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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.Rectangle;
import java.awt.geom.AffineTransform;
import java.io.IOException;
import org.w3c.dom.Document;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.bridge.GVTBuilder;
import org.apache.batik.gvt.GraphicsNode;
import org.apache.xmlgraphics.image.loader.Image;
import org.apache.xmlgraphics.image.loader.ImageFlavor;
import org.apache.xmlgraphics.image.loader.impl.ImageXMLDOM;
import org.apache.xmlgraphics.java2d.ps.PSGraphics2D;
import org.apache.xmlgraphics.ps.PSGenerator;
import org.apache.fop.image.loader.batik.BatikImageFlavors;
import org.apache.fop.image.loader.batik.BatikUtil;
import org.apache.fop.render.ImageHandler;
import org.apache.fop.render.RenderingContext;
import org.apache.fop.svg.SVGEventProducer;
import org.apache.fop.svg.SVGUserAgent;
/**
* Image handler implementation which handles SVG images for PostScript output.
*/
public class PSImageHandlerSVG implements ImageHandler {
private static final ImageFlavor[] FLAVORS = new ImageFlavor[] {
BatikImageFlavors.SVG_DOM
};
/** {@inheritDoc} */
public void handleImage(RenderingContext context, Image image, Rectangle pos)
throws IOException {
PSRenderingContext psContext = (PSRenderingContext)context;
PSGenerator gen = psContext.getGenerator();
ImageXMLDOM imageSVG = (ImageXMLDOM)image;
//Controls whether text painted by Batik is generated using text or path operations
boolean strokeText = false;
//TODO Configure text stroking
SVGUserAgent ua
= new SVGUserAgent(context.getUserAgent(), new AffineTransform());
PSGraphics2D graphics = new PSGraphics2D(strokeText, gen);
graphics.setGraphicContext(new org.apache.xmlgraphics.java2d.GraphicContext());
BridgeContext ctx = new PSBridgeContext(ua,
(strokeText ? null : psContext.getFontInfo()),
context.getUserAgent().getFactory().getImageManager(),
context.getUserAgent().getImageSessionContext());
//Cloning SVG DOM as Batik attaches non-thread-safe facilities (like the CSS engine)
//to it.
Document clonedDoc = BatikUtil.cloneSVGDocument(imageSVG.getDocument());
GraphicsNode root;
try {
GVTBuilder builder = new GVTBuilder();
root = builder.build(ctx, clonedDoc);
} catch (Exception e) {
SVGEventProducer eventProducer = SVGEventProducer.Provider.get(
context.getUserAgent().getEventBroadcaster());
eventProducer.svgNotBuilt(this, e, image.getInfo().getOriginalURI());
return;
}
// get the 'width' and 'height' attributes of the SVG document
float w = (float)ctx.getDocumentSize().getWidth() * 1000f;
float h = (float)ctx.getDocumentSize().getHeight() * 1000f;
float sx = pos.width / w;
float sy = pos.height / h;
ctx = null;
gen.commentln("%FOPBeginSVG");
gen.saveGraphicsState();
final boolean clip = false;
if (clip) {
/*
* Clip to the svg area.
* Note: To have the svg overlay (under) a text area then use
* an fo:block-container
*/
gen.writeln("newpath");
gen.defineRect(pos.getMinX() / 1000f, pos.getMinY() / 1000f,
pos.width / 1000f, pos.height / 1000f);
gen.writeln("clip");
}
// transform so that the coordinates (0,0) is from the top left
// and positive is down and to the right. (0,0) is where the
// viewBox puts it.
gen.concatMatrix(sx, 0, 0, sy, pos.getMinX() / 1000f, pos.getMinY() / 1000f);
AffineTransform transform = new AffineTransform();
// scale to viewbox
transform.translate(pos.getMinX(), pos.getMinY());
gen.getCurrentState().concatMatrix(transform);
try {
root.paint(graphics);
} catch (Exception e) {
SVGEventProducer eventProducer = SVGEventProducer.Provider.get(
context.getUserAgent().getEventBroadcaster());
eventProducer.svgRenderingError(this, e, image.getInfo().getOriginalURI());
}
gen.restoreGraphicsState();
gen.commentln("%FOPEndSVG");
}
/** {@inheritDoc} */
public int getPriority() {
return 400;
}
/** {@inheritDoc} */
public Class getSupportedImageClass() {
return ImageXMLDOM.class;
}
/** {@inheritDoc} */
public ImageFlavor[] getSupportedImageFlavors() {
return FLAVORS;
}
/** {@inheritDoc} */
public boolean isCompatible(RenderingContext targetContext, Image image) {
if (targetContext instanceof PSRenderingContext) {
PSRenderingContext psContext = (PSRenderingContext)targetContext;
return !psContext.isCreateForms()
&& (image == null || (image instanceof ImageXMLDOM
&& image.getFlavor().isCompatible(BatikImageFlavors.SVG_DOM)));
}
return false;
}
}
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