Another way is to use org.apache.batik.dom.util.DOMUtilities.writeDocument(org.w3c.dom.Document doc, java.io.Writer w)
Don't know whether it's faster or not, but it's worth a shot. It works pretty well for me, but my SVGs are smaller than yours... Good luck! - Bibek On Fri, 6 Feb 2004, Magic Finger wrote: > Hello, > > I have serious performance problems when writing out the SVG DOM tree by the > Batik SVG-Generator method > org.apache.batik.svggen.SVGGraphics2D.stream(...). > > Writing out ~ 20.000 lines to a SVG file by method SVGGraphics2D.stream(...) > with BufferedWriter takes ~3 minutes -- that's unbelievable slow. > The resulting size of the SVG file is ~1.3 MB. > > Does anybody can tell me how to accelerate file writing, or is it just a > normal, poor behaviour of Batik's internal SVGGraphics2D.XmlWriter ? > > And any idea how to give a "I am working..." feedback to users while > streaming out the DOM tree contents to an SVG file, e.g. by showing a > progressbar ? > > The DOM tree contents are just lines and the resulting SVG file looks like > this: > -------------------------------------------------------------------------- > <?xml version="1.0"?> > > <!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.0//EN' > 'http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd'> > <svg fill-opacity="1" xmlns:xlink="http://www.w3.org/1999/xlink"; > color-rendering="auto" color-interpolation="auto" text-rendering="auto" > stroke="black" stroke- linecap="square" stroke-miterlimit="10" > shape-rendering="auto" stroke-opacity="1" fill="black" > stroke-dasharray="none" font-weight="normal" stroke-width="1" > xmlns="http://www.w3.org/2000/svg"; font-family="'sansserif'" > font-style="normal" stroke-linejoin="miter" font-size="12" > stroke-dashoffset="0" image-rendering="auto"> > <!--Generated by Foo--> > <defs id="genericDefs" /> > <g> > <g fill="white" stroke="white"> > <rect width="562" x="0" height="378" y="0" stroke="none" /> > </g> > <g stroke-linecap="round" fill="rgb(204,255,204)" > text-rendering="optimizeLegibility" stroke-linejoin="round" > stroke="rgb(204,255,204)" stroke- width="0.375"> > <line y2="217" fill="none" x1="222" x2="222" y1="217" /> > ... > <line fill="none" x1="60" x2="61" y1="153" y2="153" stroke="blue" > stroke-width="0.5" /> > ... > <line fill="none" x1="477" x2="477" y1="258" y2="258" stroke="black" > stroke-width="2" /> > ... > </g> > </g> > </svg> > -------------------------------------------------------------------------- > > The lines were generated for a JPanel by explicetely calling its > paintComponent(Graphics g) method with an instance of SVGGraphics2D as the > parameter 'g' (please see code snippets below): > -------------------------------------------------------------------------- > ... > File svgFile; > ... > DOMImplementation domImpl = > GenericDOMImplementation.getDOMImplementation(); > Document myFactory = > domImpl.createDocument(/*null*/SVGDOMImplementation.SVG_NAMESPACE_URI, > "svg", null); > SVGGeneratorContext ctx = SVGGeneratorContext.createDefault(myFactory); > > ctx.setComment("Generated by Foo"); > > SVGGraphics2D svgGenerator = new SVGGraphics2D(ctx, false); > ... > MyJPanel panel = new MyJPanel(); > .... > panel.paintComponent(svgGenerator); > .... > FileOutputStream fileout = new FileOutputStream(svgFile); > Writer out = new BufferedWriter(new OutputStreamWriter(fileout, > "UTF-8"), 131072/*buffersize=128kB*/); > > boolean useCSS = false; // CSS style attribute > svgGenerator.stream(out, useCSS); > ... > -------------------------------------------------------------------------- > > class MyJPanel extends JPanel { > ... > BasicStroke strokeLine = new BasicStroke(thicknessLine, > BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND); > ... > > public void paintComponent(Graphics g) { > > Graphics2D g2 = (Graphics2D) g; > > int maxX = this.getSize().width; > int maxY = this.getSize().height; > > // set white background > g2.setColor(Color.white); > g2.fillRect(0, 0, maxX, maxY); > > ... > // loop over ~ 20.000 lines with different colors and strokes > ... > g2.setColor(colorLine); > g2.setStroke(strokeLine); > g2.draw(new Line2D.Double(line[i].startX, line[i].startY, > line[i].endX, line[i].endY)); > ... > } > } > -------------------------------------------------------------------------- > > Thanks in advance for any help or tips !!! > > Maik Diergardt > extreme.soft > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
