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Fix #1068 PDF cover Images inverted or incorrect single image grabbed from cover page

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pull/1085/head
Ozzieisaacs 5 years ago
parent 6f61e80c97
commit a7ab7fcf06
2 changed files with 7 additions and 118 deletions
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6
cps/helper.py
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@ -54,7 +54,7 @@ except ImportError:
use_unidecode = False
try:
from PIL import Image
from PIL import Image as PILImage
use_PIL = True
except ImportError:
use_PIL = False
@ -497,9 +497,9 @@ def save_cover(img, book_path):
# convert to jpg because calibre only supports jpg
if content_type in ('image/png', 'image/webp'):
if hasattr(img,'stream'):
imgc = Image.open(img.stream)
imgc = PILImage.open(img.stream)
else:
imgc = Image.open(io.BytesIO(img.content))
imgc = PILImage.open(io.BytesIO(img.content))
im = imgc.convert('RGB')
tmp_bytesio = io.BytesIO()
im.save(tmp_bytesio, format='JPEG')

119
cps/uploader.py
Unescape Escape View File

@ -20,11 +20,7 @@
from __future__ import division, print_function, unicode_literals
import os
import hashlib
import struct
from tempfile import gettempdir
from flask_babel import gettext as _
from . import logger, comic
from .constants import BookMeta
@ -69,16 +65,13 @@ except ImportError as e:
use_fb2_meta = False
try:
from PIL import Image, ImageOps
from PIL import PILImage
from PIL import __version__ as PILversion
use_PIL = True
except ImportError as e:
log.debug('cannot import Pillow, using png and webp images as cover will not work: %s', e)
use_generic_pdf_cover = True
use_PIL = False
__author__ = 'lemmsh'
@ -146,119 +139,15 @@ def pdf_meta(tmp_file_path, original_file_name, original_file_extension):
languages="")
def CMYKInvert(img):
return Image.merge(img.mode,[ImageOps.invert(b.convert('L')) for b in img.split()])
def tiff_header_for_CCITT(width, height, img_size, CCITT_group=4):
tiff_header_struct = '<' + '2s' + 'h' + 'l' + 'h' + 'hhll' * 8 + 'h'
return struct.pack(tiff_header_struct,
b'II', # Byte order indication: Little indian
42, # Version number (always 42)
8, # Offset to first IFD
8, # Number of tags in IFD
256, 4, 1, width, # ImageWidth, LONG, 1, width
257, 4, 1, height, # ImageLength, LONG, 1, lenght
258, 3, 1, 1, # BitsPerSample, SHORT, 1, 1
259, 3, 1, CCITT_group, # Compression, SHORT, 1, 4 = CCITT Group 4 fax encoding
262, 3, 1, 0, # Threshholding, SHORT, 1, 0 = WhiteIsZero
273, 4, 1, struct.calcsize(tiff_header_struct), # StripOffsets, LONG, 1, len of header
278, 4, 1, height, # RowsPerStrip, LONG, 1, lenght
279, 4, 1, img_size, # StripByteCounts, LONG, 1, size of image
0 # last IFD
)
def pdf_preview(tmp_file_path, tmp_dir):
if use_generic_pdf_cover:
return None
else:
if use_PIL:
try:
input1 = PdfFileReader(open(tmp_file_path, 'rb'), strict=False)
page0 = input1.getPage(0)
mediaBox = page0['/MediaBox']
box = page0['/CropBox'] if '/CropBox' in page0 else mediaBox
xObject = page0['/Resources']['/XObject'].getObject()
for obj in xObject:
if xObject[obj]['/Subtype'] == '/Image':
size = (xObject[obj]['/Width'], xObject[obj]['/Height'])
data = xObject[obj]._data
mode = "P"
if xObject[obj]['/ColorSpace'] == '/DeviceRGB':
mode = "RGB"
if xObject[obj]['/ColorSpace'] == '/DeviceCMYK':
mode = "CMYK"
if '/Filter' in xObject[obj]:
if xObject[obj]['/Filter'] == '/FlateDecode':
img = Image.frombytes(mode, size, data)
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.png"
img.save(filename=os.path.join(tmp_dir, cover_file_name))
return cover_file_name
# img.save(obj[1:] + ".png")
elif xObject[obj]['/Filter'] == '/DCTDecode':
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
img = open(cover_file_name, "wb")
img.write(data)
img.close()
# Post processing
img2 = Image.open(cover_file_name)
width, height = img2.size
if mode == 'CMYK':
img2 = CMYKInvert(img2)
img2 = img2.crop((box[0]/mediaBox[2]*width,
box[1]/mediaBox[3]*height,
box[2]/mediaBox[2]*width,
box[3]/mediaBox[3]*height))
img2.save(cover_file_name)
return cover_file_name
elif xObject[obj]['/Filter'] == '/JPXDecode':
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jp2"
img = open(cover_file_name, "wb")
img.write(data)
img.close()
# Post processing
img2 = Image.open(cover_file_name)
width, height = img2.size
if mode == 'CMYK':
img2 = CMYKInvert(img2)
img2 = img2.crop((box[0]/mediaBox[2]*width,
box[1]/mediaBox[3]*height,
box[2]/mediaBox[2]*width,
box[3]/mediaBox[3]*height))
img2.save(cover_file_name)
return cover_file_name
elif xObject[obj]['/Filter'] == '/CCITTFaxDecode':
if xObject[obj]['/DecodeParms']['/K'] == -1:
CCITT_group = 4
else:
CCITT_group = 3
width = xObject[obj]['/Width']
height = xObject[obj]['/Height']
img_size = len(data)
tiff_header = tiff_header_for_CCITT(width, height, img_size, CCITT_group)
cover_file_name_tiff = os.path.splitext(tmp_file_path)[0] + obj[1:] + '.tiff'
cover_file_name = os.path.splitext(tmp_file_path)[0] + obj[1:] + '.jpg'
img = open(cover_file_name_tiff, "wb")
img.write(tiff_header + data)
img.close()
# Post processing
img2 = Image.open(cover_file_name_tiff)
if img2.mode == '1':
img2 = ImageOps.invert(img2.convert('RGB'))
img2.save(cover_file_name)
return cover_file_name
else:
img = Image.frombytes(mode, size, data)
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.png"
img.save(filename=os.path.join(tmp_dir, cover_file_name))
return cover_file_name
# img.save(obj[1:] + ".png")
except Exception as ex:
print(ex)
try:
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
with Image(filename=tmp_file_path + "[0]", resolution=150) as img:
with Image() as img:
img.options["pdf:use-cropbox"] = "true"
img.read(filename=tmp_file_path + '[0]', resolution = 150)
img.compression_quality = 88
img.save(filename=os.path.join(tmp_dir, cover_file_name))
return cover_file_name

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