IOCTL_LAMP_GET_INTENSITY_WHITE IOCTL (lamp.h)
The IOCTL_LAMP_GET_INTENSITY_WHITE control code queries the light intensity when the lamp is configured to emit white light.
#define IOCTL_LAMP_GET_INTENSITY_WHITE \
CTL_CODE(IOCTL_LAMP_BASE, 0x0004, METHOD_BUFFERED, FILE_ANY_ACCESS)
Major code
Input buffer
Irp->AssociatedIrp.SystemBuffer points to a LAMP_INTENSITY_WHITE structure.
Input buffer length
Length of a LAMP_INTENSITY_WHITE structure.
Output buffer
Irp->AssociatedIrp.SystemBuffer is filled with the light intensity information.
Output buffer length
IO_STACK_LOCATION.Parameters.DeviceIoControl.OutputBufferLength is the length of the buffer in bytes, passed in the Irp->AssociatedIrp.SystemBuffer field.
Status block
The driver sets Irp->IoStatus.Status to STATUS_SUCCESS or the appropriate error status.
If the device has been acquired by a camera driver, the lamp driver should return a STATUS_RESOURCE_IN_USE error via Irp->IoStatus.Status.
Remarks
The payload type of this IOCTL is a LAMP_INTENSITY_WHITE structure.
The Value field is the white light intensity in percentage (0 - 100).
Requirements
| Requirement | Value |
|---|---|
| Header | lamp.h |