`pdfGetHTMLTextHeight`

Predict the total height pdfDrawHTMLText would occupy for

Category	HTML text measurement

Purpose — Predict the total height pdfDrawHTMLText would occupy for HTML at Width/Size, without drawing.

Description — TotalHeight = lineCount × (Size × 1.2) — same fixed 1.2 line-height factor used throughout this SDK's text-flow code (compare pdfGetFTextHeight).

Declarations

double __stdcall pdfGetHTMLTextHeight(PPDF IPDF, double Width, double Size, const char* HTML);
double __stdcall pdfGetHTMLTextHeightA(PPDF IPDF, double Width, double Size, const char* HTML);
double __stdcall pdfGetHTMLTextHeightW(PPDF IPDF, double Width, double Size, const wchar_t* HTML);

Delphi

function pdfGetHTMLTextHeightA(const IPDF: PPDF; Width, Size: Double; HTML: PAnsiChar): Double; stdcall; external 'LumasPdf.dll';
function pdfGetHTMLTextHeightW(const IPDF: PPDF; Width, Size: Double; HTML: PWideChar): Double; stdcall; external 'LumasPdf.dll';

Parameters

Parameter	Type	Description
`IPDF`	`PPDF`	Instance handle.
`Width`	`Double`	Wrap width to simulate; `<= 0` disables wrapping.
`Size`	`Double`	Font size; `<= 0` defaults to `12`.
`HTML`	string	HTML-subset fragment.

Return value — Predicted height in points; 0.0 on an invalid handle.

See also — pdfGetHTMLTextLineCount

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

public static extern double pdfGetHTMLTextHeightW(IntPtr IPDF, double Width, double Size, IntPtr HTML);
public static extern double pdfGetHTMLTextHeight(IntPtr IPDF, double Width, double Size, IntPtr HTML);
public static extern double pdfGetHTMLTextHeightA(IntPtr IPDF, double Width, double Size, IntPtr HTML);

Area

Text