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Originally Posted by jlipkin  I'm interested in how you found the info above. I have been searching the forums for a while and did not uncover anything about how thumbnails were rendered. |
I'm only speculating based on experience and clues, not because I've ever found an actual
statement by Adobe on the subject. (God forbid!)
- first and foremost, the lack of any acknowledgement that Lightroom employs specific features of video display drivers
- the posted system requirements for Lightroom
- the comments on the Adobe forums (and the dearth of discussions on particular video display adapters)
- my background in applications that work with imagery and how they behave under different programming techniques
- the fact that my Lightroom performs poorly enough that I can actually watch it paint the screen
Notably, watching the processor utilization when working in the library is inconclusive. It may be more disk-limited than processor limited if previews are already cached.
I just spent a bunch of time searching the Adobe forums and came up with nothing but more vague clues. One thing I did learn is that Lightroom does use some OS-specific features for special effects, such as fading parts of the interface in and out (and the OS may employ display driver features to off-load that sort of operation). I still found no indication that Lightroom would directly use any special driver features for actual image processing.
The most curious thing I encountered were threads where clearly some individuals were seeing super-responsive performance out of the Lightroom interface whereas other were not. Alas, I didn't find one single applicable explanation for why this would be so. Display drivers certainly could be implicated, but nobody seems to be studying it.
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