gvsig-raster / org.gvsig.raster.gdal / trunk / org.gvsig.raster.gdal / org.gvsig.raster.gdal.io / src / main / java / org / gvsig / jgdal / GdalRasterBand.java @ 4182
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.jgdal; |
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import java.util.Vector; |
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import org.gdal.gdal.Band; |
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import org.gdal.gdal.ColorTable; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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/**
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* Representa a una banda simple de la im?gen o canal.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com).<BR> Equipo de desarrollo gvSIG.<BR> http://www.gvsig.gva.es
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* @version 0.0
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* @link http://www.gvsig.gva.es
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*/
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public class GdalRasterBand { |
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public static final Logger logger = LoggerFactory.getLogger(GdalRasterBand.class); |
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private boolean hasNoDataValue = false; |
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private Band band;
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public GdalRasterBand(Band band) {
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this.band = band;
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} |
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/**
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* Lee datos de la banda de la imagen
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*
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* @return Devuelve un vector de bytes con el trozo de raster le?do.
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* @param nXOff El desplazamiento del pixel desde la esquina superior derecha
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* de la banda accedida.
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* @param nYOff El desplazamiento de l?nea desde la esquina superior derecha
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* de la banda accedida.
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* @param nXSize Ancho de la regi?n en pixels de la banda que ser? accedida
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* @param nYSize Altura de la regi?n en l?neas de la banda que ser? accedida
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* @param bufXSize Ancho del buffer donde la regi?n de la im?gen ser? guardada
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* @param bufYSize Altura del buffer donde la regi?n de la im?gen ser? guardada
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* En caso de que bufXSize o bufYSize sean menores que 1, pasan a tener el mismo valor que
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* nXSize y nYSize respectivamente para evitar buffers con tama?o 0.
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* @param eBufType
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*/
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public GdalBuffer readRaster(int nXOff, int nYOff, int nXSize, int nYSize, |
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int bufXSize, int bufYSize, |
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int eBufType)throws GdalException { |
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if ((nXOff<0) || (nXOff > getRasterBandXSize()) || (nYOff < 0) || (nYOff > getRasterBandYSize())) |
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throw new GdalException("Desplazamiento de la ventana fuera de rango."); |
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if ((nXSize < 1) || (nXSize > getRasterBandXSize()) || (nYSize<1) || (nYSize > getRasterBandYSize())) |
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throw new GdalException("Tama?o de ventana incorrecto."); |
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if (((nXSize + nXOff) > (getRasterBandXSize())) || ((nYSize + nYOff) > (getRasterBandYSize()))){
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throw new GdalException("Posicion de la ventana incorrecta."); |
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} |
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if ((eBufType < 1) || (eBufType > 11)) |
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throw new GdalException("Tipo de datos incorrecto."); |
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if (bufXSize < 1) |
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bufXSize = nXSize; |
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if (bufYSize < 1) |
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bufYSize = nYSize; |
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GdalBuffer buf = new GdalBuffer();
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int i = 0; |
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switch(eBufType) {
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case 0: |
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i = 0;
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break;
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case 1: |
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buf.reservaByte(bufXSize * bufYSize); |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffByte);
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break;
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case 2: |
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case 3: |
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case 8: |
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buf.reservaShort(bufXSize * bufYSize); |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffShort);
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break;
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case 4: |
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case 5: |
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case 9: |
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buf.reservaInt(bufXSize * bufYSize); |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffInt);
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break;
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case 6: |
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case 10: |
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buf.reservaFloat(bufXSize * bufYSize); |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffFloat);
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break;
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case 7: |
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case 11: |
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buf.reservaDouble(bufXSize * bufYSize); |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffDouble);
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break;
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case 12: |
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i = 0;
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break;
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} |
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if(i>=0) |
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return buf;
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else
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return null; |
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} |
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/**
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* Escribe datos en la banda de la imagen
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*
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* @param nXOff El desplazamiento del pixel desde la esquina superior derecha
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* de la banda accedida.
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* @param nYOff El desplazamiento de l?nea desde la esquina superior derecha
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* de la banda accedida.
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* @param nXSize Ancho de la regi?n en pixels de la banda que ser? accedida
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* @param nYSize Altura de la regi?n en l?neas de la banda que ser? accedida
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* @param BufXSize Ancho del buffer donde la regi?n de la im?gen ser? guardada
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* @param BufYSize Altura del buffer donde la regi?n de la im?gen ser? guardada
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* @param eBufType
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*/
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public void writeRaster(int nXOff, int nYOff, int nXSize, int nYSize, GdalBuffer buf, int eBufType)throws GdalException { |
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GdalBuffer buffer = new GdalBuffer();
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if ((nXOff < 0) || (nXOff > getRasterBandXSize()) || (nYOff < 0) || (nYOff > getRasterBandYSize())) |
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throw new GdalException("Desplazamiento de la ventana fuera de rango."); |
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if ((nXSize < 1) || (nXSize > getRasterBandXSize()) || (nYSize < 1) || (nYSize > getRasterBandYSize())) |
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throw new GdalException("Tama?o de ventana incorrecto."); |
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if (((nXSize + nXOff) > (getRasterBandXSize())) || ((nYSize + nYOff) > (getRasterBandYSize())))
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throw new GdalException("Posicion de la ventana incorrecta."); |
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if ((eBufType < 1) || (eBufType > 11)) |
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throw new GdalException("Tipo de datos incorrecto."); |
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if (buf == null) |
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throw new GdalException("Buffer incorrecto"); |
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switch(eBufType) {
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case 0: |
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return;
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case 1: |
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buffer.buffByte = buf.buffByte; |
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break;
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case 2: |
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case 3: |
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case 8: |
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buffer.buffShort = buf.buffShort; |
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break;
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case 4: |
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case 5: |
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case 9: |
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buffer.buffInt = buf.buffInt; |
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break;
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case 6: |
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case 10: |
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buffer.buffFloat = buf.buffFloat; |
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break;
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case 7: |
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case 11: |
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buffer.buffDouble = buf.buffDouble; |
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break;
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case 12: |
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return;
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} |
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switch(eBufType) {
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case 0: |
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break;
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case 1: |
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this.band.WriteRaster(nXOff, nYOff, nXSize, nYSize, eBufType, buffer.buffByte);
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break;
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case 2: |
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case 3: |
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case 8: |
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this.band.WriteRaster(nXOff, nYOff, nXSize, nYSize, eBufType, buffer.buffShort);
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break;
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case 4: |
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case 5: |
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case 9: |
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this.band.WriteRaster(nXOff, nYOff, nXSize, nYSize, eBufType, buffer.buffInt);
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break;
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case 6: |
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case 10: |
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this.band.WriteRaster(nXOff, nYOff, nXSize, nYSize, eBufType, buffer.buffFloat);
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break;
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case 7: |
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case 11: |
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this.band.WriteRaster(nXOff, nYOff, nXSize, nYSize, eBufType, buffer.buffDouble);
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break;
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case 12: |
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break;
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} |
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} |
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/**
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*Obtiene el tama?o en pixeles de la im?gen en el eje de las X
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*@return Tama?o en pixeles del eje X
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*@throws GdalException
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*/
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public int getRasterBandXSize()throws GdalException { |
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return this.band.GetXSize(); |
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} |
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/**
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*Obtiene el tama?o en pixeles de la im?gen en el eje de las Y
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*@return Tama?o en pixeles del eje Y
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*@throws GdalException
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*/
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public int getRasterBandYSize()throws GdalException { |
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return this.band.GetYSize(); |
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} |
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/**
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* Devuelve el n?mero de overviews que contiene la banda.
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* @return N?mero de overviews
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* @throws GdalException
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*/
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public int getOverviewCount()throws GdalException { |
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return this.band.GetOverviewCount(); |
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} |
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/**
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* Obtiene el overview indicado por el ?ndice "i".
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*
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* @param i indice del overview que se quiere recuperar.
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* @return GdalRasterBand Banda correspondiente al overview selecccionado
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* @throws GdalException
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*/
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public GdalRasterBand getOverview(int i)throws GdalException { |
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Band band_ov; |
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if((i < 0) || (i >= getOverviewCount())) |
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throw new GdalException("El overview seleccionado no existe"); |
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band_ov = this.band.GetOverview(i);
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if (band_ov == null || !(band_ov instanceof Band)) |
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throw new GdalException("No se ha podido obtener el overview"); |
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return new GdalRasterBand(band_ov); |
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} |
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/**
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* Devuelve el tama?o en X del bloque para esa banda
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* @return Tama?o en pixeles del bloque en el eje X
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* @throws GdalException
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*/
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public int getBlockXSize()throws GdalException { |
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return this.band.GetBlockXSize(); |
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} |
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/**
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* Devuelve el tama?o en Y del bloque para esa banda
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* @return Tama?o en pixeles del bloque en el eje Y
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* @throws GdalException
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*/
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public int getBlockYSize()throws GdalException { |
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return this.band.GetBlockYSize(); |
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} |
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/**
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* Devuelve el tipo de datos de la banda
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* @return Tama?o en pixeles del bloque en el eje Y
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* @throws GdalException
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*/
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public int getRasterDataType()throws GdalException { |
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return this.band.getDataType(); |
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} |
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/**
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* Obtiene la tabla de color asociada a la imagen
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*/
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public GdalColorTable getRasterColorTable()throws GdalException { |
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ColorTable ct = this.band.GetColorTable();
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if ((ct == null)) { |
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return null; |
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} |
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return new GdalColorTable(ct); |
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} |
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/**
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* Lee datos de la banda de la im?gen con una paleta asociada
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*
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* @return Devuelve un vector de bytes con el trozo de raster le?do.
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* @param nXOff El desplazamiento del pixel desde la esquina superior derecha
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* de la banda accedida.
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* @param nYOff El desplazamiento de l?nea desde la esquina superior derecha
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* de la banda accedida.
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* @param nXSize Ancho de la regi?n en pixels de la banda que ser? accedida
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* @param nYSize Altura de la regi?n en l?neas de la banda que ser? accedida
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* @param BufXSize Ancho del buffer donde la regi?n de la im?gen ser? guardada
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* @param BufYSize Altura del buffer donde la regi?n de la im?gen ser? guardada
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* En caso de que bufXSize o bufYSize sean menores que 1, pasan a tener el mismo valor que
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* nXSize y nYSize respectivamente para evitar buffers con tama?o 0.
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* @param eBufType
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*/
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public GdalBuffer readRasterWithPalette(int nXOff, int nYOff, int nXSize, int nYSize, |
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int bufXSize, int bufYSize, |
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int eBufType)throws GdalException { |
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if ((nXOff<0) || (nXOff > getRasterBandXSize()) || (nYOff < 0) || (nYOff > getRasterBandYSize())) |
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throw new GdalException("Desplazamiento de la ventana fuera de rango."); |
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if ((nXSize < 1) || (nXSize > getRasterBandXSize()) || (nYSize < 1) || (nYSize > getRasterBandYSize())) |
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throw new GdalException("Tama?o de ventana incorrecto."); |
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if (((nXSize + nXOff) > (getRasterBandXSize())) || ((nYSize + nYOff) > (getRasterBandYSize())))
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throw new GdalException("Posicion de la ventana incorrecta."); |
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|
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if ((eBufType < 1) || (eBufType > 11)) |
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throw new GdalException("Tipo de datos incorrecto."); |
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|
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if (bufXSize < 1) |
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bufXSize = nXSize; |
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|
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if (bufYSize < 1) |
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bufYSize = nYSize; |
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|
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|
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GdalBuffer buf = new GdalBuffer();
|
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int i = 0; |
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|
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switch(eBufType) {
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case 0: |
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i = 0;
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break;
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case 1: |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffByte);
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break;
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case 2: |
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case 3: |
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case 8: |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffShort);
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break;
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case 4: |
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case 5: |
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case 9: |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffInt);
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break;
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case 6: |
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case 10: |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffFloat);
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break;
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case 7: |
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case 11: |
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i = this.band.ReadRaster(nXOff, nYOff, nXSize, nYSize, bufXSize, bufYSize, eBufType, buf.buffDouble);
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break;
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case 12: |
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i = 0;
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break;
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} |
| 399 |
|
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|
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if(i>0) |
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return buf;
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else
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return null; |
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} |
| 406 |
|
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/**
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| 408 |
*Devuelve el valor de NoData
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*/
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public double getRasterNoDataValue()throws GdalException { |
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|
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Double[] aux = new Double[1]; |
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this.band.GetNoDataValue(aux);
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return aux[0]; |
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} |
| 416 |
|
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/**
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* Obtiene el valorDevuelve el valor de NoData
|
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*/
|
| 420 |
public boolean existsNoDataValue()throws GdalException { |
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return this.hasNoDataValue ; |
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} |
| 423 |
|
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public void setRasterNoDataValue(double val){ |
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this.hasNoDataValue = true; |
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this.band.SetNoDataValue(val);
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} |
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|
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/**
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* Obtiene un array de Strings con los metadatos
|
| 432 |
*
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* @throws GdalException
|
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* @return Array de Strings que corresponden a los metadatos que ofrece la im?gen
|
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*/
|
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|
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public String[] getMetadata()throws GdalException { |
| 438 |
|
| 439 |
@SuppressWarnings("unchecked") |
| 440 |
Vector<String> aux = this.band.GetMetadata_List(); |
| 441 |
String[] res = aux.toArray(new String[0]); |
| 442 |
if(res == null) |
| 443 |
return new String[0]; |
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else return res; |
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} |
| 446 |
|
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/**
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| 448 |
* Obtiene identificador que representa el tipo de banda de color.
|
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* @return identificador del tipo de banda de color
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* @throws GdalException
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*/
|
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|
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public int getRasterColorInterpretation()throws GdalException { |
| 454 |
|
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int bandType = this.band.GetColorInterpretation(); |
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return bandType;
|
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} |
| 458 |
|
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|
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/**
|
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* Asigna la interpretaci?n de color de la banda.
|
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* Con algunos formatos no es posible modificar la interpretaci?n de color,
|
| 463 |
* tales como tiff y jpg. En el caso de tif, no hay error pero tampoco se
|
| 464 |
* produce el cambio en la interpretaci?n. En el caso de jpg, gdal lanza un error.
|
| 465 |
* 0 = "Undefined"
|
| 466 |
* 1 = "Gray";
|
| 467 |
* 2 = "Palette";
|
| 468 |
* 3 = "Red";
|
| 469 |
* 4 = "Green";
|
| 470 |
* 5 = "Blue";
|
| 471 |
* 6 = "Alpha";
|
| 472 |
* 7 = "Hue";
|
| 473 |
* 8 = "Saturation";
|
| 474 |
* 9 = "Lightness";
|
| 475 |
* 10 = "Cyan";
|
| 476 |
* 11 = "Magenta";
|
| 477 |
* 12 = "Yellow";
|
| 478 |
* 13 = "Black";
|
| 479 |
* 14 = "YCbCr_Y";
|
| 480 |
* 15 = "YCbCr_Cb";
|
| 481 |
* 16 = "YCbCr_Cr";
|
| 482 |
* @param bandType
|
| 483 |
* @throws GdalException
|
| 484 |
*/
|
| 485 |
public void setRasterColorInterpretation(int bandType) throws GdalException{ |
| 486 |
|
| 487 |
if ((bandType < 0) || (bandType > 16)){ |
| 488 |
throw new GdalException("Tipo de banda incorrecto"); |
| 489 |
} |
| 490 |
|
| 491 |
@SuppressWarnings("unused") |
| 492 |
int err = this.band.SetColorInterpretation(bandType); |
| 493 |
|
| 494 |
} |
| 495 |
|
| 496 |
} |