[racket-dev] Working Cairo-bindings for Racket?

No, I'm suggesting that while I think a real binding to cairo would be a
good idea, it should be based on the code already in racket/draw and that
the code in my library is probably useless. Feel free to use any of it that
you find useful, though.

Sam
On Sep 27, 2014 5:08 AM, "Antti Karttunen" <antti.karttunen at gmail.com>
wrote:

>
>
> On Fri, Sep 26, 2014 at 4:05 PM, Sam Tobin-Hochstadt <samth at cs.indiana.edu
> > wrote:
>
>> Instead of changing my Planet package, it would be better to provide
>> an FFI to cairo based on the existing one that's in the library you
>> mention. I don't think any of my package would be useful for that,
>> though.
>>
>
>
> Did I understand right that your cairo.ss is intended to work with some
> substantially earlier version of Cairo-library, and you want to keep it
> that way?
>
> In any case, at least I realized that
> (require racket/draw/unsafe/cairo-lib)
> followed by  (define libcairo cairo-lib)
>
> is (just ?) a more portable way of saying:
>
> (define libcairo (ffi-lib "libcairo"))
> [Or in Windows: (define libcairo (ffi-lib "libcairo-2")) because it is
> called libcairo-2.dll]
>
> Like this:
> #lang racket
> (require racket/draw/unsafe/cairo-lib)
> (require ffi/unsafe)
>
> cairo-lib
> #<ffi-lib>
> > (define libcairo (ffi-lib "libcairo"))
> . . ffi-lib: couldn't open "libcairo.dll" (The specified module could not
> be found.; errno=126)
> > (define libcairo (ffi-lib "libcairo-2"))
> > libcairo
> #<ffi-lib>
> > (eq? cairo-lib libcairo)
> #t
> >
>
> --------------------
>
>
> So I guess making my own set of bindings shouldn't be too much of
> racket-science...
>
>
> Best,
>
> Antti
>
>
>> Sam
>>
>> On Fri, Sep 26, 2014 at 8:44 AM, Antti Karttunen
>> <antti.karttunen at gmail.com> wrote:
>> >
>> > Another question:
>> >
>> > Would it be a big job to edit the bindings in
>> >
>> http://planet.racket-lang.org/package-source/samth/cairo.plt/1/0/cairo.ss
>> > so that it worked with the current
>> >
>> > (require racket/draw/unsafe/cairo-lib)
>> >
>> > cairo-lib
>> > #<ffi-lib>
>> >
>> > ?
>> >
>> > I guess it's not just question of "deprecated names for Cairo
>> functions" as
>> > mentioned in the ticket:
>> > http://planet.racket-lang.org/trac/ticket/357
>> >
>> > but also code like: (define libcairo (ffi-lib "libcairo"))
>> >
>> > right in the beginning of .../samth/cairo.plt/1/0/cairo.ss
>> > ?
>> >
>> >
>> > Yours,
>> >
>> > Antti Karttunen
>> >
>> >
>> > _________________________
>> >   Racket Developers list:
>> >   http://lists.racket-lang.org/dev
>> >
>>
>
>
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