Class: Dragonfly::ImageMagick::Processors::Thumb

Inherits:
Object
  • Object
show all
Includes:
ParamValidators
Defined in:
lib/dragonfly/image_magick/processors/thumb.rb

Constant Summary collapse

GRAVITIES = 
{
  "nw" => "NorthWest",
  "n" => "North",
  "ne" => "NorthEast",
  "w" => "West",
  "c" => "Center",
  "e" => "East",
  "sw" => "SouthWest",
  "s" => "South",
  "se" => "SouthEast",
}
RESIZE_GEOMETRY =

Geometry string patterns

/\A\d*x\d*[><%^!]?\z|\A\d+@\z/
CROPPED_RESIZE_GEOMETRY =

e.g. ‘20x50#ne’

/\A(\d+)x(\d+)#(\w{1,2})?\z/
CROP_GEOMETRY =

e.g. ‘30x30+10+10’

/\A(\d+)x(\d+)([+-]\d+)?([+-]\d+)?(\w{1,2})?\z/

Constants included from ParamValidators

ParamValidators::IS_NUMBER, ParamValidators::IS_WORD, ParamValidators::IS_WORDS

Instance Method Summary collapse

Methods included from ParamValidators

is_number, is_word, is_words, validate!, validate_all!, validate_all_keys!

Instance Method Details

#args_for_geometry(geometry) ⇒ Object 



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# File 'lib/dragonfly/image_magick/processors/thumb.rb', line 40

def args_for_geometry(geometry)
  case geometry
  when RESIZE_GEOMETRY
    resize_args(geometry)
  when CROPPED_RESIZE_GEOMETRY
    resize_and_crop_args($1, $2, $3)
  when CROP_GEOMETRY
    crop_args(
      "width" => $1,
      "height" => $2,
      "x" => $3,
      "y" => $4,
      "gravity" => $5,
    )
  else raise ArgumentError, "Didn't recognise the geometry string #{geometry}"
  end
end

#call(content, geometry, opts = {}) ⇒ Object 



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# File 'lib/dragonfly/image_magick/processors/thumb.rb', line 31

def call(content, geometry, opts = {})
  validate!(opts["format"], &is_word)
  validate!(opts["frame"], &is_number)
  Commands.convert(content, args_for_geometry(geometry), {
    "format" => opts["format"],
    "frame" => opts["frame"],
  })
end

#update_url(url_attributes, geometry, opts = {}) ⇒ Object 



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# File 'lib/dragonfly/image_magick/processors/thumb.rb', line 26

def update_url(url_attributes, geometry, opts = {})
  format = opts["format"]
  url_attributes.ext = format if format
end