DCX is a simple extension of PCX image format allowing to bundle many PCX images (typically, pages of a document) in one file. It saw some limited use in DOS-era fax software, but was largely superseded with multi-page TIFFs and PDFs since then.
This page hosts a formal specification of .dcx file format using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.
The Python runtime library can be installed from PyPI:
python3 -m pip install kaitaistructParse a local file and get structure in memory:
data = PcxDcx.from_file("path/to/local/file.dcx")
Or parse structure from a bytes:
from kaitaistruct import KaitaiStream, BytesIO
raw = b"\x00\x01\x02..."
data = PcxDcx(KaitaiStream(BytesIO(raw)))
After that, one can get various attributes from the structure by invoking getter methods like:
data.magic # => get magic
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
import kaitaistruct
from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO
if getattr(kaitaistruct, 'API_VERSION', (0, 9)) < (0, 9):
raise Exception("Incompatible Kaitai Struct Python API: 0.9 or later is required, but you have %s" % (kaitaistruct.__version__))
import pcx
class PcxDcx(KaitaiStruct):
"""DCX is a simple extension of PCX image format allowing to bundle
many PCX images (typically, pages of a document) in one file. It saw
some limited use in DOS-era fax software, but was largely
superseded with multi-page TIFFs and PDFs since then.
"""
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.magic = self._io.read_bytes(4)
if not self.magic == b"\xB1\x68\xDE\x3A":
raise kaitaistruct.ValidationNotEqualError(b"\xB1\x68\xDE\x3A", self.magic, self._io, u"/seq/0")
self.files = []
i = 0
while True:
_ = PcxDcx.PcxOffset(self._io, self, self._root)
self.files.append(_)
if _.ofs_body == 0:
break
i += 1
class PcxOffset(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.ofs_body = self._io.read_u4le()
@property
def body(self):
if hasattr(self, '_m_body'):
return self._m_body
if self.ofs_body != 0:
_pos = self._io.pos()
self._io.seek(self.ofs_body)
self._m_body = pcx.Pcx(self._io)
self._io.seek(_pos)
return getattr(self, '_m_body', None)