OpenGL vs QuickTime for slideshow transitions

FROM : Paul Collins
DATE : Thu Sep 30 21:09:56 2004

Our Envision application* includes slideshow functionality with wipes
and dissolves using NSImage / Quartz drawing. We'd like to switch to
either QuickTime or OpenGL to do these transitions more efficiently. So
far, it seems like either system is capable of displaying two static
images and doing a transition from one to another. iPhoto uses OpenGL;
I'm not sure which Keynote uses for it's lovely 3D transitions.

My impression is most people prefer OpenGL for this sort of thing, but
QuickTime may be a great deal easier to code to (and may well use
OpenGl itself). So why not do things the easy way and use QuickTime?

Thanks,

Paul Collins

* http://www.opendoor.com/envision/

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