projects.mako.cc - selectricity-live/blob - vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/processors/core_image_processor.rb

   1 require 'red_artisan/core_image/processor'
   2
   3 module Technoweenie # :nodoc:
   4   module AttachmentFu # :nodoc:
   5     module Processors
   6       module CoreImageProcessor
   7         def self.included(base)
   8           base.send :extend, ClassMethods
   9           base.alias_method_chain :process_attachment, :processing
  10         end
  11
  12         module ClassMethods
  13           def with_image(file, &block)
  14             block.call OSX::CIImage.from(file)
  15           end
  16         end
  17
  18         protected
  19           def process_attachment_with_processing
  20             return unless process_attachment_without_processing
  21             with_image do |img|
  22               self.width  = img.extent.size.width  if respond_to?(:width)
  23               self.height = img.extent.size.height if respond_to?(:height)
  24               resize_image_or_thumbnail! img
  25               callback_with_args :after_resize, img
  26             end if image?
  27           end
  28
  29           # Performs the actual resizing operation for a thumbnail
  30           def resize_image(img, size)
  31             processor = ::RedArtisan::CoreImage::Processor.new(img)
  32             size = size.first if size.is_a?(Array) && size.length == 1
  33             if size.is_a?(Fixnum) || (size.is_a?(Array) && size.first.is_a?(Fixnum))
  34               if size.is_a?(Fixnum)
  35                 processor.fit(size)
  36               else
  37                 processor.resize(size[0], size[1])
  38               end
  39             else
  40               new_size = [img.extent.size.width, img.extent.size.height] / size.to_s
  41               processor.resize(new_size[0], new_size[1])
  42             end
  43
  44             processor.render do |result|
  45               self.width  = result.extent.size.width  if respond_to?(:width)
  46               self.height = result.extent.size.height if respond_to?(:height)
  47
  48               # Get a new temp_path for the image before saving
  49               temp_paths.unshift Tempfile.new(random_tempfile_filename, Technoweenie::AttachmentFu.tempfile_path).path
  50               result.save self.temp_path, OSX::NSJPEGFileType
  51               self.size = File.size(self.temp_path)
  52             end
  53           end
  54       end
  55     end
  56   end
  57 end
  58
  59