# @correctness/image-interpolation-check

在使用Image组件interpolation接口时，建议不要使用最邻近插值，避免出现明显锯齿问题。

#### 规则配置

```
// code-linter.json5
{
  "rules": {
    "@correctness/image-interpolation-check": "warn"
  }
}
```

#### 选项

该规则无需配置额外选项。

#### 正例

```
const ADAPTIVE_SCALE = 1.5;

@Component
export struct AppIcon {
  @State icon: string | PixelMap = '';
  @Prop iconSize: number = 1;
  private mInterpolation: ImageInterpolation = ImageInterpolation.None;

  aboutToAppear(): void {
    this.mInterpolation = ImageInterpolation.Medium;
  }

  @Builder
  overlayIcon() {
    Image(this.icon)
      .height(this.iconSize * ADAPTIVE_SCALE)
      .width(this.iconSize * ADAPTIVE_SCALE)
      .interpolation(ImageInterpolation.Medium)
  }

  @Builder
  overlayIcon1() {
    Image(this.icon)
      .height(this.iconSize * ADAPTIVE_SCALE)
      .width(this.iconSize * ADAPTIVE_SCALE)
      .interpolation(this.mInterpolation)
  }

  build() {
    Column() {
      this.overlayIcon();
      this.overlayIcon1();
      Image($r('app.media.pause'))
        .draggable(false)
        .interpolation(ImageInterpolation.Medium)
    }
  }
}
```

#### 反例

```
const ADAPTIVE_SCALE = 1.5;

@Component
export struct AppIcon {
  @State icon: string | PixelMap = '';
  @Prop iconSize: number = 1;
  private mInterpolation: ImageInterpolation = ImageInterpolation.Medium;

  aboutToAppear(): void {
    this.mInterpolation = ImageInterpolation.None;
  }

  @Builder
  overlayIcon() {
    Image(this.icon)
      .height(this.iconSize * ADAPTIVE_SCALE)
      .width(this.iconSize * ADAPTIVE_SCALE)
      // warning
      .interpolation(ImageInterpolation.None)
  }

  @Builder
  overlayIcon1() {
    Image(this.icon)
      .height(this.iconSize * ADAPTIVE_SCALE)
      .width(this.iconSize * ADAPTIVE_SCALE)
      // warning
      .interpolation(this.mInterpolation)
  }

  build() {
    Column() {
      this.overlayIcon();
      this.overlayIcon1();
      Image($r('app.media.pause'))
        .draggable(false)
        // warning
        .interpolation(ImageInterpolation.None)
    }
  }
}
```

#### 规则集

```
plugin:@correctness/all
```

Code Linter代码检查规则的配置指导请参考Code Linter代码检查。