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301 lines
15 KiB
301 lines
15 KiB
"""
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Source: http://barcode128.blogspot.com/2007/03/code128py.html
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This class generate code 128 (http://en.wikipedia.org/wiki/Code_128) bar code,
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it requires PIL (python imaging library) installed.
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This program is based on EanBarCode.py found on
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/426069 submitted by Remi Inconnu.
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Code 128 is variable lenght and a 103 module checksum is added automatically.
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Create bar code sample :
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from Code128 import Code128
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bar = Code128()
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bar.getImage("9782212110708",50,"gif")
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"""
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# courbB08.pil PIL Font file uuencoded
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courB08_pil ="""eJztl91rFkcUxp+Zt7vGFYzVtiJKICgYlLRWkaBBVGgDraFGCH5gsQp+QMBqabAVRYJYAlakCkoh
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CpYgxaLkIu1NvLBeSAStglpqL6xQAsVe2AuL5u2buH3mzGaYPf9AKWTl8d3nl7MzZ2bnazvea9+9
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7+PurFWut5e0Zu+s7VybYfKavP7LK3X/5TlM4Q3/OWbyf1ARD/6mgb2SjwtPhbpnq0iKZ6ahrmCj
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wqbxdgamRnHOA69jimN5zvIS8cDcUEeVdYzRAw1FHcJYXgPvG4s6Jlgj7xeEequS3wLeNvGvnrEO
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tq+Jt82szT+b86+WHlgS2jHGuHF6YHnog1zaupxqCcy3t4X3rVG9iXhgjW+bsFQ80BaxRDywTrF1
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VId6toPaqOI2UlsV20ptV2w7tUuxXVSXYl3UvoIZ9kFFPPBJ6D/HLD3QXbwjyDjI6YHPiz5FXiN7
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SQ8cDu/N9/1h3veEOP/Oe6gvQnmuvYYe+NL3qYyNVDxw2seF8XKa+jrKJREPnFdx56l+xfqpS4pd
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ogZUeQPU91FcKh64GveBeOCaKu8adUM9e4O6reJuU/cUu0c9VM8+pB6r/B5TI+rZEerPUpyhB/6K
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5lsqHniuyntO1VR5Nb5CU86FHqZOsTqqXrF66o2ojlQ8zDwVN4+aX86FHqYpXg9YLeevWRzPc7LF
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ZG+V1wN6mKXxvMzH6GFaJua5zGNLD7MqmtNcc+hh1oT1oCb5cf6aNj92mbPMGXqY9jCPasLaqQ1h
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jMv8pYfZpOI2UR9GcYl4mB1RnMtvB9me8N583B5qb3mNoIf5NGJc1+hhPvPrrjybioc5op49Qh0L
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dfj8jlHHQ3s9O059Fc3zRDzMmVKcpYfpU+3oI/umxJyH+TYqLxUPc0X13xVqMMovFQ8zpPIbon6M
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WCoeZljVMUz9VIqz9DAP1Dt6QP0a9gpZ7+lhHhXjysreaOhhfiv1vaGH+T2Mv5rbU+hh/uAaOnlN
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Xv+Hy4/7mtv3OW5hnpTODIYe5mm0xqbiYf4OcbLv08NU1ZyuuqKLOEvm6sjhJkd8TjRustgkrO3u
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vFGjh60r1uyiPHrY6eH84tb7l/SwM8vrAT3snHgNY9wcsoby+Y8edn5UxxTxsIuitrlcFpG9GcVx
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/6CHXRrKk72MHrYl3stYB/ceu7I4X02wlWSrCmaF1ehhV7NrovWKHrattI4betj20Fc8r7E87kf2
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g+gcy32BHnZDfKZmHPco2xnl4vqlk2yz6r/N1EfRPpiKh90d7VGpeNi9inGPst2lNdbSwx4McS8k
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7iDVE/Ytz3qoXsV6qZOKnaTOBDYqjPuRPRfOkz7uHNUf4uQMQg/7XekMYulhB6JnE/GwP0T1JuJh
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ryrGM6G9HuWSiIcdDnPmhTs70sPeCuPes1vUXcXuUvcDGxV2n/olOisn4mEfhfOVby/3KDsSlZeI
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h32iGOe0faoY57R9ptgzajTKJREPOx7aJnOfHhUbxov0Mz0qU8v50aMyo/wu6VGZrdhsqqH8fnll
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HEEz4zj6DNMxK+4X+gyv8cszyoU+4zfmjNAO9zuXrNGXF1gj2ULFFpI1K9ZMtiww//22jGwFXg39
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535XkK0O+cl5gz7Du6iP5wd9hvfDs9LP9BnWR/U6tp6sU7FOsi1RLo5tIdsWled+t5HtVO3YSdal
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WBfZftW2/WQHVH4HyA6F9+GfPUR2VOV3lKxXsV6yE4qdIDul2Cmys6ptZ8n6Qi7+m7OP7ELoU/8t
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dIHsoo8L+V0ku6xyvkw2qNgg2VBgvg+GyK6XyrP0GW5ydE3EuXd5k+xOeOdVibtD9jNm/Qv15O4i"""
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# courbB08.pbm font file uuencoded
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courB08_pbm ="""eJxNkntM01cUx8+P2/1apUAZEpECq4KRjKhF0E55FYEp4yG6mglz2Q8Q1BhERhhls/zKI+CID4wb
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IAPKpk4GAzqZPKKMX2GIUwGJG+ImtKwKjIzXcGuBtncV0Hn+uLnn5Nzv55xv7mdRkbusVjquBACr
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0N3B+wCQi/m+ijAf4LGl/wgAiwkNDpRIyyABSjGkBQ/fa3c1bfLs4U8ulDcYUs/502rTpIlO9pyc
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Kp/Buql6f3rmZ1NqvpO2SZXf0duY3j0563zjoZpW8AvHRmVeZ/Co36mFR8bERzlsxOMJ+oJshsS5
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7rlfzFzmnZFEFnIEZjTGizgLsLzjl4QtrNprBRu10e+u9GgePHjG63bPDw/H87uix0Vtsvkqg9qO
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lUimPLiOM4z69YfqIu5Pa2Sr/io6n9Xmf9e+57W1Iapo4lLQBdLSWc/z3KOSlgznDXTW/Flh21kX
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IeUIX8FZVL9dwP4NBH5jglYxkBNFmWgMcfsAxM/9gEL5TTwYpnfElR8qQ+WiCgeTHOAfb2bW/cQC
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/FozFOOQzAebtjRvQLI7HBtXvaZe25a3Q/1vZpPa+kd1XXKuflr5Cm48YUsUcjMXjsm/sf+22s6z
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QAbGZ8mEXMzSE4y9AHhRpltwB1N9ynz5H2MOi0MEi4E5O1ov9ogrFU5cMWAcdgQb3xHFtFK+0pkh
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VnYWxltx92j69p6jJ9OnHr+Cq5x5X6Mz70JcX2tEG5LIShM4EHIGoLIRsHzcvEuGwMYA4DZPn7gP
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MA1QIgltnt82cTu7j5n76mmz3TU5Bh3PFRTHku52aBgaTnJD7m1c0a3hNjbWWjBtMsP/OFac/LYA
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NAAWepdYodB58NBFIuOjNSQ4cgXplqP2RyOe8fd999T8weqBRwLwNFdQobHgA1/YTV8PH+TwV59v
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Bo7Y1J4rmHFv3T9e8rmmXdGSuPpSbBnhYJ7V8ICz6AfGcdTpRkpCUU8WcOT8wb+dSHIb6QZapx0M
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Y2DO4i7jYV2AUNkkErpQFHVYmFRmYD7OJhDyQSiow4IkrS3TbpQqFA9slE4jnj6peXMTC+N8buJ2
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0Uv5eOothuGIiluyCDtff3miBzJHjncOIC3bPT8FLabRPd0TCWy346Mmn9Rz23WyNMJcsnqhQani
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3CMFOZuYU7c20zTNVqNbGPNxALWnybeLEcTvXWpc10leI5ae/CI9qBqI686cnO6P6F33e2vAp0nz
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9+hnbNeueh/261UJK5aVeSf73ZSXA7dOBXvkXODEb9hVww4KtPNAbPvaZbi0q9kICCl+CiBJSzLv
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a8TlntYlC4UHvCRTlaXOy13VAbN0eae2v3hNesWXLsWPkjfOPq7e6zd1fOfc1TckDaylrvleinnT
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8Ui87ScLMVhhEx7SUJ8U2zKrRR2Z1dEqZlkr7kDTuhFjpkvse9ZXN0R9H+DlYA4TXVm6/kXDQMyT
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eGnJFXlLlSgva5iLUEcbiyDzNqf4Wr9kKYVUIcY40DrnsW4E4zW9QxnHVYx+bo64mIskDWjZgCrq
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eVQFrS7Sh/uFLftIidKWbgj6Oq652d4c3v88Dw2JDK7bSWX/ByuaLZI="""
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class Code128:
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CharSetA = {
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' ':0, '!':1, '"':2, '#':3, '$':4, '%':5, '&':6, "'":7,
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'(':8, ')':9, '*':10, '+':11, ',':12, '-':13, '.':14, '/':15,
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'0':16, '1':17, '2':18, '3':19, '4':20, '5':21, '6':22, '7':23,
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'8':24, '9':25, ':':26, ';':27, '<':28, '=':29, '>':30, '?':31,
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'@':32, 'A':33, 'B':34, 'C':35, 'D':36, 'E':37, 'F':38, 'G':39,
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'H':40, 'I':41, 'J':42, 'K':43, 'L':44, 'M':45, 'N':46, 'O':47,
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'P':48, 'Q':49, 'R':50, 'S':51, 'T':52, 'U':53, 'V':54, 'W':55,
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'X':56, 'Y':57, 'Z':58, '[':59, '\\':60, ']':61, '^':62, '_':63,
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'\x00':64, '\x01':65, '\x02':66, '\x03':67, '\x04':68, '\x05':69, '\x06':70, '\x07':71,
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'\x08':72, '\x09':73, '\x0A':74, '\x0B':75, '\x0C':76, '\x0D':77, '\x0E':78, '\x0F':79,
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'\x10':80, '\x11':81, '\x12':82, '\x13':83, '\x14':84, '\x15':85, '\x16':86, '\x17':87,
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'\x18':88, '\x19':89, '\x1A':90, '\x1B':91, '\x1C':92, '\x1D':93, '\x1E':94, '\x1F':95,
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'FNC3':96, 'FNC2':97, 'SHIFT':98, 'Code C':99, 'Code B':100, 'FNC4':101, 'FNC1':102, 'START A':103,
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'START B':104, 'START C':105, 'STOP':106
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}
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CharSetB = {
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' ':0, '!':1, '"':2, '#':3, '$':4, '%':5, '&':6, "'":7,
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'(':8, ')':9, '*':10, '+':11, ',':12, '-':13, '.':14, '/':15,
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'0':16, '1':17, '2':18, '3':19, '4':20, '5':21, '6':22, '7':23,
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'8':24, '9':25, ':':26, ';':27, '<':28, '=':29, '>':30, '?':31,
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'@':32, 'A':33, 'B':34, 'C':35, 'D':36, 'E':37, 'F':38, 'G':39,
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'H':40, 'I':41, 'J':42, 'K':43, 'L':44, 'M':45, 'N':46, 'O':47,
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'P':48, 'Q':49, 'R':50, 'S':51, 'T':52, 'U':53, 'V':54, 'W':55,
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'X':56, 'Y':57, 'Z':58, '[':59, '\\':60, ']':61, '^':62, '_':63,
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'' :64, 'a':65, 'b':66, 'c':67, 'd':68, 'e':69, 'f':70, 'g':71,
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'h':72, 'i':73, 'j':74, 'k':75, 'l':76, 'm':77, 'n':78, 'o':79,
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'p':80, 'q':81, 'r':82, 's':83, 't':84, 'u':85, 'v':86, 'w':87,
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'x':88, 'y':89, 'z':90, '{':91, '|':92, '}':93, '~':94, '\x7F':95,
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'FNC3':96, 'FNC2':97, 'SHIFT':98, 'Code C':99, 'FNC4':100, 'Code A':101, 'FNC1':102, 'START A':103,
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'START B':104, 'START C':105, 'STOP':106
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}
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CharSetC = {
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'00':0, '01':1, '02':2, '03':3, '04':4, '05':5, '06':6, '07':7,
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'08':8, '09':9, '10':10, '11':11, '12':12, '13':13, '14':14, '15':15,
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'16':16, '17':17, '18':18, '19':19, '20':20, '21':21, '22':22, '23':23,
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'24':24, '25':25, '26':26, '27':27, '28':28, '29':29, '30':30, '31':31,
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'32':32, '33':33, '34':34, '35':35, '36':36, '37':37, '38':38, '39':39,
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'40':40, '41':41, '42':42, '43':43, '44':44, '45':45, '46':46, '47':47,
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'48':48, '49':49, '50':50, '51':51, '52':52, '53':53, '54':54, '55':55,
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'56':56, '57':57, '58':58, '59':59, '60':60, '61':61, '62':62, '63':63,
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'64':64, '65':65, '66':66, '67':67, '68':68, '69':69, '70':70, '71':71,
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'72':72, '73':73, '74':74, '75':75, '76':76, '77':77, '78':78, '79':79,
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'80':80, '81':81, '82':82, '83':83, '84':84, '85':85, '86':86, '87':87,
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'88':88, '89':89, '90':90, '91':91, '92':92, '93':93, '94':94, '95':95,
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'96':96, '97':97, '98':98, '99':99, 'Code B':100, 'Code A':101, 'FNC1':102, 'START A':103,
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'START B':104, 'START C':105, 'STOP':106
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}
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ValueEncodings = { 0:'11011001100', 1:'11001101100', 2:'11001100110',
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3:'10010011000', 4:'10010001100', 5:'10001001100',
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6:'10011001000', 7:'10011000100', 8:'10001100100',
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9:'11001001000', 10:'11001000100', 11:'11000100100',
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12:'10110011100', 13:'10011011100', 14:'10011001110',
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15:'10111001100', 16:'10011101100', 17:'10011100110',
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18:'11001110010', 19:'11001011100', 20:'11001001110',
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21:'11011100100', 22:'11001110100', 23:'11101101110',
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24:'11101001100', 25:'11100101100', 26:'11100100110',
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27:'11101100100', 28:'11100110100', 29:'11100110010',
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30:'11011011000', 31:'11011000110', 32:'11000110110',
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33:'10100011000', 34:'10001011000', 35:'10001000110',
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36:'10110001000', 37:'10001101000', 38:'10001100010',
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39:'11010001000', 40:'11000101000', 41:'11000100010',
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42:'10110111000', 43:'10110001110', 44:'10001101110',
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45:'10111011000', 46:'10111000110', 47:'10001110110',
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48:'11101110110', 49:'11010001110', 50:'11000101110',
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51:'11011101000', 52:'11011100010', 53:'11011101110',
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54:'11101011000', 55:'11101000110', 56:'11100010110',
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57:'11101101000', 58:'11101100010', 59:'11100011010',
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60:'11101111010', 61:'11001000010', 62:'11110001010',
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63:'10100110000', 64:'10100001100', 65:'10010110000',
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66:'10010000110', 67:'10000101100', 68:'10000100110',
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69:'10110010000', 70:'10110000100', 71:'10011010000',
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72:'10011000010', 73:'10000110100', 74:'10000110010',
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75:'11000010010', 76:'11001010000', 77:'11110111010',
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78:'11000010100', 79:'10001111010', 80:'10100111100',
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81:'10010111100', 82:'10010011110', 83:'10111100100',
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84:'10011110100', 85:'10011110010', 86:'11110100100',
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87:'11110010100', 88:'11110010010', 89:'11011011110',
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90:'11011110110', 91:'11110110110', 92:'10101111000',
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93:'10100011110', 94:'10001011110', 95:'10111101000',
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96:'10111100010', 97:'11110101000', 98:'11110100010',
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99:'10111011110',100:'10111101110',101:'11101011110',
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102:'11110101110',103:'11010000100',104:'11010010000',
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105:'11010011100',106:'11000111010'
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}
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def makeCode(self, code):
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""" Create the binary code
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return a string which contains "0" for white bar, "1" for black bar """
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current_charset = None
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pos=sum=0
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skip=False
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for c in range(len(code)):
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if skip:
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skip=False
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continue
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#Only switch to char set C if next four chars are digits
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if len(code[c:]) >=4 and code[c:c+4].isdigit() and current_charset!=self.CharSetC or \
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len(code[c:]) >=2 and code[c:c+2].isdigit() and current_charset==self.CharSetC:
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#If char set C = current and next two chars ar digits, keep C
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if current_charset!=self.CharSetC:
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#Switching to Character set C
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if pos:
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strCode += self.ValueEncodings[current_charset['Code C']]
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sum += pos * current_charset['Code C']
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else:
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strCode= self.ValueEncodings[self.CharSetC['START C']]
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sum = self.CharSetC['START C']
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current_charset= self.CharSetC
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pos+=1
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elif self.CharSetB.has_key(code[c]) and current_charset!=self.CharSetB and \
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not(self.CharSetA.has_key(code[c]) and current_charset==self.CharSetA):
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#If char in chrset A = current, then just keep that
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# Switching to Character set B
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if pos:
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strCode += self.ValueEncodings[current_charset['Code B']]
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sum += pos * current_charset['Code B']
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else:
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strCode= self.ValueEncodings[self.CharSetB['START B']]
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sum = self.CharSetB['START B']
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current_charset= self.CharSetB
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pos+=1
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elif self.CharSetA.has_key(code[c]) and current_charset!=self.CharSetA and \
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not(self.CharSetB.has_key(code[c]) and current_charset==self.CharSetB):
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# if char in chrset B== current, then just keep that
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# Switching to Character set A
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if pos:
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strCode += self.ValueEncodings[current_charset['Code A']]
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sum += pos * current_charset['Code A']
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else:
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strCode += self.ValueEncodings[self.CharSetA['START A']]
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sum = self.CharSetA['START A']
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current_charset= self.CharSetA
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pos+=1
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if current_charset==self.CharSetC:
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val= self.CharSetC[code[c:c+2]]
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skip=True
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else:
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val=current_charset[code[c]]
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sum += pos * val
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strCode += self.ValueEncodings[val]
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pos+=1
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#Checksum
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checksum= sum % 103
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strCode += self.ValueEncodings[checksum]
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#The stop character
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strCode += self.ValueEncodings[current_charset['STOP']]
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#Termination bar
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strCode += "11"
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return strCode
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def getImage(self, value, height = 50, extension = "PNG"):
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""" Get an image with PIL library
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value code barre value
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height height in pixel of the bar code
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extension image file extension"""
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import Image, ImageFont, ImageDraw
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from string import lower, upper
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# Create a missing font file
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decodeFontFile(courB08_pil ,"courB08.pil")
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decodeFontFile(courB08_pbm ,"courB08.pbm")
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# Get the bar code list
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bits = self.makeCode(value)
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# Create a new image
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position = 8
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im = Image.new("1",(len(bits)+position,height))
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# Load font
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font = ImageFont.load("courB08.pil")
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# Create drawer
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draw = ImageDraw.Draw(im)
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# Erase image
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draw.rectangle(((0,0),(im.size[0],im.size[1])),fill=256)
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# Draw text
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draw.text((0, height-9), value, font=font, fill=0)
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# Draw the bar codes
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for bit in range(len(bits)):
|
|
if bits[bit] == '1':
|
|
draw.rectangle(((bit+position,0),(bit+position,height-10)),fill=0)
|
|
|
|
# Save the result image
|
|
im.save(value+"."+lower(extension), upper(extension))
|
|
|
|
|
|
def decodeFontFile(data, file):
|
|
""" Decode font file embedded in this script and create file """
|
|
from zlib import decompress
|
|
from base64 import decodestring
|
|
from os.path import exists
|
|
|
|
# If the font file is missing
|
|
if not exists(file):
|
|
# Write font file
|
|
open (file, "wb").write(decompress(decodestring(data)))
|
|
|
|
def testWithChecksum():
|
|
""" Test bar code with checksum """
|
|
bar = Code128()
|
|
assert(bar.makeCode('HI345678')=='11010010000110001010001100010001010111011110100010110001110001011011000010100100001001101100011101011')
|
|
|
|
def testImage():
|
|
""" Test images generation with PIL """
|
|
bar = Code128()
|
|
bar.getImage("9782212110708",50,"gif")
|
|
bar.getImage("978221211070",50,"png")
|
|
|
|
def test():
|
|
""" Execute all tests """
|
|
testWithChecksum()
|
|
testImage()
|
|
|
|
if __name__ == "__main__":
|
|
test()
|
|
|