QuickTime 4 Reference

Required Atoms

A QuickTime vector data stream must contain at least two types of atoms:

One or more kCurvePathAtom atoms, each of which specifies a path to draw.

Each path can contain up to 32767 contours, each of which may contain up to 32767 points. Each point may be located on or off the curve, with the curve describing a quadratic Bezier. For an overview of paths, see "Path Shapes" .

A kCurveEndAtom atom that marks the end of the vector data stream.

There can be only one kCurveEndAtom atom in a vector data stream, and it must be the last atom in the stream.