1 Commits (8b3b2b0eb113426be0d817415033b6a12d201a48)

Author	SHA1	Message	Date
David Engster	6b4a548fe1	kobo: Add sysfs-based interface to frontlight ... By default, the ioctl interface is used for accessing the frontlight. However, the ioctl interface has two problems: the overall brightness seems to be lower (issue #2321), and it does not support the natural light support from the Kobo Aura One (issue #2285). This interface is the first step to fix both these issues. From observing Nickel's behavior, it appears the white/green/red intensities are roughly linear dependent on the 4th root of brightness and warmth values. This leads to a very quick increase of the intensities for lower brightness/warmth values, which then saturate for larger ones. The values for gain/offset were determined by a simple linear regression, but the plan is to create a widget so that users may adapt these values to their liking.	6 years ago