gvsig-raster / org.gvsig.raster / branches / org.gvsig.raster_dataaccess_refactoring / org.gvsig.raster.lib / org.gvsig.raster.lib.impl / src / main / java / org / gvsig / raster / impl / store / properties / DataStoreTransparency.java @ 2308
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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 java.util.List; |
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import org.gvsig.fmap.dal.coverage.dataset.Buffer; |
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import org.gvsig.fmap.dal.coverage.datastruct.NoData; |
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import org.gvsig.fmap.dal.coverage.datastruct.TransparencyRange; |
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import org.gvsig.fmap.dal.coverage.store.props.ColorInterpretation; |
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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.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 Transparency. 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.Transparency 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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* @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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|
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/**
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* Alpha source
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*/
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protected ColorInterpretation
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colorInterpretation = 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 NoData noData = null; |
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/**
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* Rangos de transparencia aplicados. Lista de TransparencyRange
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*/
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protected List<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 List<PropertyListener> |
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transparencyPropertyListener = new ArrayList<PropertyListener>(); |
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/**
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* Flag de activaci?n de la transparencia cuando se visualiza o exporta.
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*/
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private boolean transparencyActive = false; |
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/**
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* Constructor
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*/
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public DataStoreTransparency(ColorInterpretation colorInterpretation) {
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this.colorInterpretation = colorInterpretation;
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} |
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public static void mergeBuffers(Buffer src1, Buffer src2) { |
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for (int y = 0; y < src1.getHeight(); y++) |
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for (int x = 0; x < src1.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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src1.setElem(y, x, 0,
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(byte) (((src1.getElemByte(y, x, 0) & 0xff) * (src2.getElemByte(y, x, 0) & 0xff)) / 255D)); |
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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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public boolean existAlphaBand() { |
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return getAlphaBandNumber() >= 0; |
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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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public void setDataBuffer(Buffer b) { |
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originalData = b; |
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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 NoData getNoData() {
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return noData;
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} |
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public void setNoData(NoData noData) { |
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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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* 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 List<TransparencyRange> getTransparencyRange() { |
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return transparencyRanges;
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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(List<TransparencyRange> ranges) { |
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this.transparencyRanges = ranges;
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callPropertyChanged(this);
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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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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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* 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 colorInterpretation.getAlphaBand();
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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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colorInterpretation.setColorInterpValue(alphaBandNumber, ColorInterpretation.ALPHA_BAND); |
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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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if(noData == null) |
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return false; |
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switch (originalData.getDataType()) {
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case Buffer.TYPE_BYTE: |
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if(noData.isDefined() &&
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originalData.getElemByte(line, col, 0) == noData.getValue().byteValue())
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return true; |
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break;
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case Buffer.TYPE_SHORT: |
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if(noData.isDefined() &&
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originalData.getElemShort(line, col, 0) == noData.getValue().shortValue())
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return true; |
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break;
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case Buffer.TYPE_INT: |
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if(noData.isDefined() &&
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originalData.getElemInt(line, col, 0) == noData.getValue().intValue())
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return true; |
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break;
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case Buffer.TYPE_FLOAT: |
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float f = originalData.getElemFloat(line, col, 0); |
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if((noData.isDefined() &&
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f == noData.getValue().floatValue()) || Float.isNaN(f))
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return true; |
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break;
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case Buffer.TYPE_DOUBLE: |
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double d = originalData.getElemDouble(line, col, 0); |
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if((noData.isDefined() &&
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d == noData.getValue().doubleValue()) || Double.isNaN(d))
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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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public void activeTransparency() { |
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if( existAlphaBand() ||
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(getNoData() != null && getNoData().isDefined() && getNoData().isNoDataTransparent()) ||
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(transparencyRanges.size() > 0) ||
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(opacity != 0xff))
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transparencyActive = true;
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else
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transparencyActive = false;
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} |
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public boolean isTransparencyActive() { |
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return transparencyActive;
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} |
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/**
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* Asigna el flag de transparencia activa o desactivada.
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* @param transparencyActive true activa la transparencia false la desactiva
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*/
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public void setTransparencyActive(boolean transparencyActive) { |
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this.transparencyActive = transparencyActive;
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} |
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public int processRGB(int r, int g, int b, int line, int col, Buffer buf) { |
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// Si el valor es noData se pone totalmente transparente y ya no se tiene en
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// cuenta nada m?s.
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if (originalData != null && (getNoData().isDefined() && getNoData().isNoDataTransparent())) { |
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if (isNoData(line, col))
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// El alpha no se pone para dejarlo a 0, totalmente transparente
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return (r << 16 | g << 8 | b); |
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} |
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/**
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* Para sacar el valor del nuevo alpha, lo que hacemos es convertir a
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* porcentajes todos los alphas posibles (en porcentajes) y multiplicarlos
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* entre si. Con esto conseguimos un nuevo porcentaje de alpha entre 0 y 1.
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* Una vez hecho esto se multiplica por 255 para tenerlo dentro del rango
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* deseado. Como queremos evitar operaciones de m?s, podemos quitar una
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* division de 255 y as? nos ahorramos luego multiplicarlo por 255 otra vez.
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*/
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// Quitada la division para optimizar
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//double a = opacity / 255D;
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double a = opacity;
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int alphaRange = processRange(r, g, b);
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if (alphaRange != 255) |
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a *= (alphaRange / 255D);
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if (existAlphaBand() && buf != null) |
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a *= (buf.getElemByte(line, col, getAlphaBandNumber()) & 0xff) / 255D; |
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// Quitada la multiplicacion para optimizar
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// a = (int)(a * 255D);
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return ((int) a << 24) | r << 16 | g << 8 | b; |
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} |
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|
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/**
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* Aplica la transparecia por rangos al pixel pasado por par?metro. El valor
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* en la posici?n cero es el alpha por lo tanto ser? esta posici?n la que se
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* modificar?.
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* @param r
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* @param g
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* @param b
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* @return Un valor de 0 a 255. Donde 255 es totalmente opaco
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*/
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private int processRange(int r, int g, int b) { |
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for (int i = 0; i < transparencyRanges.size(); i++) { |
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TransparencyRange tr = ((TransparencyRange) transparencyRanges.get(i)); |
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if (tr == null) continue; |
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if (tr.isAnd()) {
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if (tr.getRed() == null || |
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tr.getGreen() == null ||
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tr.getBlue() == null ||
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r < tr.getRed()[0] || r > tr.getRed()[1] || |
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g < tr.getGreen()[0] || g > tr.getGreen()[1] || |
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b < tr.getBlue()[0] || b > tr.getBlue()[1]) |
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continue;
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return tr.getAlpha();
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} else {
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if (tr.getRed() != null) { |
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if (r >= tr.getRed()[0] && r <= tr.getRed()[1]) { |
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return tr.getAlpha();
|
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} |
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} |
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if (tr.getGreen() != null) { |
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if (g >= tr.getGreen()[0] && g <= tr.getGreen()[1]) { |
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return tr.getAlpha();
|
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} |
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} |
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if (tr.getBlue() != null) { |
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if (b >= tr.getBlue()[0] && b <= tr.getBlue()[1]) { |
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return tr.getAlpha();
|
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} |
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} |
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} |
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} |
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return 255; |
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} |
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public void setColorInterpretation(ColorInterpretation colorInterpretation) { |
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this.colorInterpretation = colorInterpretation;
|
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} |
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|
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@SuppressWarnings("unchecked") |
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public Transparency cloneTransparency() { |
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DataStoreTransparency t = new DataStoreTransparency(this.colorInterpretation.cloneColorInterpretation()); |
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|
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//TODO: FUNCIONALIDAD: Falta asignar lo necesario para la transparencia por selecci?n
|
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t.transparencyRanges = (ArrayList<TransparencyRange>)((ArrayList<TransparencyRange>) getTransparencyRange()).clone(); |
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//t.mask = getAlphaBand();
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t.opacity = getOpacity(); |
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t.noData = getNoData(); |
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t.originalData = originalData; |
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t.transparencyActive = transparencyActive; |
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t.activeTransparency(); |
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return t;
|
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} |
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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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} |
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|
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List<TransparencyRange> tr = state.getList("transparencyRange"); |
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if(tr != null) { |
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transparencyRanges = new ArrayList<TransparencyRange>(tr); |
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if (state.hasValue("bandnumber")) { |
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int alphaBandNumber = state.getInt("bandnumber"); |
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setTransparencyBand(alphaBandNumber); |
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} |
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} |
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|
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this.transparencyActive = state.getBoolean("transparencyActive"); |
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//this.noData = state.getDouble("noData");
|
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} |
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|
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public void saveToState(PersistentState state) throws PersistenceException { |
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if(getOpacity() != 255) { |
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state.set("opacity", getOpacity());
|
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} |
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|
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//Rangos de transparencia
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state.set("transparencyRange", transparencyRanges);
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|
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if(getAlphaBandNumber() != -1) { |
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state.set("bandnumber", getAlphaBandNumber());
|
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} |
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|
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state.set("transparencyActive", transparencyActive);
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//state.set("noData", noData);
|
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} |
| 453 |
|
| 454 |
public static void registerPersistence() { |
| 455 |
PersistenceManager manager = ToolsLocator.getPersistenceManager(); |
| 456 |
DynStruct definition = manager.addDefinition( |
| 457 |
DataStoreTransparency.class, |
| 458 |
PERSISTENCE_NAME, |
| 459 |
"Transparency Persistent definition (FIXME)",
|
| 460 |
null,
|
| 461 |
null
|
| 462 |
); |
| 463 |
definition.addDynFieldInt("opacity").setMandatory(false); |
| 464 |
definition.addDynFieldInt("bandnumber").setMandatory(false); |
| 465 |
definition.addDynFieldList("transparencyRange").setClassOfItems(TransparencyRange.class).setMandatory(false); |
| 466 |
definition.addDynFieldBoolean("transparencyActive").setMandatory(false); |
| 467 |
//definition.addDynFieldDouble("noData").setMandatory(false);
|
| 468 |
} |
| 469 |
|
| 470 |
public void dispose() { |
| 471 |
if (originalData != null) |
| 472 |
originalData.dispose(); |
| 473 |
originalData = null;
|
| 474 |
} |
| 475 |
|
| 476 |
public ColorInterpretation getColorInterpretation() {
|
| 477 |
return colorInterpretation;
|
| 478 |
} |
| 479 |
|
| 480 |
protected void finalize() throws Throwable { |
| 481 |
noData = null;
|
| 482 |
if(transparencyPropertyListener != null) { |
| 483 |
transparencyPropertyListener.clear(); |
| 484 |
transparencyPropertyListener = null;
|
| 485 |
} |
| 486 |
if(transparencyRanges != null) { |
| 487 |
transparencyRanges.clear(); |
| 488 |
transparencyRanges = null;
|
| 489 |
} |
| 490 |
super.finalize();
|
| 491 |
} |
| 492 |
|
| 493 |
} |