How to get all installed font path? - windows

Question

How to get all installed font path with pywin32?
I can only find a way with registry key, but I would prefer to directly use GDI or DirectWrite.
Edit:
I am not sure, but from what I can see, here is how it would maybe be possible with GDI:
Create Factory: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-dwritecreatefactory
GetSystemFontCollection: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefactory-getsystemfontcollection
Do a for loop with GetFontFamilyCount: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefontcollection-getfontfamilycount
GetFontFamily: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefontcollection-getfontfamily
GetMatchingFonts (the param weight, stretch, style can be anything. These param seems to only change the order or the return list): https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefontfamily-getmatchingfonts
Do a for loop with GetFontCount:https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefontlist-getfontcount
GetFont: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefontlist-getfont
CreateFontFace: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefont-createfontface
GetFiles: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefontface-getfiles
GetReferenceKey: https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwritefontfile-getreferencekey
Again DWriteCreateFactory but with uuidof IDWriteLocalFontFileLoader
GetFilePathFromKey: https://learn.microsoft.com/en-us/windows/win32/directwrite/idwritelocalfontfileloader-getfilepathfromkey

Answer 1

I found an solution.
I used DirectWrite API.
This code depends on pyglet librairy.
import sys
import time
from ctypes import byref, c_uint32, create_unicode_buffer
from pyglet.font.directwrite import (
DWriteCreateFactory,
DWRITE_FACTORY_TYPE_ISOLATED,
IDWriteFactory,
IDWriteFont,
IDWriteFontCollection,
IDWriteFontFace,
IDWriteFontFamily,
IDWriteFontFile,
IDWriteFontFileLoader,
IDWriteLocalFontFileLoader,
IID_IDWriteFactory,
IID_IDWriteLocalFontFileLoader,
)
from pyglet.libs.win32.types import c_void_p
from typing import List
def get_fonts_filepath() -> List[str]:
"""
Return an list of all the font installed.
"""
write_factory = IDWriteFactory()
DWriteCreateFactory(
DWRITE_FACTORY_TYPE_ISOLATED, IID_IDWriteFactory, byref(write_factory)
)
fonts_path = set()
sys_collection = IDWriteFontCollection()
write_factory.GetSystemFontCollection(byref(sys_collection), 0)
collection_count = sys_collection.GetFontFamilyCount()
for i in range(collection_count):
family = IDWriteFontFamily()
sys_collection.GetFontFamily(i, byref(family))
font_count = family.GetFontCount()
for j in range(font_count):
font = IDWriteFont()
family.GetFont(j, byref(font))
font_face = IDWriteFontFace()
font.CreateFontFace(byref(font_face))
file_ct = c_uint32()
font_face.GetFiles(byref(file_ct), None)
font_files = (IDWriteFontFile * file_ct.value)()
font_face.GetFiles(byref(file_ct), font_files)
pff = font_files[0]
key_data = c_void_p()
ff_key_size = c_uint32()
pff.GetReferenceKey(byref(key_data), byref(ff_key_size))
loader = IDWriteFontFileLoader()
pff.GetLoader(byref(loader))
try:
local_loader = IDWriteLocalFontFileLoader()
loader.QueryInterface(
IID_IDWriteLocalFontFileLoader, byref(local_loader)
)
except OSError: # E_NOTIMPL
font.Release()
font_face.Release()
loader.Release()
pff.Release()
continue
path_len = c_uint32()
local_loader.GetFilePathLengthFromKey(
key_data, ff_key_size, byref(path_len)
)
buffer = create_unicode_buffer(path_len.value + 1)
local_loader.GetFilePathFromKey(key_data, ff_key_size, buffer, len(buffer))
font.Release()
font_face.Release()
loader.Release()
local_loader.Release()
pff.Release()
fonts_path.add(buffer.value)
family.Release()
sys_collection.Release()
write_factory.Release()
return list(fonts_path)
def main():
start = time.time()
fonts_path_dwrite = get_fonts_filepath()
print(time.time() - start)
print(fonts_path_dwrite)
if __name__ == "__main__":
sys.exit(main())