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OTF subsetting basically works, but leaves behind invalid entries in the GPOS table, which should be ignored by most user agents

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This commit is contained in:
Kovid Goyal 2012-11-09 12:34:05 +05:30
parent 98f4cbb7e3
commit 18a3257f5d
4 changed files with 8 additions and 10 deletions
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4
src/calibre/ebooks/conversion/plumber.py
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@ -210,9 +210,7 @@ OptionRecommendation(name='subset_embedded_fonts',
'Subset all embedded fonts. Every embedded font is reduced ' 'Subset all embedded fonts. Every embedded font is reduced '
'to contain only the glyphs used in this document. This decreases ' 'to contain only the glyphs used in this document. This decreases '
'the size of the font files. Useful if you are embedding a ' 'the size of the font files. Useful if you are embedding a '
'particularly large font with lots of unused glyphs. Note that ' 'particularly large font with lots of unused glyphs.')
'subsetting is only supported for fonts that contain TrueType '
'outlines, not Postscript outlines.')
), ),
OptionRecommendation(name='linearize_tables', OptionRecommendation(name='linearize_tables',

4
src/calibre/gui2/convert/look_and_feel.ui
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@ -6,7 +6,7 @@
<rect> <rect>
<x>0</x> <x>0</x>
<y>0</y> <y>0</y>
<width>655</width> <width>699</width>
<height>619</height> <height>619</height>
</rect> </rect>
</property> </property>
@ -411,7 +411,7 @@
<item row="6" column="3" colspan="2"> <item row="6" column="3" colspan="2">
<widget class="QCheckBox" name="opt_subset_embedded_fonts"> <widget class="QCheckBox" name="opt_subset_embedded_fonts">
<property name="text"> <property name="text">
<string>&amp;Subset all embedded fonts</string> <string>&amp;Subset all embedded fonts (Experimental)</string>
</property> </property>
</widget> </widget>
</item> </item>

8
src/calibre/utils/fonts/sfnt/cff/writer.py
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@ -107,7 +107,7 @@ class Subset(object):
def __init__(self, cff, keep_charnames): def __init__(self, cff, keep_charnames):
self.cff = cff self.cff = cff
self.keep_charnames = keep_charnames keep_charnames.add(b'.notdef')
header = pack(b'>4B', 1, 0, 4, cff.offset_size) header = pack(b'>4B', 1, 0, 4, cff.offset_size)
@ -127,9 +127,9 @@ class Subset(object):
cname = self.cff.charset.safe_lookup(i) cname = self.cff.charset.safe_lookup(i)
if cname in keep_charnames: if cname in keep_charnames:
char_strings.append(self.cff.char_strings[i]) char_strings.append(self.cff.char_strings[i])
self.charname_map[cname] = i self.charname_map[cname] = len(self.charname_map)
if i > 0: # .notdef is not included if i > 0: # .notdef is not included
charsets.append(cname) charsets.append(cname)
# Add the strings # Add the strings
char_strings.compile() char_strings.compile()

2
src/calibre/utils/fonts/sfnt/subset.py
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@ -167,7 +167,7 @@ def main(args):
with open(iff, 'rb') as f: with open(iff, 'rb') as f:
orig = f.read() orig = f.read()
chars = [x.strip() for x in chars.split(',')] chars = [x for x in chars.split(',')]
individual, ranges = set(), set() individual, ranges = set(), set()
def not_single(c): def not_single(c):