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labelprint.py
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labelprint.py
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# -*- coding:utf8 -*-
# labelprint.py by Sammy Fung <[email protected]>
import logging, subprocess, re, os
from django.conf import settings
from PIL import Image, ImageDraw, ImageFont
from brother_ql.devicedependent import label_type_specs
from brother_ql.devicedependent import ENDLESS_LABEL, DIE_CUT_LABEL, ROUND_DIE_CUT_LABEL
from brother_ql import BrotherQLRaster, create_label
from brother_ql.backends import backend_factory, guess_backend
logger = logging.getLogger(__name__)
BACKEND_CLASS = None
BACKEND_STRING_DESCR = None
def get_label_context(first_name, last_name, company, default_label_size):
# For labels in English, it uses font 'Open Sans'.
# For labels in non-English, it assumes Traditional Chinese font is required,
# it uses font 'Noto Sans CJK TC'.
context = {
'first_name': first_name,
'last_name': last_name,
'name': "%s %s"%(first_name, last_name),
'company': company,
'font_size': int(90),
'company_font_size': int(40),
'font_family': 'Open Sans',
'font_style': 'Regular',
# 'font_family': ('Noto Sans CJK TC', 'Noto Sans CJK TC Medium'),
# 'font_style': ('Medium', 'Regular'),
'label_size': default_label_size,
'margin': int(10),
'threshold': int(70),
'align': 'center',
'orientation': 'standard',
'margin_top': float(24)/100.,
'margin_bottom': float(45)/100.,
'margin_left': float(35)/100.,
'margin_right': float(35)/100.,
}
context['margin_top'] = int(context['font_size']*context['margin_top'])
context['margin_bottom'] = int(context['font_size']*context['margin_bottom'])
context['margin_left'] = int(context['font_size']*context['margin_left'])
context['margin_right'] = int(context['font_size']*context['margin_right'])
def get_font_path(font_family, font_style):
try:
if font_family is None:
font_family = DEFAULT_FONT['family']
font_style = DEFAULT_FONT['style']
if font_style is None:
font_style = 'Regular'
font_path = FONTS[font_family][font_style]
except KeyError:
raise LookupError("Couln't find the font & style")
return font_path
context['font_path'] = get_font_path(context['font_family'], context['font_style'])
# Use Chinese font if first name is not starting with A-Z
if not(re.search('^[A-Za-z0-9,.()\-/ ]*$', last_name)):
context['name'] = "%s%s" % (first_name, last_name)
context['font_path'] = '/badgeprint/static/fonts/NotoSansCJKtc-Medium.otf'
if not(re.search('^[A-Za-z0-9,.()\-/ ]*$', first_name)):
context['name'] = "%s%s" % (last_name, first_name)
context['font_path'] = '/badgeprint/static/fonts/NotoSansCJKtc-Medium.otf'
if not (re.search('^[A-Za-z0-9,.()\-/ ]*$', company)):
context['font_path'] = '/badgeprint/static/fonts/NotoSansCJKtc-Medium.otf'
def get_label_dimensions(label_size):
try:
ls = label_type_specs[context['label_size']]
except KeyError:
raise LookupError("Unknown label_size")
return ls['dots_printable']
width, height = get_label_dimensions(context['label_size'])
if height > width: width, height = height, width
if context['orientation'] == 'rotated': height, width = width, height
context['width'], context['height'] = width, height
return context
# Brother Label DK-11209: 62x29 (696x271px)
def create_label_im_62x29(**kwargs):
label_type = label_type_specs[kwargs['label_size']]['kind']
kwargs['font_path'] = kwargs['font_path'][1:]
im_font = ImageFont.truetype(kwargs['font_path'], kwargs['font_size'])
company_font = ImageFont.truetype(kwargs['font_path'], kwargs['company_font_size'])
im = Image.new('L', (20, 20), 'white')
draw = ImageDraw.Draw(im)
company_textsize = draw.multiline_textsize(kwargs['company'], font=company_font)
textsize = draw.multiline_textsize(kwargs['name'], font=im_font)
# Label DK-11209 is 696x271px
if textsize[0] > 696:
kwargs['name'] = "%s\n%s"%(kwargs['first_name'], kwargs['last_name'])
textsize = draw.multiline_textsize(kwargs['name'], font=im_font)
width, height = kwargs['width'], kwargs['height']
if kwargs['orientation'] == 'standard':
if label_type in (ENDLESS_LABEL,):
height = textsize[1] + company_textsize[1] + kwargs['margin_top'] + kwargs['margin_bottom']
elif kwargs['orientation'] == 'rotated':
if label_type in (ENDLESS_LABEL,):
width = textsize[0] + company_textsize[0] + kwargs['margin_left'] + kwargs['margin_right']
im = Image.new('L', (width, height), 'white')
draw = ImageDraw.Draw(im)
if kwargs['orientation'] == 'standard':
if label_type in (DIE_CUT_LABEL, ROUND_DIE_CUT_LABEL):
vertical_offset = (height - textsize[1] - company_textsize[1] - 10)//2
vertical_offset += (kwargs['margin_top'] - kwargs['margin_bottom'])//2
else:
vertical_offset = kwargs['margin_top']
horizontal_offset = max((width - textsize[0])//2, 0)
elif kwargs['orientation'] == 'rotated':
vertical_offset = (height - textsize[1])//2
vertical_offset += (kwargs['margin_top'] - kwargs['margin_bottom'])//2
if label_type in (DIE_CUT_LABEL, ROUND_DIE_CUT_LABEL):
horizontal_offset = max((width - textsize[0])//2, 0)
else:
horizontal_offset = kwargs['margin_left']
offset = horizontal_offset, vertical_offset
draw.multiline_text(offset, kwargs['name'], (0), font=im_font, align=kwargs['align'])
company_vertical_offset = vertical_offset + textsize[1] + 20
company_horizontal_offset = max((width - company_textsize[0]) // 2, 0)
company_offset = company_horizontal_offset, company_vertical_offset
draw.multiline_text(company_offset, kwargs['company'], (0), font=company_font, align=kwargs['align'])
return im
# Brother Label DK-11202: 62x100 (696x1109px)
def create_label_im_62x100(**kwargs):
label_type = label_type_specs[kwargs['label_size']]['kind']
kwargs['font_path'] = kwargs['font_path'][1:]
kwargs['font_path'] = re.sub('"','', kwargs['font_path'])
im_font = ImageFont.truetype(kwargs['font_path'], kwargs['font_size'], encoding="utf-8")
company_font = ImageFont.truetype(kwargs['font_path'], kwargs['company_font_size'])
im = Image.new('L', (20, 20), 'white')
draw = ImageDraw.Draw(im)
company_textsize = draw.multiline_textsize(kwargs['company'], font=company_font)
textsize = draw.multiline_textsize(kwargs['name'], font=im_font)
# Label DK-11209 is 696x1109px
if textsize[0] > 696:
kwargs['name'] = "%s\n%s"%(kwargs['first_name'], kwargs['last_name'])
textsize = draw.multiline_textsize(kwargs['name'], font=im_font)
width, height = kwargs['width'], kwargs['height']
if kwargs['orientation'] == 'standard':
if label_type in (ENDLESS_LABEL,):
height = textsize[1] + company_textsize[1] + kwargs['margin_top'] + kwargs['margin_bottom']
elif kwargs['orientation'] == 'rotated':
if label_type in (ENDLESS_LABEL,):
width = textsize[0] + company_textsize[0] + kwargs['margin_left'] + kwargs['margin_right']
im = Image.new('L', (width, height), 'white')
draw = ImageDraw.Draw(im)
if kwargs['orientation'] == 'standard':
if label_type in (DIE_CUT_LABEL, ROUND_DIE_CUT_LABEL):
vertical_offset = (height - textsize[1] - company_textsize[1] - 10)//2
vertical_offset += (kwargs['margin_top'] - kwargs['margin_bottom'])//2
else:
vertical_offset = kwargs['margin_top']
horizontal_offset = max((width - textsize[0])//2, 0)
elif kwargs['orientation'] == 'rotated':
vertical_offset = (height - textsize[1])//2
vertical_offset += (kwargs['margin_top'] - kwargs['margin_bottom'])//2
if label_type in (DIE_CUT_LABEL, ROUND_DIE_CUT_LABEL):
horizontal_offset = max((width - textsize[0])//2, 0)
else:
horizontal_offset = kwargs['margin_left']
offset = horizontal_offset, vertical_offset
draw.multiline_text(offset, kwargs['name'], (0), font=im_font, align=kwargs['align'])
company_vertical_offset = vertical_offset + textsize[1] + 20
company_horizontal_offset = max((width - company_textsize[0]) // 2, 0)
company_offset = company_horizontal_offset, company_vertical_offset
draw.multiline_text(company_offset, kwargs['company'], (0), font=company_font, align=kwargs['align'])
draw.line((3, 10, width-3, 10), fill=0, width=3)
if re.search('^type-', kwargs['label_tpl']):
if re.search('^type-non-', kwargs['label_tpl']):
label_tpl = re.sub('^type-non-', '', kwargs['label_tpl'])
ticket_type = kwargs['ticket_type']
print("%s %s"%(label_tpl , ticket_type))
if label_tpl != ticket_type:
ticket_type = ticket_type.upper()
ticket_type_font = ImageFont.truetype(kwargs['font_path'], 60)
ticket_type_textsize = draw.multiline_textsize(ticket_type, font=ticket_type_font)
ticket_type_vertical_offset = height - ticket_type_textsize[1] - 20
ticket_type_horizontal_offset = max((width - ticket_type_textsize[0]) // 2, 0)
ticket_type_offset = ticket_type_horizontal_offset, ticket_type_vertical_offset
draw.multiline_text(ticket_type_offset, ticket_type, (0), font=ticket_type_font, align=kwargs['align'])
line_height = height - 20 - ticket_type_textsize[1]/2 + 8
draw.line((3, line_height, ticket_type_horizontal_offset-10, line_height), fill=0, width=3)
draw.line((ticket_type_horizontal_offset+ticket_type_textsize[0]+10, line_height, width-3, line_height), fill=0, width=3)
else:
draw.line((3, height-10, width-3, height-10),fill=0, width=3)
im.show()
else:
eventname_font = ImageFont.truetype(kwargs['font_path'], 26)
eventname = kwargs['event_name']
eventname_textsize = draw.multiline_textsize(eventname, font=eventname_font)
eventname_vertical_offset = height - eventname_textsize[1] - 20
eventname_horizontal_offset = max((width - eventname_textsize[0]) // 2, 0)
eventname_offset = eventname_horizontal_offset, eventname_vertical_offset
draw.multiline_text(eventname_offset, eventname, (0), font=eventname_font, align=kwargs['align'])
if kwargs['logo'] != None and kwargs['logo'] != '':
logo = Image.open(kwargs['logo'], 'r')
logo_width, logo_height = logo.size
logo_offset = int((width - logo_width)/2), 20
im.paste(logo, logo_offset)
return im
def print_text(**data):
global DEBUG, FONTS, DEFAULT_FONT, MODEL, BACKEND_CLASS, BACKEND_STRING_DESCR, DEFAULT_ORIENTATION, DEFAULT_LABEL_SIZE
BACKEND_STRING_DESCR = data['printer_uri'] # "tcp://192.168.0.10:9100"
font_folder = "./static/fonts"
selected_backend = guess_backend(BACKEND_STRING_DESCR)
BACKEND_CLASS = backend_factory(selected_backend)['backend_class']
MODEL = data['printer_model'] # "QL-720NW"
DEFAULT_LABEL_SIZE = data['label_size'] # "62x100"
DEFAULT_ORIENTATION = data['orientation'] # "rotated"
FONTS = get_fonts()
if font_folder:
FONTS.update(get_fonts(font_folder))
status = False
try:
context = get_label_context(data['first_name'], data['last_name'], data['company'], data['label_size'])
except LookupError as e:
return status
if context['name'] is None:
return status
if context['company'] is None:
context['company'] = ''
if context['last_name'] is None:
context['name'] = context['first_name']
context['event_name'] = data['event_name']
context['logo'] = data['logo']
context['label_tpl'] = data['label_tpl']
context['ticket_type'] = data['ticket_type']
im = eval('create_label_im_' + data['label_size'])(**context)
if data['debug']:
data['image'] = im
try:
im.save(settings.MEDIA_ROOT + '/cache/label-%s_%s.png'%(data['first_name'], data['last_name']))
except FileNotFoundError:
os.mkdir(settings.MEDIA_ROOT + '/cache')
im.save(settings.MEDIA_ROOT + '/cache/label-%s_%s.png'%(data['first_name'], data['last_name']))
else:
qlr = BrotherQLRaster(MODEL)
rotate = 0 if data['orientation'] == 'standard' else 90
if context['label_size'] == '62x29':
rotate = 0
create_label(qlr, im, context['label_size'], threshold=context['threshold'], cut=True, rotate=rotate)
try:
be = BACKEND_CLASS(BACKEND_STRING_DESCR)
be.write(qlr.data)
be.dispose()
del be
except Exception as e:
return status
status = True
return status
def get_fonts(folder=None):
"""
Scan a folder (or the system) for .ttf / .otf fonts and
return a dictionary of the structure family -> style -> file path
"""
fonts = {}
if folder:
cmd = ['fc-scan', '--format', '"%{file}:%{family}:style=%{style}\n"', folder]
else:
cmd = ['fc-list', ':', 'file', 'family', 'style']
for line in subprocess.check_output(cmd).decode('utf-8').split("\n"):
logger.debug(line)
line.strip()
if not line: continue
if 'otf' not in line and 'ttf' not in line: continue
parts = line.split(':')
path = parts[0]
families = parts[1].strip().split(',')
styles = parts[2].split('=')[1].split(',')
if len(families) == 1 and len(styles) > 1:
families = [families[0]] * len(styles)
elif len(families) > 1 and len(styles) == 1:
styles = [styles[0]] * len(families)
if len(families) != len(styles):
logger.debug("Problem with this font: " + line)
continue
for i in range(len(families)):
try: fonts[families[i]]
except: fonts[families[i]] = dict()
fonts[families[i]][styles[i]] = path
logger.debug("Added this font: " + str((families[i], styles[i], path)))
return fonts
def label_print():
global DEBUG, FONTS, DEFAULT_FONT, MODEL, BACKEND_CLASS, BACKEND_STRING_DESCR, DEFAULT_ORIENTATION, DEFAULT_LABEL_SIZE
printer = "tcp://192.168.11.106:9100"
model = "QL-720NW"
# Default label size is "62x100" (DK-11202) which use "rotated" in orientation.
# If label size in "62x29" (DK-11209), use "standard" in orientation.
default_label_size = "62x100"
default_orientation = "rotated"
font_folder = "./static/fonts"
selected_backend = guess_backend(printer)
BACKEND_CLASS = backend_factory(selected_backend)['backend_class']
BACKEND_STRING_DESCR = printer
MODEL = model
#if default_label_size not in label_sizes:
#parser.error("Invalid --default-label-size. Please choose on of the following:\n:" + " ".join(label_sizes))
DEFAULT_LABEL_SIZE = default_label_size
DEFAULT_ORIENTATION = default_orientation
FONTS = get_fonts()
if font_folder:
FONTS.update(get_fonts(font_folder))