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@@ -59,6 +59,7 @@ module Prawn
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     # <tt>:top_margin</tt>:: Sets the top margin in points [ 0.5 inch]
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     # <tt>:bottom_margin</tt>:: Sets the bottom margin in points [0.5 inch]
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     # <tt>:skip_page_creation</tt>:: Creates a document without starting the first page [false]
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+    # <tt>:compress</tt>:: Compresses content streams before rendering them [false]
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     # 
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     #                             
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     #   # New document, US Letter paper, portrait orientation
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@@ -80,6 +81,7 @@ module Prawn
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        @page_stop_proc  = options[:on_page_end]              
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        @page_size   = options[:page_size]   || "LETTER"    
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        @page_layout = options[:page_layout] || :portrait
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+       @compress = options[:compress] || false
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        @margins = { :left   => options[:left_margin]   || 36,
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                     :right  => options[:right_margin]  || 36,  
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@@ -239,6 +241,11 @@ module Prawn
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       yield
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       fields.each { |f| send("#{f}=", stored[f]) }
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     end
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+
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+    def compression_enabled?
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+      @compress
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+    end
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+
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     private 
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@@ -286,6 +293,7 @@ module Prawn
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     def finish_page_content     
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       @page_stop_proc[self] if @page_stop_proc
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       add_content "Q"
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+      @page_content.compress_stream if compression_enabled?
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       @page_content.data[:Length] = @page_content.stream.size
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     end
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@@ -6,6 +6,8 @@
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 #
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 # This is free software. Please see the LICENSE and COPYING files for details.
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+require 'zlib'
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+
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 module Prawn  
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   class Reference #:nodoc:
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@@ -17,6 +19,7 @@ module Prawn
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       @identifier = id 
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       @gen   = 0       
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       @data  = data     
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+      @compressed = false
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     end            
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     def object 
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@@ -29,13 +32,19 @@ module Prawn
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     end  
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     def <<(data)
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+      raise 'Cannot add data to a stream that is compressed' if @compressed
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       (@stream ||= "") << data  
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     end  
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     def to_s            
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       "#{@identifier} #{gen} R"
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     end
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-      
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+
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+    def compress_stream
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+      @stream = Zlib::Deflate.deflate(@stream)
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+      @data[:Filter] = :FlateDecode
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+      @compressed = true
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+    end
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   end         
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   module_function

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@@ -73,6 +73,30 @@ describe "When ending each page" do
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     pdf.render
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   end
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+  it "should not compress the page content stream if compression is disabled" do
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+
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+    pdf = Prawn::Document.new(:compress => false)
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+    content_stub = pdf.ref({})
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+    content_stub.stub!(:compress_stream).and_return(true)
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+    content_stub.should_not_receive(:compress_stream)
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+
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+    pdf.instance_variable_set("@page_content", content_stub)
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+    pdf.text "Hi There" * 20
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+    pdf.render
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+  end
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+
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+  it "should compress the page content stream if compression is enabled" do
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+
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+    pdf = Prawn::Document.new(:compress => true)
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+    content_stub = pdf.ref({})
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+    content_stub.stub!(:compress_stream).and_return(true)
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+    content_stub.should_receive(:compress_stream).exactly(1).times
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+
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+    pdf.instance_variable_set("@page_content", content_stub)
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+    pdf.text "Hi There" * 20
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+    pdf.render
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+  end
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+
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 end                                 
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 class PageDetails      

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@@ -26,4 +26,16 @@ describe "A Reference object" do
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                            "\nBT\n/F1 12 Tf\n72 712 Td\n( A stream ) Tj\nET" +
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                            "\nendstream\nendobj\n"
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   end
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+
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+  it "should compress a stream upon request" do
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+    ref = Prawn::Reference(2,{})
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+    ref << "Hi There " * 20
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+
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+    cref = Prawn::Reference(2,{})
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+    cref << "Hi There " * 20
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+    cref.compress_stream
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+
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+    (cref.stream.size < ref.stream.size).should be_true
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+    cref.data[:Filter].should eql(:FlateDecode)
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+  end
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 end

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@@ -9,6 +9,12 @@ require "prawn"
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 gem 'pdf-reader', ">=0.7.3"
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 require "pdf/reader"
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+module Prawn
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+  class Document
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+    public :ref
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+  end
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+end
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+
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 def create_pdf
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   @pdf = Prawn::Document.new(:left_margin   => 0,
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                              :right_margin  => 0,