Type of image being used for Knob graphics. It used to be a one level deep Mipmap (ie. a flat image with sampling capabilities). It is now a regular OwnedImage since it is resized in reflow(). Use it an opaque type: its definition can change.
UIKnob which replace the knob part by a rotated PBR image.
Loads a knob image and rearrange channels to be fit to pass to UIImageKnob.
A PBR knob with texture.