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Blitting directly to the screen...

In my real-time video processing app Isadora., a common situation is that the processing is done at 320x240, and then, blown up to 640x480 when it is displayed on the screen. I wasn't happy with the performance of either CopyBits or a Decompression Sequence, so I wrote an Altivec routine that doubles the pixels and blits the them right to the desitination pixel map. Works great on both the main and second screens on my Titanium Powerbook.

My question is: am I going to run into trouble with this on various platforms/hardware, etc? E.g., will it work on desktop systems with external video cards?

Thanks in advance for your advice.

Cheers,
Mark Coniglio
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Mark Coniglio | email@hidden
TroikaTronix | http://www.troikatronix.com/
Isadora. | http://www.troikatronix.com/isadora.html
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