Hi Vic,
That feels great. For improving the possibilities of getting your improvements into Geoserver core you could make a JIRA issue into https://osgeo-org.atlassian.net/projects/GEOS and refer to a pull request in GitHub. I hope that the developers will tell you what parts of this document http://docs.geoserver.org/stable/en/developer/ are relevant for you. Test case at least is probably needed.
Regards,
-Jukka Rahkonen-
···
Kirk, Victor wrote:
I’m a java developer primarily and I have made the required changes to my geoserver instance to support what I need, but I added them to the core geoserver watermarking code to take a ratio of the tile size and a zoom level to toggle the watermark on at.
It works well and does the job, my concern was maintaining a separate branch of geoserver. Is this of enough interest to others to include in geoserver? I am however hoping to find the time to turn my code into a plugin rather than having to modify geoserver’s core.
BTW, thanks to everyone for their help and comments.
Kind Regards, Vic
From: andrea.aime@…84… [mailto:andrea.aime@…84…] On Behalf Of Andrea Aime
Sent: 13 August 2015 10:15
To: Kirk, Victor
Cc: geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] Watermarking
On Tue, Aug 11, 2015 at 5:15 PM, Kirk, Victor <VICTOR.KIRK@…7093…> wrote:
Are there other tricks I could use? To summarise the my goal, render a graphic that fills a percentage of the requested tile at a particular zoom level.
Sponsoring the development of the functionality you need would be a “nice trick” 
See the “commercial support” page at geoserver.org
Cheers
Andrea
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