Helder Magalhães wrote:
>
> There's a recent thread [1] which may help. Search for:
>
> BridgeContext bc = c.getUpdateManager().getBridgeContext();
>
the problem is i have this class
/*
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package javarummikub;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.bridge.GVTBuilder;
import org.apache.batik.bridge.UserAgentAdapter;
import org.apache.batik.bridge.ViewBox;
import org.apache.batik.dom.svg.SAXSVGDocumentFactory;
import org.apache.batik.gvt.GraphicsNode;
import org.apache.batik.util.XMLResourceDescriptor;
import org.w3c.dom.Element;
import org.w3c.dom.svg.SVGDocument;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import org.apache.batik.ext.awt.RenderingHintsKeyExt;
/**
* Immutable class to get the Image representation of a svg resource.
*/
public final class SvgImage {
/** Root node of svg document */
private final GraphicsNode rootSvgNode;
/** Loaded SVG document */
private final SVGDocument svgDocument;
/**
* Load the svg resource from a URL into a document.
* @param url location of svg resource.
* @throws java.io.IOException when svg resource cannot be read.
*/
public SvgImage(URL url) throws IOException {
String parser = XMLResourceDescriptor.getXMLParserClassName();
SAXSVGDocumentFactory factory = new SAXSVGDocumentFactory(parser);
svgDocument =
(SVGDocument) factory.createDocument(url.toString());
rootSvgNode = getRootNode(svgDocument);
}
/**
* Load the svg from a document.
*
* @param document svg resource
*/
public SvgImage(SVGDocument document) {
svgDocument = document;
rootSvgNode = getRootNode(svgDocument);
}
/**
* Get svg root from the given document.
*
* @param document svg resource
*/
private GraphicsNode getRootNode(SVGDocument document) {
// Build the tree and get the document dimensions
UserAgentAdapter userAgentAdapter = new UserAgentAdapter();
BridgeContext bridgeContext = new BridgeContext(userAgentAdapter);
GVTBuilder builder = new GVTBuilder();
return builder.build(bridgeContext, document);
}
/**
* Get the svg root node of the document.
*
* @return svg root node.
*/
public GraphicsNode getRootSvgNode() {
return rootSvgNode;
}
/**
* Get the svg document.
* @return the svg document.
*/
public SVGDocument getSvgDocument() {
return svgDocument;
}
/**
* Renders and returns the svg based image.
*
* @param width desired width
* @param height desired height
* @return image of the rendered svg.
*/
public Image getImage(int width, int height) {
// Paint svg into image buffer
BufferedImage bufferedImage = new BufferedImage(width,
height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = (Graphics2D) bufferedImage.getGraphics();
// For a smooth graphic with no jagged edges or rastorized look.
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.setRenderingHint(RenderingHintsKeyExt.KEY_TRANSCODING,
RenderingHintsKeyExt.VALUE_TRANSCODING_PRINTING);
// Scale image to desired size
Element elt = svgDocument.getRootElement();
AffineTransform usr2dev = ViewBox.getViewTransform(null, elt, width,
height, null);
//
Problem is here ^
g2d.transform(usr2dev);
rootSvgNode.paint(g2d);
// Cleanup and return image
g2d.dispose();
return bufferedImage;
}
}
and there is only a SVGDocument and a GraphicsNode, where from neither i can
get the BridgeContext (as far as i can see, from the javadoc and
http://www.yworks.com/products/yDoc/showcase/batik-1.5/index.html this
javadoc for SVG ). The above code displays the svg-file, but the resizeing
doesn't work, the AffineTransform returned is just the
identitytransformation:
[1 0 0]
[0 1 0]
so the svg doesn't resize at all. Any hints where to get the BridgeContext
from this code would be very much appreciated :)
PS: also if i change the line:
AffineTransform usr2dev = ViewBox.getViewTransform(null, elt, width, height,
null);
to the two new lines:
UserAgentAdapter userAgentAdapter = new UserAgentAdapter();
AffineTransform usr2dev = ViewBox.getViewTransform(null, elt, width,
height, new BridgeContext(userAgentAdapter));
it also just returns the identitytransformation :S
Regards
--
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