root / branches / v10 / libraries / libjni-gdal / src / es / gva / cit / jgdal / GdalRasterBand.java @ 10988
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/**********************************************************************
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* $Id: GdalRasterBand.java 10988 2007-03-30 11:54:34Z nacho $
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*
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* Name: GdalRasterBand.java
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* Project: JGDAL. Interface java to gdal (Frank Warmerdam).
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* Purpose: Basic Funcions about raster bands.
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* Author: Nacho Brodin, brodin_ign@gva.es
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*
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**********************************************************************/
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package es.gva.cit.jgdal; |
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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 <brodin_ign@gva.es>.<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 extends JNIBase{ |
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private native long getOverviewNat(long cPtr,int i); |
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private native long getRasterColorTableNat(long cPtr); |
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private native GdalBuffer readRasterNat(long cPtr, |
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int nXOff, int nYOff, int nXSize, int nYSize, |
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int BufXSize, int BufYSize, |
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int eBufType);
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private native GdalBuffer readRasterWithPaletteNat(long cPtr, |
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int nXOff, int nYOff, int nXSize, int nYSize, |
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int BufXSize, int BufYSize, |
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int eBufType);
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private native void writeRasterNat( long cPtr, |
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int nXOff, int nYOff, int nXSize, int nYSize, |
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GdalBuffer buffer, |
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int eBufType);
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private native double getRasterNoDataValueNat(long cPtr); |
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private native String[] getMetadataNat(long cPtr,String pszDomain); |
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private native int getRasterColorInterpretationNat(long cPtr); |
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/**
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* Asigna el identificador de la banda
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*/
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public GdalRasterBand(long cPtr) { |
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this.cPtr=cPtr;
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} |
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/**
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* Lee datos de la banda de la im?gen
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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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* @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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GdalBuffer buffer = readRasterNat(cPtr, nXOff, nYOff, nXSize, nYSize, BufXSize, BufYSize, eBufType); |
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if(buffer!=null) |
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return buffer;
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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 im?gen
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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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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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writeRasterNat(cPtr, nXOff, nYOff, nXSize, nYSize, buffer, eBufType); |
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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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String msg1="Error en getRasterBandXSize(). La llamada getRasterBand no tuvo exito"; |
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String msg2="Tama?o de banda erroneo devuelto por GetRasterBandXSize"; |
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return baseSimpleFunctions(0,msg1,msg2); |
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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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String msg1="Error en getRasterBandYSize(). La llamada getRasterBand no tuvo exito"; |
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String msg2="Tama?o de banda erroneo devuelto por GetRasterBandYSize"; |
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return baseSimpleFunctions(1,msg1,msg2); |
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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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String msg1="Error en getOverviewCount(). La llamada getRasterBand no tuvo exito"; |
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String msg2="Error al obtener el n?mero de overviews"; |
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return baseSimpleFunctions(2,msg1,msg2); |
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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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long cPtr_ov;
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if(i<0 && i>=this.getOverviewCount()) |
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throw new GdalException("El overview seleccionado no existe"); |
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cPtr_ov = getOverviewNat(cPtr,i); |
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return new GdalRasterBand(cPtr_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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String msg1="Error en getBlockXSize(). La llamada getRasterBand no tuvo exito"; |
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String msg2="Tama?o de bloque erroneo devuelto por GetBlockXSize"; |
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return baseSimpleFunctions(3,msg1,msg2); |
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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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String msg1="Error en getBlockXSize(). La llamada getRasterBand no tuvo exito"; |
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String msg2="Tama?o de bloque erroneo devuelto por GetBlockYSize"; |
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return baseSimpleFunctions(4,msg1,msg2); |
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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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String msg1="Error en getRasterDataType(). La llamada getRasterBand no tuvo exito"; |
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String msg2="Tipo de dato devuelto por GetRasterDataType erroneo"; |
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return baseSimpleFunctions(9,msg1,msg2); |
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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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GdalColorTable gct = null;
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long l = getRasterColorTableNat(cPtr);
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if(l > 0) |
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gct = new GdalColorTable(l);
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else
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return null; |
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return gct;
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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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* @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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GdalBuffer buffer = readRasterWithPaletteNat(cPtr, nXOff, nYOff, nXSize, nYSize, BufXSize, BufYSize, eBufType); |
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if(buffer!=null) |
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return buffer;
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else
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return null; |
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} |
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/**
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*Devuelve el valor de NoData
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*/
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public double getRasterNoDataValue()throws GdalException { |
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return getRasterNoDataValueNat(cPtr);
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} |
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/**
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* Obtiene un array de Strings con los metadatos
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*
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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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public String[] getMetadata()throws GdalException { |
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String[] res = getMetadataNat(cPtr,null); |
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if(res == null) |
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return new String[0]; |
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else return res; |
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} |
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/**
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* 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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public int getRasterColorInterpretation()throws GdalException { |
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int bandType = getRasterColorInterpretationNat(cPtr);
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return bandType;
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} |
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} |