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Zebra.py
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Zebra.py
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#!/usr/bin/env python3
import argparse
import sys
import os
import inspect
import re
import cups
import traceback
import zpl2
import wand
import wand.image
import wand.color
import math
class Zebra:
def __init__(self, argv):
self.argv = argv
self.progname = os.path.basename(self.argv[0])
# Get path of the directory where this file is stored
self.basePath = os.path.dirname(os.path.abspath(
inspect.getfile(inspect.currentframe())))
def cupsPrint(self, data):
if not isinstance(data, bytes):
raise TypeError
conn = cups.Connection()
job = conn.createJob(printer=self.args.printer,
title=self.progname, options={})
doc = conn.startDocument(printer=self.args.printer, job_id=job,
doc_name='', format=cups.CUPS_FORMAT_RAW, last_document=1)
conn.writeRequestData(data, len(data))
conn.finishDocument(printer=self.args.printer)
def parseArguments(self):
parser = argparse.ArgumentParser(
description='Zebra', prog=self.progname, formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("-v", "--version",
action="version",
help="show the version and exit",
version="0.1")
parser.add_argument('-P', '--printer',
help='specify CUPS printer name',
dest='printer',
default='zebra',
metavar='printer')
parser.add_argument('-q', '--quantity',
help='print quantity',
dest='quantity',
default=1,
type=int,
metavar='quantity')
parser.add_argument('--debug',
help='print debug information',
dest='debug',
action='store_true')
parser.add_argument('data',
help='data to print',
nargs='+',
metavar='data')
parser.add_argument('--dry-run',
help='do not print label, but show raw bytes instead',
dest='dryRun',
action='store_true')
parser.add_argument('--width',
help='label width',
dest='labelWidth',
metavar='width',
required=True)
parser.add_argument('--height',
help='label height',
dest='labelHeight',
metavar='width',
required=True)
parser.add_argument('--dpi',
help='printer DPI',
dest='dpi',
metavar='dpi',
default=300,
type=int)
parser.add_argument('--top',
help='label top offset',
dest='labelTop',
metavar='topoffset',
default=0,
type=int)
parser.add_argument('--darkness',
help='test printer darkness (0-30)',
dest='darkness',
metavar='darkness',
default=20,
type=int)
parser.add_argument('-t', '--type',
help='label type',
dest='type',
metavar='type',
required=True)
parser.add_argument('--grid',
help='show grid with spacing',
dest='gridSpacing',
metavar='spacing')
self.args = parser.parse_args(self.argv[1:])
def parseUnit(self, val):
if (isinstance(val, int)) or (isinstance(val, float)):
return val
matches = re.match(
'(?P<value>[+-]?([0-9]+)(\.([0-9]+)?)?)(?P<unit>in|mm|cm)?', val)
if matches:
parts = matches.groupdict()
newVal = float(parts['value'])
if (parts['unit'] == None):
pass
elif (parts['unit'] == 'in'):
newVal *= self.args.dpi
elif (parts['unit'] == 'cm'):
newVal *= self.args.dpi / 2.54
elif (parts['unit'] == 'mm'):
newVal *= self.args.dpi / 25.4
else:
raise Exception('Unit %s unknown!' % parts['unit'])
return newVal
raise Exception('Cannot parse %s' % val)
def addGrid(self, spacing=50):
for y in range(0, self.args.labelHeight + 1, spacing):
self.zpl.printBox(0, y, self.args.labelWidth, 1)
for x in range(0, self.args.labelWidth + 1, spacing):
self.zpl.printBox(x, 0, 1, self.args.labelHeight)
def labelTypeText(self):
# font dimensions
sizeLarge = 80
sizeSmall = 50
# text positions
fieldSpacing = 5
textPosX = 0
textHeightTotal = sizeLarge + \
(len(self.args.data) - 1) * (sizeSmall + fieldSpacing)
textPosYFirst = int((self.args.labelHeight - textHeightTotal) / 2)
offsetY = textPosYFirst
line = 0
for item in self.args.data:
self.zpl.printText(
x=textPosX,
y=offsetY,
width=self.args.labelWidth,
fontWidth=sizeLarge if line == 0 else sizeSmall,
fontHeight=sizeLarge if line == 0 else sizeSmall,
text=item,
textJustification='C')
offsetY += (sizeLarge if line ==
0 else sizeSmall) + fieldSpacing
line += 1
def labelTypeDHL(self):
with wand.image.Image(filename=self.args.data[0], resolution=int(self.args.dpi * 0.85)) as img:
img.background_color = wand.color.Color("white")
img.alpha_channel = 'remove'
img.rotate(90)
img.crop(
top=155,
left=1540,
width=self.args.labelWidth,
height=self.args.labelHeight)
bytesPerRow = math.ceil(img.width / 8)
binaryByteCount = bytesPerRow * img.height
graphicFieldCount = binaryByteCount
offsetX = int((self.args.labelWidth - img.width) / 2)
offsetY = int((self.args.labelHeight - img.height) / 2)
self.zpl.FieldOrigin(offsetX, offsetY)
if (self.args.debug):
img.save(filename='test.png')
rawImg = bytearray(img.make_blob(format='MONO'))
for i in range(0, len(rawImg)):
temp = 0
for j in range(0, 8):
if (rawImg[i] & (1 << j)):
temp |= (1 << (7 - j))
rawImg[i] = temp
self.zpl.GraphicField(compressionType='A',
binaryByteCount=binaryByteCount,
graphicFieldCount=graphicFieldCount,
bytesPerRow=bytesPerRow,
data=rawImg,
optimizeAscii=True)
self.zpl.FieldSeparator()
def labelTypeImage(self):
with wand.image.Image(filename=self.args.data[0], resolution=self.args.dpi) as img:
img.background_color = wand.color.Color("white")
img.alpha_channel = 'remove'
newWidth = min(img.width, self.args.labelWidth)
newHeight = min(img.height, self.args.labelHeight)
left = int((img.width - newWidth) / 2)
top = int((img.height - newHeight) / 2)
img.crop(
top=top,
left=left,
width=newWidth,
height=newHeight)
offsetX = int((self.args.labelWidth - img.width) / 2)
offsetY = int((self.args.labelHeight - img.height) / 2)
bytesPerRow = math.ceil(img.width / 8)
binaryByteCount = bytesPerRow * img.height
graphicFieldCount = binaryByteCount
self.zpl.FieldOrigin(offsetX, offsetY)
if (self.args.debug):
img.save(filename='test.png')
rawImg = bytearray(img.make_blob(format='MONO'))
for i in range(0, len(rawImg)):
temp = 0
for j in range(0, 8):
if (rawImg[i] & (1 << j)):
temp |= (1 << (7 - j))
rawImg[i] = temp
self.zpl.GraphicField(compressionType='A',
binaryByteCount=binaryByteCount,
graphicFieldCount=graphicFieldCount,
bytesPerRow=bytesPerRow,
data=rawImg,
optimizeAscii=True)
self.zpl.FieldSeparator()
def run(self):
try:
self.parseArguments()
self.zpl = zpl2.Zpl2(firmware='V45.11.7ZA')
# label data
self.args.labelWidth = int(self.parseUnit(self.args.labelWidth))
self.args.labelHeight = int(self.parseUnit(self.args.labelHeight))
self.zpl.StartFormat()
self.zpl.SetDarkness(self.args.darkness)
self.zpl.PrintWidth(self.args.labelWidth)
self.zpl.LabelLength(self.args.labelHeight)
self.zpl.LabelTop(self.args.labelTop)
self.zpl.ChangeInternationalFontEncoding('cp850')
if (self.args.type == 'text'):
self.labelTypeText()
elif (self.args.type == 'dhl'):
self.labelTypeDHL()
elif (self.args.type == 'image'):
self.labelTypeImage()
else:
return
# Grid
if (self.args.gridSpacing):
self.addGrid(spacing=int(self.args.gridSpacing))
self.zpl.EndFormat()
if (self.args.dryRun):
print(self.zpl.getAllBytes())
else:
singleData = self.zpl.getAllBytes()
allData = b"".join([singleData * self.args.quantity])
self.cupsPrint(allData)
except Exception as e:
if (self.args.debug):
traceback.print_exc()
if (len(e.args) > 0):
sys.exit(e.args[0])
else:
sys.exit("Unknown error: %s" % sys.exc_info()[0])
if __name__ == '__main__':
Zebra(sys.argv).run()