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https://github.com/janeczku/calibre-web
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Fix #1068 PDF cover Images inverted or incorrect single image grabbed from cover page
This commit is contained in:
Ozzieisaacs
parent
6f61e80c97
commit
a7ab7fcf06
@ -54,7 +54,7 @@ except ImportError:
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use_unidecode = False
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try:
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from PIL import Image
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from PIL import Image as PILImage
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use_PIL = True
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except ImportError:
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use_PIL = False
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@ -497,9 +497,9 @@ def save_cover(img, book_path):
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# convert to jpg because calibre only supports jpg
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if content_type in ('image/png', 'image/webp'):
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if hasattr(img,'stream'):
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imgc = Image.open(img.stream)
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imgc = PILImage.open(img.stream)
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else:
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imgc = Image.open(io.BytesIO(img.content))
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imgc = PILImage.open(io.BytesIO(img.content))
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im = imgc.convert('RGB')
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tmp_bytesio = io.BytesIO()
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im.save(tmp_bytesio, format='JPEG')
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119
cps/uploader.py
119
cps/uploader.py
@ -20,11 +20,7 @@
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from __future__ import division, print_function, unicode_literals
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import os
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import hashlib
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import struct
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from tempfile import gettempdir
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from flask_babel import gettext as _
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from . import logger, comic
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from .constants import BookMeta
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@ -69,16 +65,13 @@ except ImportError as e:
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use_fb2_meta = False
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try:
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from PIL import Image, ImageOps
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from PIL import PILImage
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from PIL import __version__ as PILversion
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use_PIL = True
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except ImportError as e:
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log.debug('cannot import Pillow, using png and webp images as cover will not work: %s', e)
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use_generic_pdf_cover = True
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use_PIL = False
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__author__ = 'lemmsh'
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@ -146,119 +139,15 @@ def pdf_meta(tmp_file_path, original_file_name, original_file_extension):
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languages="")
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def CMYKInvert(img):
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return Image.merge(img.mode,[ImageOps.invert(b.convert('L')) for b in img.split()])
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def tiff_header_for_CCITT(width, height, img_size, CCITT_group=4):
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tiff_header_struct = '<' + '2s' + 'h' + 'l' + 'h' + 'hhll' * 8 + 'h'
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return struct.pack(tiff_header_struct,
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b'II', # Byte order indication: Little indian
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42, # Version number (always 42)
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8, # Offset to first IFD
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8, # Number of tags in IFD
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256, 4, 1, width, # ImageWidth, LONG, 1, width
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257, 4, 1, height, # ImageLength, LONG, 1, lenght
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258, 3, 1, 1, # BitsPerSample, SHORT, 1, 1
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259, 3, 1, CCITT_group, # Compression, SHORT, 1, 4 = CCITT Group 4 fax encoding
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262, 3, 1, 0, # Threshholding, SHORT, 1, 0 = WhiteIsZero
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273, 4, 1, struct.calcsize(tiff_header_struct), # StripOffsets, LONG, 1, len of header
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278, 4, 1, height, # RowsPerStrip, LONG, 1, lenght
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279, 4, 1, img_size, # StripByteCounts, LONG, 1, size of image
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0 # last IFD
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)
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def pdf_preview(tmp_file_path, tmp_dir):
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if use_generic_pdf_cover:
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return None
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else:
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if use_PIL:
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try:
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input1 = PdfFileReader(open(tmp_file_path, 'rb'), strict=False)
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page0 = input1.getPage(0)
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mediaBox = page0['/MediaBox']
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box = page0['/CropBox'] if '/CropBox' in page0 else mediaBox
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xObject = page0['/Resources']['/XObject'].getObject()
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for obj in xObject:
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if xObject[obj]['/Subtype'] == '/Image':
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size = (xObject[obj]['/Width'], xObject[obj]['/Height'])
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data = xObject[obj]._data
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mode = "P"
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if xObject[obj]['/ColorSpace'] == '/DeviceRGB':
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mode = "RGB"
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if xObject[obj]['/ColorSpace'] == '/DeviceCMYK':
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mode = "CMYK"
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if '/Filter' in xObject[obj]:
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if xObject[obj]['/Filter'] == '/FlateDecode':
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img = Image.frombytes(mode, size, data)
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cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.png"
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img.save(filename=os.path.join(tmp_dir, cover_file_name))
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return cover_file_name
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# img.save(obj[1:] + ".png")
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elif xObject[obj]['/Filter'] == '/DCTDecode':
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cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
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img = open(cover_file_name, "wb")
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img.write(data)
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img.close()
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# Post processing
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img2 = Image.open(cover_file_name)
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width, height = img2.size
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if mode == 'CMYK':
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img2 = CMYKInvert(img2)
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img2 = img2.crop((box[0]/mediaBox[2]*width,
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box[1]/mediaBox[3]*height,
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box[2]/mediaBox[2]*width,
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box[3]/mediaBox[3]*height))
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img2.save(cover_file_name)
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return cover_file_name
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elif xObject[obj]['/Filter'] == '/JPXDecode':
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cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jp2"
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img = open(cover_file_name, "wb")
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img.write(data)
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img.close()
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# Post processing
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img2 = Image.open(cover_file_name)
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width, height = img2.size
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if mode == 'CMYK':
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img2 = CMYKInvert(img2)
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img2 = img2.crop((box[0]/mediaBox[2]*width,
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box[1]/mediaBox[3]*height,
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box[2]/mediaBox[2]*width,
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box[3]/mediaBox[3]*height))
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img2.save(cover_file_name)
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return cover_file_name
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elif xObject[obj]['/Filter'] == '/CCITTFaxDecode':
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if xObject[obj]['/DecodeParms']['/K'] == -1:
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CCITT_group = 4
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else:
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CCITT_group = 3
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width = xObject[obj]['/Width']
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height = xObject[obj]['/Height']
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img_size = len(data)
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tiff_header = tiff_header_for_CCITT(width, height, img_size, CCITT_group)
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cover_file_name_tiff = os.path.splitext(tmp_file_path)[0] + obj[1:] + '.tiff'
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cover_file_name = os.path.splitext(tmp_file_path)[0] + obj[1:] + '.jpg'
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img = open(cover_file_name_tiff, "wb")
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img.write(tiff_header + data)
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img.close()
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# Post processing
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img2 = Image.open(cover_file_name_tiff)
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if img2.mode == '1':
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img2 = ImageOps.invert(img2.convert('RGB'))
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img2.save(cover_file_name)
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return cover_file_name
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else:
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img = Image.frombytes(mode, size, data)
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cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.png"
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img.save(filename=os.path.join(tmp_dir, cover_file_name))
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return cover_file_name
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# img.save(obj[1:] + ".png")
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except Exception as ex:
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print(ex)
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try:
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cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
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with Image(filename=tmp_file_path + "[0]", resolution=150) as img:
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with Image() as img:
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img.options["pdf:use-cropbox"] = "true"
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img.read(filename=tmp_file_path + '[0]', resolution = 150)
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img.compression_quality = 88
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img.save(filename=os.path.join(tmp_dir, cover_file_name))
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return cover_file_name
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