DrawFormula

Text, Formula layout, Vector graphics

Description

Draws a mathematical formula using the current font, text size, text colour, glyph fallback settings, and vector rules

Syntax

Delphi

Function TPDFlib.DrawFormula(Left, Top: Double; Const Formula, AltText: WideString): Integer;

ActiveX

Function PDFlib::DrawFormula(Left As Double, Top As Double, Formula As String, AltText As String) As Long

DLL

int DLDrawFormula(int InstanceID, double Left, double Top, const wchar_t * Formula, const wchar_t * AltText);

Parameters

Left	Horizontal position of the formula bounding box
Top	Top edge of the formula bounding box
Formula	Formula source in the supported mathematical markup
AltText	Accessible spoken description used when automatic tagging opens a `Formula` structure element

Return values

Returns 1 after drawing, or 0 when Formula is empty

Remarks

Use \frac{a}{b} for fractions, x^{2} and x_{i} for scripts, \sqrt{x} or \sqrt[3]{x} for radicals, and commands such as \alpha, \Gamma, \times, \sum, and \infty for symbols

Groups can be nested and repeated measurement or drawing reuses the parsed layout while the font state remains unchanged

The DLL DLDrawFormulaA variant accepts text according to the configured ANSI mode