This file is indexed.

/usr/lib/python2.7/dist-packages/PIL/BmpImagePlugin.py is in python-pil 2.3.0-1ubuntu3.4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
#
# The Python Imaging Library.
# $Id$
#
# BMP file handler
#
# Windows (and OS/2) native bitmap storage format.
#
# history:
# 1995-09-01 fl   Created
# 1996-04-30 fl   Added save
# 1997-08-27 fl   Fixed save of 1-bit images
# 1998-03-06 fl   Load P images as L where possible
# 1998-07-03 fl   Load P images as 1 where possible
# 1998-12-29 fl   Handle small palettes
# 2002-12-30 fl   Fixed load of 1-bit palette images
# 2003-04-21 fl   Fixed load of 1-bit monochrome images
# 2003-04-23 fl   Added limited support for BI_BITFIELDS compression
#
# Copyright (c) 1997-2003 by Secret Labs AB
# Copyright (c) 1995-2003 by Fredrik Lundh
#
# See the README file for information on usage and redistribution.
#


__version__ = "0.7"


from PIL import Image, ImageFile, ImagePalette, _binary

i8 = _binary.i8
i16 = _binary.i16le
i32 = _binary.i32le
o8 = _binary.o8
o16 = _binary.o16le
o32 = _binary.o32le

#
# --------------------------------------------------------------------
# Read BMP file

BIT2MODE = {
    # bits => mode, rawmode
    1: ("P", "P;1"),
    4: ("P", "P;4"),
    8: ("P", "P"),
    16: ("RGB", "BGR;15"),
    24: ("RGB", "BGR"),
    32: ("RGB", "BGRX")
}

def _accept(prefix):
    return prefix[:2] == b"BM"

##
# Image plugin for the Windows BMP format.

class BmpImageFile(ImageFile.ImageFile):

    format = "BMP"
    format_description = "Windows Bitmap"

    def _bitmap(self, header = 0, offset = 0):

        if header:
            self.fp.seek(header)

        read = self.fp.read

        # CORE/INFO
        s = read(4)
        s = s + ImageFile._safe_read(self.fp, i32(s)-4)

        if len(s) == 12:

            # OS/2 1.0 CORE
            bits = i16(s[10:])
            self.size = i16(s[4:]), i16(s[6:])
            compression = 0
            lutsize = 3
            colors = 0
            direction = -1

        elif len(s) in [40, 64]:

            # WIN 3.1 or OS/2 2.0 INFO
            bits = i16(s[14:])
            self.size = i32(s[4:]), i32(s[8:])
            compression = i32(s[16:])
            lutsize = 4
            colors = i32(s[32:])
            direction = -1
            if i8(s[11]) == 0xff:
                # upside-down storage
                self.size = self.size[0], 2**32 - self.size[1]
                direction = 0

        else:
            raise IOError("Unsupported BMP header type (%d)" % len(s))

        if not colors:
            colors = 1 << bits

        # MODE
        try:
            self.mode, rawmode = BIT2MODE[bits]
        except KeyError:
            raise IOError("Unsupported BMP pixel depth (%d)" % bits)

        if compression == 3:
            # BI_BITFIELDS compression
            mask = i32(read(4)), i32(read(4)), i32(read(4))
            if bits == 32 and mask == (0xff0000, 0x00ff00, 0x0000ff):
                rawmode = "BGRX"
            elif bits == 16 and mask == (0x00f800, 0x0007e0, 0x00001f):
                rawmode = "BGR;16"
            elif bits == 16 and mask == (0x007c00, 0x0003e0, 0x00001f):
                rawmode = "BGR;15"
            else:
                # print bits, map(hex, mask)
                raise IOError("Unsupported BMP bitfields layout")
        elif compression != 0:
            raise IOError("Unsupported BMP compression (%d)" % compression)

        # LUT
        if self.mode == "P":
            palette = []
            greyscale = 1
            if colors == 2:
                indices = (0, 255)
            else:
                indices = list(range(colors))
            for i in indices:
                rgb = read(lutsize)[:3]
                if rgb != o8(i)*3:
                    greyscale = 0
                palette.append(rgb)
            if greyscale:
                if colors == 2:
                    self.mode = rawmode = "1"
                else:
                    self.mode = rawmode = "L"
            else:
                self.mode = "P"
                self.palette = ImagePalette.raw(
                    "BGR", b"".join(palette)
                    )

        if not offset:
            offset = self.fp.tell()

        self.tile = [("raw",
                     (0, 0) + self.size,
                     offset,
                     (rawmode, ((self.size[0]*bits+31)>>3)&(~3), direction))]

        self.info["compression"] = compression

    def _open(self):

        # HEAD
        s = self.fp.read(14)
        if s[:2] != b"BM":
            raise SyntaxError("Not a BMP file")
        offset = i32(s[10:])

        self._bitmap(offset=offset)


class DibImageFile(BmpImageFile):

    format = "DIB"
    format_description = "Windows Bitmap"

    def _open(self):
        self._bitmap()

#
# --------------------------------------------------------------------
# Write BMP file

SAVE = {
    "1": ("1", 1, 2),
    "L": ("L", 8, 256),
    "P": ("P", 8, 256),
    "RGB": ("BGR", 24, 0),
}

def _save(im, fp, filename, check=0):

    try:
        rawmode, bits, colors = SAVE[im.mode]
    except KeyError:
        raise IOError("cannot write mode %s as BMP" % im.mode)

    if check:
        return check

    stride = ((im.size[0]*bits+7)//8+3)&(~3)
    header = 40 # or 64 for OS/2 version 2
    offset = 14 + header + colors * 4
    image  = stride * im.size[1]

    # bitmap header
    fp.write(b"BM" +                    # file type (magic)
             o32(offset+image) +        # file size
             o32(0) +                   # reserved
             o32(offset))               # image data offset

    # bitmap info header
    fp.write(o32(header) +              # info header size
             o32(im.size[0]) +          # width
             o32(im.size[1]) +          # height
             o16(1) +                   # planes
             o16(bits) +                # depth
             o32(0) +                   # compression (0=uncompressed)
             o32(image) +               # size of bitmap
             o32(1) + o32(1) +          # resolution
             o32(colors) +              # colors used
             o32(colors))               # colors important

    fp.write(b"\0" * (header - 40))    # padding (for OS/2 format)

    if im.mode == "1":
        for i in (0, 255):
            fp.write(o8(i) * 4)
    elif im.mode == "L":
        for i in range(256):
            fp.write(o8(i) * 4)
    elif im.mode == "P":
        fp.write(im.im.getpalette("RGB", "BGRX"))

    ImageFile._save(im, fp, [("raw", (0,0)+im.size, 0, (rawmode, stride, -1))])

#
# --------------------------------------------------------------------
# Registry

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

Image.register_extension(BmpImageFile.format, ".bmp")