root / trunk / libraries / libCq_CMS_praster / src / org / cresques / io / data / RasterizeGrid.java @ 8026
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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.cresques.io.data; |
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import org.cresques.io.Rasterizer; |
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/**
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* Salva a raster un objeto Grid.
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* Sirve datos solicitados por los drivers que salvan a raster.
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* Hereda de Rasterizer y reescribe el m?todo readData que es el que
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* ser? llamado desde el driver cada vez que vacie el buffer y
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* necesite m?s datos.
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*
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* @author Nacho Brodin (brodin_ign@gva.es)
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*/
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public class RasterizeGrid extends Rasterizer{ |
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public static final int BLOCKSIZE = 512; |
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/**
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* N?mero de bloques totales a leer del grid
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*/
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private int nBlocks = 0; |
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/**
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* Tama?o en pixeles del ?ltimo bloque
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*/
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private int sizeLastBlock = 0; |
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/**
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* Posici?n y del grid donde se ha quedado la lectura para que el la siguiente
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* petici?n se sirva desde donde se qued? la ?ltima vez.
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*/
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private int line = 0; |
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/**
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* Buffer con los datos del grid
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*/
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private RasterBuf rasterBuf = null; |
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/**
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* Bandas a salvar. Si vale null se salvar?n todas las del rasterBuf sino se har?
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* una selecci?n. Cada elemento del array es una banda del rasterBuf y el valor del contenido
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* es la posici?n en la que se salva.
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*/
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private int[] bands = null; |
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/**
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* Cuando se desea salvar un raster con una sola banda del rasterBuf bands valdr? null y se
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* usar? band para saber que banda del rasterBuf se va a salvar. Esto indica usando el constructor
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* adecuado.
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*/
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private int band = 0; |
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/**
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* Constructor
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* @param grid Grid desde donde se leen los datos
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* @param bands Bandas a salvar. Si vale null se salvar?n todas las del rasterBuf sino se har?
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* una selecci?n. Cada elemento del array es una banda del rasterBuf y el valor del contenido
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* es la posici?n en la que se salva.
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*/
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public RasterizeGrid(RasterBuf rasterBuf, int[] bands){ |
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super(BLOCKSIZE);
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this.bands = bands;
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//Cuando bands es null es que entran todas las bandas
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if(bands == null){ |
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bands = new int[rasterBuf.getBandCount()]; |
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for (int iBand = 0; iBand < rasterBuf.getBandCount(); iBand++) |
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bands[iBand] = iBand; |
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} |
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init(rasterBuf); |
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} |
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/**
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* Constructor
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* @param rasterBuf RasterBuf desde donde se leen los datos
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* @param bands Bandas a salvar. Si vale null se salvar?n todas las del rasterBuf sino se har?
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* una selecci?n. Cada elemento del array es una banda del rasterBuf y el valor del contenido
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* es la posici?n en la que se salva.
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*/
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public RasterizeGrid(RasterBuf rasterBuf, int band){ |
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super(BLOCKSIZE);
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this.band = band;
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init(rasterBuf); |
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} |
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/**
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* Inicializa el n?mero de bloques y el tama?o del ?ltimo. Asigna el grid
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* y el rasterbuf desde el que se obtienen los datos.
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* @param grid
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*/
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public void init(RasterBuf rasterBuf){ |
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this.rasterBuf = rasterBuf;;
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nBlocks = (int)(rasterBuf.getHeight() / BLOCKSIZE);
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sizeLastBlock = (rasterBuf.getHeight() - (nBlocks * BLOCKSIZE)); |
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nBlocks ++; |
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.IDataWriter#readData(int, int, int)
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*/
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public int[] readARGBData(int sX, int sY, int nBand){ |
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return null; |
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} |
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/**
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* Lee los datos tipo byte del grid de ancho sizeX y alto sizeY desde la posici?n
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* indicada en la variable de instancia "line". El array bands dice que bandas del
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* rasterBuf va a ser salvadas, en caso de que bands sea null significa que solo vamos
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* a salvar una banda del rasterBuf con lo que usaremos la variable band que indica que
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* banda hay que salvar.
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*/
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public byte[][] readByteData(int sizeX, int sizeY) { |
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byte[][] buffer = null; |
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int cont = 0; |
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if(bands != null){ |
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buffer = new byte[bands.length][sizeX * sizeY]; |
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for (int iBand = 0; iBand < bands.length; iBand++){ |
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cont = 0;
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[iBand][cont] = rasterBuf.getElemByte(iRow, iCol, iBand); |
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cont ++; |
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} |
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} |
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} |
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}else{
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buffer = new byte[1][sizeX * sizeY]; |
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[0][cont] = rasterBuf.getElemByte(iRow, iCol, band);
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cont ++; |
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} |
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} |
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} |
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line += sizeY; |
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return buffer;
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} |
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public short[][] readShortData(int sizeX, int sizeY) { |
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short[][] buffer = null; |
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int cont = 0; |
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if(bands != null){ |
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buffer = new short[bands.length][sizeX * sizeY]; |
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for (int iBand = 0; iBand < bands.length; iBand++){ |
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cont = 0;
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[iBand][cont] = rasterBuf.getElemShort(iRow, iCol, iBand); |
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cont ++; |
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} |
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} |
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} |
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}else{
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buffer = new short[1][sizeX * sizeY]; |
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[0][cont] = rasterBuf.getElemShort(iRow, iCol, band);
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cont ++; |
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} |
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} |
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} |
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line += sizeY; |
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return buffer;
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} |
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public int[][] readIntData(int sizeX, int sizeY) { |
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int[][] buffer = null; |
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int cont = 0; |
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if(bands != null){ |
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buffer = new int[bands.length][sizeX * sizeY]; |
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for (int iBand = 0; iBand < bands.length; iBand++){ |
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cont = 0;
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[iBand][cont] = rasterBuf.getElemInt(iRow, iCol, iBand); |
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cont ++; |
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} |
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} |
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} |
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}else{
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buffer = new int[1][sizeX * sizeY]; |
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[0][cont] = rasterBuf.getElemInt(iRow, iCol, band);
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cont ++; |
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} |
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} |
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} |
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line += sizeY; |
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return buffer;
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} |
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public float[][] readFloatData(int sizeX, int sizeY) { |
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float[][] buffer = null; |
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int cont = 0; |
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if(bands != null){ |
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buffer = new float[bands.length][sizeX * sizeY]; |
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for (int iBand = 0; iBand < bands.length; iBand++){ |
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cont = 0;
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[iBand][cont] = rasterBuf.getElemFloat(iRow, iCol, iBand); |
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cont ++; |
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} |
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} |
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} |
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}else{
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buffer = new float[1][sizeX * sizeY]; |
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[0][cont] = rasterBuf.getElemFloat(iRow, iCol, band);
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cont ++; |
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} |
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} |
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} |
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line += sizeY; |
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return buffer;
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} |
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public double[][] readDoubleData(int sizeX, int sizeY) { |
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double[][] buffer = null; |
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int cont = 0; |
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if(bands != null){ |
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buffer = new double[bands.length][sizeX * sizeY]; |
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for (int iBand = 0; iBand < bands.length; iBand++){ |
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cont = 0;
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[iBand][cont] = rasterBuf.getElemDouble(iRow, iCol, iBand); |
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cont ++; |
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} |
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} |
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} |
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}else{
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buffer = new double[1][sizeX * sizeY]; |
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for(int iRow = line; iRow < (line + sizeY); iRow ++){ |
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for(int iCol = 0; iCol < sizeX; iCol ++){ |
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buffer[0][cont] = rasterBuf.getElemDouble(iRow, iCol, band);
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cont ++; |
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} |
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} |
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} |
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line += sizeY; |
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return buffer;
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} |
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} |