gvsig-raster / org.gvsig.raster / trunk / org.gvsig.raster / org.gvsig.raster.lib / org.gvsig.raster.lib.impl / src / main / java / org / gvsig / raster / impl / store / properties / DataStoreTransparency.java @ 162
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.raster.impl.store.properties; |
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import java.util.ArrayList; |
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import org.gvsig.fmap.dal.coverage.RasterLibrary; |
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import org.gvsig.fmap.dal.coverage.dataset.Buffer; |
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import org.gvsig.fmap.dal.coverage.datastruct.TransparencyRange; |
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import org.gvsig.fmap.dal.coverage.grid.GridTransparency; |
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import org.gvsig.fmap.dal.coverage.store.props.Transparency; |
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import org.gvsig.fmap.dal.coverage.util.PropertyEvent; |
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import org.gvsig.fmap.dal.coverage.util.PropertyListener; |
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import org.gvsig.raster.impl.DefaultRasterManager; |
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import org.gvsig.raster.impl.grid.GridTransparencyImpl; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dynobject.DynStruct; |
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import org.gvsig.tools.persistence.PersistenceManager; |
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import org.gvsig.tools.persistence.Persistent; |
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import org.gvsig.tools.persistence.PersistentState; |
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import org.gvsig.tools.persistence.exception.PersistenceException; |
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/**
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* <p>
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* Esta clase contiene informaci?n de transparencia de un objeto. Los objetos
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* pueden ser dataset, grid u otros. Cuando un usuario quiere a?adir nueva
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* informaci?n de transparencia crea un objeto de este tipo que debe ser
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* mezclado (merge) con otros objetos de este tipo que existan para la misma
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* fuente de datos.
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* </p>
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* <p>
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* Un multirasterdatset obtiene los distintos objetos transparency de todos los
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* ficheros que los componen. Para realizar un solo objeto transparency se har?
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* un merge de todos ellos.
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* </p>
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* <p>
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* Finalmente y antes de renderizar se necesita un objeto GridTransparency. Este
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* estar? compuesto con toda la informaci?n de transparencia aplicar, es decir,
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* todos los objetos Transparency mezclados. GridTransparency con tiene el
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* m?todo de procesado de un pixel. Se le proporciona un pixel y devuelve este
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* mismo pixel con la transparencia aplicada.
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* </p>
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* <p>
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* Una transparencia que se aplica a un buffer puede tener cuatro procedencias distintas:
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* <UL>
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* <LI>Mascara: Un buffer de NxN aplicado sobre la zona a renderizar como una m?scara de
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* transparencia. Las bandas alpha de las imagenes se comportan de esta forma.</LI>
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* <LI>Opacidad global: Un valor de opacidad se aplicado a cada pixel a renderizar. Este es
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* igual para todos los p?xeles.</LI>
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* <LI>Rangos: Una lista de rangos de valores RGB. Cada pixel cuyo valor est? dentro de alguno
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* de los rangos se aplica como transparente.</LI>
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* <LI>Dato: Todos los valores del buffer que coincidan con ese dato son puestos como transparente.
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* Para que esto sea posible tenemos que disponer del buffer de datos originales sin ning?n proceso.</LI>
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* </UL>
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* </p>
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*
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* @version 07/06/2007
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class DataStoreTransparency implements Transparency, Persistent { |
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public static final String PERSISTENCE_NAME = "Transparency_Persistent"; |
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public static int MAX_OPACITY = 255; |
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protected int alphaBandNumber = -1; |
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/**
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* Buffer con la banda alpha correspondiente a la zona a renderizar
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*/
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private Buffer mask = null; |
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/**
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* Buffer con los datos originales (sin filtrar) correspondiente a la zona a renderizar.
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* Esto es util para aplicar el valor NoData ya que hay que consultar el valor original del
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* dato. Despu?s de hacer un process es recomendable hacer free para poner a null los buffers.
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*/
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protected Buffer originalData = null; |
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/**
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* Valor de dato transparente. Todos los p?xeles de originalData que correspondan con este
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* valor se pondr?n 100% transparentes.
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*/
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protected double noData = RasterLibrary.defaultNoDataValue; |
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/**
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* Flag que indica que el uso de noData para transparencia est? activo
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*/
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protected boolean noDataActive = false; |
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/**
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* Rangos de transparencia aplicados. Lista de TransparencyRange
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*/
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protected ArrayList<TransparencyRange> |
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transparencyRanges = new ArrayList<TransparencyRange>(); |
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/**
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* Grado de opacidad de todo el raster
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*/
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protected int opacity = 0xff; |
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/**
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* Array de listeners que ser?n informados cuando cambia la propiedad de transparencia
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*/
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private ArrayList<PropertyListener> |
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transparencyPropertyListener = new ArrayList<PropertyListener>(); |
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/**
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* Constructor
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*/
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public DataStoreTransparency() {
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} |
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/**
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* Constructor de copia
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*/
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@SuppressWarnings("unchecked") |
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public DataStoreTransparency(Transparency tParam) { |
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DataStoreTransparency t = null;
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if(tParam instanceof DataStoreTransparency) |
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t = (DataStoreTransparency)tParam; |
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else
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return;
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//TODO: FUNCIONALIDAD: Falta asignar lo necesario para la transparencia por selecci?n
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this.transparencyRanges = (ArrayList<TransparencyRange>) t.getTransparencyRange().clone(); |
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this.mask = t.getAlphaBand();
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this.opacity = t.getOpacity();
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this.alphaBandNumber = t.alphaBandNumber;
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this.noData = t.getNoData();
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this.noDataActive = t.isNoDataActive();
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this.originalData = t.originalData;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#addPropertyListener(PropertyListener)
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*/
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public void addPropertyListener(PropertyListener listener) { |
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transparencyPropertyListener.add(listener); |
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} |
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/**
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* M?todo llamado cuando hay un cambio en una propiedad de transparencia
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*/
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private void callPropertyChanged(Object obj) { |
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for (int i = 0; i < transparencyPropertyListener.size(); i++) { |
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PropertyEvent ev = new PropertyEvent(this, "transparency", null, null); |
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((PropertyListener)transparencyPropertyListener.get(i)).actionValueChanged(ev); |
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} |
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} |
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/**
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* Obtiene la m?scara asociada
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* @return M?scara de transparencia
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*/
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public Buffer getAlphaBand() { |
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return mask;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#setAlphaBand(org.gvsig.fmap.dal.coverage.dataset.Buffer)
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*/
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public void setAlphaBand(Buffer b) { |
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if(b == null && mask != null) { |
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mask = b; |
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callPropertyChanged(this);
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return;
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} else {
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mask = b; |
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if(b != null) |
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callPropertyChanged(this);
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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.fmap.dal.coverage.store.props.Transparency#existAlphaBand()
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*/
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public boolean existAlphaBand() { |
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return (mask != null); |
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} |
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/**
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* Obtiene el ?rea de datos
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* @return M?scara de transparencia
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*/
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public Buffer getDataBuffer() { |
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return originalData;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#setDataBuffer(org.gvsig.fmap.dal.coverage.dataset.Buffer)
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*/
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public void setDataBuffer(Buffer b) { |
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originalData = b; |
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} |
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/**
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* Obtiene la informaci?n de si existe o no la posibilidad de aplicar valore no data
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* como transparentes. Para ello tiene que estar activo su uso y el buffer debe contener datos
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* @return true si puede aplicarse noData y false si no se puede
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*/
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public boolean isNoDataActive() { |
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return noDataActive;
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} |
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/**
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* Obtiene el valor noData
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* @return
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*/
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public double getNoData() { |
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return noData;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#setNoData(double)
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*/
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public void setNoData(double noData) { |
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this.noDataActive = true; |
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if(this.noData != noData) |
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callPropertyChanged(this);
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this.noData = noData;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#activeNoData(boolean)
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*/
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public void activeNoData(boolean active) { |
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this.noDataActive = active;
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} |
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/**
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* Obtiene los rangos de pixels que son transparentes en el raster.
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* @return Rangos de transparencias a aplicar
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*/
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public ArrayList<TransparencyRange> getTransparencyRange() { |
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return transparencyRanges;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#setTransparencyRange(org.gvsig.fmap.dal.coverage.datastruct.TransparencyRange)
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*/
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public void setTransparencyRange(TransparencyRange range) { |
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this.transparencyRanges.add(range);
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callPropertyChanged(this);
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} |
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/**
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* Asigna la lista de rangos de transparencia
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* @param ranges
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*/
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public void setTransparencyRangeList(ArrayList<TransparencyRange> ranges) { |
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this.transparencyRanges = ranges;
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callPropertyChanged(this);
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#clearListOfTransparencyRange()
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*/
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public void clearListOfTransparencyRange() { |
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transparencyRanges.clear(); |
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callPropertyChanged(this);
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} |
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/**
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* Obtiene el grado de opacidad de todo el raster
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* @return valor del grado de opacidad.
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*/
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public int getOpacity() { |
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return opacity;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#setOpacity(int)
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*/
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public void setOpacity(int opacity) { |
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if(opacity != this.opacity) |
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callPropertyChanged(this);
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this.opacity = opacity;
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} |
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/**
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* Asigna la transparencia a partir de un objeto con los metadatos del raster.
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* @param metadata
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*/
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public void setTransparencyByPixelFromMetadata(DataStoreMetadata metadata){ |
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if (metadata != null) { |
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TransparencyRange[] noData = metadata.parserNodataInMetadata();
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if (noData != null) |
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for (int i = 0; i < noData.length; i++) |
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getTransparencyRange().add(noData[i]); |
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TransparencyRange noDataValue = metadata.parserNodataByBand(); |
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if (noData == null && noDataValue != null) |
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getTransparencyRange().add(noDataValue); |
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} |
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} |
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/**
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* Mezcla el alpha actual con el que nos pasan por parametro y se asigna
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* directamente a destino
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* @param buffer
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* @param dst
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*/
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public void mergeBuffer(Buffer buffer, Buffer dst) { |
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for (int y = 0; y < mask.getHeight(); y++) |
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for (int x = 0; x < mask.getWidth(); x++) |
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// ((a / 255) * (b / 255)) * 255
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// Es lo mismo que:
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// (a * b) / 255
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dst.setElem(y, x, 0,
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(byte) (((mask.getElemByte(y, x, 0) & 0xff) * (buffer.getElemByte(y, x, 0) & 0xff)) / 255D)); |
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} |
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/**
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* Mezcla un objeto Transparency con el actual
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* @param ts objeto TransparencyStatus
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*/
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public Transparency merge(Transparency tParam) { |
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DataStoreTransparency transp = null;
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if(tParam instanceof DataStoreTransparency) |
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transp = (DataStoreTransparency)tParam; |
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else
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return null; |
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DataStoreTransparency t = new DataStoreTransparency();
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// Mezclamos la opacidad
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double op1 = (double) opacity / (double) MAX_OPACITY; |
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double op2 = (double) transp.getOpacity() / (double) MAX_OPACITY; |
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t.setOpacity((int) (op1 * op2 * MAX_OPACITY));
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// Mezclamos los rangos de transparencia
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ArrayList<TransparencyRange> tr = transp.getTransparencyRange();
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for (int i = 0; i < tr.size(); i++) |
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transparencyRanges.add(tr.get(i)); |
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// TODO: FUNCIONALIDAD Mezclamos la m?scara
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if (mask != null && transp.getAlphaBand() != null) { |
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Buffer newMask = DefaultRasterManager.getInstance().createBuffer(Buffer.TYPE_BYTE, mask.getWidth(), mask.getHeight(), 1, true); |
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// Mezclamos alphaBand con el que nos pasan en transp y lo asignamos al nuevo buffer
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mergeBuffer(transp.getAlphaBand(), newMask); |
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t.setAlphaBand(newMask); |
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} else if (mask != null) { |
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t.setAlphaBand(mask); |
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t.alphaBandNumber = alphaBandNumber; |
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} else {
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t.setAlphaBand(transp.getAlphaBand()); |
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t.alphaBandNumber = transp.alphaBandNumber; |
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} |
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// TODO: FUNCIONALIDAD Mezclamos las ?reas
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// TODO: FUNCIONALIDAD Mezclamos las mascaras
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return t;
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} |
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/**
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* Obtiene la banda de transpareci si existe o -1 si no existe.
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* @return n?mero de banda de transparencia o -1 si no existe.
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*/
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public int getAlphaBandNumber() { |
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return alphaBandNumber;
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} |
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/**
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* Asigna la informaci?n de si existe o no banda de transparencia cuando este
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* objeto va asociado a un dataset. Si tiene este tipo de banda en cada
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* dibujado se cargar? la informaci?n de m?scara de transparencia en el la
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* variable mask.
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* @param true si existe banda de transparencia y false si no lo es.
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*/
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public void setTransparencyBand(int alphaBandNumber) { |
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this.alphaBandNumber = alphaBandNumber;
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} |
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/**
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* Consulta si el valor de la posici?n (line, col) del buffer es considerado
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* NoData o no.
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* @param line Linea del buffer
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* @param col Columna del buffer
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* @return
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*/
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protected boolean isNoData(int line, int col) { |
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switch (originalData.getDataType()) {
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case Buffer.TYPE_BYTE: |
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if((originalData.getElemByte(line, col, 0)) == noData) |
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return true; |
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break;
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case Buffer.TYPE_SHORT: |
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if((originalData.getElemShort(line, col, 0)) == noData) |
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return true; |
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break;
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case Buffer.TYPE_INT: |
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if((originalData.getElemInt(line, col, 0)) == noData) |
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return true; |
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break;
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case Buffer.TYPE_FLOAT: |
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if((originalData.getElemFloat(line, col, 0)) == noData) |
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return true; |
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break;
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case Buffer.TYPE_DOUBLE: |
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if((originalData.getElemDouble(line, col, 0)) == noData) |
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return true; |
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break;
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} |
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return false; |
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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.fmap.dal.coverage.store.props.Transparency#free()
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*/
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public void free() { |
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if (mask != null) |
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mask.free(); |
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if (originalData != null) |
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originalData.free(); |
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mask = null;
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originalData = null;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.tools.persistence.Persistent#loadFromState(org.gvsig.tools.persistence.PersistentState)
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*/
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@SuppressWarnings("unchecked") |
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public void loadFromState(PersistentState state) |
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throws PersistenceException {
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if (state.hasValue("opacity")){ |
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opacity = state.getInt("opacity");
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} |
| 451 |
transparencyRanges = new ArrayList<TransparencyRange>(state.getList("transparencyRange")); |
| 452 |
if (state.hasValue("bandnumber")){ |
| 453 |
alphaBandNumber = state.getInt("bandnumber");
|
| 454 |
} |
| 455 |
} |
| 456 |
|
| 457 |
/*
|
| 458 |
* (non-Javadoc)
|
| 459 |
* @see org.gvsig.tools.persistence.Persistent#saveToState(org.gvsig.tools.persistence.PersistentState)
|
| 460 |
*/
|
| 461 |
public void saveToState(PersistentState state) throws PersistenceException { |
| 462 |
if(getOpacity() != 255){ |
| 463 |
state.set("opacity", getOpacity());
|
| 464 |
} |
| 465 |
|
| 466 |
//Rangos de transparencia
|
| 467 |
state.set("transparencyRange", transparencyRanges);
|
| 468 |
|
| 469 |
if(getAlphaBandNumber() != -1) { |
| 470 |
state.set("bandnumber", getAlphaBandNumber());
|
| 471 |
} |
| 472 |
} |
| 473 |
|
| 474 |
/*
|
| 475 |
* (non-Javadoc)
|
| 476 |
* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#activeTransparency()
|
| 477 |
*/
|
| 478 |
public void activeTransparency() { |
| 479 |
|
| 480 |
} |
| 481 |
|
| 482 |
/*
|
| 483 |
* (non-Javadoc)
|
| 484 |
* @see org.gvsig.fmap.dal.coverage.store.props.Transparency#getGridTransparency()
|
| 485 |
*/
|
| 486 |
public GridTransparency getGridTransparency() {
|
| 487 |
return new GridTransparencyImpl(this); |
| 488 |
} |
| 489 |
|
| 490 |
public static void registerPersistent() { |
| 491 |
PersistenceManager manager = ToolsLocator.getPersistenceManager(); |
| 492 |
DynStruct definition = manager.addDefinition( |
| 493 |
Transparency.class,
|
| 494 |
PERSISTENCE_NAME, |
| 495 |
"Transparency Persistent definition (FIXME)",
|
| 496 |
null,
|
| 497 |
null
|
| 498 |
); |
| 499 |
definition.addDynFieldInt("opacity");
|
| 500 |
definition.addDynFieldInt("bandnumber");
|
| 501 |
definition.addDynFieldList("transparencyRange")
|
| 502 |
.setClassOfItems(TransparencyRange.class); |
| 503 |
} |
| 504 |
} |