Creating and Disposing of Text Layout Objects

ATSUI provides the following functions for creating and disposing of text layout objects:

ATSUCreateTextLayout creates an uninitialized text layout object.
ATSUCreateTextLayoutWithTextPtr creates a text layout object with style runs, a pointer to associated text, and default text layout attribute values.
ATSUCreateTextLayoutWithTextHandle creates a text layout object with style runs, a handle to associated text, and default text layout attribute values.
ATSUCreateAndCopyTextLayout creates a copy of a text layout object.
ATSUSetTextLayoutRefCon sets application-specific text layout object data.
ATSUGetTextLayoutRefCon obtains application-specific text layout object data.
ATSUClearLayoutCache clears the layout cache of a line or an entire text layout object.
ATSUDisposeTextLayout disposes of a text layout object.