// ntddvdeo.h

typedef struct _BRIGHTNESS_NIT_RANGE {
  ULONG MinLevelInMillinit;
  ULONG MaxLevelInMillinit;
  ULONG StepSizeInMillinit;
} BRIGHTNESS_NIT_RANGE, *PBRIGHTNESS_NIT_RANGE;
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Windows Driver Kit DDI reference (ns-ntddvdeo-_brightness_nit_range)

BRIGHTNESS_NIT_RANGE structure

Description

A BRIGHTNESS_NIT_RANGE structure contains a linear range of supported millinit levels.

Members

`MinLevelInMillinit`

Lowest level in this range. Calibrated data provided to the display driver by OEMs should be taken with an On Pixel Ratio (OPR) percentage of 100% where each pixel is set to an RGB value of (255, 255, 255) or floating point equivalent.

`MaxLevelInMillinit`

Highest level in this range. Can be equal to MinimumLevelInMillinit to represent a range with just one level. For example, this could support a display with just one boost level. Calibrated data provided to the display driver by OEMs should be taken with an On Pixel Ratio (OPR) percentage of 100% where each pixel is set to an RGB value of (255, 255, 255) or floating point equivalent.

`StepSizeInMillinit`

The size of steps between valid brightness levels in the range. Minimum + StepSize * n is considered a valid level for non-negative n, where the level is equal to or below maximum. (Maximum – Minimum) % StepSize should always be zero. If MinLevelInMillinit == MaxLevelInMillinit, then this should be zero.

BRIGHTNESS_NIT_RANGE - NtDoc