root / trunk / libraries / libRaster / src / org / gvsig / raster / dataaccess / buffer / RasterBuffer.java @ 11072
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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.dataaccess.buffer; |
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import java.io.FileNotFoundException; |
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import org.gvsig.raster.dataaccess.cache.RasterCache; |
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import org.gvsig.raster.dataaccess.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.DataClassList; |
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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.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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//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 malloc
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* @return
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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, String filePath) |
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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 && filePath != null){ |
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try {
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return new RasterReadOnlyHugeBuffer(dataType, width, height, bandNr, filePath); |
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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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public abstract RasterBuffer adjustRasterNearestNeighbourInterpolation(int w, int h, int[] bands); |
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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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public abstract RasterBuffer adjustRasterBilinearInterpolation(int w, int h, int[] bands); |
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/**
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* Ajusta el raster al ancho y alto solicitado ajustando con una interpolaci?n de distancia inversa.
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* Asigna el valor de un pixel en funci?n inversa de la distancia.
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*
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* @param w Nuevo ancho
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* @param h Nuevo alto
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*/
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public abstract RasterBuffer adjustRasterInverseDistanceInterpolation(int w, int h, int[] bands); |
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/**
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* Ajusta el raster al ancho y alto solicitado ajustando con una interpolaci?n de spline bicubica.
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* @param w Nuevo ancho
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* @param h Nuevo alto
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*/
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public abstract RasterBuffer adjustRasterBicubicSplineInterpolation(int w, int h, int[] bands); |
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/**
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* Ajusta el raster al ancho y alto solicitado ajustando con una interpolaci?n BSpline.
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* @param w Nuevo ancho
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* @param h Nuevo alto
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*/
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public abstract RasterBuffer adjustRasterBSplineInterpolation(int w, int h, int[] bands); |
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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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* (non-Javadoc)
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* @see org.gvsig.raster.driver.datasetproperties.IHistogramable#getHistogram()
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*/
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public Histogram getHistogram() throws HistogramException { |
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percent = 0;
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if(getDataType() != IBuffer.TYPE_BYTE)
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return null; |
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Histogram hist = new Histogram(getBandCount(), 256); |
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for (int iBand = 0; iBand < getBandCount(); iBand++) |
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for (int row = 0; row < getHeight(); row++) { |
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for (int col = 0; col < getWidth(); col++) |
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hist.incrementPxValue(iBand, (getElemByte(row, col, iBand) & 0xff));
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if (isCanceled()) return null; |
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percent = ((iBand*getHeight() + row) * 100) /(getHeight() * getBandCount());
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} |
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percent = 100;
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return hist;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.driver.datasetproperties.IHistogramable#getHistogramUsingClasses(org.gvsig.raster.shared.DataClassList)
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*/
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public Histogram getHistogramUsingClasses(DataClassList classes) throws HistogramException { |
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percent = 0;
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Histogram hist = new Histogram(getBandCount(), classes.length());
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for (int iBand = 0; iBand < getBandCount(); iBand++) { |
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for (int col = 0; col < getHeight(); col++) { |
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for (int row = 0; row < getWidth(); row++) { |
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int pixelValue = -1; |
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switch(this.getDataType()){ |
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case IBuffer.TYPE_BYTE: pixelValue = classes.getClassPosition((double)(getElemByte(row, col, iBand) & 0xff)); break; |
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case IBuffer.TYPE_SHORT: pixelValue = classes.getClassPosition((double)(getElemShort(row, col, iBand) & 0xffff)); break; |
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case IBuffer.TYPE_INT: pixelValue = classes.getClassPosition((double)(getElemInt(row, col, iBand) & 0xffffff)); break; |
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case IBuffer.TYPE_FLOAT: pixelValue = classes.getClassPosition((double)getElemFloat(row, col, iBand)); break; |
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case IBuffer.TYPE_DOUBLE: pixelValue = classes.getClassPosition((double)getElemDouble(row, col, iBand)); break; |
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} |
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if(pixelValue >= 0) |
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hist.incrementPxValue(iBand, pixelValue); |
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} |
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if (isCanceled()) return null; |
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percent = ((iBand*getHeight() + col) * 100) / (getHeight() * getBandCount());
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} |
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} |
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percent = 100;
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return hist;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.util.IHistogramable#resetPercent()
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*/
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public void resetPercent() { |
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percent = 0;
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} |
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|
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.util.IHistogramable#getPercent()
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*/
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public int getPercent() { |
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return percent;
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} |
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|
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/*
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* (non-Javadoc)
|
| 443 |
* @see org.gvsig.raster.util.ICancellable#isCanceled()
|
| 444 |
*/
|
| 445 |
public boolean isCanceled() { |
| 446 |
return canceled;
|
| 447 |
} |
| 448 |
|
| 449 |
/*
|
| 450 |
* (non-Javadoc)
|
| 451 |
* @see org.gvsig.raster.util.ICancellable#setCanceled(boolean)
|
| 452 |
*/
|
| 453 |
public void setCanceled(boolean value) { |
| 454 |
canceled = value; |
| 455 |
} |
| 456 |
} |