svn-gvsig-desktop / tags / v1_1_Build_1011 / libraries / libCq_CMS_praster / src / org / cresques / io / JpegWriter.java @ 12904
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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 java.io.File; |
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import java.io.IOException; |
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import org.cresques.cts.IProjection; |
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import org.cresques.geo.ViewPortData; |
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import org.cresques.px.PxRaster; |
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import es.gva.cit.jgdal.Gdal; |
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import es.gva.cit.jgdal.GdalDriver; |
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import es.gva.cit.jgdal.GdalException; |
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/**
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* Driver para la escritura de Jpeg.
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* Este driver utiliza GdalWriter para salvar Jpeg.
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* La escritura de un jpeg no es posible utilizando un servidor de datos
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* como el que usan los drivers comunes por lo que ser? necesario salvar antes
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* a Tif con el driver de Gdal para posteriormente convertir la imagen completa
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* a jpg.
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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 JpegWriter extends GeoRasterWriter { |
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public final int windowSizeX = 386; |
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public final int windowSizeY = 220; |
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public final int panelSizeX = 358; |
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public final int panelSizeY = 125; |
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//Datos de registro de drivers
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static {
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GeoRasterWriter.registerWriterExtension("jpg", JpegWriter.class);
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//GeoRasterWriter.registerWriterExtension("jpeg", JpegWriter.class);
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typeList.put("jpg", "Jpeg"); |
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//typeList.put("jpeg", "Jpeg");
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} |
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private GdalWriter gdalWriter = null; |
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private JpegSupportOptions support = null; |
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private String outTif = null; |
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private String outJpg = null; |
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private String[] props = null; |
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private ViewPortData viewPort = null; |
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private String[] params = null; //Par?metros de creaci?n del dataset. |
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/**
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* Constructor para la obtenci?n de par?metros del driver
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* @param drvType Tipo de driver
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*/
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public JpegWriter(String fileName) { |
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ident = fileName.toLowerCase().substring(fileName.lastIndexOf(".") + 1); |
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driver = (String)typeList.get(ident);
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support = new JpegSupportOptions(driver);
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gdalWriter = new GdalWriter(fileName);
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gdalWriter.getSupport().setTfw(true);
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setParams(); |
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} |
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/**
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* Constructor para salvar una sola imagen completa
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* @param raster PxRaster de la imagen de origen
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* @param outfilename Nombre del fichero de salida
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* @param infilename Nombre del fichero de entrada
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* @param drvType Tipo de driver
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*/
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public JpegWriter(PxRaster raster, String outFileName, String inFileName) throws GdalException, IOException { |
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ident = inFileName.toLowerCase().substring(inFileName.lastIndexOf(".") + 1); |
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driver = (String)typeList.get(ident);
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support = new JpegSupportOptions(driver);
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gdalWriter = new GdalWriter(raster, outFileName, inFileName);
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gdalWriter.getSupport().setTfw(true);
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setParams(); |
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} |
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/**
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* Constructor para salvar datos servidos por el cliente
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* @param dataWriter Objeto servidor de datos para el driver de escritura
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* @param outSizeX N?mero de pixels en X de la imagen de salida
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* @param outSizeY N?mero de pixels en Y de la imagen de salida
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* @param outFilename Fichero de salida
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* @param extentMaxX Posici?n en X m?xima del extent
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* @param extentMinX Posici?n en X m?nima del extent
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* @param extentMaxY Posici?n en Y m?xima del extent
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* @param extentMinY Posici?n en Y m?nima del extent
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* @param nBands N?mero de bandas
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* @param drvType Tipo de driver
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* @throws GdalException
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* @throws IOException
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*/
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public JpegWriter( IDataWriter dataWriter,
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String outFileName,
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Integer blockSize,
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Integer nBands,
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ViewPortData vp, |
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Integer compresion,
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Integer outSizeX,
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Integer outSizeY,
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Integer dataType)throws GdalException, IOException { |
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ident = outFileName.toLowerCase().substring(outFileName.lastIndexOf(".") + 1); |
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driver = (String)typeList.get(ident);
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support = new JpegSupportOptions(driver);
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outJpg = outFileName; |
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outTif = outFileName.substring(0, outFileName.lastIndexOf(".") + 1); |
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outTif = outTif + "tif";
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this.viewPort = vp;
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gdalWriter = new GdalWriter(dataWriter, outTif, blockSize, nBands,
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vp, compresion, outSizeX, outSizeY, dataType); |
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gdalWriter.getSupport().setTfw(true);
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setParams(); |
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} |
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/**
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* Asigna el tipo de driver con el que se salvar? la imagen
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* @param drvType Tipo de driver
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*/
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public void setDriverType(String drvType) { |
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gdalWriter.setDriverType(drvType); |
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} |
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/**
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* A partir de un elemento que contiene una propiedad y un valor
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* lo parsea y asigna el valor a su variable.
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* @param propValue elemento con la forma propiedad=valor
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*/
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private void readProperty(String propValue) { |
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String prop = propValue.substring(0, propValue.indexOf("=")); |
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if (propValue.startsWith(prop)) {
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String value = propValue.substring(propValue.indexOf("=") + 1, |
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propValue.length()); |
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if ((value != null) && !value.equals("")) { |
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if (prop.equals("COMPRESSION")) |
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support.setCompressionDefault(Integer.parseInt(value));
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if (prop.equals("PROGRESSIVE")) { |
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boolean prog = true; |
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if (value.equals("yes")) { |
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prog = true;
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} else {
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prog = false;
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} |
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support.setProgressive(prog); |
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} |
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} |
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} |
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} |
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/**
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* Asigna propiedades al driver a partir de un vector de
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* strings donde cada elemento tiene la estructura de
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* propiedad=valor.
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* @param props Propiedades
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*/
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public void setProps(String[] props) { |
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this.props = props;
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for (int iProps = 0; iProps < props.length; iProps++) |
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readProperty(props[iProps]); |
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setParams(); |
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} |
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/**
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* Realiza la funci?n de compresi?n a partir de un GeoRasterFile.
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* @throws IOException
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*/
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public void fileWrite() throws IOException { |
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gdalWriter.fileWrite(); |
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} |
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/**
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* Realiza una copia en el formato especificado.
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* @throws IOException
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*/
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public static void createCopy(GdalDriver driverDst, String dst, String src, |
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boolean bstrict, String[] params, IProjection proj) throws IOException, GdalException { |
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GdalWriter.createCopy(driverDst, dst, src, bstrict, params, proj); |
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} |
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/**
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*Asigna par?metros de creaci?n del dataset de Gdal
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*/
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private void setParams() { |
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params = new String[3]; |
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params[0] = new String("WORLDFILE=ON"); |
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params[1] = new String("QUALITY=" + support.getCompressionRealValue()); |
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String prog = null; |
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if (support.isProgressive()) {
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prog = new String("ON"); |
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} else {
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prog = new String("NO"); |
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} |
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params[2] = new String("PROGRESSIVE=" + prog); |
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} |
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/**
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* Realiza la escritura de datos con los datos que le pasa el cliente.
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* @throws IOException
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*/
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public void dataWrite() throws IOException { |
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gdalWriter.dataWrite(); |
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if(gdalWriter.isWrite()){
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gdalWriter.writeClose(); |
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if(outTif != null){ |
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GdalDriver driver = null;
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try{
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driver = Gdal.getDriverByName("JPEG");
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GdalWriter.createCopy(driver, outJpg, outTif, false,
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params, viewPort.getProjection()); |
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}catch(GdalException exc){
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System.err.println("No se ha podido obtener el driver."); |
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} |
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File file = new File(outTif); |
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file.delete(); |
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} |
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} |
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} |
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/**
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* Cierra el compresor ecw.
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* @throws GdalException
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*/
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public void writeClose() { |
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//El close del tif se hizo en dataWrite
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} |
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/**
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* Cancela el salvado de datos.
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*/
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public void writeCancel() { |
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gdalWriter.setWrite(false);
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} |
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/**
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* Devuelve la configuraci?n de la ventana de dialogo
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* para las propiedades del driver de escritura de Gdal.
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* @return XML de configuraci?n del dialogo.
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*/
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public String getXMLPropertiesDialog() { |
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StringBuffer options = null; |
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options = new StringBuffer(); |
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options.append("<window sizex=\"" + windowSizeX + "\" sizey=\"" + |
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windowSizeY + "\">");
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options.append("<panel sizex=\"" + panelSizeX + "\" sizey=\"" + |
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panelSizeY + "\" layout=\"" + gdalWriter.panelLayout +
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"\" border=\"yes\">");
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options.append("<panel layout=\"FlowLayout\" position=\"North\" align=\"left\">");
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options.append("<label>block_size</label>");
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options.append("<combo ident=\"BLOCKSIZE\" selected=\"" +
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gdalWriter.getSupport().getBlockSize() + "\">");
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for (int i = 0; i < gdalWriter.getSupport().getBlockSizeList().length; i++) |
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options.append("<elem>" + gdalWriter.getSupport().getBlockSizeList()[i] +
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"</elem>");
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options.append("</combo>");
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options.append("</panel>");
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options.append("<panel layout=\"FlowLayout\" position=\"Center\">");
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options.append("<slider ident=\"COMPRESSION\" name=\"Compression\" sizex=\"370\" sizey=\"20\">");
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options.append("<min>" + support.getCompressionList()[0] + |
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"</min>");
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options.append("<max>" + support.getCompressionList()[1] + |
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"</max>");
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options.append("<value>" + support.getCompressionDefault() + "</value>"); |
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options.append("<minorspacing>" + support.getCompressionList()[3] + |
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"</minorspacing>");
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options.append("<majorspacing>" + support.getCompressionList()[4] + |
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"</majorspacing>");
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options.append("</slider>");
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options.append("</panel>");
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options.append("<panel layout=\"FlowLayout\" position=\"South\" align=\"left\">");
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options.append("<label>progressive</label>");
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String sel = null; |
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if (support.isProgressive()) {
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sel = new String("yes"); |
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} else {
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sel = new String("no"); |
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} |
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options.append("<check ident=\"PROGRESSIVE\" selected=\"" + sel +
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"\" text=\"\">");
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options.append("</check>");
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options.append("</panel>");
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options.append("</panel>");
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options.append("</window>");
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return options.toString();
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} |
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/**
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*
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* @author Nacho Brodin (brodin_ign@gva.es)
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*
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* Opciones que soporta el driver de escritura de Jpeg.
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*/
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public class JpegSupportOptions extends WriterSupportOptions { |
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private boolean progressive = true; |
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private String[] compresionListValues = { "10", "100", "16", "5", "30" }; //min, max, valor defecto, intervalo peque?o, intervalo grande; |
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private int compresionDefaultValue = 16; |
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public JpegSupportOptions(String ext) { |
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super(ext);
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} |
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/**
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* Obtiene la compresion seleccionada
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* @return Compresi?n seleccionada
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*/
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public int getCompressionDefault() { |
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return compresionDefaultValue;
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} |
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/**
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* Obtiene la compresion seleccionada en el valor real que necesita gdal. Por defecto gdal
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* tiene un valor de 75 en un rango de 10-100 donde 10 es la m?xima compresi?n.
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* Como el slider est? en un rango de 0-100 donde el 100 es la m?xima compresi?n y 0
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* la m?nima hay que hacer una conversi?n.
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* @return Compresi?n seleccionada
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*/
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public int getCompressionRealValue() { |
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return 110 - compresionDefaultValue; |
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} |
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/**
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* Obtiene la lista de los valores para la generaci?n de la barra de
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* compresi?n. Son cinco valores m?nimo, m?ximo, seleccionado,
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* intervalo peque?o, intervalo grande.
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* @return lista de valores de compresi?n
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*/
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public String[] getCompressionList() { |
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return compresionListValues;
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} |
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/**
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* Asigna el nivel de compresi?npor defecto
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* @param compress Nivel de compresi?n
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*/
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public void setCompressionDefault(int compress) { |
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this.compresionDefaultValue = compress;
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} |
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/**
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* Asigna la lista de valores de compresi?n
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* @param compresion lista de valores
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*/
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public void setCompressionList(String[] compresion) { |
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this.compresionListValues = compresion;
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} |
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public boolean isProgressive() { |
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return progressive;
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} |
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public void setProgressive(boolean progressive) { |
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this.progressive = progressive;
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} |
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} |
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} |