Added the 'paperclip_extended' stuff for supplying extra commands to ImageMagick

lib/paperclip/attachment.rb

@@ -15,7 +15,7 @@ module Paperclip
       }
     end
 
-    attr_reader :name, :instance, :styles, :default_style
+    attr_reader :name, :instance, :styles, :default_style, :convert_options
 
     # Creates an Attachment object. +name+ is the name of the attachment, +instance+ is the
     # ActiveRecord object instance it's attached to, and +options+ is the same as the hash
@@ -34,6 +34,7 @@ module Paperclip
       @default_style     = options[:default_style]
       @storage           = options[:storage]
       @whiny_thumbnails  = options[:whiny_thumbnails]
+      @convert_options   = options[:convert_options]
       @options           = options
       @queued_for_delete = []
       @queued_for_write  = {}
@@ -247,6 +248,7 @@ module Paperclip
           @queued_for_write[name] = Thumbnail.make(@queued_for_write[:original], 
                                                    dimensions,
                                                    format, 
+                                                   convert_options[name],
                                                    @whiny_thumnails)
         rescue PaperclipError => e
           @errors << e.message if @whiny_thumbnails

lib/paperclip/thumbnail.rb

@@ -2,18 +2,19 @@ module Paperclip
   # Handles thumbnailing images that are uploaded.
   class Thumbnail
 
-    attr_accessor :file, :current_geometry, :target_geometry, :format, :whiny_thumbnails
+    attr_accessor :file, :current_geometry, :target_geometry, :format, :whiny_thumbnails, :convert_options
 
     # Creates a Thumbnail object set to work on the +file+ given. It
     # will attempt to transform the image into one defined by +target_geometry+
     # which is a "WxH"-style string. +format+ will be inferred from the +file+
     # unless specified. Thumbnail creation will raise no errors unless
     # +whiny_thumbnails+ is true (which it is, by default.
-    def initialize file, target_geometry, format = nil, whiny_thumbnails = true
+    def initialize file, target_geometry, format = nil, convert_options = nil, whiny_thumbnails = true
       @file             = file
       @crop             = target_geometry[-1,1] == '#'
       @target_geometry  = Geometry.parse target_geometry
       @current_geometry = Geometry.from_file file
+      @convert_options  = convert_options
       @whiny_thumbnails = whiny_thumbnails
 
       @current_format   = File.extname(@file.path)
@@ -24,8 +25,8 @@ module Paperclip
 
     # Creates a thumbnail, as specified in +initialize+, +make+s it, and returns the
     # resulting Tempfile.
-    def self.make file, dimensions, format = nil, whiny_thumbnails = true
-      new(file, dimensions, format, whiny_thumbnails).make
+    def self.make file, dimensions, format = nil, convert_options = nil, whiny_thumbnails = true
+      new(file, dimensions, format, convert_options, whiny_thumbnails).make
     end
 
     # Returns true if the +target_geometry+ is meant to crop.
@@ -61,6 +62,7 @@ module Paperclip
       scale, crop = @current_geometry.transformation_to(@target_geometry, crop?)
       trans = "-scale \"#{scale}\""
       trans << " -crop \"#{crop}\" +repage" if crop
+      trans << " #{convert_options}" if convert_options
       trans
     end
   end