DdSetGammaRamp function (ddrawgdi.h)

Article
02/22/2024

[This function is subject to change with each operating system revision. Instead, use the Microsoft DirectDraw and Microsoft Direct3DAPIs; these APIs insulate applications from such operating system changes, and hide many other difficulties involved in interacting directly with display drivers.]

The DdSetGammaRamp function sets the gamma ramp for the device.

GdiEntry15 is defined as an alias for this function.

Syntax

BOOL DdSetGammaRamp(
  [in] LPDDRAWI_DIRECTDRAW_LCL pDDraw,
  [in] HDC                     hdc,
  [in] LPVOID                  lpGammaRamp
);

Parameters

[in] pDDraw

Pointer to user-mode DirectDraw device object.

[in] hdc

Reserved.

[in] lpGammaRamp

Pointer to an array of DDGAMMARAMP structures.

Return value

The return value is TRUE if the function is successful. Otherwise, it is NULL.

Remarks

It is recommended that applications use the IDirectDrawGammaControl::SetGammaRamp or IDirect3DDevice9::SetGammaRamp methods instead since these methods offer the same functionality independent of the operating system.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	ddrawgdi.h