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Ignore subset failure when generating PDF

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Kovid Goyal 2020-12-12 17:19:38 +05:30
parent 0348bf9ad5
commit e9b6e53ef1
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1 changed files with 5 additions and 1 deletions
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src/calibre/ebooks/pdf/html_writer.py
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@ -34,6 +34,7 @@ from calibre.gui2 import setup_unix_signals
from calibre.gui2.webengine import secure_webengine
from calibre.srv.render_book import check_for_maths
from calibre.utils.fonts.sfnt.container import Sfnt, UnsupportedFont
from calibre.utils.fonts.sfnt.errors import NoGlyphs
from calibre.utils.fonts.sfnt.merge import merge_truetype_fonts_for_pdf
from calibre.utils.fonts.sfnt.subset import pdf_subset
from calibre.utils.logging import default_log
@ -742,7 +743,10 @@ def merge_font_files(fonts, log):
glyph_ids = all_glyph_ids_in_w_arrays(w_arrays, as_set=True)
h_arrays = tuple(filter(None, (f['W2'] for f in descendant_fonts)))
glyph_ids |= all_glyph_ids_in_w_arrays(h_arrays, as_set=True)
try:
pdf_subset(merged_sfnt, glyph_ids)
except NoGlyphs:
log.warn(f'Subsetting of {fonts[0]["BaseFont"]} failed with no glyphs found, ignoring')
font_data = merged_sfnt()[0]
log(f'Merged {len(fonts)} instances of {fonts[0]["BaseFont"]} reducing size from {human_readable(total_size)} to {human_readable(len(font_data))}')
return font_data, tuple(f['Reference'] for f in descendant_fonts)