root / tags / v1_1_Build_1008 / libraries / libCq CMS for java.old / src / org / cresques / io / Rasterizer.java @ 12520
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/*
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* Cresques Mapping Suite. Graphic Library for constructing mapping applications.
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*
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* Copyright (C) 2004-5.
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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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* For more information, contact:
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*
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* cresques@gmail.com
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*/
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package org.cresques.io; |
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import org.cresques.geo.ViewPortData; |
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import org.cresques.px.Extent; |
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import org.cresques.px.PxLayerList; |
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import java.awt.Dimension; |
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import java.awt.Graphics2D; |
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import java.awt.image.BufferedImage; |
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import java.awt.image.WritableRaster; |
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/**
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* Sirve datos solicitados por los drivers que salvan a raster. Implementa
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* IDataWriter que obliga al m?todo readData que es el que ser? llamado
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* desde el driver cada vez que vacie el buffer y necesite m?s datos.
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* @author Nacho Brodin (brodin_ign@gva.es)
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*/
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public class Rasterizer implements IDataWriter { |
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private ViewPortData viewPort = null; |
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private ViewPortData viewPortBlock = null; |
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protected BufferedImage image; |
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private PxLayerList layerList;
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protected int sizeBlock = 0; |
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protected int lastBlock = 0; |
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protected WritableRaster raster = null; |
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protected int contBlocks = 1; |
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protected double wcIntervalo = 0; |
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protected int[] rasterData = null; |
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protected Dimension dimension = null; |
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protected int[] buffer; |
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protected double wcAlto = 0; |
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protected Graphics2D g; |
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/**
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* Constructor para las clases que hereden de esta
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* y redefinan la funcionalidad que sirve los datos. Estas
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* tampoco usaran el viewPort ya que se supone que disponen
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* de su propia estructura para la seleccion de la vista
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*/
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public Rasterizer(int sizeBlock) { |
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this.sizeBlock = sizeBlock;
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} |
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/**
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* Constructor
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* @param layerList
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* @param vp
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* @param sizeBlock
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*/
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public Rasterizer(PxLayerList layerList, ViewPortData vp, int sizeBlock) { |
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viewPort = (ViewPortData) vp.clone(); |
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//Calculo del viewPort del primer bloque
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wcAlto = viewPort.getExtent().maxY() - viewPort.getExtent().minY(); |
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wcIntervalo = (sizeBlock * wcAlto) / viewPort.getHeight(); |
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dimension = new Dimension((int) viewPort.getWidth(), sizeBlock); |
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calcViewPort(viewPort); |
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//Tama?o de ?ltimo bloque
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int nBlocks = (int) (vp.getHeight() / sizeBlock); |
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lastBlock = (int) (vp.getHeight() - (nBlocks * sizeBlock));
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this.layerList = layerList;
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this.sizeBlock = sizeBlock;
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//System.out.println("==>Iniciando servidor datos raster "+viewPort.getHeight()+" "+viewPort.getWidth()+" "+wcIntervalo +"..."+viewPortBlock.getExtent().maxX()+" - "+viewPortBlock.getExtent().maxY()+" - "+viewPortBlock.getExtent().minX()+" - "+viewPortBlock.getExtent().minY());
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} |
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/**
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* Calculo del viewPort de cada bloque que vamos salvando a raster
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* @param vp viewPort
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*/
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private void calcViewPort(ViewPortData vp) { |
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Extent ext = null;
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if (viewPortBlock == null) { //Primer bloque |
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ext = new Extent(Math.round(vp.getExtent().minX()), |
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Math.round(vp.getExtent().maxY()),
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Math.round(vp.getExtent().maxX()),
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Math.round(vp.getExtent().maxY() - wcIntervalo));
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} else { //Bloques siguientes |
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ext = new Extent(Math.round(vp.getExtent().minX()), |
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Math.round(vp.getExtent().minY()),
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Math.round(vp.getExtent().maxX()),
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Math.round(vp.getExtent().minY() - wcIntervalo));
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} |
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viewPortBlock = new ViewPortData(vp.getProjection(), ext, dimension);
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viewPortBlock.zoom(ext); |
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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[] readData(int sX, int sY, int nBand) { |
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if (nBand == 0) { //Con nBand==0 se devuelven las 3 bandas |
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//image = new BufferedImage((int)this.viewPortBlock.getWidth(), (int)this.viewPortBlock.getHeight(), BufferedImage.TYPE_INT_RGB);
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image = new BufferedImage(sX, sY, BufferedImage.TYPE_INT_RGB); |
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g = (Graphics2D) image.getGraphics();
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layerList.draw(g, viewPortBlock); |
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rasterData = image.getRGB(0, 0, sX, sY, rasterData, 0, sX); |
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//System.out.println("==>Cargando bloque ..."+(int)this.viewPortBlock.getWidth()+" * "+(int)this.viewPortBlock.getHeight()+" * "+viewPortBlock.getExtent().maxX()+" - "+viewPortBlock.getExtent().maxY()+" - "+viewPortBlock.getExtent().minX()+" - "+viewPortBlock.getExtent().minY());
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//System.out.println("==>Escribiendo linea ...0 - 0 - "+sX+" - "+sY+" - "+contBlocks);
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//Calculamos el viewPort del sgte bloque
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if (((contBlocks + 1) * sizeBlock) <= viewPort.getHeight()) { |
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dimension = new Dimension(sX, sY); |
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} else { //Calculo de la altura del ?ltimo bloque |
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dimension = new Dimension(sX, |
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(int) (viewPort.getHeight() -
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(contBlocks * sizeBlock))); |
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wcIntervalo = (lastBlock * wcAlto) / viewPort.getHeight(); |
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} |
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calcViewPort(viewPortBlock); |
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contBlocks++; |
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return rasterData;
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} |
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return null; |
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} |
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/**
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* Asigna el ancho del bloque
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* @param sizeBlock Ancho del bloque en pixeles
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*/
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public void setSizeBlock(int sizeBlock) { |
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this.sizeBlock = sizeBlock;
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} |
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} |