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- /*
- * Copyright 1999-2005 The Apache Software Foundation.
- *
- * Licensed 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.render.java2d;
-
- import java.awt.geom.AffineTransform;
-
- import org.w3c.dom.Document;
-
- import org.apache.fop.apps.MimeConstants;
- import org.apache.fop.render.Renderer;
- import org.apache.fop.render.XMLHandler;
- import org.apache.fop.render.RendererContext;
- import org.apache.fop.render.pdf.PDFRenderer;
- import org.apache.fop.svg.SVGUserAgent;
-
- // Commons-Logging
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.batik.bridge.GVTBuilder;
- import org.apache.batik.bridge.BridgeContext;
- import org.apache.batik.dom.svg.SVGDOMImplementation;
- import org.apache.batik.gvt.GraphicsNode;
-
- /**
- * Java2D XML handler for SVG (uses Apache Batik).
- * This handler handles XML for foreign objects when rendering to Java2D.
- * The properties from the Java2D renderer are subject to change.
- */
- public class Java2DSVGHandler implements XMLHandler, Java2DRendererContextConstants {
-
- /** logging instance */
- private static Log log = LogFactory.getLog(Java2DSVGHandler.class);
-
- /**
- * Create a new Java2D XML handler for use by the Java2D renderer and its subclasses.
- */
- public Java2DSVGHandler() {
- //nop
- }
-
- /** @see org.apache.fop.render.XMLHandler */
- public void handleXML(RendererContext context,
- Document doc, String ns) throws Exception {
- Java2DInfo pdfi = getJava2DInfo(context);
-
- if (SVGDOMImplementation.SVG_NAMESPACE_URI.equals(ns)) {
- renderSVGDocument(context, doc, pdfi);
- }
- }
-
- /**
- * Get the pdf information from the render context.
- *
- * @param context the renderer context
- * @return the pdf information retrieved from the context
- */
- public static Java2DInfo getJava2DInfo(RendererContext context) {
- Java2DInfo pdfi = new Java2DInfo();
- pdfi.state = (Java2DGraphicsState)context.getProperty(JAVA2D_STATE);
- pdfi.width = ((Integer)context.getProperty(WIDTH)).intValue();
- pdfi.height = ((Integer)context.getProperty(HEIGHT)).intValue();
- pdfi.currentXPosition = ((Integer)context.getProperty(XPOS)).intValue();
- pdfi.currentYPosition = ((Integer)context.getProperty(YPOS)).intValue();
- return pdfi;
- }
-
- /**
- * Java2D information structure for drawing the XML document.
- */
- public static class Java2DInfo {
- /** see Java2D_STATE */
- public Java2DGraphicsState state;
- /** see Java2D_WIDTH */
- public int width;
- /** see Java2D_HEIGHT */
- public int height;
- /** see Java2D_XPOS */
- public int currentXPosition;
- /** see Java2D_YPOS */
- public int currentYPosition;
-
- /** @see java.lang.Object#toString() */
- public String toString() {
- return "Java2DInfo {"
- + "state = " + state + ", "
- + "width = " + width + ", "
- + "height = " + height + ", "
- + "currentXPosition = " + currentXPosition + ", "
- + "currentYPosition = " + currentYPosition + "}";
- }
- }
-
- /**
- * Render the svg document.
- * @param context the renderer context
- * @param doc the svg document
- * @param info the pdf information of the current context
- */
- protected void renderSVGDocument(RendererContext context,
- Document doc,
- Java2DInfo info) {
-
- log.debug("renderSVGDocument(" + context + ", " + doc + ", " + info + ")");
-
- int x = info.currentXPosition;
- int y = info.currentYPosition;
-
- float ptom = context.getUserAgent().getSourcePixelUnitToMillimeter();
- SVGUserAgent ua = new SVGUserAgent(ptom, new AffineTransform());
-
- GVTBuilder builder = new GVTBuilder();
- BridgeContext ctx = new BridgeContext(ua);
-
- GraphicsNode root;
- try {
- root = builder.build(ctx, doc);
- } catch (Exception e) {
- log.error("SVG graphic could not be built: " + e.getMessage(), e);
- return;
- }
-
- // 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() * 1000f;
- float ih = (float) ctx.getDocumentSize().getHeight() * 1000f;
-
- float w = (float) info.width;
- float h = (float) info.height;
-
- AffineTransform origTransform = info.state.getGraph().getTransform();
-
- // correct integer roundoff
- info.state.getGraph().translate(x / 1000f, y / 1000f);
-
- //SVGSVGElement svg = ((SVGDocument) doc).getRootElement();
- // Aspect ratio preserved by layout engine, not here
- AffineTransform at = AffineTransform.getScaleInstance(w / iw, h / ih);
- if (!at.isIdentity()) {
- info.state.getGraph().transform(at);
- }
-
- try {
- root.paint(info.state.getGraph());
- } catch (Exception e) {
- log.error("Error while painting SVG", e);
- }
-
- info.state.getGraph().setTransform(origTransform);
- }
-
- /** @see org.apache.fop.render.XMLHandler#supportsRenderer() */
- public boolean supportsRenderer(Renderer renderer) {
- return (renderer instanceof Java2DRenderer);
- }
-
-
- /** @see org.apache.fop.render.XMLHandler#getNamespace() */
- public String getNamespace() {
- return SVGDOMImplementation.SVG_NAMESPACE_URI;
- }
- }
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