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Re: Threaded drawing

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Re: Threaded drawing

Subject: Re: Threaded drawing
From: Jens Alfke <email@hidden>
Date: Mon, 09 Dec 2013 14:04:49 -0800

>> The single CGContextDrawImage in drawRect: should end up essentially being a memcpy which will be ridiculously fast

The bottleneck for image blitting is copying the pixels from CPU RAM to GPU texture RAM. This is often a bottleneck in high-speed image drawing, and I know that Quartz goes through contortions to try to eliminate it whenever possible.

—Jens

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