[mapguide-internals] Server Font Queries

[Crispin_at_1Spatial]

Thanks Walt,

I assumed it was something like that.  Font matching is OK for text/labels
but would result in completely different symbology being displayed for font
symbols that are more typically a character code in WingDings etc (though
the legend would match of course).

So back to authoring - should there be a way for the MG server to expose
it's known fonts through the API for clients such as Studio/Maestro to
understand?



Walt Welton-Lair wrote:
> 
> The Freetype library gets initialized at startup, and then the server
> loads all fonts in the system font folder.  Once the server is running it
> does not check again for new fonts.
> 
> There's probably some optimization that can be done here, e.g. lazy
> loading of fonts.  But in the case of your Asian font, if we don't load it
> at startup and instead load it on demand, then when a layer using that
> font is stylized it will take an extra 30 seconds (on your server) the
> first time.  That doesn't make for a good user experience.
> 
> Also keep in mind that stylization supports font matching - if a specified
> font is not found then it iterates through the available fonts looking for
> a reasonably close one.  At that point the server will have to load all
> the fonts.  So it's a tradeoff.  Is it better to load them all at the
> beginning, at a time when no users are active?  Or load them on demand,
> forcing users to wait longer the first time they make a request which uses
> an unloaded font?
> 
> Walt
> 
> -----Original Message-----
> From: mapguide-internals-bounces at lists.osgeo.org
> [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of
> Crispin_at_1Spatial
> Sent: Friday, November 06, 2009 6:18 AM
> To: mapguide-internals at lists.osgeo.org
> Subject: [mapguide-internals] Server Font Queries
> 
> 
> Folks,
> 
> For MapGuide text and font symbols the definition of the font is contained
> in the layer XML.
> 
> When authoring layers in Maestro there is a hard-coded set of fonts from
> an
> XML file.  These are pretty standard but limits flexibility, especially
> when
> dealing with symbol fonts that may have been loaded on to the server.  Is
> there a way through the MapGuide API do do font discovery?
> 
> Finally, I noticed on a low-powered server that at MG service start-up
> (using FileMon) there was a huge amount of font polling.  A couple of
> Asian
> sets (Batang) took 30+ seconds of MG server processing.
> 
>  Crispin
> 
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