https://github.com/fakoua/jpeg.ts

A pure TypeScript JPEG encoder and decoder for deno
https://github.com/fakoua/jpeg.ts

decoding deno encoding image jpeg

Last synced: 1 day ago
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A pure TypeScript JPEG encoder and decoder for deno

• Host: GitHub
• URL: https://github.com/fakoua/jpeg.ts
• Owner: fakoua
• License: mit
• Created: 2020-01-11T21:18:41.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-09-16T15:54:29.000Z (about 4 years ago)
• Last Synced: 2024-09-10T01:49:37.258Z (24 days ago)
• Topics: decoding, deno, encoding, image, jpeg
• Language: TypeScript
• Size: 148 KB
• Stars: 12
• Watchers: 1
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# jpeg.ts

A pure TypeScript JPEG encoder and decoder for deno

![GitHub code size in bytes](https://img.shields.io/github/languages/code-size/fakoua/jpeg.ts?style=for-the-badge)

![GitHub](https://img.shields.io/github/license/fakoua/jpeg.ts?style=for-the-badge)

![GitHub last commit](https://img.shields.io/github/last-commit/fakoua/jpeg.ts?style=for-the-badge)

![GitHub Workflow Status](https://img.shields.io/github/workflow/status/fakoua/jpeg.ts/Deno%20CI?style=for-the-badge)

## decoder

```ts

import { decode } from "https://deno.land/x/jpeg.ts/mod.ts"

//read image data:

let raw = await Deno.readFile(fullPath)

//decode"

let result = decode(raw);

//result.width: Image width

//result.height: Image height

//result.data[0] -> Red

//result.data[1] -> Green

//result.data[2] -> Blue

//result.data[3] -> Alpha

//...

// result.data is an array of RGBa colors

```

Also you can access the pixel of the image:

```ts

import { decode } from "https://deno.land/x/jpeg.ts/mod.ts"

//read image data:

let raw = await Deno.readFile(fullPath)

//decode"

let result = decode(raw);

let pix = result.getPixel(12, 33); // -> { r: 0, g: 0, b: 254, a: 255 }

// result.getPixel(x, y)

//while  0 <= x < result.width   and    0 <= y < result.height

```

## encoder

```ts

import { encode, Image } from "https://deno.land/x/jpeg.ts/mod.ts"

// make image with red gree blue and alpha colors

let image: Image = {

    width: 2,

    height: 2,

    data: new Uint8Array( [

        255,0,0,1,

        0,255,0,1,

        0,0,255,1,

        255,255,0,1,

    ])

}

let raw = encode(image, 100); //Quality 100 (default is 50)

//save the image

await Deno.writeFile('rgb.jpg', raw.data);

```