Davis Goglin
commit
5f97596224
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@ -1,2 +1,3 @@
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*.py[cod]
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.DS_Store
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build
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@ -0,0 +1,200 @@
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#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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"""A simple command-line interface for common python-escpos functionality
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Usage: python -m escpos.cli --help
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Dependencies:
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- DavisGoglin/python-escpos or better
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- A file named weather.png (for the 'test' subcommand)
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Reasons for using the DavisGoglin/python-escpos fork:
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- image() accepts a PIL.Image object rather than requiring me to choose
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between writing a temporary file to disk or calling a "private" method.
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- fullimage() allows me to print images of arbitrary length using slicing.
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How to print unsupported barcodes:
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barcode -b 'BARCODE' -e 'code39' -E | convert -density 200% eps:- code.png
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python test_escpos.py --images code.png
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Copyright (C) 2014 Stephan Sokolow (deitarion/SSokolow)
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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"""
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from __future__ import absolute_import
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__author__ = "Stephan Sokolow (deitarion/SSokolow)"
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__license__ = "MIT"
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import re
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from escpos import printer
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epson = printer.Usb(0x0416, 0x5011)
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# TODO: Un-hardcode this
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def _print_text_file(path):
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"""Print the given text file"""
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epson.set(align='left')
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with open(path, 'rU') as fobj:
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for line in fobj:
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epson.text(line)
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def _print_image_file(path):
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"""Print the given image file."""
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epson.fullimage(path, histeq=False, width=384)
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def print_files(args):
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"""The 'print' subcommand"""
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for path in args.paths:
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if args.images:
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_print_image_file(path)
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else:
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_print_text_file(path)
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epson.cut()
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# {{{ 'echo' Subcommand
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KNOWN_BARCODE_TYPES = ['UPC-A', 'UPC-E', 'EAN13', 'ITF']
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re_barcode_escape = re.compile(r'^%(?P<type>\S+)\s(?P<data>[0-9X]+)$')
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def echo(args): # pylint: disable=unused-argument
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"""TTY-like line-by-line keyboard-to-printer echo loop."""
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try:
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while True:
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line = raw_input()
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match = re_barcode_escape.match(line)
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if match and match.group('type') in KNOWN_BARCODE_TYPES:
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bctype, data = match.groups()
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epson.barcode(data, bctype, 48, 2, '', '')
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epson.set(align='left')
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else:
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epson.text('%s\n' % line)
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except KeyboardInterrupt:
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epson.cut()
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# }}}
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# {{{ 'test' Subcommand
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from PIL import Image, ImageDraw
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def _stall_test(width, height):
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"""Generate a pattern to detect print glitches due to vertical stalling."""
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img = Image.new('1', (width, height))
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for pos in [(x, y) for y in range(0, height) for x in range(0, width)]:
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img.putpixel(pos, not sum(pos) % 10)
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return img
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def _test_basic():
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"""The original test code from python-escpos's Usage wiki page"""
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epson.set(align='left')
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# Print text
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epson.text("TODO:\n") # pylint: disable=fixme
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epson.text("[ ] Task 1\n")
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epson.text("[ ] Task 2\n")
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# Print image
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# TODO: Bundle an image so this can be used
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# epson.image("weather.png")
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# Print QR Code (must have a white border to be scanned)
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epson.set(align='center')
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epson.text("Scan to recall TODO list") # pylint: disable=fixme
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epson.qr("http://www.example.com/")
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# Print barcode
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epson.barcode('1234567890128', 'EAN13', 32, 2, '', '')
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# Cut paper
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epson.cut()
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def _test_barcodes():
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"""Print test barcodes for all ESCPOS-specified formats."""
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for name, data in (
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# pylint: disable=bad-continuation
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('UPC-A', '123456789012\x00'),
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('UPC-E', '02345036\x00'),
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('EAN13', '1234567890128\x00'),
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('EAN8', '12345670\x00'),
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('CODE39', 'BARCODE12345678\x00'),
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('ITF', '123456\x00'),
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('CODABAR', 'A40156B'),
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# TODO: CODE93 and CODE128
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):
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# TODO: Fix the library to restore old alignment somehow
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epson.set(align='center')
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epson.text('\n%s\n' % name)
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epson.barcode(data, name, 64, 2, '', '')
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def _test_patterns(width=384, height=255):
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"""Print a set of test patterns for raster image output."""
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# Test our guess of the paper width
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img = Image.new('1', (width, height), color=1)
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draw = ImageDraw.Draw(img)
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draw.polygon(((0, 0), img.size, (0, img.size[1])), fill=0)
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epson.image(img)
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del draw, img
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# Test the consistency of printing large data and whether stall rate is
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# affected by data rate
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epson.image(_stall_test(width, height))
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epson.image(_stall_test(width / 2, height))
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def test(args):
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"""The 'test' subcommand"""
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if args.barcodes:
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_test_barcodes()
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elif args.patterns:
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_test_patterns()
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else:
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_test_basic()
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# }}}
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def main():
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"""Wrapped in a function for import and entry point compatibility"""
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# pylint: disable=bad-continuation
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import argparse
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parser = argparse.ArgumentParser(
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description="Command-line interface to python-escpos")
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subparsers = parser.add_subparsers(title='subcommands')
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echo_parser = subparsers.add_parser('echo', help='Echo the keyboard to '
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'the printer line-by-line (Exit with Ctrl+C)')
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echo_parser.set_defaults(func=echo)
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print_parser = subparsers.add_parser('print', help='Print the given files')
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print_parser.add_argument('--images', action='store_true',
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help="Provided files are images rather than text files.")
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print_parser.add_argument('paths', metavar='path', nargs='+')
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print_parser.set_defaults(func=print_files)
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test_parser = subparsers.add_parser('test', help='Print test patterns')
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test_modes = test_parser.add_mutually_exclusive_group()
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test_modes.add_argument('--barcodes', action='store_true',
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help="Test supported barcode types (Warning: Some printers must be "
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"reset after attempting an unsupported barcode type.)")
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test_modes.add_argument('--patterns', action='store_true',
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help="Print test patterns")
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test_parser.set_defaults(func=test)
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args = parser.parse_args()
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args.func(args)
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if __name__ == '__main__':
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main()
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# vim: set sw=4 sts=4 :
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""" ESC/POS Commands (Constants) """
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# Feed control sequences
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CTL_LF = '\x0a' # Print and line feed
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CTL_FF = '\x0c' # Form feed
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CTL_CR = '\x0d' # Carriage return
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CTL_HT = '\x09' # Horizontal tab
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CTL_VT = '\x0b' # Vertical tab
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# Printer hardware
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HW_INIT = '\x1b\x40' # Clear data in buffer and reset modes
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HW_SELECT = '\x1b\x3d\x01' # Printer select
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HW_RESET = '\x1b\x3f\x0a\x00' # Reset printer hardware
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# Cash Drawer
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CD_KICK_2 = '\x1b\x70\x00' # Sends a pulse to pin 2 []
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CD_KICK_5 = '\x1b\x70\x01' # Sends a pulse to pin 5 []
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# Paper
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PAPER_FULL_CUT = '\x1d\x56\x00' # Full cut paper
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PAPER_PART_CUT = '\x1d\x56\x01' # Partial cut paper
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# Text format
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TXT_NORMAL = '\x1b\x21\x00' # Normal text
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TXT_2HEIGHT = '\x1b\x21\x10' # Double height text
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TXT_2WIDTH = '\x1b\x21\x20' # Double width text
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TXT_4SQUARE = '\x1b\x21\x30' # Quad area text
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TXT_UNDERL_OFF = '\x1b\x2d\x00' # Underline font OFF
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TXT_UNDERL_ON = '\x1b\x2d\x01' # Underline font 1-dot ON
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TXT_UNDERL2_ON = '\x1b\x2d\x02' # Underline font 2-dot ON
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TXT_BOLD_OFF = '\x1b\x45\x00' # Bold font OFF
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TXT_BOLD_ON = '\x1b\x45\x01' # Bold font ON
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TXT_FONT_A = '\x1b\x4d\x00' # Font type A
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TXT_FONT_B = '\x1b\x4d\x01' # Font type B
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TXT_ALIGN_LT = '\x1b\x61\x00' # Left justification
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TXT_ALIGN_CT = '\x1b\x61\x01' # Centering
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TXT_ALIGN_RT = '\x1b\x61\x02' # Right justification
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# Barcode format
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BARCODE_TXT_OFF = '\x1d\x48\x00' # HRI barcode chars OFF
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BARCODE_TXT_ABV = '\x1d\x48\x01' # HRI barcode chars above
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BARCODE_TXT_BLW = '\x1d\x48\x02' # HRI barcode chars below
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BARCODE_TXT_BTH = '\x1d\x48\x03' # HRI barcode chars both above and below
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BARCODE_FONT_A = '\x1d\x66\x00' # Font type A for HRI barcode chars
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BARCODE_FONT_B = '\x1d\x66\x01' # Font type B for HRI barcode chars
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BARCODE_HEIGHT = '\x1d\x68\x64' # Barcode Height [1-255]
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BARCODE_WIDTH = '\x1d\x77\x03' # Barcode Width [2-6]
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BARCODE_UPC_A = '\x1d\x6b\x00' # Barcode type UPC-A
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BARCODE_UPC_E = '\x1d\x6b\x01' # Barcode type UPC-E
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BARCODE_EAN13 = '\x1d\x6b\x02' # Barcode type EAN13
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BARCODE_EAN8 = '\x1d\x6b\x03' # Barcode type EAN8
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BARCODE_CODE39 = '\x1d\x6b\x04' # Barcode type CODE39
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BARCODE_ITF = '\x1d\x6b\x05' # Barcode type ITF
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BARCODE_NW7 = '\x1d\x6b\x06' # Barcode type NW7
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# Image format
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S_RASTER_N = '\x1d\x76\x30\x00' # Set raster image normal size
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S_RASTER_2W = '\x1d\x76\x30\x01' # Set raster image double width
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S_RASTER_2H = '\x1d\x76\x30\x02' # Set raster image double height
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S_RASTER_Q = '\x1d\x76\x30\x03' # Set raster image quadruple
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#{ Control characters
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# as labelled in http://www.novopos.ch/client/EPSON/TM-T20/TM-T20_eng_qr.pdf
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NUL = '\x00'
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EOT = '\x04'
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ENQ = '\x05'
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DLE = '\x10'
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DC4 = '\x14'
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CAN = '\x18'
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ESC = '\x1b'
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FS = '\x1c'
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GS = '\x1d'
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#{ Feed control sequences
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CTL_LF = '\n' # Print and line feed
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CTL_FF = '\f' # Form feed
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CTL_CR = '\r' # Carriage return
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CTL_HT = '\t' # Horizontal tab
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CTL_VT = '\v' # Vertical tab
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#{ Printer hardware
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HW_INIT = ESC + '@' # Clear data in buffer and reset modes
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HW_SELECT = ESC + '=\x01' # Printer select
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HW_RESET = ESC + '\x3f\x0a\x00' # Reset printer hardware
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# (TODO: Where is this specified?)
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#{ Cash Drawer (ESC p <pin> <on time: 2*ms> <off time: 2*ms>)
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_CASH_DRAWER = lambda m, t1='', t2='': ESC + 'p' + m + chr(t1) + chr(t2)
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CD_KICK_2 = _CASH_DRAWER('\x00', 50, 50) # Sends a pulse to pin 2 []
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CD_KICK_5 = _CASH_DRAWER('\x01', 50, 50) # Sends a pulse to pin 5 []
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#{ Paper Cutter
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_CUT_PAPER = lambda m: GS + 'V' + m
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PAPER_FULL_CUT = _CUT_PAPER('\x00') # Full cut paper
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PAPER_PART_CUT = _CUT_PAPER('\x01') # Partial cut paper
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#{ Text format
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# TODO: Acquire the "ESC/POS Application Programming Guide for Paper Roll
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# Printers" and tidy up this stuff too.
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TXT_NORMAL = ESC + '!\x00' # Normal text
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TXT_2HEIGHT = ESC + '!\x10' # Double height text
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TXT_2WIDTH = ESC + '!\x20' # Double width text
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TXT_4SQUARE = ESC + '!\x30' # Quad area text
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TXT_UNDERL_OFF = ESC + '\x2d\x00' # Underline font OFF
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TXT_UNDERL_ON = ESC + '\x2d\x01' # Underline font 1-dot ON
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TXT_UNDERL2_ON = ESC + '\x2d\x02' # Underline font 2-dot ON
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TXT_BOLD_OFF = ESC + '\x45\x00' # Bold font OFF
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TXT_BOLD_ON = ESC + '\x45\x01' # Bold font ON
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TXT_FONT_A = ESC + '\x4d\x00' # Font type A
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TXT_FONT_B = ESC + '\x4d\x01' # Font type B
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TXT_ALIGN_LT = ESC + '\x61\x00' # Left justification
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TXT_ALIGN_CT = ESC + '\x61\x01' # Centering
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TXT_ALIGN_RT = ESC + '\x61\x02' # Right justification
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#{ Barcode format
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_SET_BARCODE_TXT_POS = lambda n: GS + 'H' + n
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BARCODE_TXT_OFF = _SET_BARCODE_TXT_POS('\x00') # HRI barcode chars OFF
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BARCODE_TXT_ABV = _SET_BARCODE_TXT_POS('\x01') # HRI barcode chars above
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BARCODE_TXT_BLW = _SET_BARCODE_TXT_POS('\x02') # HRI barcode chars below
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BARCODE_TXT_BTH = _SET_BARCODE_TXT_POS('\x03') # HRI both above and below
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_SET_HRI_FONT = lambda n: GS + 'f' + n
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BARCODE_FONT_A = _SET_HRI_FONT('\x00') # Font type A for HRI barcode chars
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BARCODE_FONT_B = _SET_HRI_FONT('\x01') # Font type B for HRI barcode chars
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BARCODE_HEIGHT = GS + 'h' # Barcode Height [1-255]
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BARCODE_WIDTH = GS + 'w' # Barcode Width [2-6]
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#NOTE: This isn't actually an ESC/POS command. It's the common prefix to the
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# two "print bar code" commands:
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# - "GS k <type as integer> <data> NUL"
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# - "GS k <type as letter> <data length> <data>"
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# The latter command supports more barcode types
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_SET_BARCODE_TYPE = lambda m: GS + 'k' + m
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BARCODE_UPC_A = _SET_BARCODE_TYPE('\x00') # Barcode type UPC-A
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BARCODE_UPC_E = _SET_BARCODE_TYPE('\x01') # Barcode type UPC-E
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BARCODE_EAN13 = _SET_BARCODE_TYPE('\x02') # Barcode type EAN13
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BARCODE_EAN8 = _SET_BARCODE_TYPE('\x03') # Barcode type EAN8
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BARCODE_CODE39 = _SET_BARCODE_TYPE('\x04') # Barcode type CODE39
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BARCODE_ITF = _SET_BARCODE_TYPE('\x05') # Barcode type ITF
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BARCODE_NW7 = _SET_BARCODE_TYPE('\x06') # Barcode type NW7
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#{ Image format
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# NOTE: _PRINT_RASTER_IMG is the obsolete ESC/POS "print raster bit image"
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# command. The constants include a fragment of the data's header.
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_PRINT_RASTER_IMG = lambda data: GS + 'v0' + data
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S_RASTER_N = _PRINT_RASTER_IMG('\x00') # Set raster image normal size
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S_RASTER_2W = _PRINT_RASTER_IMG('\x01') # Set raster image double width
|
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S_RASTER_2H = _PRINT_RASTER_IMG('\x02') # Set raster image double height
|
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S_RASTER_Q = _PRINT_RASTER_IMG('\x03') # Set raster image quadruple
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||||
|
|
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|||
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@ -53,7 +53,7 @@ class Escpos:
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buffer = ""
|
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cont = 0
|
||||
|
||||
def fullimage(self, img, max_height=860, width=512, histeq=True):
|
||||
def fullimage(self, img, max_height=860, width=512, histeq=True, bandsize=255):
|
||||
""" Resizes and prints an arbitrarily sized image """
|
||||
if isinstance(img, Image.Image):
|
||||
im = img.convert("RGB")
|
||||
|
|
@ -74,19 +74,21 @@ class Escpos:
|
|||
n = n + h[i+b]
|
||||
im = im.point(lut)
|
||||
|
||||
ratio = float(width) / im.size[0]
|
||||
newheight = int(ratio * im.size[1])
|
||||
if width:
|
||||
ratio = float(width) / im.size[0]
|
||||
newheight = int(ratio * im.size[1])
|
||||
|
||||
# Resize the image
|
||||
im = im.resize((width, newheight), Image.ANTIALIAS)
|
||||
if im.size[1] > max_height:
|
||||
# Resize the image
|
||||
im = im.resize((width, newheight), Image.ANTIALIAS)
|
||||
|
||||
if max_height and im.size[1] > max_height:
|
||||
im = im.crop((0, 0, im.size[0], max_height))
|
||||
|
||||
# Divide into bands
|
||||
bandsize = 255
|
||||
current = 0
|
||||
while current < im.size[1]:
|
||||
self.image(im.crop((0, current, width, min(im.size[1], current + bandsize))))
|
||||
self.image(im.crop((0, current, width or im.size[0],
|
||||
min(im.size[1], current + bandsize))))
|
||||
current += bandsize
|
||||
|
||||
|
||||
|
|
@ -143,28 +145,31 @@ class Escpos:
|
|||
|
||||
def qr(self, text):
|
||||
""" Print QR Code for the provided string """
|
||||
qr_code = qrcode.QRCode(version=4, box_size=4, border=1)
|
||||
qr_code = qrcode.QRCode(version=4, box_size=4, border=1, error_correction=qrcode.constants.ERROR_CORRECT_H)
|
||||
qr_code.add_data(text)
|
||||
qr_code.make(fit=True)
|
||||
qr_img = qr_code.make_image()
|
||||
# Convert the RGB image in printable image
|
||||
im = qr_img._img.convert("RGB")
|
||||
self.text('\n')
|
||||
self.set(align='center')
|
||||
self.image(im)
|
||||
self.text('\n')
|
||||
|
||||
def barcode(self, code, bc, width, height, pos, font):
|
||||
def barcode(self, code, bc, height, width, pos, font):
|
||||
""" Print Barcode """
|
||||
# Align Bar Code()
|
||||
self._raw(TXT_ALIGN_CT)
|
||||
# Height
|
||||
if height >=2 or height <=6:
|
||||
self._raw(BARCODE_HEIGHT)
|
||||
if 1 <= height <= 255:
|
||||
self._raw(BARCODE_HEIGHT + chr(height))
|
||||
else:
|
||||
raise BarcodeSizeError()
|
||||
raise BarcodeSizeError("height = %s" % height)
|
||||
# Width
|
||||
if width >= 1 or width <=255:
|
||||
self._raw(BARCODE_WIDTH)
|
||||
if 2 <= width <= 6:
|
||||
self._raw(BARCODE_WIDTH + chr(width))
|
||||
else:
|
||||
raise BarcodeSizeError()
|
||||
raise BarcodeSizeError("width = %s" % width)
|
||||
# Font
|
||||
if font.upper() == "B":
|
||||
self._raw(BARCODE_FONT_B)
|
||||
|
|
@ -192,10 +197,10 @@ class Escpos:
|
|||
self._raw(BARCODE_CODE39)
|
||||
elif bc.upper() == "ITF":
|
||||
self._raw(BARCODE_ITF)
|
||||
elif bc.upper() == "NW7":
|
||||
elif bc.upper() in ("NW7", "CODABAR"):
|
||||
self._raw(BARCODE_NW7)
|
||||
else:
|
||||
raise BarcodeTypeError()
|
||||
raise BarcodeTypeError(bc)
|
||||
# Print Code
|
||||
if code:
|
||||
self._raw(code)
|
||||
|
|
|
|||
|
|
@ -34,7 +34,7 @@ class BarcodeTypeError(Error):
|
|||
self.resultcode = 10
|
||||
|
||||
def __str__(self):
|
||||
return "No Barcode type is defined"
|
||||
return "No Barcode type is defined (%s)" % self.msg
|
||||
|
||||
class BarcodeSizeError(Error):
|
||||
def __init__(self, msg=""):
|
||||
|
|
@ -43,7 +43,7 @@ class BarcodeSizeError(Error):
|
|||
self.resultcode = 20
|
||||
|
||||
def __str__(self):
|
||||
return "Barcode size is out of range"
|
||||
return "Barcode size is out of range (%s)" % self.msg
|
||||
|
||||
class BarcodeCodeError(Error):
|
||||
def __init__(self, msg=""):
|
||||
|
|
|
|||
Loading…
Reference in New Issue