Module: UploadColumn::Manipulators::ImageScience

Defined in:
lib/upload_column/manipulators/image_science.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/upload_column/manipulators/image_science.rb', line 6

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/upload_column/manipulators/image_science.rb', line 6

def width
  @width
end

Instance Method Details

#crop_resized!(geometry) ⇒ Object

Resize and crop the image so that it will have the exact dimensions passed via geometry, geometry should be a string, formatted like ‘200x100’ where the first number is the height and the second is the width



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# File 'lib/upload_column/manipulators/image_science.rb', line 35

def crop_resized!( geometry )
  ::ImageScience.with_image(self.path) do |img|
    new_width, new_height = geometry.split('x').map{|i| i.to_i }

    width, height = extract_dimensions_for_crop(img.width, img.height, geometry)
    x_offset, y_offset = extract_placement_for_crop(width, height, geometry)

    img.resize( width, height ) do |i2|

      i2.with_crop( x_offset, y_offset, new_width + x_offset, new_height + y_offset) do |file|
        file.save( self.path )
      end
    end
  end
end

#load_manipulator_dependencies ⇒ Object

:nodoc:



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# File 'lib/upload_column/manipulators/image_science.rb', line 8

def load_manipulator_dependencies #:nodoc:
  require 'image_science'
end

#process!(instruction) ⇒ Object 



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# File 'lib/upload_column/manipulators/image_science.rb', line 12

def process!(instruction)
  if instruction.to_s =~ /^c(\d+x\d+)/
    crop_resized!($1)
  elsif instruction.to_s =~ /\d+x\d+/
    resize!(instruction)
  end
end

#resize!(geometry) ⇒ Object

Resize the image so that it will not exceed the dimensions passed via geometry, geometry should be a string, formatted like ‘200x100’ where the first number is the height and the second is the width



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# File 'lib/upload_column/manipulators/image_science.rb', line 23

def resize!( geometry )
  ::ImageScience.with_image(self.path) do |img|
    width, height = extract_dimensions(img.width, img.height, geometry)
    img.resize( width, height ) do |file|
      file.save( self.path )
    end
  end
end