Documentation

FBIOGET_SCREEN_ORIGIN_HIFB

The Atlas 200/300/500 Inference Product does not support this API.

The Atlas Training Series Product does not support this API.

Description

Obtains the coordinates of the start point of an overlaid layer displayed on the screen.

Restrictions

  • Before using the HiFB API, you need to call hi_mpi_vo_enable to enable the VO device.
  • This API does not support multiple processes or multiple threads.

Prototype

int ioctl (int fd, FBIOGET_SCREEN_ORIGIN_HIFB, hi_fb_point *point)

Parameters

Parameter

Input/Output

Description

fd

Input

File descriptor of an FB device.

When open("/dev/fbx") is called in the application, the file descriptor of the FB device corresponding to the current VO device is returned.

FBIOGET_SCREEN_ORIGIN_HIFB

Input

ioctl number.

point

Output

Pointer to the coordinate structure of the start point.

Returns

  • 0: success
  • Other values: failure