/usr/lib/python2.7/dist-packages/PIL/PdfImagePlugin.py is in python-pil 2.3.0-1ubuntu3.
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 | #
# 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).
##
__version__ = "0.4"
from PIL import Image, ImageFile
from PIL._binary import i8
import io
#
# --------------------------------------------------------------------
# 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")
##
# (Internal) Image save plugin for the PDF format.
def _save(im, fp, filename):
resolution = im.encoderinfo.get("resolution", 72.0)
#
# make sure image data is available
im.load()
xref = [0]*(5+1) # placeholders
class TextWriter:
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")
#
# Get image characteristics
width, height = im.size
# 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 = colorspace + "%02x%02x%02x " % (r, g, b)
colorspace = colorspace + b"> ]"
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[1] = fp.tell()
_obj(fp, 1, Type = "/Catalog",
Pages = "2 0 R")
_endobj(fp)
#
# pages
xref[2] = fp.tell()
_obj(fp, 2, Type = "/Pages",
Count = 1,
Kids = "[4 0 R]")
_endobj(fp)
#
# 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.tostring("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)
xref[3] = fp.tell()
_obj(fp, 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[4] = fp.tell()
_obj(fp, 4)
fp.write("<<\n/Type /Page\n/Parent 2 0 R\n"\
"/Resources <<\n/ProcSet [ /PDF %s ]\n"\
"/XObject << /image 3 0 R >>\n>>\n"\
"/MediaBox [ 0 0 %d %d ]\n/Contents 5 0 R\n>>\n" %\
(procset, int(width * 72.0 /resolution) , int(height * 72.0 / resolution)))
_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[5] = fp.tell()
_obj(fp, 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)
fp.flush()
#
# --------------------------------------------------------------------
Image.register_save("PDF", _save)
Image.register_extension("PDF", ".pdf")
Image.register_mime("PDF", "application/pdf")
|