Re: If Cocoa Has Xor Draw
Re: If Cocoa Has Xor Draw
- Subject: Re: If Cocoa Has Xor Draw
- From: Brian Webster <email@hidden>
- Date: Tue, 28 Aug 2001 17:10:39 -0500
On Tuesday, August 28, 2001, at 04:45 PM, cocoa-dev-
email@hidden wrote:
Hi,
In Mac OS9's Quick Draw, we can set PenMode(srcXor), so that if we draw
the same thing twice on the same place, equal to erasing it. If there's
similar API in cocoa for these purpose?
NSImage has support for drawing images like this, by using the
NSCompositeXOR compositing operation. I don't think there is
any equivalent for drawing lines and such.
--
Brian Webster
email@hidden
http://www.owlnet.rice.edu/~bwebster