| gvSIG desktop 1

	 *  (non-Javadoc)

	 * @see org.gvsig.raster.dataset.RasterDataset#readBlock(int, int, int)

	 */

	public Object readBlock(int pos, int blockHeight) throws InvalidSetViewException, FileNotOpenException, RasterDriverException {

		if(pos < 0)

			throw new InvalidSetViewException("Request out of grid");

		if((pos + blockHeight) > file.height)

			blockHeight = Math.abs(file.height - pos);

		Point2D begin = rasterToWorld(new Point2D.Double(0, pos));

		Point2D end = rasterToWorld(new Point2D.Double(file.width, pos + blockHeight));

		int[] readBandsFromECW = new int[file.numBands];

		for(int i = 0; i < file.numBands; i++)

			readBandsFromECW[i] = i;

		byte[][][] buf = new byte[file.numBands][blockHeight][file.width];

		Extent e = new Extent(begin.getX(), begin.getY(), end.getX(), end.getY());

		try {

			int[] value = new int[file.width];

			file.setView(file.numBands, readBandsFromECW, e.minX(), e.maxY(), e.maxX(), e.minY(), file.width, 1);

			if(file.numBands <= 3) {

				for (int row = 0; row < blockHeight; row++) {

					file.readLineRGBA(value);

					switch(getDataType()) {

					case IBuffer.TYPE_BYTE: 

						for(int col = 0; col < file.width; col ++) {

							buf[0][row][col] = (byte)(((value[col] & 0x00ff0000) >> 16) & 0xff);

							buf[1][row][col] = (byte)(((value[col] & 0x0000ff00) >> 8) & 0xff);

							buf[2][row][col] = (byte)((value[col] & 0x000000ff) & 0xff);

						}

						break;

					}

				}

			} else {

				//TODO: FUNCIONALIDAD: file.numBands > 3

			}

			//TODO: FUNCIONALIDAD: Ecw con otro tipo de dato != Byte

		} catch (JNCSFileNotOpenException e1) {

			throw new FileNotOpenException("Error en jecw: JNCSFileNotOpenException");

		} catch (JNCSInvalidSetViewException e1) {

			throw new FileNotOpenException("Error en jecw: JNCSInvalidSetViewException");

		} catch (JNCSException e1) {

			throw new RasterDriverException("Error la lectura de datos ecw");

		}

		return buf;

	}

	/*