Radial (complex) gradient stopped working?

How-to
1

I had been using LVGL 9.1 (and NuttX), with some cherry picked commits including the new complex gradient feature to get a pretty background for some of the screens/widgets I am using. Along the way I moved to using 9.2 release and have been working on other screens.

I now find that the radial gradient is no longer present, either with V9.2 or my 9.1+cherry picks. Or Master, for that matter.

I suspect I have enabled or disabled or changed something that has caused this but I can’t see any obvious dependencies. The calls to the style setup, and subsequent adding of it where required seem to take place, but no gradient background.

Is there something I might have done that would “break” this?

2

v9.1 does not support radial gradient and other complex gradient.
v9.2 does support them,
but you must set
LV_USE_DRAW_SW_COMPLEX_GRADIENTS to 1

3

Yes, of course. My 9.1 had cherry picked the commit for radial gradients and it worked. The Kconfig settting is, of course, done.