[haiku-appserver] BView::ClipToPicture

Well, I promised Adi I would've written that function, and so I did. :)

Here: http://digilander.iol.it/burton666/ClipToPicture.zip

You can find source code and binaries for a test application I wrote, and, in 
View.cpp, the "interesting" methods (ClipToPicture/ClipToInversePicture and the 
private method DoPictureClip).
What is the app supposed to do ? You click on one of the two buttons and you 
should get the image on the left replicated on the right, either as is or 
"inverted".


All you need to do is a copy/paste into our View.cpp and you're done.

If you want to test them, just run the included binaries (or compile the app by 
yourself, using the makefile or the BeIDE project included).

Note: the code isn't really optimized, in fact we take a big speed hit from 
be's methods (they're something like 200 times faster :PPP), but at least the 
functions are done. Other guys can look at them and optimize/fix them if 
needed. (First: make it work).

Thanks go to Marc Flerackers aka BNickName and Francois Revol aka mmu_man for 
their help. I would be still in the realm of BBitmap padding if it wasn't for 
them :)

Bye!


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