On 26.03.2010, at 00:00, Chris Muller wrote:
> 
>> A JPG just grows the image size of the standard image -
>> but maybe we should connect Squeak to a free wallpaper service ... ;)
> 
> Once it's absorbed into the World's form is that still true?  Or is
> the InfiniteForm a "dynamically-calculated" form that stays with the
> World even after its been initially set?

The JPG is uncompressed when loaded into Squeak, so we are talking a significantly large bitmap, a few megabytes.

>  If so, I wonder how does the
> repaint performance compare with straight blitting out of the JPG
> image..

Blitting out of the uncompressed bitmap is as fast as it gets. A computed gradient would be somewhat slower, but maybe not by much. My hunch is it would be worth it to avoid the large space overhead - but measuring would be better of course.

> If a JPG source guarantees a greater image size, then I would prefer
> to avoid it in favor of either a tiny patterned image or InfiniteForm
> (or equivalent)..

+1

- Bert -