XMColorAdjustContrast function

Adjusts the contrast value of a color.

Syntax

XMVECTOR XM_CALLCONV XMColorAdjustContrast(
  FXMVECTOR C,
  float     Contrast
);

Parameters

C

XMVECTOR describing the color. Each of the components of C should be in the range 0.0f to 1.0f.

Contrast

Contrast value. This parameter linearly interpolates between 50 percent gray and the color C. If this parameter is 0.0f, the returned color is 50 percent gray. If this parameter is 1.0f, the returned color is the original color.

Return Value

Returns an XMVECTOR describing the color resulting from the contrast adjustment.

Remarks

The following pseudocode demonstrates the operation of the function.

XMVECTOR colorOut;

colorOut.x = (C.x - 0.5f) * Contrast + 0.5f;
colorOut.y = (C.y - 0.5f) * Contrast + 0.5f;
colorOut.z = (C.z - 0.5f) * Contrast + 0.5f;
colorOut.w = C.w;

return colorOut;

Platform Requirements

Microsoft Visual Studio 2010 or Microsoft Visual Studio 2012 with the Windows SDK for Windows 8. Supported for Win32 desktop apps, Windows Store apps, and Windows Phone 8 apps.

Requirements

   
Target Platform Windows
Header directxmath.h

See Also

DirectXMath Library Color Functions