gosexy/canvas is an image processing library based on ImageMagick's MagickWand, for the Go programming language.

This branch is compatible with ImageMagick 6.6.x, like the one included with Debian Squeeze.

Please check the master branch for ImageMagick 6.7.x.

Get the MagickWand development package

$ sudo aptitude install libmagickwand-dev

$ cd $GOPATH
$ mkdir -p github.com/gosexy
$ cd github.com/gosexy
$ git clone -b squeeze git://github.com/gosexy/canvas
$ go install github.com/gosexy/canvas

package main

import "github.com/gosexy/canvas"

func main() {
  cv := canvas.New()
  defer cv.Destroy()

  // Opening some image from disk.
  opened := cv.Open("examples/input/example.png")

  if opened {

    // Photo auto orientation based on EXIF tags.
    cv.AutoOrientate()

    // Creating a squared thumbnail
    cv.Thumbnail(100, 100)

    // Saving the thumbnail to disk.
    cv.Write("examples/output/example-thumbnail.png")

  }
}

=======

The ImageMagick's header files are required. If you're using brew the installation is straightforward.

$ brew install imagemagick

Debian has an old version of MagickWand (6.6.x), this binding was built against 6.7.x. Please check out the squeeze branch to get a version that works on Debian Squeeze and probably other debian-based distros. This may not be required for Ubuntu.

Arch Linux already has a recent version of MagickWand.

$ sudo pacman -S extra/imagemagick

Please, follow the install from source tutorial.

After installing ImageMagick's header files, pull gocanvas from github:

$ go get github.com/gosexy/canvas

After installing, you can use go get -u github.com/gosexy/canvas to keep up to date.

package main

import "github.com/gosexy/canvas"

func main() {
  cv := canvas.New()
  defer cv.Destroy()

  // Opening some image from disk.
  opened := cv.Open("examples/input/example.png")

  if opened {

    // Photo auto orientation based on EXIF tags.
    cv.AutoOrientate()

    // Creating a squared thumbnail
    cv.Thumbnail(100, 100)

    // Saving the thumbnail to disk.
    cv.Write("examples/output/example-thumbnail.png")

  }
}

$ go doc github.com/gosexy/canvas

Or you can browse it online.