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#
# The Python Imaging Library.
# $Id$
#
# IM Tools support for PIL
#
# history:
# 1996-05-27 fl Created (read 8-bit images only)
# 2001-02-17 fl Use 're' instead of 'regex' (Python 2.1) (0.2)
#
# Copyright (c) Secret Labs AB 1997-2001.
# Copyright (c) Fredrik Lundh 1996-2001.
#
# See the README file for information on usage and redistribution.
#
import re
from . import Image, ImageFile
#
# --------------------------------------------------------------------
field = re.compile(br"([a-z]*) ([^ \r\n]*)")
##
# Image plugin for IM Tools images.
class ImtImageFile(ImageFile.ImageFile):
format = "IMT"
format_description = "IM Tools"
def _open(self):
# Quick rejection: if there's not a LF among the first
# 100 bytes, this is (probably) not a text header.
if b"\n" not in self.fp.read(100):
raise SyntaxError("not an IM file")
self.fp.seek(0)
xsize = ysize = 0
while True:
s = self.fp.read(1)
if not s:
break
if s == b"\x0C":
# image data begins
self.tile = [
("raw", (0, 0) + self.size, self.fp.tell(), (self.mode, 0, 1))
]
break
else:
# read key/value pair
# FIXME: dangerous, may read whole file
s = s + self.fp.readline()
if len(s) == 1 or len(s) > 100:
break
if s[0] == ord(b"*"):
continue # comment
m = field.match(s)
if not m:
break
k, v = m.group(1, 2)
if k == "width":
xsize = int(v)
self._size = xsize, ysize
elif k == "height":
ysize = int(v)
self._size = xsize, ysize
elif k == "pixel" and v == "n8":
self.mode = "L"
#
# --------------------------------------------------------------------
Image.register_open(ImtImageFile.format, ImtImageFile)
#
# no extension registered (".im" is simply too common)