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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /* $Id$ */
-
- package org.apache.fop.image.loader.batik;
-
- import java.awt.Dimension;
- import java.awt.Graphics2D;
- import java.awt.geom.AffineTransform;
- import java.awt.geom.Rectangle2D;
- import java.util.Map;
-
- import org.apache.batik.bridge.BridgeContext;
- import org.apache.batik.bridge.GVTBuilder;
- import org.apache.batik.bridge.UserAgent;
- import org.apache.batik.dom.svg.SVGDOMImplementation;
- import org.apache.batik.gvt.GraphicsNode;
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.image.loader.Image;
- import org.apache.xmlgraphics.image.loader.ImageException;
- import org.apache.xmlgraphics.image.loader.ImageFlavor;
- import org.apache.xmlgraphics.image.loader.ImageProcessingHints;
- import org.apache.xmlgraphics.image.loader.impl.AbstractImageConverter;
- import org.apache.xmlgraphics.image.loader.impl.ImageGraphics2D;
- import org.apache.xmlgraphics.image.loader.impl.ImageXMLDOM;
- import org.apache.xmlgraphics.java2d.Graphics2DImagePainter;
- import org.apache.xmlgraphics.util.UnitConv;
-
- import org.apache.fop.svg.SimpleSVGUserAgent;
-
- /**
- * This ImageConverter converts SVG images to Java2D.
- * <p>
- * Note: The target flavor is "generic" Java2D. No Batik-specific bridges are hooked into the
- * conversion process. Specialized renderers may want to provide specialized adapters to profit
- * from target-format features (for example with PDF or PS). This converter is mainly for formats
- * which only support bitmap images or rudimentary Java2D support.
- */
- public class ImageConverterSVG2G2D extends AbstractImageConverter {
-
- /** logger */
- private static Log log = LogFactory.getLog(ImageConverterSVG2G2D.class);
-
- /** {@inheritDoc} */
- public Image convert(Image src, Map hints) throws ImageException {
- checkSourceFlavor(src);
- final ImageXMLDOM svg = (ImageXMLDOM)src;
- if (!SVGDOMImplementation.SVG_NAMESPACE_URI.equals(svg.getRootNamespace())) {
- throw new IllegalArgumentException("XML DOM is not in the SVG namespace: "
- + svg.getRootNamespace());
- }
-
- //Prepare
- float pxToMillimeter = UnitConv.IN2MM / 72; //default: 72dpi
- Number ptm = (Number)hints.get(ImageProcessingHints.SOURCE_RESOLUTION);
- if (ptm != null) {
- pxToMillimeter = (float)(UnitConv.IN2MM / ptm.doubleValue());
- }
- UserAgent ua = createBatikUserAgent(pxToMillimeter);
- GVTBuilder builder = new GVTBuilder();
- final BridgeContext ctx = new BridgeContext(ua);
-
- //Build the GVT tree
- final GraphicsNode root;
- try {
- root = builder.build(ctx, svg.getDocument());
- } catch (Exception e) {
- throw new ImageException("GVT tree could not be built for SVG graphic", e);
- }
-
- //Create the painter
- Graphics2DImagePainter painter = new Graphics2DImagePainter() {
-
- public void paint(Graphics2D g2d, Rectangle2D area) {
- // If no viewbox is defined in the svg file, a viewbox of 100x100 is
- // assumed, as defined in SVGUserAgent.getViewportSize()
- float iw = (float) ctx.getDocumentSize().getWidth();
- float ih = (float) ctx.getDocumentSize().getHeight();
- float w = (float) area.getWidth();
- float h = (float) area.getHeight();
- g2d.translate(area.getX(), area.getY());
- g2d.scale(w / iw, h / ih);
-
- root.paint(g2d);
- }
-
- public Dimension getImageSize() {
- return new Dimension(svg.getSize().getWidthMpt(), svg.getSize().getHeightMpt());
- }
-
- };
-
- ImageGraphics2D g2dImage = new ImageGraphics2D(src.getInfo(), painter);
- return g2dImage;
- }
-
- /**
- * Creates a user agent for Batik. Override to provide your own user agent.
- * @param pxToMillimeter the source resolution (in px per millimeter)
- * @return the newly created user agent
- */
- protected SimpleSVGUserAgent createBatikUserAgent(float pxToMillimeter) {
- return new SimpleSVGUserAgent(
- pxToMillimeter,
- new AffineTransform()) {
-
- /** {@inheritDoc} */
- public void displayMessage(String message) {
- //TODO Refine and pipe through to caller
- log.debug(message);
- }
-
- };
- }
-
- /** {@inheritDoc} */
- public ImageFlavor getSourceFlavor() {
- return ImageFlavor.XML_DOM;
- }
-
- /** {@inheritDoc} */
- public ImageFlavor getTargetFlavor() {
- return ImageFlavor.GRAPHICS2D;
- }
-
- }
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