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Commit3aaf4c9

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committed
Type-1 subsetting
With this I can produce smaller pdf files with usetex in some smalltests, but this obviously needs more extensive testing, thus markingas draft.On top of#20715.Closes#127.
1 parent9418b35 commit3aaf4c9

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3 files changed

+286
-13
lines changed

3 files changed

+286
-13
lines changed

‎lib/matplotlib/backends/_backend_pdf_ps.py

Lines changed: 15 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -27,14 +27,25 @@ class CharacterTracker:
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def__init__(self):
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self.used= {}
2929

30-
deftrack(self,font,s):
31-
"""Record that string *s* is being typeset usingfont *font*."""
30+
@staticmethod
31+
def_get_name(font):
3232
ifisinstance(font,str):
3333
# Unused, can be removed after removal of track_characters.
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fname=font
35-
else:
35+
elifhasattr(font,'fname'):
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fname=font.fname
37-
self.used.setdefault(fname,set()).update(map(ord,s))
37+
elifhasattr(font,'name'):
38+
fname=font.name
39+
ifisinstance(fname,bytes):
40+
fname=fname.decode('ascii','error')
41+
returnfname
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43+
defget_used(self,font,default=None):
44+
returnself.used.get(self._get_name(font),default)
45+
46+
deftrack(self,font,s):
47+
"""Record that string *s* is being typeset using font *font*."""
48+
self.used.setdefault(self._get_name(font),set()).update(map(ord,s))
3849

3950
# Not public, can be removed when pdf/ps merge_used_characters is removed.
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defmerge(self,other):

‎lib/matplotlib/backends/backend_pdf.py

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -963,6 +963,8 @@ def _embedTeXFont(self, fontinfo):
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t1font=type1font.Type1Font(fontinfo.fontfile)
964964
iffontinfo.effects:
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t1font=t1font.transform(fontinfo.effects)
966+
chars=self._character_tracker.get_used(fontinfo.pdfname)
967+
t1font=t1font.subset(chars)
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fontdict['BaseFont']=Name(t1font.prop['FontName'])
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968970
# Font descriptors may be shared between differently encoded
@@ -2227,6 +2229,7 @@ def draw_tex(self, gc, x, y, s, prop, angle, *, mtext=None):
22272229
seq+= [['font',pdfname,dvifont.size]]
22282230
oldfont=dvifont
22292231
seq+= [['text',x1,y1, [bytes([glyph])],x1+width]]
2232+
self.file._character_tracker.track(pdfname,chr(glyph))
22302233

22312234
# Find consecutive text strings with constant y coordinate and
22322235
# combine into a sequence of strings and kerns, or just one

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