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| from fontTools.misc.roundTools import noRound | |
| from fontTools.ttLib import TTFont, newTable | |
| from fontTools.ttLib.tables import otTables as ot | |
| from fontTools.ttLib.tables.otBase import OTTableWriter | |
| from fontTools.varLib import HVAR_FIELDS, VVAR_FIELDS, _add_VHVAR | |
| from fontTools.varLib import builder, models, varStore | |
| from fontTools.misc.fixedTools import fixedToFloat as fi2fl | |
| from fontTools.misc.cliTools import makeOutputFileName | |
| from functools import partial | |
| import logging | |
| log = logging.getLogger("fontTools.varLib.avar") | |
| def _get_advance_metrics(font, axisTags, tableFields): | |
| # There's two ways we can go from here: | |
| # 1. For each glyph, at each master peak, compute the value of the | |
| # advance width at that peak. Then pass these all to a VariationModel | |
| # builder to compute back the deltas. | |
| # 2. For each master peak, pull out the deltas of the advance width directly, | |
| # and feed these to the VarStoreBuilder, forgoing the remodeling step. | |
| # We'll go with the second option, as it's simpler, faster, and more direct. | |
| gvar = font["gvar"] | |
| vhAdvanceDeltasAndSupports = {} | |
| glyphOrder = font.getGlyphOrder() | |
| phantomIndex = tableFields.phantomIndex | |
| for glyphName in glyphOrder: | |
| supports = [] | |
| deltas = [] | |
| variations = gvar.variations.get(glyphName, []) | |
| for tv in variations: | |
| supports.append(tv.axes) | |
| phantoms = tv.coordinates[-4:] | |
| phantoms = phantoms[phantomIndex * 2 : phantomIndex * 2 + 2] | |
| assert len(phantoms) == 2 | |
| phantoms[0] = phantoms[0][phantomIndex] if phantoms[0] is not None else 0 | |
| phantoms[1] = phantoms[1][phantomIndex] if phantoms[1] is not None else 0 | |
| deltas.append(phantoms[1] - phantoms[0]) | |
| vhAdvanceDeltasAndSupports[glyphName] = (deltas, supports) | |
| vOrigDeltasAndSupports = None # TODO | |
| return vhAdvanceDeltasAndSupports, vOrigDeltasAndSupports | |
| def add_HVAR(font): | |
| if "HVAR" in font: | |
| del font["HVAR"] | |
| axisTags = [axis.axisTag for axis in font["fvar"].axes] | |
| getAdvanceMetrics = partial(_get_advance_metrics, font, axisTags, HVAR_FIELDS) | |
| _add_VHVAR(font, axisTags, HVAR_FIELDS, getAdvanceMetrics) | |
| def add_VVAR(font): | |
| if "VVAR" in font: | |
| del font["VVAR"] | |
| getAdvanceMetrics = partial(_get_advance_metrics, font, axisTags, HVAR_FIELDS) | |
| axisTags = [axis.axisTag for axis in font["fvar"].axes] | |
| _add_VHVAR(font, axisTags, VVAR_FIELDS, getAdvanceMetrics) | |
| def main(args=None): | |
| """Add `HVAR` table to variable font.""" | |
| if args is None: | |
| import sys | |
| args = sys.argv[1:] | |
| from fontTools import configLogger | |
| from fontTools.designspaceLib import DesignSpaceDocument | |
| import argparse | |
| parser = argparse.ArgumentParser( | |
| "fonttools varLib.hvar", | |
| description="Add `HVAR` table from to variable font.", | |
| ) | |
| parser.add_argument("font", metavar="varfont.ttf", help="Variable-font file.") | |
| parser.add_argument( | |
| "-o", | |
| "--output-file", | |
| type=str, | |
| help="Output font file name.", | |
| ) | |
| options = parser.parse_args(args) | |
| configLogger(level="WARNING") | |
| font = TTFont(options.font) | |
| if not "fvar" in font: | |
| log.error("Not a variable font.") | |
| return 1 | |
| add_HVAR(font) | |
| if "vmtx" in font: | |
| add_VVAR(font) | |
| if options.output_file is None: | |
| outfile = makeOutputFileName(options.font, overWrite=True, suffix=".hvar") | |
| else: | |
| outfile = options.output_file | |
| if outfile: | |
| log.info("Saving %s", outfile) | |
| font.save(outfile) | |
| if __name__ == "__main__": | |
| import sys | |
| sys.exit(main()) | |