[racket-dev] gracket on retina

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Wed Feb 27 12:53:44 EST 2013

At Wed, 27 Feb 2013 12:31:06 -0500, David Van Horn wrote:
> Having recently upgraded to a retina display mac, I see the problem 
> pointed out in this PR:
>     http://bugs.racket-lang.org/query/?cmd=view&pr=12909
> Is there some way for me to help?  If pointed in the right direction, I 
> can try to patch things.  Short of that, I can be a guinea pig.
> David

Unfortunately, I have no idea of what needs to be done. I think either
XCode or NSApplicationMain() must do the right magic to make applications
work in Retina-display mode, and somehow we have to recreate that.

Essentially all OS/Cocoa interaction for `racket/gui' is implemented
dynamically via the FFI, as opposed to static configuration that XCode
normally installs for a GUI application. Also, we can't call
NSApplicationMain(), because it takes over the process.

The `racket/gui' startup for Cocoa is mostly here:


For example, you'll see the call to TransformProcessType() that can
turn a console-started `racket' process into a GUI process.

The "Working without a nib" series of blog posts provides a flavor of
what `racket/gui' has to do:


That was written long before Retina displays, though, and I haven't run
across any updates that look relevant.

Posted on the dev mailing list.