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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.pdf;
-
- import java.io.OutputStream;
- import java.awt.Color;
- import java.awt.geom.AffineTransform;
-
- import org.w3c.dom.Document;
- import org.w3c.dom.svg.SVGDocument;
- import org.w3c.dom.svg.SVGSVGElement;
-
- import org.apache.fop.render.Renderer;
- import org.apache.fop.render.XMLHandler;
- import org.apache.fop.render.RendererContext;
- import org.apache.fop.pdf.PDFDocument;
- import org.apache.fop.pdf.PDFNumber;
- import org.apache.fop.pdf.PDFPage;
- import org.apache.fop.pdf.PDFState;
- import org.apache.fop.pdf.PDFStream;
- import org.apache.fop.pdf.PDFResourceContext;
- import org.apache.fop.svg.PDFBridgeContext;
- import org.apache.fop.svg.PDFGraphics2D;
- import org.apache.fop.svg.SVGUserAgent;
- import org.apache.fop.fonts.FontInfo;
-
- // Commons-Logging
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.avalon.framework.configuration.Configuration;
-
- import org.apache.batik.bridge.GVTBuilder;
- import org.apache.batik.bridge.BridgeContext;
- import org.apache.batik.bridge.ViewBox;
- import org.apache.batik.dom.svg.SVGDOMImplementation;
- import org.apache.batik.gvt.GraphicsNode;
-
- /**
- * PDF XML handler for SVG (uses Apache Batik).
- * This handler handles XML for foreign objects when rendering to PDF.
- * It renders SVG to the PDF document using the PDFGraphics2D.
- * The properties from the PDF renderer are subject to change.
- */
- public class PDFSVGHandler implements XMLHandler, PDFRendererContextConstants {
-
- /** logging instance */
- private static Log log = LogFactory.getLog(PDFSVGHandler.class);
-
-
- /**
- * Create a new PDF XML handler for use by the PDF renderer.
- */
- public PDFSVGHandler() {
- }
-
- /** @see org.apache.fop.render.XMLHandler */
- public void handleXML(RendererContext context,
- Document doc, String ns) throws Exception {
- PDFInfo pdfi = getPDFInfo(context);
-
- String svg = "http://www.w3.org/2000/svg";
- if (svg.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 PDFInfo getPDFInfo(RendererContext context) {
- PDFInfo pdfi = new PDFInfo();
- pdfi.pdfDoc = (PDFDocument)context.getProperty(PDF_DOCUMENT);
- pdfi.outputStream = (OutputStream)context.getProperty(OUTPUT_STREAM);
- pdfi.pdfState = (PDFState)context.getProperty(PDF_STATE);
- pdfi.pdfPage = (PDFPage)context.getProperty(PDF_PAGE);
- pdfi.pdfContext = (PDFResourceContext)context.getProperty(PDF_CONTEXT);
- pdfi.currentStream = (PDFStream)context.getProperty(PDF_STREAM);
- pdfi.width = ((Integer)context.getProperty(WIDTH)).intValue();
- pdfi.height = ((Integer)context.getProperty(HEIGHT)).intValue();
- pdfi.fi = (FontInfo)context.getProperty(PDF_FONT_INFO);
- pdfi.currentFontName = (String)context.getProperty(PDF_FONT_NAME);
- pdfi.currentFontSize = ((Integer)context.getProperty(PDF_FONT_SIZE)).intValue();
- pdfi.currentXPosition = ((Integer)context.getProperty(XPOS)).intValue();
- pdfi.currentYPosition = ((Integer)context.getProperty(YPOS)).intValue();
- pdfi.cfg = (Configuration)context.getProperty(HANDLER_CONFIGURATION);
- return pdfi;
- }
-
- /**
- * PDF information structure for drawing the XML document.
- */
- public static class PDFInfo {
- /** see PDF_DOCUMENT */
- public PDFDocument pdfDoc;
- /** see OUTPUT_STREAM */
- public OutputStream outputStream;
- /** see PDF_STATE */
- public PDFState pdfState;
- /** see PDF_PAGE */
- public PDFPage pdfPage;
- /** see PDF_CONTEXT */
- public PDFResourceContext pdfContext;
- /** see PDF_STREAM */
- public PDFStream currentStream;
- /** see PDF_WIDTH */
- public int width;
- /** see PDF_HEIGHT */
- public int height;
- /** see PDF_FONT_INFO */
- public FontInfo fi;
- /** see PDF_FONT_NAME */
- public String currentFontName;
- /** see PDF_FONT_SIZE */
- public int currentFontSize;
- /** see PDF_XPOS */
- public int currentXPosition;
- /** see PDF_YPOS */
- public int currentYPosition;
- /** see PDF_HANDLER_CONFIGURATION */
- public Configuration cfg;
- }
-
- /**
- * Render the svg document.
- * @param context the renderer context
- * @param doc the svg document
- * @param pdfInfo the pdf information of the current context
- */
- protected void renderSVGDocument(RendererContext context,
- Document doc, PDFInfo pdfInfo) {
- int xOffset = pdfInfo.currentXPosition;
- int yOffset = pdfInfo.currentYPosition;
-
- log.debug("Generating SVG at "
- + context.getUserAgent().getTargetResolution()
- + "dpi.");
- final float deviceResolution = context.getUserAgent().getTargetResolution();
-
- final float uaResolution = context.getUserAgent().getSourceResolution();
- SVGUserAgent ua = new SVGUserAgent(25.4f / uaResolution, new AffineTransform());
-
- GVTBuilder builder = new GVTBuilder();
-
- //TODO This AffineTransform here has to be fixed!!!
- AffineTransform linkTransform = pdfInfo.pdfState.getTransform();
- linkTransform.translate(xOffset / 1000f, yOffset / 1000f);
-
- //Controls whether text painted by Batik is generated using text or path operations
- boolean strokeText = false;
- Configuration cfg = pdfInfo.cfg;
- if (cfg != null) {
- strokeText = cfg.getChild("stroke-text", true).getValueAsBoolean(strokeText);
- }
-
- BridgeContext ctx = new PDFBridgeContext(ua,
- (strokeText ? null : pdfInfo.fi),
- linkTransform);
-
- GraphicsNode root;
- try {
- root = builder.build(ctx, doc);
- } catch (Exception e) {
- log.error("svg graphic could not be built: "
- + e.getMessage(), e);
- return;
- }
- // get the 'width' and 'height' attributes of the SVG document
- float w = (float)ctx.getDocumentSize().getWidth() * 1000f;
- float h = (float)ctx.getDocumentSize().getHeight() * 1000f;
-
- float sx = pdfInfo.width / (float)w;
- float sy = pdfInfo.height / (float)h;
-
- ctx = null;
- builder = null;
-
- /*
- * Clip to the svg area.
- * Note: To have the svg overlay (under) a text area then use
- * an fo:block-container
- */
- PDFRenderer renderer = (PDFRenderer)context.getRenderer();
- renderer.saveGraphicsState();
- renderer.setColor(Color.black, false, null);
- renderer.setColor(Color.black, true, null);
- // transform so that the coordinates (0,0) is from the top left
- // and positive is down and to the right. (0,0) is where the
- // viewBox puts it.
- pdfInfo.currentStream.add(sx + " 0 0 " + sy + " " + xOffset / 1000f + " "
- + yOffset / 1000f + " cm\n");
-
- SVGSVGElement svg = ((SVGDocument)doc).getRootElement();
- //AffineTransform at = ViewBox.getPreserveAspectRatioTransform(
- // svg, w / 1000f, h / 1000f);
- AffineTransform at = ViewBox.getPreserveAspectRatioTransform(svg,
- pdfInfo.width / 1000f, pdfInfo.height / 1000f);
- /*
- if (!at.isIdentity()) {
- double[] vals = new double[6];
- at.getMatrix(vals);
- pdfInfo.currentStream.add(CTMHelper.toPDFString(at, false) + " cm\n");
- }*/
-
- if (pdfInfo.pdfContext == null) {
- pdfInfo.pdfContext = pdfInfo.pdfPage;
- }
- PDFGraphics2D graphics = new PDFGraphics2D(true, pdfInfo.fi,
- pdfInfo.pdfDoc,
- pdfInfo.pdfContext, pdfInfo.pdfPage.referencePDF(),
- pdfInfo.currentFontName, pdfInfo.currentFontSize);
- graphics.setGraphicContext(new org.apache.batik.ext.awt.g2d.GraphicContext());
- pdfInfo.pdfState.push();
- AffineTransform transform = new AffineTransform();
- // scale to viewbox
- transform.translate(xOffset / 1000f, yOffset / 1000f);
-
- if (deviceResolution != uaResolution) {
- //Scale for higher resolution on-the-fly images from Batik
- double s = uaResolution / deviceResolution;
- at.scale(s, s);
- pdfInfo.currentStream.add("" + PDFNumber.doubleOut(s) + " 0 0 "
- + PDFNumber.doubleOut(s) + " 0 0 cm\n");
- graphics.scale(1 / s, 1 / s);
- }
-
- pdfInfo.pdfState.setTransform(transform);
- graphics.setPDFState(pdfInfo.pdfState);
- graphics.setOutputStream(pdfInfo.outputStream);
- try {
- root.paint(graphics);
- pdfInfo.currentStream.add(graphics.getString());
- } catch (Exception e) {
- log.error("svg graphic could not be rendered: "
- + e.getMessage(), e);
- }
-
- renderer.restoreGraphicsState();
- pdfInfo.pdfState.pop();
- }
-
- /** @see org.apache.fop.render.XMLHandler#supportsRenderer(org.apache.fop.render.Renderer) */
- public boolean supportsRenderer(Renderer renderer) {
- return (renderer instanceof PDFRenderer);
- }
- /** @see org.apache.fop.render.XMLHandler#getNamespace() */
- public String getNamespace() {
- return SVGDOMImplementation.SVG_NAMESPACE_URI;
- }
-
- }
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