Declarations

function ApplyInvGamma(Color: TColor32): TColor32; overload;
procedure ApplyInvGamma(Color: PColor32Array; Length: Integer); overload;
procedure ApplyInvGamma(Bitmap: TBitmap32); overload;

Overload Details

Overload 1

function ApplyInvGamma(Color: TColor32): TColor32; overload;

Applies global GAMMA_DECODING_TABLE to the Red, Green, and Blue channels of a single TColor32 value.

Parameter	Type	Description
Color	TColor32	Input 32-bit ARGB color value.

Type	Description
TColor32	Gamma-decoded color value in linear light space with original alpha channel preserved.

Overload 2

procedure ApplyInvGamma(Color: PColor32Array; Length: Integer); overload;

Applies global GAMMA_DECODING_TABLE in-place to a contiguous buffer array of TColor32 pixels.

Parameter	Type	Description
Color	PColor32Array	Pointer to contiguous array of TColor32 pixels.
Length	Integer	Number of pixels to process in the array.

Overload 3

procedure ApplyInvGamma(Bitmap: TBitmap32); overload;

Applies global GAMMA_DECODING_TABLE in-place to all pixels in a TBitmap32.

Parameter	Type	Description
Bitmap	TBitmap32	Target bitmap to transform in-place.

Description

ApplyInvGamma applies gamma decoding to RGB channels using the current global GAMMA_DECODING_TABLE, converting pixels into linear light space. Alpha channel values remain unchanged.

Example

var
  LinearColor: TColor32;
begin
  LinearColor := ApplyInvGamma(MyColor);
  ApplyInvGamma(MyBitmap);
end;

See also

• GAMMA_DECODING_TABLE
• ApplyGamma
• ApplyCustomGamma