Class: Paperclip::Vips

Inherits:
Processor
  • Object
show all
Defined in:
lib/paperclip/vips.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file, options = {}, attachment = nil) ⇒ Vips

Returns a new instance of Vips.

[View source]

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# File 'lib/paperclip/vips.rb', line 6

def initialize(file, options = {}, attachment = nil)
  super

  geometry = options[:geometry].to_s
  @should_crop = geometry[-1, 1] == "#"
  @target_geometry = options.fetch(:string_geometry_parser, Geometry).parse(geometry)
  @current_geometry = options.fetch(:file_geometry_parser, Geometry).from_file(@file)
  @whiny = options.fetch(:whiny, true)

  @auto_orient = options.fetch(:auto_orient, true)
  @convert_options = options[:convert_options]

  @current_format = current_format(file).downcase
  @format = options[:format] || @current_format

  @basename = File.basename(@file.path, @current_format)
end

Instance Attribute Details

#auto_orient ⇒ Object

Returns the value of attribute auto_orient.


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# File 'lib/paperclip/vips.rb', line 3

def auto_orient
  @auto_orient
end

#convert_options ⇒ Object

Returns the value of attribute convert_options.


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# File 'lib/paperclip/vips.rb', line 3

def convert_options
  @convert_options
end

#current_geometry ⇒ Object

Returns the value of attribute current_geometry.


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# File 'lib/paperclip/vips.rb', line 3

def current_geometry
  @current_geometry
end

#format ⇒ Object

Returns the value of attribute format.


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# File 'lib/paperclip/vips.rb', line 3

def format
  @format
end

#source_file_options ⇒ Object

Returns the value of attribute source_file_options.


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# File 'lib/paperclip/vips.rb', line 3

def source_file_options
  @source_file_options
end

#target_geometry ⇒ Object

Returns the value of attribute target_geometry.


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# File 'lib/paperclip/vips.rb', line 3

def target_geometry
  @target_geometry
end

#whiny ⇒ Object

Returns the value of attribute whiny.


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# File 'lib/paperclip/vips.rb', line 3

def whiny
  @whiny
end

Instance Method Details

#make ⇒ Object

[View source]

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# File 'lib/paperclip/vips.rb', line 24

def make
  source = @file
  filename = [@basename, @format ? ".#{@format}" : ""].join
  destination = TempfileFactory.new.generate(filename)

  begin
    if @target_geometry.present?
      target_width = @target_geometry.width
      target_height = @target_geometry.height
      modifier = @target_geometry.modifier # e.g., ">", "#", etc.

      # Use thumbnail for efficient resizing and cropping
      crop = (modifier == "#")
      thumbnail = ::Vips::Image.thumbnail(
        source.path,
        target_width,
        height: crop ? target_height : nil,
        size: (modifier == ">" ? :down : :both), # ">" means shrink only
        crop: crop ? :centre : :none
      )

      # Additional cropping for exact "#" dimensions if needed
      if crop && (thumbnail.width != target_width || thumbnail.height != target_height)
        left = [0, (thumbnail.width - target_width) / 2].max
        top = [0, (thumbnail.height - target_height) / 2].max
        crop_width = [target_width, thumbnail.width - left].min
        crop_height = [target_height, thumbnail.height - top].min
        if crop_width.positive? && crop_height.positive?
          thumbnail = thumbnail.crop(left, top, crop_width,
            crop_height)
        end
      end
    end

    # Fallback to original image if no geometry
    thumbnail = ::Vips::Image.new_from_file(source.path) unless defined?(thumbnail) && thumbnail

    # Apply convert options
    thumbnail = process_convert_options(thumbnail)

    # Save the processed image
    save_thumbnail(thumbnail, destination.path)
  rescue StandardError => e
    puts e.message, e.backtrace
    if @whiny
      message = "There was an error processing the thumbnail for #{@basename}:\n#{e.message}"
      raise Paperclip::Error, message
    end
  end

  destination # Return the Tempfile object
end