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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.render.pdf;
-
- import java.awt.Color;
- import java.awt.Rectangle;
- import java.awt.geom.AffineTransform;
- import java.io.IOException;
-
- import org.apache.batik.bridge.BridgeContext;
- import org.apache.batik.bridge.GVTBuilder;
- import org.apache.batik.dom.svg.SVGDOMImplementation;
- import org.apache.batik.gvt.GraphicsNode;
- import org.apache.batik.util.SVGConstants;
- 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.ImageFlavor;
- import org.apache.xmlgraphics.image.loader.impl.ImageXMLDOM;
-
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.image.loader.batik.BatikImageFlavors;
- import org.apache.fop.image.loader.batik.BatikUtil;
- import org.apache.fop.render.ImageHandler;
- import org.apache.fop.render.RenderingContext;
- import org.apache.fop.render.pdf.PDFLogicalStructureHandler.MarkedContentInfo;
- import org.apache.fop.svg.PDFAElementBridge;
- import org.apache.fop.svg.PDFBridgeContext;
- import org.apache.fop.svg.PDFGraphics2D;
- import org.apache.fop.svg.SVGEventProducer;
- import org.apache.fop.svg.SVGUserAgent;
- import org.w3c.dom.Document;
-
- /**
- * Image Handler implementation which handles SVG images.
- */
- public class PDFImageHandlerSVG implements ImageHandler {
-
- /** logging instance */
- private static Log log = LogFactory.getLog(PDFImageHandlerSVG.class);
-
- /** {@inheritDoc} */
- public void handleImage(RenderingContext context, Image image, Rectangle pos)
- throws IOException {
- PDFRenderingContext pdfContext = (PDFRenderingContext)context;
- PDFContentGenerator generator = pdfContext.getGenerator();
- ImageXMLDOM imageSVG = (ImageXMLDOM)image;
-
- FOUserAgent userAgent = context.getUserAgent();
- final float deviceResolution = userAgent.getTargetResolution();
- if (log.isDebugEnabled()) {
- log.debug("Generating SVG at " + deviceResolution + "dpi.");
- }
-
- final float uaResolution = userAgent.getSourceResolution();
- SVGUserAgent ua = new SVGUserAgent(userAgent, new AffineTransform());
-
- GVTBuilder builder = new GVTBuilder();
-
- //Controls whether text painted by Batik is generated using text or path operations
- boolean strokeText = false;
- //TODO connect with configuration elsewhere.
-
- BridgeContext ctx = new PDFBridgeContext(ua,
- (strokeText ? null : pdfContext.getFontInfo()),
- userAgent.getFactory().getImageManager(),
- userAgent.getImageSessionContext(),
- new AffineTransform());
-
- //Cloning SVG DOM as Batik attaches non-thread-safe facilities (like the CSS engine)
- //to it.
- Document clonedDoc = BatikUtil.cloneSVGDocument(imageSVG.getDocument());
-
- GraphicsNode root;
- try {
- root = builder.build(ctx, clonedDoc);
- builder = null;
- } catch (Exception e) {
- SVGEventProducer eventProducer = SVGEventProducer.Provider.get(
- context.getUserAgent().getEventBroadcaster());
- eventProducer.svgNotBuilt(this, e, image.getInfo().getOriginalURI());
- return;
- }
- // get the 'width' and 'height' attributes of the SVG document
- float w = image.getSize().getWidthMpt();
- float h = image.getSize().getHeightMpt();
-
- float sx = pos.width / w;
- float sy = pos.height / h;
-
- //Scaling and translation for the bounding box of the image
- AffineTransform scaling = new AffineTransform(
- sx, 0, 0, sy, pos.x / 1000f, pos.y / 1000f);
-
- //Scale for higher resolution on-the-fly images from Batik
- double s = uaResolution / deviceResolution;
- AffineTransform resolutionScaling = new AffineTransform();
- resolutionScaling.scale(s, s);
- resolutionScaling.scale(1.0 / sx, 1.0 / sy);
-
- //Transformation matrix that establishes the local coordinate system for the SVG graphic
- //in relation to the current coordinate system
- AffineTransform imageTransform = new AffineTransform();
- imageTransform.concatenate(scaling);
- imageTransform.concatenate(resolutionScaling);
-
- /*
- * Clip to the svg area.
- * Note: To have the svg overlay (under) a text area then use
- * an fo:block-container
- */
- generator.comment("SVG setup");
- generator.saveGraphicsState();
- if (context.getUserAgent().isAccessibilityEnabled()) {
- MarkedContentInfo mci = pdfContext.getMarkedContentInfo();
- generator.beginMarkedContentSequence(mci.tag, mci.mcid);
- }
- generator.setColor(Color.black, false);
- generator.setColor(Color.black, true);
-
- if (!scaling.isIdentity()) {
- generator.comment("viewbox");
- generator.add(CTMHelper.toPDFString(scaling, false) + " cm\n");
- }
-
- //SVGSVGElement svg = ((SVGDocument)doc).getRootElement();
-
- PDFGraphics2D graphics = new PDFGraphics2D(true, pdfContext.getFontInfo(),
- generator.getDocument(),
- generator.getResourceContext(), pdfContext.getPage().referencePDF(),
- "", 0);
- graphics.setGraphicContext(new org.apache.xmlgraphics.java2d.GraphicContext());
-
- if (!resolutionScaling.isIdentity()) {
- generator.comment("resolution scaling for " + uaResolution
- + " -> " + deviceResolution + "\n");
- generator.add(
- CTMHelper.toPDFString(resolutionScaling, false) + " cm\n");
- graphics.scale(
- 1.0 / resolutionScaling.getScaleX(),
- 1.0 / resolutionScaling.getScaleY());
- }
-
- generator.comment("SVG start");
-
- //Save state and update coordinate system for the SVG image
- generator.getState().save();
- generator.getState().concatenate(imageTransform);
-
- //Now that we have the complete transformation matrix for the image, we can update the
- //transformation matrix for the AElementBridge.
- PDFAElementBridge aBridge = (PDFAElementBridge)ctx.getBridge(
- SVGDOMImplementation.SVG_NAMESPACE_URI, SVGConstants.SVG_A_TAG);
- aBridge.getCurrentTransform().setTransform(generator.getState().getTransform());
-
- graphics.setPaintingState(generator.getState());
- graphics.setOutputStream(generator.getOutputStream());
- try {
- root.paint(graphics);
- generator.add(graphics.getString());
- } catch (Exception e) {
- SVGEventProducer eventProducer = SVGEventProducer.Provider.get(
- context.getUserAgent().getEventBroadcaster());
- eventProducer.svgRenderingError(this, e, image.getInfo().getOriginalURI());
- }
- generator.getState().restore();
- if (context.getUserAgent().isAccessibilityEnabled()) {
- generator.restoreGraphicsStateAccess();
- } else {
- generator.restoreGraphicsState();
- }
- generator.comment("SVG end");
- }
-
- /** {@inheritDoc} */
- public int getPriority() {
- return 400;
- }
-
- /** {@inheritDoc} */
- public Class getSupportedImageClass() {
- return ImageXMLDOM.class;
- }
-
- /** {@inheritDoc} */
- public ImageFlavor[] getSupportedImageFlavors() {
- return new ImageFlavor[] {
- BatikImageFlavors.SVG_DOM
- };
- }
-
- /** {@inheritDoc} */
- public boolean isCompatible(RenderingContext targetContext, Image image) {
- return (image == null
- || (image instanceof ImageXMLDOM
- && image.getFlavor().isCompatible(BatikImageFlavors.SVG_DOM)))
- && targetContext instanceof PDFRenderingContext;
- }
-
- }
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