https://github.com/ultimate-guitar/go-imagequant

Go bindings for libimagequant
https://github.com/ultimate-guitar/go-imagequant

bindings cgo golang image-compression image-processing libimagequant pngquant pngquant-library

Last synced: 2 months ago
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Go bindings for libimagequant

• Host: GitHub
• URL: https://github.com/ultimate-guitar/go-imagequant
• Owner: ultimate-guitar
• License: other
• Created: 2018-03-08T14:29:37.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2020-12-16T10:39:13.000Z (about 4 years ago)
• Last Synced: 2024-06-18T17:12:22.665Z (7 months ago)
• Topics: bindings, cgo, golang, image-compression, image-processing, libimagequant, pngquant, pngquant-library
• Language: C
• Size: 101 KB
• Stars: 52
• Watchers: 4
• Forks: 14
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md

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README

        
# Go-ImageQuant

[![Go Report Card](https://goreportcard.com/badge/github.com/ultimate-guitar/go-imagequant)](https://goreportcard.com/report/github.com/ultimate-guitar/go-imagequant) [![Build Status](https://travis-ci.org/ultimate-guitar/go-imagequant.svg?branch=master)](https://travis-ci.org/ultimate-guitar/go-imagequant) [![GoDoc](https://godoc.org/github.com/ultimate-guitar/go-imagequant?status.svg)](https://godoc.org/github.com/ultimate-guitar/go-imagequant)

## ABOUT

This is Go bindings for libimagequant.

Libimagequant is the backend of pngquant app. It provides a high level of png image compression.

Libimagequant is a library for lossy recompression of PNG images to reduce their filesize.  This go-imagequant project is a set of bindings for libimagequant to enable its use from the Go programming language.

This binding was written by hand. The result is somewhat more idiomatic than an automated conversion, but some  defer foo.Release() calls are required for memory management.

This project forked from [https://code.ivysaur.me/go-imagequant/](https://code.ivysaur.me/go-imagequant/) repo.

## USAGE

Usage example is provided by a sample utility cmd/gopngquant which mimics some functionality of the upstream pngquant.

The sample utility has the following options:

```

Usage of gopngquant:

  -In string

        Input filename

  -Out string

        Output filename

  -Speed int

        Speed (1 slowest, 10 fastest) (default: 3)

  -Compression int

        Compression level (DefaultCompression = 0, NoCompression = -1, BestSpeed = -2, BestCompression = -3) (default: BestCompression )

  -Version

```

## BUILDING

Install a C11 compiler and simply `go get github.com/ultimate-guitar/go-imagequant`.

## LICENSE

I am releasing this binding under the ISC license, however, libimagequant itself is released under GPLv3-or-later and/or commercial licenses. You must comply with the terms of such a license when using this binding in a Go project.

## CHANGELOG

See [CHANGELOG](CHANGELOG.md).