This file is indexed.

/usr/lib/python3/dist-packages/PIL/IcnsImagePlugin.py is in python3-pil 3.1.2-0ubuntu1.

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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
#
# The Python Imaging Library.
# $Id$
#
# Mac OS X icns file decoder, based on icns.py by Bob Ippolito.
#
# history:
# 2004-10-09 fl   Turned into a PIL plugin; removed 2.3 dependencies.
#
# Copyright (c) 2004 by Bob Ippolito.
# Copyright (c) 2004 by Secret Labs.
# Copyright (c) 2004 by Fredrik Lundh.
# Copyright (c) 2014 by Alastair Houghton.
#
# See the README file for information on usage and redistribution.
#

from PIL import Image, ImageFile, PngImagePlugin, _binary
import io
import os
import shutil
import struct
import sys
import tempfile

enable_jpeg2k = hasattr(Image.core, 'jp2klib_version')
if enable_jpeg2k:
    from PIL import Jpeg2KImagePlugin

i8 = _binary.i8

HEADERSIZE = 8


def nextheader(fobj):
    return struct.unpack('>4sI', fobj.read(HEADERSIZE))


def read_32t(fobj, start_length, size):
    # The 128x128 icon seems to have an extra header for some reason.
    (start, length) = start_length
    fobj.seek(start)
    sig = fobj.read(4)
    if sig != b'\x00\x00\x00\x00':
        raise SyntaxError('Unknown signature, expecting 0x00000000')
    return read_32(fobj, (start + 4, length - 4), size)


def read_32(fobj, start_length, size):
    """
    Read a 32bit RGB icon resource.  Seems to be either uncompressed or
    an RLE packbits-like scheme.
    """
    (start, length) = start_length
    fobj.seek(start)
    pixel_size = (size[0] * size[2], size[1] * size[2])
    sizesq = pixel_size[0] * pixel_size[1]
    if length == sizesq * 3:
        # uncompressed ("RGBRGBGB")
        indata = fobj.read(length)
        im = Image.frombuffer("RGB", pixel_size, indata, "raw", "RGB", 0, 1)
    else:
        # decode image
        im = Image.new("RGB", pixel_size, None)
        for band_ix in range(3):
            data = []
            bytesleft = sizesq
            while bytesleft > 0:
                byte = fobj.read(1)
                if not byte:
                    break
                byte = i8(byte)
                if byte & 0x80:
                    blocksize = byte - 125
                    byte = fobj.read(1)
                    for i in range(blocksize):
                        data.append(byte)
                else:
                    blocksize = byte + 1
                    data.append(fobj.read(blocksize))
                bytesleft -= blocksize
                if bytesleft <= 0:
                    break
            if bytesleft != 0:
                raise SyntaxError(
                    "Error reading channel [%r left]" % bytesleft
                    )
            band = Image.frombuffer(
                "L", pixel_size, b"".join(data), "raw", "L", 0, 1
                )
            im.im.putband(band.im, band_ix)
    return {"RGB": im}


def read_mk(fobj, start_length, size):
    # Alpha masks seem to be uncompressed
    start = start_length[0]
    fobj.seek(start)
    pixel_size = (size[0] * size[2], size[1] * size[2])
    sizesq = pixel_size[0] * pixel_size[1]
    band = Image.frombuffer(
        "L", pixel_size, fobj.read(sizesq), "raw", "L", 0, 1
        )
    return {"A": band}


def read_png_or_jpeg2000(fobj, start_length, size):
    (start, length) = start_length
    fobj.seek(start)
    sig = fobj.read(12)
    if sig[:8] == b'\x89PNG\x0d\x0a\x1a\x0a':
        fobj.seek(start)
        im = PngImagePlugin.PngImageFile(fobj)
        return {"RGBA": im}
    elif sig[:4] == b'\xff\x4f\xff\x51' \
            or sig[:4] == b'\x0d\x0a\x87\x0a' \
            or sig == b'\x00\x00\x00\x0cjP  \x0d\x0a\x87\x0a':
        if not enable_jpeg2k:
            raise ValueError('Unsupported icon subimage format (rebuild PIL '
                             'with JPEG 2000 support to fix this)')
        # j2k, jpc or j2c
        fobj.seek(start)
        jp2kstream = fobj.read(length)
        f = io.BytesIO(jp2kstream)
        im = Jpeg2KImagePlugin.Jpeg2KImageFile(f)
        if im.mode != 'RGBA':
            im = im.convert('RGBA')
        return {"RGBA": im}
    else:
        raise ValueError('Unsupported icon subimage format')


class IcnsFile(object):

    SIZES = {
        (512, 512, 2): [
            (b'ic10', read_png_or_jpeg2000),
        ],
        (512, 512, 1): [
            (b'ic09', read_png_or_jpeg2000),
        ],
        (256, 256, 2): [
            (b'ic14', read_png_or_jpeg2000),
        ],
        (256, 256, 1): [
            (b'ic08', read_png_or_jpeg2000),
        ],
        (128, 128, 2): [
            (b'ic13', read_png_or_jpeg2000),
        ],
        (128, 128, 1): [
            (b'ic07', read_png_or_jpeg2000),
            (b'it32', read_32t),
            (b't8mk', read_mk),
        ],
        (64, 64, 1): [
            (b'icp6', read_png_or_jpeg2000),
        ],
        (32, 32, 2): [
            (b'ic12', read_png_or_jpeg2000),
        ],
        (48, 48, 1): [
            (b'ih32', read_32),
            (b'h8mk', read_mk),
        ],
        (32, 32, 1): [
            (b'icp5', read_png_or_jpeg2000),
            (b'il32', read_32),
            (b'l8mk', read_mk),
        ],
        (16, 16, 2): [
            (b'ic11', read_png_or_jpeg2000),
        ],
        (16, 16, 1): [
            (b'icp4', read_png_or_jpeg2000),
            (b'is32', read_32),
            (b's8mk', read_mk),
        ],
    }

    def __init__(self, fobj):
        """
        fobj is a file-like object as an icns resource
        """
        # signature : (start, length)
        self.dct = dct = {}
        self.fobj = fobj
        sig, filesize = nextheader(fobj)
        if sig != b'icns':
            raise SyntaxError('not an icns file')
        i = HEADERSIZE
        while i < filesize:
            sig, blocksize = nextheader(fobj)
            if blocksize <= 0:
                raise SyntaxError('invalid block header')
            i += HEADERSIZE
            blocksize -= HEADERSIZE
            dct[sig] = (i, blocksize)
            fobj.seek(blocksize, 1)
            i += blocksize

    def itersizes(self):
        sizes = []
        for size, fmts in self.SIZES.items():
            for (fmt, reader) in fmts:
                if fmt in self.dct:
                    sizes.append(size)
                    break
        return sizes

    def bestsize(self):
        sizes = self.itersizes()
        if not sizes:
            raise SyntaxError("No 32bit icon resources found")
        return max(sizes)

    def dataforsize(self, size):
        """
        Get an icon resource as {channel: array}.  Note that
        the arrays are bottom-up like windows bitmaps and will likely
        need to be flipped or transposed in some way.
        """
        dct = {}
        for code, reader in self.SIZES[size]:
            desc = self.dct.get(code)
            if desc is not None:
                dct.update(reader(self.fobj, desc, size))
        return dct

    def getimage(self, size=None):
        if size is None:
            size = self.bestsize()
        if len(size) == 2:
            size = (size[0], size[1], 1)
        channels = self.dataforsize(size)

        im = channels.get('RGBA', None)
        if im:
            return im

        im = channels.get("RGB").copy()
        try:
            im.putalpha(channels["A"])
        except KeyError:
            pass
        return im


##
# Image plugin for Mac OS icons.

class IcnsImageFile(ImageFile.ImageFile):
    """
    PIL image support for Mac OS .icns files.
    Chooses the best resolution, but will possibly load
    a different size image if you mutate the size attribute
    before calling 'load'.

    The info dictionary has a key 'sizes' that is a list
    of sizes that the icns file has.
    """

    format = "ICNS"
    format_description = "Mac OS icns resource"

    def _open(self):
        self.icns = IcnsFile(self.fp)
        self.mode = 'RGBA'
        self.best_size = self.icns.bestsize()
        self.size = (self.best_size[0] * self.best_size[2],
                     self.best_size[1] * self.best_size[2])
        self.info['sizes'] = self.icns.itersizes()
        # Just use this to see if it's loaded or not yet.
        self.tile = ('',)

    def load(self):
        if len(self.size) == 3:
            self.best_size = self.size
            self.size = (self.best_size[0] * self.best_size[2],
                         self.best_size[1] * self.best_size[2])

        Image.Image.load(self)
        if not self.tile:
            return
        self.load_prepare()
        # This is likely NOT the best way to do it, but whatever.
        im = self.icns.getimage(self.best_size)

        # If this is a PNG or JPEG 2000, it won't be loaded yet
        im.load()

        self.im = im.im
        self.mode = im.mode
        self.size = im.size
        self.fp = None
        self.icns = None
        self.tile = ()
        self.load_end()


def _save(im, fp, filename):
    """
    Saves the image as a series of PNG files,
    that are then converted to a .icns file
    using the OS X command line utility 'iconutil'.

    OS X only.
    """
    if hasattr(fp, "flush"):
        fp.flush()

    # create the temporary set of pngs
    iconset = tempfile.mkdtemp('.iconset')
    last_w = None
    last_im = None
    for w in [16, 32, 128, 256, 512]:
        prefix = 'icon_{}x{}'.format(w, w)

        if last_w == w:
            im_scaled = last_im
        else:
            im_scaled = im.resize((w, w), Image.LANCZOS)
        im_scaled.save(os.path.join(iconset, prefix+'.png'))

        im_scaled = im.resize((w*2, w*2), Image.LANCZOS)
        im_scaled.save(os.path.join(iconset, prefix+'@2x.png'))
        last_im = im_scaled

    # iconutil -c icns -o {} {}
    from subprocess import Popen, PIPE, CalledProcessError

    convert_cmd = ["iconutil", "-c", "icns", "-o", filename, iconset]
    stderr = tempfile.TemporaryFile()
    convert_proc = Popen(convert_cmd, stdout=PIPE, stderr=stderr)

    convert_proc.stdout.close()

    retcode = convert_proc.wait()

    # remove the temporary files
    shutil.rmtree(iconset)

    if retcode:
        raise CalledProcessError(retcode, convert_cmd)

Image.register_open(IcnsImageFile.format, IcnsImageFile,
                    lambda x: x[:4] == b'icns')
Image.register_extension(IcnsImageFile.format, '.icns')

if sys.platform == 'darwin':
    Image.register_save(IcnsImageFile.format, _save)

    Image.register_mime(IcnsImageFile.format, "image/icns")


if __name__ == '__main__':
    imf = IcnsImageFile(open(sys.argv[1], 'rb'))
    for size in imf.info['sizes']:
        imf.size = size
        imf.load()
        im = imf.im
        im.save('out-%s-%s-%s.png' % size)
    im = Image.open(open(sys.argv[1], "rb"))
    im.save("out.png")
    if sys.platform == 'windows':
        os.startfile("out.png")