Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

Awesome Lists | Featured Topics | Projects

https://github.com/rmagick/rmagick

Ruby bindings for ImageMagick
https://github.com/rmagick/rmagick

imagemagick rmagick ruby

Last synced: 4 days ago
JSON representation

Ruby bindings for ImageMagick

Awesome Lists containing this project

README 

        
RMagick

=======



[![GemVersion](https://img.shields.io/gem/v/rmagick.svg?style=flat)](https://rubygems.org/gems/rmagick)

![CI](https://github.com/rmagick/rmagick/workflows/CI/badge.svg)



Table of Contents

-----------------



-   [Introduction](#introduction)

-   [Prerequisites](#prerequisites)

-   [Installing RMagick](#installing-rmagick)

-   [Using RMagick](#using-rmagick)

-   [Things that can go wrong](#things-that-can-go-wrong)

-   [Upgrading](#upgrading)

-   [More samples](#more-samples)

-   [Reporting Bugs](#reporting-bugs)

-   [Development Setup](#development-setup)

-   [Credits](#credits)

-   [License](#mit-license)

-   [Releasing](#releasing)



Introduction

------------



RMagick is an interface between the Ruby programming language and the

ImageMagick image processing library.



Prerequisites

-------------



These prerequisites are required for the latest version of RMagick.



**OS**

- Linux

- \*BSD

- macOS

- Windows

- Other \*nix-like systems



**C++ compiler**

- RMagick 5.4.0 or later requires a C++ compiler.



**Ruby**

- Version 3.0 or later.



You can get Ruby from .



Ruby must be able to build C-Extensions (e.g. MRI, Rubinius, not JRuby)



**ImageMagick**

- Version 6.8.9 or later (6.x.x).

- Version 7.0.8 or later (7.x.x). Require RMagick 4.1.0 or later.



You can get ImageMagick from .



### Linux

#### Ubuntu

On Ubuntu, you can run:



```sh

sudo apt-get install libmagickwand-dev

```



#### Centos

On Centos, you can run:



```sh

sudo yum install ImageMagick-devel

```



#### Arch Linux

On Arch Linux, you can run:



```sh

pacman -Syy imagemagick

```



#### Alpine Linux

On Alpine Linux, you can run:



```

apk add imagemagick imagemagick-dev imagemagick-libs

```



or you can run if you would like to use ImageMagick 6:



```

apk add imagemagick6 imagemagick6-dev imagemagick6-libs

```



### macOS

On macOS, you can run:



```sh

brew install imagemagick

```



or you can run if you would like to use ImageMagick 6:



```sh

brew install imagemagick@6

```



### Windows

1. Install latest Ruby+Devkit package which you can get from [RubyInstaller for Windows](https://rubyinstaller.org).

2. You might need to configure `PATH` environment variable to where the compiler is located.

   (Ex: `set PATH=C:\Ruby33-x64\bin;C:\Ruby33-x64\msys64\ucrt64\bin;%PATH%`)

3. Download `ImageMagick-7.XXXX-Q16-x64-dll.exe` (not, `ImageMagick-7.XXXX-Q16-x64-static.exe`) binary from [Windows Binary Release](https://imagemagick.org/script/download.php#windows), or you can download ImageMagick 6 from [Windows Binary Release](https://legacy.imagemagick.org/script/download.php#windows).

4. Install ImageMagick. You need to turn on checkboxes `Add application directory to your system path` and `Install development headers for C and C++` in an installer for RMagick.




If you want to install ImageMagick using [winget](https://learn.microsoft.com/en-us/windows/package-manager/winget/), run the following command:



```sh

winget install ImageMagick.ImageMagick --custom /TASKS=modifypath,install_Devel

```



Installing RMagick

------------------



### Installing via Bundler



Add to your `Gemfile`:



```rb

gem 'rmagick'

```



Then run:



```sh

bundle install

```



### Installing via RubyGems



Run:



```sh

gem install rmagick

```



### Versioning



RMagick is versioned according to Semantic Versioning. For stable version

compatible with Ruby 3.0+, use `~> 3.0`. Versions >= 6 work on Ruby >= 3.x

only.



Using RMagick

-------------



Require RMagick in your project as follows:



```rb

require 'rmagick'

```



See  for links to more information.



Things that can go wrong

------------------------



The [RMagick installation FAQ][faq] has answers to the most commonly reported

problems, though may be out of date.



### Can't install RMagick. Can't find libMagickCore-XXXX.so or one of the dependent libraries. Check the mkmf.log file for more detailed information



Typically this message means that one or more of the libraries that ImageMagick

depends on hasn't been installed. Examine the mkmf.log file in the ext/RMagick

subdirectory of the installation directory for any error messages. These

messages typically contain enough additional information for you to be able to

diagnose the problem. Also see [this FAQ][libmagick-faq].



### Cannot open shared object file



If you get a message like this:



```sh

... /core_ext/kernel_require.rb>:136:in `require': cannot load such file -- RMagick2.so (LoadError)

  (snip)

```



you probably do not have the directory in which the ImageMagick library

is installed in your load path. An easy way to fix this is to define

the directory in the `LD_LIBRARY_PATH` environment variable. For

example, suppose you installed the ImageMagick library `libMagickCore-XXXX.so` in

`/usr/local/lib`. (By default this is where it is installed.) Create the

`LD_LIBRARY_PATH` variable like this:



```sh

export LD_LIBRARY_PATH=/usr/local/lib

```



On Linux, see `ld(1)` and `ld.so(8)` for more information. On other operating

systems, see the documentation for the dynamic loading facility.



This operation might not be required when you can use 4.2.5 or later.



### Segmentation fault



Default stack size of your operating system might be too small. Try removing

the limit with this command:



```sh

ulimit -s unlimited

```



Upgrading

---------



If you upgrade to a newer release of ImageMagick, make sure you're using a

release of RMagick that supports that release. It's safe to install a new

release of RMagick over an earlier release.



More samples

------------



You can find more sample RMagick programs in the [/examples](https://github.com/rmagick/rmagick/tree/main/examples) and [/doc/ex](https://github.com/rmagick/rmagick/tree/main/doc/ex) directories. These

programs are not installed in the RMagick documentation tree.



Reporting bugs

--------------



Please report bugs in RMagick, its documentation, or its installation programs

via the bug tracker on the [RMagick issues page][issues].



However, We can't help with Ruby installation and configuration or ImageMagick

installation and configuration. Information about reporting problems and

getting help for ImageMagick is available at the [ImageMagick

website][imagemagick] or the [ImageMagick Forum][imagemagick-forum].



Development Setup

-----------------



In order to minimize issues on your local machine, we recommend that you make

use of a [Vagrant installation][dev-box].



Steps to get up and running with a passing build are as follows:



### 1) set up the Vagrant environment



If you don't already have Vagrant installed, you can download and install it

from [here][vagrant]. Once installed, we can set up a pre-built environment:



```sh

git clone https://github.com/tjschuck/rake-compiler-dev-box.git

cd rake-compiler-dev-box

vagrant up

```



This last part will probably take a while as it has to download an Ubuntu image

and configure it. If there is an error during this process, you may need to

reboot your computer and enable virtualization in your BIOS settings.



### 2) clone RMagick and log in to the vagrant box



Within the `rake-compiler-dev-box` directory:



```sh

git clone https://github.com/rmagick/rmagick.git # or your fork

vagrant ssh

```



### 3) install ImageMagick and additional environment stuff



```sh

cd /vagrant/rmagick

export IMAGEMAGICK_VERSION=6.8.9-10

bash ./before_install_linux.sh

```



This will take just a few minutes to build ImageMagick



### 4) build RMagick



```sh

rake

```



This compiles the RMagick extensions and runs the tests. If all goes well

you'll see a lot of output, eventually ending in something like:



```sh

Finished tests in 35.865734s, 11.3758 tests/s, 6560.3007 assertions/s.



408 tests, 235290 assertions, 0 failures, 0 errors, 0 skips

```



And you're all set! The copy of RMagick within `/vagrant/rmagick` inside your

Vagrant session is the same as the one in the `rake-compiler-dev-box` directory

on your machine. You can make changes locally and run tests within your `ssh`

session.



Credits

-------



**Authors:** Tim Hunter, Omer Bar-or, Benjamin Thomas



Thanks to [ImageMagick Studio LLC][imagemagick] for ImageMagick and for hosting

the RMagick documentation.



License

-----------



[MIT License](LICENSE)



Releasing

---------



See 



1.  Update ChangeLog

2.  Edit `lib/rmagick/version.rb`

3.  Are the tests passing? Run `rake` again just to be sure.

4.  `rake release`



[issues]: https://github.com/rmagick/rmagick/issues

[libmagick-faq]: https://web.archive.org/web/20140512193354/https://rmagick.rubyforge.org/install-faq.html#libmagick

[faq]: https://web.archive.org/web/20140512193354/https://rmagick.rubyforge.org/install-faq.html

[imagemagick]: https://imagemagick.org

[imagemagick-forum]: https://imagemagick.org/discourse-server

[dev-box]: https://github.com/tjschuck/rake-compiler-dev-box

[vagrant]: https://www.vagrantup.com/