[mapserver-dev] libsvg-cairo / librsvg [vote]

[Tamas Szekeres]

Thomas,

While I'm not sure about all technical details, but having librsvg licensed
with GPL is a bit discouraging. Not sure if all the distributors of
MapServer would want to change their licenses to GPL because of this.
Supporting both librsvg and libsvg-cairo in parallel seems to be a short
term approach only. If we don't think the libsvg-cairo will be supported,
that line will die shortly.

Don't we have other alternatives?

Best regards,

Tamas



2013/7/24 thomas bonfort <thomas.bonfort at gmail.com>

> Devs,
>
> While implementing svg symbology support, we made the choice to go
> with libsvg+libsvg-cairo for parsing and rendering of svg files, as
> those were the libraries that had the least dependencies. It turns out
> both those libraries are more or less abandonware, resulting in their
> absence from a number of distros, and an incompatibility with newer
> cairo apis.
>
> Along with release 6.4, I propose to add an SVG symbol implementation
> based on librsvg [ https://wiki.gnome.org/LibRsvg ], with the
> following consequences:
>
> - the user can decide at compile time wether to use libsvgcairo or librsvg
> - librsvg is maintained and present in distros, being a core component of
> gnome
> - librsvg has a number of dependencies, making its compilation/usage
> on non-standard platforms possibly problematic (c.f. previous point:
> but it is distributed by distros).
> - librsvg is GPL, with all that that might imply for people releasing
> mapserver binaries.
>
> This seems like the only way out if we want to continue supporting SVG
> symbols in the longer run. I understand the limitations, however the
> user still has the option to fall back to the current situation with
> libsvg-cairo.
>
> Jeff: concerning windows, all I can say is that librsvg support on
> windows can't be worse than that of libsvg-cairo.
>
> I'm not sure this really warrants a vote, but here goes in case anyone
> wants to veto.
>
> +1 for adding librsvg as an alternative to libsvg-cairo for rendering
> svg symbols.
>
> best regards,
> thomas
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