5fc65d7168
* Replaced all from ...py23 import * with explicit name imports, or removed completely when possible. * Replaced tounicode() with tostr() * Changed all BytesIO ans StringIO imports to from io import ..., replaced all UnicodeIO with StringIO. * Replaced all unichr() with chr() * Misc minor tweaks and fixes
55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
""" TSI{0,1,2,3,5} are private tables used by Microsoft Visual TrueType (VTT)
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tool to store its hinting source data.
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TSI0 is the index table containing the lengths and offsets for the glyph
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programs and 'extra' programs ('fpgm', 'prep', and 'cvt') that are contained
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in the TSI1 table.
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"""
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from . import DefaultTable
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import struct
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tsi0Format = '>HHL'
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def fixlongs(glyphID, textLength, textOffset):
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return int(glyphID), int(textLength), textOffset
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class table_T_S_I__0(DefaultTable.DefaultTable):
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dependencies = ["TSI1"]
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def decompile(self, data, ttFont):
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numGlyphs = ttFont['maxp'].numGlyphs
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indices = []
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size = struct.calcsize(tsi0Format)
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for i in range(numGlyphs + 5):
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glyphID, textLength, textOffset = fixlongs(*struct.unpack(tsi0Format, data[:size]))
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indices.append((glyphID, textLength, textOffset))
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data = data[size:]
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assert len(data) == 0
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assert indices[-5] == (0XFFFE, 0, 0xABFC1F34), "bad magic number"
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self.indices = indices[:-5]
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self.extra_indices = indices[-4:]
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def compile(self, ttFont):
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if not hasattr(self, "indices"):
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# We have no corresponding table (TSI1 or TSI3); let's return
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# no data, which effectively means "ignore us".
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return b""
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data = b""
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for index, textLength, textOffset in self.indices:
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data = data + struct.pack(tsi0Format, index, textLength, textOffset)
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data = data + struct.pack(tsi0Format, 0XFFFE, 0, 0xABFC1F34)
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for index, textLength, textOffset in self.extra_indices:
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data = data + struct.pack(tsi0Format, index, textLength, textOffset)
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return data
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def set(self, indices, extra_indices):
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# gets called by 'TSI1' or 'TSI3'
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self.indices = indices
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self.extra_indices = extra_indices
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def toXML(self, writer, ttFont):
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writer.comment("This table will be calculated by the compiler")
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writer.newline()
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