scribble-math/metrics/extract_ttfs.py
Emily Eisenberg 6ee2ecf47e Add \dots commands
Add all of the \dots commands, and import their metrics from the ttf files.

Fixes #23

Auditors: alpert
2014-09-12 15:02:18 -07:00

52 lines
1.2 KiB
Python
Executable File

#!/usr/bin/env python
import fontforge
import sys
import json
metrics_to_extract = {
"Main-Regular": [
u"\u2260",
u"\u2245",
u"\u0020",
u"\u00a0",
u"\u2026",
u"\u22ef",
u"\u22f1",
u"\u22ee",
]
}
def main():
start_json = json.load(sys.stdin)
for font, chars in metrics_to_extract.iteritems():
fontInfo = fontforge.open("../static/fonts/KaTeX_" + font + ".ttf")
for glyph in fontInfo.glyphs():
try:
char = unichr(glyph.unicode)
except ValueError:
continue
if char in chars:
_, depth, _, height = glyph.boundingBox()
depth = -depth
# TODO(emily): Figure out a real way to calculate this
italic = 0
start_json[font][ord(char)] = {
height: height / fontInfo.em,
depth: depth / fontInfo.em,
italic: italic / fontInfo.em,
}
sys.stdout.write(
json.dumps(start_json, separators=(',', ':'), sort_keys=True))
if __name__ == "__main__":
main()