Windows stuff

[Boudewijn Rempt]

More to make up my mind than as a call to action, here's a list of 
problems I have with our current krita on windows situation...

* bugs in the input manager: strokes don't end and start with a blob. A 
tabletrelease event doesn't result in a release event, it seems.

* duplicate layer: if Krita is compiled with msvc, a duplicated layer is 
locked and we cannot paint on it. This is not a problem when compiling 
with msvc (or icc)

* 64 bits vs 32 bits: msvc under the emerge system supports only 32 bits, 
mingw supports both 64 bits and 32 bits.

* mingw makes for significantly slower performance (verified by s12a), 
even compared to msvc binaries without vc

* 32 bits msvc + vc makes for unstable binaries:
13:45:51 < Vir> boud: a quick update on the Vc on Windows situation for 
you: MSVC 2012 for 64-bit is ok now. All other MSVC variants miscompile
for AVX, leading to random crashes. OTOH MinGW GCC 4.7.2 (32-bit) works
fine. So if you want a 32-bit AVX binary, GCC is the compiler of choice.

* mingw + vc: calligra doesn't compile because we have undefined 
references:

CMakeFiles\pigmentcms.dir/objects.a(KoOptimizedCompositeOpFactoryPerArch_SSE2.cpp.o): 
In function `void 
KoStreamedMath<(Vc::Implementation)1>::genericComposite32<false, true, 
AlphaDarkenCompositor32<unsigned char, unsigned int> 
>(KoCompositeOp::ParameterInfo const&)':
q:/calligra/libs/pigment/compositeops/KoStreamedMath.h:187: undefined 
reference to `__imp__ZN23KoColorSpaceMathsTraitsIfE9unitValueE'
q:/calligra/libs/pigment/compositeops/KoStreamedMath.h:187: undefined 
reference to `__imp__ZN23KoColorSpaceMathsTraitsIfE9unitValueE'

* dbus, kded, klauncher and friends: dbus makes it necessary to ask the 
user to reboot their system, which many don't do. Besides, having these 
daemons running and making network noise really is a problem.

I have a kdelibs branch which doesn't use these daemons, but without dbus 
KFileWidget is broken. Also, the branch is old and calligra doesn't 
compile without dbus: 
ssh://git@git.kde.org/clones/kdelibs/rempt/kdelibs-stripped.git. But the 
dbus/kded/etc problems are so annoying that I am seriously tempted to 
strip the kdelibs/kderuntime dependencies out of Krita...

I wonder what to do next...

Boudewijn