"""
:mod:`pyffi.formats.kfm` --- NetImmerse/Gamebryo Keyframe Motion (.kfm)
=======================================================================
Implementation
--------------
.. autoclass:: KfmFormat
:show-inheritance:
:members:
Regression tests
----------------
Read a KFM file
^^^^^^^^^^^^^^^
>>> # read kfm file
>>> stream = open('tests/kfm/test.kfm', 'rb')
>>> data = KfmFormat.Data()
>>> data.inspect(stream)
>>> print(data.nif_file_name.decode("ascii"))
Test.nif
>>> data.read(stream)
>>> stream.close()
>>> # get all animation file names
>>> for anim in data.animations:
... print(anim.kf_file_name.decode("ascii"))
Test_MD_Idle.kf
Test_MD_Run.kf
Test_MD_Walk.kf
Test_MD_Die.kf
Parse all KFM files in a directory tree
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>> for stream, data in KfmFormat.walkData('tests/kfm'):
... print(stream.name)
tests/kfm/test.kfm
Create a KFM model from scratch and write to file
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>> data = KfmFormat.Data()
>>> data.nif_file_name = "Test.nif"
>>> data.num_animations = 4
>>> data.animations.update_size()
>>> data.animations[0].kf_file_name = "Test_MD_Idle.kf"
>>> data.animations[1].kf_file_name = "Test_MD_Run.kf"
>>> data.animations[2].kf_file_name = "Test_MD_Walk.kf"
>>> data.animations[3].kf_file_name = "Test_MD_Die.kf"
>>> from tempfile import TemporaryFile
>>> stream = TemporaryFile()
>>> data.write(stream)
>>> stream.close()
Get list of versions and games
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>> for vnum in sorted(KfmFormat.versions.values()):
... print('0x%08X' % vnum)
0x01000000
0x01024B00
0x0200000B
0x0201000B
0x0202000B
>>> for game, versions in sorted(KfmFormat.games.items(),
... key=lambda x: x[0]):
... print("%s " % game + " ".join('0x%08X' % vnum for vnum in versions))
Civilization IV 0x01000000 0x01024B00 0x0200000B
Emerge 0x0201000B 0x0202000B
Loki 0x01024B00
Megami Tensei: Imagine 0x0201000B
Oblivion 0x01024B00
Prison Tycoon 0x01024B00
Pro Cycling Manager 0x01024B00
Red Ocean 0x01024B00
Sid Meier's Railroads 0x0200000B
The Guild 2 0x01024B00
"""
# ***** BEGIN LICENSE BLOCK *****
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import struct, os, re
import pyffi.object_models.xml
import pyffi.object_models.common
from pyffi.object_models.xml.basic import BasicBase
from pyffi.utils.graph import EdgeFilter
import pyffi.object_models
import pyffi.object_models.xml.struct_
class KfmFormat(pyffi.object_models.xml.FileFormat):
"""This class implements the kfm file format."""
xml_file_name = 'kfm.xml'
# where to look for kfm.xml and in what order:
# KFMXMLPATH env var, or KfmFormat module directory
xml_file_path = [os.getenv('KFMXMLPATH'),
os.path.join(os.path.dirname(__file__), "kfmxml")]
# file name regular expression match
RE_FILENAME = re.compile(r'^.*\.kfm$', re.IGNORECASE)
# used for comparing floats
_EPSILON = 0.0001
# basic types
int = pyffi.object_models.common.Int
uint = pyffi.object_models.common.UInt
byte = pyffi.object_models.common.UByte # not a typo
char = pyffi.object_models.common.Char
short = pyffi.object_models.common.Short
ushort = pyffi.object_models.common.UShort
float = pyffi.object_models.common.Float
SizedString = pyffi.object_models.common.SizedString
TextString = pyffi.object_models.common.UndecodedData # for text (used by older kfm versions)
# implementation of kfm-specific basic types
class HeaderString(BasicBase):
"""The kfm header string."""
def __init__(self, **kwargs):
BasicBase.__init__(self, **kwargs)
self._doseol = False
def __str__(self):
return ';Gamebryo KFM File Version x.x.x.x'
def get_hash(self, **kwargs):
"""Return a hash value for this value.
:return: An immutable object that can be used as a hash.
"""
return None
def read(self, stream, **kwargs):
"""Read header string from stream and check it.
:param stream: The stream to read from.
:type stream: file
:keyword version: The file version.
:type version: int
"""
# get the string we expect
version_string = self.version_string(kwargs.get('version'))
# read string from stream
hdrstr = stream.read(len(version_string))
# check if the string is correct
if hdrstr != version_string.encode("ascii"):
raise ValueError(
"invalid KFM header: expected '%s' but got '%s'"
% (version_string, hdrstr))
# check eol style
nextchar = stream.read(1)
if nextchar == '\x0d'.encode("ascii"):
nextchar = stream.read(1)
self._doseol = True
else:
self._doseol = False
if nextchar != '\x0a'.encode("ascii"):
raise ValueError(
"invalid KFM header: string does not end on \\n or \\r\\n")
def write(self, stream, **kwargs):
"""Write the header string to stream.
:param stream: The stream to write to.
:type stream: file
"""
# write the version string
stream.write(self.version_string(kwargs.get('version')).encode("ascii"))
# write \n (or \r\n for older versions)
if self._doseol:
stream.write('\x0d\x0a'.encode("ascii"))
else:
stream.write('\x0a'.encode("ascii"))
def get_size(self, **kwargs):
"""Return number of bytes the header string occupies in a file.
:return: Number of bytes.
"""
return len(self.version_string(kwargs.get('version'))) \
+ (1 if not self._doseol else 2)
# DetailNode
def get_detail_display(self):
return str(self)
@staticmethod
def version_string(version):
"""Transforms version number into a version string.
:param version: The version number.
:type version: int
:return: A version string.
>>> KfmFormat.HeaderString.version_string(0x0202000b)
';Gamebryo KFM File Version 2.2.0.0b'
>>> KfmFormat.HeaderString.version_string(0x01024b00)
';Gamebryo KFM File Version 1.2.4b'
"""
if version == -1 or version is None:
raise RuntimeError('no string for version %s'%version)
return ";Gamebryo KFM File Version %s"%({
0x01000000 : "1.0",
0x01024b00 : "1.2.4b",
0x0200000b : "2.0.0.0b",
0x0201000b : "2.1.0.0b",
0x0202000b : "2.2.0.0b" } [version])
# other types with internal implementation
class FilePath(SizedString):
def get_hash(self, **kwargs):
"""Return a hash value for this value.
For file paths, the hash value is case insensitive.
:return: An immutable object that can be used as a hash.
"""
return self.get_value().lower()
@staticmethod
def version_number(version_str):
"""Converts version string into an integer.
:param version_str: The version string.
:type version_str: str
:return: A version integer.
>>> hex(KfmFormat.version_number('1.0'))
'0x1000000'
>>> hex(KfmFormat.version_number('1.2.4b'))
'0x1024b00'
>>> hex(KfmFormat.version_number('2.2.0.0b'))
'0x202000b'
"""
if not '.' in version_str:
return int(version_str)
try:
ver_list = [int(x, 16) for x in version_str.split('.')]
except ValueError:
# version not supported (i.e. version_str '10.0.1.3z' would
# trigger this)
return -1
if len(ver_list) > 4 or len(ver_list) < 1:
# version not supported
return -1
for ver_digit in ver_list:
if (ver_digit | 0xff) > 0xff:
return -1 # version not supported
while len(ver_list) < 4:
ver_list.append(0)
return ((ver_list[0] << 24)
+ (ver_list[1] << 16)
+ (ver_list[2] << 8)
+ ver_list[3])
class Header(pyffi.object_models.FileFormat.Data):
"""A class to contain the actual kfm data."""
version = 0x01024B00
def inspect(self, stream):
"""Quick heuristic check if stream contains KFM data,
by looking at the first 64 bytes. Sets version and reads
header string.
:param stream: The stream to inspect.
:type stream: file
"""
pos = stream.tell()
try:
hdrstr = stream.readline(64).rstrip()
finally:
stream.seek(pos)
if hdrstr.startswith(";Gamebryo KFM File Version ".encode("ascii")):
version_str = hdrstr[27:].decode("ascii")
else:
# not a kfm file
raise ValueError("Not a KFM file.")
try:
ver = KfmFormat.version_number(version_str)
except:
# version not supported
raise ValueError("KFM version not supported.")
if not ver in KfmFormat.versions.values():
# unsupported version
raise ValueError("KFM version not supported.")
# store version
self.version = ver
# read header string
try:
self._header_string_value_.read(stream, version=ver)
self._unknown_byte_value_.read(stream, version=ver)
self._nif_file_name_value_.read(stream, version=ver)
self._master_value_.read(stream, version=ver)
finally:
stream.seek(pos)
def read(self, stream):
"""Read a kfm file.
:param stream: The stream from which to read.
:type stream: ``file``
"""
# read the file
self.inspect(stream) # quick check
pyffi.object_models.xml.struct_.StructBase.read(
self, stream, version=self.version)
# check if we are at the end of the file
if stream.read(1):
raise ValueError('end of file not reached: corrupt kfm file?')
def write(self, stream):
"""Write a kfm file.
:param stream: The stream to which to write.
:type stream: ``file``
"""
# write the file
pyffi.object_models.xml.struct_.StructBase.write(
self, stream, version=self.version)
# GlobalNode
def get_global_child_nodes(self, edge_filter=EdgeFilter()):
return (anim for anim in self.animations)
def get_global_display(self):
"""Display the nif file name."""
return self.nif_file_name
class Animation:
# XXX this does not work yet (see todo for KfmFormat)
def get_detail_display(self):
"""Display the kf file name."""
return self.kf_file_name if not self.name else self.name
def get_global_display(self):
"""Display the kf file name."""
return self.kf_file_name if not self.name else self.name
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