SetInv_sRGB | Graphics32

Declaration

pascal

procedure SetInv_sRGB(var GammaTable: TGammaTable8Bit);

Parameter	Type	Description
`GammaTable`	`TGammaTable8Bit`	Target 256-byte table array to receive inverse sRGB values.

SetInv_sRGB populates a custom TGammaTable8Bit array with inverse sRGB (sRGB space to linear light) transfer function values.

For a normalized channel input $V = i / 255$ :

GammaTable [i] = {\begin{cases} Round (255 \cdot \frac{V}{12.92}) & if V < 0.004045 \\ Round (255 \cdot {(\frac{V + 0.055}{1.055})}^{2.4}) & if V \geq 0.004045 \end{cases}

pascal

var
  InvSRGBTable: TGammaTable8Bit;
begin
  SetInv_sRGB(InvSRGBTable);
  ApplyCustomGamma(Bitmap, InvSRGBTable);
end;