This file is indexed.

/usr/lib/python2.7/dist-packages/PIL/ImagePalette.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
#
# The Python Imaging Library.
# $Id$
#
# image palette object
#
# History:
# 1996-03-11 fl   Rewritten.
# 1997-01-03 fl   Up and running.
# 1997-08-23 fl   Added load hack
# 2001-04-16 fl   Fixed randint shadow bug in random()
#
# Copyright (c) 1997-2001 by Secret Labs AB
# Copyright (c) 1996-1997 by Fredrik Lundh
#
# See the README file for information on usage and redistribution.
#

import array
from PIL import Image, ImageColor


class ImagePalette:
    "Color palette for palette mapped images"

    def __init__(self, mode = "RGB", palette = None):
        self.mode = mode
        self.rawmode = None # if set, palette contains raw data
        self.palette = palette or list(range(256))*len(self.mode)
        self.colors = {}
        self.dirty = None
        if len(self.mode)*256 != len(self.palette):
            raise ValueError("wrong palette size")

    def getdata(self):
        """
        Get palette contents in format suitable # for the low-level
        ``im.putpalette`` primitive.

        .. warning:: This method is experimental.
        """
        if self.rawmode:
            return self.rawmode, self.palette
        return self.mode + ";L", self.tobytes()

    def tobytes(self):
        """Convert palette to bytes.

        .. warning:: This method is experimental.
        """
        if self.rawmode:
            raise ValueError("palette contains raw palette data")
        if isinstance(self.palette, bytes):
            return self.palette
        arr = array.array("B", self.palette)
        if hasattr(arr, 'tobytes'):
            #py3k has a tobytes, tostring is deprecated.
            return arr.tobytes()
        return arr.tostring()

    # Declare tostring as an alias for tobytes
    tostring = tobytes

    def getcolor(self, color):
        """Given an rgb tuple, allocate palette entry.

        .. warning:: This method is experimental.
        """
        if self.rawmode:
            raise ValueError("palette contains raw palette data")
        if isinstance(color, tuple):
            try:
                return self.colors[color]
            except KeyError:
                # allocate new color slot
                if isinstance(self.palette, bytes):
                    self.palette = [int(x) for x in self.palette]
                index = len(self.colors)
                if index >= 256:
                    raise ValueError("cannot allocate more than 256 colors")
                self.colors[color] = index
                self.palette[index] = color[0]
                self.palette[index+256] = color[1]
                self.palette[index+512] = color[2]
                self.dirty = 1
                return index
        else:
            raise ValueError("unknown color specifier: %r" % color)

    def save(self, fp):
        """Save palette to text file.

        .. warning:: This method is experimental.
        """
        if self.rawmode:
            raise ValueError("palette contains raw palette data")
        if isinstance(fp, str):
            fp = open(fp, "w")
        fp.write("# Palette\n")
        fp.write("# Mode: %s\n" % self.mode)
        for i in range(256):
            fp.write("%d" % i)
            for j in range(i, len(self.palette), 256):
                fp.write(" %d" % self.palette[j])
            fp.write("\n")
        fp.close()

# --------------------------------------------------------------------
# Internal

def raw(rawmode, data):
    palette = ImagePalette()
    palette.rawmode = rawmode
    palette.palette = data
    palette.dirty = 1
    return palette

# --------------------------------------------------------------------
# Factories

def _make_linear_lut(black, white):
    lut = []
    if black == 0:
        for i in range(256):
            lut.append(white*i//255)
    else:
        raise NotImplementedError # FIXME
    return lut

def _make_gamma_lut(exp, mode="RGB"):
    lut = []
    for i in range(256):
        lut.append(int(((i / 255.0) ** exp) * 255.0 + 0.5))
    return lut

def new(mode, data):
    return Image.core.new_palette(mode, data)

def negative(mode="RGB"):
    palette = list(range(256))
    palette.reverse()
    return ImagePalette(mode, palette * len(mode))

def random(mode="RGB"):
    from random import randint
    palette = []
    for i in range(256*len(mode)):
        palette.append(randint(0, 255))
    return ImagePalette(mode, palette)

def sepia(white="#fff0c0"):
    r, g, b = ImageColor.getrgb(white)
    r = _make_linear_lut(0, r)
    g = _make_linear_lut(0, g)
    b = _make_linear_lut(0, b)
    return ImagePalette("RGB", r + g + b)

def wedge(mode="RGB"):
    return ImagePalette(mode, list(range(256)) * len(mode))

def load(filename):

    # FIXME: supports GIMP gradients only

    fp = open(filename, "rb")

    lut = None

    if not lut:
        try:
            from PIL import GimpPaletteFile
            fp.seek(0)
            p = GimpPaletteFile.GimpPaletteFile(fp)
            lut = p.getpalette()
        except (SyntaxError, ValueError):
            #import traceback
            #traceback.print_exc()
            pass

    if not lut:
        try:
            from PIL import GimpGradientFile
            fp.seek(0)
            p = GimpGradientFile.GimpGradientFile(fp)
            lut = p.getpalette()
        except (SyntaxError, ValueError):
            #import traceback
            #traceback.print_exc()
            pass

    if not lut:
        try:
            from PIL import PaletteFile
            fp.seek(0)
            p = PaletteFile.PaletteFile(fp)
            lut = p.getpalette()
        except (SyntaxError, ValueError):
            import traceback
            traceback.print_exc()
            pass

    if not lut:
        raise IOError("cannot load palette")

    return lut # data, rawmode