Hi,
I want to write a map created by Geotools to a SVG image using Apache Batik, as
suggested here
http://docs.geotools.org/latest/userguide.old/library/render/gtrenderer.html#svg
and here
http://xmlgraphics.apache.org/batik/using/svg-generator.html
I set both the dependencies for gt-svg and the batik library.
Unfortunately, the renderer freezes when calling renderer.paint(svgGenerator,
imageBounds, mapBounds); see code below.
When I step into the method, an exception is thrown at
java.util.concurrent.FutureTask:innerRunandReset()
after labelCache.end(graphics, paintArea); is called at StreamingRenderer:854
and the thread freezes at java.util.concurrent.ThreadPoolExecutor:1130.
Does anyone know why this happens, and does anyone know a solution for this?
(I'm using gt 9.4)
I really need this feature...
Cheers, Philipp
PS: Here's my code:
protected synchronized void saveSVG(String fileName) throws
InterruptedException{
writingSVG = true;
System.out.println("Rendering image...");
GTRenderer renderer = new StreamingRenderer();
MapContent map = mapFrame.getMapContent();
renderer.setMapContent(map);
Rectangle imageBounds = null;
ReferencedEnvelope mapBounds = null;
try {
mapBounds = mapFrame.getMapPane().getDisplayArea();
double heightToWidth = mapBounds.getSpan(1) / mapBounds.getSpan(0);
imageBounds = new Rectangle(
0, 0, width, (int) Math.round(width * heightToWidth));
} catch (Exception e) {
// failed to access map layers
e.printStackTrace();
throw new RuntimeException(e);
}
// Get a DOMImplementation.
DOMImplementation domImpl =
GenericDOMImplementation.getDOMImplementation();
// Create an instance of org.w3c.dom.Document.
String svgNS = "http://www.w3.org/2000/svg";;
Document document = domImpl.createDocument(svgNS, "svg", null);
// Create an instance of the SVG Generator.
SVGGeneratorContext svggencon =
SVGGeneratorContext.createDefault(document);
SVGGraphics2D svgGenerator = new SVGGraphics2D(svggencon, true);
svggencon.setComment("Generated by GeoTools2 with Batik SVG Generator");
svgGenerator.setPaint(Color.WHITE);
svgGenerator.fill(imageBounds);
try {
renderer.paint(svgGenerator, imageBounds, mapBounds);
System.out.println("Writing " + fileName + "...");
File fileToSave = new File(fileName);
fileToSave.mkdirs();
// Finally, stream out SVG to the standard output using
// UTF-8 encoding.
boolean useCSS = true; // we want to use CSS style attributes
FileWriter out = new FileWriter(fileToSave);
svgGenerator.stream(out, useCSS);
System.out.println("...done!");
writingSVG = false;
notifyAll();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
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