Catalyst / admin/Synapse-Cortex 14.8 GB / 57.8 GB 40.0 GB free
Help Sign in

admin / Synapse-Cortex

public

Self Hosted ITSM Tool with RBAC/Tenanting and MFA

Code Issues Pull requests Pipelines Packages Security Insights Wiki Settings
Synapse-Cortex / synapse-cortex / .venv / Lib / site-packages / PIL / WmfImagePlugin.py 5390 B · main 
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
#
# The Python Imaging Library
# $Id$
#
# WMF stub codec
#
# history:
# 1996-12-14 fl   Created
# 2004-02-22 fl   Turned into a stub driver
# 2004-02-23 fl   Added EMF support
#
# Copyright (c) Secret Labs AB 1997-2004.  All rights reserved.
# Copyright (c) Fredrik Lundh 1996.
#
# See the README file for information on usage and redistribution.
#
# WMF/EMF reference documentation:
# https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-WMF/[MS-WMF].pdf
# http://wvware.sourceforge.net/caolan/index.html
# http://wvware.sourceforge.net/caolan/ora-wmf.html
from __future__ import annotations

from typing import IO

from . import Image, ImageFile
from ._binary import i16le as word
from ._binary import si16le as short
from ._binary import si32le as _long

_handler = None


def register_handler(handler: ImageFile.StubHandler | None) -> None:
    """
    Install application-specific WMF image handler.

    :param handler: Handler object.
    """
    global _handler
    _handler = handler


if hasattr(Image.core, "drawwmf"):
    # install default handler (windows only)

    class WmfHandler(ImageFile.StubHandler):
        def open(self, im: ImageFile.StubImageFile) -> None:
            self.bbox = im.info["wmf_bbox"]

        def load(self, im: ImageFile.StubImageFile) -> Image.Image:
            assert im.fp is not None
            im.fp.seek(0)  # rewind
            return Image.frombytes(
                "RGB",
                im.size,
                Image.core.drawwmf(im.fp.read(), im.size, self.bbox),
                "raw",
                "BGR",
                (im.size[0] * 3 + 3) & -4,
                -1,
            )

    register_handler(WmfHandler())

#
# --------------------------------------------------------------------
# Read WMF file


def _accept(prefix: bytes) -> bool:
    return prefix.startswith((b"\xd7\xcd\xc6\x9a\x00\x00", b"\x01\x00\x00\x00"))


##
# Image plugin for Windows metafiles.


class WmfStubImageFile(ImageFile.StubImageFile):
    format = "WMF"
    format_description = "Windows Metafile"

    def _open(self) -> None:
        # check placeable header
        assert self.fp is not None
        s = self.fp.read(44)

        if s.startswith(b"\xd7\xcd\xc6\x9a\x00\x00"):
            # placeable windows metafile

            # get units per inch
            inch = word(s, 14)
            if inch == 0:
                msg = "Invalid inch"
                raise ValueError(msg)
            self._inch: tuple[float, float] = inch, inch

            # get bounding box
            x0 = short(s, 6)
            y0 = short(s, 8)
            x1 = short(s, 10)
            y1 = short(s, 12)

            # normalize size to 72 dots per inch
            self.info["dpi"] = 72
            size = (
                (x1 - x0) * self.info["dpi"] // inch,
                (y1 - y0) * self.info["dpi"] // inch,
            )

            self.info["wmf_bbox"] = x0, y0, x1, y1

            # sanity check (standard metafile header)
            if s[22:26] != b"\x01\x00\t\x00":
                msg = "Unsupported WMF file format"
                raise SyntaxError(msg)

        elif s.startswith(b"\x01\x00\x00\x00") and s[40:44] == b" EMF":
            # enhanced metafile

            # get bounding box
            x0 = _long(s, 8)
            y0 = _long(s, 12)
            x1 = _long(s, 16)
            y1 = _long(s, 20)

            # get frame (in 0.01 millimeter units)
            frame = _long(s, 24), _long(s, 28), _long(s, 32), _long(s, 36)

            size = x1 - x0, y1 - y0

            # calculate dots per inch from bbox and frame
            xdpi = 2540.0 * (x1 - x0) / (frame[2] - frame[0])
            ydpi = 2540.0 * (y1 - y0) / (frame[3] - frame[1])

            self.info["wmf_bbox"] = x0, y0, x1, y1

            if xdpi == ydpi:
                self.info["dpi"] = xdpi
            else:
                self.info["dpi"] = xdpi, ydpi
            self._inch = xdpi, ydpi

        else:
            msg = "Unsupported file format"
            raise SyntaxError(msg)

        self._mode = "RGB"
        self._size = size

    def _load(self) -> ImageFile.StubHandler | None:
        return _handler

    def load(
        self, dpi: float | tuple[float, float] | None = None
    ) -> Image.core.PixelAccess | None:
        if dpi is not None:
            self.info["dpi"] = dpi
            x0, y0, x1, y1 = self.info["wmf_bbox"]
            if not isinstance(dpi, tuple):
                dpi = dpi, dpi
            self._size = (
                int((x1 - x0) * dpi[0] / self._inch[0]),
                int((y1 - y0) * dpi[1] / self._inch[1]),
            )
        return super().load()


def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
    if _handler is None or not hasattr(_handler, "save"):
        msg = "WMF save handler not installed"
        raise OSError(msg)
    _handler.save(im, fp, filename)


#
# --------------------------------------------------------------------
# Registry stuff


Image.register_open(WmfStubImageFile.format, WmfStubImageFile, _accept)
Image.register_save(WmfStubImageFile.format, _save)

Image.register_extensions(WmfStubImageFile.format, [".wmf", ".emf"])