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    2    * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
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    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
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   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
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   25   
   26   /* ****************************************************************
   27    ******************************************************************
   28    ******************************************************************
   29    *** COPYRIGHT (c) Eastman Kodak Company, 1997
   30    *** As  an unpublished  work pursuant to Title 17 of the United
   31    *** States Code.  All rights reserved.
   32    ******************************************************************
   33    ******************************************************************
   34    ******************************************************************/
   35   
   36   
   37   package java.awt.image;
   38   import java.awt.Rectangle;
   39   import java.awt.Point;
   40   
   41   import sun.awt.image.ByteInterleavedRaster;
   42   import sun.awt.image.ShortInterleavedRaster;
   43   import sun.awt.image.IntegerInterleavedRaster;
   44   import sun.awt.image.ByteBandedRaster;
   45   import sun.awt.image.ShortBandedRaster;
   46   import sun.awt.image.BytePackedRaster;
   47   import sun.awt.image.SunWritableRaster;
   48   
   49   /**
   50    * A class representing a rectangular array of pixels.  A Raster
   51    * encapsulates a DataBuffer that stores the sample values and a
   52    * SampleModel that describes how to locate a given sample value in a
   53    * DataBuffer.
   54    * <p>
   55    * A Raster defines values for pixels occupying a particular
   56    * rectangular area of the plane, not necessarily including (0, 0).
   57    * The rectangle, known as the Raster's bounding rectangle and
   58    * available by means of the getBounds method, is defined by minX,
   59    * minY, width, and height values.  The minX and minY values define
   60    * the coordinate of the upper left corner of the Raster.  References
   61    * to pixels outside of the bounding rectangle may result in an
   62    * exception being thrown, or may result in references to unintended
   63    * elements of the Raster's associated DataBuffer.  It is the user's
   64    * responsibility to avoid accessing such pixels.
   65    * <p>
   66    * A SampleModel describes how samples of a Raster
   67    * are stored in the primitive array elements of a DataBuffer.
   68    * Samples may be stored one per data element, as in a
   69    * PixelInterleavedSampleModel or BandedSampleModel, or packed several to
   70    * an element, as in a SinglePixelPackedSampleModel or
   71    * MultiPixelPackedSampleModel.  The SampleModel is also
   72    * controls whether samples are sign extended, allowing unsigned
   73    * data to be stored in signed Java data types such as byte, short, and
   74    * int.
   75    * <p>
   76    * Although a Raster may live anywhere in the plane, a SampleModel
   77    * makes use of a simple coordinate system that starts at (0, 0).  A
   78    * Raster therefore contains a translation factor that allows pixel
   79    * locations to be mapped between the Raster's coordinate system and
   80    * that of the SampleModel.  The translation from the SampleModel
   81    * coordinate system to that of the Raster may be obtained by the
   82    * getSampleModelTranslateX and getSampleModelTranslateY methods.
   83    * <p>
   84    * A Raster may share a DataBuffer with another Raster either by
   85    * explicit construction or by the use of the createChild and
   86    * createTranslatedChild methods.  Rasters created by these methods
   87    * can return a reference to the Raster they were created from by
   88    * means of the getParent method.  For a Raster that was not
   89    * constructed by means of a call to createTranslatedChild or
   90    * createChild, getParent will return null.
   91    * <p>
   92    * The createTranslatedChild method returns a new Raster that
   93    * shares all of the data of the current Raster, but occupies a
   94    * bounding rectangle of the same width and height but with a
   95    * different starting point.  For example, if the parent Raster
   96    * occupied the region (10, 10) to (100, 100), and the translated
   97    * Raster was defined to start at (50, 50), then pixel (20, 20) of the
   98    * parent and pixel (60, 60) of the child occupy the same location in
   99    * the DataBuffer shared by the two Rasters.  In the first case, (-10,
  100    * -10) should be added to a pixel coordinate to obtain the
  101    * corresponding SampleModel coordinate, and in the second case (-50,
  102    * -50) should be added.
  103    * <p>
  104    * The translation between a parent and child Raster may be
  105    * determined by subtracting the child's sampleModelTranslateX and
  106    * sampleModelTranslateY values from those of the parent.
  107    * <p>
  108    * The createChild method may be used to create a new Raster
  109    * occupying only a subset of its parent's bounding rectangle
  110    * (with the same or a translated coordinate system) or
  111    * with a subset of the bands of its parent.
  112    * <p>
  113    * All constructors are protected.  The correct way to create a
  114    * Raster is to use one of the static create methods defined in this
  115    * class.  These methods create instances of Raster that use the
  116    * standard Interleaved, Banded, and Packed SampleModels and that may
  117    * be processed more efficiently than a Raster created by combining
  118    * an externally generated SampleModel and DataBuffer.
  119    * @see java.awt.image.DataBuffer
  120    * @see java.awt.image.SampleModel
  121    * @see java.awt.image.PixelInterleavedSampleModel
  122    * @see java.awt.image.BandedSampleModel
  123    * @see java.awt.image.SinglePixelPackedSampleModel
  124    * @see java.awt.image.MultiPixelPackedSampleModel
  125    */
  126   public class Raster {
  127   
  128       /**
  129        * The SampleModel that describes how pixels from this Raster
  130        * are stored in the DataBuffer.
  131        */
  132       protected SampleModel sampleModel;
  133   
  134       /** The DataBuffer that stores the image data. */
  135       protected DataBuffer dataBuffer;
  136   
  137       /** The X coordinate of the upper-left pixel of this Raster. */
  138       protected int minX;
  139   
  140       /** The Y coordinate of the upper-left pixel of this Raster. */
  141       protected int minY;
  142   
  143       /** The width of this Raster. */
  144       protected int width;
  145   
  146       /** The height of this Raster. */
  147       protected int height;
  148   
  149       /**
  150        * The X translation from the coordinate space of the
  151        * Raster's SampleModel to that of the Raster.
  152        */
  153       protected int sampleModelTranslateX;
  154   
  155       /**
  156        * The Y translation from the coordinate space of the
  157        * Raster's SampleModel to that of the Raster.
  158        */
  159       protected int sampleModelTranslateY;
  160   
  161       /** The number of bands in the Raster. */
  162       protected int numBands;
  163   
  164       /** The number of DataBuffer data elements per pixel. */
  165       protected int numDataElements;
  166   
  167       /** The parent of this Raster, or null. */
  168       protected Raster parent;
  169   
  170       static private native void initIDs();
  171       static {
  172           ColorModel.loadLibraries();
  173           initIDs();
  174       }
  175   
  176       /**
  177        * Creates a Raster based on a PixelInterleavedSampleModel with the
  178        * specified data type, width, height, and number of bands.
  179        *
  180        * <p> The upper left corner of the Raster is given by the
  181        * location argument.  If location is null, (0, 0) will be used.
  182        * The dataType parameter should be one of the enumerated values
  183        * defined in the DataBuffer class.
  184        *
  185        * <p> Note that interleaved <code>DataBuffer.TYPE_INT</code>
  186        * Rasters are not supported.  To create a 1-band Raster of type
  187        * <code>DataBuffer.TYPE_INT</code>, use
  188        * Raster.createPackedRaster().
  189        * <p> The only dataTypes supported currently are TYPE_BYTE
  190        * and TYPE_USHORT.
  191        * @param dataType  the data type for storing samples
  192        * @param w         the width in pixels of the image data
  193        * @param h         the height in pixels of the image data
  194        * @param bands     the number of bands
  195        * @param location  the upper-left corner of the <code>Raster</code>
  196        * @return a WritableRaster object with the specified data type,
  197        *         width, height and number of bands.
  198        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  199        *         is less than or equal to zero, or computing either
  200        *         <code>location.x + w</code> or
  201        *         <code>location.y + h</code> results in integer
  202        *         overflow
  203        */
  204       public static WritableRaster createInterleavedRaster(int dataType,
  205                                                            int w, int h,
  206                                                            int bands,
  207                                                            Point location) {
  208           int[] bandOffsets = new int[bands];
  209           for (int i = 0; i < bands; i++) {
  210               bandOffsets[i] = i;
  211           }
  212           return createInterleavedRaster(dataType, w, h, w*bands, bands,
  213                                          bandOffsets, location);
  214       }
  215   
  216       /**
  217        * Creates a Raster based on a PixelInterleavedSampleModel with the
  218        * specified data type, width, height, scanline stride, pixel
  219        * stride, and band offsets.  The number of bands is inferred from
  220        * bandOffsets.length.
  221        *
  222        * <p> The upper left corner of the Raster is given by the
  223        * location argument.  If location is null, (0, 0) will be used.
  224        * The dataType parameter should be one of the enumerated values
  225        * defined in the DataBuffer class.
  226        *
  227        * <p> Note that interleaved <code>DataBuffer.TYPE_INT</code>
  228        * Rasters are not supported.  To create a 1-band Raster of type
  229        * <code>DataBuffer.TYPE_INT</code>, use
  230        * Raster.createPackedRaster().
  231        * <p> The only dataTypes supported currently are TYPE_BYTE
  232        * and TYPE_USHORT.
  233        * @param dataType  the data type for storing samples
  234        * @param w         the width in pixels of the image data
  235        * @param h         the height in pixels of the image data
  236        * @param scanlineStride the line stride of the image data
  237        * @param pixelStride the pixel stride of the image data
  238        * @param bandOffsets the offsets of all bands
  239        * @param location  the upper-left corner of the <code>Raster</code>
  240        * @return a WritableRaster object with the specified data type,
  241        *         width, height, scanline stride, pixel stride and band
  242        *         offsets.
  243        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  244        *         is less than or equal to zero, or computing either
  245        *         <code>location.x + w</code> or
  246        *         <code>location.y + h</code> results in integer
  247        *         overflow
  248        * @throws IllegalArgumentException if <code>dataType</code> is not
  249        *         one of the supported data types, which are
  250        *         <code>DataBuffer.TYPE_BYTE</code>, or
  251        *         <code>DataBuffer.TYPE_USHORT</code>.
  252        */
  253       public static WritableRaster createInterleavedRaster(int dataType,
  254                                                            int w, int h,
  255                                                            int scanlineStride,
  256                                                            int pixelStride,
  257                                                            int bandOffsets[],
  258                                                            Point location) {
  259           DataBuffer d;
  260           int bands = bandOffsets.length;
  261   
  262           int maxBandOff = bandOffsets[0];
  263           for (int i=1; i < bands; i++) {
  264               if (bandOffsets[i] > maxBandOff) {
  265                   maxBandOff = bandOffsets[i];
  266               }
  267           }
  268           int size = maxBandOff + scanlineStride*(h-1) + pixelStride*(w-1) + 1;
  269           switch(dataType) {
  270           case DataBuffer.TYPE_BYTE:
  271               d = new DataBufferByte(size);
  272               break;
  273   
  274           case DataBuffer.TYPE_USHORT:
  275               d = new DataBufferUShort(size);
  276               break;
  277   
  278           default:
  279               throw new IllegalArgumentException("Unsupported data type " +
  280                                                   dataType);
  281           }
  282   
  283           return createInterleavedRaster(d, w, h, scanlineStride,
  284                                          pixelStride, bandOffsets, location);
  285       }
  286   
  287       /**
  288        * Creates a Raster based on a BandedSampleModel with the
  289        * specified data type, width, height, and number of bands.
  290        *
  291        * <p> The upper left corner of the Raster is given by the
  292        * location argument.  If location is null, (0, 0) will be used.
  293        * The dataType parameter should be one of the enumerated values
  294        * defined in the DataBuffer class.
  295        *
  296        * <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
  297        * and TYPE_INT.
  298        * @param dataType  the data type for storing samples
  299        * @param w         the width in pixels of the image data
  300        * @param h         the height in pixels of the image data
  301        * @param bands     the number of bands
  302        * @param location  the upper-left corner of the <code>Raster</code>
  303        * @return a WritableRaster object with the specified data type,
  304        *         width, height and number of bands.
  305        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  306        *         is less than or equal to zero, or computing either
  307        *         <code>location.x + w</code> or
  308        *         <code>location.y + h</code> results in integer
  309        *         overflow
  310        * @throws ArrayIndexOutOfBoundsException if <code>bands</code>
  311        *         is less than 1
  312        */
  313       public static WritableRaster createBandedRaster(int dataType,
  314                                                       int w, int h,
  315                                                       int bands,
  316                                                       Point location) {
  317           if (bands < 1) {
  318               throw new ArrayIndexOutOfBoundsException("Number of bands ("+
  319                                                        bands+") must"+
  320                                                        " be greater than 0");
  321           }
  322           int[] bankIndices = new int[bands];
  323           int[] bandOffsets = new int[bands];
  324           for (int i = 0; i < bands; i++) {
  325               bankIndices[i] = i;
  326               bandOffsets[i] = 0;
  327           }
  328   
  329           return createBandedRaster(dataType, w, h, w,
  330                                     bankIndices, bandOffsets,
  331                                     location);
  332       }
  333   
  334       /**
  335        * Creates a Raster based on a BandedSampleModel with the
  336        * specified data type, width, height, scanline stride, bank
  337        * indices and band offsets.  The number of bands is inferred from
  338        * bankIndices.length and bandOffsets.length, which must be the
  339        * same.
  340        *
  341        * <p> The upper left corner of the Raster is given by the
  342        * location argument.  The dataType parameter should be one of the
  343        * enumerated values defined in the DataBuffer class.
  344        *
  345        * <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
  346        * and TYPE_INT.
  347        * @param dataType  the data type for storing samples
  348        * @param w         the width in pixels of the image data
  349        * @param h         the height in pixels of the image data
  350        * @param scanlineStride the line stride of the image data
  351        * @param bankIndices the bank indices for each band
  352        * @param bandOffsets the offsets of all bands
  353        * @param location  the upper-left corner of the <code>Raster</code>
  354        * @return a WritableRaster object with the specified data type,
  355        *         width, height, scanline stride, bank indices and band
  356        *         offsets.
  357        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  358        *         is less than or equal to zero, or computing either
  359        *         <code>location.x + w</code> or
  360        *         <code>location.y + h</code> results in integer
  361        *         overflow
  362        * @throws IllegalArgumentException if <code>dataType</code> is not
  363        *         one of the supported data types, which are
  364        *         <code>DataBuffer.TYPE_BYTE</code>,
  365        *         <code>DataBuffer.TYPE_USHORT</code>
  366        *         or <code>DataBuffer.TYPE_INT</code>
  367        * @throws ArrayIndexOutOfBoundsException if <code>bankIndices</code>
  368        *         or <code>bandOffsets</code> is <code>null</code>
  369        */
  370       public static WritableRaster createBandedRaster(int dataType,
  371                                                       int w, int h,
  372                                                       int scanlineStride,
  373                                                       int bankIndices[],
  374                                                       int bandOffsets[],
  375                                                       Point location) {
  376           DataBuffer d;
  377           int bands = bandOffsets.length;
  378   
  379           if (bankIndices == null) {
  380               throw new
  381                   ArrayIndexOutOfBoundsException("Bank indices array is null");
  382           }
  383           if (bandOffsets == null) {
  384               throw new
  385                   ArrayIndexOutOfBoundsException("Band offsets array is null");
  386           }
  387   
  388           // Figure out the #banks and the largest band offset
  389           int maxBank = bankIndices[0];
  390           int maxBandOff = bandOffsets[0];
  391           for (int i = 1; i < bands; i++) {
  392               if (bankIndices[i] > maxBank) {
  393                   maxBank = bankIndices[i];
  394               }
  395               if (bandOffsets[i] > maxBandOff) {
  396                   maxBandOff = bandOffsets[i];
  397               }
  398           }
  399           int banks = maxBank + 1;
  400           int size = maxBandOff + scanlineStride*(h-1) + (w-1) + 1;
  401   
  402           switch(dataType) {
  403           case DataBuffer.TYPE_BYTE:
  404               d = new DataBufferByte(size, banks);
  405               break;
  406   
  407           case DataBuffer.TYPE_USHORT:
  408               d = new DataBufferUShort(size, banks);
  409               break;
  410   
  411           case DataBuffer.TYPE_INT:
  412               d = new DataBufferInt(size, banks);
  413               break;
  414   
  415           default:
  416               throw new IllegalArgumentException("Unsupported data type " +
  417                                                   dataType);
  418           }
  419   
  420           return createBandedRaster(d, w, h, scanlineStride,
  421                                     bankIndices, bandOffsets, location);
  422       }
  423   
  424       /**
  425        * Creates a Raster based on a SinglePixelPackedSampleModel with
  426        * the specified data type, width, height, and band masks.
  427        * The number of bands is inferred from bandMasks.length.
  428        *
  429        * <p> The upper left corner of the Raster is given by the
  430        * location argument.  If location is null, (0, 0) will be used.
  431        * The dataType parameter should be one of the enumerated values
  432        * defined in the DataBuffer class.
  433        *
  434        * <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
  435        * and TYPE_INT.
  436        * @param dataType  the data type for storing samples
  437        * @param w         the width in pixels of the image data
  438        * @param h         the height in pixels of the image data
  439        * @param bandMasks an array containing an entry for each band
  440        * @param location  the upper-left corner of the <code>Raster</code>
  441        * @return a WritableRaster object with the specified data type,
  442        *         width, height, and band masks.
  443        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  444        *         is less than or equal to zero, or computing either
  445        *         <code>location.x + w</code> or
  446        *         <code>location.y + h</code> results in integer
  447        *         overflow
  448        * @throws IllegalArgumentException if <code>dataType</code> is not
  449        *         one of the supported data types, which are
  450        *         <code>DataBuffer.TYPE_BYTE</code>,
  451        *         <code>DataBuffer.TYPE_USHORT</code>
  452        *         or <code>DataBuffer.TYPE_INT</code>
  453        */
  454       public static WritableRaster createPackedRaster(int dataType,
  455                                                       int w, int h,
  456                                                       int bandMasks[],
  457                                                       Point location) {
  458           DataBuffer d;
  459   
  460           switch(dataType) {
  461           case DataBuffer.TYPE_BYTE:
  462               d = new DataBufferByte(w*h);
  463               break;
  464   
  465           case DataBuffer.TYPE_USHORT:
  466               d = new DataBufferUShort(w*h);
  467               break;
  468   
  469           case DataBuffer.TYPE_INT:
  470               d = new DataBufferInt(w*h);
  471               break;
  472   
  473           default:
  474               throw new IllegalArgumentException("Unsupported data type " +
  475                                                   dataType);
  476           }
  477   
  478           return createPackedRaster(d, w, h, w, bandMasks, location);
  479       }
  480   
  481       /**
  482        * Creates a Raster based on a packed SampleModel with the
  483        * specified data type, width, height, number of bands, and bits
  484        * per band.  If the number of bands is one, the SampleModel will
  485        * be a MultiPixelPackedSampleModel.
  486        *
  487        * <p> If the number of bands is more than one, the SampleModel
  488        * will be a SinglePixelPackedSampleModel, with each band having
  489        * bitsPerBand bits.  In either case, the requirements on dataType
  490        * and bitsPerBand imposed by the corresponding SampleModel must
  491        * be met.
  492        *
  493        * <p> The upper left corner of the Raster is given by the
  494        * location argument.  If location is null, (0, 0) will be used.
  495        * The dataType parameter should be one of the enumerated values
  496        * defined in the DataBuffer class.
  497        *
  498        * <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
  499        * and TYPE_INT.
  500        * @param dataType  the data type for storing samples
  501        * @param w         the width in pixels of the image data
  502        * @param h         the height in pixels of the image data
  503        * @param bands     the number of bands
  504        * @param bitsPerBand the number of bits per band
  505        * @param location  the upper-left corner of the <code>Raster</code>
  506        * @return a WritableRaster object with the specified data type,
  507        *         width, height, number of bands, and bits per band.
  508        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  509        *         is less than or equal to zero, or computing either
  510        *         <code>location.x + w</code> or
  511        *         <code>location.y + h</code> results in integer
  512        *         overflow
  513        * @throws IllegalArgumentException if the product of
  514        *         <code>bitsPerBand</code> and <code>bands</code> is
  515        *         greater than the number of bits held by
  516        *         <code>dataType</code>
  517        * @throws IllegalArgumentException if <code>bitsPerBand</code> or
  518        *         <code>bands</code> is not greater than zero
  519        * @throws IllegalArgumentException if <code>dataType</code> is not
  520        *         one of the supported data types, which are
  521        *         <code>DataBuffer.TYPE_BYTE</code>,
  522        *         <code>DataBuffer.TYPE_USHORT</code>
  523        *         or <code>DataBuffer.TYPE_INT</code>
  524        */
  525       public static WritableRaster createPackedRaster(int dataType,
  526                                                       int w, int h,
  527                                                       int bands,
  528                                                       int bitsPerBand,
  529                                                       Point location) {
  530           DataBuffer d;
  531   
  532           if (bands <= 0) {
  533               throw new IllegalArgumentException("Number of bands ("+bands+
  534                                                  ") must be greater than 0");
  535           }
  536   
  537           if (bitsPerBand <= 0) {
  538               throw new IllegalArgumentException("Bits per band ("+bitsPerBand+
  539                                                  ") must be greater than 0");
  540           }
  541   
  542           if (bands != 1) {
  543               int[] masks = new int[bands];
  544               int mask = (1 << bitsPerBand) - 1;
  545               int shift = (bands-1)*bitsPerBand;
  546   
  547               /* Make sure the total mask size will fit in the data type */
  548               if (shift+bitsPerBand > DataBuffer.getDataTypeSize(dataType)) {
  549                   throw new IllegalArgumentException("bitsPerBand("+
  550                                                      bitsPerBand+") * bands is "+
  551                                                      " greater than data type "+
  552                                                      "size.");
  553               }
  554               switch(dataType) {
  555               case DataBuffer.TYPE_BYTE:
  556               case DataBuffer.TYPE_USHORT:
  557               case DataBuffer.TYPE_INT:
  558                   break;
  559               default:
  560                   throw new IllegalArgumentException("Unsupported data type " +
  561                                                       dataType);
  562               }
  563   
  564               for (int i = 0; i < bands; i++) {
  565                   masks[i] = mask << shift;
  566                   shift = shift - bitsPerBand;
  567               }
  568   
  569               return createPackedRaster(dataType, w, h, masks, location);
  570           }
  571           else {
  572               double fw = w;
  573               switch(dataType) {
  574               case DataBuffer.TYPE_BYTE:
  575                   d = new DataBufferByte((int)(Math.ceil(fw/(8/bitsPerBand)))*h);
  576                   break;
  577   
  578               case DataBuffer.TYPE_USHORT:
  579                   d = new DataBufferUShort((int)(Math.ceil(fw/(16/bitsPerBand)))*h);
  580                   break;
  581   
  582               case DataBuffer.TYPE_INT:
  583                   d = new DataBufferInt((int)(Math.ceil(fw/(32/bitsPerBand)))*h);
  584                   break;
  585   
  586               default:
  587                   throw new IllegalArgumentException("Unsupported data type " +
  588                                                      dataType);
  589               }
  590   
  591               return createPackedRaster(d, w, h, bitsPerBand, location);
  592           }
  593       }
  594   
  595       /**
  596        * Creates a Raster based on a PixelInterleavedSampleModel with the
  597        * specified DataBuffer, width, height, scanline stride, pixel
  598        * stride, and band offsets.  The number of bands is inferred from
  599        * bandOffsets.length.  The upper left corner of the Raster
  600        * is given by the location argument.  If location is null, (0, 0)
  601        * will be used.
  602        * <p> Note that interleaved <code>DataBuffer.TYPE_INT</code>
  603        * Rasters are not supported.  To create a 1-band Raster of type
  604        * <code>DataBuffer.TYPE_INT</code>, use
  605        * Raster.createPackedRaster().
  606        * @param dataBuffer the <code>DataBuffer</code> that contains the
  607        *        image data
  608        * @param w         the width in pixels of the image data
  609        * @param h         the height in pixels of the image data
  610        * @param scanlineStride the line stride of the image data
  611        * @param pixelStride the pixel stride of the image data
  612        * @param bandOffsets the offsets of all bands
  613        * @param location  the upper-left corner of the <code>Raster</code>
  614        * @return a WritableRaster object with the specified
  615        *         <code>DataBuffer</code>, width, height, scanline stride,
  616        *         pixel stride and band offsets.
  617        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  618        *         is less than or equal to zero, or computing either
  619        *         <code>location.x + w</code> or
  620        *         <code>location.y + h</code> results in integer
  621        *         overflow
  622        * @throws IllegalArgumentException if <code>dataType</code> is not
  623        *         one of the supported data types, which are
  624        *         <code>DataBuffer.TYPE_BYTE</code>,
  625        *         <code>DataBuffer.TYPE_USHORT</code>
  626        * @throws RasterFormatException if <code>dataBuffer</code> has more
  627        *         than one bank.
  628        * @throws NullPointerException if <code>dataBuffer</code> is null
  629        */
  630       public static WritableRaster createInterleavedRaster(DataBuffer dataBuffer,
  631                                                            int w, int h,
  632                                                            int scanlineStride,
  633                                                            int pixelStride,
  634                                                            int bandOffsets[],
  635                                                            Point location) {
  636           if (dataBuffer == null) {
  637               throw new NullPointerException("DataBuffer cannot be null");
  638           }
  639           if (location == null) {
  640               location = new Point(0, 0);
  641           }
  642           int dataType = dataBuffer.getDataType();
  643   
  644           PixelInterleavedSampleModel csm =
  645               new PixelInterleavedSampleModel(dataType, w, h,
  646                                               pixelStride,
  647                                               scanlineStride,
  648                                               bandOffsets);
  649           switch(dataType) {
  650           case DataBuffer.TYPE_BYTE:
  651               return new ByteInterleavedRaster(csm, dataBuffer, location);
  652   
  653           case DataBuffer.TYPE_USHORT:
  654               return new ShortInterleavedRaster(csm, dataBuffer, location);
  655   
  656           default:
  657               throw new IllegalArgumentException("Unsupported data type " +
  658                                                   dataType);
  659           }
  660       }
  661   
  662       /**
  663        * Creates a Raster based on a BandedSampleModel with the
  664        * specified DataBuffer, width, height, scanline stride, bank
  665        * indices, and band offsets.  The number of bands is inferred
  666        * from bankIndices.length and bandOffsets.length, which must be
  667        * the same.  The upper left corner of the Raster is given by the
  668        * location argument.  If location is null, (0, 0) will be used.
  669        * @param dataBuffer the <code>DataBuffer</code> that contains the
  670        *        image data
  671        * @param w         the width in pixels of the image data
  672        * @param h         the height in pixels of the image data
  673        * @param scanlineStride the line stride of the image data
  674        * @param bankIndices the bank indices for each band
  675        * @param bandOffsets the offsets of all bands
  676        * @param location  the upper-left corner of the <code>Raster</code>
  677        * @return a WritableRaster object with the specified
  678        *         <code>DataBuffer</code>, width, height, scanline stride,
  679        *         bank indices and band offsets.
  680        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  681        *         is less than or equal to zero, or computing either
  682        *         <code>location.x + w</code> or
  683        *         <code>location.y + h</code> results in integer
  684        *         overflow
  685        * @throws IllegalArgumentException if <code>dataType</code> is not
  686        *         one of the supported data types, which are
  687        *         <code>DataBuffer.TYPE_BYTE</code>,
  688        *         <code>DataBuffer.TYPE_USHORT</code>
  689        *         or <code>DataBuffer.TYPE_INT</code>
  690        * @throws NullPointerException if <code>dataBuffer</code> is null
  691        */
  692       public static WritableRaster createBandedRaster(DataBuffer dataBuffer,
  693                                                       int w, int h,
  694                                                       int scanlineStride,
  695                                                       int bankIndices[],
  696                                                       int bandOffsets[],
  697                                                       Point location) {
  698           if (dataBuffer == null) {
  699               throw new NullPointerException("DataBuffer cannot be null");
  700           }
  701           if (location == null) {
  702              location = new Point(0,0);
  703           }
  704           int dataType = dataBuffer.getDataType();
  705   
  706           int bands = bankIndices.length;
  707           if (bandOffsets.length != bands) {
  708               throw new IllegalArgumentException(
  709                                      "bankIndices.length != bandOffsets.length");
  710           }
  711   
  712           BandedSampleModel bsm =
  713               new BandedSampleModel(dataType, w, h,
  714                                     scanlineStride,
  715                                     bankIndices, bandOffsets);
  716   
  717           switch(dataType) {
  718           case DataBuffer.TYPE_BYTE:
  719               return new ByteBandedRaster(bsm, dataBuffer, location);
  720   
  721           case DataBuffer.TYPE_USHORT:
  722               return new ShortBandedRaster(bsm, dataBuffer, location);
  723   
  724           case DataBuffer.TYPE_INT:
  725               return new SunWritableRaster(bsm, dataBuffer, location);
  726   
  727           default:
  728               throw new IllegalArgumentException("Unsupported data type " +
  729                                                   dataType);
  730           }
  731       }
  732   
  733       /**
  734        * Creates a Raster based on a SinglePixelPackedSampleModel with
  735        * the specified DataBuffer, width, height, scanline stride, and
  736        * band masks.  The number of bands is inferred from bandMasks.length.
  737        * The upper left corner of the Raster is given by
  738        * the location argument.  If location is null, (0, 0) will be used.
  739        * @param dataBuffer the <code>DataBuffer</code> that contains the
  740        *        image data
  741        * @param w         the width in pixels of the image data
  742        * @param h         the height in pixels of the image data
  743        * @param scanlineStride the line stride of the image data
  744        * @param bandMasks an array containing an entry for each band
  745        * @param location  the upper-left corner of the <code>Raster</code>
  746        * @return a WritableRaster object with the specified
  747        *         <code>DataBuffer</code>, width, height, scanline stride,
  748        *         and band masks.
  749        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  750        *         is less than or equal to zero, or computing either
  751        *         <code>location.x + w</code> or
  752        *         <code>location.y + h</code> results in integer
  753        *         overflow
  754        * @throws IllegalArgumentException if <code>dataType</code> is not
  755        *         one of the supported data types, which are
  756        *         <code>DataBuffer.TYPE_BYTE</code>,
  757        *         <code>DataBuffer.TYPE_USHORT</code>
  758        *         or <code>DataBuffer.TYPE_INT</code>
  759        * @throws RasterFormatException if <code>dataBuffer</code> has more
  760        *         than one bank.
  761        * @throws NullPointerException if <code>dataBuffer</code> is null
  762        */
  763       public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
  764                                                       int w, int h,
  765                                                       int scanlineStride,
  766                                                       int bandMasks[],
  767                                                       Point location) {
  768           if (dataBuffer == null) {
  769               throw new NullPointerException("DataBuffer cannot be null");
  770           }
  771           if (location == null) {
  772              location = new Point(0,0);
  773           }
  774           int dataType = dataBuffer.getDataType();
  775   
  776           SinglePixelPackedSampleModel sppsm =
  777               new SinglePixelPackedSampleModel(dataType, w, h, scanlineStride,
  778                                                bandMasks);
  779   
  780           switch(dataType) {
  781           case DataBuffer.TYPE_BYTE:
  782               return new ByteInterleavedRaster(sppsm, dataBuffer, location);
  783   
  784           case DataBuffer.TYPE_USHORT:
  785               return new ShortInterleavedRaster(sppsm, dataBuffer, location);
  786   
  787           case DataBuffer.TYPE_INT:
  788               return new IntegerInterleavedRaster(sppsm, dataBuffer, location);
  789   
  790           default:
  791               throw new IllegalArgumentException("Unsupported data type " +
  792                                                   dataType);
  793           }
  794       }
  795   
  796       /**
  797        * Creates a Raster based on a MultiPixelPackedSampleModel with the
  798        * specified DataBuffer, width, height, and bits per pixel.  The upper
  799        * left corner of the Raster is given by the location argument.  If
  800        * location is null, (0, 0) will be used.
  801        * @param dataBuffer the <code>DataBuffer</code> that contains the
  802        *        image data
  803        * @param w         the width in pixels of the image data
  804        * @param h         the height in pixels of the image data
  805        * @param bitsPerPixel the number of bits for each pixel
  806        * @param location  the upper-left corner of the <code>Raster</code>
  807        * @return a WritableRaster object with the specified
  808        *         <code>DataBuffer</code>, width, height, and
  809        *         bits per pixel.
  810        * @throws RasterFormatException if <code>w</code> or <code>h</code>
  811        *         is less than or equal to zero, or computing either
  812        *         <code>location.x + w</code> or
  813        *         <code>location.y + h</code> results in integer
  814        *         overflow
  815        * @throws IllegalArgumentException if <code>dataType</code> is not
  816        *         one of the supported data types, which are
  817        *         <code>DataBuffer.TYPE_BYTE</code>,
  818        *         <code>DataBuffer.TYPE_USHORT</code>
  819        *         or <code>DataBuffer.TYPE_INT</code>
  820        * @throws RasterFormatException if <code>dataBuffer</code> has more
  821        *         than one bank.
  822        * @throws NullPointerException if <code>dataBuffer</code> is null
  823        */
  824       public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
  825                                                       int w, int h,
  826                                                       int bitsPerPixel,
  827                                                       Point location) {
  828           if (dataBuffer == null) {
  829               throw new NullPointerException("DataBuffer cannot be null");
  830           }
  831           if (location == null) {
  832              location = new Point(0,0);
  833           }
  834           int dataType = dataBuffer.getDataType();
  835   
  836           if (dataType != DataBuffer.TYPE_BYTE &&
  837               dataType != DataBuffer.TYPE_USHORT &&
  838               dataType != DataBuffer.TYPE_INT) {
  839               throw new IllegalArgumentException("Unsupported data type " +
  840                                                  dataType);
  841           }
  842   
  843           if (dataBuffer.getNumBanks() != 1) {
  844               throw new
  845                   RasterFormatException("DataBuffer for packed Rasters"+
  846                                         " must only have 1 bank.");
  847           }
  848   
  849           MultiPixelPackedSampleModel mppsm =
  850                   new MultiPixelPackedSampleModel(dataType, w, h, bitsPerPixel);
  851   
  852           if (dataType == DataBuffer.TYPE_BYTE &&
  853               (bitsPerPixel == 1 || bitsPerPixel == 2 || bitsPerPixel == 4)) {
  854               return new BytePackedRaster(mppsm, dataBuffer, location);
  855           } else {
  856               return new SunWritableRaster(mppsm, dataBuffer, location);
  857           }
  858       }
  859   
  860   
  861       /**
  862        *  Creates a Raster with the specified SampleModel and DataBuffer.
  863        *  The upper left corner of the Raster is given by the location argument.
  864        *  If location is null, (0, 0) will be used.
  865        *  @param sm the specified <code>SampleModel</code>
  866        *  @param db the specified <code>DataBuffer</code>
  867        *  @param location the upper-left corner of the <code>Raster</code>
  868        *  @return a <code>Raster</code> with the specified
  869        *          <code>SampleModel</code>, <code>DataBuffer</code>, and
  870        *          location.
  871        * @throws RasterFormatException if computing either
  872        *         <code>location.x + sm.getWidth()</code> or
  873        *         <code>location.y + sm.getHeight()</code> results in integer
  874        *         overflow
  875        * @throws RasterFormatException if <code>db</code> has more
  876        *         than one bank and <code>sm</code> is a
  877        *         PixelInterleavedSampleModel, SinglePixelPackedSampleModel,
  878        *         or MultiPixelPackedSampleModel.
  879        *  @throws NullPointerException if either SampleModel or DataBuffer is
  880        *          null
  881        */
  882       public static Raster createRaster(SampleModel sm,
  883                                         DataBuffer db,
  884                                         Point location) {
  885           if ((sm == null) || (db == null)) {
  886               throw new NullPointerException("SampleModel and DataBuffer cannot be null");
  887           }
  888   
  889           if (location == null) {
  890              location = new Point(0,0);
  891           }
  892           int dataType = sm.getDataType();
  893   
  894           if (sm instanceof PixelInterleavedSampleModel) {
  895               switch(dataType) {
  896                   case DataBuffer.TYPE_BYTE:
  897                       return new ByteInterleavedRaster(sm, db, location);
  898   
  899                   case DataBuffer.TYPE_USHORT:
  900                       return new ShortInterleavedRaster(sm, db, location);
  901               }
  902           } else if (sm instanceof SinglePixelPackedSampleModel) {
  903               switch(dataType) {
  904                   case DataBuffer.TYPE_BYTE:
  905                       return new ByteInterleavedRaster(sm, db, location);
  906   
  907                   case DataBuffer.TYPE_USHORT:
  908                       return new ShortInterleavedRaster(sm, db, location);
  909   
  910                   case DataBuffer.TYPE_INT:
  911                       return new IntegerInterleavedRaster(sm, db, location);
  912               }
  913           } else if (sm instanceof MultiPixelPackedSampleModel &&
  914                      dataType == DataBuffer.TYPE_BYTE &&
  915                      sm.getSampleSize(0) < 8) {
  916               return new BytePackedRaster(sm, db, location);
  917           }
  918   
  919           // we couldn't do anything special - do the generic thing
  920   
  921           return new Raster(sm,db,location);
  922       }
  923   
  924       /**
  925        *  Creates a WritableRaster with the specified SampleModel.
  926        *  The upper left corner of the Raster is given by the location argument.
  927        *  If location is null, (0, 0) will be used.
  928        *  @param sm the specified <code>SampleModel</code>
  929        *  @param location the upper-left corner of the
  930        *         <code>WritableRaster</code>
  931        *  @return a <code>WritableRaster</code> with the specified
  932        *          <code>SampleModel</code> and location.
  933        *  @throws RasterFormatException if computing either
  934        *          <code>location.x + sm.getWidth()</code> or
  935        *          <code>location.y + sm.getHeight()</code> results in integer
  936        *          overflow
  937        */
  938       public static WritableRaster createWritableRaster(SampleModel sm,
  939                                                         Point location) {
  940           if (location == null) {
  941              location = new Point(0,0);
  942           }
  943   
  944           return createWritableRaster(sm, sm.createDataBuffer(), location);
  945       }
  946   
  947       /**
  948        *  Creates a WritableRaster with the specified SampleModel and DataBuffer.
  949        *  The upper left corner of the Raster is given by the location argument.
  950        *  If location is null, (0, 0) will be used.
  951        *  @param sm the specified <code>SampleModel</code>
  952        *  @param db the specified <code>DataBuffer</code>
  953        *  @param location the upper-left corner of the
  954        *         <code>WritableRaster</code>
  955        *  @return a <code>WritableRaster</code> with the specified
  956        *          <code>SampleModel</code>, <code>DataBuffer</code>, and
  957        *          location.
  958        * @throws RasterFormatException if computing either
  959        *         <code>location.x + sm.getWidth()</code> or
  960        *         <code>location.y + sm.getHeight()</code> results in integer
  961        *         overflow
  962        * @throws RasterFormatException if <code>db</code> has more
  963        *         than one bank and <code>sm</code> is a
  964        *         PixelInterleavedSampleModel, SinglePixelPackedSampleModel,
  965        *         or MultiPixelPackedSampleModel.
  966        * @throws NullPointerException if either SampleModel or DataBuffer is null
  967        */
  968       public static WritableRaster createWritableRaster(SampleModel sm,
  969                                                         DataBuffer db,
  970                                                         Point location) {
  971           if ((sm == null) || (db == null)) {
  972               throw new NullPointerException("SampleModel and DataBuffer cannot be null");
  973           }
  974           if (location == null) {
  975              location = new Point(0,0);
  976           }
  977   
  978           int dataType = sm.getDataType();
  979   
  980           if (sm instanceof PixelInterleavedSampleModel) {
  981               switch(dataType) {
  982                   case DataBuffer.TYPE_BYTE:
  983                       return new ByteInterleavedRaster(sm, db, location);
  984   
  985                   case DataBuffer.TYPE_USHORT:
  986                       return new ShortInterleavedRaster(sm, db, location);
  987               }
  988           } else if (sm instanceof SinglePixelPackedSampleModel) {
  989               switch(dataType) {
  990                   case DataBuffer.TYPE_BYTE:
  991                       return new ByteInterleavedRaster(sm, db, location);
  992   
  993                   case DataBuffer.TYPE_USHORT:
  994                       return new ShortInterleavedRaster(sm, db, location);
  995   
  996                   case DataBuffer.TYPE_INT:
  997                       return new IntegerInterleavedRaster(sm, db, location);
  998               }
  999           } else if (sm instanceof MultiPixelPackedSampleModel &&
 1000                      dataType == DataBuffer.TYPE_BYTE &&
 1001                      sm.getSampleSize(0) < 8) {
 1002               return new BytePackedRaster(sm, db, location);
 1003           }
 1004   
 1005           // we couldn't do anything special - do the generic thing
 1006   
 1007           return new SunWritableRaster(sm,db,location);
 1008       }
 1009   
 1010       /**
 1011        *  Constructs a Raster with the given SampleModel.  The Raster's
 1012        *  upper left corner is origin and it is the same size as the
 1013        *  SampleModel.  A DataBuffer large enough to describe the
 1014        *  Raster is automatically created.
 1015        *  @param sampleModel     The SampleModel that specifies the layout
 1016        *  @param origin          The Point that specified the origin
 1017        *  @throws RasterFormatException if computing either
 1018        *          <code>origin.x + sampleModel.getWidth()</code> or
 1019        *          <code>origin.y + sampleModel.getHeight()</code> results in
 1020        *          integer overflow
 1021        *  @throws NullPointerException either <code>sampleModel</code> or
 1022        *          <code>origin</code> is null
 1023        */
 1024       protected Raster(SampleModel sampleModel,
 1025                        Point origin) {
 1026           this(sampleModel,
 1027                sampleModel.createDataBuffer(),
 1028                new Rectangle(origin.x,
 1029                              origin.y,
 1030                              sampleModel.getWidth(),
 1031                              sampleModel.getHeight()),
 1032                origin,
 1033                null);
 1034       }
 1035   
 1036       /**
 1037        *  Constructs a Raster with the given SampleModel and DataBuffer.
 1038        *  The Raster's upper left corner is origin and it is the same size
 1039        *  as the SampleModel.  The DataBuffer is not initialized and must
 1040        *  be compatible with SampleModel.
 1041        *  @param sampleModel     The SampleModel that specifies the layout
 1042        *  @param dataBuffer      The DataBuffer that contains the image data
 1043        *  @param origin          The Point that specifies the origin
 1044        *  @throws RasterFormatException if computing either
 1045        *          <code>origin.x + sampleModel.getWidth()</code> or
 1046        *          <code>origin.y + sampleModel.getHeight()</code> results in
 1047        *          integer overflow
 1048        *  @throws NullPointerException either <code>sampleModel</code> or
 1049        *          <code>origin</code> is null
 1050        */
 1051       protected Raster(SampleModel sampleModel,
 1052                        DataBuffer dataBuffer,
 1053                        Point origin) {
 1054           this(sampleModel,
 1055                dataBuffer,
 1056                new Rectangle(origin.x,
 1057                              origin.y,
 1058                              sampleModel.getWidth(),
 1059                              sampleModel.getHeight()),
 1060                origin,
 1061                null);
 1062       }
 1063   
 1064       /**
 1065        * Constructs a Raster with the given SampleModel, DataBuffer, and
 1066        * parent.  aRegion specifies the bounding rectangle of the new
 1067        * Raster.  When translated into the base Raster's coordinate
 1068        * system, aRegion must be contained by the base Raster.
 1069        * (The base Raster is the Raster's ancestor which has no parent.)
 1070        * sampleModelTranslate specifies the sampleModelTranslateX and
 1071        * sampleModelTranslateY values of the new Raster.
 1072        *
 1073        * Note that this constructor should generally be called by other
 1074        * constructors or create methods, it should not be used directly.
 1075        * @param sampleModel     The SampleModel that specifies the layout
 1076        * @param dataBuffer      The DataBuffer that contains the image data
 1077        * @param aRegion         The Rectangle that specifies the image area
 1078        * @param sampleModelTranslate  The Point that specifies the translation
 1079        *                        from SampleModel to Raster coordinates
 1080        * @param parent          The parent (if any) of this raster
 1081        * @throws NullPointerException if any of <code>sampleModel</code>,
 1082        *         <code>dataBuffer</code>, <code>aRegion</code> or
 1083        *         <code>sampleModelTranslate</code> is null
 1084        * @throws RasterFormatException if <code>aRegion</code> has width
 1085        *         or height less than or equal to zero, or computing either
 1086        *         <code>aRegion.x + aRegion.width</code> or
 1087        *         <code>aRegion.y + aRegion.height</code> results in integer
 1088        *         overflow
 1089        */
 1090       protected Raster(SampleModel sampleModel,
 1091                        DataBuffer dataBuffer,
 1092                        Rectangle aRegion,
 1093                        Point sampleModelTranslate,
 1094                        Raster parent) {
 1095   
 1096           if ((sampleModel == null) || (dataBuffer == null) ||
 1097               (aRegion == null) || (sampleModelTranslate == null)) {
 1098               throw new NullPointerException("SampleModel, dataBuffer, aRegion and " +
 1099                                              "sampleModelTranslate cannot be null");
 1100           }
 1101          this.sampleModel = sampleModel;
 1102          this.dataBuffer = dataBuffer;
 1103          minX = aRegion.x;
 1104          minY = aRegion.y;
 1105          width = aRegion.width;
 1106          height = aRegion.height;
 1107          if (width <= 0 || height <= 0) {
 1108              throw new RasterFormatException("negative or zero " +
 1109                  ((width <= 0) ? "width" : "height"));
 1110          }
 1111          if ((minX + width) < minX) {
 1112              throw new RasterFormatException(
 1113                  "overflow condition for X coordinates of Raster");
 1114          }
 1115          if ((minY + height) < minY) {
 1116              throw new RasterFormatException(
 1117                  "overflow condition for Y coordinates of Raster");
 1118          }
 1119   
 1120          sampleModelTranslateX = sampleModelTranslate.x;
 1121          sampleModelTranslateY = sampleModelTranslate.y;
 1122   
 1123          numBands = sampleModel.getNumBands();
 1124          numDataElements = sampleModel.getNumDataElements();
 1125          this.parent = parent;
 1126       }
 1127   
 1128   
 1129       /**
 1130        * Returns the parent Raster (if any) of this Raster or null.
 1131        * @return the parent Raster or <code>null</code>.
 1132        */
 1133       public Raster getParent() {
 1134           return parent;
 1135       }
 1136   
 1137       /**
 1138        * Returns the X translation from the coordinate system of the
 1139        * SampleModel to that of the Raster.  To convert a pixel's X
 1140        * coordinate from the Raster coordinate system to the SampleModel
 1141        * coordinate system, this value must be subtracted.
 1142        * @return the X translation from the coordinate space of the
 1143        *         Raster's SampleModel to that of the Raster.
 1144        */
 1145       final public int getSampleModelTranslateX() {
 1146           return sampleModelTranslateX;
 1147       }
 1148   
 1149       /**
 1150        * Returns the Y translation from the coordinate system of the
 1151        * SampleModel to that of the Raster.  To convert a pixel's Y
 1152        * coordinate from the Raster coordinate system to the SampleModel
 1153        * coordinate system, this value must be subtracted.
 1154        * @return the Y translation from the coordinate space of the
 1155        *         Raster's SampleModel to that of the Raster.
 1156        */
 1157       final public int getSampleModelTranslateY() {
 1158           return sampleModelTranslateY;
 1159       }
 1160   
 1161       /**
 1162        * Create a compatible WritableRaster the same size as this Raster with
 1163        * the same SampleModel and a new initialized DataBuffer.
 1164        * @return a compatible <code>WritableRaster</code> with the same sample
 1165        *         model and a new data buffer.
 1166        */
 1167       public WritableRaster createCompatibleWritableRaster() {
 1168           return new SunWritableRaster(sampleModel, new Point(0,0));
 1169       }
 1170   
 1171       /**
 1172        * Create a compatible WritableRaster with the specified size, a new
 1173        * SampleModel, and a new initialized DataBuffer.
 1174        * @param w the specified width of the new <code>WritableRaster</code>
 1175        * @param h the specified height of the new <code>WritableRaster</code>
 1176        * @return a compatible <code>WritableRaster</code> with the specified
 1177        *         size and a new sample model and data buffer.
 1178        * @exception RasterFormatException if the width or height is less than
 1179        *                               or equal to zero.
 1180        */
 1181       public WritableRaster createCompatibleWritableRaster(int w, int h) {
 1182           if (w <= 0 || h <=0) {
 1183               throw new RasterFormatException("negative " +
 1184                                             ((w <= 0) ? "width" : "height"));
 1185           }
 1186   
 1187           SampleModel sm = sampleModel.createCompatibleSampleModel(w,h);
 1188   
 1189           return new SunWritableRaster(sm, new Point(0,0));
 1190       }
 1191   
 1192       /**
 1193        * Create a compatible WritableRaster with location (minX, minY)
 1194        * and size (width, height) specified by rect, a
 1195        * new SampleModel, and a new initialized DataBuffer.
 1196        * @param rect a <code>Rectangle</code> that specifies the size and
 1197        *        location of the <code>WritableRaster</code>
 1198        * @return a compatible <code>WritableRaster</code> with the specified
 1199        *         size and location and a new sample model and data buffer.
 1200        * @throws RasterFormatException if <code>rect</code> has width
 1201        *         or height less than or equal to zero, or computing either
 1202        *         <code>rect.x + rect.width</code> or
 1203        *         <code>rect.y + rect.height</code> results in integer
 1204        *         overflow
 1205        * @throws NullPointerException if <code>rect</code> is null
 1206        */
 1207       public WritableRaster createCompatibleWritableRaster(Rectangle rect) {
 1208           if (rect == null) {
 1209               throw new NullPointerException("Rect cannot be null");
 1210           }
 1211           return createCompatibleWritableRaster(rect.x, rect.y,
 1212                                                 rect.width, rect.height);
 1213       }
 1214   
 1215       /**
 1216        * Create a compatible WritableRaster with the specified
 1217        * location (minX, minY) and size (width, height), a
 1218        * new SampleModel, and a new initialized DataBuffer.
 1219        * @param x the X coordinate of the upper-left corner of
 1220        *        the <code>WritableRaster</code>
 1221        * @param y the Y coordinate of the upper-left corner of
 1222        *        the <code>WritableRaster</code>
 1223        * @param w the specified width of the <code>WritableRaster</code>
 1224        * @param h the specified height of the <code>WritableRaster</code>
 1225        * @return a compatible <code>WritableRaster</code> with the specified
 1226        *         size and location and a new sample model and data buffer.
 1227        * @throws RasterFormatException if <code>w</code> or <code>h</code>
 1228        *         is less than or equal to zero, or computing either
 1229        *         <code>x + w</code> or
 1230        *         <code>y + h</code> results in integer
 1231        *         overflow
 1232        */
 1233       public WritableRaster createCompatibleWritableRaster(int x, int y,
 1234                                                            int w, int h) {
 1235           WritableRaster ret = createCompatibleWritableRaster(w, h);
 1236           return ret.createWritableChild(0,0,w,h,x,y,null);
 1237       }
 1238   
 1239       /**
 1240        * Create a Raster with the same size, SampleModel and DataBuffer
 1241        * as this one, but with a different location.  The new Raster
 1242        * will possess a reference to the current Raster, accessible
 1243        * through its getParent() method.
 1244        *
 1245        * @param childMinX the X coordinate of the upper-left
 1246        *        corner of the new <code>Raster</code>
 1247        * @param childMinY the Y coordinate of the upper-left
 1248        *        corner of the new <code>Raster</code>
 1249        * @return a new <code>Raster</code> with the same size, SampleModel,
 1250        *         and DataBuffer as this <code>Raster</code>, but with the
 1251        *         specified location.
 1252        * @throws RasterFormatException if  computing either
 1253        *         <code>childMinX + this.getWidth()</code> or
 1254        *         <code>childMinY + this.getHeight()</code> results in integer
 1255        *         overflow
 1256        */
 1257       public Raster createTranslatedChild(int childMinX, int childMinY) {
 1258           return createChild(minX,minY,width,height,
 1259                              childMinX,childMinY,null);
 1260       }
 1261   
 1262       /**
 1263        * Returns a new Raster which shares all or part of this Raster's
 1264        * DataBuffer.  The new Raster will possess a reference to the
 1265        * current Raster, accessible through its getParent() method.
 1266        *
 1267        * <p> The parentX, parentY, width and height parameters
 1268        * form a Rectangle in this Raster's coordinate space,
 1269        * indicating the area of pixels to be shared.  An error will
 1270        * be thrown if this Rectangle is not contained with the bounds
 1271        * of the current Raster.
 1272        *
 1273        * <p> The new Raster may additionally be translated to a
 1274        * different coordinate system for the plane than that used by the current
 1275        * Raster.  The childMinX and childMinY parameters give the new
 1276        * (x, y) coordinate of the upper-left pixel of the returned
 1277        * Raster; the coordinate (childMinX, childMinY) in the new Raster
 1278        * will map to the same pixel as the coordinate (parentX, parentY)
 1279        * in the current Raster.
 1280        *
 1281        * <p> The new Raster may be defined to contain only a subset of
 1282        * the bands of the current Raster, possibly reordered, by means
 1283        * of the bandList parameter.  If bandList is null, it is taken to
 1284        * include all of the bands of the current Raster in their current
 1285        * order.
 1286        *
 1287        * <p> To create a new Raster that contains a subregion of the current
 1288        * Raster, but shares its coordinate system and bands,
 1289        * this method should be called with childMinX equal to parentX,
 1290        * childMinY equal to parentY, and bandList equal to null.
 1291        *
 1292        * @param parentX The X coordinate of the upper-left corner
 1293        *        in this Raster's coordinates
 1294        * @param parentY The Y coordinate of the upper-left corner
 1295        *        in this Raster's coordinates
 1296        * @param width      Width of the region starting at (parentX, parentY)
 1297        * @param height     Height of the region starting at (parentX, parentY).
 1298        * @param childMinX The X coordinate of the upper-left corner
 1299        *                   of the returned Raster
 1300        * @param childMinY The Y coordinate of the upper-left corner
 1301        *                   of the returned Raster
 1302        * @param bandList   Array of band indices, or null to use all bands
 1303        * @return a new <code>Raster</code>.
 1304        * @exception RasterFormatException if the specified subregion is outside
 1305        *                               of the raster bounds.
 1306        * @throws RasterFormatException if <code>width</code> or
 1307        *         <code>height</code>
 1308        *         is less than or equal to zero, or computing any of
 1309        *         <code>parentX + width</code>, <code>parentY + height</code>,
 1310        *         <code>childMinX + width</code>, or
 1311        *         <code>childMinY + height</code> results in integer
 1312        *         overflow
 1313        */
 1314       public Raster createChild(int parentX, int parentY,
 1315                                 int width, int height,
 1316                                 int childMinX, int childMinY,
 1317                                 int bandList[]) {
 1318           if (parentX < this.minX) {
 1319               throw new RasterFormatException("parentX lies outside raster");
 1320           }
 1321           if (parentY < this.minY) {
 1322               throw new RasterFormatException("parentY lies outside raster");
 1323           }
 1324           if ((parentX + width < parentX) ||
 1325               (parentX + width > this.width + this.minX)) {
 1326               throw new RasterFormatException("(parentX + width) is outside raster");
 1327           }
 1328           if ((parentY + height < parentY) ||
 1329               (parentY + height > this.height + this.minY)) {
 1330               throw new RasterFormatException("(parentY + height) is outside raster");
 1331           }
 1332   
 1333           SampleModel subSampleModel;
 1334           // Note: the SampleModel for the child Raster should have the same
 1335           // width and height as that for the parent, since it represents
 1336           // the physical layout of the pixel data.  The child Raster's width
 1337           // and height represent a "virtual" view of the pixel data, so
 1338           // they may be different than those of the SampleModel.
 1339           if (bandList == null) {
 1340               subSampleModel = sampleModel;
 1341           } else {
 1342               subSampleModel = sampleModel.createSubsetSampleModel(bandList);
 1343           }
 1344   
 1345           int deltaX = childMinX - parentX;
 1346           int deltaY = childMinY - parentY;
 1347   
 1348           return new Raster(subSampleModel, getDataBuffer(),
 1349                             new Rectangle(childMinX, childMinY, width, height),
 1350                             new Point(sampleModelTranslateX + deltaX,
 1351                                       sampleModelTranslateY + deltaY), this);
 1352       }
 1353   
 1354       /**
 1355        * Returns the bounding Rectangle of this Raster. This function returns
 1356        * the same information as getMinX/MinY/Width/Height.
 1357        * @return the bounding box of this <code>Raster</code>.
 1358        */
 1359       public Rectangle getBounds() {
 1360           return new Rectangle(minX, minY, width, height);
 1361       }
 1362   
 1363       /** Returns the minimum valid X coordinate of the Raster.
 1364        *  @return the minimum x coordinate of this <code>Raster</code>.
 1365        */
 1366       final public int getMinX() {
 1367           return minX;
 1368       }
 1369   
 1370       /** Returns the minimum valid Y coordinate of the Raster.
 1371        *  @return the minimum y coordinate of this <code>Raster</code>.
 1372        */
 1373       final public int getMinY() {
 1374           return minY;
 1375       }
 1376   
 1377       /** Returns the width in pixels of the Raster.
 1378        *  @return the width of this <code>Raster</code>.
 1379        */
 1380       final public int getWidth() {
 1381           return width;
 1382       }
 1383   
 1384       /** Returns the height in pixels of the Raster.
 1385        *  @return the height of this <code>Raster</code>.
 1386        */
 1387       final public int getHeight() {
 1388           return height;
 1389       }
 1390   
 1391       /** Returns the number of bands (samples per pixel) in this Raster.
 1392        *  @return the number of bands of this <code>Raster</code>.
 1393        */
 1394       final public int getNumBands() {
 1395           return numBands;
 1396       }
 1397   
 1398       /**
 1399        *  Returns the number of data elements needed to transfer one pixel
 1400        *  via the getDataElements and setDataElements methods.  When pixels
 1401        *  are transferred via these methods, they may be transferred in a
 1402        *  packed or unpacked format, depending on the implementation of the
 1403        *  underlying SampleModel.  Using these methods, pixels are transferred
 1404        *  as an array of getNumDataElements() elements of a primitive type given
 1405        *  by getTransferType().  The TransferType may or may not be the same
 1406        *  as the storage data type of the DataBuffer.
 1407        *  @return the number of data elements.
 1408        */
 1409       final public int getNumDataElements() {
 1410           return sampleModel.getNumDataElements();
 1411       }
 1412   
 1413       /**
 1414        *  Returns the TransferType used to transfer pixels via the
 1415        *  getDataElements and setDataElements methods.  When pixels
 1416        *  are transferred via these methods, they may be transferred in a
 1417        *  packed or unpacked format, depending on the implementation of the
 1418        *  underlying SampleModel.  Using these methods, pixels are transferred
 1419        *  as an array of getNumDataElements() elements of a primitive type given
 1420        *  by getTransferType().  The TransferType may or may not be the same
 1421        *  as the storage data type of the DataBuffer.  The TransferType will
 1422        *  be one of the types defined in DataBuffer.
 1423        *  @return this transfer type.
 1424        */
 1425       final public int getTransferType() {
 1426           return sampleModel.getTransferType();
 1427       }
 1428   
 1429       /** Returns the DataBuffer associated with this Raster.
 1430        *  @return the <code>DataBuffer</code> of this <code>Raster</code>.
 1431        */
 1432       public DataBuffer getDataBuffer() {
 1433           return dataBuffer;
 1434       }
 1435   
 1436       /** Returns the SampleModel that describes the layout of the image data.
 1437        *  @return the <code>SampleModel</code> of this <code>Raster</code>.
 1438        */
 1439       public SampleModel getSampleModel() {
 1440           return sampleModel;
 1441       }
 1442   
 1443       /**
 1444        * Returns data for a single pixel in a primitive array of type
 1445        * TransferType.  For image data supported by the Java 2D(tm) API,
 1446        * this will be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
 1447        * DataBuffer.TYPE_INT, DataBuffer.TYPE_SHORT, DataBuffer.TYPE_FLOAT,
 1448        * or DataBuffer.TYPE_DOUBLE.  Data may be returned in a packed format,
 1449        * thus increasing efficiency for data transfers.
 1450        * An ArrayIndexOutOfBoundsException may be thrown
 1451        * if the coordinates are not in bounds.  However, explicit bounds
 1452        * checking is not guaranteed.
 1453        * A ClassCastException will be thrown if the input object is non null
 1454        * and references anything other than an array of TransferType.
 1455        * @see java.awt.image.SampleModel#getDataElements(int, int, Object, DataBuffer)
 1456        * @param x        The X coordinate of the pixel location
 1457        * @param y        The Y coordinate of the pixel location
 1458        * @param outData  An object reference to an array of type defined by
 1459        *                 getTransferType() and length getNumDataElements().
 1460        *                 If null, an array of appropriate type and size will be
 1461        *                 allocated
 1462        * @return         An object reference to an array of type defined by
 1463        *                 getTransferType() with the requested pixel data.
 1464        *
 1465        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1466        * in bounds, or if outData is too small to hold the output.
 1467        */
 1468       public Object getDataElements(int x, int y, Object outData) {
 1469           return sampleModel.getDataElements(x - sampleModelTranslateX,
 1470                                              y - sampleModelTranslateY,
 1471                                              outData, dataBuffer);
 1472       }
 1473   
 1474       /**
 1475        * Returns the pixel data for the specified rectangle of pixels in a
 1476        * primitive array of type TransferType.
 1477        * For image data supported by the Java 2D API, this
 1478        * will be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
 1479        * DataBuffer.TYPE_INT, DataBuffer.TYPE_SHORT, DataBuffer.TYPE_FLOAT,
 1480        * or DataBuffer.TYPE_DOUBLE.  Data may be returned in a packed format,
 1481        * thus increasing efficiency for data transfers.
 1482        * An ArrayIndexOutOfBoundsException may be thrown
 1483        * if the coordinates are not in bounds.  However, explicit bounds
 1484        * checking is not guaranteed.
 1485        * A ClassCastException will be thrown if the input object is non null
 1486        * and references anything other than an array of TransferType.
 1487        * @see java.awt.image.SampleModel#getDataElements(int, int, int, int, Object, DataBuffer)
 1488        * @param x    The X coordinate of the upper-left pixel location
 1489        * @param y    The Y coordinate of the upper-left pixel location
 1490        * @param w    Width of the pixel rectangle
 1491        * @param h   Height of the pixel rectangle
 1492        * @param outData  An object reference to an array of type defined by
 1493        *                 getTransferType() and length w*h*getNumDataElements().
 1494        *                 If null, an array of appropriate type and size will be
 1495        *                 allocated.
 1496        * @return         An object reference to an array of type defined by
 1497        *                 getTransferType() with the requested pixel data.
 1498        *
 1499        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1500        * in bounds, or if outData is too small to hold the output.
 1501        */
 1502       public Object getDataElements(int x, int y, int w, int h, Object outData) {
 1503           return sampleModel.getDataElements(x - sampleModelTranslateX,
 1504                                              y - sampleModelTranslateY,
 1505                                              w, h, outData, dataBuffer);
 1506       }
 1507   
 1508       /**
 1509        * Returns the samples in an array of int for the specified pixel.
 1510        * An ArrayIndexOutOfBoundsException may be thrown
 1511        * if the coordinates are not in bounds.  However, explicit bounds
 1512        * checking is not guaranteed.
 1513        * @param x The X coordinate of the pixel location
 1514        * @param y The Y coordinate of the pixel location
 1515        * @param iArray An optionally preallocated int array
 1516        * @return the samples for the specified pixel.
 1517        *
 1518        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1519        * in bounds, or if iArray is too small to hold the output.
 1520        */
 1521       public int[] getPixel(int x, int y, int iArray[]) {
 1522           return sampleModel.getPixel(x - sampleModelTranslateX,
 1523                                       y - sampleModelTranslateY,
 1524                                       iArray, dataBuffer);
 1525       }
 1526   
 1527       /**
 1528        * Returns the samples in an array of float for the
 1529        * specified pixel.
 1530        * An ArrayIndexOutOfBoundsException may be thrown
 1531        * if the coordinates are not in bounds.  However, explicit bounds
 1532        * checking is not guaranteed.
 1533        * @param x The X coordinate of the pixel location
 1534        * @param y The Y coordinate of the pixel location
 1535        * @param fArray An optionally preallocated float array
 1536        * @return the samples for the specified pixel.
 1537        *
 1538        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1539        * in bounds, or if fArray is too small to hold the output.
 1540        */
 1541       public float[] getPixel(int x, int y, float fArray[]) {
 1542           return sampleModel.getPixel(x - sampleModelTranslateX,
 1543                                       y - sampleModelTranslateY,
 1544                                       fArray, dataBuffer);
 1545       }
 1546   
 1547       /**
 1548        * Returns the samples in an array of double for the specified pixel.
 1549        * An ArrayIndexOutOfBoundsException may be thrown
 1550        * if the coordinates are not in bounds.  However, explicit bounds
 1551        * checking is not guaranteed.
 1552        * @param x The X coordinate of the pixel location
 1553        * @param y The Y coordinate of the pixel location
 1554        * @param dArray An optionally preallocated double array
 1555        * @return the samples for the specified pixel.
 1556        *
 1557        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1558        * in bounds, or if dArray is too small to hold the output.
 1559        */
 1560       public double[] getPixel(int x, int y, double dArray[]) {
 1561           return sampleModel.getPixel(x - sampleModelTranslateX,
 1562                                       y - sampleModelTranslateY,
 1563                                       dArray, dataBuffer);
 1564       }
 1565   
 1566       /**
 1567        * Returns an int array containing all samples for a rectangle of pixels,
 1568        * one sample per array element.
 1569        * An ArrayIndexOutOfBoundsException may be thrown
 1570        * if the coordinates are not in bounds.  However, explicit bounds
 1571        * checking is not guaranteed.
 1572        * @param x      The X coordinate of the upper-left pixel location
 1573        * @param y      The Y coordinate of the upper-left pixel location
 1574        * @param w      Width of the pixel rectangle
 1575        * @param h      Height of the pixel rectangle
 1576        * @param iArray An optionally pre-allocated int array
 1577        * @return the samples for the specified rectangle of pixels.
 1578        *
 1579        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1580        * in bounds, or if iArray is too small to hold the output.
 1581        */
 1582       public int[] getPixels(int x, int y, int w, int h, int iArray[]) {
 1583           return sampleModel.getPixels(x - sampleModelTranslateX,
 1584                                        y - sampleModelTranslateY, w, h,
 1585                                        iArray, dataBuffer);
 1586       }
 1587   
 1588       /**
 1589        * Returns a float array containing all samples for a rectangle of pixels,
 1590        * one sample per array element.
 1591        * An ArrayIndexOutOfBoundsException may be thrown
 1592        * if the coordinates are not in bounds.  However, explicit bounds
 1593        * checking is not guaranteed.
 1594        * @param x        The X coordinate of the pixel location
 1595        * @param y        The Y coordinate of the pixel location
 1596        * @param w        Width of the pixel rectangle
 1597        * @param h        Height of the pixel rectangle
 1598        * @param fArray   An optionally pre-allocated float array
 1599        * @return the samples for the specified rectangle of pixels.
 1600        *
 1601        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1602        * in bounds, or if fArray is too small to hold the output.
 1603        */
 1604       public float[] getPixels(int x, int y, int w, int h,
 1605                                float fArray[]) {
 1606           return sampleModel.getPixels(x - sampleModelTranslateX,
 1607                                        y - sampleModelTranslateY, w, h,
 1608                                        fArray, dataBuffer);
 1609       }
 1610   
 1611       /**
 1612        * Returns a double array containing all samples for a rectangle of pixels,
 1613        * one sample per array element.
 1614        * An ArrayIndexOutOfBoundsException may be thrown
 1615        * if the coordinates are not in bounds.  However, explicit bounds
 1616        * checking is not guaranteed.
 1617        * @param x        The X coordinate of the upper-left pixel location
 1618        * @param y        The Y coordinate of the upper-left pixel location
 1619        * @param w        Width of the pixel rectangle
 1620        * @param h        Height of the pixel rectangle
 1621        * @param dArray   An optionally pre-allocated double array
 1622        * @return the samples for the specified rectangle of pixels.
 1623        *
 1624        * @throws ArrayIndexOutOfBoundsException if the coordinates are not
 1625        * in bounds, or if dArray is too small to hold the output.
 1626        */
 1627       public double[] getPixels(int x, int y, int w, int h,
 1628                                 double dArray[]) {
 1629           return sampleModel.getPixels(x - sampleModelTranslateX,
 1630                                        y - sampleModelTranslateY,
 1631                                        w, h, dArray, dataBuffer);
 1632       }
 1633   
 1634   
 1635       /**
 1636        * Returns the sample in a specified band for the pixel located
 1637        * at (x,y) as an int.
 1638        * An ArrayIndexOutOfBoundsException may be thrown
 1639        * if the coordinates are not in bounds.  However, explicit bounds
 1640        * checking is not guaranteed.
 1641        * @param x        The X coordinate of the pixel location
 1642        * @param y        The Y coordinate of the pixel location
 1643        * @param b        The band to return
 1644        * @return the sample in the specified band for the pixel at the
 1645        *         specified coordinate.
 1646        *
 1647        * @throws ArrayIndexOutOfBoundsException if the coordinates or
 1648        * the band index are not in bounds.
 1649        */
 1650       public int getSample(int x, int y, int b) {
 1651           return sampleModel.getSample(x - sampleModelTranslateX,
 1652                                        y - sampleModelTranslateY, b,
 1653                                        dataBuffer);
 1654       }
 1655   
 1656       /**
 1657        * Returns the sample in a specified band
 1658        * for the pixel located at (x,y) as a float.
 1659        * An ArrayIndexOutOfBoundsException may be thrown
 1660        * if the coordinates are not in bounds.  However, explicit bounds
 1661        * checking is not guaranteed.
 1662        * @param x        The X coordinate of the pixel location
 1663        * @param y        The Y coordinate of the pixel location
 1664        * @param b        The band to return
 1665        * @return the sample in the specified band for the pixel at the
 1666        *         specified coordinate.
 1667        *
 1668        * @throws ArrayIndexOutOfBoundsException if the coordinates or
 1669        * the band index are not in bounds.
 1670        */
 1671       public float getSampleFloat(int x, int y, int b) {
 1672           return sampleModel.getSampleFloat(x - sampleModelTranslateX,
 1673                                             y - sampleModelTranslateY, b,
 1674                                             dataBuffer);
 1675       }
 1676   
 1677       /**
 1678        * Returns the sample in a specified band
 1679        * for a pixel located at (x,y) as a double.
 1680        * An ArrayIndexOutOfBoundsException may be thrown
 1681        * if the coordinates are not in bounds.  However, explicit bounds
 1682        * checking is not guaranteed.
 1683        * @param x        The X coordinate of the pixel location
 1684        * @param y        The Y coordinate of the pixel location
 1685        * @param b        The band to return
 1686        * @return the sample in the specified band for the pixel at the
 1687        *         specified coordinate.
 1688        *
 1689        * @throws ArrayIndexOutOfBoundsException if the coordinates or
 1690        * the band index are not in bounds.
 1691        */
 1692       public double getSampleDouble(int x, int y, int b) {
 1693           return sampleModel.getSampleDouble(x - sampleModelTranslateX,
 1694                                              y - sampleModelTranslateY,
 1695                                              b, dataBuffer);
 1696       }
 1697   
 1698       /**
 1699        * Returns the samples for a specified band for the specified rectangle
 1700        * of pixels in an int array, one sample per array element.
 1701        * An ArrayIndexOutOfBoundsException may be thrown
 1702        * if the coordinates are not in bounds.  However, explicit bounds
 1703        * checking is not guaranteed.
 1704        * @param x        The X coordinate of the upper-left pixel location
 1705        * @param y        The Y coordinate of the upper-left pixel location
 1706        * @param w        Width of the pixel rectangle
 1707        * @param h        Height of the pixel rectangle
 1708        * @param b        The band to return
 1709        * @param iArray   An optionally pre-allocated int array
 1710        * @return the samples for the specified band for the specified
 1711        *         rectangle of pixels.
 1712        *
 1713        * @throws ArrayIndexOutOfBoundsException if the coordinates or
 1714        * the band index are not in bounds, or if iArray is too small to
 1715        * hold the output.
 1716        */
 1717       public int[] getSamples(int x, int y, int w, int h, int b,
 1718                               int iArray[]) {
 1719           return sampleModel.getSamples(x - sampleModelTranslateX,
 1720                                         y - sampleModelTranslateY,
 1721                                         w, h, b, iArray,
 1722                                         dataBuffer);
 1723       }
 1724   
 1725       /**
 1726        * Returns the samples for a specified band for the specified rectangle
 1727        * of pixels in a float array, one sample per array element.
 1728        * An ArrayIndexOutOfBoundsException may be thrown
 1729        * if the coordinates are not in bounds.  However, explicit bounds
 1730        * checking is not guaranteed.
 1731        * @param x        The X coordinate of the upper-left pixel location
 1732        * @param y        The Y coordinate of the upper-left pixel location
 1733        * @param w        Width of the pixel rectangle
 1734        * @param h        Height of the pixel rectangle
 1735        * @param b        The band to return
 1736        * @param fArray   An optionally pre-allocated float array
 1737        * @return the samples for the specified band for the specified
 1738        *         rectangle of pixels.
 1739        *
 1740        * @throws ArrayIndexOutOfBoundsException if the coordinates or
 1741        * the band index are not in bounds, or if fArray is too small to
 1742        * hold the output.
 1743        */
 1744       public float[] getSamples(int x, int y, int w, int h, int b,
 1745                                 float fArray[]) {
 1746           return sampleModel.getSamples(x - sampleModelTranslateX,
 1747                                         y - sampleModelTranslateY,
 1748                                         w, h, b, fArray, dataBuffer);
 1749       }
 1750   
 1751       /**
 1752        * Returns the samples for a specified band for a specified rectangle
 1753        * of pixels in a double array, one sample per array element.
 1754        * An ArrayIndexOutOfBoundsException may be thrown
 1755        * if the coordinates are not in bounds.  However, explicit bounds
 1756        * checking is not guaranteed.
 1757        * @param x        The X coordinate of the upper-left pixel location
 1758        * @param y        The Y coordinate of the upper-left pixel location
 1759        * @param w        Width of the pixel rectangle
 1760        * @param h        Height of the pixel rectangle
 1761        * @param b        The band to return
 1762        * @param dArray   An optionally pre-allocated double array
 1763        * @return the samples for the specified band for the specified
 1764        *         rectangle of pixels.
 1765        *
 1766        * @throws ArrayIndexOutOfBoundsException if the coordinates or
 1767        * the band index are not in bounds, or if dArray is too small to
 1768        * hold the output.
 1769        */
 1770       public double[] getSamples(int x, int y, int w, int h, int b,
 1771                                  double dArray[]) {
 1772            return sampleModel.getSamples(x - sampleModelTranslateX,
 1773                                          y - sampleModelTranslateY,
 1774                                          w, h, b, dArray, dataBuffer);
 1775       }
 1776   
 1777   }

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