Hi Rolf, What you describe sounds like a plausible chain of events. A small standalone example would be a good first step. Filing a bug with the example would be a great second step. Providing a patch for the bug would be a fabulous third step.
Thanks, Thomas On Thu, Jun 28, 2012 at 8:08 AM, Rolf Sigg <rolf.s...@ergon.ch> wrote: > Hi, > > In our web application, we create dynamic pie charts with JFreeChart. > Depending on the browser brand and version, we output bitmaps or SVG. The > SVG code is produced by batik SVGGraphics2D. > > We noticed that some pie charts were empty if rendered as SVG but showing > correctly if rendered as a bitmap (using java BufferedImage.createGraphics() > **). After some investigation I found that for the faulty charts, batik > produces SVG paths with elliptical arcs that have the same start- and end > point. The SVG specification states that such arcs are omitted ( > http://www.w3.org/TR/SVG11/**implnote.html#**ArcOutOfRangeParameters<http://www.w3.org/TR/SVG11/implnote.html#ArcOutOfRangeParameters>). > Therefore, the SVG renderers in the browsers (correctly) skip these path > segments resulting in faulty chart display. > > However, in the Graphics2D API it is ok to represent circles by arcs. > Arc2D are defined by the bounding rectangle without restriction. > > Since the input API of SVGGraphics2D is Graphics2D, I would expect batik > to generate (visible) SVG representing every valid java input. Therefore I > think this is a bug in SVGGraphics2D. > > Do you agree? Do I miss something? > > Regards > Rolf > > P.S. Increasing the numeric precision may help in some situations. For me > this may be a workaround, but not a solution. > > > -- > rolf.s...@ergon.ch, +41 44 268 89 00 http://www.ergon.ch > Ergon Informatik AG, Kleinstrasse 15, 8008 Zurich, Switzerland > ______________________________**______________________________**__ > e r g o n smart people - smart software > > > ------------------------------**------------------------------**--------- > To unsubscribe, e-mail: > batik-users-unsubscribe@**xmlgraphics.apache.org<batik-users-unsubscr...@xmlgraphics.apache.org> > For additional commands, e-mail: > batik-users-help@xmlgraphics.**apache.org<batik-users-h...@xmlgraphics.apache.org> > >
