Add a watermark if its linked offsite?
 

As the title asks, I am looking to add a watermark but only if the picture is being remotely linked from another site. Any suggestions on how to do this?

I'd also like the watermark to be added to the bottom of the post, essentially underneath so that if hte pic was 80 px high - it would add a 20px watermark making the picture now 100px high. (if that makes sense)

Thanks!

I don't honestly know if thats possible. I know you can redirect people to another image with mod rewrite

Basically you would need to look up all the options for mod rewrite on the new to see what you can and can't do. Given everything I have seen those far I would say it is not doable

I have no idea how to do this.

You can do this with a script and .htaccess.



Create a file called watermark.php with this as contents:
Add this to your gallery .htaccess file or make one (change "yoursite" and the path to watermark.php)

Optional to .htaccess if you want want to let blank referrers see the image without the watermark, add this:
Create your watermark image (watermark.png).

Upload watermark.php, your .htacess file, and watermark.png to your gallery root.