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src/tests/__init__.py: handle PNG input images properly

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This commit is contained in:
Johannes 'josch' Schauer 2018-07-18 00:05:15 +02:00
parent b99fae1380
commit d931f02709
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 32 additions and 23 deletions
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55
src/tests/__init__.py
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@ -589,30 +589,39 @@ def test_suite():
# 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'
if imgprops.DecodeParms:
if orig_img.format == 'PNG':
pngidat, palette = img2pdf.parse_png(orig_imgdata)
else:
pngbuffer = BytesIO()
orig_img.save(pngbuffer, format="png")
pngidat, palette = img2pdf.parse_png(pngbuffer.getvalue())
self.assertEqual(zlib.decompress(pngidat), imgdata)
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
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)