Re: Apple's iTunes Artwork screensaver

Subject: Re: Apple's iTunes Artwork screensaver

From: Pierre-Olivier Latour <email@hidden>

Date: Mon, 16 May 2005 14:49:07 -0700

Delivered-to: email@hidden

Provided that I'm not worried about supporting lower-end systems and
anything before Tiger, would it be a bad approach to load a Quartz
composition multiple times on the screen and getting each instance to
do all of the transition work, or would it be considerably better
(from a memory and processor usage point of view) to do everything
programmatically using OpenGL calls to load the images onto planes on
which the transitions will occur?

Assuming you cannot or do not want to put everything into a single composition file, you can definitely create multiple QCRenderers from the same composition and mix their drawing with your custom OpenGL code. The overhead of a QCRenderer is very low.

________________________________________________________

Pierre-Olivier Latour email@hidden

Quartz Composer Architect Graphic & Imaging Team

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References:

>Apple's iTunes Artwork screensaver (From: patrick <email@hidden>)