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DXGKDDI_SETTARGETGAMMA callback function (d3dkmddi.h)

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Allows the gamma LUT to be set on a path which is identified by the target id.

Note  This is functionally equivalent to the DxgkDdi_UpdateActiveVidPnPresentPath in previous WDDM versions if only the D3DKMDT_GAMMA_RAMP field is changed.

 

Syntax

DXGKDDI_SETTARGETGAMMA DxgkddiSettargetgamma;

NTSTATUS DxgkddiSettargetgamma(
  IN_CONST_HANDLE hAdapter,
  IN_CONST_PDXGKARG_SETTARGETGAMMA pSetTargetGammaArg
)
{...}

Parameters

hAdapter

A handle that identifies the adapter.

pSetTargetGammaArg

A pointer to a DXGKARG_SETTARGETGAMMA structure that provides the target id to be modified and provides the gamma ramp to be set.

Return value

If this routine succeeds, it returns STATUS_SUCCESS.

Note  WDDM 2.2 has cap bits for each type of supported gamma ramp so unsupported types will be skipped by the OS. Therefore, if the type is supported there should be no reason to fail the call other than unavoidable failures like monitor unplug.
 

Remarks

This function is always called at PASSIVE level so the supporting code should be made pageable.

Requirements

Requirement Value
Target Platform Windows
Header d3dkmddi.h