Bitmap support

[kavika13]

I'd like to see bitmap support. The option I was looking at before this only supported PNGs, and this is step up.

PNG support will work for me for now, but even more flexibility would be awesome.

[mikolalysenko]

Totally agree. I started on this using the node-bitmap module, but unfortunately that package only supports a small subset of the full BMP spec. If you want to take on the project though and write a full BMP parser, then you have my blessing and encouragement.

[aneesh-neelam]

There seems to be a lack of good and independent libraries that support the BMP format in Node.js. I would like to see this project gain BMP support soon.

[benwiley4000]

The bmp-js module is actively maintained so may be a better candidate than node-bitmap for inclusion today (and its documentation is less sparse, if marginally), though it doesn't support 2-, 16- or 32-bit bitmaps. I'm not sure what spec limitations @mikolalysenko was speaking of in node-bitmap, but as the library hasn't been updated since 2013, they must still exist.

We could use a volunteer to uncover the limitations of each library and figure out if one deserves inclusion in get-pixels. A bonus would be contributing to help the library match the spec! 😄