forked from josch/img2pdf
make pep8 compliant
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parent
9395b6fbbe
commit
198c98a5f9
GPG key ID:
F2CBA5C78FBD83E1
2 changed files with 48 additions and 28 deletions
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@ -277,7 +277,8 @@ if PY3:
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@classmethod
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def encode(cls, string, hextype=False):
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if hextype:
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return b'< ' + b' '.join(("%06x"%c).encode('ascii') for c in string) + b' >'
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return b'< ' + b' '.join(
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("%06x" % c).encode('ascii') for c in string) + b' >'
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else:
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try:
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string = string.encode('ascii')
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@ -292,7 +293,8 @@ else:
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@classmethod
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def encode(cls, string, hextype=False):
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if hextype:
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return b'< ' + b' '.join(("%06x"%c).encode('ascii') for c in string) + b' >'
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return b'< ' + b' '.join(
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("%06x" % c).encode('ascii') for c in string) + b' >'
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else:
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# This mimics exactely to what pdfrw does.
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string = string.replace(b'\\', b'\\\\')
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@ -393,8 +395,11 @@ class pdfdoc(object):
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colorspace = PdfName.DeviceCMYK
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elif color == Colorspace.P:
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if self.with_pdfrw:
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raise Exception("pdfrw does not support hex strings for palette image input, re-run with --without-pdfrw")
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colorspace = [ PdfName.Indexed, PdfName.DeviceRGB, len(palette)-1, PdfString.encode(palette, hextype=True)]
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raise Exception("pdfrw does not support hex strings for "
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"palette image input, re-run with "
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"--without-pdfrw")
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colorspace = [PdfName.Indexed, PdfName.DeviceRGB, len(palette)-1,
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PdfString.encode(palette, hextype=True)]
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else:
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raise UnsupportedColorspaceError("unsupported color space: %s"
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% color.name)
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@ -453,7 +458,7 @@ class pdfdoc(object):
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elif imgformat is ImageFormat.PNG:
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decodeparms = PdfDict()
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decodeparms[PdfName.Predictor] = 15
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if color in [ Colorspace.P, Colorspace['1'], Colorspace.L ]:
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if color in [Colorspace.P, Colorspace['1'], Colorspace.L]:
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decodeparms[PdfName.Colors] = 1
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else:
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decodeparms[PdfName.Colors] = 3
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@ -647,13 +652,14 @@ def get_imgmetadata(imgdata, imgformat, default_dpi, colorspace, rawdata=None):
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ics = imgdata.mode
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if ics in ["LA", "PA", "RGBA"]:
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logging.warning("Image contains transparency which cannot be retained in PDF.")
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logging.warning("Image contains transparency which cannot be retained "
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"in PDF.")
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logging.warning("img2pdf will not perform a lossy operation.")
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logging.warning("You can remove the alpha channel using imagemagick:")
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logging.warning(" $ convert input.png -background white -alpha remove -alpha off output.png")
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logging.warning(" $ convert input.png -background white -alpha "
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"remove -alpha off output.png")
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raise Exception("Refusing to work on images with alpha channel")
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# Since commit 07a96209597c5e8dfe785c757d7051ce67a980fb or release 4.1.0
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# Pillow retrieves the DPI from EXIF if it cannot find the DPI in the JPEG
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# header. In that case it can happen that the horizontal and vertical DPI
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@ -694,7 +700,8 @@ def ccitt_payload_location_from_pil(img):
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# If Pillow is passed an invalid compression argument it will ignore it;
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# make sure the image actually got compressed.
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if img.info['compression'] != 'group4':
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raise ValueError("Image not compressed with CCITT Group 4 but with: %s" % img.info['compression'])
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raise ValueError("Image not compressed with CCITT Group 4 but with: %s"
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% img.info['compression'])
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# Read the TIFF tags to find the offset(s) of the compressed data strips.
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strip_offsets = img.tag_v2[TiffImagePlugin.STRIPOFFSETS]
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@ -747,18 +754,20 @@ def parse_png(rawdata):
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# once we can require Python >= 3.2 we can use int.from_bytes() instead
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n, = struct.unpack('>I', rawdata[i-8:i-4])
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if i + n > len(rawdata):
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raise Exception("invalid png: %d %d %d"%(i, n, len(rawdata)))
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raise Exception("invalid png: %d %d %d" % (i, n, len(rawdata)))
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if rawdata[i-4:i] == b"IDAT":
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pngidat += rawdata[i:i+n]
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elif rawdata[i-4:i] == b"PLTE":
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for j in range(i, i+n, 3):
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# with int.from_bytes() we would not have to prepend extra zeroes
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# with int.from_bytes() we would not have to prepend extra
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# zeroes
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color, = struct.unpack('>I', b'\x00'+rawdata[j:j+3])
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palette.append(color)
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i += n
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i += 12
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return pngidat, palette
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def read_images(rawdata, colorspace, first_frame_only=False):
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im = BytesIO(rawdata)
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im.seek(0)
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@ -796,7 +805,8 @@ def read_images(rawdata, colorspace, first_frame_only=False):
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if color == Colorspace['RGBA']:
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raise JpegColorspaceError("jpeg can't have an alpha channel")
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im.close()
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return [(color, ndpi, imgformat, rawdata, imgwidthpx, imgheightpx, [], False)]
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return [(color, ndpi, imgformat, rawdata, imgwidthpx, imgheightpx, [],
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False)]
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# We can directly embed the IDAT chunk of PNG images if the PNG is not
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# interlaced
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@ -810,26 +820,29 @@ def read_images(rawdata, colorspace, first_frame_only=False):
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imgdata, imgformat, default_dpi, colorspace, rawdata)
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pngidat, palette = parse_png(rawdata)
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im.close()
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return [(color, ndpi, imgformat, pngidat, imgwidthpx, imgheightpx, palette, False)]
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return [(color, ndpi, imgformat, pngidat, imgwidthpx, imgheightpx,
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palette, False)]
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# We can directly copy the data out of a CCITT Group 4 encoded TIFF, if it
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# only contains a single strip
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if imgformat == ImageFormat.TIFF \
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and imgdata.info['compression'] == "group4" \
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and len(imgdata.tag_v2[TiffImagePlugin.STRIPOFFSETS]) == 1:
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and imgdata.info['compression'] == "group4" \
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and len(imgdata.tag_v2[TiffImagePlugin.STRIPOFFSETS]) == 1:
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photo = imgdata.tag_v2[TiffImagePlugin.PHOTOMETRIC_INTERPRETATION]
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inverted = False
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if photo == 0:
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inverted = True
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elif photo != 1:
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raise ValueError("unsupported photometric interpretation for group4 tiff: %d" % photo)
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raise ValueError("unsupported photometric interpretation for "
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"group4 tiff: %d" % photo)
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color, ndpi, imgwidthpx, imgheightpx = get_imgmetadata(
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imgdata, imgformat, default_dpi, colorspace, rawdata)
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offset, length = ccitt_payload_location_from_pil(imgdata)
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im.seek(offset)
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rawdata = im.read(length)
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im.close()
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return [(color, ndpi, ImageFormat.CCITTGroup4, rawdata, imgwidthpx, imgheightpx, [], inverted)]
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return [(color, ndpi, ImageFormat.CCITTGroup4, rawdata, imgwidthpx,
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imgheightpx, [], inverted)]
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# Everything else has to be encoded
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@ -869,7 +882,8 @@ def read_images(rawdata, colorspace, first_frame_only=False):
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logging.debug("Colorspace is OK: %s", color)
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newimg = imgdata
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else:
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raise ValueError("unknown or unsupported colorspace: %s" % color.name)
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raise ValueError("unknown or unsupported colorspace: %s"
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% color.name)
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# the PNG format does not support CMYK, so we fall back to normal
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# compression
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if color in [Colorspace.CMYK, Colorspace["CMYK;I"]]:
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@ -1194,7 +1208,7 @@ def convert(*images, **kwargs):
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try:
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with open(img, "rb") as f:
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rawdata = f.read()
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except:
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except Exception:
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# whatever the exception is (string could contain NUL
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# characters or the path could just not exist) it's not a file
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# name so we now try treating it as raw image content
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@ -1698,7 +1712,7 @@ RGB.''')
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"to prevent decompression bomb denial of service attacks. If "
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"your input image contains more pixels than that, use this "
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"option to disable this safety measure during this run of img2pdf"
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%Image.MAX_IMAGE_PIXELS)
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% Image.MAX_IMAGE_PIXELS)
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sizeargs = parser.add_argument_group(
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title='Image and page size and layout arguments',
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@ -592,13 +592,17 @@ def test_suite():
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if imgprops.DecodeParms:
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if orig_img.format == 'PNG':
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pngidat, palette = img2pdf.parse_png(orig_imgdata)
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elif orig_img.format == 'TIFF' and orig_img.info['compression'] == "group4":
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offset, length = img2pdf.ccitt_payload_location_from_pil(orig_img)
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elif orig_img.format == 'TIFF' \
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and orig_img.info['compression'] == "group4":
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offset, length = \
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img2pdf.ccitt_payload_location_from_pil(
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orig_img)
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pngidat = orig_imgdata[offset:offset+length]
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else:
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pngbuffer = BytesIO()
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orig_img.save(pngbuffer, format="png")
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pngidat, palette = img2pdf.parse_png(pngbuffer.getvalue())
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pngidat, palette = img2pdf.parse_png(
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pngbuffer.getvalue())
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self.assertEqual(zlib.decompress(pngidat), imgdata)
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else:
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colorspace = imgprops.ColorSpace
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@ -610,17 +614,19 @@ def test_suite():
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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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im = Image.frombytes(colorspace,
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(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(),
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orig_img.convert("L").tobytes())
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elif orig_img.mode not in ("RGB", "L", "CMYK", "CMYK;I"):
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elif orig_img.mode not in ("RGB", "L", "CMYK",
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"CMYK;I"):
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self.assertEqual(im.tobytes(),
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orig_img.convert("RGB").tobytes())
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# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does not
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# have the close() method
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# the python-pil version 2.3.0-1ubuntu3 in Ubuntu does
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# not have the close() method
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try:
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im.close()
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except AttributeError:
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