Balmung

Balmung is tool for generating compressed and responsive images.

This app is under development

Features

• Web UI
• Resize images for various pixel ratio
• Compress images
• Flexible compression settings per directory, file and size
• Export custom settings for grunt tasks (grunt-balmung)
• Automatic update of git or svn repository

Compression tools

• png
  • pngquant
  • optipng
  • zopfli
• jpg
  • jpegtran
• gif
  • gifsicle

Quickstart

Server should have installed ImageMagick before starting.

Install balmung

npm install -g balmung

To start balmung server, run

balmung

Access http://127.0.0.1:7700 with your web browser after launching.

Command line options

• config: path of the config file
• port: port number to listen web

To execute with your customized configuration, run

balmung --config /etc/balmung.js --port 8080

Configuration

You can customize balmung with simple javascript file.

module.exports = {
 
  // Working directory
  datadir: './content',
  // Settings to be written
  settings: './content/balmung-settings.json',
 
  /* Repository settings to get contents from VCS
  repository: {
    type: 'git', // git or svn
    url: 'https://github.com/xyz/xyz.git', // URL of the repository
    update: 60000 // update interval (millisec)
  },
  */
 
  // resize default
  resize: {
    // ratio list to be generated
    ratio: [1.0, 1.3, 1.5, 2.0, 3.0],
    // base ratio of images in source directory
    base: 3.0,
    // unsharp option after resizing
    unsharp: '2x1.4+0.5+0',
    // resizing concurrency
    concurrency: 4,
    // Replace patterns of directory and file name.
    // {dirname} - base directory name
    // {ratio} - pixel ratio
    // {ratiox10} - pixel ratio * 10
    // {basename} - base name of the file. ex) example.png -> example
    // {extname} - extension name of the file. ex) example.png -> .png
    dirname: '{dirname}',
    filename: '{basename}_{ratiox10}{extname}'
  },
 
  // optimizer
  optimize: {
    // optimizing concurrency
    concurrency: 2,
    // Default image filter to be used
    tools: {
      jpg: ['jpegtran'],
      png: ['pngquant', 'optipng', 'zopfli'],
      gif: ['gifsicle']
    }
  },
 
  // pngquant
  pngquant: {
    color: 256,
    speed: 3
  },
 
  // optipng
  optipng: {
    level: 3
  },
 
  // zopfli
  zopfli: {
  },
 
  // jpegtran
  jpegtran: {
    optimize: true,
    copy: 'none'
  },
 
  // gifsicle
  gifsicle: {
    level: 3
  },
 
  logger: {
    appenders: {
      console: { type: 'console' }
    }
  }
  
};

Grunt

grunt-balmung is a grunt task which optimize images with same options of balmung server.

npm install grunt-balmung --save-dev

grunt task

{
  balmung: {
    ..
  }
}
 

Author

Suguru Namura

License

MIT