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RTF Output: Fix a regression that slowed down conversion. Fixes #1857732 [RTF Conversion Failure](https://bugs.launchpad.net/calibre/+bug/1857732)

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Kovid Goyal 2019-12-28 12:36:59 +05:30
parent c4afe06792
commit 4c2d255d86
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 7 additions and 16 deletions
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23
src/calibre/ebooks/rtf/rtfml.py
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@ -12,6 +12,7 @@ Transform OEB content into RTF markup
import os import os
import re import re
import io import io
from binascii import hexlify
from lxml import etree from lxml import etree
@ -184,24 +185,14 @@ class RTFMLizer(object):
return text return text
def image_to_hexstring(self, data): def image_to_hexstring(self, data):
# Images must be hex-encoded in 128 character lines
data = save_cover_data_to(data) data = save_cover_data_to(data)
width, height = identify(data)[1:] width, height = identify(data)[1:]
lines = []
raw_hex = '' v = memoryview(data)
for char in bytearray(data): for i in range(0, len(data), 64):
raw_hex += hex(char).replace('0x', '').rjust(2, '0') lines.append(hexlify(v[i:i+64]))
hex_string = b'\n'.join(lines).decode('ascii')
# Images must be broken up so that they are no longer than 129 chars
# per line
hex_string = ''
col = 1
for char in raw_hex:
if col == 129:
hex_string += '\n'
col = 1
col += 1
hex_string += char
return hex_string, width, height return hex_string, width, height
def clean_text(self, text): def clean_text(self, text):