[dev] Horde_Image / polaroid-like stack

[Chuck Hagenbuch]

Quoting Michael Rubinsky <mike at theupstairsroom.com>:

> I was hesitant to put it into Horde_Image for the same reasons as   
> Chuck states, and was leaning towards using a Horde_Image_Decorator   
> that can compose all the neecessary steps - once I get all the steps  
>  isolated and implemented as methods.  My concern, though, is that   
> there might be too much difference between the gd implementation   
> (assuming I or someone else can actually figure that out ;) and the  
> im  implementation to allow doing it outside of the concrete classes.

If you can come up with a concrete example of what operations are hard  
to break down I think we can figure out what methods need to be where  
with more clarity.

-chuck