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/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed 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.svg;
import java.awt.Color;
import java.awt.geom.AffineTransform;
import java.io.IOException;
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.container.ContainerUtil;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.bridge.UnitProcessor;
import org.apache.batik.bridge.UserAgent;
import org.apache.batik.ext.awt.RenderingHintsKeyExt;
import org.apache.batik.gvt.TextPainter;
import org.apache.batik.gvt.renderer.StrokingTextPainter;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.ImageTranscoder;
import org.w3c.dom.Document;
import org.w3c.dom.svg.SVGLength;
/**
* This class enables to transcode an input to a pdf 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 class PDFTranscoder extends AbstractFOPTranscoder
implements Configurable {
private Configuration cfg = null;
protected PDFDocumentGraphics2D graphics = null;
/**
* Constructs a new <tt>ImageTranscoder</tt>.
*/
public PDFTranscoder() {
super();
this.handler = new FOPErrorHandler();
}
/**
* @see org.apache.fop.svg.AbstractFOPTranscoder#createUserAgent()
*/
protected UserAgent createUserAgent() {
return new AbstractFOPTranscoder.FOPTranscoderUserAgent() {
// The PDF stuff wants everything at 72dpi
public float getPixelUnitToMillimeter() {
return super.getPixelUnitToMillimeter();
//return 25.4f / 72; //72dpi = 0.352778f;
}
};
}
/**
* @see org.apache.avalon.framework.configuration.Configurable#configure(Configuration)
*/
public void configure(Configuration cfg) throws ConfigurationException {
this.cfg = cfg;
}
/**
* 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 = new PDFDocumentGraphics2D();
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);
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");
// 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);
graphics.setRenderingHint
(RenderingHintsKeyExt.KEY_TRANSCODING,
RenderingHintsKeyExt.VALUE_TRANSCODING_VECTOR);
this.root.paint(graphics);
graphics.finish();
} catch (IOException ex) {
throw new TranscoderException(ex);
}
}
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);
TextPainter textPainter = null;
textPainter = new StrokingTextPainter();
ctx.setTextPainter(textPainter);
/*if (!stroke) {
textPainter = new PDFTextPainter(graphics.getFontInfo());
ctx.setTextPainter(textPainter);
}*/
PDFTextElementBridge pdfTextElementBridge;
pdfTextElementBridge = new PDFTextElementBridge(graphics.getFontInfo());
ctx.putBridge(pdfTextElementBridge);
PDFAElementBridge pdfAElementBridge = new PDFAElementBridge();
AffineTransform currentTransform = new AffineTransform(1, 0, 0, 1, 0, 0);
pdfAElementBridge.setCurrentTransform(currentTransform);
ctx.putBridge(pdfAElementBridge);
ctx.putBridge(new PDFImageElementBridge());
return ctx;
}
}
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