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PixelsToInches method

Dieser API-Eintrag behält Bezeichner, Signaturen, Codeblöcke und PDF-Begriffe in ihrer Originalform.

Component: TPdf · Unit: PDFium

Convert a pixel measurement at the given DPI to inches.

Syntax

class function PixelsToInches(Pixels: Integer; DPI: Integer = 96): Double;

Description

Static helper that converts a measurement value between pixel / point / inch units. PDF coordinates are expressed in points (1 pt = 1/72 inch).

Convert a pixel measurement at the given DPI to inches. The conversion formula is value / DPI.

These helpers are class functions; you can call them without instantiating TPdf (e.g. TPdf.PixelsToInches(96)).

Remarks

DPI defaults to 96 (the Windows default screen DPI) when the parameter is omitted.
Use these helpers to translate between TBitmap pixel coordinates and PDF rectangles before passing them to AddImage / Annotation APIs.
Inverse conversions are available as the matching *To* functions on TPdf and TPdfView.

Example

var
  Margin: Double;
begin
  Margin := TPdf.PixelsToInches(300);
  Memo1.Lines.Add(Format('PixelsToInches(300) = %.4f', [Margin]));
end;

See Also

PixelsToPoints, PointsToInches, PointsToPixels