Re: ANN: PikoPixel pixel-art editor

[Josh Freeman]

Hi Fred,

On Sep 19, 2015, at 7:20 AM, Fred Kiefer wrote:

> Hi Josh,
>
> thank you very much for porting this great code over to GNUstep.
>
> I am at the moment trying to get it running on gcc with the gcc objc
> runtime. I know this isn't the supported constellation, but I would  
> like
> to at least understand what features are missing in this setup.

   PikoPixel's implementation of method-swizzling doesn't work with  
the gcc runtime because the runtime's function, class_replaceMethod(),  
behaves differently than on the objc2 or Apple runtimes. That's the  
only issue I know of (though I didn't test much further on gcc after  
finding it), so in theory, a reimplementation of method-swizzling (in  
NSObject_PPUtilities_MethodSwizzling.m) that removed/reworked the  
class_replaceMethod() calls could allow PP to use the gcc runtime.


> I parallel I am digging through your GNUstep specific changes. I  
> already
> found the NSMatrix additions and the cairo non-anti-alias stuff. I am
> going to add code into GNustep that supports this to make specific
> additions for GNUstep unnecessary. In theory it should be possible to
> just reuse your Cocoa code on GNUstep. Where this isn't possible,  
> please
> file a bug report against GNUstep, preferable with an attached patch.

    I kept an internal list with brief, 1-to-2-line descriptions of  
issues (now at about 17 items) that needs to be expanded into full bug  
reports on savannah when there's time - I wrote one up so far: http://savannah.gnu.org/bugs/?45442 
 . I'd be happy to send the raw list to you - or post it to the  
developer mailing list - if that would be useful.


> Once again thank you and I will keep you updated on my progress.

   Thanks, please do!


> Cheers,
> Fred

Cheers,

Josh



> Am 18.09.2015 um 21:57 schrieb Josh Freeman:
> >   PikoPixel is a free Mac OS X pixel-art editor that's currently in
> > beta for its initial 1.0 release.
> >
> >   The latest beta version, 1.0 BETA5, is the first source-code  
> > release
> > (AGPL v3), and the first version that also runs on GNUstep.
> >
> >   PikoPixel GNUstep binaries aren't available yet (haven't gotten
> > around to figuring out GS standalone application packaging), so for  
> > the
> > moment, PikoPixel must be built from source.
> >
> >   Requirements for compiling PikoPixel are a recent version of the
> > GNUstep development environment (June 2015 or later) and the libobjc2
> > runtime. Also, PP's only been tested so far under Clang, and on
> > Debian-based Linux distros (Ubuntu & Mint), so there may be issues  
> > with
> > other configurations.
> >
> >   PikoPixel's source code archive is linked at the bottom of the
> > webpage (not the green "Download" arrow, which downloads the Mac-only
> > binary):
> > http://twilightedge.com/mac/pikopixel/
> >
> >   Please send questions, comments, or issues to pikopixel (at)
> > twilightedge (dot) com.
> >
> > Cheers,
> >
> > Josh Freeman
> > Twilight Edge Software
> > http://twilightedge.com