hi_mpi_rgn_update_canvas

Applicable Products

Function

Updates the canvas of a region.

The Ascend EP form of Atlas 200I/500 A2 inference products does not support this API.

Prototype

hi_s32 hi_mpi_rgn_update_canvas(hi_rgn_handle handle)

Parameters

Returns

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

Restrictions

• The regions must have been created before you call this API.
• This API works with hi_mpi_rgn_get_canvas_info. It is used to switch the canvas display after the canvas memory data is updated.
• Canvas information must be obtained each time before this API is called.
• This API supports only OVERLAYEX regions.

Reference

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