josch/img2pdf
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Add more debugging output

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Johannes 'josch' Schauer 2018-08-16 00:11:07 +02:00
parent fbcaca5e6b
commit a628ed22f9
Signed by: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 11 additions and 0 deletions
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11
src/img2pdf.py
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@ -750,6 +750,9 @@ def ccitt_payload_location_from_pil(img):
(offset, ), (length, ) = strip_offsets, strip_bytes
logging.debug("TIFF strip_offsets: %d" % offset)
logging.debug("TIFF strip_bytes: %d" % length)
return offset, length
@ -838,6 +841,7 @@ def read_images(rawdata, colorspace, first_frame_only=False):
if color == Colorspace['RGBA']:
raise JpegColorspaceError("jpeg can't have an alpha channel")
im.close()
logging.debug("read_images() embeds a JPEG")
return [(color, ndpi, imgformat, rawdata, imgwidthpx, imgheightpx, [],
False)]
@ -853,6 +857,7 @@ def read_images(rawdata, colorspace, first_frame_only=False):
imgdata, imgformat, default_dpi, colorspace, rawdata)
pngidat, palette = parse_png(rawdata)
im.close()
logging.debug("read_images() embeds a PNG")
return [(color, ndpi, imgformat, pngidat, imgwidthpx, imgheightpx,
palette, False)]
@ -882,6 +887,7 @@ def read_images(rawdata, colorspace, first_frame_only=False):
# msb-to-lsb: nothing to do
pass
elif fillorder == 2:
logging.debug("fillorder is lsb-to-msb => reverse bits")
# lsb-to-msb: reverse bits of each byte
rawdata = bytearray(rawdata)
for i in range(len(rawdata)):
@ -889,6 +895,7 @@ def read_images(rawdata, colorspace, first_frame_only=False):
rawdata = bytes(rawdata)
else:
raise ValueError("unsupported FillOrder: %d" % fillorder)
logging.debug("read_images() embeds a TIFF")
return [(color, ndpi, ImageFormat.CCITTGroup4, rawdata, imgwidthpx,
imgheightpx, [], inverted)]
@ -916,6 +923,8 @@ def read_images(rawdata, colorspace, first_frame_only=False):
try:
ccittdata = transcode_monochrome(imgdata)
imgformat = ImageFormat.CCITTGroup4
logging.debug(
"read_images() encoded a B/W image as CCITT group 4")
result.append((color, ndpi, imgformat, ccittdata,
imgwidthpx, imgheightpx, [], False))
img_page_count += 1
@ -936,6 +945,7 @@ def read_images(rawdata, colorspace, first_frame_only=False):
# compression
if color in [Colorspace.CMYK, Colorspace["CMYK;I"]]:
imggz = zlib.compress(newimg.tobytes())
logging.debug("read_images() encoded CMYK with flate compression")
result.append((color, ndpi, imgformat, imggz, imgwidthpx,
imgheightpx, [], False))
else:
@ -946,6 +956,7 @@ def read_images(rawdata, colorspace, first_frame_only=False):
newimg.save(pngbuffer, format="png")
pngidat, palette = parse_png(pngbuffer.getvalue())
imgformat = ImageFormat.PNG
logging.debug("read_images() encoded an image as PNG")
result.append((color, ndpi, imgformat, pngidat, imgwidthpx,
imgheightpx, palette, False))
img_page_count += 1