THPDFPage.GetVerticalTextAdvance Method
Measures a Unicode text run's vertical advance in the current page measurement unit
Declaration
function GetVerticalTextAdvance(const Text: WideString): Single;Parameters
Text contains the UTF-16 text to measure
Return value
Returns the sum of per-scalar vertical advances scaled by the current font size
Usage notes
- Supplementary Unicode scalars represented by surrogate pairs count as one glyph lookup
- The calculation uses registered vertical metrics when available and configured defaults otherwise
- Use the result to place a following run, annotation, or parallel column