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d50445ff30
Similar to the recent adoption of Black. isort is a Python utility to sort imports alphabetically and automatically separate into sections. By using isort, contributors can quickly and automatically conform to the projects style without thinking. Just let the tool do it. Uses the configuration recommended by the Black to avoid conflicts of style. Rewrite TestImageQt.test_deprecated to no rely on import order.
174 lines
4.3 KiB
Python
174 lines
4.3 KiB
Python
#
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# The Python Imaging Library
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# $Id$
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#
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# WMF stub codec
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#
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# history:
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# 1996-12-14 fl Created
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# 2004-02-22 fl Turned into a stub driver
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# 2004-02-23 fl Added EMF support
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#
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# Copyright (c) Secret Labs AB 1997-2004. All rights reserved.
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# Copyright (c) Fredrik Lundh 1996.
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#
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# See the README file for information on usage and redistribution.
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#
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# WMF/EMF reference documentation:
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# https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-WMF/[MS-WMF].pdf
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# http://wvware.sourceforge.net/caolan/index.html
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# http://wvware.sourceforge.net/caolan/ora-wmf.html
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from __future__ import print_function
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from . import Image, ImageFile
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from ._binary import i16le as word, i32le as dword, si16le as short, si32le as _long
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from ._util import py3
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# __version__ is deprecated and will be removed in a future version. Use
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# PIL.__version__ instead.
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__version__ = "0.2"
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_handler = None
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if py3:
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long = int
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def register_handler(handler):
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"""
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Install application-specific WMF image handler.
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:param handler: Handler object.
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"""
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global _handler
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_handler = handler
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if hasattr(Image.core, "drawwmf"):
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# install default handler (windows only)
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class WmfHandler(object):
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def open(self, im):
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im.mode = "RGB"
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self.bbox = im.info["wmf_bbox"]
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def load(self, im):
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im.fp.seek(0) # rewind
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return Image.frombytes(
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"RGB",
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im.size,
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Image.core.drawwmf(im.fp.read(), im.size, self.bbox),
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"raw",
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"BGR",
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(im.size[0] * 3 + 3) & -4,
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-1,
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)
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register_handler(WmfHandler())
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#
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# --------------------------------------------------------------------
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# Read WMF file
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def _accept(prefix):
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return (
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prefix[:6] == b"\xd7\xcd\xc6\x9a\x00\x00" or prefix[:4] == b"\x01\x00\x00\x00"
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)
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##
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# Image plugin for Windows metafiles.
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class WmfStubImageFile(ImageFile.StubImageFile):
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format = "WMF"
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format_description = "Windows Metafile"
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def _open(self):
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# check placable header
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s = self.fp.read(80)
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if s[:6] == b"\xd7\xcd\xc6\x9a\x00\x00":
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# placeable windows metafile
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# get units per inch
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inch = word(s, 14)
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# get bounding box
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x0 = short(s, 6)
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y0 = short(s, 8)
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x1 = short(s, 10)
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y1 = short(s, 12)
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# normalize size to 72 dots per inch
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size = (x1 - x0) * 72 // inch, (y1 - y0) * 72 // inch
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self.info["wmf_bbox"] = x0, y0, x1, y1
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self.info["dpi"] = 72
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# sanity check (standard metafile header)
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if s[22:26] != b"\x01\x00\t\x00":
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raise SyntaxError("Unsupported WMF file format")
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elif dword(s) == 1 and s[40:44] == b" EMF":
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# enhanced metafile
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# get bounding box
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x0 = _long(s, 8)
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y0 = _long(s, 12)
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x1 = _long(s, 16)
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y1 = _long(s, 20)
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# get frame (in 0.01 millimeter units)
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frame = _long(s, 24), _long(s, 28), _long(s, 32), _long(s, 36)
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# normalize size to 72 dots per inch
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size = x1 - x0, y1 - y0
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# calculate dots per inch from bbox and frame
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xdpi = int(2540.0 * (x1 - y0) / (frame[2] - frame[0]) + 0.5)
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ydpi = int(2540.0 * (y1 - y0) / (frame[3] - frame[1]) + 0.5)
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self.info["wmf_bbox"] = x0, y0, x1, y1
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if xdpi == ydpi:
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self.info["dpi"] = xdpi
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else:
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self.info["dpi"] = xdpi, ydpi
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else:
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raise SyntaxError("Unsupported file format")
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self.mode = "RGB"
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self._size = size
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loader = self._load()
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if loader:
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loader.open(self)
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def _load(self):
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return _handler
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def _save(im, fp, filename):
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if _handler is None or not hasattr(_handler, "save"):
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raise IOError("WMF save handler not installed")
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_handler.save(im, fp, filename)
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#
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# --------------------------------------------------------------------
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# Registry stuff
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Image.register_open(WmfStubImageFile.format, WmfStubImageFile, _accept)
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Image.register_save(WmfStubImageFile.format, _save)
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Image.register_extensions(WmfStubImageFile.format, [".wmf", ".emf"])
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