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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.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;
- }
-
-
- }
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