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[varLib.avarPlanner] Use proper logging

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This commit is contained in:
Behdad Esfahbod 2023-07-23 09:29:42 -06:00
parent 3efd204a06
commit a95c084355
1 changed files with 33 additions and 15 deletions
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48
Lib/fontTools/varLib/avarPlanner.py
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@ -2,7 +2,11 @@ from fontTools.ttLib import newTable
from fontTools.pens.areaPen import AreaPen
from fontTools.varLib.models import piecewiseLinearMap
from fontTools.misc.cliTools import makeOutputFileName
from math import exp, log
import math
import logging
from pprint import pformat
log = logging.getLogger("fontTools.varLib.avarPlanner")
WEIGHTS = [
50,
@ -53,7 +57,7 @@ def getGlyphsetBlackness(glyphset, frequencies=None):
def planWeightAxis(
font, minValue, defaultValue, maxValue, weights=WEIGHTS, frequencies=None
):
print("Weight min/default/max:", minValue, defaultValue, maxValue)
log.info("Weight min %g / default %g / max %g", minValue, defaultValue, maxValue)
out = {}
outNormalized = {}
@ -66,7 +70,7 @@ def planWeightAxis(
upem * upem
)
print("Calculated average glyph black ratio:", axisWeightAverage)
log.info("Calculated average glyph black ratio:\n%s", pformat(axisWeightAverage))
outNormalized[-1] = -1
for extremeValue in sorted({minValue, maxValue} - {defaultValue}):
@ -78,31 +82,31 @@ def planWeightAxis(
bias = -1 if extremeValue < defaultValue else 0
print("Planning target weights", sorted(targetWeights))
print("Sampling", SAMPLES, "points in range", rangeMin, rangeMax)
log.info("Planning target weights %s", sorted(targetWeights))
log.info("Sampling %u points in range %g,%g", SAMPLES, rangeMin, rangeMax)
weightBlackness = axisWeightAverage.copy()
for sample in range(1, SAMPLES + 1):
weight = rangeMin + (rangeMax - rangeMin) * sample / (SAMPLES + 1)
print("Sampling weight", weight)
log.info("Sampling weight %g", weight)
glyphset = font.getGlyphSet(location={"wght": weight})
weightBlackness[weight] = getGlyphsetBlackness(glyphset, frequencies) / (
upem * upem
)
print("Sampled average glyph black ratio:", weightBlackness)
log.info("Sampled average glyph black ratio:\n%s", pformat(weightBlackness))
blacknessWeight = {}
for weight in sorted(weightBlackness):
blacknessWeight[weightBlackness[weight]] = weight
logMin = log(weightBlackness[rangeMin])
logMax = log(weightBlackness[rangeMax])
logMin = math.log(weightBlackness[rangeMin])
logMax = math.log(weightBlackness[rangeMax])
out[rangeMin] = rangeMin
outNormalized[bias] = bias
for weight in sorted(targetWeights):
t = (weight - rangeMin) / (rangeMax - rangeMin)
targetBlackness = exp(logMin + t * (logMax - logMin))
targetBlackness = math.exp(logMin + t * (logMax - logMin))
targetWeight = piecewiseLinearMap(targetBlackness, blacknessWeight)
print("Planned mapping weight %g to %g" % (weight, targetWeight))
log.info("Planned mapping weight %g to %g" % (weight, targetWeight))
out[weight] = targetWeight
outNormalized[t + bias] = (targetWeight - rangeMin) / (
rangeMax - rangeMin
@ -117,12 +121,14 @@ def planWeightAxis(
# )
# pyplot.show()
print("Planned mapping:", out)
print("Planned normalized mapping:", outNormalized)
log.info("Planned mapping:\n%s", pformat(out))
log.info("Planned normalized mapping:\n%s", pformat(outNormalized))
return out, outNormalized
def main(args=None):
from fontTools import configLogger
if args is None:
import sys
@ -137,8 +143,20 @@ def main(args=None):
)
parser.add_argument("font", metavar="font.ttf", help="Font file.")
logging_group = parser.add_mutually_exclusive_group(required=False)
logging_group.add_argument(
"-v", "--verbose", action="store_true", help="Run more verbosely."
)
logging_group.add_argument(
"-q", "--quiet", action="store_true", help="Turn verbosity off."
)
options = parser.parse_args(args)
configLogger(
level=("DEBUG" if options.verbose else "ERROR" if options.quiet else "INFO")
)
font = TTFont(options.font)
fvar = font["fvar"]
wghtAxis = slntAxis = None
@ -159,15 +177,15 @@ def main(args=None):
)
if existingMapping is not None:
print("Existing weight mapping:", existingMapping)
log.info("Existing weight mapping:\n%s", pformat(existingMapping))
if "avar" not in font:
font["avar"] = newTable("avar")
avar = font["avar"]
avar.segments["wght"] = mapping
print("Saving font")
outfile = makeOutputFileName(options.font, overWrite=True, suffix=".avar")
log.info("Saving %s", outfile)
font.save(outfile)