[gl2ps] Setting text color

[David Lonie]

On Mon, Jun 18, 2012 at 5:25 PM, David Lonie <david.lonie at kitware.com> wrote:
> For now I can hack in an extra color arg to the gl2ps
> text calls, but I hate making changes to upstream sources.

I've attached a patch that adds an rgba option to gl2psTextOpt.
Perhaps this could be included in a future release for others who may
run into this issue?

Dave
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