[SDL] Re: Mouse position bugs on Mac OS X

E. Wing ewmailing at gmail.com
Mon Nov 21 13:13:40 PST 2005

It sounds like you covered everything. There isn't any behavior change
for the mouse coordinates between Panther and Tiger. It's just the
Jaguar/Panther boundary that I'm aware of. (Though we never actually
tested the fix on 10.0-10.1.)


> From: Christian Walther
> Currently, there is an inversion in QZ_PrivateCocoaToSDL(), which makes
> getting mouse coordinates work correctly (apart from the off-by-one
> bug). The bug is that the same inversion is also needed in
> QZ_PrivateSDLToCocoa(), which is used when setting mouse coordinates,
> i.e. SDL_WarpMouse(). My patch fixes that.
> > At one point I thought I did, but I remembered I ended up
> > breaking more stuff and I can't remember if I fixed this or went to an
> > OS version check to case the two different situations.
> There is no version check in the latest code, and according to your last
> changelog entry
> (http://www.libsdl.org/cgi/cvsweb.cgi/SDL12/src/video/quartz/SDL_QuartzWM.m)
> it works everywhere. And if that's true, I guess my patch should also be
> correct everywhere, but I'll still test it to be sure.
> > So be careful about testing this one between the Jaguar/Panther
> > barrier. If not done correctly, it will probably (incorrectly) invert
> > pre-10.3 systems. I would also advise testing the non-OpenGL modes and
> > maybe even the fullscreen modes.
> Yup, my test program does all combinations of GL/non-GL and
> windowed/fullscreen, and I intend to test it at least on 10.2 and maybe
> 10.1. I already did on 10.4.0, and behavior there is identical to 10.3.9.
>   -Christian
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