hi_mpi_rgn_update_canvas

Applicability

Function Description

Updates the canvas of a region.

This API is not supported in the Ascend EP form of Atlas 200I/500 A2 inference product .

Prototype

hi_s32 hi_mpi_rgn_update_canvas(hi_rgn_handle handle)

Parameters

Returns

• 0: success.
• Other values: failure. For details, see 19.18.5-Region Management Return Codes.

Restrictions

• The regions must be created before you call this API.
• This API is used together with hi_mpi_rgn_get_canvas_info. It is used to switch the canvas display after the canvas memory data is updated.
• Obtain canvas information each time before calling this API.
• This API supports only OVERLAYEX regions.

See Also

For details about the API call sequence, see Video Decoding, Processing, and Display (NVR Scenario).