Function _get_win32_installed_fonts

lib/matplotlib/font_manager.py:221–250

List the font paths known to the Windows registry.

()

def _get_win32_installed_fonts():
    """List the font paths known to the Windows registry."""
    import winreg
    items = set()
    # Search and resolve fonts listed in the registry.
    for domain, base_dirs in [
            (winreg.HKEY_LOCAL_MACHINE, [win32FontDirectory()]),  # System.
            (winreg.HKEY_CURRENT_USER, MSUserFontDirectories),  # User.
    ]:
        for base_dir in base_dirs:
            for reg_path in MSFontDirectories:
                try:
                    with winreg.OpenKey(domain, reg_path) as local:
                        for j in range(winreg.QueryInfoKey(local)[1]):
                            # value may contain the filename of the font or its
                            # absolute path.
                            key, value, tp = winreg.EnumValue(local, j)
                            if not isinstance(value, str):
                                continue
                            try:
                                # If value contains already an absolute path,
                                # then it is not changed further.
                                path = Path(base_dir, value).resolve()
                            except RuntimeError:
                                # Don't fail with invalid entries.
                                continue
                            items.add(path)
                except (OSError, MemoryError):
                    continue
    return items


@cache