Re: Speed problems using NSImage. Solution?
Re: Speed problems using NSImage. Solution?
- Subject: Re: Speed problems using NSImage. Solution?
- From: John Stiles <email@hidden>
- Date: Sun, 07 Jan 2007 17:47:25 -0800
Erik Buck wrote:
NSImage is ultimately implemented on top of OpenGL too.
This is highly misleading.
NSImage doesn't use the GPU. It renders into a RAM back-buffer, using
exclusively CPU-based algorithms. This RAM back-buffer is later DMAed
and blit to the screen by the WindowServer using OpenGL.
All of the benefits that one traditionally associates with OpenGL and
GPU-based rendering are lost when using NSImage.
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