IDirectDrawGammaControl::GetGammaRamp

The IDirectDrawGammaControl::GetGammaRamp method retrieves the red, green, and blue gamma ramps for the primary surface.

HRESULT GetGammaRamp(
  DWORD  dwFlags,
  LPGAMMARAMP lpRampData
); 

Parameters

dwFlags

Not currently used; set to 0.

lpRampData

Address of a DDGAMMARAMP structure to be filled with the current red, green, and blue gamma ramps. Each array maps color values in the frame buffer to the color values to be passed to the digital-to-analog converter (DAC).

Return Values

If the method succeeds, the return value is DD_OK.

If it fails, the method can return one of the following error values:

Requirements

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in ddraw.h.
  Import Library: Use ddraw.lib.

See Also

IDirectDrawGammaControl::SetGammaRamp, Gamma and Color Controls