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Versions: 7
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Contents
require 'RMagick'
module Technoweenie # :nodoc:
module AttachmentFu # :nodoc:
module Processors
module RmagickProcessor
def self.included(base)
base.send :extend, ClassMethods
base.alias_method_chain :process_attachment, :processing
end
module ClassMethods
# Yields a block containing an RMagick Image for the given binary data.
def with_image(file, &block)
begin
binary_data = file.is_a?(Magick::Image) ? file : Magick::Image.read(file).first unless !Object.const_defined?(:Magick)
rescue
# Log the failure to load the image. This should match ::Magick::ImageMagickError
# but that would cause acts_as_attachment to require rmagick.
logger.debug("Exception working with image: #{$!}")
binary_data = nil
end
block.call binary_data if block && binary_data
ensure
!binary_data.nil?
end
end
protected
def process_attachment_with_processing
return unless process_attachment_without_processing
with_image do |img|
resize_image_or_thumbnail! img
self.width = img.columns if respond_to?(:width)
self.height = img.rows if respond_to?(:height)
callback_with_args :after_resize, img
end if image?
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 && !size.first.is_a?(Fixnum)
if size.is_a?(Fixnum) || (size.is_a?(Array) && size.first.is_a?(Fixnum))
size = [size, size] if size.is_a?(Fixnum)
img.thumbnail!(*size)
else
img.change_geometry(size.to_s) { |cols, rows, image| image.resize!(cols, rows) }
end
self.temp_path = write_to_temp_file(img.to_blob)
end
end
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems