Deno Image Processor

Deno module for image processing

Features

Accepted extensions

Use

Import it

import * as dimg from 'https://deno.land/x/dimg/mod.ts'

Data Types

type Rect = {
  x: number
  y: number
  w: number
  h: number
}

type Size = {
  w: number
  h: number
}

type Res = {
  status: boolean
  err: string
  res: Uint8Array
}

You probably will never see the Res type anywhere,
It is the type that Rust returns, but in the Deno code we transform its bad result in throw new Error(res.err).

(Because of the WebAssembly the types in the pkg folder were made with classes)

Crop image

crop(img: Uint8Array, rect: Rect)

Here’s an example that we open a file and pass its data to crop.

const img = await Deno.readFile(`./image.png`)

dimg.crop(
  img,
  {
    y: 340, x: 328,
    h: 100, w: 100
  }
)

.then((res: Uint8Array) => {
  Deno.writeFile(`./res_image.png`, res)
  console.info('Done')
})
.catch((err: Error) => {
  console.error(err)
})

Resize image

crop(img: Uint8Array, deform: boolean, size: Size)

The same thing as cropping, but this time use the resize function.
And of course see the difference of the parameters type.

The deform parameter is for whether the image should be cut or deformed/redeemed depending on the dimensions.