[argyllcms] Re: OS X 10.9 Mavericks has broken LUT manipulation
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 21 Oct 2013 11:36:46 +1100
Martin Diers wrote:
> new_dispwin: CGDisplayModePixelEncoding = '--------RRRRRRRRGGGGGGGGBBBBBBBB'
> new_dispwin: CGDisplayGammaTableCapacity = 1024
Hmm. Well it seem that 10.9 is giving us contradictory information. On the one
hand
it's saying that the frame buffer is 8 BPP, and on the other hand it's saying
that the VideoLUT tables have 1024 entries. That leaves us guessing as to
what's actually going on. Is the frame buffer really 8 bits and only 256
entries of the VideoLUT is being used ? If so, which entries ? The top
256, the bottom 256 of something else ? Or is the frame buffer really 10 bits
deep ??
We're not likely to get any answer from Apple, so we're left with guessing +
trial
and error.
I've modified these:
<http://www.argyllcms.com/disptools_osx64.tgz>
to believe the VideoLUT depth information. See
what happens.
Graeme Gill.
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