Re: ANN: PikoPixel pixel-art editor

[Riccardo Mottola]

Hi Josh,

first, compliments for writing an application and taking the time to 
port it over on GNUstep. A screenshot running on it would be a nice 
addition on the web-page too. Nice that you have done the effort of 
providing GS makefiles and the extra effort!

I haven't built your app yet though.

Josh Freeman wrote:
> > 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.

Interesting. I thought at first that you were using much Obj-C 2.0 code 
and ARC code, but then the webpage mentions 10.4 as supported Mac 
version, so a target that in theory GNUstep and also the GCC runtime 
should support well.

About everything which doesn't work of 10.4 should be *really* pretty 
much a bug now. But stuff in the runtime is a bit more tricky.


>     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.

Please do that. If you find the time to suggest a patch, it is always 
welcome. If you find a similar bug report existing you may also extend 
it instead of writing a new one.

Riccardo