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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.ps;
-
- import java.awt.geom.Dimension2D;
- import java.awt.image.RenderedImage;
- import java.awt.geom.Rectangle2D;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.util.Iterator;
- import java.util.Map;
- import java.util.Set;
-
- import org.apache.xmlgraphics.image.loader.ImageException;
- import org.apache.xmlgraphics.image.loader.ImageFlavor;
- import org.apache.xmlgraphics.image.loader.ImageInfo;
- import org.apache.xmlgraphics.image.loader.ImageManager;
- import org.apache.xmlgraphics.image.loader.ImageSessionContext;
- import org.apache.xmlgraphics.image.loader.impl.ImageGraphics2D;
- import org.apache.xmlgraphics.image.loader.impl.ImageRawCCITTFax;
- import org.apache.xmlgraphics.image.loader.impl.ImageRawEPS;
- import org.apache.xmlgraphics.image.loader.impl.ImageRawJPEG;
- import org.apache.xmlgraphics.image.loader.impl.ImageRawStream;
- import org.apache.xmlgraphics.image.loader.impl.ImageRendered;
- import org.apache.xmlgraphics.image.loader.impl.ImageXMLDOM;
- import org.apache.xmlgraphics.image.loader.util.ImageUtil;
- import org.apache.xmlgraphics.ps.DSCConstants;
- import org.apache.xmlgraphics.ps.FormGenerator;
- import org.apache.xmlgraphics.ps.ImageEncoder;
- import org.apache.xmlgraphics.ps.ImageFormGenerator;
- import org.apache.xmlgraphics.ps.PSGenerator;
- import org.apache.xmlgraphics.ps.PSProcSets;
- import org.apache.xmlgraphics.ps.dsc.DSCException;
- import org.apache.xmlgraphics.ps.dsc.DSCFilter;
- import org.apache.xmlgraphics.ps.dsc.DSCParser;
- import org.apache.xmlgraphics.ps.dsc.DSCParserConstants;
- import org.apache.xmlgraphics.ps.dsc.DefaultNestedDocumentHandler;
- import org.apache.xmlgraphics.ps.dsc.ResourceTracker;
- import org.apache.xmlgraphics.ps.dsc.events.DSCComment;
- import org.apache.xmlgraphics.ps.dsc.events.DSCCommentBoundingBox;
- import org.apache.xmlgraphics.ps.dsc.events.DSCCommentDocumentNeededResources;
- import org.apache.xmlgraphics.ps.dsc.events.DSCCommentDocumentSuppliedResources;
- import org.apache.xmlgraphics.ps.dsc.events.DSCCommentHiResBoundingBox;
- import org.apache.xmlgraphics.ps.dsc.events.DSCCommentLanguageLevel;
- import org.apache.xmlgraphics.ps.dsc.events.DSCCommentPage;
- import org.apache.xmlgraphics.ps.dsc.events.DSCCommentPages;
- import org.apache.xmlgraphics.ps.dsc.events.DSCEvent;
- import org.apache.xmlgraphics.ps.dsc.events.DSCHeaderComment;
- import org.apache.xmlgraphics.ps.dsc.events.PostScriptComment;
- import org.apache.xmlgraphics.ps.dsc.tools.DSCTools;
-
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.fonts.FontInfo;
-
- /**
- * This class is used when two-pass production is used to generate the PostScript file (setting
- * "optimize-resources"). It uses the DSC parser from XML Graphics Commons to go over the
- * temporary file generated by the PSRenderer and adds all used fonts and images as resources
- * to the PostScript file.
- */
- public class ResourceHandler implements DSCParserConstants, PSSupportedFlavors {
-
- /**
- * Rewrites the temporary PostScript file generated by PSRenderer adding all needed resources
- * (fonts and images).
- * @param userAgent the FO user agent
- * @param in the InputStream for the temporary PostScript file
- * @param out the OutputStream to write the finished file to
- * @param fontInfo the font information
- * @param resTracker the resource tracker to use
- * @param formResources Contains all forms used by this document (maintained by PSRenderer)
- * @param pageCount the number of pages (given here because PSRenderer writes an "(atend)")
- * @param documentBoundingBox the document's bounding box
- * (given here because PSRenderer writes an "(atend)")
- * @throws DSCException If there's an error in the DSC structure of the PS file
- * @throws IOException In case of an I/O error
- */
- public static void process(FOUserAgent userAgent, InputStream in, OutputStream out,
- FontInfo fontInfo, ResourceTracker resTracker, Map formResources,
- int pageCount, Rectangle2D documentBoundingBox)
- throws DSCException, IOException {
- DSCParser parser = new DSCParser(in);
- PSGenerator gen = new PSGenerator(out);
- parser.setNestedDocumentHandler(new DefaultNestedDocumentHandler(gen));
-
- //Skip DSC header
- DSCHeaderComment header = DSCTools.checkAndSkipDSC30Header(parser);
- header.generate(gen);
-
- parser.setFilter(new DSCFilter() {
- private final Set filtered = new java.util.HashSet();
- {
- //We rewrite those as part of the processing
- filtered.add(DSCConstants.PAGES);
- filtered.add(DSCConstants.BBOX);
- filtered.add(DSCConstants.HIRES_BBOX);
- filtered.add(DSCConstants.DOCUMENT_NEEDED_RESOURCES);
- filtered.add(DSCConstants.DOCUMENT_SUPPLIED_RESOURCES);
- }
- public boolean accept(DSCEvent event) {
- if (event.isDSCComment()) {
- //Filter %%Pages which we add manually from a parameter
- return !(filtered.contains(event.asDSCComment().getName()));
- } else {
- return true;
- }
- }
- });
-
- //Get PostScript language level (may be missing)
- while (true) {
- DSCEvent event = parser.nextEvent();
- if (event == null) {
- reportInvalidDSC();
- }
- if (DSCTools.headerCommentsEndHere(event)) {
- //Set number of pages
- DSCCommentPages pages = new DSCCommentPages(pageCount);
- pages.generate(gen);
- new DSCCommentBoundingBox(documentBoundingBox).generate(gen);
- new DSCCommentHiResBoundingBox(documentBoundingBox).generate(gen);
-
- PSFontUtils.determineSuppliedFonts(resTracker, fontInfo, fontInfo.getUsedFonts());
- registerSuppliedForms(resTracker, formResources);
-
- //Supplied Resources
- DSCCommentDocumentSuppliedResources supplied
- = new DSCCommentDocumentSuppliedResources(
- resTracker.getDocumentSuppliedResources());
- supplied.generate(gen);
-
- //Needed Resources
- DSCCommentDocumentNeededResources needed
- = new DSCCommentDocumentNeededResources(
- resTracker.getDocumentNeededResources());
- needed.generate(gen);
-
- //Write original comment that ends the header comments
- event.generate(gen);
- break;
- }
- if (event.isDSCComment()) {
- DSCComment comment = event.asDSCComment();
- if (DSCConstants.LANGUAGE_LEVEL.equals(comment.getName())) {
- DSCCommentLanguageLevel level = (DSCCommentLanguageLevel)comment;
- gen.setPSLevel(level.getLanguageLevel());
- }
- }
- event.generate(gen);
- }
-
- //Skip to the FOPFontSetup
- PostScriptComment fontSetupPlaceholder = parser.nextPSComment("FOPFontSetup", gen);
- if (fontSetupPlaceholder == null) {
- throw new DSCException("Didn't find %FOPFontSetup comment in stream");
- }
- PSFontUtils.writeFontDict(gen, fontInfo, fontInfo.getUsedFonts());
- generateForms(resTracker, userAgent, formResources, gen);
-
- //Skip the prolog and to the first page
- DSCComment pageOrTrailer = parser.nextDSCComment(DSCConstants.PAGE, gen);
- if (pageOrTrailer == null) {
- throw new DSCException("Page expected, but none found");
- }
-
- //Process individual pages (and skip as necessary)
- while (true) {
- DSCCommentPage page = (DSCCommentPage)pageOrTrailer;
- page.generate(gen);
- pageOrTrailer = DSCTools.nextPageOrTrailer(parser, gen);
- if (pageOrTrailer == null) {
- reportInvalidDSC();
- } else if (!DSCConstants.PAGE.equals(pageOrTrailer.getName())) {
- pageOrTrailer.generate(gen);
- break;
- }
- }
-
- //Write the rest
- while (parser.hasNext()) {
- DSCEvent event = parser.nextEvent();
- event.generate(gen);
- }
- }
-
- private static void reportInvalidDSC() throws DSCException {
- throw new DSCException("File is not DSC-compliant: Unexpected end of file");
- }
-
- private static void registerSuppliedForms(ResourceTracker resTracker, Map formResources)
- throws IOException {
- if (formResources == null) {
- return;
- }
- Iterator iter = formResources.values().iterator();
- while (iter.hasNext()) {
- PSImageFormResource form = (PSImageFormResource)iter.next();
- resTracker.registerSuppliedResource(form);
- }
- }
-
- private static void generateForms(ResourceTracker resTracker, FOUserAgent userAgent,
- Map formResources, PSGenerator gen) throws IOException {
- if (formResources == null) {
- return;
- }
- Iterator iter = formResources.values().iterator();
- while (iter.hasNext()) {
- PSImageFormResource form = (PSImageFormResource)iter.next();
- final String uri = form.getImageURI();
-
- ImageManager manager = userAgent.getFactory().getImageManager();
- ImageInfo info = null;
- try {
- ImageSessionContext sessionContext = userAgent.getImageSessionContext();
- info = manager.getImageInfo(uri, sessionContext);
-
- ImageFlavor[] flavors;
- if (gen.getPSLevel() >= 3) {
- flavors = LEVEL_3_FLAVORS_FORM;
- } else {
- flavors = LEVEL_2_FLAVORS_FORM;
- }
- Map hints = ImageUtil.getDefaultHints(sessionContext);
- org.apache.xmlgraphics.image.loader.Image img = manager.getImage(
- info, flavors, hints, sessionContext);
-
- String imageDescription = info.getMimeType() + " " + info.getOriginalURI();
- final Dimension2D dimensionsPt = info.getSize().getDimensionPt();
- final Dimension2D dimensionsMpt = info.getSize().getDimensionMpt();
-
- if (img instanceof ImageGraphics2D) {
- final ImageGraphics2D imageG2D = (ImageGraphics2D)img;
- FormGenerator formGen = new FormGenerator(
- form.getName(), imageDescription, dimensionsPt) {
-
- protected void generatePaintProc(PSGenerator gen)
- throws IOException {
- gen.getResourceTracker().notifyResourceUsageOnPage(
- PSProcSets.EPS_PROCSET);
- gen.writeln("BeginEPSF");
- PSGraphics2DAdapter adapter = new PSGraphics2DAdapter(gen, false);
- adapter.paintImage(imageG2D.getGraphics2DImagePainter(),
- null,
- 0, 0,
- (int)Math.round(dimensionsMpt.getWidth()),
- (int)Math.round(dimensionsMpt.getHeight()));
- gen.writeln("EndEPSF");
- }
-
- };
- formGen.generate(gen);
- } else if (img instanceof ImageRendered) {
- ImageRendered imgRend = (ImageRendered)img;
- RenderedImage ri = imgRend.getRenderedImage();
- FormGenerator formGen = new ImageFormGenerator(
- form.getName(), imageDescription,
- info.getSize().getDimensionPt(),
- ri, false);
- formGen.generate(gen);
- } else if (img instanceof ImageXMLDOM) {
- throw new UnsupportedOperationException(
- "Embedding an ImageXMLDOM as a form isn't supported, yet");
- } else if (img instanceof ImageRawStream) {
- final ImageRawStream raw = (ImageRawStream)img;
- if (raw instanceof ImageRawEPS) {
- final ImageRawEPS eps = (ImageRawEPS)raw;
- throw new UnsupportedOperationException(
- "Embedding EPS as forms isn't supported, yet");
- /*
- InputStream in = eps.createInputStream();
- try {
- FormGenerator formGen = new EPSFormGenerator(form.getName(),
- imageDescription, dimensions, in);
- formGen.generate(gen);
- } finally {
- IOUtils.closeQuietly(in);
- }*/
- } else if (raw instanceof ImageRawCCITTFax) {
- ImageRawCCITTFax jpeg = (ImageRawCCITTFax)raw;
- ImageEncoder encoder = new ImageEncoderCCITTFax(jpeg);
- FormGenerator formGen = new ImageFormGenerator(
- form.getName(), imageDescription,
- info.getSize().getDimensionPt(),
- info.getSize().getDimensionPx(),
- encoder,
- jpeg.getColorSpace(), 1, false);
- formGen.generate(gen);
- } else if (raw instanceof ImageRawJPEG) {
- ImageRawJPEG jpeg = (ImageRawJPEG)raw;
- ImageEncoder encoder = new ImageEncoderJPEG(jpeg);
- FormGenerator formGen = new ImageFormGenerator(
- form.getName(), imageDescription,
- info.getSize().getDimensionPt(),
- info.getSize().getDimensionPx(),
- encoder,
- jpeg.getColorSpace(), jpeg.isInverted());
- formGen.generate(gen);
- } else {
- throw new UnsupportedOperationException("Unsupported raw image: " + info);
- }
- } else {
- throw new UnsupportedOperationException("Unsupported image type: " + img);
- }
- } catch (ImageException ie) {
- throw new IOException("Error while generating form for image: " + ie.getMessage());
- }
- }
- }
-
- private static FormGenerator createMissingForm(String formName, final Dimension2D dimensions) {
- FormGenerator formGen = new FormGenerator(formName, null, dimensions) {
-
- protected void generatePaintProc(PSGenerator gen) throws IOException {
- gen.writeln("0 setgray");
- gen.writeln("0 setlinewidth");
- String w = gen.formatDouble(dimensions.getWidth());
- String h = gen.formatDouble(dimensions.getHeight());
- gen.writeln(w + " " + h + " scale");
- gen.writeln("0 0 1 1 rectstroke");
- gen.writeln("newpath");
- gen.writeln("0 0 moveto");
- gen.writeln("1 1 lineto");
- gen.writeln("stroke");
- gen.writeln("newpath");
- gen.writeln("0 1 moveto");
- gen.writeln("1 0 lineto");
- gen.writeln("stroke");
- }
-
- };
- return formGen;
- }
-
- }
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