// d3dkmthk.h

typedef struct _D3DKMT_BRIGHTNESS_INFO {
  D3DKMT_BRIGHTNESS_INFO_TYPE Type;
  ULONG                       ChildUid;
  union {
    D3DKMT_BRIGHTNESS_POSSIBLE_LEVELS   PossibleLevels;
    UCHAR                               Brightness;
    DXGK_BRIGHTNESS_CAPS                BrightnessCaps;
    DXGK_BRIGHTNESS_STATE               BrightnessState;
    DXGK_BACKLIGHT_OPTIMIZATION_LEVEL   OptimizationLevel;
    DXGK_BACKLIGHT_INFO                 ReductionInfo;
    BOOLEAN                             VerboseLogging;
    DXGK_BRIGHTNESS_GET_NIT_RANGES_OUT  NitRanges;
    DXGK_BRIGHTNESS_GET_OUT             GetBrightnessMillinits;
    DXGK_BRIGHTNESS_SET_IN              SetBrightnessMillinits;
    D3DKMT_BRIGHTNESS_INTERFACE_VERSION BrightnessInterfaceSupported;
  };
} D3DKMT_BRIGHTNESS_INFO;
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Windows Driver Kit DDI reference (ns-d3dkmthk-_d3dkmt_brightness_info)

_D3DKMT_BRIGHTNESS_INFO structure

Description

Contains information about the brightness of an integrated display panel.

Members

`Type`

A value of type D3DKMT_BRIGHTNESS_INFO_TYPE that indicates the type of brightness information to retrieve or set.

`PossibleLevels`

A D3DKMT_BRIGHTNESS_POSSIBLE_LEVELS structure that contains information about all possible brightness levels that the integrated display panel supports.

`Brightness`

The current brightness level.

`BrightnessCaps`

A DXGK_BRIGHTNESS_CAPS structure that represents the brightness control capabilities of the integrated display panel.

`BrightnessState`

A DXGK_BRIGHTNESS_STATE structure that represents the smooth brightness control capabilities of the integrated display panel.

`OptimizationLevel`

A DXGK_BACKLIGHT_OPTIMIZATION_LEVEL structure that represents the optimization level of brightness control.

`ReductionInfo`

A value of type DXGK_BACKLIGHT_INFO that provides the current absolute level of backlight reduction.

`VerboseLogging`

A boolean value that indicates whether Event Tracing for Windows (ETW) logging of brightness information should be verbose.

`NitRanges`

List of supported nit ranges.

`GetBrightnessMillinits`

Queries the driver for the current brightness level, in millinits.

`SetBrightnessMillinits`

Directs the driver to linearly ramp the brightness from its current brightness level to a target brightness level over a specified length of time.

`ChildUid`

An integer that uniquely identifies the child device.

D3DKMT_BRIGHTNESS_INFO - NtDoc