golibvips

Golibvips is golang libvips wrapper for windows

Golibvips is alternative libvips wrapper that work with windows by using vips Windows binary

Installation

Step 1 : Download Vips windows binary

Download vips windows binary from here vips-dev-w64-all-8.13.3.zip

Step 2 : Setting Environtment Variable

extract vips-dev-w64-all-8.13.3.zip to folder, for example C:\vips-dev-8.13 windows search Edit the system environtment variable > Environtment Variables > Path > edit > new > type C:\vips-dev-8.13\bin.

Step 3 : Install Golibvips golang package

go get -u github.com/twincats/golibvips/libvips 

Example usage

import (
	"fmt"
	"io/ioutil"
	"os"

	"github.com/twincats/golibvips/libvips"
)

func checkError(err error) {
	if err != nil {
		fmt.Println("error:", err)
		os.Exit(1)
	}
}

func main() {
	// starting library
	libvips.Startup(nil)
	defer libvips.Shutdown()

	// load image from file
	image1, err := libvips.NewImageFromFile("input.png")
	checkError(err)

	// resize by with pixel, keep aspect ratio
	err = image1.ResizeWidthPixel(1000, libvips.KernelAuto)
	checkError(err)

	// create web export param to export webp
	ep := libvips.NewWebpExportParams()
	ep.Quality = 60

	// export to webp
	image1bytes, _, err := image1.ExportWebp(ep)
	checkError(err)

	// save to file
	err = ioutil.WriteFile("output.webp", image1bytes, 0644)
	checkError(err)
}

Note

Golibvips is build from govips without to build libvips directly. Some feature is disabled because windows binary not supported by default heif and avif format because its depend on hevc. if need to use that format build vips directly from https://github.com/libvips/build-win64-mxe with ./build.sh all --with-hevc . and try enable some commented feature.

test resource is not included in repository, you cant download from govips repository, or use your own.