1350 */
1351 public int getTileWidth() {
1352 return raster.getWidth();
1353 }
1354
1355 /**
1356 * Returns the tile height in pixels.
1357 * @return the tile height in pixels.
1358 */
1359 public int getTileHeight() {
1360 return raster.getHeight();
1361 }
1362
1363 /**
1364 * Returns the x offset of the tile grid relative to the origin,
1365 * For example, the x coordinate of the location of tile
1366 * (0, 0). This is always zero.
1367 * @return the x offset of the tile grid.
1368 */
1369 public int getTileGridXOffset() {
1370 return raster.getSampleModelTranslateX();
1371 }
1372
1373 /**
1374 * Returns the y offset of the tile grid relative to the origin,
1375 * For example, the y coordinate of the location of tile
1376 * (0, 0). This is always zero.
1377 * @return the y offset of the tile grid.
1378 */
1379 public int getTileGridYOffset() {
1380 return raster.getSampleModelTranslateY();
1381 }
1382
1383 /**
1384 * Returns tile ({@code tileX}, {@code tileY}). Note
1385 * that {@code tileX} and {@code tileY} are indices
1386 * into the tile array, not pixel locations. The {@code Raster}
1387 * that is returned is live, which means that it is updated if the
1388 * image is changed.
1389 * @param tileX the x index of the requested tile in the tile array
1390 * @param tileY the y index of the requested tile in the tile array
1391 * @return a {@code Raster} that is the tile defined by the
1392 * arguments {@code tileX} and {@code tileY}.
1393 * @exception ArrayIndexOutOfBoundsException if both
1394 * {@code tileX} and {@code tileY} are not
1395 * equal to 0
1396 */
1397 public Raster getTile(int tileX, int tileY) {
1398 if (tileX == 0 && tileY == 0) {
1399 return raster;
1400 }
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1350 */
1351 public int getTileWidth() {
1352 return raster.getWidth();
1353 }
1354
1355 /**
1356 * Returns the tile height in pixels.
1357 * @return the tile height in pixels.
1358 */
1359 public int getTileHeight() {
1360 return raster.getHeight();
1361 }
1362
1363 /**
1364 * Returns the x offset of the tile grid relative to the origin,
1365 * For example, the x coordinate of the location of tile
1366 * (0, 0). This is always zero.
1367 * @return the x offset of the tile grid.
1368 */
1369 public int getTileGridXOffset() {
1370 /*
1371 * Given (source: javax.media.jai.PlanarImage.tileXToX(int)):
1372 *
1373 * x = (tileX * tileWidth) + tileGridXOffset
1374 *
1375 * We get:
1376 *
1377 * tileGridXOffset = x - (tileX * tileWidth)
1378 *
1379 * Substituting x = minX and tileX = minTileX:
1380 *
1381 * tileGridXOffset = minX - (minTileX * tileWidth)
1382 *
1383 * Substituting default BufferedImage method implementations:
1384 *
1385 * tileGridXOffset = raster.getMinX() - (0 * raster.getWidth())
1386 *
1387 * Result should always be zero, but we nevertheless delegate to
1388 * raster.getMinX() for consistency with default implementation
1389 * of related methods in BufferedImage.
1390 */
1391 return raster.getMinX();
1392 }
1393
1394 /**
1395 * Returns the y offset of the tile grid relative to the origin,
1396 * For example, the y coordinate of the location of tile
1397 * (0, 0). This is always zero.
1398 * @return the y offset of the tile grid.
1399 */
1400 public int getTileGridYOffset() {
1401 return raster.getMinY();
1402 }
1403
1404 /**
1405 * Returns tile ({@code tileX}, {@code tileY}). Note
1406 * that {@code tileX} and {@code tileY} are indices
1407 * into the tile array, not pixel locations. The {@code Raster}
1408 * that is returned is live, which means that it is updated if the
1409 * image is changed.
1410 * @param tileX the x index of the requested tile in the tile array
1411 * @param tileY the y index of the requested tile in the tile array
1412 * @return a {@code Raster} that is the tile defined by the
1413 * arguments {@code tileX} and {@code tileY}.
1414 * @exception ArrayIndexOutOfBoundsException if both
1415 * {@code tileX} and {@code tileY} are not
1416 * equal to 0
1417 */
1418 public Raster getTile(int tileX, int tileY) {
1419 if (tileX == 0 && tileY == 0) {
1420 return raster;
1421 }
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