Class: CropToelie

Inherits:
Object
  • Object
show all
Includes:
Magick
Defined in:
lib/croptoelie.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(image) ⇒ CropToelie

Create a new CropToelie object from a ImageList single image object.

If you want to provide a file by its path use CropToelie.from_file('/path/to/image.png').



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# File 'lib/croptoelie.rb', line 10

def initialize(image)
  @image = image

  # Hardcoded (but overridable) defaults.
  @steps  = 10

  # Preprocess image.
  @image = @image.quantize

  # Prepare some often-used internal variables.
  @rows = @image.rows
  @columns = @image.columns

  warn "DEPRECATED: 'croptoelie' gem is replaced by 'smartcropper'. http://github.com/berkes/smartcropper"
end

Instance Attribute Details

#orig ⇒ Object

Returns the value of attribute orig.



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# File 'lib/croptoelie.rb', line 5

def orig
  @orig
end

#steps ⇒ Object

Returns the value of attribute steps.



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# File 'lib/croptoelie.rb', line 6

def steps
  @steps
end

Class Method Details

.from_file(image_path) ⇒ Object

Open create a croptoelie from a file on disk.



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# File 'lib/croptoelie.rb', line 27

def self.from_file(image_path)
  image = ImageList.new(image_path).last
  return CropToelie.new(image)
end

Instance Method Details

#smart_crop(width, height) ⇒ Object

Crops an image to width x height



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# File 'lib/croptoelie.rb', line 33

def smart_crop(width, height)
  sq = square(width, height)
  return @image.crop!(sq[:left], sq[:top], width, height, true)
end

#smart_crop_and_scale(width, height) ⇒ Object

Squares an image (with smart_square) and then scales that to width, heigh



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# File 'lib/croptoelie.rb', line 39

def smart_crop_and_scale(width, height)
  smart_square
  return @image.scale!(width, height)
end

#smart_square ⇒ Object

Squares an image by slicing off the least interesting parts. Usefull for squaring images such as thumbnails. Usefull before scaling.



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# File 'lib/croptoelie.rb', line 46

def smart_square
  if @rows != @columns #None-square images must be shaved off.
    if @rows < @columns #landscape
      crop_height = crop_width = @rows
    else # portrait
      crop_height = crop_width = @columns
    end

    sq = square(crop_width, crop_height)
    @image.crop!(sq[:left], sq[:top], crop_width, crop_height, true)
  end

  @image
end

#square(width, height) ⇒ Object

Finds the most interesting square with size width x height.

Returns a hash => left, :top => top, :right => right, :bottom => bottom



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# File 'lib/croptoelie.rb', line 64

def square(width, height)
  return smart_crop_by_trim(width, height)
end