    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/ogcwebservices/wms/GraphicContextFactory.java $
    002    /*----------------------------------------------------------------------------
    003     This file is part of deegree, http://deegree.org/
    004     Copyright (C) 2001-2009 by:
    005       Department of Geography, University of Bonn
    006     and
    007       lat/lon GmbH
    008
    009     This library is free software; you can redistribute it and/or modify it under
    010     the terms of the GNU Lesser General Public License as published by the Free
    011     Software Foundation; either version 2.1 of the License, or (at your option)
    012     any later version.
    013     This library is distributed in the hope that it will be useful, but WITHOUT
    014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
    016     details.
    017     You should have received a copy of the GNU Lesser General Public License
    018     along with this library; if not, write to the Free Software Foundation, Inc.,
    019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    020
    021     Contact information:
    022
    023     lat/lon GmbH
    024     Aennchenstr. 19, 53177 Bonn
    025     Germany
    026     http://lat-lon.de/
    027
    028     Department of Geography, University of Bonn
    029     Prof. Dr. Klaus Greve
    030     Postfach 1147, 53001 Bonn
    031     Germany
    032     http://www.geographie.uni-bonn.de/deegree/
    033
    034     e-mail: info@deegree.org
    035    ----------------------------------------------------------------------------*/
    036    package org.deegree.ogcwebservices.wms;
    037
    038    import static java.awt.image.DataBuffer.TYPE_BYTE;
    039    import static java.awt.image.Raster.createBandedRaster;
    040
    041    import java.awt.Graphics;
    042    import java.awt.image.BufferedImage;
    043    import java.awt.image.ColorModel;
    044
    045    import javax.media.jai.PlanarImage;
    046
    047    import org.apache.batik.dom.GenericDOMImplementation;
    048    import org.apache.batik.svggen.SVGGraphics2D;
    049    import org.w3c.dom.DOMImplementation;
    050    import org.w3c.dom.Document;
    051
    052    /**
    053     *
    054     *
    055     * @version $Revision: 18195 $
    056     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
    057     */
    058    public class GraphicContextFactory {
    059
    060        /**
    061         * creates a graphic target object for the passed mime type. The target will be the object where to render the to. A
    062         * <tt>BufferedImage</tt> for raster image mime types and a DOM <tt>Document</tt> for SVG.
    063         *
    064         * @param mimeType
    065         *            mime type to create a object for
    066         * @param width
    067         *            width of the desired target object
    068         * @param height
    069         *            height of the desired target object
    070         *
    071         * @return object to render to
    072         */
    073        public static synchronized Object createGraphicTarget( String mimeType, int width, int height ) {
    074            // to avoid errors:
    075            mimeType = mimeType.toLowerCase();
    076
    077            Object o = null;
    078            if ( mimeType.equals( "image/jpg" ) || mimeType.equals( "image/jpeg" ) || mimeType.equals( "image/bmp" )
    079                 || mimeType.equals( "image/tif" ) || mimeType.equals( "image/tiff" ) ) {
    080                o = new BufferedImage( width, height, BufferedImage.TYPE_INT_RGB );
    081            } else if ( mimeType.equals( "image/gif" ) || mimeType.equals( "image/png" )
    082                        || mimeType.equals( "image/png; mode=24bit" ) ) {
    083                o = new BufferedImage( width, height, BufferedImage.TYPE_INT_ARGB );
    084            } else if ( mimeType.equals( "image/svg+xml" ) || mimeType.equals( "image/svg xml" ) ) {
    085                // Get a DOMImplementation
    086                DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
    087
    088                // Create an instance of org.w3c.dom.Document
    089                o = domImpl.createDocument( null, "svg", null );
    090            } else if ( mimeType.equals( "image/png; mode=8bit" ) ) {
    091                ColorModel cm = PlanarImage.getDefaultColorModel( TYPE_BYTE, 4 );
    092                o = new BufferedImage( cm, createBandedRaster( TYPE_BYTE, width, height, 4, null ), false, null );
    093            }
    094
    095            return o;
    096        }
    097
    098        /**
    099         * creates a graphic context for the passed target considering the passed mime type
    100         *
    101         * @param mimeType
    102         *            mime type of the graphic (target)
    103         * @param target
    104         *            object to render to.
    105         *
    106         * @return graphic context of the target
    107         */
    108        public static synchronized Graphics createGraphicContext( String mimeType, Object target ) {
    109            // to avoid errors:
    110            mimeType = mimeType.toLowerCase();
    111
    112            Graphics g = null;
    113
    114            if ( mimeType.equals( "image/jpg" ) || mimeType.equals( "image/jpeg" ) || mimeType.equals( "image/bmp" )
    115                 || mimeType.equals( "image/tif" ) || mimeType.equals( "image/tiff" ) || mimeType.equals( "image/gif" )
    116                 || mimeType.equals( "image/png" ) || mimeType.equals( "image/png; mode=8bit" )
    117                 || mimeType.equals( "image/png; mode=24bit" ) ) {
    118                g = ( (BufferedImage) target ).getGraphics();
    119            } else if ( mimeType.equals( "image/svg+xml" ) || mimeType.equals( "image/svg xml" ) ) {
    120                // Create an instance of the SVG Generator
    121                g = new SVGGraphics2D( (Document) target );
    122            }
    123
    124            return g;
    125        }
    126    }