731e4377e1
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@127 4cde692c-a291-49d1-8350-778aa11640f8
96 lines
3.0 KiB
Python
96 lines
3.0 KiB
Python
import DefaultTable
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import Numeric
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from fontTools import ttLib
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from fontTools.misc.textTools import safeEval
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class table__h_m_t_x(DefaultTable.DefaultTable):
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headerTag = 'hhea'
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advanceName = 'width'
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sideBearingName = 'lsb'
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numberOfMetricsName = 'numberOfHMetrics'
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def decompile(self, data, ttFont):
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numberOfMetrics = int(getattr(ttFont[self.headerTag], self.numberOfMetricsName))
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metrics = Numeric.fromstring(data[:4 * numberOfMetrics],
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Numeric.Int16)
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if ttLib.endian <> "big":
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metrics = metrics.byteswapped()
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metrics.shape = (numberOfMetrics, 2)
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data = data[4 * numberOfMetrics:]
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numberOfSideBearings = ttFont['maxp'].numGlyphs - numberOfMetrics
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numberOfSideBearings = int(numberOfSideBearings)
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if numberOfSideBearings:
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assert numberOfSideBearings > 0, "bad hmtx/vmtx table"
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lastAdvance = metrics[-1][0]
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advances = Numeric.array([lastAdvance] * numberOfSideBearings,
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Numeric.Int16)
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sideBearings = Numeric.fromstring(data[:2 * numberOfSideBearings],
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Numeric.Int16)
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if ttLib.endian <> "big":
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sideBearings = sideBearings.byteswapped()
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data = data[2 * numberOfSideBearings:]
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additionalMetrics = Numeric.array([advances, sideBearings],
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Numeric.Int16)
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metrics = Numeric.concatenate((metrics,
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Numeric.transpose(additionalMetrics)))
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if data:
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import sys
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sys.stderr.write("too much data for hmtx/vmtx table\n")
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metrics = metrics.tolist()
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self.metrics = {}
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for i in range(len(metrics)):
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glyphName = ttFont.getGlyphName(i)
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self.metrics[glyphName] = metrics[i]
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def compile(self, ttFont):
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metrics = []
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for glyphName in ttFont.getGlyphOrder():
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metrics.append(self.metrics[glyphName])
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lastAdvance = metrics[-1][0]
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lastIndex = len(metrics)
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while metrics[lastIndex-2][0] == lastAdvance:
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lastIndex = lastIndex - 1
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additionalMetrics = metrics[lastIndex:]
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additionalMetrics = map(lambda (advance, sb): sb, additionalMetrics)
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metrics = metrics[:lastIndex]
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setattr(ttFont[self.headerTag], self.numberOfMetricsName, len(metrics))
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metrics = Numeric.array(metrics, Numeric.Int16)
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if ttLib.endian <> "big":
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metrics = metrics.byteswapped()
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data = metrics.tostring()
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additionalMetrics = Numeric.array(additionalMetrics, Numeric.Int16)
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if ttLib.endian <> "big":
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additionalMetrics = additionalMetrics.byteswapped()
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data = data + additionalMetrics.tostring()
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return data
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def toXML(self, writer, ttFont):
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names = self.metrics.keys()
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names.sort()
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for glyphName in names:
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advance, sb = self.metrics[glyphName]
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writer.simpletag("mtx", [
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("name", glyphName),
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(self.advanceName, advance),
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(self.sideBearingName, sb),
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])
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writer.newline()
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def fromXML(self, (name, attrs, content), ttFont):
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if not hasattr(self, "metrics"):
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self.metrics = {}
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if name == "mtx":
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self.metrics[attrs["name"]] = [safeEval(attrs[self.advanceName]),
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safeEval(attrs[self.sideBearingName])]
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def __getitem__(self, glyphName):
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return self.metrics[glyphName]
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def __setitem__(self, glyphName, (advance, sb)):
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self.metrics[glyphName] = advance, sb
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