Class ImageEntity

constructor

• new ImageEntity(source, width?, height?, options?): ImageEntity

• 构造函数，示例如下：

  // 网络图像数据源
  const image_net:ImageEntity = new ImageEntity('https://webmap0.bdimg.com/wolfman/static/common/images/new/newlogo-new_3c175be.png');
  // rawfile图像数据源
  const image_rawfile:ImageEntity = new ImageEntity('rawfile://custom_logo.png');
  // PixelMap图像像素类,可以通过OffscreenCanvas获取
  private settings: RenderingContextSettings = new RenderingContextSettings(true)
  let offContext = this.offCanvas.getContext("2d", this.settings);
  /**** 省略画布图像操作 ****/
  let pixelmap = offContext.getPixelMap(150, 150, 130, 130);
  const image_pixelmap:ImageEntity = new ImageEntity(pixelmap, vp2px(130), vp2px(130));
  Copy

  Parameters

  • source: ImageSourceType

    图像来源 必填
  • Optional width: number | ImageOpt

    图像宽度 选填
  • Optional height: number

    图像高度 选填
  • Optional options: ImageOpt

    图像操作 选填

  Returns ImageEntity

  Since

  1.0.0

imageSource

src

• get src(): ImageSourceType

• Returns ImageSourceType

width

• get width(): number

• Returns number

height

• get height(): number

• Returns number

getPixesArrayBufferSync

• getPixesArrayBufferSync(): Promise<any>

• PixesArrayBuffer获取（Sync版本）

  Returns Promise<any>

getPixesMapSync

• getPixesMapSync(): Promise<any>

• 获取图像像素对象（Sync版本）

  Returns Promise<any>

  Promise<image.PixelMap | void>

  Since

  1.0.0

getPixesMap

• getPixesMap(callback): void

• 获取图像像素对象

  Parameters

  • callback: Callback<PixelMap>

    回调函数，返回PixelMap

  Returns void

  Since

  1.0.0

getArrayBufferSync

• getArrayBufferSync(): Promise<void | ArrayBuffer>

• 获取图像ArrayBuffer数据（Sync版本）

  Returns Promise<void | ArrayBuffer>

  Promise<ArrayBuffer | void>

  Since

  1.1.0

getArrayBuffer

• getArrayBuffer(callback?): void

• 获取图像像素对象，会生成内部缓存

  Parameters

  • Optional callback: Callback<ArrayBuffer>

    [可选]回调函数，返回ArrayBuffer

  Returns void

  Since

  1.1.0

getBitmap

• getBitmap(): Maybe<default>

• Returns Maybe<default>

toString

• toString(): string

• Returns string

  Since

  1.0.1

destroy

• destroy(deep?): void

• Parameters

  • Optional deep: boolean

  Returns void