https://github.com/cesiumlabs/bitmap

Bitmap Encoder/Decoder for Deno based on Node's bmp-js.
https://github.com/cesiumlabs/bitmap

bitmap bmp-js deno javascript

Last synced: about 2 months ago
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Bitmap Encoder/Decoder for Deno based on Node's bmp-js.

• Host: GitHub
• URL: https://github.com/cesiumlabs/bitmap
• Owner: CesiumLabs
• Created: 2021-01-29T17:21:35.000Z (over 5 years ago)
• Default Branch: main
• Last Pushed: 2021-01-30T15:44:01.000Z (over 5 years ago)
• Last Synced: 2025-08-19T15:38:59.884Z (10 months ago)
• Topics: bitmap, bmp-js, deno, javascript
• Language: TypeScript
• Homepage: https://deno.land/x/bitmap
• Size: 3.91 KB
• Stars: 2
• Watchers: 2
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

          
# Bitmap

Bitmap Encoder/Decoder for Deno based on Node's **bmp-js**.

# Example

```js

// BitmapBufferAPI = Buffer | Decoder = Bitmap Decoder | Encoder = Bitmap Encoder

import { BitmapBufferAPI, Decoder, Encoder } from "https://deno.land/x/bitmap/mod.ts";

const data = Deno.readFileSync("./image.bmp");

const decoder = Decoder(BitmapBufferAPI.from(data));

const imgData = decoder.data;

for (let i = 0; i < imgData.length; i += 4) {

    const brightness = 0.34 * imgData[i] + 0.5 * imgData[i + 1] + 0.16 * imgData[i + 2];

    imgData[i] = brightness;

    imgData[i + 1] = brightness;

    imgData[i + 2] = brightness;

}

const bitmap = Encoder({

    data: imgData,

    width: decoder.width,

    height: decoder.height

});

Deno.writeFileSync("./edited.bmp", bitmap.data);

```