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/*
* $Id$
* ============================================================================
* The Apache Software License, Version 1.1
* ============================================================================
*
* Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by the Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "FOP" and "Apache Software Foundation" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache", nor may
* "Apache" appear in their name, without prior written permission of the
* Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
* DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ============================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Apache Software Foundation and was originally created by
* James Tauber <jtauber@jtauber.com>. For more information on the Apache
* Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.render.ps;
import java.awt.Color;
import java.io.IOException;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.container.ContainerUtil;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.ImageTranscoder;
import org.apache.fop.svg.AbstractFOPTranscoder;
import org.w3c.dom.Document;
/**
* 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>
* @author <a href="mailto:jeremias@apache.org">Jeremias Maerki</a>
* @version $Id$
*/
public abstract class AbstractPSTranscoder extends AbstractFOPTranscoder {
private Configuration cfg = null;
protected AbstractPSDocumentGraphics2D graphics = null;
/**
* Constructs a new <tt>AbstractPSTranscoder</tt>.
*/
public AbstractPSTranscoder() {
super();
}
protected abstract AbstractPSDocumentGraphics2D createDocumentGraphics2D();
protected BridgeContext createBridgeContext() {
/*boolean stroke = true;
if (hints.containsKey(KEY_STROKE_TEXT)) {
stroke = ((Boolean)hints.get(KEY_STROKE_TEXT)).booleanValue();
}*/
BridgeContext ctx = new BridgeContext(userAgent);
PSTextPainter textPainter = new PSTextPainter(graphics.getDocument());
ctx.setTextPainter(textPainter);
ctx.putBridge(new PSTextElementBridge(textPainter));
//ctx.putBridge(new PSImageElementBridge());
return ctx;
}
/**
* 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();
ContainerUtil.enableLogging(graphics, getLogger());
try {
if (this.cfg != null) {
ContainerUtil.configure(graphics, this.cfg);
}
ContainerUtil.initialize(graphics);
} catch (Exception e) {
throw new TranscoderException(
"Error while setting up PDFDocumentGraphics2D", e);
}
super.transcode(document, uri, output);
// prepare the image to be painted
int w = (int)(width + 0.5);
int h = (int)(height + 0.5);
try {
graphics.setupDocument(output.getOutputStream(), w, h);
graphics.setSVGDimension(width, height);
if (hints.containsKey(ImageTranscoder.KEY_BACKGROUND_COLOR)) {
graphics.setBackgroundColor
((Color)hints.get(ImageTranscoder.KEY_BACKGROUND_COLOR));
}
graphics.setGraphicContext
(new org.apache.batik.ext.awt.g2d.GraphicContext());
graphics.setTransform(curTxf);
this.root.paint(graphics);
graphics.finish();
} catch (IOException ex) {
throw new TranscoderException(ex);
}
}
}
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