how to create type 3 glyphs in postscript

Question

%%LanguageLevel: 3 
8 dict begin
/FontName /T3_414 def
/FontType 3 def
/FontBBox [ 0 0 1  1  ] def
/FontMatrix [0.011368 0 0  0.011368 0 0  ] def 
/Encoding 256 array def
0 1 255 {Encoding exch /.notdef put} for
Encoding 97 /g7516  put 
/BuildGlyph 
{ exch /CharProcs get exch % Get CharProcs dictionary 
2 copy known not % See if charname is known 
{ pop /.notdef } 
    if 
        get exec % Execute BuildGlyph procedure 
} bind def 
    /BuildChar % LanguageLevel 1 compatibility 
    { 1 index /Encoding get exch get 
        1 index /BuildGlyph get exec 
    } bind def 
/CharProcs 255 dict def
CharProcs begin 
/.notdef {} bind def
/g7516{

75 0 3  62 71 7  setcachedevice 
gsave
[
0.01  0  0  0.01  0  0  ] concat 
gsave
[6800 0 0  6900 300 700  ]concat

<<
/ImageType 1
  /Width  68
  /Height  69
  /ImageMatrix [  68 0 0  -69 0 69]
  /BitsPerComponent  1

  /Decode [1 0]
  /DataSource <78 9c 5d d1 3b 4e c3 40 10 06 e0 59 1c b1 ae 70
0a 4a e4 e4 06 70 80 08 ef 31 68 39 02 9d 23 81
6c 23 24 52 72 20 9a 1c 83 22 c2 a0 1c 80 96 02
21 47 29 68 50 ec 54 06 39 4a fe d9 9d 18 0b 57
9f d6 b3 b3 f3 50 d4 f9 bc cd 1e 33 23 f8 ee ff
c7 c7 f0 0f b9 b1 c1 8a d4 27 9f ea 27 e3 e2 20
5d f9 ba b6 81 9b 9e d7 58 6c 0f d4 b3 d1 e3 d4
dd 6f 11 5c 59 a8 56 40 45 7e 2d 38 59 0a ce 5f
19 83 82 92 8c 28 b1 91 59 4a 51 ce 78 31 88 0b
17 9c 84 3f 17 da c5 68 2e b8 be eb e0 f0 17 88
27 36 3d 51 ed 23 fd 65 8a 24 25 9a 88 b2 24 77
91 45 54 a8 95 b4 ef 1a 75 ed 2b 5b 04 66 e5 fe
a2 69 6a 7a d2 59 ad f6 ad 71 2e ae 9a ca 63 8c
01 35 52 19 ae 5d 65 e5 29 8e 6f 6e a5 93 f8 5e
3a a9 e3 07 7b 4b ad 38 89 15 bf ca f0 66 17 5f
16 7a fc b8 b4 08 2a d4 ce 08 17 78 97 31 9a a3
12 46 3c d1 ef c3 b2 af f8 2a ca c5 11 f2 60 41
80 2b 1a d0 3f 7c 08 1c ad 05 98 37 d6 04 9c bd
11 a5 9c 91 b7 ac dc fb 76 04 32 8b a0 ac 1c bc
46 40 db 42 a6 13 4d 05 83 a9 69 57 2a db e1 a1
ef 20 17 c7 86 b3>

  <<
  /Predictor 15
  /Columns 68>>
/FlateDecode filter   

 >>
imagemask 
grestore
grestore
} bind def


end 
currentdict end

/Examplefont exch definefont pop
/Examplefont findfont 12 scalefont setfont
36 52 moveto
(ababab) show

I am working on type 3 fonts in postscript. i am trying to debug this file and there is an error. ioerror imagemask. The input glyph in pdf file looks like this. i have converted binary data to ascii hex as i found no way to use it as is.

   stream
75 0 3 -62 71 7 d1
0.01 0 0 0.01 0 0 cm
q 6800 0 0 -6900 300 700 cm
BI
/IM true
/W 68
/H 69
/BPC 1
/D[1
0]
/F/Fl
/DP<</Predictor 15
/Columns 68>>
ID xœ]Ñ;NÃ@àY±®p
Jääp€ï1h9#l#$Rr šƒ" €–!G)hPìT9JþÙWŸÖ³³óPÔù¼Í3#øîÿÇÇð¹±ÁŠÔ'Ÿê'ãâ ]ùº¶›ž×XlÔ³ÑãÔÝo\Y¨V@E~-8Y
Î_ƒ‚’Œ(±‘YJQÎx1ˆœ„?ÚÅh.¸¾ëàðˆ'6=Qí#ýeŠ$%šˆ²$w‘ET¨•´ïuí+[fåþ¢ijzÒY­ö­q.®šÊcŒ5R®]eå)Žon¥“ø^:©ã{K­8‰¿Êðf_zü¸´*ÔÎx—1š£F<Ñïò¯ø*ÊÅò`A€+Ð?|­˜7Öœ½¥œ‘·¬Üûv2‹ ¬¼F@ÛB¦Mƒ©iW*Ûá¡ï dž³
EI Q
endstream 
endobj 

Below are the postscript and pdf files links for further demonstration. https://ufile.io/zmmjv https://ufile.io/2r2eb

Answer 1

The data in your hex string is not the same as the binary in the original PDF file. This leads to an error with the Flate decode filter. If I correct that, then there is no error.

Basically, you corrupted the data, so an error is entirely to be expected.

Note that you haven't started the file with a %! but you have inserted a %%LanguageLevel: 3 comment. I'm not sure what you think that's doing, but its pointless. Your program doesn't include a showpage, so it won't do anything useful either.