FT_STROKER_LINEJOINS

These values determine how two joining lines are rendered in a stroker.

FT_STROKER_LINEJOIN_ROUND

Used to render rounded line joins. Circular arcs are used to join two lines smoothly.

FT_STROKER_LINEJOIN_BEVEL

Used to render beveled line joins; i.e., the two joining lines are extended until they intersect.

FT_STROKER_LINEJOIN_MITER

Same as beveled rendering, except that an additional line break is added if the angle between the two joining lines is too closed (this is useful to avoid unpleasant spikes in beveled rendering).