How to set the opa of lv-canvas?

oldersu · July 11, 2019, 8:20am

Hi,
I am using the lv_canvas to draw a meter, How to set the opa of the backgrond? Thanks.

kisvegabor · July 12, 2019, 4:45am

Do you mean to make the background transparent?

oldersu · July 12, 2019, 4:46am

Yes，I want to set the background of lv_canvas transparent.

kisvegabor · July 12, 2019, 5:05am

I made some test and realized that there are some issues with canvas if you are using a transparent background. It should be improved in v6.1.

So the next questions are:

Alexander_Budnik · September 1, 2020, 8:54am

Hello, you can use functions:

lv_canvas_set_palette(…)
lv_canvas_fill_bg(…)

Снимок