed to transfer one pixel |
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185 * via the getDataElements and setDataElements methods. |
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186 * For a SinglePixelPackedSampleModel, this is one. |
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187 */ |
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188 public int getNumDataElements() { |
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189 return 1; |
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190 } |
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191 |
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192 /** |
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193 * Returns the size of the buffer (in data array elements) |
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194 * needed for a data buffer that matches this |
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195 * SinglePixelPackedSampleModel. |
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196 */ |
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197 private long getBufferSize() { |
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198 long size = scanlineStride * (height-1) + width; |
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199 return size; |
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200 } |
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201 |
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202 /** |
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203 * Creates a new SinglePixelPackedSampleModel with the specified |
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204 * width and height. The new SinglePixelPackedSampleModel will have the |
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205 * same storage data type and bit masks as this |
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206 * SinglePixelPackedSampleModel. |
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207 * @param w the width of the resulting <code>SampleModel</code> |
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208 * @param h the height of the resulting <code>SampleModel</code> |
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209 * @return a <code>SinglePixelPackedSampleModel</code> with the |
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210 * specified width and height. |
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211 * @throws IllegalArgumentException if <code>w</code> or |
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212 * <code>h</code> is not greater than 0 |
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213 */ |
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214 public SampleModel createCompatibleSampleModel(int w, int h) { |
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215 SampleModel sampleModel = new SinglePixelPackedSampleModel(dataType, w, h, |
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216 bitMasks); |
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217 return sampleModel; |
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218 } |
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219 |
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220 /** |
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221 * Creates a DataBuffer that corresponds to this |
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222 * SinglePixelPackedSampleModel. The DataBuffer's data type and size |
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223 * will be consistent with this SinglePixelPackedSampleModel. The |
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224 * DataBuffer will have a single bank. |
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225 */ |
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226 public DataBuffer createDataBuffer() { |
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227 DataBuffer dataBuffer = null; |
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228 |
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229 int size = (int)getBufferSize(); |
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230 switch (dataType) { |
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231 case DataBuffer.TYPE_BYTE: |
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232 dataBuffer = new DataBufferByte(size); |
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233 break; |
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234 case DataBuffer.TYPE_USHORT: |
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235 dataBuffer = new DataBufferUShort(size); |
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236 break; |
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237 case DataBuffer.TYPE_INT: |
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238 dataBuffer = new DataBufferInt(size); |
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239 break; |
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240 } |
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241 return dataBuffer; |
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242 } |
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243 |
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244 /** Returns the number of bits per sample for all bands. */ |
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245 public int[] getSampleSize() { |
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246 int mask; |
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247 int sampleSize[] = new int [numBands]; |
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248 for (int i=0; i<numBands; i++) { |
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249 sampleSize[i] = 0; |
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250 mask = bitMasks[i] >>> bitOffsets[i]; |
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251 while ((mask & 1) != 0) { |
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252 sampleSize[i] ++; |
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253 mask = mask >>> 1; |
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254 } |
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255 } |
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256 |
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257 return sampleSize; |
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258 } |
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259 |
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260 /** Returns the number of bits per sample for the specified band. */ |
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261 public int getSampleSize(int band) { |
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262 int sampleSize = 0; |
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263 int mask = bitMasks[band] >>> bitOffsets[band]; |
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264 while ((mask & 1) != 0) { |
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265 sampleSize ++; |
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266 mask = mask >>> 1; |
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267 } |
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268 |
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269 return sampleSize; |
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270 } |
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271 |
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272 /** Returns the offset (in data array elements) of pixel (x,y). |
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273 * The data element containing pixel <code>x,y</code> |
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274 * can be retrieved from a DataBuffer <code>data</code> with a |
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275 * SinglePixelPackedSampleModel <code>sppsm</code> as: |
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276 * <pre> |
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277 * data.getElem(sppsm.getOffset(x, y)); |
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278 * </pre> |
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279 * @param x the X coordinate of the specified pixel |
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280 * @param y the Y coordinate of the specified pixel |
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281 * @return the offset of the specified pixel. |
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282 */ |
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283 public int getOffset(int x, int y) { |
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284 int offset = y * scanlineStride + x; |
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285 return offset; |
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286 } |
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287 |
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288 /** Returns the bit offsets into the data array element representing |
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289 * a pixel for all bands. |
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290 * @return the bit offsets representing a pixel for all bands. |
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291 */ |
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292 public int [] getBitOffsets() { |
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293 return (int[])bitOffsets.clone(); |
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294 } |
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295 |
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296 /** Returns the bit masks for all bands. |
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297 * @return the bit masks for all bands. |
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298 */ |
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299 public int [] getBitMasks() { |
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300 return (int[])bitMasks.clone(); |
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301 } |
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302 |
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303 /** Returns the scanline stride of this SinglePixelPackedSampleModel. |
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304 * @return the scanline stride of this |
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305 * <code>SinglePixelPackedSampleModel</code>. |
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306 */ |
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307 public int getScanlineStride() { |
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308 return scanlineStride; |
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309 } |
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310 |
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311 /** |
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312 * This creates a new SinglePixelPackedSampleModel with a subset of the |
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313 * bands of this SinglePixelPackedSampleModel. The new |
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314 * SinglePixelPackedSampleModel can be used with any DataBuffer that the |
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315 * existing SinglePixelPackedSampleModel can be used with. The new |
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316 * SinglePixelPackedSampleModel/DataBuffer combination will represent |
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317 * an image with a subset of the bands of the original |
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318 * SinglePixelPackedSampleModel/DataBuffer combination. |
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319 * @exception RasterFormatException if the length of the bands argument is |
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320 * greater than the number of bands in |
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321 * the sample model. |
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322 */ |
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323 public SampleModel createSubsetSampleModel(int bands[]) { |
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324 if (bands.length > numBands) |
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325 throw new RasterFormatException("There are only " + |
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326 numBands + |
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327 " bands"); |
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328 int newBitMasks[] = new int[bands.length]; |
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329 for (int i=0; i<bands.length; i++) |
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330 newBitMasks[i] = bitMasks[bands[i]]; |
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331 |
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332 return new SinglePixelPackedSampleModel(this.dataType, width, height, |
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333 this.scanlineStride, newBitMasks); |
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334 } |
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335 |
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336 /** |
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337 * Returns data for a single pixel in a primitive array of type |
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338 * TransferType. For a SinglePixelPackedSampleModel, the array will |
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339 * have one element, and the type will be the same as the storage |
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340 * data type. Generally, obj |
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341 * should be passed in as null, so that the Object will be created |
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342 * automatically and will be of the right primitive data type. |
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343 * <p> |
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344 * The following code illustrates transferring data for one pixel from |
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345 * DataBuffer <code>db1</code>, whose storage layout is described by |
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346 * SinglePixelPackedSampleModel <code>sppsm1</code>, to |
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347 * DataBuffer <code>db2</code>, whose storage layout is described by |
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348 * SinglePixelPackedSampleModel <code>sppsm2</code>. |
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349 * The transfer will generally be more efficient than using |
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350 * getPixel/setPixel. |
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351 * <pre> |
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352 * SinglePixelPackedSampleModel sppsm1, sppsm2; |
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353 * DataBufferInt db1, db2; |
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354 * sppsm2.setDataElements(x, y, sppsm1.getDataElements(x, y, null, |
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355 * db1), db2); |
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356 * </pre> |
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357 * Using getDataElements/setDataElements to transfer between two |
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358 * DataBuffer/SampleModel pairs is legitimate if the SampleModels have |
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359 * the same number of bands, corresponding bands have the same number of |
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360 * bits per sample, and the TransferTypes are the same. |
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361 * <p> |
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362 * If obj is non-null, it should be a primitive array of type TransferType. |
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363 * Otherwise, a ClassCastException is thrown. An |
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364 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
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365 * not in bounds, or if obj is non-null and is not large enough to hold |
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366 * the pixel data. |
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367 * @param x The X coordinate of the pixel location. |
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368 * @param y The Y coordinate of the pixel location. |
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369 * @param obj If non-null, a primitive array in which to return |
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370 * the pixel data. |
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371 * @param data The DataBuffer containing the image data. |
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372 * @return the data for the specified pixel. |
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373 * @see #setDataElements(int, int, Object, DataBuffer) |
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374 */ |
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375 public Object getDataElements(int x, int y, Object obj, DataBuffer data) { |
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376 // Bounds check for 'b' will be performed automatically |
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377 if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
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378 throw new ArrayIndexOutOfBoundsException |
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379 ("Coordinate out of bounds!"); |
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380 } |
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381 |
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382 int type = getTransferType(); |
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383 |
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384 switch(type) { |
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385 |
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386 case DataBuffer.TYPE_BYTE: |
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387 |
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388 byte[] bdata; |
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389 |
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390 if (obj == null) |
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391 bdata = new byte[1]; |
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392 else |
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393 bdata = (byte[])obj; |
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394 |
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395 bdata[0] = (byte)data.getElem(y * scanlineStride + x); |
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396 |
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397 obj = (Object)bdata; |
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398 break; |
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399 |
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400 case DataBuffer.TYPE_USHORT: |
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401 |
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402 short[] sdata; |
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403 |
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404 if (obj == null) |
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405 sdata = new short[1]; |
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406 else |
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407 sdata = (short[])obj; |
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408 |
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409 sdata[0] = (short)data.getElem(y * scanlineStride + x); |
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410 |
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411 obj = (Object)sdata; |
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412 break; |
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413 |
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414 case DataBuffer.TYPE_INT: |
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415 |
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416 int[] idata; |
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417 |
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418 if (obj == null) |
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419 idata = new int[1]; |
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420 else |
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421 idata = (int[])obj; |
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422 |
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423 idata[0] = data.getElem(y * scanlineStride + x); |
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424 |
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425 obj = (Object)idata; |
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426 break; |
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427 } |
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428 |
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429 return obj; |
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430 } |
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431 |
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432 /** |
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433 * Returns all samples in for the specified pixel in an int array. |
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434 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
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435 * not in bounds. |
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436 * @param x The X coordinate of the pixel location. |
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437 * @param y The Y coordinate of the pixel location. |
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438 * @param iArray If non-null, returns the samples in this array |
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439 * @param data The DataBuffer containing the image data. |
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440 * @return all samples for the specified pixel. |
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441 * @see #setPixel(int, int, int[], DataBuffer) |
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442 */ |
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443 public int [] getPixel(int x, int y, int iArray[], DataBuffer data) { |
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444 if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
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445 throw new ArrayIndexOutOfBoundsException |
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446 ("Coordinate out of bounds!"); |
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447 } |
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448 int pixels[]; |
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449 if (iArray == null) { |
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450 pixels = new int [numBands]; |
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451 } else { |
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452 pixels = iArray; |
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453 } |
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454 |
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455 int value = data.getElem(y * scanlineStride + x); |
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456 for (int i=0; i<numBands; i++) { |
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457 pixels[i] = (value & bitMasks[i]) >>> bitOffsets[i]; |
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458 } |
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459 return pixels; |
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460 } |
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461 |
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462 /** |
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463 * Returns all samples for the specified rectangle of pixels in |
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464 * an int array, one sample per array element. |
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465 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
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466 * not in bounds. |
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467 * @param x The X coordinate of the upper left pixel location. |
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468 * @param y The Y coordinate of the upper left pixel location. |
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469 * @param w The width of the pixel rectangle. |
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470 * @param h The height of the pixel rectangle. |
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471 * @param iArray If non-null, returns the samples in this array. |
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472 * @param data The DataBuffer containing the image data. |
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473 * @return all samples for the specified region of pixels. |
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474 * @see #setPixels(int, int, int, int, int[], DataBuffer) |
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475 */ |
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476 public int[] getPixels(int x, int y, int w, int h, |
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477 int iArray[], DataBuffer data) { |
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478 if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
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479 throw new ArrayIndexOutOfBoundsException |
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480 ("Coordinate out of bounds!"); |
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481 } |
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482 int pixels[]; |
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483 if (iArray != null) { |
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484 pixels = iArray; |
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485 } else { |
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486 pixels = new int [w*h*numBands]; |
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487 } |
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488 int lineOffset = y*scanlineStride + x; |
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489 int dstOffset = 0; |
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490 |
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491 for (int i = 0; i < h; i++) { |
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492 for (int j = 0; j < w; j++) { |
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493 int value = data.getElem(lineOffset+j); |
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494 for (int k=0; k < numBands; k++) { |
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495 pixels[dstOffset++] = |
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496 ((value & bitMasks[k]) >>> bitOffsets[k]); |
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497 } |
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498 } |
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499 lineOffset += scanlineStride; |
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500 } |
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501 return pixels; |
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502 } |
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503 |
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504 /** |
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505 * Returns as int the sample in a specified band for the pixel |
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506 * located at (x,y). |
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507 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
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508 * not in bounds. |
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509 * @param x The X coordinate of the pixel location. |
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510 * @param y The Y coordinate of the pixel location. |
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511 * @param b The band to return. |
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512 * @param data The DataBuffer containing the image data. |
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513 * @return the sample in a specified band for the specified |
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514 * pixel. |
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515 * @see #setSample(int, int, int, int, DataBuffer) |
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516 */ |
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517 public int getSample(int x, int y, int b, DataBuffer data) { |
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518 // Bounds check for 'b' will be performed automatically |
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519 if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
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520 throw new ArrayIndexOutOfBoundsException |
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521 ("Coordinate out of bounds!"); |
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522 } |
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523 int sample = data.getElem(y * scanlineStride + x); |
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524 return ((sample & bitMasks[b]) >>> bitOffsets[b]); |
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525 } |
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526 |
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527 /** |
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528 * Returns the samples for a specified band for the specified rectangle |
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529 * of pixels in an int array, one sample per array element. |
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530 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
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531 * not in bounds. |
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532 * @param x The X coordinate of the upper left pixel location. |
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533 * @param y The Y coordinate of the upper left pixel location. |
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534 * @param w The width of the pixel rectangle. |
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535 * @param h The height of the pixel rectangle. |
|
536 * @param b The band to return. |
|
537 * @param iArray If non-null, returns the samples in this array. |
|
538 * @param data The DataBuffer containing the image data. |
|
539 * @return the samples for the specified band for the specified |
|
540 * region of pixels. |
|
541 * @see #setSamples(int, int, int, int, int, int[], DataBuffer) |
|
542 */ |
|
543 public int[] getSamples(int x, int y, int w, int h, int b, |
|
544 int iArray[], DataBuffer data) { |
|
545 // Bounds check for 'b' will be performed automatically |
|
546 if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
|
547 throw new ArrayIndexOutOfBoundsException |
|
548 ("Coordinate out of bounds!"); |
|
549 } |
|
550 int samples[]; |
|
551 if (iArray != null) { |
|
552 samples = iArray; |
|
553 } else { |
|
554 samples = new int [w*h]; |
|
555 } |
|
556 int lineOffset = y*scanlineStride + x; |
|
557 int dstOffset = 0; |
|
558 |
|
559 for (int i = 0; i < h; i++) { |
|
560 for (int j = 0; j < w; j++) { |
|
561 int value = data.getElem(lineOffset+j); |
|
562 samples[dstOffset++] = |
|
563 ((value & bitMasks[b]) >>> bitOffsets[b]); |
|
564 } |
|
565 lineOffset += scanlineStride; |
|
566 } |
|
567 return samples; |
|
568 } |
|
569 |
|
570 /** |
|
571 * Sets the data for a single pixel in the specified DataBuffer from a |
|
572 * primitive array of type TransferType. For a |
|
573 * SinglePixelPackedSampleModel, only the first element of the array |
|
574 * will hold valid data, and the type of the array must be the same as |
|
575 * the storage data type of the SinglePixelPackedSampleModel. |
|
576 * <p> |
|
577 * The following code illustrates transferring data for one pixel from |
|
578 * DataBuffer <code>db1</code>, whose storage layout is described by |
|
579 * SinglePixelPackedSampleModel <code>sppsm1</code>, |
|
580 * to DataBuffer <code>db2</code>, whose storage layout is described by |
|
581 * SinglePixelPackedSampleModel <code>sppsm2</code>. |
|
582 * The transfer will generally be more efficient than using |
|
583 * getPixel/setPixel. |
|
584 * <pre> |
|
585 * SinglePixelPackedSampleModel sppsm1, sppsm2; |
|
586 * DataBufferInt db1, db2; |
|
587 * sppsm2.setDataElements(x, y, sppsm1.getDataElements(x, y, null, |
|
588 * db1), db2); |
|
589 * </pre> |
|
590 * Using getDataElements/setDataElements to transfer between two |
|
591 * DataBuffer/SampleModel pairs is legitimate if the SampleModels have |
|
592 * the same number of bands, corresponding bands have the same number of |
|
593 * bits per sample, and the TransferTypes are the same. |
|
594 * <p> |
|
595 * obj must be a primitive array of type TransferType. Otherwise, |
|
596 * a ClassCastException is thrown. An |
|
597 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
|
598 * not in bounds, or if obj is not large enough to hold the pixel data. |
|
599 * @param x The X coordinate of the pixel location. |
|
600 * @param y The Y coordinate of the pixel location. |
|
601 * @param obj A primitive array containing pixel data. |
|
602 * @param data The DataBuffer containing the image data. |
|
603 * @see #getDataElements(int, int, Object, DataBuffer) |
|
604 */ |
|
605 public void setDataElements(int x, int y, Object obj, DataBuffer data) { |
|
606 if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
|
607 throw new ArrayIndexOutOfBoundsException |
|
608 ("Coordinate out of bounds!"); |
|
609 } |
|
610 |
|
611 int type = getTransferType(); |
|
612 |
|
613 switch(type) { |
|
614 |
|
615 case DataBuffer.TYPE_BYTE: |
|
616 |
|
617 byte[] barray = (byte[])obj; |
|
618 data.setElem(y*scanlineStride+x, ((int)barray[0])&0xff); |
|
619 break; |
|
620 |
|
621 case DataBuffer.TYPE_USHORT: |
|
622 |
|
623 short[] sarray = (short[])obj; |
|
624 data.setElem(y*scanlineStride+x, ((int)sarray[0])&0xffff); |
|
625 break; |
|
626 |
|
627 case DataBuffer.TYPE_INT: |
|
628 |
|
629 int[] iarray = (int[])obj; |
|
630 data.setElem(y*scanlineStride+x, iarray[0]); |
|
631 break; |
|
632 } |
|
633 } |
|
634 |
|
635 /** |
|
636 * Sets a pixel in the DataBuffer using an int array of samples for input. |
|
637 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
|
638 * not in bounds. |
|
639 * @param x The X coordinate of the pixel location. |
|
640 * @param y The Y coordinate of the pixel location. |
|
641 * @param iArray The input samples in an int array. |
|
642 * @param data The DataBuffer containing the image data. |
|
643 * @see #getPixel(int, int, int[], DataBuffer) |
|
644 */ |
|
645 public void setPixel(int x, int y, |
|
646 int iArray[], |
|
647 DataBuffer data) { |
|
648 if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
|
649 throw new ArrayIndexOutOfBoundsException |
|
650 ("Coordinate out of bounds!"); |
|
651 } |
|
652 int lineOffset = y * scanlineStride + x; |
|
653 int value = data.getElem(lineOffset); |
|
654 for (int i=0; i < numBands; i++) { |
|
655 value &= ~bitMasks[i]; |
|
656 value |= ((iArray[i] << bitOffsets[i]) & bitMasks[i]); |
|
657 } |
|
658 data.setElem(lineOffset, value); |
|
659 } |
|
660 |
|
661 /** |
|
662 * Sets all samples for a rectangle of pixels from an int array containing |
|
663 * one sample per array element. |
|
664 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
|
665 * not in bounds. |
|
666 * @param x The X coordinate of the upper left pixel location. |
|
667 * @param y The Y coordinate of the upper left pixel location. |
|
668 * @param w The width of the pixel rectangle. |
|
669 * @param h The height of the pixel rectangle. |
|
670 * @param iArray The input samples in an int array. |
|
671 * @param data The DataBuffer containing the image data. |
|
672 * @see #getPixels(int, int, int, int, int[], DataBuffer) |
|
673 */ |
|
674 public void setPixels(int x, int y, int w, int h, |
|
675 int iArray[], DataBuffer data) { |
|
676 if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
|
677 throw new ArrayIndexOutOfBoundsException |
|
678 ("Coordinate out of bounds!"); |
|
679 } |
|
680 |
|
681 int lineOffset = y*scanlineStride + x; |
|
682 int srcOffset = 0; |
|
683 |
|
684 for (int i = 0; i < h; i++) { |
|
685 for (int j = 0; j < w; j++) { |
|
686 int value = data.getElem(lineOffset+j); |
|
687 for (int k=0; k < numBands; k++) { |
|
688 value &= ~bitMasks[k]; |
|
689 int srcValue = iArray[srcOffset++]; |
|
690 value |= ((srcValue << bitOffsets[k]) |
|
691 & bitMasks[k]); |
|
692 } |
|
693 data.setElem(lineOffset+j, value); |
|
694 } |
|
695 lineOffset += scanlineStride; |
|
696 } |
|
697 } |
|
698 |
|
699 /** |
|
700 * Sets a sample in the specified band for the pixel located at (x,y) |
|
701 * in the DataBuffer using an int for input. |
|
702 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
|
703 * not in bounds. |
|
704 * @param x The X coordinate of the pixel location. |
|
705 * @param y The Y coordinate of the pixel location. |
|
706 * @param b The band to set. |
|
707 * @param s The input sample as an int. |
|
708 * @param data The DataBuffer containing the image data. |
|
709 * @see #getSample(int, int, int, DataBuffer) |
|
710 */ |
|
711 public void setSample(int x, int y, int b, int s, |
|
712 DataBuffer data) { |
|
713 // Bounds check for 'b' will be performed automatically |
|
714 if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
|
715 throw new ArrayIndexOutOfBoundsException |
|
716 ("Coordinate out of bounds!"); |
|
717 } |
|
718 int value = data.getElem(y*scanlineStride + x); |
|
719 value &= ~bitMasks[b]; |
|
720 value |= (s << bitOffsets[b]) & bitMasks[b]; |
|
721 data.setElem(y*scanlineStride + x,value); |
|
722 } |
|
723 |
|
724 /** |
|
725 * Sets the samples in the specified band for the specified rectangle |
|
726 * of pixels from an int array containing one sample per array element. |
|
727 * ArrayIndexOutOfBoundsException may be thrown if the coordinates are |
|
728 * not in bounds. |
|
729 * @param x The X coordinate of the upper left pixel location. |
|
730 * @param y The Y coordinate of the upper left pixel location. |
|
731 * @param w The width of the pixel rectangle. |
|
732 * @param h The height of the pixel rectangle. |
|
733 * @param b The band to set. |
|
734 * @param iArray The input samples in an int array. |
|
735 * @param data The DataBuffer containing the image data. |
|
736 * @see #getSamples(int, int, int, int, int, int[], DataBuffer) |
|
737 */ |
|
738 public void setSamples(int x, int y, int w, int h, int b, |
|
739 int iArray[], DataBuffer data) { |
|
740 // Bounds check for 'b' will be performed automatically |
|
741 if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
|
742 throw new ArrayIndexOutOfBoundsException |
|
743 ("Coordinate out of bounds!"); |
|
744 } |
|
745 int lineOffset = y*scanlineStride + x; |
|
746 int srcOffset = 0; |
|
747 |
|
748 for (int i = 0; i < h; i++) { |
|
749 for (int j = 0; j < w; j++) { |
|
750 int value = data.getElem(lineOffset+j); |
|
751 value &= ~bitMasks[b]; |
|
752 int sample = iArray[srcOffset++]; |
|
753 value |= ((int)sample << bitOffsets[b]) & bitMasks[b]; |
|
754 data.setElem(lineOffset+j,value); |
|
755 } |
|
756 lineOffset += scanlineStride; |
|
757 } |
|
758 } |
|
759 |
|
760 public boolean equals(Object o) { |
|
761 if ((o == null) || !(o instanceof SinglePixelPackedSampleModel)) { |
|
762 return false; |
|
763 } |
|
764 |
|
765 SinglePixelPackedSampleModel that = (SinglePixelPackedSampleModel)o; |
|
766 return this.width == that.width && |
|
767 this.height == that.height && |
|
768 this.numBands == that.numBands && |
|
769 this.dataType == that.dataType && |
|
770 Arrays.equals(this.bitMasks, that.bitMasks) && |
|
771 Arrays.equals(this.bitOffsets, that.bitOffsets) && |
|
772 Arrays.equals(this.bitSizes, that.bitSizes) && |
|
773 this.maxBitSize == that.maxBitSize && |
|
774 this.scanlineStride == that.scanlineStride; |
|
775 } |
|
776 |
|
777 // If we implement equals() we must also implement hashCode |
|
778 public int hashCode() { |
|
779 int hash = 0; |
|
780 hash = width; |
|
781 hash <<= 8; |
|
782 hash ^= height; |
|
783 hash <<= 8; |
|
784 hash ^= numBands; |
|
785 hash <<= 8; |
|
786 hash ^= dataType; |
|
787 hash <<= 8; |
|
788 for (int i = 0; i < bitMasks.length; i++) { |
|
789 hash ^= bitMasks[i]; |
|
790 hash <<= 8; |
|
791 } |
|
792 for (int i = 0; i < bitOffsets.length; i++) { |
|
793 hash ^= bitOffsets[i]; |
|
794 hash <<= 8; |
|
795 } |
|
796 for (int i = 0; i < bitSizes.length; i++) { |
|
797 hash ^= bitSizes[i]; |
|
798 hash <<= 8; |
|
799 } |
|
800 hash ^= maxBitSize; |
|
801 hash <<= 8; |
|
802 hash ^= scanlineStride; |
|
803 return hash; |
|
804 } |
|
805 } |