I just needed to set the created element namespace to
the svg namespace.
What confuses me it's that squiggle renders the
document properly while the transcoder doesn't if I
don't set the namespace.
--- Gregory <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I created a very simple SVG DOM (see code above).
>
> If I serialize the DOM to a file and view the file
> with squiggle its looks fine.
>
> If I transcode the DOM to a png, tiff or jpeg file,
> the result has the right dimensions but it's blank.
>
> Actually only a transparent layer with the
> PNGTranscoder, a white layer with the JPGTranscoder
> and a black layer with the TIFFTranscoder. But in
> any
> case I never get the actual drawing.
>
> If I build the DOM from an URI instead of from
> scratch, I get a correct result.
>
> What did I missed?
>
> --- java code ---
> public static void main(String[] args) throws
> Exception
> {
> final DOMImplementation impl =
> SVGDOMImplementation.getDOMImplementation();
> final String svgNS =
> SVGDOMImplementation.SVG_NAMESPACE_URI;
> final Document doc = impl.createDocument(svgNS,
> "svg", null);
> final Element root = doc.getDocumentElement();
> root.setAttribute("width", "504");
> root.setAttribute("height", "480");
> final Element rect = doc.createElement("rect");
> rect.setAttribute("x", "0");
> rect.setAttribute("y", "0");
> rect.setAttribute("width", "504");
> rect.setAttribute("height", "480");
> rect.setAttribute("fill", "yellow");
> root.appendChild(rect);
>
> // Save the dom to a file for verification
> final Transformer tr =
> TransformerFactory.newInstance().newTransformer();
> tr.transform(new DOMSource(doc), new
> StreamResult("/tmp/out/2.svg"));
>
> // The actual rasterization
> final Transcoder trc = new PNGTranscoder();
> final int screenDpi = 72;
> trc.addTranscodingHint(ImageTranscoder.KEY_WIDTH,
> new Float(504));
>
>
trc.addTranscodingHint(ImageTranscoder.KEY_PIXEL_UNIT_TO_MILLIMETER,
> new Float(25.4f / screenDpi));
> final TranscoderInput in = new
> TranscoderInput(doc);
> final TranscoderOutput out = new
> TranscoderOutput(new BufferedOutputStream(new
> FileOutputStream("/tmp/out/out.png")));
> trc.transcode(in, out);
> out.getOutputStream().flush();
> out.getOutputStream().close();
> System.out.println("done");
> }
>
>
>
>
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