Variable Font Scaling within a defined Image area? Possible?

I have read through pretty much all the related online
documentation
regarding text handling within images -  But I have a
problem which I cannot
solve and I was wondering if you could point me in the right
direction.

I want to print a random line from a "message of the
day" file into a speech
bubble on an image which I then plan to use to make my
website a little more
dynamic by running the script in cron each day. - OK - done
the basic
scripting but have a problem with the image processing
(using the
imagemagick convert command)

So basically the text is a variable length but the speech
bubble area is a
fixed.

So this is where it gets tricky - I want to be able to
confine the text of
the "motd" into the area of the speech bubble of
the original image. Ideally
I need it so that the font size will scale depending on the
length of the
MOTD.

>From reading through your notes I should be able to
achieve this with the
label function (I think), but I cannot work it out.

Any help you can offer would be appreciated - it may be that
i can't do it -
please let me know

Cheers,

Chris

-- 
Link to me: http://www.linkedi
n.com/in/howarth
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