On 9/21/07, Leonardo Kenji Shikida <[EMAIL PROTECTED]> wrote: > > Hi > > I am trying to generate tiled Jpegs from my SVG but it's generating blank > images > > My assumption is that > > Document doc = domImpl.createDocument(svgNS, "svg", null); > SVGGraphics2D svg = new SVGGraphics2D(doc); > > actually means that, when the app draws something in the graphical > context (svg), actually, nodes are being added to the SVG DOM > representation (doc) > > but when I try to generate JPEGs from the DOM, all I've got are blank > tiles, while the SVG generation works well. > > what am I doing wrong? (please check the code, I've left some comments > there) > > by the way, just another questions > > - Is there a way to save my SVG as a PDF document?
Yes. Just use the PDFTranscoder (very similar to other transcoders). - My SVG can become quite large, so I am afraid a in-memory DOM will > give me a OutOfMemory exception. Is there any workaroud? Like some > sort of file-based structure that can bypass the JVM 32-bit limitation > of addressing about up to (almost) 2 GB in the heap? What's the usual > approach for this? That is interesting but the only solution I know is tuning the JVM with the Xmx , Xms, ... options. my code looks like this > > //create DOM > > DOMImplementation domImpl = > GenericDOMImplementation.getDOMImplementation(); > String svgNS = "http://www.w3.org/2000/svg";; > Document doc = domImpl.createDocument(svgNS, "svg", null); > > SVGGraphics2D svg = new SVGGraphics2D(doc); > > //paint something in the graphical context > paintComponent(svg); > > SaveAsJPEGTiles p = new SaveAsJPEGTiles(); > int dw2 = documentWidth / 2; > int dh2 = documentHeight / 2; > > //generate 4 JPEG tiles - these tiles are being generated with the > right size, but all blank. why? > > p.tile(doc, "/tmp/tileTopLeft.jpg", new Rectangle(0, 0, dw2, > dh2)); > p.tile(doc, "/tmp/tileTopRight.jpg", new Rectangle(dw2, 0, dw2, > dh2)); > p.tile(doc, "/tmp/tileBottomLeft.jpg", new Rectangle(0, dh2, dw2, > dh2)); > p.tile(doc, "/tmp/tileBottomRight.jpg", new Rectangle(dw2, > dh2, dw2, dh2)); > > //then generate the SVG file, this image is being generated successfully > > boolean useCSS = true; > FileOutputStream fos = new FileOutputStream(new > File("/tmp/mySVG.svg")); > Writer out = new OutputStreamWriter(fos, "UTF-8"); > svg.stream(out, useCSS); > > //where tile() is > private void tile(org.w3c.dom.Document doc, > String outputFilename, > Rectangle aoi) throws Exception { > trans.addTranscodingHint(JPEGTranscoder.KEY_WIDTH, > new Float(aoi.width)); > trans.addTranscodingHint(JPEGTranscoder.KEY_HEIGHT, > new Float(aoi.height)); > trans.addTranscodingHint(JPEGTranscoder.KEY_AOI, aoi); > > TranscoderInput input = new TranscoderInput(doc); > OutputStream ostream = new FileOutputStream(outputFilename); > TranscoderOutput output = new TranscoderOutput(ostream); > trans.transcode(input, output); > > ostream.flush(); > ostream.close(); > } > > thanks in advance > > Kenji > _______________________ > http://kenjiria.blogspot.com > http://gaitabh.blogspot.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
