forked from josch/img2pdf
src/tests/__init__.py: add support for multiframe gif tests
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commit
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1 changed files with 112 additions and 86 deletions
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@ -476,101 +476,127 @@ def test_suite():
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x = PdfReader(StringIO(convert_load(output)))
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self.assertEqual(sorted(x.keys()), [PdfName.Info, PdfName.Root,
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PdfName.Size])
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self.assertEqual(x.Size, '7')
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self.assertIn(x.Root.Pages.Count, ('1', '2'))
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if len(x.Root.Pages.Kids) == '1':
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self.assertEqual(x.Size, '7')
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self.assertEqual(len(x.Root.Pages.Kids), 1)
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elif len(x.Root.Pages.Kids) == '2':
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self.assertEqual(x.Size, '10')
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self.assertEqual(len(x.Root.Pages.Kids), 2)
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self.assertEqual(x.Info, {})
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self.assertEqual(sorted(x.Root.keys()), [PdfName.Pages,
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PdfName.Type])
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self.assertEqual(x.Root.Type, PdfName.Catalog)
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self.assertEqual(sorted(x.Root.Pages.keys()),
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[PdfName.Count, PdfName.Kids, PdfName.Type])
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self.assertEqual(x.Root.Pages.Count, '1')
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self.assertEqual(x.Root.Pages.Type, PdfName.Pages)
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self.assertEqual(len(x.Root.Pages.Kids), 1)
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self.assertEqual(sorted(x.Root.Pages.Kids[0].keys()),
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[PdfName.Contents, PdfName.MediaBox,
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PdfName.Parent, PdfName.Resources, PdfName.Type])
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self.assertEqual(x.Root.Pages.Kids[0].MediaBox,
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['0', '0', '115', '48'])
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self.assertEqual(x.Root.Pages.Kids[0].Parent, x.Root.Pages)
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self.assertEqual(x.Root.Pages.Kids[0].Type, PdfName.Page)
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self.assertEqual(x.Root.Pages.Kids[0].Resources.keys(),
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[PdfName.XObject])
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self.assertEqual(x.Root.Pages.Kids[0].Resources.XObject.keys(),
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[PdfName.Im0])
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self.assertEqual(x.Root.Pages.Kids[0].Contents.keys(),
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[PdfName.Length])
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self.assertEqual(x.Root.Pages.Kids[0].Contents.Length,
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str(len(x.Root.Pages.Kids[0].Contents.stream)))
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self.assertEqual(x.Root.Pages.Kids[0].Contents.stream,
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"q\n115.0000 0 0 48.0000 0.0000 0.0000 cm\n/Im0 "
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"Do\nQ")
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imgprops = x.Root.Pages.Kids[0].Resources.XObject.Im0
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# test if the filter is valid:
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self.assertIn(
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imgprops.Filter, [[PdfName.DCTDecode], [PdfName.JPXDecode],
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[PdfName.FlateDecode],
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[PdfName.CCITTFaxDecode]])
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# test if the colorspace is valid
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self.assertIn(
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imgprops.ColorSpace, [PdfName.DeviceGray, PdfName.DeviceRGB,
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PdfName.DeviceCMYK])
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# test if the image has correct size
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orig_img = Image.open(f)
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self.assertEqual(imgprops.Width, str(orig_img.size[0]))
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self.assertEqual(imgprops.Height, str(orig_img.size[1]))
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# if the input file is a jpeg then it should've been copied
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# verbatim into the PDF
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if imgprops.Filter in [[PdfName.DCTDecode], [PdfName.JPXDecode]]:
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self.assertEqual(
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x.Root.Pages.Kids[0].Resources.XObject.Im0.stream,
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convert_load(orig_imgdata))
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elif imgprops.Filter == [PdfName.CCITTFaxDecode]:
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tiff_header = tiff_header_for_ccitt(
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int(imgprops.Width), int(imgprops.Height),
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int(imgprops.Length), 4)
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imgio = BytesIO()
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imgio.write(tiff_header)
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imgio.write(convert_store(
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x.Root.Pages.Kids[0].Resources.XObject.Im0.stream))
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imgio.seek(0)
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im = Image.open(imgio)
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self.assertEqual(im.tobytes(), orig_img.tobytes())
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try:
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im.close()
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except AttributeError:
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pass
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for pagenum in range(len(x.Root.Pages.Kids)):
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# retrieve the original image frame that this page was
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# generated from
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orig_img.seek(pagenum)
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elif imgprops.Filter == [PdfName.FlateDecode]:
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# otherwise, the data is flate encoded and has to be equal to
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# the pixel data of the input image
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imgdata = zlib.decompress(
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convert_store(
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x.Root.Pages.Kids[0].Resources.XObject.Im0.stream))
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colorspace = imgprops.ColorSpace
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if colorspace == PdfName.DeviceGray:
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colorspace = 'L'
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elif colorspace == PdfName.DeviceRGB:
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colorspace = 'RGB'
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elif colorspace == PdfName.DeviceCMYK:
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colorspace = 'CMYK'
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else:
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raise Exception("invalid colorspace")
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im = Image.frombytes(colorspace, (int(imgprops.Width),
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int(imgprops.Height)),
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imgdata)
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if orig_img.mode == '1':
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orig_img = orig_img.convert("L")
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elif orig_img.mode not in ("RGB", "L", "CMYK", "CMYK;I"):
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orig_img = orig_img.convert("RGB")
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self.assertEqual(im.tobytes(), orig_img.tobytes())
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# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have
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# the close() method
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try:
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im.close()
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except AttributeError:
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pass
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ndpi = orig_img.info.get("dpi", (96.0, 96.0))
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# In python3, the returned dpi value for some tiff images will
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# not be an integer but a float. To make the behaviour of
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# img2pdf the same between python2 and python3, we convert that
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# float into an integer by rounding.
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# Search online for the 72.009 dpi problem for more info.
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ndpi = (int(round(ndpi[0])), int(round(ndpi[1])))
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imgwidthpx, imgheightpx = orig_img.size
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pagewidth = 72*imgwidthpx/ndpi[0]
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pageheight = 72*imgheightpx/ndpi[1]
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def format_float(f):
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if int(f) == f:
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return str(int(f))
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else:
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return ("%.4f" % f).rstrip("0")
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self.assertEqual(sorted(x.Root.Pages.Kids[pagenum].keys()),
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[PdfName.Contents, PdfName.MediaBox,
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PdfName.Parent, PdfName.Resources, PdfName.Type])
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self.assertEqual(x.Root.Pages.Kids[pagenum].MediaBox,
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['0', '0', format_float(pagewidth), format_float(pageheight)])
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self.assertEqual(x.Root.Pages.Kids[pagenum].Parent, x.Root.Pages)
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self.assertEqual(x.Root.Pages.Kids[pagenum].Type, PdfName.Page)
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self.assertEqual(x.Root.Pages.Kids[pagenum].Resources.keys(),
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[PdfName.XObject])
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self.assertEqual(x.Root.Pages.Kids[pagenum].Resources.XObject.keys(),
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[PdfName.Im0])
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self.assertEqual(x.Root.Pages.Kids[pagenum].Contents.keys(),
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[PdfName.Length])
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self.assertEqual(x.Root.Pages.Kids[pagenum].Contents.Length,
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str(len(x.Root.Pages.Kids[pagenum].Contents.stream)))
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self.assertEqual(x.Root.Pages.Kids[pagenum].Contents.stream,
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"q\n%.4f 0 0 %.4f 0.0000 0.0000 cm\n"
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"/Im0 Do\nQ" % (pagewidth, pageheight))
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imgprops = x.Root.Pages.Kids[pagenum].Resources.XObject.Im0
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# test if the filter is valid:
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self.assertIn(
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imgprops.Filter, [[PdfName.DCTDecode], [PdfName.JPXDecode],
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[PdfName.FlateDecode],
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[PdfName.CCITTFaxDecode]])
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# test if the colorspace is valid
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self.assertIn(
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imgprops.ColorSpace, [PdfName.DeviceGray, PdfName.DeviceRGB,
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PdfName.DeviceCMYK])
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# test if the image has correct size
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self.assertEqual(imgprops.Width, str(orig_img.size[0]))
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self.assertEqual(imgprops.Height, str(orig_img.size[1]))
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# if the input file is a jpeg then it should've been copied
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# verbatim into the PDF
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if imgprops.Filter in [[PdfName.DCTDecode], [PdfName.JPXDecode]]:
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self.assertEqual(
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x.Root.Pages.Kids[pagenum].Resources.XObject.Im0.stream,
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convert_load(orig_imgdata))
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elif imgprops.Filter == [PdfName.CCITTFaxDecode]:
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tiff_header = tiff_header_for_ccitt(
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int(imgprops.Width), int(imgprops.Height),
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int(imgprops.Length), 4)
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imgio = BytesIO()
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imgio.write(tiff_header)
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imgio.write(convert_store(
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x.Root.Pages.Kids[pagenum].Resources.XObject.Im0.stream))
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imgio.seek(0)
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im = Image.open(imgio)
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self.assertEqual(im.tobytes(), orig_img.tobytes())
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try:
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im.close()
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except AttributeError:
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pass
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elif imgprops.Filter == [PdfName.FlateDecode]:
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# otherwise, the data is flate encoded and has to be equal to
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# the pixel data of the input image
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imgdata = zlib.decompress(
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convert_store(
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x.Root.Pages.Kids[pagenum].Resources.XObject.Im0.stream))
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colorspace = imgprops.ColorSpace
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if colorspace == PdfName.DeviceGray:
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colorspace = 'L'
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elif colorspace == PdfName.DeviceRGB:
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colorspace = 'RGB'
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elif colorspace == PdfName.DeviceCMYK:
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colorspace = 'CMYK'
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else:
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raise Exception("invalid colorspace")
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im = Image.frombytes(colorspace, (int(imgprops.Width),
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int(imgprops.Height)),
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imgdata)
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if orig_img.mode == '1':
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self.assertEqual(im.tobytes(), orig_img.convert("L").tobytes())
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elif orig_img.mode not in ("RGB", "L", "CMYK", "CMYK;I"):
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self.assertEqual(im.tobytes(), orig_img.convert("RGB").tobytes())
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# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not have
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# the close() method
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try:
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im.close()
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except AttributeError:
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pass
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# now use pdfrw to parse and then write out both pdfs and check the
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# result for equality
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y = PdfReader(out)
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