Re: NSView -drawRect optimization
Re: NSView -drawRect optimization
- Subject: Re: NSView -drawRect optimization
- From: John Stiles <email@hidden>
- Date: Wed, 13 Feb 2008 09:41:56 -0800
Paul Bruneau wrote:
On Feb 12, 2008, at 5:17 PM, John Stiles wrote:
Paul Bruneau wrote:
If anyone likes looking at newbie code for stupid things, now is
your chance. I'll happily take any tips, comments, or even derision.
My biggest fear is to hear "There's nothing you can do about
it--stuff takes time" to which I would respond, "Then how does
Blizzard do it!? I know they are drawing more than 226 rectangles!"
At Blizzard, we render graphics with OpenGL, which is going to be a
lot faster than anything you can do on the CPU :)
I haven't looked at your code, but have you experimented with
CoreAnimation at all? This would let you leverage the GPU for your
drawing as well, which might help.
Thank you John, I knew there had to be some kind of magic involved. I
have not experimented with CoreAnimation yet as I have heeded mmalc's
warnings about not jumping in too early with advanced Cocoa topics :)
At this point, I think I will be able to gain a lot of performance
with smarter choices about when to draw different parts of my view but
if I am still stuck after that I will look at CA. Thanks again for
your kind reply.
Your analysis of the situation seems good to me :)
I would suggest, though, that CoreAnimation is pretty easy to grasp. If
you've got some spare time, check out the demo/example code and I bet
you will be able to understand it.
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