to-ico

Convert PNG to ICO in memory

Install

$ npm install --save to-ico

Usage

const fs = require('fs');
const toIco = require('to-ico');
 
const files = [
    fs.readFileSync('unicorn-16x16.png'),
    fs.readFileSync('unicorn-32x32.png')
];
 
toIco(files).then(buf => {
    fs.writeFileSync('favicon.ico', buf);
});

API

toIco(input, [options])

input

Type: Array string

Array of PNG image buffers.

The images must have a size of 16x16, 24x24, 32x32, 48x48, 64x64, 128x128 or 256x256 and they must have an 8 bit per sample (channel) bit-depth (on Unix you can check this with the file command: RGB(A) is supported, while colormap is not, because it's 8 bits per pixel instead of 8 bits per channel, which is 24 or 32 bits per pixel depending on the presence of the alpha channel). These are limitations in the underlying pngjs library. If you have a colormap PNG you can convert it to an RGB/RGBA PNG with commonly used image editing tools.

options

resize

Type: boolean
Default: false

Use the largest image and resize to sizes defined using the sizes option.

sizes

Type: Array
Default: [16, 24, 32, 48, 64, 128, 256]

Array of sizes to use when resizing.

Related

• to-ico-cli - CLI for this module

License

MIT © Kevin Martensson