root / trunk / libraries / libRaster / src / org / gvsig / raster / datastruct / ColorTable.java @ 12504
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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) 2006 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.datastruct; |
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import java.awt.Color; |
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import java.util.ArrayList; |
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import org.gvsig.raster.RasterLibrary; |
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import es.gva.cit.jgdal.GdalColorEntry; |
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import es.gva.cit.jgdal.GdalColorTable; |
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import es.gva.cit.jgdal.GdalException; |
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/**
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* Paleta para raster. Esta consta de los valores RGB de la paleta que son
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* almacenados en un vector donde cada elemento contiene en su interior el RGB
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* completo y del vector de rangos.
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*
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* @version 04/07/2007
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* @author Nacho Brodin (nachobrodin@gmail.com)
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* @author BorSanZa - Borja S?nchez Zamorano (borja.sanchez@iver.es)
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*/
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public class ColorTable implements Cloneable { |
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/**
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* Lista de ColorItem donde estaran todos los valores de la paleta segun
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* el interfaz
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*/
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private ArrayList colorItems = null; |
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/**
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* Booleano que define si se interpolaran los valores de la paleta.
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*/
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protected boolean interpolated = true; |
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/**
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* Lista de rangos para paletas decimales
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*/
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protected double[] range = null; |
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/**
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* Lista de valores RGB
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*/
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protected byte[][] paletteByBand = null; |
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/**
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* Nombre de la clase asociada a la entrada
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*/
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protected String[] nameClass = null; |
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/**
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* Lista con todas las transparencias de la paleta
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*/
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protected ArrayList transparencyRange = new ArrayList(); |
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/**
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* Nombre de la paleta
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*/
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protected String name = null; |
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/**
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* Ruta del fichero a la cual se asocia la paleta. Las bandas de un
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* GeoRasterMultiFile han de saber a que paleta van asociadas.
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*/
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protected String filePath = null; |
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/**
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* Constructor vac?o.
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* @param name
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*/
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public ColorTable() {
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this.name = ""; |
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} |
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/**
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* Constructor. Asigna el nombre de la paleta.
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* @param name
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*/
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public ColorTable(String name) { |
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this.name = name;
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} |
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/**
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* Asigna el nombre de la paleta
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* @param Nombre de la paleta
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*/
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public void setName(String name) { |
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this.name = name;
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} |
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/**
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* Obtiene el nombre de la paleta
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* @return Nombre de la paleta
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*/
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public String getName() { |
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return name;
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} |
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public void createPaletteFromColorItems(ArrayList colorItems) { |
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this.colorItems = colorItems;
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// Ordena la paleta
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sortPalette(); |
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// System.out.println(name);
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// System.out.println("----- Sin comprimir (" + colorItems.size() + ") -----");
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/*
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if (name.equals("MDT1")) {
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for (int i=0; i<colorItems.size(); i++) {
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ColorItem c1 = ((ColorItem) colorItems.get(i));
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Color co = c1.getColor();
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System.out.println(c1.getValue() + ": " + co.getRed() + "," + co.getGreen() + "," + co.getBlue() + "," + co.getAlpha());
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}
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}
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*/
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// Mira que valores se pueden descartar y asi dejamos la paleta reducida
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// para poder hacer interpolaciones
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compressPalette(); |
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// System.out.println("------ Comprimido (" + colorItems.size() + ") ------");
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/*
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if (name.equals("MDT1")) {
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for (int i=0; i<colorItems.size(); i++) {
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ColorItem c1 = ((ColorItem) colorItems.get(i));
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Color co = c1.getColor();
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System.out.println(c1.getValue() + ": " + co.getRed() + "," + co.getGreen() + "," + co.getBlue() + "," + co.getAlpha());
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}
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}
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*/
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// Genera la paleta final para poder ser usada
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applyPalette(); |
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} |
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int error = 8; |
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private boolean isEqualColor(Color c1, Color c2) { |
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if (c2.getRed() < (c1.getRed() - error)) return false; |
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if (c2.getGreen() < (c1.getGreen() - error)) return false; |
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if (c2.getBlue() < (c1.getBlue() - error)) return false; |
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if (c2.getAlpha() < (c1.getAlpha() - error)) return false; |
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if (c2.getRed() > (c1.getRed() + error)) return false; |
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if (c2.getGreen() > (c1.getGreen() + error)) return false; |
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if (c2.getBlue() > (c1.getBlue() + error)) return false; |
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if (c2.getAlpha() > (c1.getAlpha() + error)) return false; |
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return true; |
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} |
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private boolean isCorrectColor(ColorItem c1, ColorItem c2, ColorItem c3) { |
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double max = c2.getValue()-c1.getValue();
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int r = c1.getColor().getRed() + (int) (((c2.getColor().getRed() - c1.getColor().getRed()) * (c3.getValue() - c1.getValue())) / max); |
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int g = c1.getColor().getGreen() + (int) (((c2.getColor().getGreen() - c1.getColor().getGreen()) * (c3.getValue() - c1.getValue())) / max); |
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int b = c1.getColor().getBlue() + (int) (((c2.getColor().getBlue() - c1.getColor().getBlue()) * (c3.getValue() - c1.getValue())) / max); |
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int a = c1.getColor().getAlpha() + (int) (((c2.getColor().getAlpha() - c1.getColor().getAlpha()) * (c3.getValue() - c1.getValue())) / max); |
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Color aux = new Color(r & 0xff, g & 0xff, b & 0xff, a & 0xff); |
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return isEqualColor(c3.getColor(), aux);
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} |
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private boolean canDelete(int first, int last) { |
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ColorItem c1 = (ColorItem) colorItems.get(first); |
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ColorItem c2 = (ColorItem) colorItems.get(last); |
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for (int i = (first + 1); i < last; i++) { |
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if (!isCorrectColor(c1, c2, (ColorItem) colorItems.get(i)))
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return false; |
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} |
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return true; |
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} |
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private void compressPalette() { |
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int init = 0; |
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int posMax = 2; |
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while (init < colorItems.size()) {
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if ((posMax < colorItems.size()) && canDelete(init, posMax)) {
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posMax++; |
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continue;
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} |
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if ((init + 2) < posMax) { |
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if (canDelete(init, posMax - 1)) |
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for (int i = (posMax - 2); i > init; i--) |
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if (i < colorItems.size())
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colorItems.remove(i); |
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} |
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init++; |
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posMax = init + 2;
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} |
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} |
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/**
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* Crea una paleta a partir de un objeto GdalColorTable. Esto es necesario
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* para los ficheros que tienen una paleta asignada, como los gif, y que son
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* tratados por Gdal. Se pasa la tabla de color le?da desde gdal y se crea
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* directamente un objeto Palette.
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* @param table
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*/
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public void createPaletteFromGdalColorTable(GdalColorTable table) { |
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try {
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colorItems = new ArrayList(); |
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for (int iEntry = 0; iEntry < table.getColorEntryCount(); iEntry++) { |
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GdalColorEntry entry = table.getColorEntryAsRGB(iEntry); |
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ColorItem colorItem = new ColorItem();
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colorItem.setNameClass("");
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colorItem.setValue(iEntry); |
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colorItem.setColor(new Color( (int) (entry.c1 & 0xff), |
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(int) (entry.c2 & 0xff), |
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(int) (entry.c3 & 0xff), |
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(int) (entry.c4 & 0xff))); |
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colorItems.add(colorItem); |
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} |
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} catch (GdalException ex) {
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// No se crea la paleta
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} |
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sortPalette(); |
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applyPalette(); |
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} |
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/**
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* Obtiene la transparencia por rangos asociada a la tabla de color actual.
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* @return Lista de objetos TransparencyRange
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*/
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public ArrayList getTransparencyRanges() { |
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return transparencyRange;
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} |
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/**
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* Carga una paleta desde el fichero .rmf asociado a la imagen
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* @param file nombre del fichero de imagen
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*/
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public void loadPaletteFromRMF(String file) { |
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//TODO: FUNCIONALIDAD: Implemetar cargar paleta desde .rmf
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} |
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/**
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* Salva una paleta desde al fichero .rmf asociado a la imagen
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* @param file nombre del fichero de imagen
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*/
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public void savePaletteToRMF(String file) { |
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//TODO: FUNCIONALIDAD: Implemetar salvar paleta a .rmf
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} |
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/**
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* Obtiene la tabla de color
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* @return Paleta
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*/
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/*
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public int[] getColorTable() {
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return palette;
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}
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*/
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/**
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* Obtiene la tabla de color por banda
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* @return Paleta
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*/
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public byte[][] getColorTableByBand() { |
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return paletteByBand;
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} |
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/**
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* Asigna una paleta
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* @param palette Paleta
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*/
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public void setColorTable(int[] palette) { |
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paletteByBand = new byte[palette.length][3]; |
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for (int i = 0; i < palette.length; i++) { |
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paletteByBand[i][0] = (byte)((palette[i] & 0x00ff0000) >> 16); |
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paletteByBand[i][1] = (byte)((palette[i] & 0x0000ff00) >> 8); |
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paletteByBand[i][2] = (byte)(palette[i] & 0x000000ff); |
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} |
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} |
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/**
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* Obtiene los nombres de las clases de la paleta
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* @return Array de cadenas. Cada una corresponde con un nombre de clase
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* que corresponde a cada rango de tipos.
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*/
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public String[] getNameClass() { |
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return nameClass;
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} |
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/**
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* Asigna los nombres de las clases de la paleta
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* @param names Array de cadenas. Cada una corresponde con un nombre de clase
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* que corresponde a cada rango de tipos.
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*/
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public void setNameClass(String[] names) { |
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nameClass = names; |
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} |
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/**
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* Obtiene la ruta del fichero al que va asociada la paleta.
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* @return Ruta del fichero al que va asociada la paleta.
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*/
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public String getFilePath() { |
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return filePath;
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} |
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/**
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* Asigna la ruta del fichero al que va asociada la paleta.
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* @param Ruta del fichero al que va asociada la paleta.
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*/
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public void setFilePath(String filePath) { |
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this.filePath = filePath;
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} |
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/**
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* Obtiene los rangos de transparencia que tiene la paleta. Estos se obtienen
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* en un array de objetos TransparencyRange. Cada uno de ellos representa un
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* rango de pixeles
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* @return ArrayList
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*/
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public ArrayList getTransparencyRange() { |
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return transparencyRange;
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} |
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/*
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* (non-Javadoc)
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* @see java.lang.Object#clone()
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*/
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public Object clone() { |
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ColorTable clone = null;
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try {
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clone = (ColorTable) super.clone();
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} catch (CloneNotSupportedException e) { |
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} |
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if (filePath != null) |
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clone.filePath = new String(filePath); |
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if (name != null) |
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clone.name = new String(name); |
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if (nameClass != null) { |
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clone.nameClass = new String[nameClass.length]; |
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for (int i = 0; i < nameClass.length; i++) |
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clone.nameClass[i] = new String(nameClass[i]); |
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} |
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if (paletteByBand != null) { |
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clone.paletteByBand = (byte[][]) paletteByBand.clone(); |
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for (int i = 0; i < paletteByBand.length; i++) |
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clone.paletteByBand[i] = (byte[]) paletteByBand[i].clone(); |
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} |
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return clone;
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} |
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/**
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* Devuelve un color de interpolacion entre dos colores
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* @param value
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* @param pos
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* @return
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*/
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private Color interpolatedColor(double value, int pos) { |
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if ((pos + 1) == colorItems.size()) |
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return ((ColorItem) colorItems.get(pos)).getColor();
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ColorItem item1 = (ColorItem) colorItems.get(pos); |
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ColorItem item2 = (ColorItem) colorItems.get(pos + 1);
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double percValue = ((value - item1.getValue()) * 100) / (item2.getValue() - item1.getValue()); |
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Color halfColor = new Color( |
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(item2.getColor().getRed() + item1.getColor().getRed()) >> 1,
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(item2.getColor().getGreen() + item1.getColor().getGreen()) >> 1,
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(item2.getColor().getBlue() + item1.getColor().getBlue()) >> 1,
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(item2.getColor().getAlpha() + item1.getColor().getAlpha()) >> 1);
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Color color1, color2;
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int perc1, perc2;
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if (percValue > item1.getInterpolated()) {
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color1 = halfColor; |
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color2 = item2.getColor(); |
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perc1 = item1.getInterpolated(); |
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perc2 = 100;
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} else {
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color1 = item1.getColor(); |
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color2 = halfColor; |
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perc1 = 0;
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perc2 = item1.getInterpolated(); |
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} |
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double percNew = (percValue - perc1) / (perc2 - perc1);
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Color newColor = new Color( |
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(int) (color1.getRed() + ((color2.getRed() - color1.getRed()) * percNew)) & 0xff, |
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(int) (color1.getGreen() + ((color2.getGreen() - color1.getGreen()) * percNew)) & 0xff, |
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(int) (color1.getBlue() + ((color2.getBlue() - color1.getBlue()) * percNew)) & 0xff, |
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(int) (color1.getAlpha() + ((color2.getAlpha() - color1.getAlpha()) * percNew)) & 0xff); |
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return newColor;
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} |
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/*
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* TODO: RENDIMIENTO: Incluir una heuristica que dado un valor se compare con el
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* valor de la mitad de la tabla y si es menor se empieza a recorrer desde el principio
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* sino se empieza a recorrer desde la mitad de la tabla hasta abajo. Esto hace
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* que se reduzca la tabla a la mitad de valores haciendo solo una comparaci?n.
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*/
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/**
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* Obtiene el valor RGB para un clave entera pasada por par?metro
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* @param value clave de la cual se quiere obtener el valor RGB de la paleta
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* @return valor RGB
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*/
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public byte[] getRGBByBand(double value) { |
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int init = 1; |
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for (int i = init; i <= range.length; i++) { |
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if (i < range.length) {
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if (value < range[i])
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return paletteByBand[i - 1]; |
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} else {
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return paletteByBand[i - 1]; |
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} |
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} |
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return new byte[4]; |
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} |
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|
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/**
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* Ordena el ColorItems de manera ascendente. De momento se usa el m?todo de
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* ordenaci?n por burbuja.
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*/
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// TODO: Usar el m?todo Quicksort para ordenar
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private void sortPalette() { |
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for (int i = 0; i < colorItems.size(); i++) { |
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for (int j = i + 1; j < colorItems.size(); j++) { |
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if (((ColorItem) colorItems.get(j)).getValue() < ((ColorItem) colorItems.get(i)).getValue()) {
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Object aux = colorItems.get(i);
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colorItems.set(i, colorItems.get(j)); |
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colorItems.set(j, aux); |
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} |
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} |
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} |
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} |
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/**
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* Genera una paleta intermedia para acelerar los calculos.
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*/
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private void applyPalette() { |
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ArrayList arrayColors = new ArrayList(); |
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paletteByBand = new byte[0][3]; |
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range = new double[0]; |
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nameClass = new String[0]; |
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|
| 464 |
if (colorItems.size()==0) |
| 465 |
return;
|
| 466 |
|
| 467 |
// Nos preparamos para hacer las particiones, sabiendo el minimo y maximo
|
| 468 |
double min = ((ColorItem) colorItems.get(0)).getValue(); |
| 469 |
double max = ((ColorItem) colorItems.get(colorItems.size() - 1)).getValue(); |
| 470 |
|
| 471 |
if (min > max) {
|
| 472 |
double aux = max;
|
| 473 |
max = min; |
| 474 |
min = aux; |
| 475 |
} |
| 476 |
|
| 477 |
Color color = Color.white; |
| 478 |
Color colorOld = null; |
| 479 |
|
| 480 |
// Hacemos las particiones, metiendo cada item calculado en un array
|
| 481 |
int defaultColors = RasterLibrary.defaultNumberOfColors;
|
| 482 |
for (int i = 0; i < defaultColors; i++) { |
| 483 |
double value = min + ((i * (max - min)) / (defaultColors - 1)); |
| 484 |
|
| 485 |
int pos = 0; |
| 486 |
for (int j = 1; j <= colorItems.size(); j++) { |
| 487 |
if (j < colorItems.size()) {
|
| 488 |
if (value < ((ColorItem) colorItems.get(j)).getValue()) {
|
| 489 |
pos = j - 1;
|
| 490 |
break;
|
| 491 |
} |
| 492 |
} else {
|
| 493 |
pos = j - 1;
|
| 494 |
break;
|
| 495 |
} |
| 496 |
} |
| 497 |
|
| 498 |
// Calculamos el color que corresponde, tanto interpolado como no
|
| 499 |
if (interpolated)
|
| 500 |
color = interpolatedColor(value, pos); |
| 501 |
else
|
| 502 |
color = ((ColorItem) colorItems.get(pos)).getColor(); |
| 503 |
|
| 504 |
if (!color.equals(colorOld)) {
|
| 505 |
ColorItem colorItem = new ColorItem();
|
| 506 |
colorItem.setNameClass("");
|
| 507 |
colorItem.setValue(value); |
| 508 |
colorItem.setColor(color); |
| 509 |
arrayColors.add(colorItem); |
| 510 |
} |
| 511 |
|
| 512 |
colorOld = color; |
| 513 |
} |
| 514 |
|
| 515 |
// Una vez tenemos una paleta de 256 colores o inferior, rellenamos
|
| 516 |
// los siguientes valores para hacer busquedas rapidas.
|
| 517 |
|
| 518 |
paletteByBand = new byte[arrayColors.size()][3]; |
| 519 |
range = new double[arrayColors.size()]; |
| 520 |
nameClass = new String[arrayColors.size()]; |
| 521 |
|
| 522 |
transparencyRange.clear(); |
| 523 |
for (int i = 0; i < arrayColors.size(); i++) { |
| 524 |
paletteByBand[i][0] = (byte) ((ColorItem) arrayColors.get(i)).getColor().getRed(); |
| 525 |
paletteByBand[i][1] = (byte) ((ColorItem) arrayColors.get(i)).getColor().getGreen(); |
| 526 |
paletteByBand[i][2] = (byte) ((ColorItem) arrayColors.get(i)).getColor().getBlue(); |
| 527 |
range[i] = ((ColorItem) arrayColors.get(i)).getValue(); |
| 528 |
nameClass[i] = ((ColorItem) arrayColors.get(i)).getNameClass(); |
| 529 |
if (((ColorItem) arrayColors.get(i)).getColor().getAlpha() != 255) { |
| 530 |
TransparencyRange r = new TransparencyRange();
|
| 531 |
r.setRed(new int[] { ((ColorItem) arrayColors.get(i)).getColor().getRed(), ((ColorItem) arrayColors.get(i)).getColor().getRed() }); |
| 532 |
r.setGreen(new int[] { ((ColorItem) arrayColors.get(i)).getColor().getGreen(), ((ColorItem) arrayColors.get(i)).getColor().getGreen() }); |
| 533 |
r.setBlue(new int[] { ((ColorItem) arrayColors.get(i)).getColor().getBlue(), ((ColorItem) arrayColors.get(i)).getColor().getBlue() }); |
| 534 |
r.setAlpha(((ColorItem) arrayColors.get(i)).getColor().getAlpha()); |
| 535 |
r.setAnd(true);
|
| 536 |
r.loadStrEntryFromValues(); |
| 537 |
transparencyRange.add(r); |
| 538 |
} |
| 539 |
} |
| 540 |
} |
| 541 |
|
| 542 |
public double[] getRange() { |
| 543 |
return range;
|
| 544 |
} |
| 545 |
|
| 546 |
public void setRange(double[] range) { |
| 547 |
this.range = range;
|
| 548 |
} |
| 549 |
|
| 550 |
public ArrayList getColorItems() { |
| 551 |
return colorItems;
|
| 552 |
} |
| 553 |
|
| 554 |
public boolean isInterpolated() { |
| 555 |
return interpolated;
|
| 556 |
} |
| 557 |
|
| 558 |
public void setInterpolated(boolean interpolated) { |
| 559 |
this.interpolated = interpolated;
|
| 560 |
applyPalette(); |
| 561 |
} |
| 562 |
} |