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# Copyright 2015 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Test general health of the fonts."""
import json
from nototools import render
def _run_harfbuzz(text, font, language, extra_parameters=None):
"""Run harfbuzz on some text and return the shaped list."""
try:
# if extra_parameters is a string, split it into a list
extra_parameters = extra_parameters.split(' ')
except AttributeError:
pass
hb_output = render.run_harfbuzz_on_text(
text, font, language, extra_parameters)
return json.loads(hb_output)
_advance_cache = {}
def get_advances(text, font, extra_parameters=None):
"""Get a list of horizontal advances for text rendered in a font."""
try:
return _advance_cache[(text, font, extra_parameters)]
except KeyError:
pass
hb_output = _run_harfbuzz(text, font, None, extra_parameters)
advances = [glyph['ax'] for glyph in hb_output]
_advance_cache[(text, font, extra_parameters)] = advances
return advances
_shape_cache = {}
def get_glyphs(text, font, extra_parameters=None):
"""Get a list of shaped glyphs for text rendered in a font."""
try:
return _shape_cache[(text, font, extra_parameters)]
except KeyError:
pass
hb_output = _run_harfbuzz(text, font, None, extra_parameters)
shapes = [glyph['g'] for glyph in hb_output]
_shape_cache[(text, font, extra_parameters)] = shapes
return shapes
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