[argyllcms] Re: Argyll and 30-bit colors
- From: Ver Greeneyes <vergreeneyes1@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 16 Aug 2016 13:44:18 +0200
Yes. My GeForce 8600 GT card has 10 bit RAMDAC values, and they are output
(via analog VGA) to my old CRT. It's measurably 10 bpc.
Cool, that's good to know.
I'm not sure what you mean. dispcal already sets 10 bit (or whatever)
test patch
values if the RAMDAC entry size permits it.
But the test patches are limited to being displayed in 8-bit, right? At
least on Windows, and ignoring madVR's dithering.
I was thinking you could modify the RAMDAC directly to adjust the colors
being displayed, instead of adjusting the values of the test patches and
using a linear RAMDAC.
From the contents of these, it seems that neither MS nor
Apple have current native operating systems support for 30 bit
frame buffers, both relying on OpenGL rendering
to access it. This is a considerable obstacle
for non-OpenGL based applications, so it
makes it less likely that many applications will
make use of it.
So if I understand correctly, OpenGL applications are able to punch through
the 8-bit compositor and display 30-bit colors, but everything else running
in windowed mode is limited by the compositor? I know madVR supports 10-bit
colors in fullscreen exclusive mode using Direct3D 11, but that bypasses
the compositor as well.
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