org.mapfish.print.map.renderers.BitmapMapRenderer.java Source code

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Here is the source code for org.mapfish.print.map.renderers.BitmapMapRenderer.java

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/*
 * Copyright (C) 2008  Camptocamp
 *
 * This file is part of MapFish Server
 *
 * MapFish Server is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MapFish Server 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with MapFish Server.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.mapfish.print.map.renderers;

import com.lowagie.text.DocumentException;
import com.lowagie.text.Image;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfGState;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Polygon;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.mapfish.print.RenderingContext;
import org.mapfish.print.Transformer;
import org.mapfish.print.PDFUtils;

import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.io.IOException;
import java.net.URI;
import java.util.List;

public class BitmapMapRenderer extends MapRenderer {
    private static final Log LOGGER = LogFactory.getLog(BitmapMapRenderer.class);

    public void render(Transformer transformer, List<URI> uris, PdfContentByte dc, RenderingContext context,
            float opacity, int nbTilesHorizontal, float offsetX, float offsetY, long bitmapTileW, long bitmapTileH)
            throws IOException {
        dc.saveState();
        try {
            final AffineTransform bitmapTransformer = transformer.getBitmapTransform();
            dc.transform(bitmapTransformer);
            final double rotation = transformer.getRotation();

            for (int i = 0; i < uris.size(); i++) {
                URI uri = uris.get(i);
                if (uri == null) {
                    continue;
                }

                final int line = i / nbTilesHorizontal;
                final int col = i % nbTilesHorizontal;
                final float posX = 0 - offsetX + col * bitmapTileW;
                final float posY = 0 - offsetY + line * bitmapTileH;

                if (rotation != 0.0
                        && !isTileVisible(posX, posY, bitmapTileW, bitmapTileH, bitmapTransformer, transformer)) {
                    if (LOGGER.isDebugEnabled()) {
                        LOGGER.debug("Not needed: " + uri);
                    }
                    continue;
                }

                LOGGER.debug(uri);
                final Image map = PDFUtils.getImage(context, uri, bitmapTileW, bitmapTileH);
                map.setAbsolutePosition(posX, posY);

                if (opacity < 1.0) {
                    PdfGState gs = new PdfGState();
                    gs.setFillOpacity(opacity);
                    gs.setStrokeOpacity(opacity);
                    dc.setGState(gs);
                }
                dc.addImage(map);
            }
        } catch (DocumentException e) {
            context.addError(e);
        } finally {
            dc.restoreState();
        }
    }

    private boolean isTileVisible(float x, float y, long w, long h, AffineTransform bitmapTransformer,
            Transformer transformer) {
        GeometryFactory gf = new GeometryFactory();
        Polygon page = gf.createPolygon(gf.createLinearRing(new Coordinate[] {
                new Coordinate(transformer.getPaperPosX(), transformer.getPaperPosY()),
                new Coordinate(transformer.getPaperPosX() + transformer.getPaperW(), transformer.getPaperPosY()),
                new Coordinate(transformer.getPaperPosX() + transformer.getPaperW(),
                        transformer.getPaperPosY() + transformer.getPaperH()),
                new Coordinate(transformer.getPaperPosX(), transformer.getPaperPosY() + transformer.getPaperH()),
                new Coordinate(transformer.getPaperPosX(), transformer.getPaperPosY()), }), null);

        Point2D.Float ll = new Point2D.Float();
        Point2D.Float lr = new Point2D.Float();
        Point2D.Float ur = new Point2D.Float();
        Point2D.Float ul = new Point2D.Float();
        bitmapTransformer.transform(new Point2D.Float(x, y), ll);
        bitmapTransformer.transform(new Point2D.Float(x + w, y), lr);
        bitmapTransformer.transform(new Point2D.Float(x + w, y + h), ur);
        bitmapTransformer.transform(new Point2D.Float(x, y + h), ul);
        Polygon tile = gf
                .createPolygon(
                        gf.createLinearRing(new Coordinate[] { new Coordinate(ll.getX(), ll.getY()),
                                new Coordinate(lr.getX(), lr.getY()), new Coordinate(ur.getX(), ur.getY()),
                                new Coordinate(ul.getX(), ul.getY()), new Coordinate(ll.getX(), ll.getY()), }),
                        null);

        return page.intersects(tile);
    }
}