FMX.Utils.Luminance

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Delphi

function Luminance(const AColor: TAlphaColor): Single;

C++

extern DELPHI_PACKAGE float __fastcall Luminance(const System::Uitypes::TAlphaColor AColor);

Properties

Type	Visibility	Source	Unit	Parent
function	public	FMX.Utils.pas FMX.Utils.hpp	FMX.Utils	FMX.Utils

Description

Calculates the relative luminance of the given TAlphaColor.

Luminance returns an integer value in range [0-1], corresponding to the luminance of AColor.

• A Luminance value of 1 indicates Light color.
• A Luminance value of 0 indicates Dark color.

See Also

• System.UITypes.TAlphaColor
• System.UITypes.TAlphaColorRec
• System.UITypes.TColor
• Colors in FireMonkey
• Relative luminance