Drawing and filling a virtual bottle

[sbonaime]

Hi,
For my project, I want to draw a (beer) bottle that I virtually fill.

Right now, I created a function in 3 parts for filling the body, the shoulder and the neck using drawFastHLine. It is a little complicated. I saw that with LVGL we can use masking function for this kind of drawing. You draw a rectangle and yo mask it with a bottle shape.

I could also draw a rectangle and mask it with 2 white rectangles and 2 white triangles. But there is no drawFastfillTriangle

Do you have any idea to improve and simplify my drawing ?

Thanks !

[sbonaime]

OK I manage to do it using Sprite and transparent colour.