diff options
Diffstat (limited to 'Lib/fontTools/ttLib/tables/sbixGlyph.py')
| -rw-r--r-- | Lib/fontTools/ttLib/tables/sbixGlyph.py | 218 |
1 files changed, 123 insertions, 95 deletions
diff --git a/Lib/fontTools/ttLib/tables/sbixGlyph.py b/Lib/fontTools/ttLib/tables/sbixGlyph.py index fe29c090..fd687a18 100644 --- a/Lib/fontTools/ttLib/tables/sbixGlyph.py +++ b/Lib/fontTools/ttLib/tables/sbixGlyph.py @@ -20,98 +20,126 @@ sbixGlyphHeaderFormatSize = sstruct.calcsize(sbixGlyphHeaderFormat) class Glyph(object): - def __init__(self, glyphName=None, referenceGlyphName=None, originOffsetX=0, originOffsetY=0, graphicType=None, imageData=None, rawdata=None, gid=0): - self.gid = gid - self.glyphName = glyphName - self.referenceGlyphName = referenceGlyphName - self.originOffsetX = originOffsetX - self.originOffsetY = originOffsetY - self.rawdata = rawdata - self.graphicType = graphicType - self.imageData = imageData - - # fix self.graphicType if it is null terminated or too short - if self.graphicType is not None: - if self.graphicType[-1] == "\0": - self.graphicType = self.graphicType[:-1] - if len(self.graphicType) > 4: - from fontTools import ttLib - raise ttLib.TTLibError("Glyph.graphicType must not be longer than 4 characters.") - elif len(self.graphicType) < 4: - # pad with spaces - self.graphicType += " "[:(4 - len(self.graphicType))] - - def decompile(self, ttFont): - self.glyphName = ttFont.getGlyphName(self.gid) - if self.rawdata is None: - from fontTools import ttLib - raise ttLib.TTLibError("No table data to decompile") - if len(self.rawdata) > 0: - if len(self.rawdata) < sbixGlyphHeaderFormatSize: - from fontTools import ttLib - #print "Glyph %i header too short: Expected %x, got %x." % (self.gid, sbixGlyphHeaderFormatSize, len(self.rawdata)) - raise ttLib.TTLibError("Glyph header too short.") - - sstruct.unpack(sbixGlyphHeaderFormat, self.rawdata[:sbixGlyphHeaderFormatSize], self) - - if self.graphicType == "dupe": - # this glyph is a reference to another glyph's image data - gid, = struct.unpack(">H", self.rawdata[sbixGlyphHeaderFormatSize:]) - self.referenceGlyphName = ttFont.getGlyphName(gid) - else: - self.imageData = self.rawdata[sbixGlyphHeaderFormatSize:] - self.referenceGlyphName = None - # clean up - del self.rawdata - del self.gid - - def compile(self, ttFont): - if self.glyphName is None: - from fontTools import ttLib - raise ttLib.TTLibError("Can't compile Glyph without glyph name") - # TODO: if ttFont has no maxp, cmap etc., ignore glyph names and compile by index? - # (needed if you just want to compile the sbix table on its own) - self.gid = struct.pack(">H", ttFont.getGlyphID(self.glyphName)) - if self.graphicType is None: - self.rawdata = b"" - else: - self.rawdata = sstruct.pack(sbixGlyphHeaderFormat, self) + self.imageData - - def toXML(self, xmlWriter, ttFont): - if self.graphicType == None: - # TODO: ignore empty glyphs? - # a glyph data entry is required for each glyph, - # but empty ones can be calculated at compile time - xmlWriter.simpletag("glyph", name=self.glyphName) - xmlWriter.newline() - return - xmlWriter.begintag("glyph", - graphicType=self.graphicType, - name=self.glyphName, - originOffsetX=self.originOffsetX, - originOffsetY=self.originOffsetY, - ) - xmlWriter.newline() - if self.graphicType == "dupe": - # graphicType == "dupe" is a reference to another glyph id. - xmlWriter.simpletag("ref", glyphname=self.referenceGlyphName) - else: - xmlWriter.begintag("hexdata") - xmlWriter.newline() - xmlWriter.dumphex(self.imageData) - xmlWriter.endtag("hexdata") - xmlWriter.newline() - xmlWriter.endtag("glyph") - xmlWriter.newline() - - def fromXML(self, name, attrs, content, ttFont): - if name == "ref": - # glyph is a "dupe", i.e. a reference to another glyph's image data. - # in this case imageData contains the glyph id of the reference glyph - # get glyph id from glyphname - self.imageData = struct.pack(">H", ttFont.getGlyphID(safeEval("'''" + attrs["glyphname"] + "'''"))) - elif name == "hexdata": - self.imageData = readHex(content) - else: - from fontTools import ttLib - raise ttLib.TTLibError("can't handle '%s' element" % name) + def __init__( + self, + glyphName=None, + referenceGlyphName=None, + originOffsetX=0, + originOffsetY=0, + graphicType=None, + imageData=None, + rawdata=None, + gid=0, + ): + self.gid = gid + self.glyphName = glyphName + self.referenceGlyphName = referenceGlyphName + self.originOffsetX = originOffsetX + self.originOffsetY = originOffsetY + self.rawdata = rawdata + self.graphicType = graphicType + self.imageData = imageData + + # fix self.graphicType if it is null terminated or too short + if self.graphicType is not None: + if self.graphicType[-1] == "\0": + self.graphicType = self.graphicType[:-1] + if len(self.graphicType) > 4: + from fontTools import ttLib + + raise ttLib.TTLibError( + "Glyph.graphicType must not be longer than 4 characters." + ) + elif len(self.graphicType) < 4: + # pad with spaces + self.graphicType += " "[: (4 - len(self.graphicType))] + + def decompile(self, ttFont): + self.glyphName = ttFont.getGlyphName(self.gid) + if self.rawdata is None: + from fontTools import ttLib + + raise ttLib.TTLibError("No table data to decompile") + if len(self.rawdata) > 0: + if len(self.rawdata) < sbixGlyphHeaderFormatSize: + from fontTools import ttLib + + # print "Glyph %i header too short: Expected %x, got %x." % (self.gid, sbixGlyphHeaderFormatSize, len(self.rawdata)) + raise ttLib.TTLibError("Glyph header too short.") + + sstruct.unpack( + sbixGlyphHeaderFormat, self.rawdata[:sbixGlyphHeaderFormatSize], self + ) + + if self.graphicType == "dupe": + # this glyph is a reference to another glyph's image data + (gid,) = struct.unpack(">H", self.rawdata[sbixGlyphHeaderFormatSize:]) + self.referenceGlyphName = ttFont.getGlyphName(gid) + else: + self.imageData = self.rawdata[sbixGlyphHeaderFormatSize:] + self.referenceGlyphName = None + # clean up + del self.rawdata + del self.gid + + def compile(self, ttFont): + if self.glyphName is None: + from fontTools import ttLib + + raise ttLib.TTLibError("Can't compile Glyph without glyph name") + # TODO: if ttFont has no maxp, cmap etc., ignore glyph names and compile by index? + # (needed if you just want to compile the sbix table on its own) + self.gid = struct.pack(">H", ttFont.getGlyphID(self.glyphName)) + if self.graphicType is None: + rawdata = b"" + else: + rawdata = sstruct.pack(sbixGlyphHeaderFormat, self) + if self.graphicType == "dupe": + rawdata += struct.pack(">H", ttFont.getGlyphID(self.referenceGlyphName)) + else: + assert self.imageData is not None + rawdata += self.imageData + self.rawdata = rawdata + + def toXML(self, xmlWriter, ttFont): + if self.graphicType is None: + # TODO: ignore empty glyphs? + # a glyph data entry is required for each glyph, + # but empty ones can be calculated at compile time + xmlWriter.simpletag("glyph", name=self.glyphName) + xmlWriter.newline() + return + xmlWriter.begintag( + "glyph", + graphicType=self.graphicType, + name=self.glyphName, + originOffsetX=self.originOffsetX, + originOffsetY=self.originOffsetY, + ) + xmlWriter.newline() + if self.graphicType == "dupe": + # graphicType == "dupe" is a reference to another glyph id. + xmlWriter.simpletag("ref", glyphname=self.referenceGlyphName) + else: + xmlWriter.begintag("hexdata") + xmlWriter.newline() + xmlWriter.dumphex(self.imageData) + xmlWriter.endtag("hexdata") + xmlWriter.newline() + xmlWriter.endtag("glyph") + xmlWriter.newline() + + def fromXML(self, name, attrs, content, ttFont): + if name == "ref": + # glyph is a "dupe", i.e. a reference to another glyph's image data. + # in this case imageData contains the glyph id of the reference glyph + # get glyph id from glyphname + glyphname = safeEval("'''" + attrs["glyphname"] + "'''") + self.imageData = struct.pack(">H", ttFont.getGlyphID(glyphname)) + self.referenceGlyphName = glyphname + elif name == "hexdata": + self.imageData = readHex(content) + else: + from fontTools import ttLib + + raise ttLib.TTLibError("can't handle '%s' element" % name) |