def gen_glyphs(ttfont, out):
math = ttfont['MATH'].table
cmap = ttfont['cmap'].getcmap(3, 10).cmap
glyphs = ttfont.getGlyphSet()
metrics = { name: {
"usv": codepoint,
"xmin": 0,
"ymin": 0,
"xmax": 0,
"ymax": 0,
"attachment": 0,
"italics": 0,
"advance": 0,
"lsb": 0,
} for codepoint, name in cmap.items() }
# Gather bounding box information
pen = BoundsPen(None)
for glyph in cmap.values():
bbox = (0, 0, 0, 0)
glyphs.get(glyph).draw(pen)
if pen.bounds is not None:
(xmin, ymin, xmax, ymax) = pen.bounds
bbox = (int(xmin), int(ymin), int(xmax), int(ymax))
metrics[glyph]['xmin'] = bbox[0]
metrics[glyph]['ymin'] = bbox[1]
metrics[glyph]['xmax'] = bbox[2]
metrics[glyph]['ymax'] = bbox[3]
pen.bounds = None
pen._start = None
# Gather accent attachment
accent_table = math.MathGlyphInfo.MathTopAccentAttachment
accent_coverage = accent_table.TopAccentCoverage.glyphs
for glyph in accent_coverage:
value = accent_table \
.TopAccentAttachment[accent_coverage.index(glyph)] \
.Value
metrics[glyph]["attachment"] = value
# Gather italics offsets
italics_table = math.MathGlyphInfo.MathItalicsCorrectionInfo
italics_coverage = italics_table.Coverage.glyphs
for glyph in italics_coverage:
value = italics_table \
.ItalicsCorrection[italics_coverage.index(glyph)] \
.Value
metrics[glyph]["italics"] = value
# Gather advance and left side bearing
hmtx = ttfont['hmtx'].metrics
for glyph in cmap.values():
(advance, lsb) = hmtx[glyph]
metrics[glyph]["advance"] = advance
metrics[glyph]["lsb"] = lsb
# Insert shim
shim = []
cmap = ttfont['cmap'].getcmap(3, 10).cmap
for (new, old) in SHIM:
if old in cmap:
name = cmap[old]
data = deepcopy(metrics[name])
shim.append((new, data))
else:
print("Ignoring shim for", hex(old))
template = Template(filename="tools/mako/glyphs.mako.rs")
with open(out + "glyphs.rs", 'w') as file:
file.write(template.render(glyphs=metrics, shim=shim))
