shimatta_kenkyushu_label_gen/shimatta_label/brother_ql_wrapper.py

import subprocess, os
from brother_ql.conversion import convert
from brother_ql.backends.helpers import send
from brother_ql.raster import BrotherQLRaster

class BrotherQlPrinter():

    backend = 'pyusb'

    def __init__(self, model='QL-810W', printer_connection='usb://0x04f9:0x209c', label_format='12', red_label=False, dpi_600=False):
        self.model = model
        self.printer = printer_connection
        self.label = label_format
        self.red_label = red_label
        self.dpi_600 = dpi_600

    def print_image(self, image, rotation='Auto', cut=True):
        qlr = BrotherQLRaster(self.model)
        qlr.exception_on_warning = True
        instructions = convert(qlr=qlr, 
            images = [image],
            label=self.label,
            rotate = str(rotation),
            threshold=70.0,
            dither = False,
            compress = False,
            red = self.red_label,
            dpi_600=self.dpi_600,
            hq = True,
            cut = cut
            )
        send(instructions=instructions, printer_identifier=self.printer, backend_identifier=self.backend, blocking=True)

def print_label(label):
    printer = BrotherQlPrinter(label_format=label.ql_format, red_label=label.red_label, dpi_600=label.dpi_600)
    printer.print_image(label.get_pillow_image(), rotation=label.ql_rotation, cut=True)

def print_labels(labels):
    
    printer = BrotherQlPrinter(label_format=labels[0].ql_format, red_label=labels[0].red_label, dpi_600=labels[0].dpi_600)
    for label in labels[:-1]:
        printer.print_image(label.get_pillow_image(), rotation=label.ql_rotation, cut=False)
    printer.print_image(labels[-1].get_pillow_image(), rotation=labels[-1].ql_rotation, cut=True)