def roundtrip(self, testname, basename, srcf, decompress=False,
compress=False, repaginate=False):
dstd = os.path.join(expected.result_dir, testname)
if not os.path.exists(dstd):
os.makedirs(dstd)
dstf = os.path.join(dstd, basename)
hashfile = os.path.join(expected.result_dir, 'hashes.txt')
hashkey = '%s/%s' % (testname, basename)
hash = '------no-file-generated---------'
expects = expected.results[hashkey]
# If the test has been deliberately skipped,
# we are done. Otherwise, execute it even
# if we don't know about it yet, so we have
# results to compare.
result = 'fail'
size = 0
try:
if 'skip' in expects:
result = 'skip requested'
return self.skipTest(result)
elif 'xfail' in expects:
result = 'xfail requested'
return self.fail(result)
exists = os.path.exists(dstf)
if expects or not exists:
if exists:
os.remove(dstf)
trailer = pdfrw.PdfReader(srcf, decompress=decompress,
verbose=False)
writer = pdfrw.PdfWriter(dstf, compress=compress)
if repaginate:
writer.addpages(trailer.pages)
else:
writer.trailer = trailer
writer.write()
with open(dstf, 'rb') as f:
data = f.read()
size = len(data)
if data:
hash = hashlib.md5(data).hexdigest()
else:
os.remove(dstf)
if expects:
if len(expects) == 1:
expects, = expects
self.assertEqual(hash, expects)
else:
self.assertIn(hash, expects)
result = 'pass'
else:
result = 'skip'
self.skipTest('No hash available')
finally:
result = '%8d %-20s %s %s\n' % (size, result, hashkey, hash)
with open(hashfile, 'ab') as f:
f.write(convert_store(result))
def handle(self, f=inputf, out=outputf, with_pdfrw=with_pdfrw):
with open(f, "rb") as inf:
orig_imgdata = inf.read()
output = img2pdf.convert(orig_imgdata, nodate=True,
with_pdfrw=with_pdfrw)
from io import StringIO, BytesIO
from pdfrw import PdfReader, PdfName, PdfWriter
from pdfrw.py23_diffs import convert_load, convert_store
x = PdfReader(StringIO(convert_load(output)))
self.assertEqual(sorted(x.keys()), [PdfName.Info, PdfName.Root,
PdfName.Size])
self.assertEqual(x.Size, '7')
self.assertEqual(x.Info, {})
self.assertEqual(sorted(x.Root.keys()), [PdfName.Pages,
PdfName.Type])
self.assertEqual(x.Root.Type, PdfName.Catalog)
self.assertEqual(sorted(x.Root.Pages.keys()),
[PdfName.Count, PdfName.Kids, PdfName.Type])
self.assertEqual(x.Root.Pages.Count, '1')
self.assertEqual(x.Root.Pages.Type, PdfName.Pages)
self.assertEqual(len(x.Root.Pages.Kids), 1)
self.assertEqual(sorted(x.Root.Pages.Kids[0].keys()),
[PdfName.Contents, PdfName.MediaBox,
PdfName.Parent, PdfName.Resources, PdfName.Type])
self.assertEqual(x.Root.Pages.Kids[0].MediaBox,
['0', '0', '115', '48'])
self.assertEqual(x.Root.Pages.Kids[0].Parent, x.Root.Pages)
self.assertEqual(x.Root.Pages.Kids[0].Type, PdfName.Page)
self.assertEqual(x.Root.Pages.Kids[0].Resources.keys(),
[PdfName.XObject])
self.assertEqual(x.Root.Pages.Kids[0].Resources.XObject.keys(),
[PdfName.Im0])
self.assertEqual(x.Root.Pages.Kids[0].Contents.keys(),
[PdfName.Length])
self.assertEqual(x.Root.Pages.Kids[0].Contents.Length,
str(len(x.Root.Pages.Kids[0].Contents.stream)))
self.assertEqual(x.Root.Pages.Kids[0].Contents.stream,
"q\n115.0000 0 0 48.0000 0.0000 0.0000 cm\n/Im0 "
"Do\nQ")
imgprops = x.Root.Pages.Kids[0].Resources.XObject.Im0
# test if the filter is valid:
self.assertIn(
imgprops.Filter, [[PdfName.DCTDecode], [PdfName.JPXDecode],
[PdfName.FlateDecode]])
# test if the colorspace is valid
self.assertIn(
imgprops.ColorSpace, [PdfName.DeviceGray, PdfName.DeviceRGB,
PdfName.DeviceCMYK])
# test if the image has correct size
orig_img = Image.open(f)
self.assertEqual(imgprops.Width, str(orig_img.size[0]))
self.assertEqual(imgprops.Height, str(orig_img.size[1]))
# if the input file is a jpeg then it should've been copied
# verbatim into the PDF
if imgprops.Filter in [[PdfName.DCTDecode], [PdfName.JPXDecode]]:
self.assertEqual(
x.Root.Pages.Kids[0].Resources.XObject.Im0.stream,
convert_load(orig_imgdata))
elif imgprops.Filter == [PdfName.FlateDecode]:
# otherwise, the data is flate encoded and has to be equal to
# the pixel data of the input image
imgdata = zlib.decompress(
convert_store(
x.Root.Pages.Kids[0].Resources.XObject.Im0.stream))
colorspace = imgprops.ColorSpace
if colorspace == PdfName.DeviceGray:
colorspace = 'L'
elif colorspace == PdfName.DeviceRGB:
colorspace = 'RGB'
elif colorspace == PdfName.DeviceCMYK:
colorspace = 'CMYK'
else:
raise Exception("invalid colorspace")
im = Image.frombytes(colorspace, (int(imgprops.Width),
int(imgprops.Height)),
imgdata)
if orig_img.mode == '1':
orig_img = orig_img.convert("L")
elif orig_img.mode not in ("RGB", "L", "CMYK", "CMYK;I"):
orig_img = orig_img.convert("RGB")
self.assertEqual(im.tobytes(), orig_img.tobytes())
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have
# the close() method
try:
im.close()
except AttributeError:
pass
# now use pdfrw to parse and then write out both pdfs and check the
# result for equality
y = PdfReader(out)
outx = BytesIO()
outy = BytesIO()
xwriter = PdfWriter()
ywriter = PdfWriter()
xwriter.trailer = x
ywriter.trailer = y
xwriter.write(outx)
ywriter.write(outy)
self.assertEqual(outx.getvalue(), outy.getvalue())
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have the
# close() method
try:
orig_img.close()
except AttributeError:
pass
def roundtrip(self, testname, basename, srcf, decompress=False,
compress=False, repaginate=False):
dstd = os.path.join(expected.result_dir, testname)
if not os.path.exists(dstd):
os.makedirs(dstd)
dstf = os.path.join(dstd, basename)
hashfile = os.path.join(expected.result_dir, 'hashes.txt')
hashkey = '%s/%s' % (testname, basename)
hash = '------no-file-generated---------'
expects = expected.results[hashkey]
# If the test has been deliberately skipped,
# we are done. Otherwise, execute it even
# if we don't know about it yet, so we have
# results to compare.
result = 'fail'
size = 0
try:
if 'skip' in expects:
result = 'skip requested'
return self.skipTest(result)
elif 'xfail' in expects:
result = 'xfail requested'
return self.fail(result)
exists = os.path.exists(dstf)
if expects or not exists:
if exists:
os.remove(dstf)
trailer = pdfrw.PdfReader(srcf, decompress=decompress,
verbose=False)
if trailer.Encrypt:
result = 'skip -- encrypt'
hash = '------skip-encrypt-no-file------'
return self.skipTest('File encrypted')
writer = pdfrw.PdfWriter(dstf, compress=compress)
if repaginate:
writer.addpages(trailer.pages)
else:
writer.trailer = trailer
writer.write()
with open(dstf, 'rb') as f:
data = f.read()
size = len(data)
if data:
hash = hashlib.md5(data).hexdigest()
else:
os.remove(dstf)
if expects:
if len(expects) == 1:
expects, = expects
self.assertEqual(hash, expects)
else:
self.assertIn(hash, expects)
result = 'pass'
else:
result = 'skip'
self.skipTest('No hash available')
finally:
result = '%8d %-20s %s %s\n' % (size, result, hashkey, hash)
with open(hashfile, 'ab') as f:
f.write(convert_store(result))
def decode_bytes(self, decode_this, expected):
""" Decode to bytes"""
self.assertEqual(PdfString(decode_this).to_bytes(),
convert_store(expected))
def do_test(self, params, prev_results=[''], scrub=False):
params = params.split()
hashkey = 'examples/%s' % '_'.join(params)
params = [lookup.get(x, x) for x in params]
progname = params[0]
params[0] = prog_dir % progname
srcf = params[1]
params.insert(0, sys.executable)
subdir, progname = os.path.split(progname)
subdir = os.path.join(dstdir, subdir)
if not os.path.exists(subdir):
os.makedirs(subdir)
os.chdir(subdir)
dstf = '%s.%s' % (progname, os.path.basename(srcf))
scrub = scrub and dstf
dstf = dstf if not scrub else 'final.%s' % dstf
hash = '------no-file-generated---------'
expects = expected.results[hashkey]
# If the test has been deliberately skipped,
# we are done. Otherwise, execute it even
# if we don't know about it yet, so we have
# results to compare.
result = 'fail'
size = 0
try:
if 'skip' in expects:
result = 'skip requested'
return self.skipTest(result)
elif 'xfail' in expects:
result = 'xfail requested'
return self.fail(result)
exists = os.path.exists(dstf)
if expects or not exists:
if exists:
os.remove(dstf)
if scrub and os.path.exists(scrub):
os.remove(scrub)
subprocess.call(params)
if scrub:
PdfWriter(dstf).addpages(PdfReader(scrub).pages).write()
with open(dstf, 'rb') as f:
data = f.read()
size = len(data)
if data:
hash = hashlib.md5(data).hexdigest()
lookup[hash] = dstf
prev_results[0] = hash
else:
os.remove(dstf)
if expects:
if len(expects) == 1:
expects, = expects
self.assertEqual(hash, expects)
else:
self.assertIn(hash, expects)
result = 'pass'
else:
result = 'skip'
self.skipTest('No hash available')
finally:
result = '%8d %-20s %s %s\n' % (size, result, hashkey, hash)
with open(hashfile, 'ab') as f:
f.write(convert_store(result))
def handle(self, f=inputf, out=outputf, with_pdfrw=with_pdfrw):
with open(f, "rb") as inf:
orig_imgdata = inf.read()
output = img2pdf.convert(orig_imgdata, nodate=True,
with_pdfrw=with_pdfrw)
from pdfrw import PdfReader, PdfName, PdfWriter
from pdfrw.py23_diffs import convert_load, convert_store
x = PdfReader(PdfReaderIO(convert_load(output)))
self.assertEqual(sorted(x.keys()), [PdfName.Info, PdfName.Root,
PdfName.Size])
self.assertIn(x.Root.Pages.Count, ('1', '2'))
if len(x.Root.Pages.Kids) == '1':
self.assertEqual(x.Size, '7')
self.assertEqual(len(x.Root.Pages.Kids), 1)
elif len(x.Root.Pages.Kids) == '2':
self.assertEqual(x.Size, '10')
self.assertEqual(len(x.Root.Pages.Kids), 2)
self.assertEqual(x.Info, {})
self.assertEqual(sorted(x.Root.keys()), [PdfName.Pages,
PdfName.Type])
self.assertEqual(x.Root.Type, PdfName.Catalog)
self.assertEqual(sorted(x.Root.Pages.keys()),
[PdfName.Count, PdfName.Kids, PdfName.Type])
self.assertEqual(x.Root.Pages.Type, PdfName.Pages)
orig_img = Image.open(f)
for pagenum in range(len(x.Root.Pages.Kids)):
# retrieve the original image frame that this page was
# generated from
orig_img.seek(pagenum)
cur_page = x.Root.Pages.Kids[pagenum]
ndpi = orig_img.info.get("dpi", (96.0, 96.0))
# In python3, the returned dpi value for some tiff images will
# not be an integer but a float. To make the behaviour of
# img2pdf the same between python2 and python3, we convert that
# float into an integer by rounding.
# Search online for the 72.009 dpi problem for more info.
ndpi = (int(round(ndpi[0])), int(round(ndpi[1])))
imgwidthpx, imgheightpx = orig_img.size
pagewidth = 72.0*imgwidthpx/ndpi[0]
pageheight = 72.0*imgheightpx/ndpi[1]
def format_float(f):
if int(f) == f:
return str(int(f))
else:
return ("%.4f" % f).rstrip("0")
self.assertEqual(sorted(cur_page.keys()),
[PdfName.Contents, PdfName.MediaBox,
PdfName.Parent, PdfName.Resources,
PdfName.Type])
self.assertEqual(cur_page.MediaBox,
['0', '0', format_float(pagewidth),
format_float(pageheight)])
self.assertEqual(cur_page.Parent, x.Root.Pages)
self.assertEqual(cur_page.Type, PdfName.Page)
self.assertEqual(cur_page.Resources.keys(),
[PdfName.XObject])
self.assertEqual(cur_page.Resources.XObject.keys(),
[PdfName.Im0])
self.assertEqual(cur_page.Contents.keys(),
[PdfName.Length])
self.assertEqual(cur_page.Contents.Length,
str(len(cur_page.Contents.stream)))
self.assertEqual(cur_page.Contents.stream,
"q\n%.4f 0 0 %.4f 0.0000 0.0000 cm\n"
"/Im0 Do\nQ" % (pagewidth, pageheight))
imgprops = cur_page.Resources.XObject.Im0
# test if the filter is valid:
self.assertIn(
imgprops.Filter, [PdfName.DCTDecode, PdfName.JPXDecode,
PdfName.FlateDecode,
[PdfName.CCITTFaxDecode]])
# test if the image has correct size
self.assertEqual(imgprops.Width, str(orig_img.size[0]))
self.assertEqual(imgprops.Height, str(orig_img.size[1]))
# if the input file is a jpeg then it should've been copied
# verbatim into the PDF
if imgprops.Filter in [PdfName.DCTDecode,
PdfName.JPXDecode]:
self.assertEqual(
cur_page.Resources.XObject.Im0.stream,
convert_load(orig_imgdata))
elif imgprops.Filter == [PdfName.CCITTFaxDecode]:
tiff_header = tiff_header_for_ccitt(
int(imgprops.Width), int(imgprops.Height),
int(imgprops.Length), 4)
imgio = BytesIO()
imgio.write(tiff_header)
imgio.write(convert_store(
cur_page.Resources.XObject.Im0.stream))
imgio.seek(0)
im = Image.open(imgio)
self.assertEqual(im.tobytes(), orig_img.tobytes())
try:
im.close()
except AttributeError:
pass
elif imgprops.Filter == PdfName.FlateDecode:
# otherwise, the data is flate encoded and has to be equal
# to the pixel data of the input image
imgdata = zlib.decompress(
convert_store(cur_page.Resources.XObject.Im0.stream))
if imgprops.DecodeParms:
if orig_img.format == 'PNG':
pngidat, palette = img2pdf.parse_png(orig_imgdata)
elif orig_img.format == 'TIFF' \
and orig_img.info['compression'] == "group4":
offset, length = \
img2pdf.ccitt_payload_location_from_pil(
orig_img)
pngidat = orig_imgdata[offset:offset+length]
else:
pngbuffer = BytesIO()
orig_img.save(pngbuffer, format="png")
pngidat, palette = img2pdf.parse_png(
pngbuffer.getvalue())
self.assertEqual(zlib.decompress(pngidat), imgdata)
else:
colorspace = imgprops.ColorSpace
if colorspace == PdfName.DeviceGray:
colorspace = 'L'
elif colorspace == PdfName.DeviceRGB:
colorspace = 'RGB'
elif colorspace == PdfName.DeviceCMYK:
colorspace = 'CMYK'
else:
raise Exception("invalid colorspace")
im = Image.frombytes(colorspace,
(int(imgprops.Width),
int(imgprops.Height)),
imgdata)
if orig_img.mode == '1':
self.assertEqual(im.tobytes(),
orig_img.convert("L").tobytes())
elif orig_img.mode not in ("RGB", "L", "CMYK",
"CMYK;I"):
self.assertEqual(im.tobytes(),
orig_img.convert("RGB").tobytes())
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does
# not have the close() method
try:
im.close()
except AttributeError:
pass
# now use pdfrw to parse and then write out both pdfs and check the
# result for equality
y = PdfReader(out)
outx = BytesIO()
outy = BytesIO()
xwriter = PdfWriter()
ywriter = PdfWriter()
xwriter.trailer = x
ywriter.trailer = y
xwriter.write(outx)
ywriter.write(outy)
self.assertEqual(compare_pdf(outx.getvalue(), outy.getvalue()), True)
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have the
# close() method
try:
orig_img.close()
except AttributeError:
pass
def handle(self, f=inputf, out=outputf, with_pdfrw=with_pdfrw):
with open(f, "rb") as inf:
orig_imgdata = inf.read()
output = img2pdf.convert(orig_imgdata, nodate=True,
with_pdfrw=with_pdfrw)
from pdfrw import PdfReader, PdfName, PdfWriter
from pdfrw.py23_diffs import convert_load, convert_store
x = PdfReader(PdfReaderIO(convert_load(output)))
self.assertEqual(sorted(x.keys()), [PdfName.Info, PdfName.Root,
PdfName.Size])
self.assertIn(x.Root.Pages.Count, ('1', '2'))
if len(x.Root.Pages.Kids) == '1':
self.assertEqual(x.Size, '7')
self.assertEqual(len(x.Root.Pages.Kids), 1)
elif len(x.Root.Pages.Kids) == '2':
self.assertEqual(x.Size, '10')
self.assertEqual(len(x.Root.Pages.Kids), 2)
self.assertEqual(x.Info, {})
self.assertEqual(sorted(x.Root.keys()), [PdfName.Pages,
PdfName.Type])
self.assertEqual(x.Root.Type, PdfName.Catalog)
self.assertEqual(sorted(x.Root.Pages.keys()),
[PdfName.Count, PdfName.Kids, PdfName.Type])
self.assertEqual(x.Root.Pages.Type, PdfName.Pages)
orig_img = Image.open(f)
for pagenum in range(len(x.Root.Pages.Kids)):
# retrieve the original image frame that this page was
# generated from
orig_img.seek(pagenum)
cur_page = x.Root.Pages.Kids[pagenum]
ndpi = orig_img.info.get("dpi", (96.0, 96.0))
# In python3, the returned dpi value for some tiff images will
# not be an integer but a float. To make the behaviour of
# img2pdf the same between python2 and python3, we convert that
# float into an integer by rounding.
# Search online for the 72.009 dpi problem for more info.
ndpi = (int(round(ndpi[0])), int(round(ndpi[1])))
imgwidthpx, imgheightpx = orig_img.size
pagewidth = 72.0*imgwidthpx/ndpi[0]
pageheight = 72.0*imgheightpx/ndpi[1]
def format_float(f):
if int(f) == f:
return str(int(f))
else:
return ("%.4f" % f).rstrip("0")
self.assertEqual(sorted(cur_page.keys()),
[PdfName.Contents, PdfName.MediaBox,
PdfName.Parent, PdfName.Resources,
PdfName.Type])
self.assertEqual(cur_page.MediaBox,
['0', '0', format_float(pagewidth),
format_float(pageheight)])
self.assertEqual(cur_page.Parent, x.Root.Pages)
self.assertEqual(cur_page.Type, PdfName.Page)
self.assertEqual(cur_page.Resources.keys(),
[PdfName.XObject])
self.assertEqual(cur_page.Resources.XObject.keys(),
[PdfName.Im0])
self.assertEqual(cur_page.Contents.keys(),
[PdfName.Length])
self.assertEqual(cur_page.Contents.Length,
str(len(cur_page.Contents.stream)))
self.assertEqual(cur_page.Contents.stream,
"q\n%.4f 0 0 %.4f 0.0000 0.0000 cm\n"
"/Im0 Do\nQ" % (pagewidth, pageheight))
imgprops = cur_page.Resources.XObject.Im0
# test if the filter is valid:
self.assertIn(
imgprops.Filter, [[PdfName.DCTDecode], [PdfName.JPXDecode],
[PdfName.FlateDecode],
[PdfName.CCITTFaxDecode]])
# test if the colorspace is valid
self.assertIn(
imgprops.ColorSpace, [PdfName.DeviceGray,
PdfName.DeviceRGB,
PdfName.DeviceCMYK])
# test if the image has correct size
self.assertEqual(imgprops.Width, str(orig_img.size[0]))
self.assertEqual(imgprops.Height, str(orig_img.size[1]))
# if the input file is a jpeg then it should've been copied
# verbatim into the PDF
if imgprops.Filter in [[PdfName.DCTDecode],
[PdfName.JPXDecode]]:
self.assertEqual(
cur_page.Resources.XObject.Im0.stream,
convert_load(orig_imgdata))
elif imgprops.Filter == [PdfName.CCITTFaxDecode]:
tiff_header = tiff_header_for_ccitt(
int(imgprops.Width), int(imgprops.Height),
int(imgprops.Length), 4)
imgio = BytesIO()
imgio.write(tiff_header)
imgio.write(convert_store(
cur_page.Resources.XObject.Im0.stream))
imgio.seek(0)
im = Image.open(imgio)
self.assertEqual(im.tobytes(), orig_img.tobytes())
try:
im.close()
except AttributeError:
pass
elif imgprops.Filter == [PdfName.FlateDecode]:
# otherwise, the data is flate encoded and has to be equal
# to the pixel data of the input image
imgdata = zlib.decompress(
convert_store(cur_page.Resources.XObject.Im0.stream))
colorspace = imgprops.ColorSpace
if colorspace == PdfName.DeviceGray:
colorspace = 'L'
elif colorspace == PdfName.DeviceRGB:
colorspace = 'RGB'
elif colorspace == PdfName.DeviceCMYK:
colorspace = 'CMYK'
else:
raise Exception("invalid colorspace")
im = Image.frombytes(colorspace, (int(imgprops.Width),
int(imgprops.Height)),
imgdata)
if orig_img.mode == '1':
self.assertEqual(im.tobytes(),
orig_img.convert("L").tobytes())
elif orig_img.mode not in ("RGB", "L", "CMYK", "CMYK;I"):
self.assertEqual(im.tobytes(),
orig_img.convert("RGB").tobytes())
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not
# have the close() method
try:
im.close()
except AttributeError:
pass
# now use pdfrw to parse and then write out both pdfs and check the
# result for equality
y = PdfReader(out)
outx = BytesIO()
outy = BytesIO()
xwriter = PdfWriter()
ywriter = PdfWriter()
xwriter.trailer = x
ywriter.trailer = y
xwriter.write(outx)
ywriter.write(outy)
self.assertEqual(outx.getvalue(), outy.getvalue())
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have the
# close() method
try:
orig_img.close()
except AttributeError:
pass
def handle(self, f=inputf, out=outputf, with_pdfrw=with_pdfrw):
with open(f, "rb") as inf:
orig_imgdata = inf.read()
output = img2pdf.convert(orig_imgdata, nodate=True,
with_pdfrw=with_pdfrw)
from io import StringIO, BytesIO
from pdfrw import PdfReader, PdfName, PdfWriter
from pdfrw.py23_diffs import convert_load, convert_store
x = PdfReader(StringIO(convert_load(output)))
self.assertEqual(sorted(x.keys()), [PdfName.Info, PdfName.Root,
PdfName.Size])
self.assertEqual(x.Size, '7')
self.assertEqual(x.Info, {})
self.assertEqual(sorted(x.Root.keys()), [PdfName.Pages,
PdfName.Type])
self.assertEqual(x.Root.Type, PdfName.Catalog)
self.assertEqual(sorted(x.Root.Pages.keys()),
[PdfName.Count, PdfName.Kids, PdfName.Type])
self.assertEqual(x.Root.Pages.Count, '1')
self.assertEqual(x.Root.Pages.Type, PdfName.Pages)
self.assertEqual(len(x.Root.Pages.Kids), 1)
self.assertEqual(sorted(x.Root.Pages.Kids[0].keys()),
[PdfName.Contents, PdfName.MediaBox,
PdfName.Parent, PdfName.Resources, PdfName.Type])
self.assertEqual(x.Root.Pages.Kids[0].MediaBox,
['0', '0', '115', '48'])
self.assertEqual(x.Root.Pages.Kids[0].Parent, x.Root.Pages)
self.assertEqual(x.Root.Pages.Kids[0].Type, PdfName.Page)
self.assertEqual(x.Root.Pages.Kids[0].Resources.keys(),
[PdfName.XObject])
self.assertEqual(x.Root.Pages.Kids[0].Resources.XObject.keys(),
[PdfName.Im0])
self.assertEqual(x.Root.Pages.Kids[0].Contents.keys(),
[PdfName.Length])
self.assertEqual(x.Root.Pages.Kids[0].Contents.Length,
str(len(x.Root.Pages.Kids[0].Contents.stream)))
self.assertEqual(x.Root.Pages.Kids[0].Contents.stream,
"q\n115.0000 0 0 48.0000 0.0000 0.0000 cm\n/Im0 "
"Do\nQ")
imgprops = x.Root.Pages.Kids[0].Resources.XObject.Im0
# test if the filter is valid:
self.assertIn(
imgprops.Filter, [[PdfName.DCTDecode], [PdfName.JPXDecode],
[PdfName.FlateDecode],
[PdfName.CCITTFaxDecode]])
# test if the colorspace is valid
self.assertIn(
imgprops.ColorSpace, [PdfName.DeviceGray, PdfName.DeviceRGB,
PdfName.DeviceCMYK])
# test if the image has correct size
orig_img = Image.open(f)
self.assertEqual(imgprops.Width, str(orig_img.size[0]))
self.assertEqual(imgprops.Height, str(orig_img.size[1]))
# if the input file is a jpeg then it should've been copied
# verbatim into the PDF
if imgprops.Filter in [[PdfName.DCTDecode], [PdfName.JPXDecode]]:
self.assertEqual(
x.Root.Pages.Kids[0].Resources.XObject.Im0.stream,
convert_load(orig_imgdata))
elif imgprops.Filter == [PdfName.CCITTFaxDecode]:
tiff_header = tiff_header_for_ccitt(
int(imgprops.Width), int(imgprops.Height),
int(imgprops.Length), 4)
imgio = BytesIO()
imgio.write(tiff_header)
imgio.write(convert_store(
x.Root.Pages.Kids[0].Resources.XObject.Im0.stream))
imgio.seek(0)
im = Image.open(imgio)
self.assertEqual(im.tobytes(), orig_img.tobytes())
try:
im.close()
except AttributeError:
pass
elif imgprops.Filter == [PdfName.FlateDecode]:
# otherwise, the data is flate encoded and has to be equal to
# the pixel data of the input image
imgdata = zlib.decompress(
convert_store(
x.Root.Pages.Kids[0].Resources.XObject.Im0.stream))
colorspace = imgprops.ColorSpace
if colorspace == PdfName.DeviceGray:
colorspace = 'L'
elif colorspace == PdfName.DeviceRGB:
colorspace = 'RGB'
elif colorspace == PdfName.DeviceCMYK:
colorspace = 'CMYK'
else:
raise Exception("invalid colorspace")
im = Image.frombytes(colorspace, (int(imgprops.Width),
int(imgprops.Height)),
imgdata)
if orig_img.mode == '1':
orig_img = orig_img.convert("L")
elif orig_img.mode not in ("RGB", "L", "CMYK", "CMYK;I"):
orig_img = orig_img.convert("RGB")
self.assertEqual(im.tobytes(), orig_img.tobytes())
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have
# the close() method
try:
im.close()
except AttributeError:
pass
# now use pdfrw to parse and then write out both pdfs and check the
# result for equality
y = PdfReader(out)
outx = BytesIO()
outy = BytesIO()
xwriter = PdfWriter()
ywriter = PdfWriter()
xwriter.trailer = x
ywriter.trailer = y
xwriter.write(outx)
ywriter.write(outy)
self.assertEqual(outx.getvalue(), outy.getvalue())
# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have the
# close() method
try:
orig_img.close()
except AttributeError:
pass
