python3-pil 3.1.2-0ubuntu1 / usr / lib / python3 / dist-packages / PIL / PdfImagePlugin.py

This file is indexed.

/usr/lib/python3/dist-packages/PIL/PdfImagePlugin.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
#
# The Python Imaging Library.
# $Id$
#
# PDF (Acrobat) file handling
#
# History:
# 1996-07-16 fl   Created
# 1997-01-18 fl   Fixed header
# 2004-02-21 fl   Fixes for 1/L/CMYK images, etc.
# 2004-02-24 fl   Fixes for 1 and P images.
#
# Copyright (c) 1997-2004 by Secret Labs AB.  All rights reserved.
# Copyright (c) 1996-1997 by Fredrik Lundh.
#
# See the README file for information on usage and redistribution.
#

##
# Image plugin for PDF images (output only).
##

from PIL import Image, ImageFile
from PIL._binary import i8
import io

__version__ = "0.4"


#
# --------------------------------------------------------------------

# object ids:
#  1. catalogue
#  2. pages
#  3. image
#  4. page
#  5. page contents

def _obj(fp, obj, **dict):
    fp.write("%d 0 obj\n" % obj)
    if dict:
        fp.write("<<\n")
        for k, v in dict.items():
            if v is not None:
                fp.write("/%s %s\n" % (k, v))
        fp.write(">>\n")


def _endobj(fp):
    fp.write("endobj\n")


def _save_all(im, fp, filename):
    _save(im, fp, filename, save_all=True)


##
# (Internal) Image save plugin for the PDF format.

def _save(im, fp, filename, save_all=False):
    resolution = im.encoderinfo.get("resolution", 72.0)

    #
    # make sure image data is available
    im.load()

    xref = [0]

    class TextWriter(object):
        def __init__(self, fp):
            self.fp = fp

        def __getattr__(self, name):
            return getattr(self.fp, name)

        def write(self, value):
            self.fp.write(value.encode('latin-1'))

    fp = TextWriter(fp)

    fp.write("%PDF-1.2\n")
    fp.write("% created by PIL PDF driver " + __version__ + "\n")

    # FIXME: Should replace ASCIIHexDecode with RunLengthDecode (packbits)
    # or LZWDecode (tiff/lzw compression).  Note that PDF 1.2 also supports
    # Flatedecode (zip compression).

    bits = 8
    params = None

    if im.mode == "1":
        filter = "/ASCIIHexDecode"
        colorspace = "/DeviceGray"
        procset = "/ImageB"  # grayscale
        bits = 1
    elif im.mode == "L":
        filter = "/DCTDecode"
        # params = "<< /Predictor 15 /Columns %d >>" % (width-2)
        colorspace = "/DeviceGray"
        procset = "/ImageB"  # grayscale
    elif im.mode == "P":
        filter = "/ASCIIHexDecode"
        colorspace = "[ /Indexed /DeviceRGB 255 <"
        palette = im.im.getpalette("RGB")
        for i in range(256):
            r = i8(palette[i*3])
            g = i8(palette[i*3+1])
            b = i8(palette[i*3+2])
            colorspace += "%02x%02x%02x " % (r, g, b)
        colorspace += "> ]"
        procset = "/ImageI"  # indexed color
    elif im.mode == "RGB":
        filter = "/DCTDecode"
        colorspace = "/DeviceRGB"
        procset = "/ImageC"  # color images
    elif im.mode == "CMYK":
        filter = "/DCTDecode"
        colorspace = "/DeviceCMYK"
        procset = "/ImageC"  # color images
    else:
        raise ValueError("cannot save mode %s" % im.mode)

    #
    # catalogue

    xref.append(fp.tell())
    _obj(
        fp, 1,
        Type="/Catalog",
        Pages="2 0 R")
    _endobj(fp)

    #
    # pages
    numberOfPages = 1
    if save_all:
        try:
            numberOfPages = im.n_frames
        except AttributeError:
            # Image format does not have n_frames. It is a single frame image
            pass
    pages = [str(pageNumber*3+4)+" 0 R"
             for pageNumber in range(0, numberOfPages)]

    xref.append(fp.tell())
    _obj(
        fp, 2,
        Type="/Pages",
        Count=len(pages),
        Kids="["+"\n".join(pages)+"]")
    _endobj(fp)

    for pageNumber in range(0, numberOfPages):
        im.seek(pageNumber)

        #
        # image

        op = io.BytesIO()

        if filter == "/ASCIIHexDecode":
            if bits == 1:
                # FIXME: the hex encoder doesn't support packed 1-bit
                # images; do things the hard way...
                data = im.tobytes("raw", "1")
                im = Image.new("L", (len(data), 1), None)
                im.putdata(data)
            ImageFile._save(im, op, [("hex", (0, 0)+im.size, 0, im.mode)])
        elif filter == "/DCTDecode":
            Image.SAVE["JPEG"](im, op, filename)
        elif filter == "/FlateDecode":
            ImageFile._save(im, op, [("zip", (0, 0)+im.size, 0, im.mode)])
        elif filter == "/RunLengthDecode":
            ImageFile._save(im, op, [("packbits", (0, 0)+im.size, 0, im.mode)])
        else:
            raise ValueError("unsupported PDF filter (%s)" % filter)

        #
        # Get image characteristics

        width, height = im.size

        xref.append(fp.tell())
        _obj(
            fp, pageNumber*3+3,
            Type="/XObject",
            Subtype="/Image",
            Width=width,  # * 72.0 / resolution,
            Height=height,  # * 72.0 / resolution,
            Length=len(op.getvalue()),
            Filter=filter,
            BitsPerComponent=bits,
            DecodeParams=params,
            ColorSpace=colorspace)

        fp.write("stream\n")
        fp.fp.write(op.getvalue())
        fp.write("\nendstream\n")

        _endobj(fp)

        #
        # page

        xref.append(fp.tell())
        _obj(fp, pageNumber*3+4)
        fp.write(
            "<<\n/Type /Page\n/Parent 2 0 R\n"
            "/Resources <<\n/ProcSet [ /PDF %s ]\n"
            "/XObject << /image %d 0 R >>\n>>\n"
            "/MediaBox [ 0 0 %d %d ]\n/Contents %d 0 R\n>>\n" % (
                procset,
                pageNumber*3+3,
                int(width * 72.0 / resolution),
                int(height * 72.0 / resolution),
                pageNumber*3+5))
        _endobj(fp)

        #
        # page contents

        op = TextWriter(io.BytesIO())

        op.write(
            "q %d 0 0 %d 0 0 cm /image Do Q\n" % (
                int(width * 72.0 / resolution),
                int(height * 72.0 / resolution)))

        xref.append(fp.tell())
        _obj(fp, pageNumber*3+5, Length=len(op.fp.getvalue()))

        fp.write("stream\n")
        fp.fp.write(op.fp.getvalue())
        fp.write("\nendstream\n")

        _endobj(fp)

    #
    # trailer
    startxref = fp.tell()
    fp.write("xref\n0 %d\n0000000000 65535 f \n" % len(xref))
    for x in xref[1:]:
        fp.write("%010d 00000 n \n" % x)
    fp.write("trailer\n<<\n/Size %d\n/Root 1 0 R\n>>\n" % len(xref))
    fp.write("startxref\n%d\n%%%%EOF\n" % startxref)
    if hasattr(fp, "flush"):
        fp.flush()

#
# --------------------------------------------------------------------

Image.register_save("PDF", _save)
Image.register_save_all("PDF", _save_all)

Image.register_extension("PDF", ".pdf")

Image.register_mime("PDF", "application/pdf")

APT Browse - Built by Thomas Orozco.