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author | Biswakalyan Bhuyan <biswa@surgot.in> | 2022-11-13 23:46:45 +0530 |
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committer | Biswakalyan Bhuyan <biswa@surgot.in> | 2022-11-13 23:46:45 +0530 |
commit | 9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch) | |
tree | 0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py | |
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id card generator
Diffstat (limited to 'env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py')
-rw-r--r-- | env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py b/env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py new file mode 100644 index 0000000..cd047fe --- /dev/null +++ b/env/lib/python3.10/site-packages/PIL/McIdasImagePlugin.py @@ -0,0 +1,75 @@ +# +# 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 |