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Adds font metrics to support font commands.

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This is part 1 of 3.  Rendering, screenshots, MathML, and unit tests will
follow in susbequent pull requests.
This commit is contained in:
Kevin Barabash
2015-07-04 15:20:05 -06:00
parent 549c2bf858
commit 67147b18ac
6 changed files with 579 additions and 15 deletions
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14
metrics/parse_tfm.py
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@@ -64,11 +64,21 @@ class TfmFile(object):
self.ligkern_program = LigKernProgram(ligkern_table)
self.kern_table = kern_table
def get_char_metrics(self, char_num):
def get_char_metrics(self, char_num, fix_rsfs=False):
"""Return glyph metrics for a unicode code point.
Arguments:
char_num: a unicode code point
fix_rsfs: adjust for rsfs10.tfm's different indexing system
"""
if char_num < self.start_char or char_num > self.end_char:
raise RuntimeError("Invalid character number")
info = self.char_info[char_num + self.start_char]
if fix_rsfs:
# all of the char_nums contained start from zero in rsfs10.tfm
info = self.char_info[char_num - self.start_char]
else:
info = self.char_info[char_num + self.start_char]
char_kern_table = {}
if info.has_ligkern():