/**
* Transcodes the specified Document as an image in the specified output.
*
* @param document the document to transcode
* @param uri the uri of the document or null if any
* @param output the ouput where to transcode
* @exception org.apache.batik.transcoder.TranscoderException if an error occurred while
* transcoding
*/
protected void transcode(Document document, String uri, TranscoderOutput output)
throws TranscoderException {
if (!(document instanceof SVGOMDocument)) {
throw new TranscoderException(Messages.formatMessage("notsvg", null));
}
BridgeContext ctx = new BridgeContext(userAgent);
SVGOMDocument svgDoc = (SVGOMDocument) document;
// build the GVT tree
GraphicsNode gvtRoot = buildGVT(ctx, svgDoc);
// get the 'width' and 'height' attributes of the SVG document
width = (int) (ctx.getDocumentSize().getWidth() + 0.5);
height = (int) (ctx.getDocumentSize().getHeight() + 0.5);
SpriteGraphics2D swf2d = new SpriteGraphics2D(width, height);
gvtRoot.paint(swf2d);
tags = swf2d.getTags();
// Override width and height based on the SWF-specific bounds of the sprite contents
// However we have to correct co-ordinates back to pixels... TODO: Remove all TWIPS references!
Rect bounds = swf2d.getBounds();
width = (int) Math.rint((bounds.xMax - bounds.xMin) / 20.0);
height = (int) Math.rint((bounds.yMax - bounds.yMin) / 20.0);
}