diff options
Diffstat (limited to 'Lib/fontTools/varLib/interpolate_layout.py')
| -rw-r--r-- | Lib/fontTools/varLib/interpolate_layout.py | 173 |
1 files changed, 96 insertions, 77 deletions
diff --git a/Lib/fontTools/varLib/interpolate_layout.py b/Lib/fontTools/varLib/interpolate_layout.py index 6d0385dd..aa3f49c6 100644 --- a/Lib/fontTools/varLib/interpolate_layout.py +++ b/Lib/fontTools/varLib/interpolate_layout.py @@ -12,93 +12,112 @@ from pprint import pformat log = logging.getLogger("fontTools.varLib.interpolate_layout") -def interpolate_layout(designspace, loc, master_finder=lambda s:s, mapped=False): - """ - Interpolate GPOS from a designspace file and location. - - If master_finder is set, it should be a callable that takes master - filename as found in designspace file and map it to master font - binary as to be opened (eg. .ttf or .otf). - - If mapped is False (default), then location is mapped using the - map element of the axes in designspace file. If mapped is True, - it is assumed that location is in designspace's internal space and - no mapping is performed. - """ - if hasattr(designspace, "sources"): # Assume a DesignspaceDocument - pass - else: # Assume a file path - from fontTools.designspaceLib import DesignSpaceDocument - designspace = DesignSpaceDocument.fromfile(designspace) - - ds = load_designspace(designspace) - log.info("Building interpolated font") - - log.info("Loading master fonts") - master_fonts = load_masters(designspace, master_finder) - font = deepcopy(master_fonts[ds.base_idx]) - - log.info("Location: %s", pformat(loc)) - if not mapped: - loc = {name: ds.axes[name].map_forward(v) for name,v in loc.items()} - log.info("Internal location: %s", pformat(loc)) - loc = models.normalizeLocation(loc, ds.internal_axis_supports) - log.info("Normalized location: %s", pformat(loc)) - - # Assume single-model for now. - model = models.VariationModel(ds.normalized_master_locs) - assert 0 == model.mapping[ds.base_idx] - - merger = InstancerMerger(font, model, loc) - - log.info("Building interpolated tables") - # TODO GSUB/GDEF - merger.mergeTables(font, master_fonts, ['GPOS']) - return font +def interpolate_layout(designspace, loc, master_finder=lambda s: s, mapped=False): + """ + Interpolate GPOS from a designspace file and location. + If master_finder is set, it should be a callable that takes master + filename as found in designspace file and map it to master font + binary as to be opened (eg. .ttf or .otf). -def main(args=None): - """Interpolate GDEF/GPOS/GSUB tables for a point on a designspace""" - from fontTools import configLogger - import argparse - import sys + If mapped is False (default), then location is mapped using the + map element of the axes in designspace file. If mapped is True, + it is assumed that location is in designspace's internal space and + no mapping is performed. + """ + if hasattr(designspace, "sources"): # Assume a DesignspaceDocument + pass + else: # Assume a file path + from fontTools.designspaceLib import DesignSpaceDocument + + designspace = DesignSpaceDocument.fromfile(designspace) - parser = argparse.ArgumentParser( - "fonttools varLib.interpolate_layout", - description=main.__doc__, - ) - parser.add_argument('designspace_filename', metavar='DESIGNSPACE', - help="Input TTF files") - parser.add_argument('locations', metavar='LOCATION', type=str, nargs='+', - help="Axis locations (e.g. wdth=120") - parser.add_argument('-o', '--output', metavar='OUTPUT', - help="Output font file (defaults to <designspacename>-instance.ttf)") - parser.add_argument('-l', '--loglevel', metavar='LEVEL', default="INFO", - help="Logging level (defaults to INFO)") + ds = load_designspace(designspace) + log.info("Building interpolated font") + log.info("Loading master fonts") + master_fonts = load_masters(designspace, master_finder) + font = deepcopy(master_fonts[ds.base_idx]) - args = parser.parse_args(args) + log.info("Location: %s", pformat(loc)) + if not mapped: + loc = {name: ds.axes[name].map_forward(v) for name, v in loc.items()} + log.info("Internal location: %s", pformat(loc)) + loc = models.normalizeLocation(loc, ds.internal_axis_supports) + log.info("Normalized location: %s", pformat(loc)) - if not args.output: - args.output = os.path.splitext(args.designspace_filename)[0] + '-instance.ttf' + # Assume single-model for now. + model = models.VariationModel(ds.normalized_master_locs) + assert 0 == model.mapping[ds.base_idx] - configLogger(level=args.loglevel) + merger = InstancerMerger(font, model, loc) - finder = lambda s: s.replace('master_ufo', 'master_ttf_interpolatable').replace('.ufo', '.ttf') + log.info("Building interpolated tables") + # TODO GSUB/GDEF + merger.mergeTables(font, master_fonts, ["GPOS"]) + return font - loc = {} - for arg in args.locations: - tag,val = arg.split('=') - loc[tag] = float(val) - font = interpolate_layout(args.designspace_filename, loc, finder) - log.info("Saving font %s", args.output) - font.save(args.output) +def main(args=None): + """Interpolate GDEF/GPOS/GSUB tables for a point on a designspace""" + from fontTools import configLogger + import argparse + import sys + + parser = argparse.ArgumentParser( + "fonttools varLib.interpolate_layout", + description=main.__doc__, + ) + parser.add_argument( + "designspace_filename", metavar="DESIGNSPACE", help="Input TTF files" + ) + parser.add_argument( + "locations", + metavar="LOCATION", + type=str, + nargs="+", + help="Axis locations (e.g. wdth=120", + ) + parser.add_argument( + "-o", + "--output", + metavar="OUTPUT", + help="Output font file (defaults to <designspacename>-instance.ttf)", + ) + parser.add_argument( + "-l", + "--loglevel", + metavar="LEVEL", + default="INFO", + help="Logging level (defaults to INFO)", + ) + + args = parser.parse_args(args) + + if not args.output: + args.output = os.path.splitext(args.designspace_filename)[0] + "-instance.ttf" + + configLogger(level=args.loglevel) + + finder = lambda s: s.replace("master_ufo", "master_ttf_interpolatable").replace( + ".ufo", ".ttf" + ) + + loc = {} + for arg in args.locations: + tag, val = arg.split("=") + loc[tag] = float(val) + + font = interpolate_layout(args.designspace_filename, loc, finder) + log.info("Saving font %s", args.output) + font.save(args.output) if __name__ == "__main__": - import sys - if len(sys.argv) > 1: - sys.exit(main()) - import doctest - sys.exit(doctest.testmod().failed) + import sys + + if len(sys.argv) > 1: + sys.exit(main()) + import doctest + + sys.exit(doctest.testmod().failed) |