90
« Last post by ekopta on October 28, 2021, 12:59:26 AM »
I've found the way to use PdfShellTools.dll with python, and here's the basic recipe. This doesn't format the text input to all the particular specifications PdhShellTools requires; it's just about getting it to the dll.
from ctypes import c_int, WINFUNCTYPE, WinDLL
from ctypes.wintypes import HWND, HINSTANCE, LPSTR
def setup():
"""Set dll up to run."""
DLLNAME = 'C:/Program Files (x86)/PDF-ShellTools/PDFShellTools.dll'
dll = WinDLL(DLLNAME)
prototype = WINFUNCTYPE(None, HWND, HINSTANCE, LPSTR, c_int)
paramflags = ((1, 'hwnd', 0), (1, 'hinst', 0), (1, 'IpszCmdLine', ""),
(1, 'nCmdShow', 0))
return (dll, prototype, paramflags)
def make_function(pdfstname, dll, prototype, paramflags):
"""Make a function to run PdfShellTools action from python."""
return prototype((pdfstname, dll), paramflags)
def run_dll_function(function, param, file):
"""Run function in dll. Format param & file nicely elsewhere."""
dllinput = param + " " + file
function(IpszCmdLine=LPSTR(dllinput.encode('utf-8')))
dll, prototype, paramflags = setup()
set_metadata = make_function('SetMetadata', dll, prototype, paramflags)
pdfstparams = '"Metadata=Title=SomeTitle"'
pdfstfiles = 'afile.pdf'
run_dll_function(set_metadata, pdfstparams, pdfstfiles)
My guess is that you only want to do the setup part once to realize the full speed gain. It's probably good to minimize the calls to make_function as well. I haven't looked into performance concerns yet.
Recent Posts
