Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!sdd.hp.com!think.com!snorkelwacker.mit.edu!bloom-beacon!eru!kth.se!cyklop.nada.kth.se!news From: d88-jwa@byse.nada.kth.se (Jon W{tte) Newsgroups: comp.sys.mac.programmer Subject: Re: Different way to redraw windows? Message-ID: Date: 9 May 91 12:00:58 GMT References: <4738@ryn.mro4.dec.com> Sender: news@nada.kth.se (Mr News) Organization: Royal Institute of Technology, Stockholm, Sweden Lines: 17 In-reply-to: francis@zahpod.uchicago.edu's message of 9 May 91 03:02:39 GMT In article <.edu> francis@zahpod.uchicago.edu writes: You just use the updateRgn as your mask for CopyBits. Suppose the screen is 32bits deep, but your bitmap is one bit deep. Let's say that all the window contains is a filled square. If you hide the window and then show it again, you're gonna get an update for _all_ of the window, and copying 1->32 is definately slower than drawing a square with FillRect. (Let's say the square is small...) Now, copy 32->32 is slow enough, even on an fx... -- Jon W{tte h+@nada.kth.se - Power !