lv_draw_sw_mask_line_points_init() function

pointer to a `lv_draw_mask_param_t` to initialize

X coordinate of the first point of the line

Y coordinate of the first point of the line

X coordinate of the second point of the line

y coordinate of the second point of the line

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