svn-gvsig-desktop / trunk / libraries / libRaster / src / org / gvsig / raster / buffer / RasterBuffer.java @ 11453
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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.RasterReadOnlyHugeBuffer; |
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import org.gvsig.raster.dataset.IBuffer; |
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import org.gvsig.raster.dataset.NotSupportedExtensionException; |
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import org.gvsig.raster.dataset.RasterDriverException; |
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import org.gvsig.raster.util.Histogram; |
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import org.gvsig.raster.util.HistogramException; |
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import org.gvsig.raster.util.IHistogramable; |
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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 CANCEL_HISTOGRAM = IHistogramable.CANCEL_HISTOGRAM; |
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protected boolean[] cancel = new boolean[1]; |
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//Espacio en memoria (en Megas) que hay que sobrepasar para empezar a cachear.
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private static int cacheMemorySize = 25; |
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//Espacio en memoria (en Megas) que hay que sobrepasar para empezar a cachear en multipagina.
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private static int multicacheMemorySize = 100; |
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public double noDataValue = -99999; |
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protected int percent = 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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/**
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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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try {
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return new RasterReadOnlyHugeBuffer(dataType, width, height, bandNr); |
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} catch (FileNotFoundException e) { |
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//TODO: EXCEPTION: Modificar el lanzamiento de excepciones del RasterBuffer
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e.printStackTrace(); |
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} catch (NotSupportedExtensionException e) {
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e.printStackTrace(); |
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} catch (RasterDriverException e) {
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e.printStackTrace(); |
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} |
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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 = cacheMemorySize * 1024; |
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long ms2 = multicacheMemorySize * 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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//if(filePath == null)
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return new RasterCache(dataType, width, height, bandNr); |
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/*else
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return new RasterReadOnlyHugeBuffer(dataType, width, height, bandNr, filePath);*/
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} |
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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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* 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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* Ajusta el raster al ancho y alto solicitado por el vecino m?s cercano. Promedia el valor de dos
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* pixeles contiguos.
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* @param w Nuevo ancho
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* @param h Nuevo alto
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*/
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private RasterBuffer adjustRasterNearestNeighbourInterpolation(int w, int h) { |
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double stepX = (double)w / (double)width; |
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double stepY = (double)h / (double)height; |
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RasterBuffer rasterBuf = new RasterMemoryBuffer(getDataType(), w, h, getBandCount(), true); |
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int[] bands = new int[rasterBuf.getBandCount()]; |
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for(int iBand = 0; iBand < rasterBuf.getBandCount(); iBand ++) |
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bands[iBand] = iBand; |
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switch (dataType) {
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case RasterBuffer.TYPE_BYTE:
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for(int iBand = 0; iBand < bands.length; iBand ++) { |
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if(w <= width) { //submuestreo |
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for(int iRow = 0; iRow < height; iRow ++) |
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for(int iCol = 0; iCol < width; iCol ++) |
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rasterBuf.setElem((int)(iRow * stepY), (int)(iCol * stepX), bands[iBand], getElemByte(iRow, iCol, iBand)); |
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}else{ //supermuestreo |
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for(int iRow = 0; iRow < h; iRow ++) |
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for(int iCol = 0; iCol < w; iCol ++) |
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rasterBuf.setElem(iRow, iCol, bands[iBand], getElemByte((int)(iRow / stepY), (int)(iCol / stepX), iBand)); |
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} |
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} |
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break;
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case RasterBuffer.TYPE_DOUBLE:
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for(int iBand = 0; iBand < bands.length; iBand ++) { |
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if(w <= width) { //submuestreo |
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for(int iRow = 0; iRow < height; iRow ++) |
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for(int iCol = 0; iCol < width; iCol ++) |
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rasterBuf.setElem((int)(iRow * stepY), (int)(iCol * stepX), bands[iBand], getElemDouble(iRow, iCol, iBand)); |
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}else{ //supermuestreo |
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for(int iRow = 0; iRow < h; iRow ++) |
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for(int iCol = 0; iCol < w; iCol ++) |
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rasterBuf.setElem(iRow, iCol, bands[iBand], getElemDouble((int)(iRow / stepY), (int)(iCol / stepX), iBand)); |
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} |
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} |
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break;
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case RasterBuffer.TYPE_FLOAT:
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for(int iBand = 0; iBand < bands.length; iBand ++) { |
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if(w <= width) { //submuestreo |
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for(int iRow = 0; iRow < height; iRow ++) |
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for(int iCol = 0; iCol < width; iCol ++) |
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rasterBuf.setElem((int)(iRow * stepY), (int)(iCol * stepX), bands[iBand], getElemFloat(iRow, iCol, iBand)); |
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}else{ //supermuestreo |
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for(int iRow = 0; iRow < h; iRow ++) |
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for(int iCol = 0; iCol < w; iCol ++) |
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rasterBuf.setElem(iRow, iCol, bands[iBand], getElemFloat((int)(iRow / stepY), (int)(iCol / stepX), iBand)); |
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} |
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} |
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break;
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case RasterBuffer.TYPE_INT:
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for(int iBand = 0; iBand < bands.length; iBand ++) { |
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if(w <= width) { //submuestreo |
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for(int iRow = 0; iRow < height; iRow ++) |
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for(int iCol = 0; iCol < width; iCol ++) |
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rasterBuf.setElem((int)(iRow * stepY), (int)(iCol * stepX), bands[iBand], getElemInt(iRow, iCol, iBand)); |
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}else{ //supermuestreo |
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for(int iRow = 0; iRow < h; iRow ++) |
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for(int iCol = 0; iCol < w; iCol ++) |
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rasterBuf.setElem(iRow, iCol, bands[iBand], getElemInt((int)(iRow / stepY), (int)(iCol / stepX), iBand)); |
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} |
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} |
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break;
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case RasterBuffer.TYPE_USHORT:
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case RasterBuffer.TYPE_SHORT:
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for(int iBand = 0; iBand < bands.length; iBand ++) { |
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if(w <= width) { //submuestreo |
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for(int iRow = 0; iRow < height; iRow ++) |
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for(int iCol = 0; iCol < width; iCol ++) |
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rasterBuf.setElem((int)(iRow * stepY), (int)(iCol * stepX), bands[iBand], getElemShort(iRow, iCol, iBand)); |
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}else{ //supermuestreo |
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for(int iRow = 0; iRow < h; iRow ++) |
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for(int iCol = 0; iCol < w; iCol ++) |
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rasterBuf.setElem(iRow, iCol, bands[iBand], getElemShort((int)(iRow / stepY), (int)(iCol / stepX), iBand)); |
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} |
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} |
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break;
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} |
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return rasterBuf;
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} |
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/**
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* Ajusta el raster al ancho y alto solicitado ajustando con una interpolaci?n bilineal. Promedia
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* el valor de cuatro pixeles adyacentes.
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* @param w Nuevo ancho
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* @param h Nuevo alto
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*/
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private RasterBuffer adjustRasterBilinearInterpolation(int w, int h) { |
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double pxSize = (double)width / (double)w; |
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RasterBuffer rasterBuf = new RasterMemoryBuffer(getDataType(), w, h, getBandCount(), true); |
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double posX = pxSize / 2D; |
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double posY = posX;
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double dx = 0D, dy = 0D; |
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for(int iBand = 0; iBand < getBandCount(); iBand ++) { |
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posY = pxSize / 2D;
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switch (dataType) {
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case RasterBuffer.TYPE_BYTE:
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for(int iRow = 0; iRow < h; iRow ++) { |
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dy = posY - ((int)posY);
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posX = pxSize / 2D;
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for(int iCol = 0; iCol < w; iCol ++) { |
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dx = posX - ((int)posX);
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double[] kernel = getKernelByte(((int)posX), ((int)posY), iBand); |
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double[] nz = getBilinearNZ(dx, dy, kernel); |
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double b = 0; |
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if(nz[0] > 0.0) |
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b = (nz[1] / nz[0]); |
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rasterBuf.setElem(iRow, iCol, iBand, (byte)((byte)b & 0xff)); |
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posX += pxSize; |
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} |
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posY += pxSize; |
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} |
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break;
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case RasterBuffer.TYPE_SHORT:
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for(int iRow = 0; iRow < h; iRow ++) { |
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dy = posY - ((int)posY);
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posX = pxSize / 2D;
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for(int iCol = 0; iCol < w; iCol ++) { |
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dx = posX - ((int)posX);
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double[] kernel = getKernelShort(((int)posX), ((int)posY), iBand); |
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double[] nz = getBilinearNZ(dx, dy, kernel); |
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double b = 0; |
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if(nz[0] > 0.0) |
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b = (nz[1] / nz[0]); |
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rasterBuf.setElem(iRow, iCol, iBand, (short)((short)b & 0xffff)); |
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posX += pxSize; |
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} |
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posY += pxSize; |
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} |
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break;
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case RasterBuffer.TYPE_INT:
|
| 412 |
for(int iRow = 0; iRow < h; iRow ++) { |
| 413 |
dy = posY - ((int)posY);
|
| 414 |
posX = pxSize / 2D;
|
| 415 |
for(int iCol = 0; iCol < w; iCol ++) { |
| 416 |
dx = posX - ((int)posX);
|
| 417 |
double[] kernel = getKernelInt(((int)posX), ((int)posY), iBand); |
| 418 |
double[] nz = getBilinearNZ(dx, dy, kernel); |
| 419 |
double b = 0; |
| 420 |
if(nz[0] > 0.0) |
| 421 |
b = (nz[1] / nz[0]); |
| 422 |
rasterBuf.setElem(iRow, iCol, iBand, (int)((int)b & 0xff)); |
| 423 |
posX += pxSize; |
| 424 |
} |
| 425 |
posY += pxSize; |
| 426 |
} |
| 427 |
break;
|
| 428 |
case RasterBuffer.TYPE_FLOAT:
|
| 429 |
for(int iRow = 0; iRow < h; iRow ++) { |
| 430 |
dy = posY - ((int)posY);
|
| 431 |
posX = pxSize / 2D;
|
| 432 |
for(int iCol = 0; iCol < w; iCol ++) { |
| 433 |
dx = posX - ((int)posX);
|
| 434 |
double[] kernel = getKernelFloat(((int)posX), ((int)posY), iBand); |
| 435 |
double[] nz = getBilinearNZ(dx, dy, kernel); |
| 436 |
double b = 0; |
| 437 |
if(nz[0] > 0.0) |
| 438 |
b = (nz[1] / nz[0]); |
| 439 |
rasterBuf.setElem(iRow, iCol, iBand, (float)b);
|
| 440 |
posX += pxSize; |
| 441 |
} |
| 442 |
posY += pxSize; |
| 443 |
} |
| 444 |
break;
|
| 445 |
case RasterBuffer.TYPE_DOUBLE:
|
| 446 |
for(int iRow = 0; iRow < h; iRow ++) { |
| 447 |
dy = posY - ((int)posY);
|
| 448 |
posX = pxSize / 2D;
|
| 449 |
for(int iCol = 0; iCol < w; iCol ++) { |
| 450 |
dx = posX - ((int)posX);
|
| 451 |
double[] kernel = getKernelDouble(((int)posX), ((int)posY), iBand); |
| 452 |
double[] nz = getBilinearNZ(dx, dy, kernel); |
| 453 |
double b = 0; |
| 454 |
if(nz[0] > 0.0) |
| 455 |
b = (nz[1] / nz[0]); |
| 456 |
rasterBuf.setElem(iRow, iCol, iBand, (double)b);
|
| 457 |
posX += pxSize; |
| 458 |
} |
| 459 |
posY += pxSize; |
| 460 |
} |
| 461 |
break;
|
| 462 |
} |
| 463 |
|
| 464 |
} |
| 465 |
|
| 466 |
return rasterBuf;
|
| 467 |
} |
| 468 |
|
| 469 |
/**
|
| 470 |
* Calcula los valores N y Z para el m?todo bilinear
|
| 471 |
* @param dx
|
| 472 |
* @param dy
|
| 473 |
* @param kernel
|
| 474 |
* @return
|
| 475 |
*/
|
| 476 |
private double[] getBilinearNZ(double dx, double dy, double[] kernel) { |
| 477 |
double z = 0.0, n = 0.0, d; |
| 478 |
d = (1.0 - dx) * (1.0 - dy); |
| 479 |
z += d * kernel[0];
|
| 480 |
n += d; |
| 481 |
|
| 482 |
d = dx * (1.0 - dy);
|
| 483 |
z += d * kernel[1];
|
| 484 |
n += d; |
| 485 |
|
| 486 |
d = (1.0 - dx) * dy;
|
| 487 |
z += d * kernel[2];
|
| 488 |
n += d; |
| 489 |
|
| 490 |
d = dx * dy; |
| 491 |
z += d * kernel[3];
|
| 492 |
n += d; |
| 493 |
return new double[]{n, z}; |
| 494 |
} |
| 495 |
|
| 496 |
/**
|
| 497 |
* Obtiene un kernel de cuatro elemento que corresponden a los pixeles (x, y), (x + 1, y),
|
| 498 |
* (x, y + 1), (x + 1, y + 1). Si los pixeles x + 1 o y + 1 se salen del raster de origen
|
| 499 |
* se tomar? x e y.
|
| 500 |
* @param x Coordenada X del pixel inicial
|
| 501 |
* @param y Coordenada Y del pixel inicial
|
| 502 |
* @param band N?mero de banda.
|
| 503 |
* @return Kernel solicitado en forma de array.
|
| 504 |
*/
|
| 505 |
private double[] getKernelByte(int x, int y, int band) { |
| 506 |
double[] d = new double[4]; |
| 507 |
d[0] = (getElemByte(y, x, band) & 0xff); |
| 508 |
int nextX = ((x + 1) >= getWidth()) ? x : (x + 1); |
| 509 |
int nextY = ((y + 1) >= getHeight()) ? y : (y + 1); |
| 510 |
d[1] = (getElemByte(y, nextX, band) & 0xff); |
| 511 |
d[2] = (getElemByte(nextY, x, band) & 0xff); |
| 512 |
d[3] = (getElemByte(nextY, nextX, band) & 0xff); |
| 513 |
return d;
|
| 514 |
} |
| 515 |
|
| 516 |
/**
|
| 517 |
* Obtiene un kernel de cuatro elemento que corresponden a los pixeles (x, y), (x + 1, y),
|
| 518 |
* (x, y + 1), (x + 1, y + 1). Si los pixeles x + 1 o y + 1 se salen del raster de origen
|
| 519 |
* se tomar? x e y.
|
| 520 |
* @param x Coordenada X del pixel inicial
|
| 521 |
* @param y Coordenada Y del pixel inicial
|
| 522 |
* @param band N?mero de banda.
|
| 523 |
* @return Kernel solicitado en forma de array.
|
| 524 |
*/
|
| 525 |
private double[] getKernelShort(int x, int y, int band) { |
| 526 |
double[] d = new double[4]; |
| 527 |
d[0] = (getElemShort(y, x, band) & 0xffff); |
| 528 |
int nextX = ((x + 1) >= getWidth()) ? x : (x + 1); |
| 529 |
int nextY = ((y + 1) >= getHeight()) ? y : (y + 1); |
| 530 |
d[1] = (getElemShort(y, nextX, band) & 0xffff); |
| 531 |
d[2] = (getElemShort(nextY, x, band) & 0xffff); |
| 532 |
d[3] = (getElemShort(nextY, nextX, band) & 0xffff); |
| 533 |
return d;
|
| 534 |
} |
| 535 |
|
| 536 |
/**
|
| 537 |
* Obtiene un kernel de cuatro elemento que corresponden a los pixeles (x, y), (x + 1, y),
|
| 538 |
* (x, y + 1), (x + 1, y + 1). Si los pixeles x + 1 o y + 1 se salen del raster de origen
|
| 539 |
* se tomar? x e y.
|
| 540 |
* @param x Coordenada X del pixel inicial
|
| 541 |
* @param y Coordenada Y del pixel inicial
|
| 542 |
* @param band N?mero de banda.
|
| 543 |
* @return Kernel solicitado en forma de array.
|
| 544 |
*/
|
| 545 |
private double[] getKernelInt(int x, int y, int band) { |
| 546 |
double[] d = new double[4]; |
| 547 |
d[0] = (getElemInt(y, x, band) & 0xffffffff); |
| 548 |
int nextX = ((x + 1) >= getWidth()) ? x : (x + 1); |
| 549 |
int nextY = ((y + 1) >= getHeight()) ? y : (y + 1); |
| 550 |
d[1] = (getElemInt(y, nextX, band) & 0xffffffff); |
| 551 |
d[2] = (getElemInt(nextY, x, band) & 0xffffffff); |
| 552 |
d[3] = (getElemInt(nextY, nextX, band) & 0xffffffff); |
| 553 |
return d;
|
| 554 |
} |
| 555 |
|
| 556 |
/**
|
| 557 |
* Obtiene un kernel de cuatro elemento que corresponden a los pixeles (x, y), (x + 1, y),
|
| 558 |
* (x, y + 1), (x + 1, y + 1). Si los pixeles x + 1 o y + 1 se salen del raster de origen
|
| 559 |
* se tomar? x e y.
|
| 560 |
* @param x Coordenada X del pixel inicial
|
| 561 |
* @param y Coordenada Y del pixel inicial
|
| 562 |
* @param band N?mero de banda.
|
| 563 |
* @return Kernel solicitado en forma de array.
|
| 564 |
*/
|
| 565 |
private double[] getKernelFloat(int x, int y, int band) { |
| 566 |
double[] d = new double[4]; |
| 567 |
d[0] = getElemFloat(y, x, band);
|
| 568 |
int nextX = ((x + 1) >= getWidth()) ? x : (x + 1); |
| 569 |
int nextY = ((y + 1) >= getHeight()) ? y : (y + 1); |
| 570 |
d[1] = getElemFloat(y, nextX, band);
|
| 571 |
d[2] = getElemFloat(nextY, x, band);
|
| 572 |
d[3] = getElemFloat(nextY, nextX, band);
|
| 573 |
return d;
|
| 574 |
} |
| 575 |
|
| 576 |
/**
|
| 577 |
* Obtiene un kernel de cuatro elemento que corresponden a los pixeles (x, y), (x + 1, y),
|
| 578 |
* (x, y + 1), (x + 1, y + 1). Si los pixeles x + 1 o y + 1 se salen del raster de origen
|
| 579 |
* se tomar? x e y.
|
| 580 |
* @param x Coordenada X del pixel inicial
|
| 581 |
* @param y Coordenada Y del pixel inicial
|
| 582 |
* @param band N?mero de banda.
|
| 583 |
* @return Kernel solicitado en forma de array.
|
| 584 |
*/
|
| 585 |
private double[] getKernelDouble(int x, int y, int band) { |
| 586 |
double[] d = new double[4]; |
| 587 |
d[0] = getElemDouble(y, x, band);
|
| 588 |
int nextX = ((x + 1) >= getWidth()) ? x : (x + 1); |
| 589 |
int nextY = ((y + 1) >= getHeight()) ? y : (y + 1); |
| 590 |
d[1] = getElemDouble(y, nextX, band);
|
| 591 |
d[2] = getElemDouble(nextY, x, band);
|
| 592 |
d[3] = getElemDouble(nextY, nextX, band);
|
| 593 |
return d;
|
| 594 |
} |
| 595 |
|
| 596 |
/**
|
| 597 |
* Ajusta el raster al ancho y alto solicitado ajustando con una interpolaci?n de distancia inversa.
|
| 598 |
* Asigna el valor de un pixel en funci?n inversa de la distancia.
|
| 599 |
*
|
| 600 |
* @param w Nuevo ancho
|
| 601 |
* @param h Nuevo alto
|
| 602 |
*/
|
| 603 |
private RasterBuffer adjustRasterInverseDistanceInterpolation(int w, int h) { |
| 604 |
return this; |
| 605 |
} |
| 606 |
|
| 607 |
/**
|
| 608 |
* Ajusta el raster al ancho y alto solicitado ajustando con una interpolaci?n de spline bicubica.
|
| 609 |
* @param w Nuevo ancho
|
| 610 |
* @param h Nuevo alto
|
| 611 |
*/
|
| 612 |
private RasterBuffer adjustRasterBicubicSplineInterpolation(int w, int h) { |
| 613 |
return this; |
| 614 |
} |
| 615 |
|
| 616 |
/**
|
| 617 |
* Ajusta el raster al ancho y alto solicitado ajustando con una interpolaci?n BSpline.
|
| 618 |
* @param w Nuevo ancho
|
| 619 |
* @param h Nuevo alto
|
| 620 |
*/
|
| 621 |
private RasterBuffer adjustRasterBSplineInterpolation(int w, int h) { |
| 622 |
return this; |
| 623 |
} |
| 624 |
|
| 625 |
/*
|
| 626 |
* (non-Javadoc)
|
| 627 |
* @see org.gvsig.fmap.driver.IBuffer#getNoDataValue()
|
| 628 |
*/
|
| 629 |
public double getNoDataValue() { |
| 630 |
return noDataValue;
|
| 631 |
} |
| 632 |
|
| 633 |
/*
|
| 634 |
* (non-Javadoc)
|
| 635 |
* @see org.gvsig.fmap.driver.IBuffer#getByteNoDataValue()
|
| 636 |
*/
|
| 637 |
public byte getByteNoDataValue() { |
| 638 |
return (byte)noDataValue; |
| 639 |
} |
| 640 |
|
| 641 |
/*
|
| 642 |
* (non-Javadoc)
|
| 643 |
* @see org.gvsig.fmap.driver.IBuffer#getShortNoDataValue()
|
| 644 |
*/
|
| 645 |
public short getShortNoDataValue(){ |
| 646 |
return (short)noDataValue; |
| 647 |
} |
| 648 |
|
| 649 |
/*
|
| 650 |
* (non-Javadoc)
|
| 651 |
* @see org.gvsig.fmap.driver.IBuffer#getIntNoDataValue()
|
| 652 |
*/
|
| 653 |
public int getIntNoDataValue(){ |
| 654 |
return (int)noDataValue; |
| 655 |
} |
| 656 |
|
| 657 |
/*
|
| 658 |
* (non-Javadoc)
|
| 659 |
* @see org.gvsig.fmap.driver.IBuffer#getFloatNoDataValue()
|
| 660 |
*/
|
| 661 |
public float getFloatNoDataValue(){ |
| 662 |
return (float)noDataValue; |
| 663 |
} |
| 664 |
|
| 665 |
/*
|
| 666 |
* (non-Javadoc)
|
| 667 |
* @see org.gvsig.fmap.driver.IBuffer#setNoDataValue(double)
|
| 668 |
*/
|
| 669 |
public void setNoDataValue(double nd){ |
| 670 |
noDataValue = nd; |
| 671 |
} |
| 672 |
|
| 673 |
/*
|
| 674 |
* (non-Javadoc)
|
| 675 |
* @see org.gvsig.fmap.driver.IBuffer#getNotValidValue()
|
| 676 |
*/
|
| 677 |
public double getNotValidValue(){ |
| 678 |
return notValidValue;
|
| 679 |
} |
| 680 |
|
| 681 |
/*
|
| 682 |
* (non-Javadoc)
|
| 683 |
* @see org.gvsig.fmap.driver.IBuffer#setNotValidValue(java.lang.Object)
|
| 684 |
*/
|
| 685 |
public void setNotValidValue(double value){ |
| 686 |
this.notValidValue = value;
|
| 687 |
} |
| 688 |
|
| 689 |
/*
|
| 690 |
* (non-Javadoc)
|
| 691 |
* @see org.gvsig.fmap.driver.IBuffer#cloneBuffer()
|
| 692 |
*/
|
| 693 |
public abstract IBuffer cloneBuffer(); |
| 694 |
|
| 695 |
/**
|
| 696 |
* Ajusta el ?rea del grid a un ancho y un alto dado en pixeles. Este ajuste se har?
|
| 697 |
* en relaci?n a un m?todo de interpolaci?n definido en el par?metro.
|
| 698 |
* @param w Ancho de la nueva imagen.
|
| 699 |
* @param h Alto de la nueva imagen.
|
| 700 |
* @param interpolation M?todo de interpolaci?n que se usar? en el ajuste.
|
| 701 |
*/
|
| 702 |
public RasterBuffer getAdjustedWindow(int w, int h, int interpolationMethod) { |
| 703 |
if(w == getWidth() && h == getHeight())
|
| 704 |
return this; |
| 705 |
RasterBuffer rasterBuf = null;
|
| 706 |
switch(interpolationMethod) {
|
| 707 |
case IQueryableRaster.INTERPOLATION_NearestNeighbour:
|
| 708 |
rasterBuf = adjustRasterNearestNeighbourInterpolation(w, h); |
| 709 |
break;
|
| 710 |
case IQueryableRaster.INTERPOLATION_Bilinear:
|
| 711 |
rasterBuf = adjustRasterBilinearInterpolation(w, h); |
| 712 |
break;
|
| 713 |
case IQueryableRaster.INTERPOLATION_InverseDistance:
|
| 714 |
rasterBuf = adjustRasterInverseDistanceInterpolation(w, h); |
| 715 |
break;
|
| 716 |
case IQueryableRaster.INTERPOLATION_BicubicSpline:
|
| 717 |
rasterBuf = adjustRasterBicubicSplineInterpolation(w, h); |
| 718 |
break;
|
| 719 |
case IQueryableRaster.INTERPOLATION_BSpline:
|
| 720 |
rasterBuf = adjustRasterBSplineInterpolation(w, h); |
| 721 |
break;
|
| 722 |
} |
| 723 |
return rasterBuf;
|
| 724 |
} |
| 725 |
|
| 726 |
/**
|
| 727 |
* Calcula el m?nimo y el m?ximo del histograma previamente.
|
| 728 |
* @return double[] con el m?nimo y el m?ximo.
|
| 729 |
*/
|
| 730 |
private double[] getLimits() { |
| 731 |
double max = Double.NEGATIVE_INFINITY; |
| 732 |
double min = Double.MAX_VALUE; |
| 733 |
double value = 0; |
| 734 |
|
| 735 |
switch (getDataType()) {
|
| 736 |
case IBuffer.TYPE_BYTE:
|
| 737 |
for (int i = 0; i < getBandCount(); i++) |
| 738 |
for (int r = 0; r < getHeight(); r++) { |
| 739 |
for (int c = 0; c < getWidth(); c++) { |
| 740 |
value = (double) (getElemByte(r, c, i) & 0xff); |
| 741 |
if (value > max) max = value;
|
| 742 |
if (value < min) min = value;
|
| 743 |
} |
| 744 |
if (isCanceled(CANCEL_HISTOGRAM))
|
| 745 |
return null; |
| 746 |
} |
| 747 |
break;
|
| 748 |
case IBuffer.TYPE_SHORT:
|
| 749 |
for (int i = 0; i < getBandCount(); i++) |
| 750 |
for (int r = 0; r < getHeight(); r++) { |
| 751 |
for (int c = 0; c < getWidth(); c++) { |
| 752 |
value = (double) (getElemShort(r, c, i) & 0xffff); |
| 753 |
if (value > max) max = value;
|
| 754 |
if (value < min) min = value;
|
| 755 |
} |
| 756 |
if (isCanceled(CANCEL_HISTOGRAM))
|
| 757 |
return null; |
| 758 |
} |
| 759 |
break;
|
| 760 |
case IBuffer.TYPE_INT:
|
| 761 |
for (int i = 0; i < getBandCount(); i++) |
| 762 |
for (int r = 0; r < getHeight(); r++) { |
| 763 |
for (int c = 0; c < getWidth(); c++) { |
| 764 |
value = (double) (getElemInt(r, c, i) & 0xffffffff); |
| 765 |
if (value > max) max = value;
|
| 766 |
if (value < min) min = value;
|
| 767 |
} |
| 768 |
if (isCanceled(CANCEL_HISTOGRAM))
|
| 769 |
return null; |
| 770 |
} |
| 771 |
break;
|
| 772 |
case IBuffer.TYPE_FLOAT:
|
| 773 |
for (int i = 0; i < getBandCount(); i++) |
| 774 |
for (int r = 0; r < getHeight(); r++) { |
| 775 |
for (int c = 0; c < getWidth(); c++) { |
| 776 |
value = (double) getElemFloat(r, c, i);
|
| 777 |
if (value > max) max = value;
|
| 778 |
if (value < min) min = value;
|
| 779 |
} |
| 780 |
if (isCanceled(CANCEL_HISTOGRAM))
|
| 781 |
return null; |
| 782 |
} |
| 783 |
break;
|
| 784 |
case IBuffer.TYPE_DOUBLE:
|
| 785 |
for (int i = 0; i < getBandCount(); i++) |
| 786 |
for (int r = 0; r < getHeight(); r++) { |
| 787 |
for (int c = 0; c < getWidth(); c++) { |
| 788 |
value = getElemDouble(r, c, i); |
| 789 |
if (value > max) max = value;
|
| 790 |
if (value < min) min = value;
|
| 791 |
} |
| 792 |
if (isCanceled(CANCEL_HISTOGRAM))
|
| 793 |
return null; |
| 794 |
} |
| 795 |
break;
|
| 796 |
} |
| 797 |
double[] values = new double[2]; |
| 798 |
values[0] = min;
|
| 799 |
values[1] = max;
|
| 800 |
return values;
|
| 801 |
} |
| 802 |
|
| 803 |
/*
|
| 804 |
* (non-Javadoc)
|
| 805 |
* @see org.gvsig.raster.driver.datasetproperties.IHistogramable#getHistogram()
|
| 806 |
*/
|
| 807 |
public Histogram getHistogram() throws HistogramException { |
| 808 |
percent = 0;
|
| 809 |
Histogram hist = null;
|
| 810 |
double[] limits = getLimits(); |
| 811 |
|
| 812 |
if (limits == null) |
| 813 |
return null; |
| 814 |
|
| 815 |
if (getDataType() == IBuffer.TYPE_BYTE)
|
| 816 |
hist = new Histogram(getBandCount(), 255, limits[0], limits[1]); |
| 817 |
else
|
| 818 |
hist = new Histogram(getBandCount(), RasterLibrary.defaultNumberOfClasses, limits[0], limits[1]); |
| 819 |
|
| 820 |
for (int iBand = 0; iBand < getBandCount(); iBand++) { |
| 821 |
for (int row = 0; row < getHeight(); row++) { |
| 822 |
switch(getDataType()) {
|
| 823 |
case IBuffer.TYPE_BYTE:
|
| 824 |
for (int col = 0; col < getWidth(); col++) |
| 825 |
hist.incrementPxValue(iBand, (double)(getElemByte(row, col, iBand) & 0xff)); |
| 826 |
break;
|
| 827 |
case IBuffer.TYPE_SHORT:
|
| 828 |
for (int col = 0; col < getWidth(); col++) |
| 829 |
hist.incrementPxValue(iBand, (double)(getElemShort(row, col, iBand) & 0xffff)); |
| 830 |
break;
|
| 831 |
case IBuffer.TYPE_INT:
|
| 832 |
for (int col = 0; col < getWidth(); col++) |
| 833 |
hist.incrementPxValue(iBand, (double)(getElemInt(row, col, iBand) & 0xffffffff)); |
| 834 |
break;
|
| 835 |
case IBuffer.TYPE_FLOAT:
|
| 836 |
for (int col = 0; col < getWidth(); col++) |
| 837 |
hist.incrementPxValue(iBand, (double)getElemFloat(row, col, iBand));
|
| 838 |
break;
|
| 839 |
case IBuffer.TYPE_DOUBLE:
|
| 840 |
for (int col = 0; col < getWidth(); col++) |
| 841 |
hist.incrementPxValue(iBand, getElemDouble(row, col, iBand)); |
| 842 |
break;
|
| 843 |
} |
| 844 |
|
| 845 |
if (isCanceled(CANCEL_HISTOGRAM))
|
| 846 |
return null; |
| 847 |
|
| 848 |
percent = ((iBand*getHeight() + row) * 100) /(getHeight() * getBandCount());
|
| 849 |
} |
| 850 |
} |
| 851 |
percent = 100;
|
| 852 |
return hist;
|
| 853 |
} |
| 854 |
|
| 855 |
/*
|
| 856 |
* (non-Javadoc)
|
| 857 |
* @see org.gvsig.raster.util.IHistogramable#resetPercent()
|
| 858 |
*/
|
| 859 |
public void resetPercent() { |
| 860 |
percent = 0;
|
| 861 |
} |
| 862 |
|
| 863 |
/*
|
| 864 |
* (non-Javadoc)
|
| 865 |
* @see org.gvsig.raster.util.IHistogramable#getPercent()
|
| 866 |
*/
|
| 867 |
public int getPercent() { |
| 868 |
return percent;
|
| 869 |
} |
| 870 |
|
| 871 |
/*
|
| 872 |
* (non-Javadoc)
|
| 873 |
* @see org.gvsig.raster.util.ICancellable#isCanceled()
|
| 874 |
*/
|
| 875 |
public boolean isCanceled(int process) { |
| 876 |
if(process == CANCEL_HISTOGRAM)
|
| 877 |
return cancel[0]; |
| 878 |
return false; |
| 879 |
} |
| 880 |
|
| 881 |
/*
|
| 882 |
* (non-Javadoc)
|
| 883 |
* @see org.gvsig.raster.util.ICancellable#setCanceled(boolean)
|
| 884 |
*/
|
| 885 |
public void setCanceled(boolean value, int process) { |
| 886 |
if(process == CANCEL_HISTOGRAM || process == 0) |
| 887 |
cancel[0] = value;
|
| 888 |
} |
| 889 |
} |