[Zope] Photo: somes issues and thoughts

[J M Cerqueira Esteves]

* J M Cerqueira Esteves <jmce@artenumerica.com> [2002-01-04 06:40 +0000]:
> while Photo uses (with integer division, therefore with truncation everywhere):
> 
>   if hM > h0 * wM / w0:
>     height = h0 * wM / w0
>     width = wM
>   else:
>     height = hM
>     width =  w0 * hM / w0

... which by the way has idempotency problems.  In my example, 
a 272×281 pic allowed to have wM=480 and hM=480, this gives 
464×480 as dimensions respecting the original aspect ratio.   
But if one specifies (wM, hM)=(464,480) and starts again with 272×281,
the final result is then (464, 479) instead of the expected (464,480)...