[mapserver-dev] Supporting runtime substitution for the MASK layer parameter

[Seth G]

Hi Matthew,

I can't see any negatives about implementing that feature.

Have a look at layerSubstituteString at https://github.com/MapServer/MapServer/blob/1c14821bc4c6fc10e966fd05230ad71c05817c7d/mapfile.c#L6710

See https://github.com/MapServer/MapServer/blob/main/msautotest/renderers/mask_opacity.map for an existing test that makes use of a MASK and https://github.com/MapServer/MapServer/blob/main/msautotest/query/rfc62.map for a test using runtime subs. 


Seth


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On Wed, Sep 29, 2021, at 9:55 PM, Matthew Geiger wrote:
> Hello! I maintain a large mapserver-based project that makes heavy use of the 'mask' layer parameter. I'm wondering if it's possible or desired to enable this parameter for runtime substitution? If so, I'd be interested in working on this feature, and would welcome any guidance.
> 
> Thanks all! Mapserver is awesome!
> 
> -- 
> Matthew Geiger
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