问从命令行打印图像，并在Windows上等待打印作业完成

EN

[CmdletBinding()]
param (
    [string]    $file = $(throw "parameter is mandatory"),
    [string]    $printer = "EXACT PRINTER NAME HERE"
)

$ERR = "UserIntervention|Error|Jammed"

$status = (Get-Printer -Name $printer).PrinterStatus.ToString()
if ($status -match $ERR){ exit 1 }

# https://stackoverflow.com/a/20402656/17350905
# only sends the print job to the printer
rundll32 C:\Windows\System32\shimgvw.dll,ImageView_PrintTo $file $printer

# wait until printer is in printing status
do {
    $status = (Get-Printer -Name $printer).PrinterStatus.ToString()
    if ($status -match $ERR){ exit 1 }
    Start-Sleep -Milliseconds 100
} until ( $status -eq "Printing" )

# wait until printing is done
do {
    $status = (Get-Printer -Name $printer).PrinterStatus.ToString()
    if ($status -match $ERR){ exit 1 }
    Start-Sleep -Milliseconds 100
} until ( $status -eq "Normal" )

powershell -File "path\to\print.ps1" "C:\absolute\path\to\file.png"

- from the print dialog that opens then set up all the default options you want, like orientation, margins, paper type, etc etc for the specific printer you're gonna use.

- edit _monitoring frequency_ to _"only during print jobs"_. it should be _disabled_ by default
- in the next tab, modify _polling frequency_ to the minimum available, 100ms during print jobs (you can use a lower one for the _while not printing_ option

import time
import subprocess
from typing import List
try:
    import win32print as wprint

    PRINTERS: List[str] = [p[2] for p in wprint.EnumPrinters(wprint.PRINTER_ENUM_LOCAL)]
    PRINTER_DEFAULT = wprint.GetDefaultPrinter()
    WIN32_SUPPORTED = True
except:
    print("[!!] an error occured while retrieving printers")
    # you could throw an exception or whatever

# bla bla do other stuff
if "WIN32_SUPPORTED" in globals():
  __printImg_win32(file, printer_name)

def __printImg_win32(file: str, printer: str = ""):
    if not printer:
      printer = PRINTER_DEFAULT
    # verify prerequisites here

    # i still do prefer to print calling rundll32 directly,
    #  because of the default printer settings shenaningans
    #  and also because i've reliably used it to spool millions of jobs
    subprocess.check_call(
        [
            "C:\\Windows\\System32\\rundll32",
            "C:\\Windows\\System32\\shimgvw.dll,ImageView_PrintTo",
            file,
            printer,
        ]
    )
    __monitorJob_win32(printer)
    pass

def __monitorJob_win32(printer: str, timeout=16.0):
    p = wprint.OpenPrinter(printer)

    # wait for job to be sheduled
    t0 = time.time()
    while (time.time()-t0) < timeout:
        ptrr = wprint.GetPrinter(p, 2)
        # unsure about those flags, but definitively not errors.
        #  it seems they are "moving paper forward"
        if ptrr["Status"] != 0 and ptrr["Status"] not in [1024,1048576]:
            raise Error("Printer is in error (status %d)!" % ptrr["Status"])
        if ptrr["cJobs"] > 0:
            break
        time.sleep(0.1)
    else:
        raise Error("Printer timeout sheduling job!")

    # await job completion
    t0 = time.time()
    while (time.time()-t0) < timeout:
        ptrr = wprint.GetPrinter(p, 2)
        if ptrr["Status"] != 0 and ptrr["Status"] not in [1024,1048576]:
            raise Error("Printer is in error (status %d)!" % ptrr["Status"])
        if ptrr["cJobs"] == 0 and ptrr["Status"] == 0:
            break
        time.sleep(0.1)
    else:
        raise Error("Printer timeout waiting for completion!")

    wprint.ClosePrinter(p)
    return