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authorLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
committerLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
commit9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch)
tree0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py
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diff --git a/env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py b/env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py
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+#
+# The Python Imaging Library.
+# $Id$
+#
+# Basic McIdas support for PIL
+#
+# History:
+# 1997-05-05 fl Created (8-bit images only)
+# 2009-03-08 fl Added 16/32-bit support.
+#
+# Thanks to Richard Jones and Craig Swank for specs and samples.
+#
+# Copyright (c) Secret Labs AB 1997.
+# Copyright (c) Fredrik Lundh 1997.
+#
+# See the README file for information on usage and redistribution.
+#
+
+import struct
+
+from . import Image, ImageFile
+
+
+def _accept(s):
+ return s[:8] == b"\x00\x00\x00\x00\x00\x00\x00\x04"
+
+
+##
+# Image plugin for McIdas area images.
+
+
+class McIdasImageFile(ImageFile.ImageFile):
+
+ format = "MCIDAS"
+ format_description = "McIdas area file"
+
+ def _open(self):
+
+ # parse area file directory
+ s = self.fp.read(256)
+ if not _accept(s) or len(s) != 256:
+ raise SyntaxError("not an McIdas area file")
+
+ self.area_descriptor_raw = s
+ self.area_descriptor = w = [0] + list(struct.unpack("!64i", s))
+
+ # get mode
+ if w[11] == 1:
+ mode = rawmode = "L"
+ elif w[11] == 2:
+ # FIXME: add memory map support
+ mode = "I"
+ rawmode = "I;16B"
+ elif w[11] == 4:
+ # FIXME: add memory map support
+ mode = "I"
+ rawmode = "I;32B"
+ else:
+ raise SyntaxError("unsupported McIdas format")
+
+ self.mode = mode
+ self._size = w[10], w[9]
+
+ offset = w[34] + w[15]
+ stride = w[15] + w[10] * w[11] * w[14]
+
+ self.tile = [("raw", (0, 0) + self.size, offset, (rawmode, stride, 1))]
+
+
+# --------------------------------------------------------------------
+# registry
+
+Image.register_open(McIdasImageFile.format, McIdasImageFile, _accept)
+
+# no default extension