Microsoft DirectX 8.1 (C++) |
Adjusts the contrast value of a color.
D3DXCOLOR* D3DXColorAdjustContrast( D3DXCOLOR* pOut, D3DXCOLOR* pC, FLOAT c );
This function returns a pointer to a D3DXCOLOR structure that is the result of the contrast adjustment.
The return value for this function is the same value returned in the pOut parameter. In this way, the D3DXColorAdjustContrast function can be used as a parameter for another function.
This function interpolates the red, green, and blue color components of a D3DXCOLOR structure between 50 percent gray and a specified contrast value, as shown in the following example.
pOut->r = 0.5f + c * (pC->r - 0.5f);
If c is greater than 0 and less than 1, the contrast is decreased. If c is greater than 1, then the contrast is increased.
Header: Declared in D3dx8math.h.
Import Library: Use D3dx8.lib.