On Sep 13, 2011, at 4:03 AM, Robby Findler wrote: > That would be a bug (if an entire width*height bitmap were being > re-created and thrown away each time and the program was just creating > a few circles instead of creating a bitmap of that size). > ... > A 2htdp/image is just a tree where overlays (and things like that) are > interior nodes and leaf nodes are things like circles.
Right, but at some point it gets rendered to the (presumably pixel-map) graphics device. IIRC, this is done by a function named "render" that returns a bitmap, and the resulting bitmap is then drawn on the screen, which would indeed mean that an entire width*height bitmap was being re-created and thrown away each time. Stephen Bloch sbl...@adelphi.edu _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
