Poor blitting performance?
Poor blitting performance?
- Subject: Poor blitting performance?
- From: Steve <email@hidden>
- Date: Fri, 28 Feb 2003 13:24:13 +0000
Hi,
I'm using an NSBitmapImageRep to hold a data buffer, in to which I am
doing custom drawing.
I was only getting 40 fps on a 640*480 view, so I thought it was my
drawing code. However, when I remove all code from my
drawRect: method, leaving only
[myImageRep draw];
I'm still only getting 50 fps.
Using a 500MHz G4 and Radeon 8500 on 10.2.4, this seems very slow. I'm
getting nearly double that by running the same test but using Carbon
GWorlds and CopyBits instead.
What things should I explore to improve this poor performance? How do
I get at the OpenGL bliiting routines directly, that I suppose Cocoa
must be calling?
Thanks
Steve
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