Hi gang, this is driving me nuts ;o( Once you have passed a SVG document to the ImageTranscoder, modifying the 'visibility'-attributes has no impact anymore on the transcoder output. It only has impact on the output when you modify the attributes before passing the document object the first time.
I know there are some points to remember when using JSVGCanvas [ see http://koala.ilog.fr/batik/mlists/batik-users/archives/msg03051.html ], however I can't seem to find the reason for this odd behaviour when using the ImageTranscoder. Here is a modified DOMRasterizer-Example taken from Batik's website to illustrate the problem (see source comments for more information) Any ideas or workarounds ? ralf ... ------------------------------------------------------------------------------------------- DOMRasterizer.java ------------------------------------------------------------------------------------------- import java.io.FileOutputStream; import java.io.OutputStream; import org.apache.batik.dom.svg.SVGDOMImplementation; import org.apache.batik.transcoder.TranscoderInput; import org.apache.batik.transcoder.TranscoderOutput; import org.apache.batik.transcoder.image.JPEGTranscoder; import org.w3c.dom.DOMImplementation; import org.w3c.dom.Document; import org.w3c.dom.Element; public class DOMRasterizer { public Document createDocument() { DOMImplementation impl = SVGDOMImplementation.getDOMImplementation(); String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI; Document document = impl.createDocument(svgNS, "svg", null); Element root = document.getDocumentElement(); root.setAttributeNS(null, "width", "450"); root.setAttributeNS(null, "height", "500"); Element e; e = document.createElementNS(svgNS, "rect"); e.setAttributeNS(null, "id", "rect"); e.setAttributeNS(null, "x", "10"); e.setAttributeNS(null, "y", "10"); e.setAttributeNS(null, "width", "200"); e.setAttributeNS(null, "height", "300"); e.setAttributeNS(null, "style", "fill:red;stroke:black;stroke-width:4"); root.appendChild(e); e = document.createElementNS(svgNS, "circle"); e.setAttributeNS(null, "id", "circle"); e.setAttributeNS(null, "cx", "225"); e.setAttributeNS(null, "cy", "250"); e.setAttributeNS(null, "r", "100"); e.setAttributeNS(null, "style", "fill:green;fill-opacity:.5"); root.appendChild(e); return document; } public void save(Document document, String filename) throws Exception { JPEGTranscoder t = new JPEGTranscoder(); t.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, new Float(.8)); TranscoderInput input = new TranscoderInput(document); OutputStream ostream = new FileOutputStream(filename); TranscoderOutput output = new TranscoderOutput(ostream); t.transcode(input, output); ostream.flush(); ostream.close(); } public static void main(String[] args) throws Exception { DOMRasterizer rasterizer = new DOMRasterizer(); Document document = rasterizer.createDocument(); /* * FIRST RENDERING */ document.getElementById("rect").setAttribute("visibility", "visible"); document.getElementById("circle").setAttribute("visibility", "hidden"); /* * This JPEG contains the rectangular shape only, which is fine */ rasterizer.save(document, "rect.jpg"); /* * SECOND RENDERING */ /* * =============================================================== * PROBLEM: Setting the visibility-attributes has no impact if the * SVG document was passed to the transcoder a *second* time * =============================================================== */ document.getElementById("rect").setAttribute("visibility", "hidden"); document.getElementById("circle").setAttribute("visibility", "visible"); // This JPEG contains the rectangular shape only, but it should show the circle rasterizer.save(document, "circle.jpg"); System.out.println("Ready"); System.exit(0); } } ------------------------------------------------------------------------------------------- --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
