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function dacBits = ScreenDacBits(w)
% dacBits = ScreenDacBits(windowPtrOrScreenNumber)
%
% What is the precision of the DACs on this graphics card? Always returns 8 bpc.
% Results of this function are not trustworthy, don't rely on it!
% Kept for backwards compatibility with old code for now.
%
% 2/27/02 dhb,ly Wrote it.
% 3/20/02 dgp Cosmetic.
% 3/26/02 dhb Gen2 Radeon card check.
% 6/6/02 dgp Renamed DriverDacBits. When we don't know dacBits, ask the driver.
% 6/7/02 dgp Cache the answer.
% 6/8/02 dgp Renamed ScreenDacBits.
% 6/20/02 dgp Moved all code to PrepareScreen.m.
% 10/10/06 dhb Just always return 8 bits, until we figure out how to update.
% 05/21/07 mk Return queried dac size from screen. This will return 8
% bits if it can't query real dac size.
% 06-30-23 mk Always return 8 bits. No way to find the right value atm. on
% any OS, so don't pretend to able to do so.
dacBits = 8;
warning('ScreenDacBits: Reporting made up 8 bpc, which may be too low for your setup.');
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