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From "Alexander Klimetschek (JIRA)" <>
Subject [jira] Updated: (COCOON-2048) ImageOp: overlay a transparent image on another one
Date Thu, 19 Apr 2007 12:01:25 GMT


Alexander Klimetschek updated COCOON-2048:

    Attachment: imageop-overlay-operation-sample.patch

Adding a sample for the OverlayOperation. Needs the binary file delete.png (not part of the
patch, will add it separately) which contains transparency to show the typical usage of the
overlay operation.

> ImageOp: overlay a transparent image on another one
> ---------------------------------------------------
>                 Key: COCOON-2048
>                 URL:
>             Project: Cocoon
>          Issue Type: New Feature
>          Components: Blocks: (Undefined)
>    Affects Versions: 2.2-dev (Current SVN)
>            Reporter: Alexander Klimetschek
>         Attachments: imageop-overlay-operation-sample.patch, imageop-overlay-operation.patch
> New OverlayOperation that puts another image on top of the image used by the ImageOpReader.
Useful to overcome problems with browsers like IE that cannot put a transparent <img>
on top of a background image.
> Example usage:
>      <map:read type="image-op-overlay" src="background-image.jpg" >
>           <map:parameter name="overlay-offset-x" value="10" />
>           <map:parameter name="overlay-offset-y" value="20" />
>           <map:parameter name="overlay-source" value="overlay-image.png"/>
>      </map:read>

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