WebVisionTask<R> class final

One official browser task on its own worker, with requests serialized.

Implemented types

• VisionTaskBackend<R>
• VisionTaskOverlayBackend

Properties

hashCode → int

The hash code for this object.

no setter, inherited

overlayActive → bool

False when canvas transfer is unsupported or worker drawing failed.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

attachOverlay(Object canvas) → Future<void>

Transfers a browser canvas to the task's worker for drawing.

override

detachOverlay() → Future<void>

Stops drawing; the transferred canvas stays blank afterwards.

override

detect(VisionImage image, int rotationDegrees, int? timestampMilliseconds, {VisionRegionOfInterest? regionOfInterest}) → Future<R>

Completes with copied results; requests and disposal keep their submission order. Only the tasks that accept a region of interest receive regionOfInterest. A browser frame arrives as image.browserFrame, which the backend releases after inference.

override

dispose() → Future<void>

Finishes queued requests and releases the SDK task on its own thread.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

setOverlayOptions({required bool connections, required bool points, required bool mirrored, required double scale}) → void

Chooses what the worker draws and how the preview is transformed.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

create<R>(String task, TaskOptions options, RunningMode runningMode, Map<String, Object?> settings, R decode(Map<String, dynamic> json, Float64List? landmarks)) → Future<WebVisionTask<R>>

Creates one official browser task from options in runningMode; settings are the task's own options, named as in Google's JavaScript API, and decode reads each result.