pub fn shape_mask_definition() -> EffectDefExpand description
The shape-mask pass: up to MAX_SHAPE_MASKS rectangles (with rounded
corners) or ellipses, each with a feathered edge, combined in order.
Per mask i the parameters are m{i}_center, m{i}_size (full extent),
m{i}_rotation (radians, clockwise), m{i}_radius and m{i}_feather (as
fractions of the shorter side of the pass), m{i}_ellipse,
m{i}_invert, and m{i}_mode; count says how many are in use.