`pdfGetTextWidthEx`

Explicit-length variant of

Category	Text measurement

Purpose — Explicit-length variant of pdfGetTextWidth.

Declarations

double __stdcall pdfGetTextWidthExA(PPDF IPDF, const char* AText, uint32_t Len);
double __stdcall pdfGetTextWidthExW(PPDF IPDF, const wchar_t* AText, uint32_t Len);

Delphi

function pdfGetTextWidthExA(const IPDF: PPDF; const AText: PAnsiChar; Len: Cardinal): Double; stdcall; external 'LumasPdf.dll';
function pdfGetTextWidthExW(const IPDF: PPDF; const AText: PWideChar; Len: Cardinal): Double; stdcall; external 'LumasPdf.dll';

Parameters

Parameter	Type	Description
`IPDF`	`PPDF`	Instance handle.
`AText`	string	Text buffer, may contain embedded NULs.
`Len`	`Cardinal`	Element count. `Len=0` returns `0.0` immediately (no NUL-terminated fallback, unlike some other `Ex` writers).

Return value — Width in points; 0.0 on any missing precondition.

See also — pdfGetTextWidth

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

public static extern double pdfGetTextWidthExA(IntPtr IPDF, [MarshalAs(UnmanagedType.LPStr)] string AText, uint Len);
public static extern double pdfGetTextWidthExW(IntPtr IPDF, [MarshalAs(UnmanagedType.LPWStr)] string AText, uint Len);

Area

Text