Dragonfly PDF

Dragonfly PDF analysers and processors.

Dependencies

• libvips
• GhostScript
• mupdf
• pdftk

Installation

Add this line to your application's Gemfile:

gem 'dragonfly_pdf'

And then execute:

$ bundle

Or install it yourself as:

$ gem install dragonfly_pdf

Usage

The analyser and processors are added by configuring the plugin

Dragonfly.app.configure do
  plugin :pdf
end

Supported Formats

List of supported formats is available as:

DragonflyPdf::SUPPORTED_FORMATS # => ["pdf"]
DragonflyPdf::SUPPORTED_OUTPUT_FORMATS # => ["pdf", "svg", …]

Analysers

PDF properties

Reads properties from a PDF.

pdf.pdf_properties # => {
    page_count: 4,
    page_dimensions: [[210.0, 297.0], [210.0, 297.0], [210.0, 297.0], [210.0, 297.0]],
    page_numbers: [1, 2, 3, 4],
    aspect_ratios: [0.71, 0.71, 0.71, 0.71],
    page_rotations: [0.0, 90.0, 0.0, 0.0]
}

Processors

Append

Append PDFs.

pdf.append([pdf_1, pdf_2, pdf_3])

Page

Extracts page from PDF.

pdf.page(page_number=1)

Page Thumb

Generates thumbnail of a specified page using the thumb processor of DragonflyLibvips.

pdf.page_thumb(page_number=1, '500x', opts={})

The default format is png, others can be specified

{
    'format' => 'jpg',
}

For more options see the thumb doc.

Remove password

Remove password from password protected PDF.

pdf.remove_password

Rotate

Rotate all pages.

pdf.rotate(:left)

Rotate selected pages.

pdf.rotate(1 => :left, 3 => :right)

absolute: north|south|east|west relative: left|right|down

Stamp

Stamp every page of a PDF with another PDF.

pdf.stamp(stamp_pdf)

Subset Fonts

Subset fonts in PDF.

pdf.subset_fonts

Contributing

1. Fork it ( https://github.com/tomasc/dragonfly_pdf/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request