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Backport PR #22284 on branch v3.5.x (Specify font number for TTC font subsetting) #22846

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Merged
merged 1 commit into from
Apr 14, 2022
Merged

Backport PR #22284 on branch v3.5.x (Specify font number for TTC font subsetting) #22846

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6 changes: 5 additions & 1 deletion lib/matplotlib/backends/_backend_pdf_ps.py
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,11 @@ def get_glyphs_subset(fontfile, characters):
options = subset.Options(glyph_names=True, recommended_glyphs=True)

# prevent subsetting FontForge Timestamp and other tables
options.drop_tables += ['FFTM', 'PfEd']
options.drop_tables += ['FFTM', 'PfEd', 'BDF']

# if fontfile is a ttc, specify font number
if fontfile.endswith(".ttc"):
options.font_number = 0

with subset.load_font(fontfile, options) as font:
subsetter = subset.Subsetter(options=options)
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15 changes: 12 additions & 3 deletions lib/matplotlib/tests/test_backend_pdf.py
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Expand Up @@ -12,6 +12,7 @@
from matplotlib import dviread, pyplot as plt, checkdep_usetex, rcParams
from matplotlib.cbook import _get_data_path
from matplotlib.ft2font import FT2Font
from matplotlib.font_manager import findfont, FontProperties
from matplotlib.backends._backend_pdf_ps import get_glyphs_subset
from matplotlib.backends.backend_pdf import PdfPages

Expand Down Expand Up @@ -43,12 +44,20 @@ def test_use14corefonts():
ax.axhline(0.5, linewidth=0.5)


def test_type42():
rcParams['pdf.fonttype'] = 42
@pytest.mark.parametrize('fontname, fontfile', [
('DejaVu Sans', 'DejaVuSans.ttf'),
('WenQuanYi Zen Hei', 'wqy-zenhei.ttc'),
])
@pytest.mark.parametrize('fonttype', [3, 42])
def test_embed_fonts(fontname, fontfile, fonttype):
if Path(findfont(FontProperties(family=[fontname]))).name != fontfile:
pytest.skip(f'Font {fontname!r} may be missing')

rcParams['pdf.fonttype'] = fonttype
fig, ax = plt.subplots()
ax.plot([1, 2, 3])
fig.savefig(io.BytesIO())
ax.set_title('Axes Title', font=fontname)
fig.savefig(io.BytesIO(), format='pdf')


def test_multipage_pagecount():
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