FBIOGET_SCREEN_ORIGIN_HIFB

Product	Supported
Atlas 350 Accelerator Card	☓
Atlas A3 training product/Atlas A3 inference product	☓
Atlas A2 training product/Atlas A2 inference product	☓
Atlas 200I/500 A2 inference product	√
Atlas inference product	☓
Atlas training product	☓

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

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

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 Framebuffer 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.

Parameter

Input/Output

Description

Input

File descriptor of an FB device.

When open("/dev/fbx") is called in the application, the file descriptor of the Framebuffer 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.

Before using the HiFB APIs, you need to call hi_mpi_vo_enable to enable the VO device.

Parent topic: HiFB for Managing Overlaid Graphics Layers