imagemin-giflossy

giflossy imagemin plugin

Install

$ npm install --save imagemin-giflossy

Usage

const imagemin = require('imagemin');
const imageminGiflossy = require('imagemin-giflossy');
 
imagemin(['images/*.gif'], 'build/images', {use: [imageminGiflossy({lossy: 80})]}).then(() => {
    console.log('Images optimized');
});

API

imageminGiflossy([options])(buffer)

Returns a promise for a buffer.

options

interlaced

Type: boolean
Default: false

Interlace gif for progressive rendering.

optimizationLevel

Type: number
Default: 1

Select an optimization level between 1 and 3.

The optimization level determines how much optimization is done; higher levels take longer, but may have better results.

1. Stores only the changed portion of each image.
2. Also uses transparency to shrink the file further.
3. Try several optimization methods (usually slower, sometimes better results)

colors

Type: number

Reduce the number of distinct colors in each output GIF to num or less. Num must be between 2 and 256.

lossy

Type: Number
Default: undefined

Order pixel patterns to create smaller GIFs at cost of artifacts and noise.

Adjust lossy argument to quality you want (30 is very light compression, 200 is heavy).

It works best when only little loss is introduced, and due to limitation of the compression algorithm very high loss levels won't give as much gain.

e.g.:

imageminGiflossy({ lossy: 80 });

resize

Type: string
Default: undefined

Resize the output GIF to widthxheight.

e.g.:

imageminGiflossy({ resize: '300x200' });

noLogicalScreen

Type: boolean
Default: false

Sets the output logical screen to the size of the largest output frame.

e.g.:

imageminGiflossy({ noLogicalScreen: true });

resizeMethod

Type: string
Default: mix

Set the method used to resize images.

e.g.:

imageminGiflossy({ resizeMethod: 'sample' });

colorMethod

Type: string
Default: diversity

Determine how a smaller colormap is chosen.

e.g.:

imageminGiflossy({ colorMethod: 'blend-diversity' });

optimize

Type: string
Default: 1

Optimize output GIF animations for space.

There are currently three levels:

• 1: Stores only the changed portion of each image. This is the default.
• 2: Also uses transparency to shrink the file further.
• 3: Try several optimization methods (usually slower, sometimes better results).

Other optimization flags provide finer-grained control.

• keep-empty: Preserve empty transparent frames (they are dropped by default).

e.g.:

imageminGiflossy({ optimize: '3' });

unoptimize

Type: boolean
Default: false

Unoptimize GIF animations into an easy-to-edit form.

e.g.:

imageminGiflossy({ unoptimize: true });

buffer

Type: buffer

Buffer to optimize.

License

MIT © imagemin