65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
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# Since bitmap glyph metrics are shared between EBLC and EBDT
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# this class gets its own python file.
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from fontTools.misc import sstruct
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from fontTools.misc.textTools import safeEval
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import logging
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log = logging.getLogger(__name__)
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bigGlyphMetricsFormat = """
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> # big endian
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height: B
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width: B
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horiBearingX: b
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horiBearingY: b
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horiAdvance: B
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vertBearingX: b
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vertBearingY: b
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vertAdvance: B
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"""
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smallGlyphMetricsFormat = """
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> # big endian
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height: B
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width: B
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BearingX: b
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BearingY: b
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Advance: B
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"""
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class BitmapGlyphMetrics(object):
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def toXML(self, writer, ttFont):
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writer.begintag(self.__class__.__name__)
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writer.newline()
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for metricName in sstruct.getformat(self.__class__.binaryFormat)[1]:
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writer.simpletag(metricName, value=getattr(self, metricName))
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writer.newline()
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writer.endtag(self.__class__.__name__)
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writer.newline()
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def fromXML(self, name, attrs, content, ttFont):
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metricNames = set(sstruct.getformat(self.__class__.binaryFormat)[1])
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for element in content:
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if not isinstance(element, tuple):
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continue
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name, attrs, content = element
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# Make sure this is a metric that is needed by GlyphMetrics.
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if name in metricNames:
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vars(self)[name] = safeEval(attrs["value"])
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else:
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log.warning(
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"unknown name '%s' being ignored in %s.",
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name,
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self.__class__.__name__,
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)
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class BigGlyphMetrics(BitmapGlyphMetrics):
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binaryFormat = bigGlyphMetricsFormat
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class SmallGlyphMetrics(BitmapGlyphMetrics):
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binaryFormat = smallGlyphMetricsFormat
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