EvanPictureService¶

Source	picture

Picture taking service for HTML 5 / IOS / Android.

takeSnapshot¶

pictureService.takeSnapshot(arguments);

Takes an img. On Desktop the webcam will be used. On mobile IOS / Android internals will be used to access native cameras.

Returns¶

Promise returns any: the img data

{
  name: 'capture.png',
  fileType: 'image/png',
  file: arrayBuffer,
  blobURI: this._DomSanitizer.bypassSecurityTrustUrl(dataUri)
}

Example¶

const picture = await this.pictureService.takeSnapshot();

getBlobUri¶

pictureService.getBlobUri(dataUrl);

Transform a blob uri from an dataUrl

Parameters¶

dataUrl - string: data url that should be transformed

Returns¶

Promise returns string: blob uri

Example¶

pictureService.getBlobUri('blob:https://dashboard.test.evan.network/74334fca-0cc3-46d5-9804-2a7161005fe1')

dataURItoBlob¶

pictureService.dataURItoBlob(dataURI);

Transform a data uri in to an blob.

Parameters¶

dataURI - string: The options used for calling

Returns¶

Promise returns any: transformed blob

Example¶

const buffer = await pictureService.dataURItoBlob('blob:https://dashboard.test.evan.network/74334fca-0cc3-46d5-9804-2a7161005fe1');

blobToDataURI¶

pictureService.blobToDataURI(blob);

Transforms an blob into an data uri.

Parameters¶

blob - Blob: The options used for calling

Returns¶

Promise returns void: transformed data uri

Example¶

if (dataUri === pictureService.blobToDataURI(pictureService.dataURItoBlob('blob:https://dashboard.test.evan.network/74334fca-0cc3-46d5-9804-2a7161005fe1')) {
  console.log('same result')
}

blobToArrayBuffer¶

pictureService.blobToArrayBuffer(blob);

Transforms an blob into an array buffer.

Parameters¶

blob - any: blob to transform

Returns¶

Promise returns any: transformed array buffer

Example¶

pictureService.blobToArrayBuffer(blob);

resizeImage¶

pictureService.resizeImage(dataUri, dimensions);

Takes an dataUri and resizes the img to an maximum px ratio of 1000px:1000px.

Parameters¶

dataUri - string: Data Uri
dimensions - any: dimensions to transform the picture to (default max_width: 1000, max_height: 1000)

Returns¶

Promise returns void: Returns the resized img as a blob.

Example¶

await pictureService.resizeImage('blob:https://dashboard.test.evan.network/74334fca-0cc3-46d5-9804-2a7161005fe1');