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[qu2cu] Speed up using generator splitCubicAtTC

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This commit is contained in:
Behdad Esfahbod 2023-02-16 17:32:15 -07:00
parent 822f7a01da
commit 085872d2bc
1 changed files with 12 additions and 5 deletions
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17
Lib/fontTools/qu2cu/qu2cu.py
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@ -177,12 +177,19 @@ def quadratic_to_curves(p, tolerance=0.5):
# Fit elevated_quadratics[j:i] into one cubic
curve, ts = merge_curves(elevated_quadratics[j:i])
reconstructed = splitCubicAtTC(*curve, *ts)
# Knot errors
error = max(
abs(reconst[3] - orig[3])
for reconst, orig in zip(reconstructed, elevated_quadratics[j:i])
)
reconstructed_iter = splitCubicAtTC(*curve, *ts)
reconstructed = []
error = 0
for k, reconst in enumerate(reconstructed_iter):
orig = elevated_quadratics[j + k]
err = abs(reconst[3] - orig[3])
error = max(error, err)
if error > tolerance:
break
reconstructed.append(reconst)
if error > tolerance or not all(
cubic_farthest_fit_inside(
*(v - u for v, u in zip(seg1, seg2)), tolerance