owlfish-qualcomm

An add-on for Owlfish (install Owlfish first, same version). It lets Owlfish apply its warm tint, dimming, saturation and colour correction in the display hardware, as on the Jolla Phone, instead of drawing them with the graphics processor. Screenshots no longer include the tint.

It adds a small system service that sets the display's colour matrix for Owlfish, through Qualcomm's display colour manager. It runs as the graphics user, because the display's colour service only accepts system users, and only accepts calls from the home screen. Owlfish checks the hardware at every start and uses the graphics processor if the check fails.

Not needed on the Jolla Phone. Other devices with Qualcomm's display colour manager may work too; reports are welcome.

After installing, restart the phone. To go back to the graphics processor, uninstall this package.

Tested devices: https://github.com/ccontino84/owlfish#tested-on

Source, documentation and issues: https://github.com/ccontino84/owlfish License: LGPL-2.1-only. Written with an AI coding assistant (Claude); designed, reviewed and tested on real devices by the author.