[argyllcms] Re: Programming the video card
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 29 Dec 2019 15:48:20 +1100
graxx@xxxxxxxxxxxx wrote:
I confess there's something 'voodoo' about using the GammaRamp with more
than 8 bit 'entry sizes'? Everywhere I look, I can only see references to
arrays of 256 entries.
Please note the distinction between number of entries (256) and
the entry size (16 bit).
There was one video I watched where the person mentioned '30' bits per pixel
plus 2 extra bits for 'transparency'. I still have to put my hand on a
Microsoft blurb that documents this 'fact' but, if that is the case, then I
think I'm on the right track.
Sometimes the API information values don't make a whole lot of sense.
This can be due to the hardware being more complex than
it seems (and badly or not documented). i.e. some hardware apparently
has additional processing between the frame buffer and the RAMDAC,
which may change the data path width.
Graeme Gill.
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