On Sep 28, 2007, at 12:47 PM, Alastair Houghton wrote:
On 28 Sep 2007, at 17:28, Kenny Leung wrote:
In the old NeXTstep days of pswraps, there was this cool
PostScript operator called "composite" that would blit bits in the
current graphics context. So if you were doing a scrolling chart,
you would just have to composite the 99% of stuff you already had
on-screen, and draw the 1% of new data.
Question 1: Does anybody know of the current Quartz equivalent for
doing this? I image that the NSScrollView/NSClipView combination
knows how to do this, but I have not been able to find the
function to do it.
