Djvu

Ruby interface for DjVuLibre tools.

Installation

Install DjVuLibre with this oneliner:

sudo apt-get update && sudo apt-get install checkinstall && wget http://downloads.sourceforge.net/djvu/djvulibre-3.5.27.tar.gz && tar -xvzf djvulibre-3.5.27.tar.gz && rm djvulibre-3.5.27.tar.gz && cd djvulibre-3.5.27 && sudo ./configure && sudo make && sudo checkinstall && cd ../ && sudo rm -rf djvulibre-3.5.27

If you need remove package:

sudo dpkg -r djvulibre

Add this line to your application's Gemfile:

gem 'djvu'

And then execute:

$ bundle

Or install it yourself as:

$ gem install djvu

And require:

require 'djvu'

Usage

ddjvu

Djvu.file('Alice_in_Wonderland.djvu').ddjvu(format: 'ppm', page: 1, output_file: '1.ppm')

Convert ppm to any image format with rmagick or minimagick:

MiniMagick::Image.open('1.ppm').format('png').write('1.png')

djvutxt

# Extract text layer from page to txt file
Djvu.file('Alice_in_Wonderland.djvu').djvutxt(page: 8, output_file: '1.txt')
# Extract text layer from page to variable
text = Djvu.file('Alice_in_Wonderland.djvu').djvutxt(page: 8)

djvudump

dump = Djvu.file('Alice_in_Wonderland.djvu').djvudump

djvused

# Getting number of pages in djvu file
num = Djvu.file('Alice_in_Wonderland.djvu').djvused(e: 'n')

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/1v/djvu.

License

The gem is available as open source under the terms of the MIT License.