1 /*
   2  * Copyright (c) 1998, 2014, 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
   6  * under the terms of the GNU General Public License version 2 only, as
   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
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  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
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.awt.image;
  27 import java.awt.image.Raster;
  28 import java.awt.image.WritableRaster;
  29 import java.awt.image.RasterFormatException;
  30 import java.awt.image.SampleModel;
  31 import java.awt.image.ComponentSampleModel;
  32 import java.awt.image.PixelInterleavedSampleModel;
  33 import java.awt.image.SinglePixelPackedSampleModel;
  34 import java.awt.image.DataBuffer;
  35 import java.awt.image.DataBufferUShort;
  36 import java.awt.Rectangle;
  37 import java.awt.Point;
  38 
  39 /**
  40  * This class defines a Raster with pixels consisting of one or more 16-bit
  41  * data elements stored in close proximity to each other in a short integer
  42  * array.  The bit precision per data element is that
  43  * of the data type (that is, the bit precision for this Raster is 16).
  44  * There is only one pixel stride and one scanline stride for all
  45  * bands.  This type of Raster can be used with a
  46  * ComponentColorModel if there are multiple bands, or a
  47  * IndexColorModel if there is only one band.
  48  * <p>
  49  * For example, 5-6-5 RGB image data can be represented by a
  50  * ShortInterleavedRaster using a SinglePixelPackedSampleModel and
  51  * a ComponentColorModel.
  52  *
  53  *
  54  */
  55 public class ShortInterleavedRaster extends ShortComponentRaster {
  56 
  57     /** A cached copy of minX + width for use in bounds checks. */
  58     private int maxX;
  59 
  60     /** A cached copy of minY + height for use in bounds checks. */
  61     private int maxY;
  62 
  63     /**
  64      *  Constructs a ShortInterleavedRaster with the given SampleModel.
  65      *  The Raster's upper left corner is origin and it is the same
  66      *  size as the SampleModel.  A DataBuffer large enough to describe the
  67      *  Raster is automatically created.  SampleModel must be of type
  68      *  PixelInterleavedSampleModel or SinglePixelPackedSampleModel.
  69      *  @param sampleModel     The SampleModel that specifies the layout.
  70      *  @param origin          The Point that specified the origin.
  71      */
  72     public ShortInterleavedRaster(SampleModel sampleModel, Point origin) {
  73         this(sampleModel,
  74              sampleModel.createDataBuffer(),
  75              new Rectangle(origin.x,
  76                            origin.y,
  77                            sampleModel.getWidth(),
  78                            sampleModel.getHeight()),
  79              origin,
  80              null);
  81     }
  82 
  83     /**
  84      * Constructs a ShortInterleavedRaster with the given SampleModel
  85      * and DataBuffer.  The Raster's upper left corner is origin and
  86      * it is the same sizes the SampleModel.  The DataBuffer is not
  87      * initialized and must be a DataBufferUShort compatible with SampleModel.
  88      * SampleModel must be of type PixelInterleavedSampleModel or
  89      * SinglePixelPackedSampleModel.
  90      * @param sampleModel     The SampleModel that specifies the layout.
  91      * @param dataBuffer      The DataBufferUShort that contains the image data.
  92      * @param origin          The Point that specifies the origin.
  93      */
  94     public ShortInterleavedRaster(SampleModel sampleModel,
  95                                    DataBuffer dataBuffer,
  96                                    Point origin) {
  97         this(sampleModel,
  98              dataBuffer,
  99              new Rectangle(origin.x,
 100                            origin.y,
 101                            sampleModel.getWidth(),
 102                            sampleModel.getHeight()),
 103              origin,
 104              null);
 105     }
 106 
 107     /**
 108      * Constructs a ShortInterleavedRaster with the given SampleModel,
 109      * DataBuffer, and parent.  DataBuffer must be a DataBufferUShort and
 110      * SampleModel must be of type PixelInterleavedSampleModel or
 111      * SinglePixelPackedSampleModel.  When translated into the base Raster's
 112      * coordinate system, aRegion must be contained by the base Raster.
 113      * Origin is the coodinate in the new Raster's coordinate system of
 114      * the origin of the base Raster.  (The base Raster is the Raster's
 115      * ancestor which has no parent.)
 116      *
 117      * Note that this constructor should generally be called by other
 118      * constructors or create methods, it should not be used directly.
 119      * @param sampleModel     The SampleModel that specifies the layout.
 120      * @param dataBuffer      The DataBufferUShort that contains the image data.
 121      * @param aRegion         The Rectangle that specifies the image area.
 122      * @param origin          The Point that specifies the origin.
 123      * @param parent          The parent (if any) of this raster.
 124      */
 125     public ShortInterleavedRaster(SampleModel sampleModel,
 126                                    DataBuffer dataBuffer,
 127                                    Rectangle aRegion,
 128                                    Point origin,
 129                                    ShortInterleavedRaster parent) {
 130 
 131         super(sampleModel, dataBuffer, aRegion, origin, parent);
 132         this.maxX = minX + width;
 133         this.maxY = minY + height;
 134 
 135         if(!(dataBuffer instanceof DataBufferUShort)) {
 136             throw new RasterFormatException("ShortInterleavedRasters must "+
 137                                             "have ushort DataBuffers");
 138         }
 139 
 140         DataBufferUShort dbus = (DataBufferUShort)dataBuffer;
 141         this.data = stealData(dbus, 0);
 142 
 143         // REMIND: need case for interleaved ComponentSampleModel
 144         if ((sampleModel instanceof PixelInterleavedSampleModel) ||
 145             (sampleModel instanceof ComponentSampleModel &&
 146              sampleModel.getNumBands() == 1)) {
 147             ComponentSampleModel csm = (ComponentSampleModel)sampleModel;
 148 
 149             this.scanlineStride = csm.getScanlineStride();
 150             this.pixelStride = csm.getPixelStride();
 151             this.dataOffsets = csm.getBandOffsets();
 152             int xOffset = aRegion.x - origin.x;
 153             int yOffset = aRegion.y - origin.y;
 154             for (int i = 0; i < getNumDataElements(); i++) {
 155                 dataOffsets[i] += xOffset*pixelStride+yOffset*scanlineStride;
 156             }
 157         } else if (sampleModel instanceof SinglePixelPackedSampleModel) {
 158             SinglePixelPackedSampleModel sppsm =
 159                     (SinglePixelPackedSampleModel)sampleModel;
 160             this.scanlineStride = sppsm.getScanlineStride();
 161             this.pixelStride    = 1;
 162             this.dataOffsets = new int[1];
 163             this.dataOffsets[0] = dbus.getOffset();
 164             int xOffset = aRegion.x - origin.x;
 165             int yOffset = aRegion.y - origin.y;
 166             dataOffsets[0] += xOffset+yOffset*scanlineStride;
 167         } else {
 168             throw new RasterFormatException("ShortInterleavedRasters must "+
 169               "have PixelInterleavedSampleModel, SinglePixelPackedSampleModel"+
 170               " or 1 band ComponentSampleModel.  Sample model is "+
 171               sampleModel);
 172         }
 173         this.bandOffset = this.dataOffsets[0];
 174         verify();
 175     }
 176 
 177     /**
 178      * Returns a copy of the data offsets array. For each band the data offset
 179      * is the index into the band's data array, of the first sample of the
 180      * band.
 181      */
 182     public int[] getDataOffsets() {
 183         return dataOffsets.clone();
 184     }
 185 
 186     /**
 187      * Returns the data offset for the specified band.  The data offset
 188      * is the index into the data array in which the first sample
 189      * of the first scanline is stored.
 190      * @param band  The band whose offset is returned.
 191      */
 192     public int getDataOffset(int band) {
 193         return dataOffsets[band];
 194     }
 195 
 196     /**
 197      * Returns the scanline stride -- the number of data array elements between
 198      * a given sample and the same sample in the same column of the next row.
 199      */
 200     public int getScanlineStride() {
 201         return scanlineStride;
 202     }
 203 
 204     /**
 205      * Returns pixel stride -- the number of data array elements  between two
 206      * samples for the same band on the same scanline.
 207      */
 208     public int getPixelStride() {
 209         return pixelStride;
 210     }
 211 
 212     /**
 213      * Returns a reference to the data array.
 214      */
 215     public short[] getDataStorage() {
 216         return data;
 217     }
 218 
 219     /**
 220      * Returns the data elements for all bands at the specified
 221      * location.
 222      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 223      * if the pixel coordinate is out of bounds.
 224      * A ClassCastException will be thrown if the input object is non null
 225      * and references anything other than an array of transferType.
 226      * @param x        The X coordinate of the pixel location.
 227      * @param y        The Y coordinate of the pixel location.
 228      * @param obj      An object reference to an array of type defined by
 229      *                 getTransferType() and length getNumDataElements().
 230      *                 If null an array of appropriate type and size will be
 231      *                 allocated.
 232      * @return         An object reference to an array of type defined by
 233      *                 getTransferType() with the request pixel data.
 234      */
 235     public Object getDataElements(int x, int y, Object obj) {
 236         if ((x < this.minX) || (y < this.minY) ||
 237             (x >= this.maxX) || (y >= this.maxY)) {
 238             throw new ArrayIndexOutOfBoundsException
 239                 ("Coordinate out of bounds!");
 240         }
 241         short outData[];
 242         if (obj == null) {
 243             outData = new short[numDataElements];
 244         } else {
 245             outData = (short[])obj;
 246         }
 247         int off = (y-minY)*scanlineStride +
 248                   (x-minX)*pixelStride;
 249 
 250         for (int band = 0; band < numDataElements; band++) {
 251             outData[band] = data[dataOffsets[band] + off];
 252         }
 253 
 254         return outData;
 255     }
 256 
 257     /**
 258      * Returns an array  of data elements from the specified rectangular
 259      * region.
 260      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 261      * if the pixel coordinates are out of bounds.
 262      * A ClassCastException will be thrown if the input object is non null
 263      * and references anything other than an array of transferType.
 264      * <pre>
 265      *       short[] bandData = (short[])Raster.getDataElements(x, y, w, h, null);
 266      *       int numDataElements = Raster.getBands();
 267      *       short[] pixel = new short[numDataElements];
 268      *       // To find the data element at location (x2, y2)
 269      *       System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
 270      *                        pixel, 0, numDataElements);
 271      * </pre>
 272      * @param x        The X coordinate of the upper left pixel location.
 273      * @param y        The Y coordinate of the upper left pixel location.
 274      * @param w        Width of the pixel rectangle.
 275      * @param h        Height of the pixel rectangle.
 276      * @param obj      An object reference to an array of type defined by
 277      *                 getTransferType() and length w*h*getNumDataElements().
 278      *                 If null an array of appropriate type and size will be
 279      *                 allocated.
 280      * @return         An object reference to an array of type defined by
 281      *                 getTransferType() with the request pixel data.
 282      */
 283     public Object getDataElements(int x, int y, int w, int h, Object obj) {
 284         if ((x < this.minX) || (y < this.minY) ||
 285             (x + w > this.maxX) || (y + h > this.maxY)) {
 286             throw new ArrayIndexOutOfBoundsException
 287                 ("Coordinate out of bounds!");
 288         }
 289         short outData[];
 290         if (obj == null) {
 291             outData = new short[w*h*numDataElements];
 292         } else {
 293             outData = (short[])obj;
 294         }
 295         int yoff = (y-minY)*scanlineStride +
 296                    (x-minX)*pixelStride;
 297 
 298         int xoff;
 299         int off = 0;
 300         int xstart;
 301         int ystart;
 302 
 303         for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 304             xoff = yoff;
 305             for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
 306                 for (int c = 0; c < numDataElements; c++) {
 307                     outData[off++] = data[dataOffsets[c] + xoff];
 308                 }
 309             }
 310         }
 311 
 312         return outData;
 313     }
 314 
 315     /**
 316      * Returns a short integer array of data elements from the
 317      * specified rectangular region.
 318      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 319      * if the pixel coordinates are out of bounds.
 320      * <pre>
 321      *       short[] bandData = Raster.getShortData(x, y, w, h, null);
 322      *       // To find the data element at location (x2, y2)
 323      *       short dataElenent = bandData[((y2-y)*w + (x2-x))];
 324      * </pre>
 325      * @param x        The X coordinate of the upper left pixel location.
 326      * @param y        The Y coordinate of the upper left pixel location.
 327      * @param w        Width of the sample rectangle.
 328      * @param h        Height of the sample rectangle.
 329      * @param band     The band to return.
 330      * @param outData  If non-null, data elements for all bands
 331      *                 at the specified location are returned in this array.
 332      * @return         Data array with data elements for all bands.
 333      */
 334     public short[] getShortData(int x, int y, int w, int h,
 335                                int band, short[] outData) {
 336         // Bounds check for 'band' will be performed automatically
 337         if ((x < this.minX) || (y < this.minY) ||
 338             (x + w > this.maxX) || (y + h > this.maxY)) {
 339             throw new ArrayIndexOutOfBoundsException
 340                 ("Coordinate out of bounds!");
 341         }
 342         if (outData == null) {
 343             outData = new short[numDataElements*w*h];
 344         }
 345         int yoff =  (y-minY)*scanlineStride +
 346                     (x-minX)*pixelStride+ dataOffsets[band];
 347         int xoff;
 348         int off = 0;
 349         int xstart;
 350         int ystart;
 351 
 352         if (pixelStride == 1) {
 353             if (scanlineStride == w) {
 354                 System.arraycopy(data, yoff, outData, 0, w*h);
 355             }
 356             else {
 357                 for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 358                     System.arraycopy(data, yoff, outData, off, w);
 359                     off += w;
 360                 }
 361             }
 362         }
 363         else {
 364             for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 365                 xoff = yoff;
 366                 for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
 367                     outData[off++] = data[xoff];
 368                 }
 369             }
 370         }
 371 
 372         return outData;
 373     }
 374 
 375     /**
 376      * Returns a short integer array  of data elements from the
 377      * specified rectangular region.
 378      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 379      * if the pixel coordinates are out of bounds.
 380      * <pre>
 381      *       short[] bandData = Raster.getShortData(x, y, w, h, null);
 382      *       int numDataElements = Raster.getNumBands();
 383      *       short[] pixel = new short[numDataElements];
 384      *       // To find the data element at location (x2, y2)
 385      *       System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
 386      *                        pixel, 0, numDataElements);
 387      * </pre>
 388      * @param x        The X coordinate of the upper left pixel location.
 389      * @param y        The Y coordinate of the upper left pixel location.
 390      * @param w        Width of the pixel rectangle.
 391      * @param h        Height of the pixel rectangle.
 392      * @param outData  If non-null, data elements for all bands
 393      *                 at the specified location are returned in this array.
 394      * @return         Data array with data elements for all bands.
 395      */
 396     public short[] getShortData(int x, int y, int w, int h, short[] outData) {
 397         if ((x < this.minX) || (y < this.minY) ||
 398             (x + w > this.maxX) || (y + h > this.maxY)) {
 399             throw new ArrayIndexOutOfBoundsException
 400                 ("Coordinate out of bounds!");
 401         }
 402         if (outData == null) {
 403             outData = new short[numDataElements*w*h];
 404         }
 405         int yoff = (y-minY)*scanlineStride +
 406                    (x-minX)*pixelStride;
 407         int xoff;
 408         int off = 0;
 409         int xstart;
 410         int ystart;
 411 
 412         for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 413             xoff = yoff;
 414             for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
 415                 for (int c = 0; c < numDataElements; c++) {
 416                     outData[off++] = data[dataOffsets[c] + xoff];
 417                 }
 418             }
 419         }
 420 
 421         return outData;
 422     }
 423 
 424     /**
 425      * Stores the data elements for all bands at the specified location.
 426      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 427      * if the pixel coordinate is out of bounds.
 428      * A ClassCastException will be thrown if the input object is non null
 429      * and references anything other than an array of transferType.
 430      * @param x        The X coordinate of the pixel location.
 431      * @param y        The Y coordinate of the pixel location.
 432      * @param obj      An object reference to an array of type defined by
 433      *                 getTransferType() and length getNumDataElements()
 434      *                 containing the pixel data to place at x,y.
 435      */
 436     public void setDataElements(int x, int y, Object obj) {
 437         if ((x < this.minX) || (y < this.minY) ||
 438             (x >= this.maxX) || (y >= this.maxY)) {
 439             throw new ArrayIndexOutOfBoundsException
 440                 ("Coordinate out of bounds!");
 441         }
 442         short inData[] = (short[])obj;
 443         int off = (y-minY)*scanlineStride +
 444                   (x-minX)*pixelStride;
 445         for (int i = 0; i < numDataElements; i++) {
 446             data[dataOffsets[i] + off] = inData[i];
 447         }
 448         markDirty();
 449     }
 450 
 451     /**
 452      * Stores the Raster data at the specified location.
 453      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 454      * if the pixel coordinates are out of bounds.
 455      * @param x          The X coordinate of the pixel location.
 456      * @param y          The Y coordinate of the pixel location.
 457      * @param inRaster   Raster of data to place at x,y location.
 458      */
 459     public void setDataElements(int x, int y, Raster inRaster) {
 460         int dstOffX = x + inRaster.getMinX();
 461         int dstOffY = y + inRaster.getMinY();
 462         int width  = inRaster.getWidth();
 463         int height = inRaster.getHeight();
 464         if ((dstOffX < this.minX) || (dstOffY < this.minY) ||
 465             (dstOffX + width > this.maxX) || (dstOffY + height > this.maxY)) {
 466             throw new ArrayIndexOutOfBoundsException
 467                 ("Coordinate out of bounds!");
 468         }
 469 
 470         setDataElements(dstOffX, dstOffY, width, height, inRaster);
 471     }
 472 
 473     /**
 474      * Stores the Raster data at the specified location.
 475      * @param dstX The absolute X coordinate of the destination pixel
 476      * that will receive a copy of the upper-left pixel of the
 477      * inRaster
 478      * @param dstY The absolute Y coordinate of the destination pixel
 479      * that will receive a copy of the upper-left pixel of the
 480      * inRaster
 481      * @param width      The number of pixels to store horizontally
 482      * @param height     The number of pixels to store vertically
 483      * @param inRaster   Raster of data to place at x,y location.
 484      */
 485     private void setDataElements(int dstX, int dstY,
 486                                  int width, int height,
 487                                  Raster inRaster) {
 488         // Assume bounds checking has been performed previously
 489         if (width <= 0 || height <= 0) {
 490             return;
 491         }
 492 
 493         // Write inRaster (minX, minY) to (dstX, dstY)
 494 
 495         int srcOffX = inRaster.getMinX();
 496         int srcOffY = inRaster.getMinY();
 497         Object tdata = null;
 498 
 499 //      REMIND: Do something faster!
 500 //      if (inRaster instanceof ShortInterleavedRaster) {
 501 //      }
 502 
 503         for (int startY=0; startY < height; startY++) {
 504             // Grab one scanline at a time
 505             tdata = inRaster.getDataElements(srcOffX, srcOffY+startY,
 506                                              width, 1, tdata);
 507             setDataElements(dstX, dstY + startY, width, 1, tdata);
 508         }
 509     }
 510 
 511     /**
 512      * Stores an array of data elements into the specified rectangular
 513      * region.
 514      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 515      * if the pixel coordinates are out of bounds.
 516      * A ClassCastException will be thrown if the input object is non null
 517      * and references anything other than an array of transferType.
 518      * The data elements in the
 519      * data array are assumed to be packed.  That is, a data element
 520      * for the nth band at location (x2, y2) would be found at:
 521      * <pre>
 522      *      inData[((y2-y)*w + (x2-x))*numDataElements + n]
 523      * </pre>
 524      * @param x        The X coordinate of the upper left pixel location.
 525      * @param y        The Y coordinate of the upper left pixel location.
 526      * @param w        Width of the pixel rectangle.
 527      * @param h        Height of the pixel rectangle.
 528      * @param obj      An object reference to an array of type defined by
 529      *                 getTransferType() and length w*h*getNumDataElements()
 530      *                 containing the pixel data to place between x,y and
 531      *                 x+h, y+h.
 532      */
 533     public void setDataElements(int x, int y, int w, int h, Object obj) {
 534         if ((x < this.minX) || (y < this.minY) ||
 535             (x + w > this.maxX) || (y + h > this.maxY)) {
 536             throw new ArrayIndexOutOfBoundsException
 537                 ("Coordinate out of bounds!");
 538         }
 539         short inData[] = (short[])obj;
 540         int yoff = (y-minY)*scanlineStride +
 541                    (x-minX)*pixelStride;
 542         int xoff;
 543         int off = 0;
 544         int xstart;
 545         int ystart;
 546 
 547         for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 548             xoff = yoff;
 549             for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
 550                 for (int c = 0; c < numDataElements; c++) {
 551                     data[dataOffsets[c] + xoff] = inData[off++];
 552                 }
 553             }
 554         }
 555 
 556         markDirty();
 557     }
 558 
 559     /**
 560      * Stores a short integer array of data elements into the
 561      * specified rectangular region.
 562      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 563      * if the pixel coordinates are out of bounds.
 564      * The data elements in the
 565      * data array are assumed to be packed.  That is, a data element
 566      * at location (x2, y2) would be found at:
 567      * <pre>
 568      *      inData[((y2-y)*w + (x2-x))]
 569      * </pre>
 570      * @param x        The X coordinate of the upper left pixel location.
 571      * @param y        The Y coordinate of the upper left pixel location.
 572      * @param w        Width of the pixel rectangle.
 573      * @param h        Height of the pixel rectangle.
 574      * @param band     The band to set.
 575      * @param inData   The data elements to be stored.
 576      */
 577     public void putShortData(int x, int y, int w, int h,
 578                              int band, short[] inData) {
 579         // Bounds check for 'band' will be performed automatically
 580         if ((x < this.minX) || (y < this.minY) ||
 581             (x + w > this.maxX) || (y + h > this.maxY)) {
 582             throw new ArrayIndexOutOfBoundsException
 583                 ("Coordinate out of bounds!");
 584         }
 585         int yoff =  (y-minY)*scanlineStride +
 586                     (x-minX)*pixelStride + dataOffsets[band];
 587         int xoff;
 588         int off = 0;
 589         int xstart;
 590         int ystart;
 591 
 592         if (pixelStride == 1) {
 593             if (scanlineStride == w) {
 594                 System.arraycopy(inData, 0, data, yoff, w*h);
 595             }
 596             else {
 597                 for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 598                     System.arraycopy(inData, off, data, yoff, w);
 599                     off += w;
 600                 }
 601             }
 602         }
 603         else {
 604             for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 605                 xoff = yoff;
 606                 for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
 607                     data[xoff] = inData[off++];
 608                 }
 609             }
 610         }
 611 
 612         markDirty();
 613     }
 614 
 615     /**
 616      * Stores a short integer array of data elements into the
 617      * specified rectangular region.
 618      * An ArrayIndexOutOfBounds exception will be thrown at runtime
 619      * if the pixel coordinates are out of bounds.
 620      * The data elements in the
 621      * data array are assumed to be packed.  That is, a data element
 622      * for the nth band at location (x2, y2) would be found at:
 623      * <pre>
 624      *      inData[((y2-y)*w + (x2-x))*numDataElements + n]
 625      * </pre>
 626      * @param x        The X coordinate of the upper left pixel location.
 627      * @param y        The Y coordinate of the upper left pixel location.
 628      * @param w        Width of the pixel rectangle.
 629      * @param h        Height of the pixel rectangle.
 630      * @param inData   The data elements to be stored.
 631      */
 632     public void putShortData(int x, int y, int w, int h, short[] inData) {
 633         if ((x < this.minX) || (y < this.minY) ||
 634             (x + w > this.maxX) || (y + h > this.maxY)) {
 635             throw new ArrayIndexOutOfBoundsException
 636                 ("Coordinate out of bounds!");
 637         }
 638         int yoff = (y-minY)*scanlineStride +
 639                    (x-minX)*pixelStride;
 640         int xoff;
 641         int off = 0;
 642         int xstart;
 643         int ystart;
 644 
 645         for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
 646             xoff = yoff;
 647             for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
 648                 for (int c = 0; c < numDataElements; c++) {
 649                     data[dataOffsets[c] + xoff] = inData[off++];
 650                 }
 651             }
 652         }
 653 
 654         markDirty();
 655     }
 656 
 657     /**
 658      * Creates a subraster given a region of the raster.  The x and y
 659      * coordinates specify the horizontal and vertical offsets
 660      * from the upper-left corner of this raster to the upper-left corner
 661      * of the subraster.  A subset of the bands of the parent Raster may
 662      * be specified.  If this is null, then all the bands are present in the
 663      * subRaster. A translation to the subRaster may also be specified.
 664      * Note that the subraster will reference the same
 665      * band objects as the parent raster, but using different offsets.
 666      * @param x               X offset.
 667      * @param y               Y offset.
 668      * @param width           Width (in pixels) of the subraster.
 669      * @param height          Height (in pixels) of the subraster.
 670      * @param x0              Translated X origin of the subraster.
 671      * @param y0              Translated Y origin of the subraster.
 672      * @param bandList        Array of band indices.
 673      * @exception RasterFormatException
 674      *            if the specified bounding box is outside of the parent raster.
 675      */
 676     public Raster createChild (int x, int y,
 677                                int width, int height,
 678                                int x0, int y0, int[] bandList) {
 679         WritableRaster newRaster = createWritableChild(x, y,
 680                                                        width, height,
 681                                                        x0, y0,
 682                                                        bandList);
 683         return (Raster) newRaster;
 684     }
 685 
 686     /**
 687      * Creates a Writable subRaster given a region of the Raster. The x and y
 688      * coordinates specify the horizontal and vertical offsets
 689      * from the upper-left corner of this Raster to the upper-left corner
 690      * of the subRaster.  A subset of the bands of the parent Raster may
 691      * be specified.  If this is null, then all the bands are present in the
 692      * subRaster. A translation to the subRaster may also be specified.
 693      * Note that the subRaster will reference the same
 694      * DataBuffers as the parent Raster, but using different offsets.
 695      * @param x               X offset.
 696      * @param y               Y offset.
 697      * @param width           Width (in pixels) of the subraster.
 698      * @param height          Height (in pixels) of the subraster.
 699      * @param x0              Translated X origin of the subraster.
 700      * @param y0              Translated Y origin of the subraster.
 701      * @param bandList        Array of band indices.
 702      * @exception RasterFormatException
 703      *            if the specified bounding box is outside of the parent Raster.
 704      */
 705     public WritableRaster createWritableChild(int x, int y,
 706                                               int width, int height,
 707                                               int x0, int y0,
 708                                               int[] bandList) {
 709         if (x < this.minX) {
 710             throw new RasterFormatException("x lies outside the raster");
 711         }
 712         if (y < this.minY) {
 713             throw new RasterFormatException("y lies outside the raster");
 714         }
 715         if ((x+width < x) || (x+width > this.minX + this.width)) {
 716             throw new RasterFormatException("(x + width) is outside of Raster");
 717         }
 718         if ((y+height < y) || (y+height > this.minY + this.height)) {
 719             throw new RasterFormatException("(y + height) is outside of Raster");
 720         }
 721 
 722         SampleModel sm;
 723 
 724         if (bandList != null)
 725             sm = sampleModel.createSubsetSampleModel(bandList);
 726         else
 727             sm = sampleModel;
 728 
 729         int deltaX = x0 - x;
 730         int deltaY = y0 - y;
 731 
 732         return new ShortInterleavedRaster(sm,
 733                                        dataBuffer,
 734                                        new Rectangle(x0, y0, width, height),
 735                                        new Point(sampleModelTranslateX+deltaX,
 736                                                  sampleModelTranslateY+deltaY),
 737                                        this);
 738     }
 739 
 740     /**
 741      * Creates a Raster with the same layout but using a different
 742      * width and height, and with new zeroed data arrays.
 743      */
 744     public WritableRaster createCompatibleWritableRaster(int w, int h) {
 745         if (w <= 0 || h <=0) {
 746             throw new RasterFormatException("negative "+
 747                                           ((w <= 0) ? "width" : "height"));
 748         }
 749 
 750         SampleModel sm = sampleModel.createCompatibleSampleModel(w, h);
 751 
 752         return new ShortInterleavedRaster(sm, new Point(0, 0));
 753     }
 754 
 755     /**
 756      * Creates a Raster with the same layout and the same
 757      * width and height, and with new zeroed data arrays.  If
 758      * the Raster is a subRaster, this will call
 759      * createCompatibleRaster(width, height).
 760      */
 761     public WritableRaster createCompatibleWritableRaster() {
 762         return createCompatibleWritableRaster(width,height);
 763     }
 764 
 765     public String toString() {
 766         return new String ("ShortInterleavedRaster: width = "+width
 767                            +" height = " + height
 768                            +" #numDataElements "+numDataElements);
 769                            // +" xOff = "+xOffset+" yOff = "+yOffset);
 770     }
 771 
 772 }