svn-gvsig-desktop / trunk / libraries / libRaster / src / org / gvsig / raster / datastruct / ColorTable.java @ 13396
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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 java.util.Arrays; |
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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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protected 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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* 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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private int errorColor = 8; |
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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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/**
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* Crea una paleta a traves de una lista de colores y se le puede especificar
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* si queremos que la comprima o no.
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* @param colorItems
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* @param compress
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*/
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public void createPaletteFromColorItems(ArrayList colorItems, boolean compress) { |
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this.colorItems = colorItems;
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// Ordena la paleta
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sortPalette(colorItems); |
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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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if (compress)
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compressPalette(colorItems); |
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// Genera la paleta final para poder ser usada
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applyPalette(colorItems); |
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} |
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private boolean isEqualColor(Color c1, Color c2, int error) { |
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if ((c2 == null) && (c1 != null)) |
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return false; |
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if ((c1 == null) && (c2 != null)) |
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return false; |
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if (c2.getRed() < (c1.getRed() - error))
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return false; |
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if (c2.getGreen() < (c1.getGreen() - error))
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return false; |
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if (c2.getBlue() < (c1.getBlue() - error))
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return false; |
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if (c2.getAlpha() < (c1.getAlpha() - error))
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return false; |
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if (c2.getRed() > (c1.getRed() + error))
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return false; |
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if (c2.getGreen() > (c1.getGreen() + error))
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return false; |
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if (c2.getBlue() > (c1.getBlue() + error))
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return false; |
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if (c2.getAlpha() > (c1.getAlpha() + error))
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return false; |
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return true; |
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} |
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/**
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* Informa de si el color c3 se encuentra en un rango valido entre c1 y c2.
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* Para colores con nombre de clase se devolver? false para no eliminar nunca
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* ese item. Para colores con interpolacion distinta al 50% tambien
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* devolveremos false.
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* @param c1
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* @param c2
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* @param c3
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* @return
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*/
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private boolean isCorrectColor(ColorItem c1, ColorItem c2, ColorItem c3) { |
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if ((c3.getNameClass() != null) && (c3.getNameClass().length() > 0)) |
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return false; |
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if (c3.getInterpolated() != 50) |
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return false; |
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if (c2.getInterpolated() != 50) |
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return false; |
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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, errorColor);
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} |
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private boolean canDelete(int first, int last) { |
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ColorItem c1 = (ColorItem) getColorItems().get(first); |
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ColorItem c2 = (ColorItem) getColorItems().get(last); |
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for (int i = (first + 1); i < last; i++) { |
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if (!isCorrectColor(c1, c2, (ColorItem) getColorItems().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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public void compressPalette() { |
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compressPalette(colorItems); |
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} |
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public boolean isCompressible() { |
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ArrayList cloneList = (ArrayList) getColorItems().clone(); |
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compressPalette(cloneList); |
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return (cloneList.size() != getColorItems().size());
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} |
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private void compressPalette(ArrayList colorItems) { |
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int size = -1; |
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while (size != colorItems.size()) {
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int init = 0; |
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int posMax = 2; |
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size = colorItems.size(); |
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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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/**
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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(colorItems); |
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//compressPalette();
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applyPalette(colorItems); |
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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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* (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 (colorItems != null) { |
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clone.colorItems = new ArrayList(); |
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for (int i = 0; i < colorItems.size(); i++) { |
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clone.colorItems.add(((ColorItem) colorItems.get(i)).clone()); |
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} |
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} |
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clone.interpolated = interpolated; |
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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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if (range != null) |
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clone.range = (double[]) range.clone(); |
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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 (colorItems.size() <= 0) |
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return Color.black; |
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if ((pos + 1) == colorItems.size()) |
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return ((ColorItem) colorItems.get(pos)).getColor();
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if (value <= ((ColorItem) colorItems.get(0)).getValue()) |
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return ((ColorItem) colorItems.get(0)).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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double perc1, perc2;
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if (percValue > item2.getInterpolated()) {
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color1 = halfColor; |
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color2 = item2.getColor(); |
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perc1 = item2.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 = item2.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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/*
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* TODO: RENDIMIENTO: Incluir una heuristica que dado un valor se compare con
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* el valor de la mitad de la tabla y si es menor se empieza a recorrer desde
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* el principio sino se empieza a recorrer desde la mitad de la tabla hasta
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* abajo. Esto hace que se reduzca la tabla a la mitad de valores haciendo
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* 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[] getRGBAByBand(double value) { |
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for (int i = 1; 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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* TODO: Usar el m?todo Quicksort para ordenar
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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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private void sortPalette(ArrayList colorItems) { |
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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(ArrayList colorItems) { |
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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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|
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if (colorItems.size()==0) |
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return;
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|
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// Nos preparamos para hacer las particiones, sabiendo el minimo y maximo
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double min = ((ColorItem) colorItems.get(0)).getValue(); |
| 474 |
double max = ((ColorItem) colorItems.get(colorItems.size() - 1)).getValue(); |
| 475 |
|
| 476 |
if (min > max) {
|
| 477 |
double aux = max;
|
| 478 |
max = min; |
| 479 |
min = aux; |
| 480 |
} |
| 481 |
|
| 482 |
Color color = Color.white; |
| 483 |
Color colorOld = null; |
| 484 |
|
| 485 |
// Hacemos las particiones, metiendo cada item calculado en un array
|
| 486 |
int defaultColors = RasterLibrary.defaultNumberOfColors;
|
| 487 |
for (int i = 0; i < defaultColors; i++) { |
| 488 |
double value = min + ((i * (max - min)) / (defaultColors - 1)); |
| 489 |
int pos = 0; |
| 490 |
for (int j = 1; j <= colorItems.size(); j++) { |
| 491 |
if (j < colorItems.size()) {
|
| 492 |
if (value < ((ColorItem) colorItems.get(j)).getValue()) {
|
| 493 |
pos = j - 1;
|
| 494 |
break;
|
| 495 |
} |
| 496 |
} else {
|
| 497 |
pos = j - 1;
|
| 498 |
break;
|
| 499 |
} |
| 500 |
} |
| 501 |
|
| 502 |
// Calculamos el color que corresponde, tanto interpolado como no
|
| 503 |
if (interpolated) {
|
| 504 |
color = interpolatedColor(value, pos); |
| 505 |
} else {
|
| 506 |
if ((pos + 1) < colorItems.size()) { |
| 507 |
double min2 = ((ColorItem) colorItems.get(pos)).getValue();
|
| 508 |
double max2 = ((ColorItem) colorItems.get(pos + 1)).getValue(); |
| 509 |
if ((min2 + ((max2 - min2) * ((ColorItem) colorItems.get(pos + 1)).getInterpolated() / 100)) < value) |
| 510 |
pos++; |
| 511 |
} |
| 512 |
color = ((ColorItem) colorItems.get(pos)).getColor(); |
| 513 |
} |
| 514 |
|
| 515 |
if (!isEqualColor(color, colorOld, 0)) { |
| 516 |
ColorItem colorItem = new ColorItem();
|
| 517 |
colorItem.setNameClass("");
|
| 518 |
colorItem.setValue(value); |
| 519 |
colorItem.setColor(color); |
| 520 |
arrayColors.add(colorItem); |
| 521 |
} |
| 522 |
|
| 523 |
colorOld = color; |
| 524 |
} |
| 525 |
|
| 526 |
// Una vez tenemos una paleta de 256 colores o inferior, rellenamos
|
| 527 |
// los siguientes valores para hacer busquedas rapidas.
|
| 528 |
|
| 529 |
paletteByBand = new byte[arrayColors.size()][4]; |
| 530 |
range = new double[arrayColors.size()]; |
| 531 |
nameClass = new String[arrayColors.size()]; |
| 532 |
|
| 533 |
for (int i = 0; i < arrayColors.size(); i++) { |
| 534 |
paletteByBand[i][0] = (byte) ((ColorItem) arrayColors.get(i)).getColor().getRed(); |
| 535 |
paletteByBand[i][1] = (byte) ((ColorItem) arrayColors.get(i)).getColor().getGreen(); |
| 536 |
paletteByBand[i][2] = (byte) ((ColorItem) arrayColors.get(i)).getColor().getBlue(); |
| 537 |
paletteByBand[i][3] = (byte) ((ColorItem) arrayColors.get(i)).getColor().getAlpha(); |
| 538 |
range[i] = ((ColorItem) arrayColors.get(i)).getValue(); |
| 539 |
nameClass[i] = ((ColorItem) arrayColors.get(i)).getNameClass(); |
| 540 |
} |
| 541 |
} |
| 542 |
|
| 543 |
public double[] getRange() { |
| 544 |
return range;
|
| 545 |
} |
| 546 |
|
| 547 |
public void setRange(double[] range) { |
| 548 |
this.range = range;
|
| 549 |
} |
| 550 |
|
| 551 |
/**
|
| 552 |
* Devuelve un ArrayList con cada ColorItem de la tabla de color
|
| 553 |
* @return
|
| 554 |
*/
|
| 555 |
public ArrayList getColorItems() { |
| 556 |
return colorItems;
|
| 557 |
} |
| 558 |
|
| 559 |
/**
|
| 560 |
* Nos indica si la paleta la ha generado con valores interpolados o no.
|
| 561 |
* @return
|
| 562 |
*/
|
| 563 |
public boolean isInterpolated() { |
| 564 |
return interpolated;
|
| 565 |
} |
| 566 |
|
| 567 |
/**
|
| 568 |
* Definir si la paleta tendra los valores interpolados o no
|
| 569 |
* @param interpolated
|
| 570 |
*/
|
| 571 |
public void setInterpolated(boolean interpolated) { |
| 572 |
this.interpolated = interpolated;
|
| 573 |
applyPalette(colorItems); |
| 574 |
} |
| 575 |
|
| 576 |
/*
|
| 577 |
* (non-Javadoc)
|
| 578 |
* @see java.lang.Object#hashCode()
|
| 579 |
*/
|
| 580 |
public int hashCode() { |
| 581 |
final int PRIME = 31; |
| 582 |
int result = 1; |
| 583 |
result = PRIME * result + ((colorItems == null) ? 0 : colorItems.hashCode()); |
| 584 |
result = PRIME * result + errorColor; |
| 585 |
result = PRIME * result + ((filePath == null) ? 0 : filePath.hashCode()); |
| 586 |
result = PRIME * result + (interpolated ? 1231 : 1237); |
| 587 |
result = PRIME * result + ((name == null) ? 0 : name.hashCode()); |
| 588 |
result = PRIME * result + ColorTable.hashCode(nameClass); |
| 589 |
result = PRIME * result + ColorTable.hashCode(paletteByBand); |
| 590 |
result = PRIME * result + ColorTable.hashCode(range); |
| 591 |
return result;
|
| 592 |
} |
| 593 |
|
| 594 |
private static int hashCode(Object[] array) { |
| 595 |
final int PRIME = 31; |
| 596 |
if (array == null) |
| 597 |
return 0; |
| 598 |
int result = 1; |
| 599 |
for (int index = 0; index < array.length; index++) { |
| 600 |
result = PRIME * result + (array[index] == null ? 0 : array[index].hashCode()); |
| 601 |
} |
| 602 |
return result;
|
| 603 |
} |
| 604 |
|
| 605 |
private static int hashCode(double[] array) { |
| 606 |
final int PRIME = 31; |
| 607 |
if (array == null) |
| 608 |
return 0; |
| 609 |
int result = 1; |
| 610 |
for (int index = 0; index < array.length; index++) { |
| 611 |
long temp = Double.doubleToLongBits(array[index]); |
| 612 |
result = PRIME * result + (int) (temp ^ (temp >>> 32)); |
| 613 |
} |
| 614 |
return result;
|
| 615 |
} |
| 616 |
|
| 617 |
/*
|
| 618 |
* (non-Javadoc)
|
| 619 |
* @see java.lang.Object#equals(java.lang.Object)
|
| 620 |
*/
|
| 621 |
public boolean equals(Object obj) { |
| 622 |
if (this == obj) |
| 623 |
return true; |
| 624 |
if (obj == null) |
| 625 |
return false; |
| 626 |
if (getClass() != obj.getClass())
|
| 627 |
return false; |
| 628 |
final ColorTable other = (ColorTable) obj;
|
| 629 |
|
| 630 |
if ( ((colorItems == null) && (other.colorItems != null)) || |
| 631 |
((colorItems != null) && (other.colorItems == null)) ) |
| 632 |
return false; |
| 633 |
|
| 634 |
if (colorItems != null) { |
| 635 |
if (colorItems.size() != other.colorItems.size())
|
| 636 |
return false; |
| 637 |
for (int i = 0; i < colorItems.size(); i++) { |
| 638 |
if (!((ColorItem) colorItems.get(i)).equals(other.colorItems.get(i)))
|
| 639 |
return false; |
| 640 |
} |
| 641 |
} |
| 642 |
|
| 643 |
if (filePath == null) { |
| 644 |
if (other.filePath != null) |
| 645 |
return false; |
| 646 |
} else if (!filePath.equals(other.filePath)) |
| 647 |
return false; |
| 648 |
if (name == null) { |
| 649 |
if (other.name != null) |
| 650 |
return false; |
| 651 |
} else if (!name.equals(other.name)) |
| 652 |
return false; |
| 653 |
|
| 654 |
if (nameClass != null) { |
| 655 |
if (nameClass.length != other.nameClass.length)
|
| 656 |
return false; |
| 657 |
|
| 658 |
for (int i = 0; i < nameClass.length; i++) { |
| 659 |
if (!nameClass[i].equals(other.nameClass[i]))
|
| 660 |
return false; |
| 661 |
} |
| 662 |
} |
| 663 |
|
| 664 |
if ( ((paletteByBand == null) && (other.paletteByBand != null)) || |
| 665 |
((paletteByBand != null) && (other.paletteByBand == null)) ) |
| 666 |
return false; |
| 667 |
|
| 668 |
if (paletteByBand != null) { |
| 669 |
for (int i = 0; i < paletteByBand.length; i++) { |
| 670 |
for (int j = 0; j < paletteByBand[i].length; j++) { |
| 671 |
if (paletteByBand[i][j] != other.paletteByBand[i][j])
|
| 672 |
return false; |
| 673 |
} |
| 674 |
} |
| 675 |
} |
| 676 |
|
| 677 |
if (!Arrays.equals(range, other.range)) |
| 678 |
return false; |
| 679 |
|
| 680 |
if ( ((colorItems == null) && (other.colorItems != null)) || |
| 681 |
((colorItems != null) && (other.colorItems == null)) ) |
| 682 |
return false; |
| 683 |
|
| 684 |
return true; |
| 685 |
} |
| 686 |
} |