[racket-dev] printing images in REPL

... which was my original question.  But thanks.

On Sat, Aug 28, 2010 at 9:36 PM, Robby Findler
<robby at eecs.northwestern.edu> wrote:
> I guess you don't have the print handler set up right.
>
> On Sat, Aug 28, 2010 at 8:23 PM, Shriram Krishnamurthi <sk at cs.brown.edu> wrote:
>> The value I was returning is whatever kind of object is returned when
>> you embed an image in the Definitions window.  That is, this was a
>> pasted, atomic image, not one created by a computation.  I guess
>> they're not treated the same, but I'm surprised that ASL processing
>> the Definitions window didn't do the right conversion...
>>
>> On Thu, Aug 26, 2010 at 8:25 PM, Robby Findler
>> <robby at eecs.northwestern.edu> wrote:
>>> At the moment there is a barn-door sized security hole in DrRacket,
>>> whereby it will take any snip% instance from the user's program and
>>> just display it in the repl. You can exploit this for Good by making
>>> the current-print of your language turn some values into snips (like
>>> images and things). 2htdp/image already does this, so that should just
>>> work if you return those. Its hard to tell what value Shriram's
>>> program was returning tho. But if it is a bitmap% object, he just has
>>> to do
>>>
>>>  (make-object image-snip% ...the-bitmap-goes-here...)
>>>
>>> We will close this hole at some point, when we have a reasonable way
>>> to allow people to add new kinds of values without the security
>>> breach.
>>>
>>> Robby
>>>
>>> On Thu, Aug 26, 2010 at 6:17 PM, Jay McCarthy <jay.mccarthy at gmail.com> wrote:
>>>> From what I can tell, it comes from ensuring that DrRacket shares the
>>>> htdp/image (or whatever) namespace with the running program so the
>>>> structs are the same and DrRacket's default renderer is detecting it.
>>>> I'm not sure how to replicate it though. (I tried for a bit so I could
>>>> make #lang frtime work.)
>>>>
>>>> Jay
>>>>
>>>> On Thu, Aug 26, 2010 at 11:55 AM, Shriram Krishnamurthi <sk at cs.brown.edu> wrote:
>>>>> What is the #lang magic that makes
>>>>>
>>>>>> (get-image-from-web "http://racket-lang.org/logo.png")
>>>>> (instantiate (class ...) ...)
>>>>>
>>>>> show the image rather than just its constructor?
>>>>>
>>>>> Shriram
>>>>> _________________________________________________
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Jay McCarthy <jay at cs.byu.edu>
>>>> Assistant Professor / Brigham Young University
>>>> http://teammccarthy.org/jay
>>>>
>>>> "The glory of God is Intelligence" - D&C 93
>>>> _________________________________________________
>>>>  For list-related administrative tasks:
>>>>  http://lists.racket-lang.org/listinfo/dev
>>>
>>
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