svn-gvsig-desktop / trunk / libraries / libRaster / src / org / gvsig / raster / buffer / RasterBuffer.java @ 20759
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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) 2007 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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package org.gvsig.raster.buffer; |
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import java.io.FileNotFoundException; |
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import org.gvsig.raster.RasterLibrary; |
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import org.gvsig.raster.buffer.cache.RasterCache; |
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import org.gvsig.raster.buffer.cache.RasterReadOnlyBuffer; |
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import org.gvsig.raster.dataset.IBuffer; |
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import org.gvsig.raster.dataset.IRasterDataSource; |
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import org.gvsig.raster.dataset.NotSupportedExtensionException; |
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import org.gvsig.raster.dataset.io.RasterDriverException; |
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import org.gvsig.raster.datastruct.Histogram; |
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import org.gvsig.raster.process.RasterTask; |
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import org.gvsig.raster.process.RasterTaskQueue; |
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import org.gvsig.raster.util.RasterUtilities; |
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/**
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* Rectangulo de pixeles. Para cada tipo de datos java hay un buffer distinto donde cada elemento es
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* accedido de la siguiente forma: [banda][fila][columna]
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* m[1][2][0] = cte;-> Sustituye el elemento de la fila 2 de la banda 1 columna 0
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* m[1][0] = array; -> Sustituye la fila 0 de la banda 1
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* m[0] = matriz cuadrada; -> Sustituye la banda entera.
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*
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*/
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public abstract class RasterBuffer implements IBuffer { |
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public static final int INTERPOLATION_PROCESS = 0; |
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public static final int HISTOGRAM_PROCESS = 1; |
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protected boolean[] cancel = new boolean[1]; |
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public double noDataValue = -99999; |
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protected int progressHistogram = 0; |
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protected int progressInterpolation = 0; |
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protected boolean canceled = false; |
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protected int width; |
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protected int height; |
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protected int nBands; |
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protected int dataType; |
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/**
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* Variable est?tica que si est? a false desactiva el uso de cach?. Puede ser usada por un cliente
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* para cargar siempre los datos en memoria. independientemente de su tama?o.
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*/
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public static boolean cacheOn = true; |
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/**
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* Fuerza la carga de los datos en cach? independientemente de su tama?o. Su
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* uso suele ser util solo para depuraci?n. Su valor por defecto y recomendado
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* es siempre false.
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*/
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public static boolean forceToLoadInCache = false; |
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/**
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* Fuerza la carga de los datos en cach? de solo lectura independientemente de su tama?o. Su
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* uso suele ser util solo para depuraci?n. Su valor por defecto y recomendado
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* es siempre false.
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*/
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public static boolean forceToLoadInReadOnlyCache = false; |
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/**
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* Valor con el que se rellena una banda no valida del buffer. Una banda no valida es la que
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* no tiene datos asignados y tampoco puede ser null. Todas las bandas no validas de un buffer
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* apuntan por referencia a la misma banda.
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*/
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protected double notValidValue = 0D; |
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private BufferInterpolation interp = null; |
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/**
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* Proceso del cual se devuelve el porcentaje cuando este es solicitado
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*/
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private int process = HISTOGRAM_PROCESS; |
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/**
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* Genera instancias del buffer de datos adecuado al tama?o del raster. Si no hay muchos datos
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* (menos de cacheMemorySize) crear? un buffer en memoria. Si hay m?s de esta cantidad
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* entonces crearemos un buffer cacheado (RasterCache). A partir de la cantidad se?alada
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* por multicacheMemorySize haremos un buffer cacheado donde cada p?gina no ocupa todo
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* el ancho del raster ya que este ser? muy grande. La gesti?n de una cache donde cada
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* pagina ha de partir una l?nea lleva una complejidad a?adida.
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*
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* @param dataType Tipo de dato
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* @param width Ancho
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* @param height Alto
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* @param bandNr Banda
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* @param flag En caso de buffers de memoria este flag a true significa que se reserva la memoria
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* para el buffer de forma normal y si est? a false no se reserva por lo que la reserva deber? ser
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* posterior.
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* @return Objeto RasterBuffer
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* @throws RasterDriverException
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* @throws NotSupportedExtensionException
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* @throws FileNotFoundException
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*/
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public static RasterBuffer getBuffer(int dataType, int width, int height, int bandNr, boolean malloc) |
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/*throws FileNotFoundException, NotSupportedExtensionException, RasterDriverException*/{
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//Opci?n de cachear siempre activada (Solo DEBUG)
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if(forceToLoadInCache)
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return new RasterCache(dataType, width, height, bandNr); |
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if(forceToLoadInReadOnlyCache){
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return new RasterReadOnlyBuffer(dataType, width, height, bandNr); |
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} |
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if(cacheOn){
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long size = (RasterUtilities.getBytesFromRasterBufType(dataType) * width * height * bandNr) / 1024; |
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long ms1 = RasterLibrary.cacheSize * 1024; |
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if(size <= ms1)
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return new RasterMemoryBuffer(dataType, width, height, bandNr, malloc); |
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else
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return new RasterCache(dataType, width, height, bandNr); |
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}else
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return new RasterMemoryBuffer(dataType, width, height, bandNr, malloc); |
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} |
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/**
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* Genera una instancia del buffer de solo lectura. Este buffer consta de una cache y unos apuntadores
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* a las p?ginas en disco. Cuando se accede a los datos se carga en memoria la p?gina pedida.
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*
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* @param dataType Tipo de dato
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* @param width Ancho
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* @param height Alto
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* @param bandNr Banda
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*/
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public static RasterBuffer getReadOnlyBuffer(int dataType, int width, int height, int bandNr) { |
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return new RasterReadOnlyBuffer(dataType, width, height, bandNr); |
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} |
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/**
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* Genera una instancia del buffer de solo lectura. Este buffer consta de una cache y unos apuntadores
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* a las p?ginas en disco. Cuando se accede a los datos se carga en memoria la p?gina pedida.
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*
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* @param dataType Tipo de dato
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* @param width Ancho
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* @param height Alto
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* @param bandNr Banda
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* @param flag En caso de buffers de memoria este flag a true significa que se reserva la memoria
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* para el buffer de forma normal y si est? a false no se reserva por lo que la reserva deber? ser
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* posterior.
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*/
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public static RasterBuffer getMemoryBuffer(int dataType, int width, int height, int bandNr, boolean malloc) { |
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return new RasterMemoryBuffer(dataType, width, height, bandNr, malloc); |
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} |
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/**
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* Devuelve true si el tama?o del dataset es menor que el de la cach? y false
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* si no lo es.
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* @param datasource Fuente de datos
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* @return true si podemos cargar en memoria el raster
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*/
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public static boolean loadInMemory(IRasterDataSource datasource) { |
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return (datasource.getFileSize() < (RasterLibrary.cacheSize * 1048576)); |
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} |
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/**
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* Dadas unas coordenadas pixel y un n?mero de bandas, esta funci?n comprueba si
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* el tama?o de ventana que va a generarse supera el tama?o de la cach?
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* @param coords Coordenadas pixel del raster
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* @param bands N?mero de bandas
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* @param ds
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* @return true si la ventana supera el tama?o de la cach? o false si no lo supera.
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*/
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public static boolean isBufferTooBig(double[] coords, int bands) { |
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int w = (int)Math.abs(coords[2] - coords[0]); |
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int h = (int)Math.abs(coords[3] - coords[1]); |
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long windowSize = w * h * bands;
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return (windowSize > (RasterLibrary.cacheSize * 1048576)); |
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} |
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/**
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* Reserva de memoria para el rasterbuf
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* @param dataType Tipo de dato
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* @param width Ancho
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* @param height Alto
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* @param bandNr Numero de bandas
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* @param orig
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*/
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public abstract void malloc(int dataType, int width, int height, int bandNr); |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getWidth()
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*/
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public int getWidth() { |
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return width;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getHeight()
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*/
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public int getHeight() { |
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return height;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getBandCount()
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*/
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public int getBandCount() { |
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return nBands;
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} |
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/**
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* Obtiene el tipo de dato. Los tipos de dato posibles est?n definidos en IRaster.
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* @return tipo de datos
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*/
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public int getDataType() { |
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return dataType;
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} |
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/**
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* Asigna el tipo de dato. Los tipos de dato posibles est?n definidos en IRaster.
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* @param dataType Tipo de dato del buffer
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*/
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public void setDataType(int dataType) { |
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this.dataType = dataType;
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} |
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/**
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* Obtiene el tama?o del tipo de dato en bytes
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* @return Tipo de dato
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*/
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public int getDataSize() { |
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if (dataType == TYPE_BYTE) {
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return 1; |
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} else if ((dataType == TYPE_SHORT) | (dataType == TYPE_USHORT)) { |
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return 2; |
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} else if (dataType == TYPE_INT) { |
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return 4; |
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}else if (dataType == TYPE_FLOAT) { |
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return 8; |
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}else if (dataType == TYPE_DOUBLE) { |
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return 16; |
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} |
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return 0; |
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} |
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/**
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* Obtiene el tama?o del buffer
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* @return tama?o del buffer
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*/
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public long sizeof() { |
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return getDataSize() * width * height * nBands;
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} |
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/**
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* Replica la banda de una posici?n sobre otra. Si la banda de destino no existe
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* se crea nueva. Si la posici?n de la banda de destino est? intercalada entre bandas
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* que ya existen las otras se desplazan hacia abajo, NO se machacan los datos de ninguna.
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* Los datos se replican por referencia por lo que al modificar la banda original las
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* del resto quedar?n afectadas.
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* @param orig. Posici?n de la banda de origen.
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* @param dest. Posici?n de la banda destino
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*/
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public abstract void replicateBand(int orig, int dest); |
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/**
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* Cambia bandas de posici?n. Las posiciones deben existir como bandas del raster.
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* Cada elemento del array representa una banda existente en el buffer (de longitud
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* rasterBuf.length) y el valor contenido dentro la banda que le corresponde. Por ejemplo
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* si pasamos un array {1, 0, 3, 2} significa que el buffer tiene cuatro bandas y que
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* cambiamos la 0 por la 1 y la 2 por la 3. Un array {0, 1, 2, 3} en el mismo
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* caso no producir?a nig?n cambio.
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*
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* Si quisieramos asignar en un buffer monobanda su banda a la segunda posici?n habria
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* que insertar una vacia, por ejemplo con addBandFloat(0, null) se insertaria una
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* banda nula en la posici?n 0 y la banda que estaba en la 0 pasar?a a la segunda.
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*
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*/
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public abstract void switchBands(int[] bandPosition); |
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/**
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* Convierte un tipo de dato a cadena
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* @param type Tipo de dato
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* @return cadena que representa el tipo de dato
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*/
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public static String typesToString(int type) { |
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switch (type) {
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case RasterBuffer.TYPE_IMAGE:
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return new String("Image"); |
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case RasterBuffer.TYPE_BYTE:
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return new String("Byte"); |
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case RasterBuffer.TYPE_DOUBLE:
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return new String("Double"); |
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case RasterBuffer.TYPE_FLOAT:
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return new String("Float"); |
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case RasterBuffer.TYPE_INT:
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return new String("Integer"); |
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case RasterBuffer.TYPE_USHORT:
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case RasterBuffer.TYPE_SHORT:
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return new String("Short"); |
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} |
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return null; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.dataset.IBuffer#isInside(int, int)
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*/
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public boolean isInside(int x, int y) { |
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if (x < 0 || y < 0 || x >= getWidth() || y >= getHeight()) |
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return false; |
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return true; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getNoDataValue()
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*/
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public double getNoDataValue() { |
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return noDataValue;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getByteNoDataValue()
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*/
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public byte getByteNoDataValue() { |
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return (byte)noDataValue; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getShortNoDataValue()
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*/
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public short getShortNoDataValue(){ |
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return (short)noDataValue; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getIntNoDataValue()
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*/
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public int getIntNoDataValue(){ |
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return (int)noDataValue; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getFloatNoDataValue()
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*/
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public float getFloatNoDataValue(){ |
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return (float)noDataValue; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#setNoDataValue(double)
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*/
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public void setNoDataValue(double nd){ |
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noDataValue = nd; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#getNotValidValue()
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*/
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public double getNotValidValue(){ |
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return notValidValue;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#setNotValidValue(java.lang.Object)
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*/
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public void setNotValidValue(double value){ |
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this.notValidValue = value;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IBuffer#cloneBuffer()
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*/
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public abstract IBuffer cloneBuffer(); |
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/**
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* Ajusta el ?rea del grid a un ancho y un alto dado en pixeles. Este ajuste se har?
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* en relaci?n a un m?todo de interpolaci?n definido en el par?metro.
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* @param w Ancho de la nueva imagen.
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* @param h Alto de la nueva imagen.
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* @param interpolation M?todo de interpolaci?n que se usar? en el ajuste.
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*/
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public RasterBuffer getAdjustedWindow(int w, int h, int interpolationMethod) throws InterruptedException { |
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if (interp == null) |
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interp = new BufferInterpolation(this); |
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if (w == getWidth() && h == getHeight())
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return this; |
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RasterBuffer rasterBuf = null;
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switch (interpolationMethod) {
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case BufferInterpolation.INTERPOLATION_NearestNeighbour:
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rasterBuf = interp.adjustRasterNearestNeighbourInterpolation(w, h); |
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break;
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case BufferInterpolation.INTERPOLATION_Bilinear:
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rasterBuf = interp.adjustRasterBilinearInterpolation(w, h); |
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break;
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case BufferInterpolation.INTERPOLATION_InverseDistance:
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rasterBuf = interp.adjustRasterInverseDistanceInterpolation(w, h); |
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break;
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case BufferInterpolation.INTERPOLATION_BicubicSpline:
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rasterBuf = interp.adjustRasterBicubicSplineInterpolation(w, h); |
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break;
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case BufferInterpolation.INTERPOLATION_BSpline:
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rasterBuf = interp.adjustRasterBSplineInterpolation(w, h); |
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break;
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} |
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if (rasterBuf != null) |
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return rasterBuf;
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else
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return this; |
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} |
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public BufferInterpolation getLastInterpolation() {
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return interp;
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} |
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/*
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* (non-Javadoc)
|
| 442 |
* @see org.gvsig.raster.dataset.IBuffer#getLimits()
|
| 443 |
*/
|
| 444 |
public double[] getLimits() throws InterruptedException { |
| 445 |
RasterTask task = RasterTaskQueue.get(Thread.currentThread().toString());
|
| 446 |
double max = Double.NEGATIVE_INFINITY; |
| 447 |
double secondMax = max;
|
| 448 |
double min = Double.MAX_VALUE; |
| 449 |
double secondMin = min;
|
| 450 |
double value = 0; |
| 451 |
|
| 452 |
switch (getDataType()) {
|
| 453 |
case IBuffer.TYPE_BYTE:
|
| 454 |
for (int i = 0; i < getBandCount(); i++) |
| 455 |
for (int r = 0; r < getHeight(); r++) { |
| 456 |
for (int c = 0; c < getWidth(); c++) { |
| 457 |
value = (double) ((getElemByte(r, c, i)));
|
| 458 |
if (value > max) {
|
| 459 |
if (max != value) secondMax = max;
|
| 460 |
max = value; |
| 461 |
} |
| 462 |
if (value < min) {
|
| 463 |
if (min != value) secondMin = min;
|
| 464 |
min = value; |
| 465 |
} |
| 466 |
} |
| 467 |
if (task.getEvent() != null) |
| 468 |
task.manageEvent(task.getEvent()); |
| 469 |
} |
| 470 |
break;
|
| 471 |
case IBuffer.TYPE_SHORT:
|
| 472 |
for (int i = 0; i < getBandCount(); i++) |
| 473 |
for (int r = 0; r < getHeight(); r++) { |
| 474 |
for (int c = 0; c < getWidth(); c++) { |
| 475 |
value = (double) getElemShort(r, c, i);
|
| 476 |
if (value > max) {
|
| 477 |
if (max != value) secondMax = max;
|
| 478 |
max = value; |
| 479 |
} |
| 480 |
if (value < min) {
|
| 481 |
if (min != value) secondMin = min;
|
| 482 |
min = value; |
| 483 |
} |
| 484 |
} |
| 485 |
if (task.getEvent() != null) |
| 486 |
task.manageEvent(task.getEvent()); |
| 487 |
} |
| 488 |
break;
|
| 489 |
case IBuffer.TYPE_INT:
|
| 490 |
for (int i = 0; i < getBandCount(); i++) |
| 491 |
for (int r = 0; r < getHeight(); r++) { |
| 492 |
for (int c = 0; c < getWidth(); c++) { |
| 493 |
value = (double) getElemInt(r, c, i);
|
| 494 |
if (value > max) {
|
| 495 |
if (max != value) secondMax = max;
|
| 496 |
max = value; |
| 497 |
} |
| 498 |
if (value < min) {
|
| 499 |
if (min != value) secondMin = min;
|
| 500 |
min = value; |
| 501 |
} |
| 502 |
} |
| 503 |
if (task.getEvent() != null) |
| 504 |
task.manageEvent(task.getEvent()); |
| 505 |
} |
| 506 |
break;
|
| 507 |
case IBuffer.TYPE_FLOAT:
|
| 508 |
for (int i = 0; i < getBandCount(); i++) |
| 509 |
for (int r = 0; r < getHeight(); r++) { |
| 510 |
for (int c = 0; c < getWidth(); c++) { |
| 511 |
value = (double) getElemFloat(r, c, i);
|
| 512 |
if (value > max) {
|
| 513 |
if (max != value) secondMax = max;
|
| 514 |
max = value; |
| 515 |
} |
| 516 |
if (value < min) {
|
| 517 |
if (min != value) secondMin = min;
|
| 518 |
min = value; |
| 519 |
} |
| 520 |
} |
| 521 |
if (task.getEvent() != null) |
| 522 |
task.manageEvent(task.getEvent()); |
| 523 |
} |
| 524 |
break;
|
| 525 |
case IBuffer.TYPE_DOUBLE:
|
| 526 |
for (int i = 0; i < getBandCount(); i++) |
| 527 |
for (int r = 0; r < getHeight(); r++) { |
| 528 |
for (int c = 0; c < getWidth(); c++) { |
| 529 |
value = getElemDouble(r, c, i); |
| 530 |
if (value > max) {
|
| 531 |
if (max != value) secondMax = max;
|
| 532 |
max = value; |
| 533 |
} |
| 534 |
if (value < min) {
|
| 535 |
if (min != value) secondMin = min;
|
| 536 |
min = value; |
| 537 |
} |
| 538 |
} |
| 539 |
if (task.getEvent() != null) |
| 540 |
task.manageEvent(task.getEvent()); |
| 541 |
} |
| 542 |
break;
|
| 543 |
} |
| 544 |
// Si no existe un secondMax lo igualo al maximo existente
|
| 545 |
if (secondMax == Double.NEGATIVE_INFINITY) |
| 546 |
secondMax = max; |
| 547 |
// Si no existe un secondMin lo igualo al minimo existente
|
| 548 |
if (secondMin == Double.MAX_VALUE) |
| 549 |
secondMin = min; |
| 550 |
|
| 551 |
double[] values = new double[4]; |
| 552 |
values[0] = min;
|
| 553 |
values[1] = max;
|
| 554 |
values[2] = secondMin;
|
| 555 |
values[3] = secondMax;
|
| 556 |
return values;
|
| 557 |
} |
| 558 |
|
| 559 |
/*
|
| 560 |
* (non-Javadoc)
|
| 561 |
* @see org.gvsig.raster.driver.datasetproperties.IHistogramable#getHistogram()
|
| 562 |
*/
|
| 563 |
public Histogram getHistogram() throws InterruptedException { |
| 564 |
RasterTask task = RasterTaskQueue.get(Thread.currentThread().toString());
|
| 565 |
progressHistogram = 0;
|
| 566 |
Histogram hist = null;
|
| 567 |
double[] limits = getLimits(); |
| 568 |
|
| 569 |
if (limits == null) |
| 570 |
return null; |
| 571 |
|
| 572 |
if (getDataType() == IBuffer.TYPE_BYTE)
|
| 573 |
hist = new Histogram(getBandCount(), 256, limits[0], limits[1]); |
| 574 |
else
|
| 575 |
hist = new Histogram(getBandCount(), RasterLibrary.defaultNumberOfClasses, limits[0], limits[1]); |
| 576 |
|
| 577 |
for (int iBand = 0; iBand < getBandCount(); iBand++) { |
| 578 |
for (int row = 0; row < getHeight(); row++) { |
| 579 |
switch(getDataType()) {
|
| 580 |
case IBuffer.TYPE_BYTE:
|
| 581 |
for (int col = 0; col < getWidth(); col++) |
| 582 |
hist.incrementPxValue(iBand, (double)(getElemByte(row, col, iBand)));
|
| 583 |
break;
|
| 584 |
case IBuffer.TYPE_SHORT:
|
| 585 |
for (int col = 0; col < getWidth(); col++) |
| 586 |
hist.incrementPxValue(iBand, (double)(getElemShort(row, col, iBand)));
|
| 587 |
break;
|
| 588 |
case IBuffer.TYPE_INT:
|
| 589 |
for (int col = 0; col < getWidth(); col++) |
| 590 |
hist.incrementPxValue(iBand, (double)(getElemInt(row, col, iBand)));
|
| 591 |
break;
|
| 592 |
case IBuffer.TYPE_FLOAT:
|
| 593 |
for (int col = 0; col < getWidth(); col++) |
| 594 |
hist.incrementPxValue(iBand, (double)getElemFloat(row, col, iBand));
|
| 595 |
break;
|
| 596 |
case IBuffer.TYPE_DOUBLE:
|
| 597 |
for (int col = 0; col < getWidth(); col++) |
| 598 |
hist.incrementPxValue(iBand, getElemDouble(row, col, iBand)); |
| 599 |
break;
|
| 600 |
} |
| 601 |
|
| 602 |
if (task.getEvent() != null) |
| 603 |
task.manageEvent(task.getEvent()); |
| 604 |
|
| 605 |
progressHistogram = ((iBand*getHeight() + row) * 100) /(getHeight() * getBandCount());
|
| 606 |
} |
| 607 |
} |
| 608 |
progressHistogram = 100;
|
| 609 |
return hist;
|
| 610 |
} |
| 611 |
|
| 612 |
/*
|
| 613 |
* (non-Javadoc)
|
| 614 |
* @see org.gvsig.raster.util.IHistogramable#resetPercent()
|
| 615 |
*/
|
| 616 |
public void resetPercent() { |
| 617 |
switch(process) {
|
| 618 |
case HISTOGRAM_PROCESS: progressHistogram = 0; |
| 619 |
case INTERPOLATION_PROCESS: progressInterpolation = 0; |
| 620 |
} |
| 621 |
} |
| 622 |
|
| 623 |
/*
|
| 624 |
* (non-Javadoc)
|
| 625 |
* @see org.gvsig.raster.util.IHistogramable#getPercent()
|
| 626 |
*/
|
| 627 |
public int getPercent() { |
| 628 |
switch(process) {
|
| 629 |
case HISTOGRAM_PROCESS: return progressHistogram; |
| 630 |
case INTERPOLATION_PROCESS: return progressInterpolation; |
| 631 |
} |
| 632 |
return 0; |
| 633 |
} |
| 634 |
|
| 635 |
/**
|
| 636 |
* Asigna el proceso del cual se desea obtener informaci?n. Los procesos
|
| 637 |
* disponibles se definen como constantes en esta clase.
|
| 638 |
* @param process
|
| 639 |
*/
|
| 640 |
public void setProcess(int process) { |
| 641 |
this.process = process;
|
| 642 |
} |
| 643 |
} |