png-glass v0.0.3

PNG Glass

A PNG transparency optimizer

Installation

Install it with npm

npm install png-glass

or with yarn

yarn add png-glass

Usage

pngGlass({in: 'in.png', out: 'out.png' })

Options

in

The input file.

• Default: in.png
• Type: Readable stream, Buffer, Path, String

out

The output file.

• Default: out.png
• Type: Writable stream, Path, String

optipng

Should ompress the image with optipng.

• Default: true
• Type: boolean

Why

alphaPNG images works by adding a transparency layer in the top of the original png image.

In such images, some parts could be completely transparent and the original image colors will not be visible to the user.

But unfortunately, the PNG compression won't be able to optimize that behavior.

PNG Glass cleans your PNG by converting every 100% transparent pixel to a unique color, which helps the PNG algorithm to compress better the file.