Class (SamplingOptions)

Implements sampling options.

NOTE

The initial APIs of this module are supported since API version 11. Newly added APIs will be marked with a superscript to indicate their earliest API version.

The initial APIs of this class are supported since API version 12.

This module uses the physical pixel unit, px.

This module operates under a single-threaded model. The caller needs to manage thread safety and context state transitions.

Modules to Import

import { drawing } from '@kit.ArkGraphics2D';

constructor¹²⁺

constructor()

Creates a SamplingOptions object, where the default value of FilterMode is FILTER_MODE_NEAREST.

System capability: SystemCapability.Graphics.Drawing

Example

import { RenderNode } from '@kit.ArkUI';
import { common2D, drawing } from '@kit.ArkGraphics2D';

class DrawingRenderNode extends RenderNode {
  draw(context : DrawContext) {
    const canvas = context.canvas;
    const pen = new drawing.Pen();
    let samplingOptions = new drawing.SamplingOptions();
  }
}

constructor¹²⁺

constructor(filterMode: FilterMode)

Creates a SamplingOptions object.

System capability: SystemCapability.Graphics.Drawing

Parameters

Name	Type	Mandatory	Description
filterMode	FilterMode	Yes	Filter mode.

Error codes

For details about the error codes, see Universal Error Codes.

ID	Error Message
401	Parameter error.Possible causes:1.Mandatory parameters are left unspecified;2.Incorrect parameter types.

Example

import { RenderNode } from '@kit.ArkUI';
import { common2D, drawing } from '@kit.ArkGraphics2D';

class DrawingRenderNode extends RenderNode {
  draw(context : DrawContext) {
    const canvas = context.canvas;
    let samplingOptions = new drawing.SamplingOptions(drawing.FilterMode.FILTER_MODE_NEAREST);
  }
}