Pavel On 5/4/19 10:50 AM, Pavel Machek wrote: > Hi! > >> I have been thinking about the last Multicolor Framework proposal by >> Dan. > > We talked on the phone... and I promissed some links. > > I'd really prefer drivers to present output power to the of the > kernel/userland, and deal with the RGB conversion else where. So if > driver was asked for (20, 50, 100), red output would go to (20/1000) W, > green (50/1000) W, ... > > RGB is described here: > > https://en.wikipedia.org/wiki/RGB_color_model (see section > "nonlinearity") > > https://en.wikipedia.org/wiki/Gamma_correction > > And concrete values are here: > > https://en.wikipedia.org/wiki/SRGB#Specification_of_the_transformation > > While playing with colors, I came up with this: > > https://github.com/pavelmachek/unicsy_demo/blob/master/monitor/notint.py > > See change_color for exact transformation (it could be improvede, > linear part is not there). It can be also used to display same color > on monitor and LED. It get somehow reasonable results for me... > Does this use the multi color framework interfaces defined here? https://lore.kernel.org/patchwork/patch/1060683/ Minus the sync, sync_enable and brightness_model interfaces. It does not look like that after looking at the notint script. Or is this your own multicolor framework implementation? We could meld these ideas together. Dan > Best regards (and good luck), > Pavel >
