PdfRenderer.java

/**
 * OrbisGIS is a java GIS application dedicated to research in GIScience.
 * OrbisGIS is developed by the GIS group of the DECIDE team of the 
 * Lab-STICC CNRS laboratory, see <http://www.lab-sticc.fr/>.
 *
 * The GIS group of the DECIDE team is located at :
 *
 * Laboratoire Lab-STICC – CNRS UMR 6285
 * Equipe DECIDE
 * UNIVERSITÉ DE BRETAGNE-SUD
 * Institut Universitaire de Technologie de Vannes
 * 8, Rue Montaigne - BP 561 56017 Vannes Cedex
 * 
 * OrbisGIS is distributed under GPL 3 license.
 *
 * Copyright (C) 2007-2014 CNRS (IRSTV FR CNRS 2488)
 * Copyright (C) 2015-2017 CNRS (Lab-STICC UMR CNRS 6285)
 *
 * This file is part of OrbisGIS.
 *
 * OrbisGIS is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * OrbisGIS is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * OrbisGIS. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, please consult: <http://www.orbisgis.org/>
 * or contact directly:
 * info_at_ orbisgis.org
 */
package org.orbisgis.core_export;

import com.itextpdf.text.pdf.PdfTemplate;
import java.awt.Graphics2D;
import java.sql.ResultSet;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.orbisgis.coremap.map.MapTransform;
import org.orbisgis.coremap.renderer.Renderer;
import org.orbisgis.coremap.renderer.se.Symbolizer;

/**
 * This renderer is used to generate rendered-layers in a way
 * that a GeoPDF can use to offer interactivity
 *
 * @author Maxence Laurent
 */
public class PdfRenderer extends Renderer {

    private PdfTemplate pdfTemplate;
    private float height;
    private float width;
    //private MapTransform mt;
    private Map<Integer, Graphics2D> g2Levels;
    private Graphics2D baseG2;

    public PdfRenderer(PdfTemplate pdfTemplate, float width, float height) {
        super();
        this.height = height;
        this.width = width;
        this.pdfTemplate = pdfTemplate;
        g2Levels = null;
        baseG2 = null;
    }

    @Override
    protected Graphics2D getGraphics2D(Symbolizer s) {
        Graphics2D get = g2Levels.get(s.getLevel());
        return get;
    }

    @Override
    protected void initGraphics2D(List<Symbolizer> symbs, Graphics2D g2, MapTransform mt) {
        g2Levels = new HashMap<Integer, Graphics2D>();

        baseG2 = pdfTemplate.createGraphics(width, height);

        //HashMap<Integer, Graphics2D> g2Level = new HashMap<Integer, Graphics2D>();
        List<Integer> levels = new LinkedList<Integer>();

        /**
         * Create one buffered image for each level present in the style. This
         * way allows to render all symbolizer in one pass without encountering
         * layer level issues
         */
        for (Symbolizer s : symbs) {
            //Graphics2D sG2;
            // Does the level of the current symbolizer already have a graphic2s ?
            if (!levels.contains(s.getLevel())) {
                // It's a new level => register level
                levels.add(s.getLevel());
            }
        }

        Collections.sort(levels);

        for (Integer level : levels) {
            Graphics2D sg2 = (Graphics2D) baseG2.create();
            sg2.addRenderingHints(mt.getRenderingHints());
            g2Levels.put(level, sg2);
        }
    }

    @Override
    public void disposeLayer(Graphics2D g2) {
        baseG2.dispose();
        g2Levels.clear();
    }

    @Override
    protected void releaseGraphics2D(Graphics2D g2) {
    }

    @Override
    public void beginLayer(String name) {
    }

    @Override
    public void endLayer(String name) {
    }

    @Override
    protected void beginFeature(long id, ResultSet rs) {
    }

    @Override
    protected void endFeature(long id, ResultSet rs) {
    }
}