Question

我有HP LJ P1005打印机，它是非PCL（基于主机）的打印机。它有一个专用的驱动程序link to the driver。支持PCL5的HP通用打印驱动程序（HP-UPD）不支持此功能。 A list of supported UPD printers

我的问题是我如何在这台打印机上使用PCL5转义序列，还是可以？这是否意味着如果基于主机的主机PC通过打印机驱动程序必须解释PCL5命令或PCL5根本不能使用？如何知道驱动程序是否与PCL兼容？如果主机PC必须解释PCL5，打印处理器设置应该是什么样的：RAW，IMF，EMF，winprint TEXT？

Answer 1

好吧，现在我知道我可以创建一个带有PCL转义序列的文本文件并将其解释并在非PCL基于主机的打印机上打印。

首先，我发现了here如何从pcl文件创建txt文件的方法。在Windows中创建PCL打印机之后，我使用外部程序GhostPCL，它是编译后的Ghostscript解释器，从pcl文件here创建一个PDF文件，如下所示：

gpcl6win32.exe -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=print.pdf print.pcl

dNOPAUSE和dBATCH用于静默且无交互转换。最后，我安装了gsviewer并从Python静默地将pdf打印到我的默认非PCL基于主机的打印机。我的所有PCL代码都被解释并打印到我的廉价打印机上。它在打印时不会打开任何窗口，这样对于客户来说似乎一切正常。

我不是程序员，所以代码不是你见过的最好的代码，但它有效：

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""
Autor: hrvooje
Last edit: June 2017

'pip install pypiwin32 --> for installing win32api'
In python 2: 'python -m pip install pypiwin32'
io module for io.open in Python2, the same as 'open' in Python3
First command line argument is for file name which we want to print:
'python print_rawpcl.py my_pcl_text_file.txt'
"""

import os, sys, io, win32print, win32api, subprocess


def remove_silently(file1):
    """Removing silently files from last time if there are any left"""
    try:
        os.remove(file1)
    except OSError:
        pass

# Asign your printers and variables
first_default_printer = win32print.GetDefaultPrinter()
tmp_printer = "local_pcl"
my_pcl_file = "print.pcl"
my_output_pdf = "print.pdf"

# Remove files if they already exist
remove_silently(my_output_pdf)
remove_silently(my_pcl_file)

# If there is command line argument, the first one is our file_to_print
if len(sys.argv) > 1:
    file_to_print = sys.argv[1]
else:
    file_to_print = "RACUN.TXT"

# Searching for supported PCL printers as default printer
pcl_supported = False
supported_printers = ["2035", "1320", "KONICA", "DIREKT"]
for item in supported_printers:
    if item.lower() in first_default_printer.lower():
        pcl_supported = True
        break
    else:
        is_supported = False

if pcl_supported == False:
        win32print.SetDefaultPrinter(tmp_printer)

# Printing RAW data to the virtual 'local_pcl' printer or to the 'HP LJ P2035'
try:
    # rb --> 'read, bytes', string is 'bytes' type, not unicode (Python3)
    with io.open(file_to_print, 'rb') as f:
        raw_data = f.read()
        hPrinter = win32print.OpenPrinter(win32print.GetDefaultPrinter())
        try:
            hJob = win32print.StartDocPrinter(hPrinter, 1, (
                    "print_rawpcl.py data", None, "RAW"))
            try:
                win32print.StartPagePrinter(hPrinter)
                win32print.WritePrinter(hPrinter, raw_data)
                win32print.EndPagePrinter(hPrinter)
            finally:
                win32print.EndDocPrinter(hPrinter)
        finally:
            win32print.ClosePrinter(hPrinter)
except OSError as e:
    print("Failed: {}".format(e))

# Convert a pcl file to pdf with GhostPCL (Ghostscript)
# if the default printer is local_pcl
converter_app = 'C:/Python34/ghostpcl-9.21-win32/gpcl6win32.exe'
if win32print.GetDefaultPrinter() == "local_pcl":
    subprocess.call(
        [converter_app, '-dNOPAUSE', '-dBATCH', '-sDEVICE=pdfwrite',
        '-sOutputFile=print.pdf', 'print.pcl'])

    # return default printer to the printer that was default at the start
    win32print.SetDefaultPrinter(first_default_printer)

    # Finally, print that print.pdf to your first default printer silently
    gsprint_app = "C:\\Program Files\\Ghostgum\\gsview\\gsprint.exe"
    p = subprocess.Popen(
            [gsprint_app, my_output_pdf], stdout=subprocess.PIPE,
            stderr=subprocess.PIPE)
    # Waits for the gs process to end
    stdout, stderr = p.communicate()
    # Remove print.pcl and print.pdf file
    remove_silently(my_output_pdf)
    remove_silently(my_pcl_file)

# Removes that first txt file
remove_silently(file_to_print)

我可以将PCL5转义序列打印到非PCL基于主机的打印机吗？

1 个答案: