// portabledevice.h

typedef enum tagWPD_EXPOSURE_METERING_MODES {
  WPD_EXPOSURE_METERING_MODE_UNDEFINED,
  WPD_EXPOSURE_METERING_MODE_AVERAGE,
  WPD_EXPOSURE_METERING_MODE_CENTER_WEIGHTED_AVERAGE,
  WPD_EXPOSURE_METERING_MODE_MULTI_SPOT,
  WPD_EXPOSURE_METERING_MODE_CENTER_SPOT
} WPD_EXPOSURE_METERING_MODES;
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Windows Driver Kit DDI reference (ne-portabledevice-tagwpd_exposure_metering_modes)

tagWPD_EXPOSURE_METERING_MODES enumeration

Description

The WPD_EXPOSURE_METERING_MODES enumeration type describes the metering mode to use when estimating exposure for still image capture by a device.

Constants

`WPD_EXPOSURE_METERING_MODE_UNDEFINED`

The metering mode is undefined.

`WPD_EXPOSURE_METERING_MODE_AVERAGE`

Use averaged exposure across the full image.

`WPD_EXPOSURE_METERING_MODE_CENTER_WEIGHTED_AVERAGE`

Use an averaged exposure, with the center of the image given more weight.

`WPD_EXPOSURE_METERING_MODE_MULTI_SPOT`

Use a multi-spot averaging technique.

`WPD_EXPOSURE_METERING_MODE_CENTER_SPOT`

Use a center-spot averaging technique.

Remarks

Indicates the metering mode of the device. This enumeration is used by the WPD_STILL_IMAGE_EXPOSURE_METERING_MODE property.

WPD_EXPOSURE_METERING_MODES - NtDoc