On Thu, Oct 6, 2011 at 8:16 AM, Paulo J. Matos <pa...@matos-sorge.com> wrote: > On 05/10/11 15:26, Stephen Bloch wrote: >>> >>> I am wondering if there's anything in place already to create an image >>> thumbnail. This is basically resizing an image. >> >> In the student graphics libraries (2htdp/image and picturing-programs, >> which is derived from 2htdp/image), you can use "scale" to scale an image up >> or down by a specified ratio. For that matter, if you want to scale the x >> and y dimensions differently, you can use "scale/xy". I believe this is a >> constant-time operation; the number-crunching comes later, when you render >> it to a bitmap for display on the screen or saving to a PNG file. >> >> > > Thanks, I can't seem find a way to open image files (jpeg, png, bmp, etc). > Is there anything like that in Racket currently? Or do we need ffi to > libjpeg, libpng, etc.?
See the various options to `load-bitmap' here: http://docs.racket-lang.org/draw/bitmap_.html?q=png#%28meth._%28%28%28lib._racket/draw..rkt%29._bitmap~25%29._load-file%29%29 -- sam th sa...@ccs.neu.edu _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
