Converting DataView object to bitmap using javascript

Question

i am trying to get image from usb biometric fingerprint reader device using webusb api. The data returned from device is a DataView() (typed array? arraybuffer?). i google it, and can not find a way to convert/extract image from this dataview object. is it black hole for javascript? I would appreciate any ideas.

logged returned data:

DataView(512)
    ArrayBuffer(512)
      [[Int8Array]]: Int8Array(512) [19, 1, …]
      [[Int16Array]]: Int16Array(256) [275, 310, …]
      [[Int32Array]]: Int32Array(128) [20316435, 22806905, …]
      [[Uint8Array]]: Uint8Array(512) [19, 1, ..]

Reilly Grant · Accepted Answer · 2019-08-26 16:58:40Z

1

The result is returned as a DataView for convenience, if you need it as an ArrayBuffer just access the buffer property. From an ArrayBuffer you can construct another kind of Typed Array or if you want to treat the data as an image turn it into a data URL for use in an tag.

answered Aug 26, 2019 at 16:58

Reilly Grant

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zippo Over a year ago

i tagged webusb for future searches. i tried data URL. i have four nested arrays, they convert only Uint8Array(). as promised, thank you :)

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