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/*
* Copyright 2006 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.render.pcl;
// Java
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
// DOM
import org.w3c.dom.Document;
// Batik
import org.apache.batik.bridge.GVTBuilder;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import org.apache.batik.gvt.GraphicsNode;
// FOP
import org.apache.fop.render.Graphics2DAdapter;
import org.apache.fop.render.Graphics2DImagePainter;
import org.apache.fop.render.Renderer;
import org.apache.fop.render.RendererContextConstants;
import org.apache.fop.render.XMLHandler;
import org.apache.fop.render.RendererContext;
import org.apache.fop.svg.SVGUserAgent;
// Commons-Logging
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* PCL XML handler for SVG. Uses Apache Batik for SVG processing.
* This handler handles XML for foreign objects when rendering to HP GL/2.
* It renders SVG to HP GL/2 using the PCLGraphics2D.
*
* @version $Id$
*/
public class PCLSVGHandler implements XMLHandler, RendererContextConstants {
/** logging instance */
private static Log log = LogFactory.getLog(PCLSVGHandler.class);
/**
* Create a new XML handler for use by the PCL renderer.
*/
public PCLSVGHandler() {
}
/** @see org.apache.fop.render.XMLHandler */
public void handleXML(RendererContext context,
Document doc, String ns) throws Exception {
PCLRendererContext pclContext = PCLRendererContext.wrapRendererContext(context);
if (SVGDOMImplementation.SVG_NAMESPACE_URI.equals(ns)) {
renderSVGDocument(context, doc, pclContext);
}
}
/**
* Render the SVG document.
* @param context the renderer context
* @param doc the SVG document
* @param pclContext the information of the current context
*/
protected void renderSVGDocument(final RendererContext context,
final Document doc, final PCLRendererContext pclContext) {
int x = pclContext.getCurrentXPosition();
int y = pclContext.getCurrentYPosition();
Graphics2DImagePainter painter = new Graphics2DImagePainter() {
public void paint(Graphics2D g2d, Rectangle2D area) {
SVGUserAgent ua = new SVGUserAgent(
context.getUserAgent().getSourcePixelUnitToMillimeter(),
new AffineTransform());
GVTBuilder builder = new GVTBuilder();
BridgeContext ctx = new BridgeContext(ua);
GraphicsNode root;
try {
root = builder.build(ctx, doc);
// If no viewbox is defined in the svg file, a viewbox of 100x100 is
// assumed, as defined in SVGUserAgent.getViewportSize()
float iw = (float) ctx.getDocumentSize().getWidth() * 1000f;
float ih = (float) ctx.getDocumentSize().getHeight() * 1000f;
float w = (float) area.getWidth();
float h = (float) area.getHeight();
g2d.scale(w / iw, h / ih);
root.paint(g2d);
} catch (Exception e) {
log.error("SVG graphic could not be built: "
+ e.getMessage(), e);
return;
}
}
public Dimension getImageSize() {
return new Dimension(pclContext.getWidth(), pclContext.getHeight());
}
};
try {
Graphics2DAdapter adapter = context.getRenderer().getGraphics2DAdapter();
adapter.paintImage(painter, context,
x, y, pclContext.getWidth(), pclContext.getHeight());
} catch (IOException ioe) {
((PCLRenderer)context.getRenderer()).handleIOTrouble(ioe);
}
}
/** @see org.apache.fop.render.XMLHandler#supportsRenderer(org.apache.fop.render.Renderer) */
public boolean supportsRenderer(Renderer renderer) {
return (renderer instanceof PCLRenderer);
}
/** @see org.apache.fop.render.XMLHandler#getNamespace() */
public String getNamespace() {
return SVGDOMImplementation.SVG_NAMESPACE_URI;
}
}
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