View Javadoc
1   /*
2    * Copyright (c) 1998, 2012, 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 (int[]) 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 outData  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 width    Width of the pixel rectangle.
275      * @param height   Height of the pixel rectangle.
276      * @param outData  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 width    Width of the sample rectangle.
328      * @param height   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 width    Width of the pixel rectangle.
391      * @param height   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 inData   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] = (short) 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 inData   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] = (short) 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 }