Contents

require 'rubygems'
require 'gd2'

module AttachmentFu # :nodoc:
  module Processors
    module Gd2Processor
      def self.included(base)
        base.send :extend, ClassMethods
        base.alias_method_chain :process_attachment, :processing
      end
      
      module ClassMethods
        # Yields a block containing a GD2 Image for the given binary data.
        def with_image(file, &block)
          im = GD2::Image.import(file)
          block.call(im)
        end
      end

      protected
        def process_attachment_with_processing
          return unless process_attachment_without_processing && image?
          with_image do |img|
            resize_image_or_thumbnail! img
            self.width  = img.width
            self.height = img.height
            callback_with_args :after_resize, img
          end
        end

        # Performs the actual resizing operation for a thumbnail
        def resize_image(img, size)
          size = size.first if size.is_a?(Array) && size.length == 1
          if size.is_a?(Fixnum) || (size.is_a?(Array) && size.first.is_a?(Fixnum))
            if size.is_a?(Fixnum)
              # Borrowed from image science's #thumbnail method and adapted 
              # for this.
              scale = size.to_f / (img.width > img.height ? img.width.to_f : img.height.to_f)
              img.resize!((img.width * scale).round(1), (img.height * scale).round(1), false)
            else
              img.resize!(size.first, size.last, false) 
            end
          else
            w, h = [img.width, img.height] / size.to_s
            img.resize!(w, h, false)
          end
          temp_paths.unshift random_tempfile_filename
          self.size = img.export(self.temp_path)
        end

    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
futuresinc-attachment_fu-1.0.5	lib/attachment_fu/processors/gd2_processor.rb
futuresinc-attachment_fu-1.0.6	lib/attachment_fu/processors/gd2_processor.rb
futuresinc-attachment_fu-1.0.7	lib/attachment_fu/processors/gd2_processor.rb