FBIOGET_VSCREENINFO

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

The Atlas Training Series Product does not support this API.

Obtains the variable information about the Framebuffer screen, including the resolution and pixel format.

The default resolution of the HD graphics layer is 1920 x 1080, the default resolution of the cursor layer is 256 x 256, the default resolution of the SD graphics layer is 720 x 576, and the default pixel format is ARGB8888.
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.

int ioctl (int fd, FBIOGET_VSCREENINFO, fb_var_screeninfo *var)

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_VSCREENINFO	Input	ioctl number.
var	Output	Pointer to the variable information structure.

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 FB device corresponding to the current VO device is returned.

FBIOGET_VSCREENINFO

Input

ioctl number.

var

Output

Pointer to the variable information structure.

0: success
Other values: failure. The native error code of the Linux kernel is returned. For details, click here.

Parent topic: HiFB for Managing Overlaid Graphics Layers