| # Since bitmap glyph metrics are shared between EBLC and EBDT |
| # this class gets its own python file. |
| from fontTools.misc import sstruct |
| from types import TupleType |
| from fontTools.misc.textTools import safeEval |
| |
| |
| bigGlyphMetricsFormat = """ |
| > # big endian |
| height: B |
| width: B |
| horiBearingX: b |
| horiBearingY: b |
| horiAdvance: B |
| vertBearingX: b |
| vertBearingY: b |
| vertAdvance: B |
| """ |
| |
| smallGlyphMetricsFormat = """ |
| > # big endian |
| height: B |
| width: B |
| BearingX: b |
| BearingY: b |
| Advance: B |
| """ |
| |
| class BitmapGlyphMetrics: |
| |
| def toXML(self, writer, ttFont): |
| writer.begintag(self.__class__.__name__) |
| writer.newline() |
| for metricName in sstruct.getformat(self.__class__.binaryFormat)[1]: |
| writer.simpletag(metricName, value=getattr(self, metricName)) |
| writer.newline() |
| writer.endtag(self.__class__.__name__) |
| writer.newline() |
| |
| def fromXML(self, (name, attrs, content), ttFont): |
| metricNames = set(sstruct.getformat(self.__class__.binaryFormat)[1]) |
| for element in content: |
| if type(element) != TupleType: |
| continue |
| name, attrs, content = element |
| # Make sure this is a metric that is needed by GlyphMetrics. |
| if name in metricNames: |
| vars(self)[name] = safeEval(attrs['value']) |
| else: |
| print "Warning: unknown name '%s' being ignored in %s." % name, self.__class__.__name__ |
| |
| |
| class BigGlyphMetrics(BitmapGlyphMetrics): |
| binaryFormat = bigGlyphMetricsFormat |
| |
| class SmallGlyphMetrics(BitmapGlyphMetrics): |
| binaryFormat = smallGlyphMetricsFormat |