Module: Jekyll::Filters::Dzsave

Defined in:
lib/jekyll/filters/dzsave.rb

Overview

Liquid filter for use in templates

Instance Method Summary collapse

Instance Method Details

#dzsave(input, layout = 'google', tile_size = 256) ⇒ Object

Generates an image pyramid

See Also:



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# File 'lib/jekyll/filters/dzsave.rb', line 10

def dzsave(input, layout = 'google', tile_size = 256)
  return input unless input

  site = @context.registers[:site]
  path = site.in_source_dir(input)

  unless ::File.exist?(path)
    Jekyll.logger.warn "File doesn't exist #{input}"
    return input
  end

  dir = ::File.dirname(input)
  previous_tiles = []

  Dir.chdir(site.source) do
    previous_tiles = Dir.glob(::File.join(dir, '*', '**', '*.jpg'))
  end

  image = Vips::Image.new_from_file(path, access: :sequential)
  image.dzsave(dir, layout: layout, tile_size: tile_size)

  Dir.chdir(site.source) do
    (Dir.glob(::File.join(dir, '*', '**', '*.jpg')) - previous_tiles).each do |tile|
      site.static_files << Jekyll::StaticFile.new(site, site.source, ::File.dirname(tile), ::File.basename(tile))
    end
  end

  "#{dir}/{z}/{y}/{x}.jpg"
rescue Vips::Error => e
  Jekyll.logger.warn "Failed to process #{input}: #{e.message}"
  input
end