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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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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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