def _font_to_ps_type42(font_path, chars, fh):
"""
Subset *chars* from the font at *font_path* into a Type 42 font at *fh*.
Parameters
----------
font_path : path-like
Path to the font to be subsetted.
chars : str
The characters to include in the subsetted font.
fh : file-like
Where to write the font.
"""
subset_str = ''.join(chr(c) for c in chars)
_log.debug("SUBSET %s characters: %s", font_path, subset_str)
try:
fontdata = _backend_pdf_ps.get_glyphs_subset(font_path, subset_str)
_log.debug("SUBSET %s %d -> %d", font_path,
os.stat(font_path).st_size,
fontdata.getbuffer().nbytes)
# Give ttconv a subsetted font along with updated glyph_ids.
font = FT2Font(fontdata)
glyph_ids = [font.get_char_index(c) for c in chars]
with TemporaryDirectory() as tmpdir:
tmpfile = os.path.join(tmpdir, "tmp.ttf")
with open(tmpfile, 'wb') as tmp:
tmp.write(fontdata.getvalue())
# TODO: allow convert_ttf_to_ps to input file objects (BytesIO)
convert_ttf_to_ps(os.fsencode(tmpfile), fh, 42, glyph_ids)
except RuntimeError:
_log.warning("The PostScript backend does not currently "
"support the selected font.")
raise
def print_figure_impl(fh):
# write the PostScript headers
if is_eps:
print("%!PS-Adobe-3.0 EPSF-3.0", file=fh)
else:
print(f"%!PS-Adobe-3.0\n"
f"%%DocumentPaperSizes: {papertype}\n"
f"%%Pages: 1\n",
end="", file=fh)
print(f"{dsc_comments}\n"
f"%%Orientation: {orientation.name}\n"
f"%%BoundingBox: {bbox[0]} {bbox[1]} {bbox[2]} {bbox[3]}\n"
f"%%EndComments\n",
end="", file=fh)
Ndict = len(psDefs)
print("%%BeginProlog", file=fh)
if not mpl.rcParams['ps.useafm']:
Ndict += len(ps_renderer._character_tracker.used)
print("/mpldict %d dict def" % Ndict, file=fh)
print("mpldict begin", file=fh)
print("\n".join(psDefs), file=fh)
if not mpl.rcParams['ps.useafm']:
for font_path, chars \
in ps_renderer._character_tracker.used.items():
if not chars:
continue
font = get_font(font_path)
glyph_ids = [font.get_char_index(c) for c in chars]
fonttype = mpl.rcParams['ps.fonttype']
# Can't use more than 255 chars from a single Type 3 font.
if len(glyph_ids) > 255:
fonttype = 42
# The ttf to ps (subsetting) support doesn't work for
# OpenType fonts that are Postscript inside (like the STIX
# fonts). This will simply turn that off to avoid errors.
if is_opentype_cff_font(font_path):
raise RuntimeError(
"OpenType CFF fonts can not be saved using "
"the internal Postscript backend at this "
"time; consider using the Cairo backend")
fh.flush()
try:
convert_ttf_to_ps(os.fsencode(font_path),
fh, fonttype, glyph_ids)
except RuntimeError:
_log.warning("The PostScript backend does not "
"currently support the selected font.")
raise
print("end", file=fh)
print("%%EndProlog", file=fh)
if not is_eps:
print("%%Page: 1 1", file=fh)
print("mpldict begin", file=fh)
print("%s translate" % _nums_to_str(xo, yo), file=fh)
if rotation:
print("%d rotate" % rotation, file=fh)
print("%s clipbox" % _nums_to_str(width*72, height*72, 0, 0),
file=fh)
# write the figure
print(self._pswriter.getvalue(), file=fh)
# write the trailer
print("end", file=fh)
print("showpage", file=fh)
if not is_eps:
print("%%EOF", file=fh)
fh.flush()
def print_figure_impl(fh):
# write the PostScript headers
if is_eps:
print("%!PS-Adobe-3.0 EPSF-3.0", file=fh)
else:
print(
f"%!PS-Adobe-3.0\n"
f"%%DocumentPaperSizes: {papertype}\n"
f"%%Pages: 1\n",
end="",
file=fh)
print(
f"{dsc_comments}\n"
f"%%Orientation: {orientation.name}\n"
f"{get_bbox_header(bbox)[0]}\n"
f"%%EndComments\n",
end="",
file=fh)
Ndict = len(psDefs)
print("%%BeginProlog", file=fh)
if not mpl.rcParams['ps.useafm']:
Ndict += len(ps_renderer._character_tracker.used)
print("/mpldict %d dict def" % Ndict, file=fh)
print("mpldict begin", file=fh)
print("\n".join(psDefs), file=fh)
if not mpl.rcParams['ps.useafm']:
for font_path, chars \
in ps_renderer._character_tracker.used.items():
if not chars:
continue
font = get_font(font_path)
glyph_ids = [font.get_char_index(c) for c in chars]
fonttype = mpl.rcParams['ps.fonttype']
# Can't use more than 255 chars from a single Type 3 font.
if len(glyph_ids) > 255:
fonttype = 42
fh.flush()
if fonttype == 3:
fh.write(_font_to_ps_type3(font_path, glyph_ids))
else:
try:
convert_ttf_to_ps(os.fsencode(font_path), fh,
fonttype, glyph_ids)
except RuntimeError:
_log.warning(
"The PostScript backend does not currently "
"support the selected font.")
raise
print("end", file=fh)
print("%%EndProlog", file=fh)
if not is_eps:
print("%%Page: 1 1", file=fh)
print("mpldict begin", file=fh)
print("%s translate" % _nums_to_str(xo, yo), file=fh)
if rotation:
print("%d rotate" % rotation, file=fh)
print("%s clipbox" % _nums_to_str(width * 72, height * 72, 0, 0),
file=fh)
# write the figure
print(self._pswriter.getvalue(), file=fh)
# write the trailer
print("end", file=fh)
print("showpage", file=fh)
if not is_eps:
print("%%EOF", file=fh)
fh.flush()
def print_figure_impl(fh):
# write the PostScript headers
if is_eps:
print("%!PS-Adobe-3.0 EPSF-3.0", file=fh)
else:
print(
f"%!PS-Adobe-3.0\n"
f"%%DocumentPaperSizes: {papertype}\n"
f"%%Pages: 1\n",
end="",
file=fh)
print(
f"{dsc_comments}\n"
f"%%Orientation: {orientation.name}\n"
f"{get_bbox_header(bbox)[0]}\n"
f"%%EndComments\n",
end="",
file=fh)
Ndict = len(psDefs)
print("%%BeginProlog", file=fh)
if not mpl.rcParams['ps.useafm']:
Ndict += len(ps_renderer._character_tracker.used)
print("/mpldict %d dict def" % Ndict, file=fh)
print("mpldict begin", file=fh)
print("\n".join(psDefs), file=fh)
if not mpl.rcParams['ps.useafm']:
for font_path, chars \
in ps_renderer._character_tracker.used.items():
if not chars:
continue
font = get_font(font_path)
glyph_ids = [font.get_char_index(c) for c in chars]
fonttype = mpl.rcParams['ps.fonttype']
# Can't use more than 255 chars from a single Type 3 font.
if len(glyph_ids) > 255:
fonttype = 42
fh.flush()
if fonttype == 3:
fh.write(_font_to_ps_type3(font_path, glyph_ids))
else:
try:
_log.debug("SUBSET %s characters: %s", font_path,
''.join(chr(c) for c in chars))
fontdata = _backend_pdf_ps.get_glyphs_subset(
font_path, "".join(chr(c) for c in chars))
_log.debug("SUBSET %s %d -> %d", font_path,
os.stat(font_path).st_size,
fontdata.getbuffer().nbytes)
# give ttconv a subsetted font
# along with updated glyph_ids
with TemporaryDirectory() as tmpdir:
tmpfile = os.path.join(tmpdir, "tmp.ttf")
font = FT2Font(fontdata)
glyph_ids = [
font.get_char_index(c) for c in chars
]
with open(tmpfile, 'wb') as tmp:
tmp.write(fontdata.getvalue())
tmp.flush()
# TODO: allow convert_ttf_to_ps
# to input file objects (BytesIO)
convert_ttf_to_ps(
os.fsencode(tmpfile),
fh,
fonttype,
glyph_ids,
)
except RuntimeError:
_log.warning(
"The PostScript backend does not currently "
"support the selected font.")
raise
print("end", file=fh)
print("%%EndProlog", file=fh)
if not is_eps:
print("%%Page: 1 1", file=fh)
print("mpldict begin", file=fh)
print("%s translate" % _nums_to_str(xo, yo), file=fh)
if rotation:
print("%d rotate" % rotation, file=fh)
print("%s clipbox" % _nums_to_str(width * 72, height * 72, 0, 0),
file=fh)
# write the figure
print(self._pswriter.getvalue(), file=fh)
# write the trailer
print("end", file=fh)
print("showpage", file=fh)
if not is_eps:
print("%%EOF", file=fh)
fh.flush()
