= !MapGuide RFC 108 - Support Watermark =

This page contains a change request (RFC) for the !MapGuide Open Source project.
More !MapGuide RFCs can be found on the [wiki:MapGuideRfcs RFCs] page.


== Status ==

||RFC Template Version||(1.0)||
||Submission Date|| July 30,2010 ||
||Last Modified|| Buddy Hu, July 30,2010 ||
||Author|| Buddy Hu||
||RFC Status|| Draft||
||Implementation Status||(pending)||
||Proposed Milestone|| 2.3 ||
||Assigned PSC guide(s)||(when determined)||
||'''Voting History'''||(vote date)||
||+1||||
||+0||||
||-0||||
||-1||||
||no vote|| ||

== Overview ==

This RFC updates MapGuide to support Watermark.

== Motivation ==

Some customers complaint that there is no standard way to add watermark to the Map definition.

== Proposed Solution ==

1.	Create a new resource type that contains information about watermark. This resource is used to define the what element to use(image or text) and where/how to place the watermark. Add a new XSD file to define the watermark, and the MdfModel and MdfParser are needed to updated about this change. The image for watermark will be saved as DWF file in resource data, just like the image for symbol library.

2.	User can use watermark by referencing it from map. The Map definition will be extented to reference the optional watermark resource. And a Map definition can reference multiple watermark resources. In the MgMap class, we add a "WatermarkList" field.

3.	Change the render logic for map. When all the layers have been rendered and the renderer hasn’t output the result, render the watermark into the result.

4.      For WMS publish, when a map definition is published, the watermark's resource ID will be added to each layer definition’s header. When the temporary map is created for WMS, it will read to see if any layer has watermark in its definition’s header. If it finds one, it will add the watermark into its "WatermarkList" field.

== Implications ==

MapGuide Mastro should update to add some UI to define watermark resource and add watermark into a Map.

== Test Plan ==

Build/Run on Windows/Linux 

== Funding / Resources ==

Supplied by Autodesk