Install a font using python in Windows

Question

I am developing a python script to install a list of fonts in Windows. I have a list like this,

fonts_list = [\"/path/to/file/myFont1.ttf\", \"/path/to/file/         


        

Answer 1

Here's an install_font function to copy a font to the system Fonts folder, load it in the current session, notify running programs, and update the registry. It only depends on Python's standard library and should work in both Python 2 and 3.

ctypes definitions

import os
import shutil
import ctypes
from ctypes import wintypes

try:
    import winreg
except ImportError:
    import _winreg as winreg

user32 = ctypes.WinDLL('user32', use_last_error=True)
gdi32 = ctypes.WinDLL('gdi32', use_last_error=True)

FONTS_REG_PATH = r'Software\Microsoft\Windows NT\CurrentVersion\Fonts'

HWND_BROADCAST   = 0xFFFF
SMTO_ABORTIFHUNG = 0x0002
WM_FONTCHANGE    = 0x001D
GFRI_DESCRIPTION = 1
GFRI_ISTRUETYPE  = 3

if not hasattr(wintypes, 'LPDWORD'):
    wintypes.LPDWORD = ctypes.POINTER(wintypes.DWORD)

user32.SendMessageTimeoutW.restype = wintypes.LPVOID
user32.SendMessageTimeoutW.argtypes = (
    wintypes.HWND,   # hWnd
    wintypes.UINT,   # Msg
    wintypes.LPVOID, # wParam
    wintypes.LPVOID, # lParam
    wintypes.UINT,   # fuFlags
    wintypes.UINT,   # uTimeout
    wintypes.LPVOID) # lpdwResult

gdi32.AddFontResourceW.argtypes = (
    wintypes.LPCWSTR,) # lpszFilename

# http://www.undocprint.org/winspool/getfontresourceinfo
gdi32.GetFontResourceInfoW.argtypes = (
    wintypes.LPCWSTR, # lpszFilename
    wintypes.LPDWORD, # cbBuffer
    wintypes.LPVOID,  # lpBuffer
    wintypes.DWORD)   # dwQueryType

function definition

def install_font(src_path):
    # copy the font to the Windows Fonts folder
    dst_path = os.path.join(os.environ['SystemRoot'], 'Fonts',
                            os.path.basename(src_path))
    shutil.copy(src_path, dst_path)
    # load the font in the current session
    if not gdi32.AddFontResourceW(dst_path):
        os.remove(dst_path)
        raise WindowsError('AddFontResource failed to load "%s"' % src_path)
    # notify running programs
    user32.SendMessageTimeoutW(HWND_BROADCAST, WM_FONTCHANGE, 0, 0,
                               SMTO_ABORTIFHUNG, 1000, None)
    # store the fontname/filename in the registry
    filename = os.path.basename(dst_path)
    fontname = os.path.splitext(filename)[0]
    # try to get the font's real name
    cb = wintypes.DWORD()
    if gdi32.GetFontResourceInfoW(filename, ctypes.byref(cb), None,
                                  GFRI_DESCRIPTION):
        buf = (ctypes.c_wchar * cb.value)()
        if gdi32.GetFontResourceInfoW(filename, ctypes.byref(cb), buf,
                                      GFRI_DESCRIPTION):
            fontname = buf.value
    is_truetype = wintypes.BOOL()
    cb.value = ctypes.sizeof(is_truetype)
    gdi32.GetFontResourceInfoW(filename, ctypes.byref(cb),
        ctypes.byref(is_truetype), GFRI_ISTRUETYPE)
    if is_truetype:
        fontname += ' (TrueType)'
    with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, FONTS_REG_PATH, 0,
                        winreg.KEY_SET_VALUE) as key:
        winreg.SetValueEx(key, fontname, 0, winreg.REG_SZ, filename)