| /* |
| * 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.avalon.framework.configuration.Configuration; |
| 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.TextHandler; |
| import org.apache.xmlgraphics.java2d.ps.AbstractPSDocumentGraphics2D; |
| import org.apache.xmlgraphics.ps.PSGenerator; |
| |
| import org.apache.fop.fonts.FontInfo; |
| import org.apache.fop.fonts.FontSetup; |
| import org.apache.fop.svg.AbstractFOPTranscoder; |
| |
| /** |
| * This class enables to transcode an input to a PostScript document. |
| * |
| * <p>Two transcoding hints (<tt>KEY_WIDTH</tt> and |
| * <tt>KEY_HEIGHT</tt>) 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 <tt>KEY_BACKGROUND_COLOR</tt> 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 <tt>KEY_AOI</tt> 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><tt>KEY_LANGUAGE</tt> to set the default language to use (may be |
| * used by a <switch> SVG element for example), |
| * <tt>KEY_USER_STYLESHEET_URI</tt> to fix the URI of a user |
| * stylesheet, and <tt>KEY_PIXEL_TO_MM</tt> to specify the pixel to |
| * millimeter conversion factor. |
| * |
| * @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a> |
| * @version $Id$ |
| */ |
| public abstract class AbstractPSTranscoder extends AbstractFOPTranscoder { |
| |
| private final Configuration cfg = null; |
| protected AbstractPSDocumentGraphics2D graphics = null; |
| |
| /** |
| * Constructs a new <tt>AbstractPSTranscoder</tt>. |
| */ |
| public AbstractPSTranscoder() { |
| super(); |
| } |
| |
| protected abstract AbstractPSDocumentGraphics2D createDocumentGraphics2D(); |
| |
| /** |
| * 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()) { |
| FontInfo fontInfo = new FontInfo(); |
| //TODO Do custom font configuration here somewhere/somehow |
| FontSetup.setup(fontInfo); |
| PSGenerator generator = graphics.getPSGenerator(); |
| graphics.setCustomTextHandler(new NativeTextHandler(graphics, fontInfo)); |
| } |
| |
| 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() { |
| |
| BridgeContext ctx = new BridgeContext(userAgent); |
| if (!isTextStroked()) { |
| TextHandler handler = graphics.getCustomTextHandler(); |
| if (handler instanceof NativeTextHandler) { |
| NativeTextHandler nativeTextHandler = (NativeTextHandler)handler; |
| PSTextPainter textPainter = new PSTextPainter(nativeTextHandler); |
| ctx.setTextPainter(textPainter); |
| ctx.putBridge(new PSTextElementBridge(textPainter)); |
| } |
| } |
| |
| //ctx.putBridge(new PSImageElementBridge()); |
| return ctx; |
| } |
| |
| |
| } |