| /* |
| * 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.Color; |
| import java.io.BufferedOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.w3c.dom.Document; |
| import org.w3c.dom.svg.SVGLength; |
| |
| import org.apache.batik.bridge.BridgeContext; |
| import org.apache.batik.bridge.UnitProcessor; |
| import org.apache.batik.transcoder.TranscoderException; |
| import org.apache.batik.transcoder.TranscoderOutput; |
| import org.apache.batik.transcoder.image.ImageTranscoder; |
| |
| import org.apache.xmlgraphics.java2d.ps.AbstractPSDocumentGraphics2D; |
| |
| import org.apache.fop.apps.FOPException; |
| import org.apache.fop.fonts.FontInfo; |
| import org.apache.fop.svg.AbstractFOPTranscoder; |
| import org.apache.fop.svg.PDFDocumentGraphics2DConfigurator; |
| import org.apache.fop.svg.font.FOPFontFamilyResolverImpl; |
| |
| /** |
| * <p>This class enables to transcode an input to a PostScript document.</p> |
| * |
| * <p>Two transcoding hints (<code>KEY_WIDTH</code> and |
| * <code>KEY_HEIGHT</code>) can be used to respectively specify the image |
| * width and the image height. If only one of these keys is specified, |
| * the transcoder preserves the aspect ratio of the original image. |
| * |
| * <p>The <code>KEY_BACKGROUND_COLOR</code> defines the background color |
| * to use for opaque image formats, or the background color that may |
| * be used for image formats that support alpha channel. |
| * |
| * <p>The <code>KEY_AOI</code> represents the area of interest to paint |
| * in device space. |
| * |
| * <p>Three additional transcoding hints that act on the SVG |
| * processor can be specified: |
| * |
| * <p><code>KEY_LANGUAGE</code> to set the default language to use (may be |
| * used by a <switch> SVG element for example), |
| * <code>KEY_USER_STYLESHEET_URI</code> to fix the URI of a user |
| * stylesheet, and <code>KEY_PIXEL_TO_MM</code> to specify the pixel to |
| * millimeter conversion factor. |
| * |
| * <p>This work was authored by Keiron Liddle (keiron@aftexsw.com).</p> |
| */ |
| public abstract class AbstractPSTranscoder extends AbstractFOPTranscoder { |
| |
| /** the root Graphics2D instance for generating PostScript */ |
| protected AbstractPSDocumentGraphics2D graphics; |
| |
| private FontInfo fontInfo; |
| |
| /** |
| * Constructs a new {@link AbstractPSTranscoder}. |
| */ |
| public AbstractPSTranscoder() { |
| super(); |
| } |
| |
| /** |
| * Creates the root Graphics2D instance for generating PostScript. |
| * @return the root Graphics2D |
| */ |
| protected abstract AbstractPSDocumentGraphics2D createDocumentGraphics2D(); |
| |
| /** {@inheritDoc} */ |
| protected boolean getAutoFontsDefault() { |
| //Currently set to false because auto-fonts requires a lot of memory in the PostScript |
| //case: All fonts (even the unsupported TTF fonts) need to be loaded and TrueType loading |
| //is currently very memory-intensive. At default JVM memory settings, this would result |
| //in OutOfMemoryErrors otherwise. |
| return false; |
| } |
| |
| /** |
| * Transcodes the specified Document as an image in the specified output. |
| * |
| * @param document the document to transcode |
| * @param uri the uri of the document or null if any |
| * @param output the ouput where to transcode |
| * @exception TranscoderException if an error occured while transcoding |
| */ |
| protected void transcode(Document document, String uri, |
| TranscoderOutput output) |
| throws TranscoderException { |
| |
| graphics = createDocumentGraphics2D(); |
| if (!isTextStroked()) { |
| try { |
| boolean useComplexScriptFeatures = false; //TODO - FIX ME |
| this.fontInfo = PDFDocumentGraphics2DConfigurator.createFontInfo( |
| getEffectiveConfiguration(), useComplexScriptFeatures); |
| graphics.setCustomTextHandler(new NativeTextHandler(graphics, fontInfo)); |
| ((FOPTranscoderUserAgent) userAgent).setFontFamilyResolver( |
| new FOPFontFamilyResolverImpl(fontInfo)); |
| } catch (FOPException fe) { |
| throw new TranscoderException(fe); |
| } |
| } |
| |
| super.transcode(document, uri, output); |
| |
| getLogger().trace("document size: " + width + " x " + height); |
| |
| // prepare the image to be painted |
| UnitProcessor.Context uctx = UnitProcessor.createContext(ctx, |
| document.getDocumentElement()); |
| float widthInPt = UnitProcessor.userSpaceToSVG(width, SVGLength.SVG_LENGTHTYPE_PT, |
| UnitProcessor.HORIZONTAL_LENGTH, uctx); |
| int w = (int)(widthInPt + 0.5); |
| float heightInPt = UnitProcessor.userSpaceToSVG(height, SVGLength.SVG_LENGTHTYPE_PT, |
| UnitProcessor.HORIZONTAL_LENGTH, uctx); |
| int h = (int)(heightInPt + 0.5); |
| getLogger().trace("document size: " + w + "pt x " + h + "pt"); |
| |
| try { |
| OutputStream out = output.getOutputStream(); |
| if (!(out instanceof BufferedOutputStream)) { |
| out = new BufferedOutputStream(out); |
| } |
| graphics.setupDocument(out, w, h); |
| graphics.setViewportDimension(width, height); |
| |
| if (hints.containsKey(ImageTranscoder.KEY_BACKGROUND_COLOR)) { |
| graphics.setBackgroundColor( |
| (Color)hints.get(ImageTranscoder.KEY_BACKGROUND_COLOR)); |
| } |
| graphics.setGraphicContext( |
| new org.apache.xmlgraphics.java2d.GraphicContext()); |
| graphics.setTransform(curTxf); |
| |
| this.root.paint(graphics); |
| |
| graphics.finish(); |
| } catch (IOException ex) { |
| throw new TranscoderException(ex); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| protected BridgeContext createBridgeContext() { |
| //For compatibility with Batik 1.6 |
| return createBridgeContext("1.x"); |
| } |
| |
| /** {@inheritDoc} */ |
| public BridgeContext createBridgeContext(String version) { |
| BridgeContext ctx = new PSBridgeContext(userAgent, (isTextStroked() ? null : fontInfo), |
| getImageManager(), getImageSessionContext()); |
| return ctx; |
| } |
| |
| } |