lv_draw_mask_line_angle_init() function
Initialize a line mask from a point and an angle.
Arguments
param
pointer to a `lv_draw_mask_param_t` to initialize
py
X coordinate of a point of the line
angle
right 0 deg, bottom: 90
side
and element of `lv_draw_mask_line_side_t` to describe which side to keep. With `LV_DRAW_MASK_LINE_SIDE_LEFT/RIGHT` and horizontal line all pixels are kept With `LV_DRAW_MASK_LINE_SIDE_TOP/BOTTOM` and vertical line all pixels are kept