github.com/gographics/gmagick

v1.0.0

Source

Version published: 7 years ago

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Source

Go bindings for GraphicsMagick

Install `GraphicsMagick` libraries and header files

Windows

Install msys2-x86_64
In msys2 shell:

pacman -S mingw-w64-x86_64-gcc
pacman -S mingw-w64-x86_64-zlib
pacman -S mingw-w64-x86_64-pkg-config
pacman -S mingw-w64-x86_64-graphicsmagick

Add following environment variable:

set PATH=<msys64>\mingw64\bin;%PATH%
set PKG_CONFIG_PATH=<msys64>\mingw64\lib\pkgconfig
set MAGICK_CODER_MODULE_PATH=<msys64>\mingw64\lib\GraphicsMagick-1.3.25\modules-Q8\coders

(BTW: you should change <msys64> to your installation path of msys2)

MacOS

Install GraphicsMagick using Homebrew or MacPorts
An example of MacPorts:

sudo port install graphicsmagick
export PKG_CONFIG_PATH=/opt/local/lib/pkgconfig

CentOS

ensure epel-release was installed. (help)
yum install GraphicsMagick-devel

Ubuntu

sudo apt-get install libgraphicsmagick1-dev

Install golang bindings

go get github.com/gographics/gmagick

Example

package main

import (
    "flag"
    "github.com/gographics/gmagick"
)

func resize(orig string, dest string) {
    mw := gmagick.NewMagickWand()
    defer mw.Destroy()
    mw.ReadImage(orig)
    filter := gmagick.FILTER_LANCZOS
    w := mw.GetImageWidth()
    h := mw.GetImageHeight()
    mw.ResizeImage(w/2, h/2, filter, 1)
    mw.WriteImage(dest)
}

func main() {
    f := flag.String("from", "", "original image file ...")
    t := flag.String("to", "", "target file ...")
    flag.Parse()

    gmagick.Initialize()
    defer gmagick.Terminate()

    resize(*f, *t)
}

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Last updated on 10 Jul 2017

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