Re: Gorm source reorganization

[Fred Kiefer]

Richard Frith-Macdonald wrote:
> Now, if only we had transparency working (and better focus handling) on 
> windows, I think it would be almost as good as on gnu/linux.  As it is, 
> I think Gorm is now quite usable on windows!

This transparency stuff is going to haunt me for ever. I really don't 
have a glue why it isn't working, but then the Windows documentation is 
not very clear here.

There are just two pieces of code in WinGState.m involved here: 
GSCreateBitmap and _compositeGState:fromRect:toPoint:op:fraction:. 
Either one of them has a stupid bug in it, or transparency drawing on 
windows just don't works that way.

The only note from the documentation I am still thinking about from time 
to time is that colour values should have their alpha value 
pre-multiplied. Not sure, what this will actually mean in code, as we 
leave it to windows to actually create the bitmaps, so I expect Windows 
should be doing whatever it needs. But perhaps this hint means more to 
you...

Fred