diff --git a/pitfall/pitfall/sample-unicode-text.rkt b/pitfall/pitfall/sample-unicode-text.rkt
new file mode 100644
index 00000000..90692998
--- /dev/null
+++ b/pitfall/pitfall/sample-unicode-text.rkt
@@ -0,0 +1,148 @@
+#lang at-exp br
+(require pitfall/render)
+
+(define cosh (make-co-hash))
+
+;; catalog object
+(+co-hash cosh 1 (co-catalog #:pages (make-co-io-ref 2)))
+
+;; pages
+(+co-hash cosh 2 (co-pages #:kids (list (make-co-io-ref 3))
+                           #:count 1))
+;; page
+(+co-hash cosh 3 (co-page #:parent (make-co-io-ref 2)
+                          #:mediabox '(0 0 400 400)
+                          #:resources (make-co-io-ref 4)
+                          #:contents (make-co-io-ref 5)
+                    
+                          ; the value of annots must be an array
+                          #:annots (co-array (list (make-co-io-ref 7)))
+                          ))
+#;#:annots #;(make-co-io-ref 7)
+
+;; resources
+(+co-hash cosh 4
+          (make-co-dict
+           'ProcSet (co-array '(PDF Text))
+           'Font (make-co-dict 'F1 (make-co-io-ref 6)
+                               'F2 (make-co-io-ref 9)
+                               'F3 (make-co-io-ref 12))))
+
+
+
+(define (pdf-char-encode c)
+  (format "<~a>"  (string-join (for/list ([b (in-bytes (string->bytes/utf-8 (string c)))])
+            (number->string b 16)) " ")))
+(pdf-char-encode #\’)
+
+(define (typeset-text str size font-path)
+  (string->bytes/latin-1
+   (string-append*
+    (for/list ([c (in-string str)])
+      (format "~a Tj ~a 0 Td"
+              (pdf-char-encode c)
+              (/ (* size (measure-char font-path c)) 1000.0))))))
+
+
+
+;; Charter font
+(define charter-font-path "charter.otf")
+(+co-hash cosh 6
+          (make-co-dict
+           'Type 'Font
+           'Subtype 'Type1
+           'Name 'F1
+           'FontDescriptor (make-co-dict
+                            'Type 'FontDescriptor
+                            'FontFile3 (make-co-io-ref 8)
+                            'Flags 4
+                            'FontBBox (co-array '(-177 -269 1123 866))
+                            'MissingWidth 255
+                            'StemV 105
+                            'StemH 45
+                            'CapHeight 660
+                            'XHeight 394
+                            'Ascent 720
+                            'Descent -270
+                            'Leading 83
+                            'MaxWidth 1212
+                            'AvgWidth 478
+                            'ItalicAngle 0)
+           'Encoding (make-co-io-ref 25)))
+
+(require "glyph-list.rkt")
+(+co-hash cosh 25
+          (make-co-dict
+           'Type 'Encoding
+           'Differences (co-array (flatten glyph-list))))
+
+(+co-hash cosh 8 (make-font-co-stream charter-font-path))
+
+;; Miso font
+(define miso-font-path "miso.otf")
+(+co-hash cosh 9
+          (make-co-dict
+           'Type 'Font
+           'Subtype 'Type1
+           'Name 'F2
+           'FontDescriptor (make-co-dict
+                            'Type 'FontDescriptor
+                            'FontFile3 (make-co-io-ref 10)
+                            'Flags 4
+                            'FontBBox (co-array '(-177 -269 1123 866))
+                            'MissingWidth 255
+                            'StemV 105
+                            'StemH 45
+                            'CapHeight 660
+                            'XHeight 394
+                            'Ascent 720
+                            'Descent -270
+                            'Leading 83
+                            'MaxWidth 1212
+                            'AvgWidth 478
+                            'ItalicAngle 0)
+           'Encoding (make-co-io-ref 25)))
+
+(+co-hash cosh 10 (make-font-co-stream miso-font-path))
+
+;; fira font
+(define fira-font-path "fira.otf")
+(+co-hash cosh 12
+          (make-co-dict
+           'Type 'Font
+           'Subtype 'Type1
+           'Name 'F3
+           'FontDescriptor (make-co-dict
+                            'Type 'FontDescriptor
+                            'FontFile3 (make-co-io-ref 13)
+                            'Flags 4
+                            'FontBBox (co-array '(-177 -269 1123 866))
+                            'MissingWidth 255
+                            'StemV 105
+                            'StemH 45
+                            'CapHeight 660
+                            'XHeight 394
+                            'Ascent 720
+                            'Descent -270
+                            'Leading 83
+                            'MaxWidth 1212
+                            'AvgWidth 478
+                            'ItalicAngle 0)
+           'Encoding (make-co-io-ref 25)))
+
+(+co-hash cosh 13 (make-font-co-stream fira-font-path))
+
+
+;; contents
+(+co-hash cosh 5
+          (make-co-stream
+           (bytes-append
+            #"BT /F1 36 Tf 50 50 Td"
+            (typeset-text "Hel’o Wørld 4-1" 36 charter-font-path)
+            #"/F2 36 Tf -250 50 Td"
+            (typeset-text "Ençhîládà 10" 36 miso-font-path)
+            #"/F3 36 Tf -150 50 Td"
+            (typeset-text "Bõîng Mé 5" 36 fira-font-path)
+            #"ET")))
+
+(render cosh)