At Mon, 11 May 2015 00:30:05 +0200, Jens Axel Søgaard wrote: > 2015-05-11 0:07 GMT+02:00 Matthew Flatt <mfl...@cs.utah.edu>: > > > If you're on OS X, try creating the bitmap with > > > > (send canvas make-bitmap screen-width screen-height) > > > > instead of > > > > (make-object bitmap% screen-width screen-height) > > > > Roughly, using the `make-bitmap` method creates a bitmap that's on the > > graphics card instead of main memory. > > > Two thoughts: > - will make-screen-bitmap work too?
No, only the `make-bitmap` method. See also http://docs.racket-lang.org/draw/overview.html#%28part._.Portability%29 > - If I insert images in the teaching languages, > do they become screen-bitmaps automatically? No, I don't think so. It's possible that it would make sense for `freeze` to use `make-bitmap`-method bitmaps. The `pict->pre-render-pict` function is similar to `freeze`, except that it's for picts in Slideshow, and it does use the `make-bitmap` method of Slideshow's canvas. (As you might guess, Slideshow was the original motivation for the feature.) I'm not certain that using a `make-bitmap` method would make as much sense even for `freeze`, since those images are less tied to a specific destination. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
