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projecten1/lib/python3.6/site-packages/PIL/ImtImagePlugin.py

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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
+
+__version__ = "0.2"
+
+
+#
+# --------------------------------------------------------------------
+
+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)