J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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.SinglePixelPackedSampleModel; |
| 32 | import java.awt.image.DataBuffer; |
| 33 | import java.awt.image.DataBufferInt; |
| 34 | import java.awt.Rectangle; |
| 35 | import java.awt.Point; |
| 36 | |
| 37 | /** |
| 38 | * This class defines a Raster with pixels consisting of one or more 32-bit |
| 39 | * data elements stored in close proximity to each other in a integer array. |
| 40 | * The bit precision per data element is that |
| 41 | * of the data type (that is, the bit precision for this raster is 32). |
| 42 | * There is only one pixel stride and one scanline stride for all |
| 43 | * bands. For a given pixel, all samples fit in N data elements and these |
| 44 | * N data elements hold samples for only one pixel. This type of Raster |
| 45 | * can be used with a PackedColorModel. |
| 46 | * <p> |
| 47 | * For example, if there is only one data element per pixel, a |
| 48 | * SinglePixelPackedSampleModel can be used to represent multiple |
| 49 | * bands with a PackedColorModel (including a DirectColorModel) for |
| 50 | * color interpretation. |
| 51 | * |
| 52 | */ |
| 53 | public class IntegerInterleavedRaster extends IntegerComponentRaster { |
| 54 | |
| 55 | /** A cached copy of minX + width for use in bounds checks. */ |
| 56 | private int maxX; |
| 57 | |
| 58 | /** A cached copy of minY + height for use in bounds checks. */ |
| 59 | private int maxY; |
| 60 | |
| 61 | /** |
| 62 | * Constructs a IntegerInterleavedRaster with the given SampleModel. |
| 63 | * The Raster's upper left corner is origin and it is the same |
| 64 | * size as the SampleModel. A DataBuffer large enough to describe the |
| 65 | * Raster is automatically created. SampleModel must be of type |
| 66 | * SinglePixelPackedSampleModel. |
| 67 | * @param sampleModel The SampleModel that specifies the layout. |
| 68 | * @param origin The Point that specified the origin. |
| 69 | */ |
| 70 | public IntegerInterleavedRaster(SampleModel sampleModel, |
| 71 | Point origin) { |
| 72 | this(sampleModel, |
| 73 | sampleModel.createDataBuffer(), |
| 74 | new Rectangle(origin.x, |
| 75 | origin.y, |
| 76 | sampleModel.getWidth(), |
| 77 | sampleModel.getHeight()), |
| 78 | origin, |
| 79 | null); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Constructs a IntegerInterleavedRaster with the given SampleModel |
| 84 | * and DataBuffer. The Raster's upper left corner is origin and |
| 85 | * it is the same sizes the SampleModel. The DataBuffer is not |
| 86 | * initialized and must be a DataBufferInt compatible with SampleModel. |
| 87 | * SampleModel must be of type SinglePixelPackedSampleModel. |
| 88 | * @param sampleModel The SampleModel that specifies the layout. |
| 89 | * @param dataBuffer The DataBufferInt that contains the image data. |
| 90 | * @param origin The Point that specifies the origin. |
| 91 | */ |
| 92 | public IntegerInterleavedRaster(SampleModel sampleModel, |
| 93 | DataBuffer dataBuffer, |
| 94 | Point origin) { |
| 95 | this(sampleModel, |
| 96 | dataBuffer, |
| 97 | new Rectangle(origin.x, |
| 98 | origin.y, |
| 99 | sampleModel.getWidth(), |
| 100 | sampleModel.getHeight()), |
| 101 | origin, |
| 102 | null); |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Constructs a IntegerInterleavedRaster with the given SampleModel, |
| 107 | * DataBuffer, and parent. DataBuffer must be a DataBufferInt and |
| 108 | * SampleModel must be of type SinglePixelPackedSampleModel. |
| 109 | * When translated into the base Raster's |
| 110 | * coordinate system, aRegion must be contained by the base Raster. |
| 111 | * Origin is the coodinate in the new Raster's coordinate system of |
| 112 | * the origin of the base Raster. (The base Raster is the Raster's |
| 113 | * ancestor which has no parent.) |
| 114 | * |
| 115 | * Note that this constructor should generally be called by other |
| 116 | * constructors or create methods, it should not be used directly. |
| 117 | * @param sampleModel The SampleModel that specifies the layout. |
| 118 | * @param dataBuffer The DataBufferInt that contains the image data. |
| 119 | * @param aRegion The Rectangle that specifies the image area. |
| 120 | * @param origin The Point that specifies the origin. |
| 121 | * @param parent The parent (if any) of this raster. |
| 122 | */ |
| 123 | public IntegerInterleavedRaster(SampleModel sampleModel, |
| 124 | DataBuffer dataBuffer, |
| 125 | Rectangle aRegion, |
| 126 | Point origin, |
| 127 | IntegerInterleavedRaster parent){ |
| 128 | super(sampleModel,dataBuffer,aRegion,origin,parent); |
| 129 | this.maxX = minX + width; |
| 130 | this.maxY = minY + height; |
| 131 | if (!(dataBuffer instanceof DataBufferInt)) { |
| 132 | throw new RasterFormatException("IntegerInterleavedRasters must have" + |
| 133 | "integer DataBuffers"); |
| 134 | } |
| 135 | DataBufferInt dbi = (DataBufferInt)dataBuffer; |
| 136 | this.data = stealData(dbi, 0); |
| 137 | |
| 138 | if (sampleModel instanceof SinglePixelPackedSampleModel) { |
| 139 | SinglePixelPackedSampleModel sppsm = |
| 140 | (SinglePixelPackedSampleModel)sampleModel; |
| 141 | this.scanlineStride = sppsm.getScanlineStride(); |
| 142 | this.pixelStride = 1; |
| 143 | this.dataOffsets = new int[1]; |
| 144 | this.dataOffsets[0] = dbi.getOffset(); |
| 145 | this.bandOffset = this.dataOffsets[0]; |
| 146 | int xOffset = aRegion.x - origin.x; |
| 147 | int yOffset = aRegion.y - origin.y; |
| 148 | dataOffsets[0] += xOffset+yOffset*scanlineStride; |
| 149 | this.numDataElems = sppsm.getNumDataElements(); |
| 150 | } else { |
| 151 | throw new RasterFormatException("IntegerInterleavedRasters must have"+ |
| 152 | " SinglePixelPackedSampleModel"); |
| 153 | } |
| 154 | verify(false); |
| 155 | } |
| 156 | |
| 157 | |
| 158 | /** |
| 159 | * Returns a copy of the data offsets array. For each band the data offset |
| 160 | * is the index into the band's data array, of the first sample of the |
| 161 | * band. |
| 162 | */ |
| 163 | public int[] getDataOffsets() { |
| 164 | return (int[]) dataOffsets.clone(); |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Returns data offset for the specified band. The data offset |
| 169 | * is the index into the data array in which the first sample |
| 170 | * of the first scanline is stored. |
| 171 | */ |
| 172 | public int getDataOffset(int band) { |
| 173 | return dataOffsets[band]; |
| 174 | } |
| 175 | |
| 176 | |
| 177 | /** |
| 178 | * Returns the scanline stride -- the number of data array elements between |
| 179 | * a given sample and the sample in the same column of the next row. |
| 180 | */ |
| 181 | public int getScanlineStride() { |
| 182 | return scanlineStride; |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Returns pixel stride -- the number of data array elements between two |
| 187 | * samples for the same band on the same scanline. |
| 188 | */ |
| 189 | public int getPixelStride() { |
| 190 | return pixelStride; |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Returns a reference to the data array. |
| 195 | */ |
| 196 | public int[] getDataStorage() { |
| 197 | return data; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Returns the data elements for all bands at the specified |
| 202 | * location. |
| 203 | * An ArrayIndexOutOfBounds exception will be thrown at runtime |
| 204 | * if the pixel coordinate is out of bounds. |
| 205 | * A ClassCastException will be thrown if the input object is non null |
| 206 | * and references anything other than an array of transferType. |
| 207 | * @param x The X coordinate of the pixel location. |
| 208 | * @param y The Y coordinate of the pixel location. |
| 209 | * @param outData An object reference to an array of type defined by |
| 210 | * getTransferType() and length getNumDataElements(). |
| 211 | * If null an array of appropriate type and size will be |
| 212 | * allocated. |
| 213 | * @return An object reference to an array of type defined by |
| 214 | * getTransferType() with the request pixel data. |
| 215 | */ |
| 216 | public Object getDataElements(int x, int y, Object obj) { |
| 217 | if ((x < this.minX) || (y < this.minY) || |
| 218 | (x >= this.maxX) || (y >= this.maxY)) { |
| 219 | throw new ArrayIndexOutOfBoundsException |
| 220 | ("Coordinate out of bounds!"); |
| 221 | } |
| 222 | int outData[]; |
| 223 | if (obj == null) { |
| 224 | outData = new int[1]; |
| 225 | } else { |
| 226 | outData = (int[])obj; |
| 227 | } |
| 228 | int off = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0]; |
| 229 | outData[0] = data[off]; |
| 230 | |
| 231 | return outData; |
| 232 | } |
| 233 | |
| 234 | |
| 235 | /** |
| 236 | * Returns an array of data elements from the specified rectangular |
| 237 | * region. |
| 238 | * An ArrayIndexOutOfBounds exception will be thrown at runtime |
| 239 | * if the pixel coordinates are out of bounds. |
| 240 | * A ClassCastException will be thrown if the input object is non null |
| 241 | * and references anything other than an array of transferType. |
| 242 | <pre> |
| 243 | * int[] bandData = (int[])raster.getDataElements(x, y, w, h, null); |
| 244 | * int numDataElements = raster.getNumDataElements(); |
| 245 | * int[] pixel = new int[numDataElements]; |
| 246 | * // To find a data element at location (x2, y2) |
| 247 | * System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements, |
| 248 | * pixel, 0, numDataElements); |
| 249 | * </pre> |
| 250 | * @param x The X coordinate of the upper left pixel location. |
| 251 | * @param y The Y coordinate of the upper left pixel location. |
| 252 | * @param width Width of the pixel rectangle. |
| 253 | * @param height Height of the pixel rectangle. |
| 254 | * @param outData An object reference to an array of type defined by |
| 255 | * getTransferType() and length w*h*getNumDataElements(). |
| 256 | * If null an array of appropriate type and size will be |
| 257 | * allocated. |
| 258 | * @return An object reference to an array of type defined by |
| 259 | * getTransferType() with the request pixel data. |
| 260 | */ |
| 261 | public Object getDataElements(int x, int y, int w, int h, Object obj) { |
| 262 | if ((x < this.minX) || (y < this.minY) || |
| 263 | (x + w > this.maxX) || (y + h > this.maxY)) { |
| 264 | throw new ArrayIndexOutOfBoundsException |
| 265 | ("Coordinate out of bounds!"); |
| 266 | } |
| 267 | int outData[]; |
| 268 | if (obj instanceof int[]) { |
| 269 | outData = (int[])obj; |
| 270 | } else { |
| 271 | outData = new int[w*h]; |
| 272 | } |
| 273 | int yoff = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0]; |
| 274 | int off = 0; |
| 275 | |
| 276 | for (int ystart = 0; ystart < h; ystart++) { |
| 277 | System.arraycopy(data, yoff, outData, off, w); |
| 278 | off += w; |
| 279 | yoff += scanlineStride; |
| 280 | } |
| 281 | |
| 282 | return outData; |
| 283 | } |
| 284 | |
| 285 | |
| 286 | /** |
| 287 | * Stores the data elements for all bands at the specified location. |
| 288 | * An ArrayIndexOutOfBounds exception will be thrown at runtime |
| 289 | * if the pixel coordinate is out of bounds. |
| 290 | * A ClassCastException will be thrown if the input object is non null |
| 291 | * and references anything other than an array of transferType. |
| 292 | * @param x The X coordinate of the pixel location. |
| 293 | * @param y The Y coordinate of the pixel location. |
| 294 | * @param inData An object reference to an array of type defined by |
| 295 | * getTransferType() and length getNumDataElements() |
| 296 | * containing the pixel data to place at x,y. |
| 297 | */ |
| 298 | public void setDataElements(int x, int y, Object obj) { |
| 299 | if ((x < this.minX) || (y < this.minY) || |
| 300 | (x >= this.maxX) || (y >= this.maxY)) { |
| 301 | throw new ArrayIndexOutOfBoundsException |
| 302 | ("Coordinate out of bounds!"); |
| 303 | } |
| 304 | int inData[] = (int[])obj; |
| 305 | |
| 306 | int off = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0]; |
| 307 | |
| 308 | data[off] = inData[0]; |
| 309 | |
| 310 | markDirty(); |
| 311 | } |
| 312 | |
| 313 | |
| 314 | /** |
| 315 | * Stores the Raster data at the specified location. |
| 316 | * The transferType of the inputRaster must match this raster. |
| 317 | * An ArrayIndexOutOfBoundsException will be thrown at runtime |
| 318 | * if the pixel coordinates are out of bounds. |
| 319 | * @param x The X coordinate of the pixel location. |
| 320 | * @param y The Y coordinate of the pixel location. |
| 321 | * @param inRaster Raster of data to place at x,y location. |
| 322 | */ |
| 323 | public void setDataElements(int x, int y, Raster inRaster) { |
| 324 | int dstOffX = x + inRaster.getMinX(); |
| 325 | int dstOffY = y + inRaster.getMinY(); |
| 326 | int width = inRaster.getWidth(); |
| 327 | int height = inRaster.getHeight(); |
| 328 | if ((dstOffX < this.minX) || (dstOffY < this.minY) || |
| 329 | (dstOffX + width > this.maxX) || (dstOffY + height > this.maxY)) { |
| 330 | throw new ArrayIndexOutOfBoundsException |
| 331 | ("Coordinate out of bounds!"); |
| 332 | } |
| 333 | |
| 334 | setDataElements(dstOffX, dstOffY, width, height, inRaster); |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * Stores the Raster data at the specified location. |
| 339 | * @param dstX The absolute X coordinate of the destination pixel |
| 340 | * that will receive a copy of the upper-left pixel of the |
| 341 | * inRaster |
| 342 | * @param dstY The absolute Y coordinate of the destination pixel |
| 343 | * that will receive a copy of the upper-left pixel of the |
| 344 | * inRaster |
| 345 | * @param width The number of pixels to store horizontally |
| 346 | * @param height The number of pixels to store vertically |
| 347 | * @param inRaster Raster of data to place at x,y location. |
| 348 | */ |
| 349 | private void setDataElements(int dstX, int dstY, |
| 350 | int width, int height, |
| 351 | Raster inRaster) { |
| 352 | // Assume bounds checking has been performed previously |
| 353 | if (width <= 0 || height <= 0) { |
| 354 | return; |
| 355 | } |
| 356 | |
| 357 | // Write inRaster (minX, minY) to (dstX, dstY) |
| 358 | |
| 359 | int srcOffX = inRaster.getMinX(); |
| 360 | int srcOffY = inRaster.getMinY(); |
| 361 | int tdata[] = null; |
| 362 | |
| 363 | if (inRaster instanceof IntegerInterleavedRaster) { |
| 364 | IntegerInterleavedRaster ict = (IntegerInterleavedRaster) inRaster; |
| 365 | |
| 366 | // Extract the raster parameters |
| 367 | tdata = ict.getDataStorage(); |
| 368 | int tss = ict.getScanlineStride(); |
| 369 | int toff = ict.getDataOffset(0); |
| 370 | |
| 371 | int srcOffset = toff; |
| 372 | int dstOffset = dataOffsets[0]+(dstY-minY)*scanlineStride+ |
| 373 | (dstX-minX); |
| 374 | |
| 375 | |
| 376 | // Fastest case. We can copy scanlines |
| 377 | // Loop through all of the scanlines and copy the data |
| 378 | for (int startY=0; startY < height; startY++) { |
| 379 | System.arraycopy(tdata, srcOffset, data, dstOffset, width); |
| 380 | srcOffset += tss; |
| 381 | dstOffset += scanlineStride; |
| 382 | } |
| 383 | markDirty(); |
| 384 | return; |
| 385 | } |
| 386 | |
| 387 | Object odata = null; |
| 388 | for (int startY=0; startY < height; startY++) { |
| 389 | // Grab one scanline at a time |
| 390 | odata = inRaster.getDataElements(srcOffX, srcOffY+startY, |
| 391 | width, 1, odata); |
| 392 | setDataElements(dstX, dstY+startY, width, 1, odata); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Stores an array of data elements into the specified rectangular |
| 398 | * region. |
| 399 | * An ArrayIndexOutOfBounds exception will be thrown at runtime |
| 400 | * if the pixel coordinates are out of bounds. |
| 401 | * A ClassCastException will be thrown if the input object is non null |
| 402 | * and references anything other than an array of transferType. |
| 403 | * The data elements in the |
| 404 | * data array are assumed to be packed. That is, a data element |
| 405 | * for the nth band at location (x2, y2) would be found at: |
| 406 | * <pre> |
| 407 | * inData[((y2-y)*w + (x2-x))*numDataElements + n] |
| 408 | * </pre> |
| 409 | * @param x The X coordinate of the upper left pixel location. |
| 410 | * @param y The Y coordinate of the upper left pixel location. |
| 411 | * @param w Width of the pixel rectangle. |
| 412 | * @param h Height of the pixel rectangle. |
| 413 | * @param inData An object reference to an array of type defined by |
| 414 | * getTransferType() and length w*h*getNumDataElements() |
| 415 | * containing the pixel data to place between x,y and |
| 416 | * x+h, y+h. |
| 417 | */ |
| 418 | public void setDataElements(int x, int y, int w, int h, Object obj) { |
| 419 | if ((x < this.minX) || (y < this.minY) || |
| 420 | (x + w > this.maxX) || (y + h > this.maxY)) { |
| 421 | throw new ArrayIndexOutOfBoundsException |
| 422 | ("Coordinate out of bounds!"); |
| 423 | } |
| 424 | int inData[] = (int[])obj; |
| 425 | int yoff = (y-minY)*scanlineStride + (x-minX) + dataOffsets[0]; |
| 426 | int off = 0; |
| 427 | |
| 428 | for (int ystart = 0; ystart < h; ystart++) { |
| 429 | System.arraycopy(inData, off, data, yoff, w); |
| 430 | off += w; |
| 431 | yoff += scanlineStride; |
| 432 | } |
| 433 | |
| 434 | markDirty(); |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * Creates a subraster given a region of the raster. The x and y |
| 439 | * coordinates specify the horizontal and vertical offsets |
| 440 | * from the upper-left corner of this raster to the upper-left corner |
| 441 | * of the subraster. A subset of the bands of the parent Raster may |
| 442 | * be specified. If this is null, then all the bands are present in the |
| 443 | * subRaster. A translation to the subRaster may also be specified. |
| 444 | * Note that the subraster will reference the same |
| 445 | * DataBuffer as the parent raster, but using different offsets. |
| 446 | * @param x X offset. |
| 447 | * @param y Y offset. |
| 448 | * @param width Width (in pixels) of the subraster. |
| 449 | * @param height Height (in pixels) of the subraster. |
| 450 | * @param x0 Translated X origin of the subraster. |
| 451 | * @param y0 Translated Y origin of the subraster. |
| 452 | * @param bandList Array of band indices. |
| 453 | * @exception RasterFormatException |
| 454 | * if the specified bounding box is outside of the parent raster. |
| 455 | */ |
| 456 | public WritableRaster createWritableChild (int x, int y, |
| 457 | int width, int height, |
| 458 | int x0, int y0, |
| 459 | int bandList[]) { |
| 460 | if (x < this.minX) { |
| 461 | throw new RasterFormatException("x lies outside raster"); |
| 462 | } |
| 463 | if (y < this.minY) { |
| 464 | throw new RasterFormatException("y lies outside raster"); |
| 465 | } |
| 466 | if ((x+width < x) || (x+width > this.minX + this.width)) { |
| 467 | throw new RasterFormatException("(x + width) is outside raster"); |
| 468 | } |
| 469 | if ((y+height < y) || (y+height > this.minY + this.height)) { |
| 470 | throw new RasterFormatException("(y + height) is outside raster"); |
| 471 | } |
| 472 | |
| 473 | SampleModel sm; |
| 474 | |
| 475 | if (bandList != null) |
| 476 | sm = sampleModel.createSubsetSampleModel(bandList); |
| 477 | else |
| 478 | sm = sampleModel; |
| 479 | |
| 480 | int deltaX = x0 - x; |
| 481 | int deltaY = y0 - y; |
| 482 | |
| 483 | return new IntegerInterleavedRaster(sm, |
| 484 | dataBuffer, |
| 485 | new Rectangle(x0,y0,width,height), |
| 486 | new Point(sampleModelTranslateX+deltaX, |
| 487 | sampleModelTranslateY+deltaY), |
| 488 | this); |
| 489 | } |
| 490 | |
| 491 | |
| 492 | /** |
| 493 | * Creates a subraster given a region of the raster. The x and y |
| 494 | * coordinates specify the horizontal and vertical offsets |
| 495 | * from the upper-left corner of this raster to the upper-left corner |
| 496 | * of the subraster. A subset of the bands of the parent raster may |
| 497 | * be specified. If this is null, then all the bands are present in the |
| 498 | * subRaster. Note that the subraster will reference the same |
| 499 | * DataBuffer as the parent raster, but using different offsets. |
| 500 | * @param x X offset. |
| 501 | * @param y Y offset. |
| 502 | * @param width Width (in pixels) of the subraster. |
| 503 | * @param height Height (in pixels) of the subraster. |
| 504 | * @param x0 Translated X origin of the subRaster. |
| 505 | * @param y0 Translated Y origin of the subRaster. |
| 506 | * @param bandList Array of band indices. |
| 507 | * @exception RasterFormatException |
| 508 | * if the specified bounding box is outside of the parent raster. |
| 509 | */ |
| 510 | public Raster createChild (int x, int y, |
| 511 | int width, int height, |
| 512 | int x0, int y0, |
| 513 | int bandList[]) { |
| 514 | return createWritableChild(x, y, width, height, x0, y0, bandList); |
| 515 | } |
| 516 | |
| 517 | |
| 518 | /** |
| 519 | * Creates a raster with the same band layout but using a different |
| 520 | * width and height, and with new zeroed data arrays. |
| 521 | */ |
| 522 | public WritableRaster createCompatibleWritableRaster(int w, int h) { |
| 523 | if (w <= 0 || h <=0) { |
| 524 | throw new RasterFormatException("negative "+ |
| 525 | ((w <= 0) ? "width" : "height")); |
| 526 | } |
| 527 | |
| 528 | SampleModel sm = sampleModel.createCompatibleSampleModel(w,h); |
| 529 | |
| 530 | return new IntegerInterleavedRaster(sm, new Point(0,0)); |
| 531 | } |
| 532 | |
| 533 | /** |
| 534 | * Creates a raster with the same data layout and the same |
| 535 | * width and height, and with new zeroed data arrays. If |
| 536 | * the raster is a subraster, this will call |
| 537 | * createCompatibleRaster(width, height). |
| 538 | */ |
| 539 | public WritableRaster createCompatibleWritableRaster() { |
| 540 | return createCompatibleWritableRaster(width,height); |
| 541 | } |
| 542 | |
| 543 | /** |
| 544 | * Verify that the layout parameters are consistent with |
| 545 | * the data. If strictCheck |
| 546 | * is false, this method will check for ArrayIndexOutOfBounds conditions. If |
| 547 | * strictCheck is true, this method will check for additional error |
| 548 | * conditions such as line wraparound (width of a line greater than |
| 549 | * the scanline stride). |
| 550 | * @return String Error string, if the layout is incompatible with |
| 551 | * the data. Otherwise returns null. |
| 552 | */ |
| 553 | private void verify (boolean strictCheck) { |
| 554 | int maxSize = 0; |
| 555 | int size; |
| 556 | |
| 557 | size = (height-1)*scanlineStride + (width-1) + dataOffsets[0]; |
| 558 | if (size > maxSize) { |
| 559 | maxSize = size; |
| 560 | } |
| 561 | if (data.length < maxSize) { |
| 562 | throw new RasterFormatException("Data array too small (should be "+ |
| 563 | maxSize |
| 564 | +" but is "+data.length+" )"); |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | public String toString() { |
| 569 | return new String ("IntegerInterleavedRaster: width = "+width |
| 570 | +" height = " + height |
| 571 | +" #Bands = " + numBands |
| 572 | +" xOff = "+sampleModelTranslateX |
| 573 | +" yOff = "+sampleModelTranslateY |
| 574 | +" dataOffset[0] "+dataOffsets[0]); |
| 575 | } |
| 576 | |
| 577 | // /** |
| 578 | // * For debugging... prints a region of a one-band IntegerInterleavedRaster |
| 579 | // */ |
| 580 | // public void print(int x, int y, int w, int h) { |
| 581 | // // REMIND: Only works for 1 band! |
| 582 | // System.out.println(this); |
| 583 | // int offset = dataOffsets[0] + y*scanlineStride + x*pixelStride; |
| 584 | // int off; |
| 585 | // for (int yoff=0; yoff < h; yoff++, offset += scanlineStride) { |
| 586 | // off = offset; |
| 587 | // System.out.print("Line "+(sampleModelTranslateY+y+yoff)+": "); |
| 588 | // for (int xoff = 0; xoff < w; xoff++, off+= pixelStride) { |
| 589 | // System.out.print(Integer.toHexString(data[off])+" "); |
| 590 | // } |
| 591 | // System.out.println(""); |
| 592 | // } |
| 593 | // } |
| 594 | |
| 595 | } |