I'm drawing inside an NSView by simply setting its layer's contents to a
CGImage which is updated for every frame, e.g. something like this:
dp = CGDataProviderCreateWithData(NULL, frameBuf, frameBufSize, NULL);
im = CGImageCreate(frameWidth, frameHeight, 8, 32, frameStride,
theColorSpace, (CGBitmapInfo) kCGImageAlphaNoneSkipFirst, dp, NULL, FALSE,
kCGRenderingIntentDefault);
view.layer.contents = (id) im;
CGImageRelease(im);
CGDataProviderRelease(dp);
This works fine except that there is no throttle so this will draw as fast as
the CPU allows, which of course is a waste of CPU cycles because the monitor
only refreshes a certain amount of times per second.
So is there a convenient way to throttle drawing to the monitor's refresh rate
or does this have to be done the hard way by querying the monitor's refresh
rate and then setting up a timer which draws in exactly those refresh intervals
or how should this be done?
Note that I'd like to avoid using OpenGL or Metal or whatever is the standard
nowadays but I'm mainly interested in an AppKit solution...
--
Best regards,
Andreas Falkenhahn mailto:andr...@falkenhahn.com
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