Le mercredi 10 août 2011 à 16:38 +0200, Emmanuel Pacaud a écrit : > Hi, > > Le samedi 06 août 2011 à 11:36 +0200, Jean Brefort a écrit : > > There are several possiblities to improve the situation: > > * use librsvg, > > * use lasem (we already optionally use it for maths equations in > > charts), > > * add appropriate code in goffice. > > > The second would avoid to depend on librsvg, but I don't know if > > Emmanuel will actively support it in the future, even in the near > > future. Actually we might also consider importing the mathml code in > > goffice. > > Why would you want to do that ?
Just a possibility if lasem went unmaintained, which might happen as it is a one man project. > > The third and most demanding solution would be to import the svg paths > > as canvas items. We already have most of what we need in the canvas, and > > we should just write the parser. > > I think you highly underestimate the difficulty of SVG rendering, shown > by the fact that all the modern web browsers fail to have a decent > coverage of the SVG 1.1 specification. I don't underestimate anything. I know it would be a long term issue. > > This would also work for wmf files > > (Valek wrote some demo code in goffice in mf-demo.c) and might be > > extended to emf which we do not support at all for now (as far as I > > know). I suppose that OpenDocument graphics (odg) would be a valuable > > target too. > > My take would be to convert wmf or odg to svg and use the best svg > library available (librsvg currently) for the rendering. Not sure that converting would make things easier. > > About charts, I'm wondering if it would be valuable to rewrite the > > rendering part using the canvas items. It would help for user > > interactions with the graph elements, but might result in some > > performance loss (difficult to know without experimenting). > > I'm not sure the conversion of the GogObjects to canvas items would > really help for user interaction. The canvas positioning logic (absolute > move and size of objects) is different to what you want for the graph > objects: relative position and size w.r.t. parent object, modification > of object properties (axis bounds). The canvas can support relative positioning. And we can any feature we need. Anyway, not a project for now. Thanks, Jean _______________________________________________ gnumeric-list mailing list gnumeric-list@gnome.org http://mail.gnome.org/mailman/listinfo/gnumeric-list
