Class DataTransform

数据类型转换 TypeArray、ArrayBuffer、Blob、File、DataURL、canvas的相互转换

See

http://blog.csdn.net/yinwhm12/article/details/73482904

Hierarchy

DataTransform

Constructors

constructor

new DataTransform(): DataTransform
Returns DataTransform

Methods

arrayBufferToBlob

arrayBufferToBlob(arrayBuffer: ArrayBuffer): Blob
ArrayBuffer to Blob
Parameters
- arrayBuffer: ArrayBuffer
Returns Blob
- Defined in src/polyfill/DataTransform.ts:29

arrayBufferToDataURL

arrayBufferToDataURL(arrayBuffer: ArrayBuffer): Promise<string>
Parameters
- arrayBuffer: ArrayBuffer
Returns Promise<string>
- Defined in src/polyfill/DataTransform.ts:149

arrayBufferToImage

arrayBufferToImage(arrayBuffer: ArrayBuffer): Promise<HTMLImageElement>
Parameters
- arrayBuffer: ArrayBuffer
Returns Promise<HTMLImageElement>
- Defined in src/polyfill/DataTransform.ts:233

arrayBufferToObject

arrayBufferToObject(arrayBuffer: ArrayBuffer): Promise<any>
ArrayBuffer 转换为对象
Parameters
- arrayBuffer: ArrayBuffer
Returns Promise<any>
- Defined in src/polyfill/DataTransform.ts:282

arrayBufferToString

arrayBufferToString(arrayBuffer: ArrayBuffer): Promise<string>
Parameters
- arrayBuffer: ArrayBuffer
Returns Promise<string>
- Defined in src/polyfill/DataTransform.ts:269

arrayBufferToUint8

arrayBufferToUint8(arrayBuffer: ArrayBuffer): Uint8Array
ArrayBuffer to Uint8 Uint8数组可以直观的看到ArrayBuffer中每个字节（1字节 === 8位）的值。一般我们要将ArrayBuffer转成Uint类型数组后才能对其中的字节进行存取操作。
Parameters
- arrayBuffer: ArrayBuffer
Returns Uint8Array
- Defined in src/polyfill/DataTransform.ts:40

arrayToArrayBuffer

arrayToArrayBuffer(array: number[]): ArrayBuffer
Array to ArrayBuffer
Parameters
- array: number[]
  
  例如：[0x15, 0xFF, 0x01, 0x00, 0x34, 0xAB, 0x11];
Returns ArrayBuffer
- Defined in src/polyfill/DataTransform.ts:62

blobToArrayBuffer

blobToArrayBuffer(blob: Blob): Promise<ArrayBuffer>
Blob to ArrayBuffer
Parameters
- blob: Blob
Returns Promise<ArrayBuffer>
- Defined in src/polyfill/DataTransform.ts:11

blobToDataURL

blobToDataURL(blob: Blob): Promise<string>
File、Blob对象转换为dataURL File对象也是一个Blob对象，二者的处理相同。
Parameters
- blob: Blob
Returns Promise<string>
- Defined in src/polyfill/DataTransform.ts:109

blobToText

blobToText(blob: Blob): Promise<string>
Parameters
- blob: Blob
Returns Promise<string>
- Defined in src/polyfill/DataTransform.ts:249

canvasToDataURL

canvasToDataURL(canvas: HTMLCanvasElement, type?: "png" | "jpeg", quality?: number): string
canvas转换为dataURL
Parameters
- canvas: HTMLCanvasElement
- type: "png" | "jpeg" = 'png'
- quality: number = 1
Returns string
- Defined in src/polyfill/DataTransform.ts:87

canvasToImage

canvasToImage(canvas: HTMLCanvasElement, type?: "png" | "jpeg", quality?: number): Promise<HTMLImageElement>
canvas转换为图片
Parameters
- canvas: HTMLCanvasElement
- type: "png" | "jpeg" = 'png'
- quality: number = 1
Returns Promise<HTMLImageElement>
- Defined in src/polyfill/DataTransform.ts:97

dataURLToArrayBuffer

dataURLToArrayBuffer(dataurl: string): Promise<ArrayBuffer>
Parameters
- dataurl: string
Returns Promise<ArrayBuffer>
- Defined in src/polyfill/DataTransform.ts:141

dataURLToImage

dataURLToImage(dataurl: string): Promise<HTMLImageElement>
Parameters
- dataurl: string
Returns Promise<HTMLImageElement>
- Defined in src/polyfill/DataTransform.ts:157

dataURLtoBlob

dataURLtoBlob(dataurl: string): Blob
dataURL转换为Blob对象
Parameters
- dataurl: string
Returns Blob
- Defined in src/polyfill/DataTransform.ts:127

imageDataToCanvas

imageDataToCanvas(imageData: ImageData): HTMLCanvasElement
Parameters
- imageData: ImageData
Returns HTMLCanvasElement
- Defined in src/polyfill/DataTransform.ts:214

imageDataToDataURL

imageDataToDataURL(imageData: ImageData, quality?: number): string
Parameters
- imageData: ImageData
- quality: number = 1
Returns string
- Defined in src/polyfill/DataTransform.ts:206

imageToArrayBuffer

imageToArrayBuffer(img: HTMLImageElement): Promise<ArrayBuffer>
Parameters
- img: HTMLImageElement
Returns Promise<ArrayBuffer>
- Defined in src/polyfill/DataTransform.ts:191

imageToCanvas

imageToCanvas(img: HTMLImageElement): HTMLCanvasElement
Parameters
- img: HTMLImageElement
Returns HTMLCanvasElement
- Defined in src/polyfill/DataTransform.ts:180

imageToDataURL

imageToDataURL(img: HTMLImageElement, quality?: number): string
Parameters
- img: HTMLImageElement
- quality: number = 1
Returns string
- Defined in src/polyfill/DataTransform.ts:172

imagedataToImage

imagedataToImage(imageData: ImageData, quality?: number): Promise<HTMLImageElement>
Parameters
- imageData: ImageData
- quality: number = 1
Returns Promise<HTMLImageElement>
- Defined in src/polyfill/DataTransform.ts:225

stringToArrayBuffer

stringToArrayBuffer(str: string): ArrayBuffer
Parameters
- str: string
Returns ArrayBuffer
- Defined in src/polyfill/DataTransform.ts:261

stringToUint8Array

stringToUint8Array(str: string): Uint8Array
Parameters
- str: string
Returns Uint8Array
- Defined in src/polyfill/DataTransform.ts:290

uint8ArrayToArray

uint8ArrayToArray(u8a: Uint8Array): number[]
TypeArray to Array
Parameters
- u8a: Uint8Array
Returns number[]
- Defined in src/polyfill/DataTransform.ts:73

uint8ArrayToString

uint8ArrayToString(arr: Uint8Array): string
Parameters
- arr: Uint8Array
Returns string
- Defined in src/polyfill/DataTransform.ts:301

uint8ToArrayBuffer

uint8ToArrayBuffer(uint8Array: Uint8Array): ArrayBuffer
Uint8 to ArrayBuffer 我们Uint8数组可以直观的看到ArrayBuffer中每个字节（1字节 === 8位）的值。一般我们要将ArrayBuffer转成Uint类型数组后才能对其中的字节进行存取操作。
Parameters
- uint8Array: Uint8Array
Returns ArrayBuffer
- Defined in src/polyfill/DataTransform.ts:51

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