54 lines
2.1 KiB
Plaintext
54 lines
2.1 KiB
Plaintext
Go bindings for libimagequant
|
|
|
|
`libimagequant` is a library for lossy recompression of PNG images to reduce their filesize. It is used by the `pngquant` tool. 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.
|
|
|
|
Written in Golang
|
|
|
|
=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)
|
|
-Version`
|
|
|
|
=BUILDING=
|
|
|
|
This package can be installed via go get: `go get code.ivysaur.me/imagequant`
|
|
[go-get]code.ivysaur.me/imagequant git https://git.ivysaur.me/code.ivysaur.me/imagequant.git[/go-get]
|
|
|
|
The expected package path is `code.ivysaur.me/imagequant`. Build via `go build`.
|
|
|
|
This is a CGO package and requires a C compiler installed. However, if you use `go install` then future invocations of `go build` do not require the C compiler to be present.
|
|
|
|
The `imagequant.go` file also declares a number of `CFLAGS` for GCC that allow the included libimagequant (2.8 git-a425e83) to build in an optimal way without using the upstream configure/make scripts.
|
|
|
|
=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=
|
|
|
|
2017-03-03 2.9go1.1
|
|
- go-imagequant: Update bundled libimagequant from 2.8.0 to 2.9.0
|
|
- go-imagequant: Separate `CGO_LDFLAGS` for Linux and Windows targets
|
|
- gopngquant: Fix an issue with non-square images
|
|
|
|
2016-11-24 2.8go1.0
|
|
- Initial public release
|
|
|
|
=SEE ALSO=
|
|
|
|
- Pngquant homepage https://pngquant.org/
|
|
- Pngquant source code https://github.com/pornel/pngquant
|
|
- Libimagequant source code https://github.com/ImageOptim/libimagequant
|