shadowfacts/fonttools
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Specify max error in em instead of font units

Browse Source 
This should be more compatible between fonts with different UPM. In
fact, it should work within a single call with such fonts.

The default max error is now 0.0025 em, which is about 5 units for a
2048 UPM font.
This commit is contained in:
jamesgk 2015-11-20 12:04:16 -08:00
parent 8bbdb47cf5
commit e94071a2d8
2 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Lib/cu2qu/geometry.py
View File

@ -146,13 +146,13 @@ def curve_to_quadratic(p, max_n, max_err):
return spline return spline
def curves_to_quadratic(curves, max_n, max_err): def curves_to_quadratic(curves, max_n, max_errors):
"""Return quadratic splines approximating these cubic beziers.""" """Return quadratic splines approximating these cubic beziers."""
for n in range(1, max_n + 1): for n in range(1, max_n + 1):
splines = [cubic_approx_spline(c, n) for c in curves] splines = [cubic_approx_spline(c, n) for c in curves]
if (all(splines) and if (all(splines) and
max(curve_spline_dist(c, s) all(curve_spline_dist(c, s) < max_err
for c, s in zip(curves, splines)) <= max_err): for c, s, max_err in zip(curves, splines, max_errors))):
break break
return splines return splines

5
Lib/cu2qu/rf.py
View File

@ -47,11 +47,12 @@ def fonts_to_quadratic(*fonts, **kwargs):
""" """
max_n = kwargs.get('max_n', 10) max_n = kwargs.get('max_n', 10)
max_err = kwargs.get('max_err', 5) max_err = kwargs.get('max_err', 0.0025)
max_errors = [f.info.unitsPerEm * max_err for f in fonts]
report = {} report = {}
for glyph in FontCollection(fonts): for glyph in FontCollection(fonts):
glyph_to_quadratic(glyph, max_n, max_err, report) glyph_to_quadratic(glyph, max_n, max_errors, report)
spline_lengths = report.keys() spline_lengths = report.keys()
spline_lengths.sort() spline_lengths.sort()