diff options
Diffstat (limited to 'Lib/fontTools/ttLib/tables/S_V_G_.py')
| -rw-r--r-- | Lib/fontTools/ttLib/tables/S_V_G_.py | 290 |
1 files changed, 154 insertions, 136 deletions
diff --git a/Lib/fontTools/ttLib/tables/S_V_G_.py b/Lib/fontTools/ttLib/tables/S_V_G_.py index 49e98d03..ebc2befd 100644 --- a/Lib/fontTools/ttLib/tables/S_V_G_.py +++ b/Lib/fontTools/ttLib/tables/S_V_G_.py @@ -50,148 +50,166 @@ doc_index_entry_format_0 = """ doc_index_entry_format_0Size = sstruct.calcsize(doc_index_entry_format_0) - class table_S_V_G_(DefaultTable.DefaultTable): - - def decompile(self, data, ttFont): - self.docList = [] - # Version 0 is the standardized version of the table; and current. - # https://www.microsoft.com/typography/otspec/svg.htm - sstruct.unpack(SVG_format_0, data[:SVG_format_0Size], self) - if self.version != 0: - log.warning( - "Unknown SVG table version '%s'. Decompiling as version 0.", self.version) - # read in SVG Documents Index - # data starts with the first entry of the entry list. - pos = subTableStart = self.offsetToSVGDocIndex - self.numEntries = struct.unpack(">H", data[pos:pos+2])[0] - pos += 2 - if self.numEntries > 0: - data2 = data[pos:] - entries = [] - for i in range(self.numEntries): - docIndexEntry, data2 = sstruct.unpack2(doc_index_entry_format_0, data2, DocumentIndexEntry()) - entries.append(docIndexEntry) - - for entry in entries: - start = entry.svgDocOffset + subTableStart - end = start + entry.svgDocLength - doc = data[start:end] - compressed = False - if doc.startswith(b"\x1f\x8b"): - import gzip - bytesIO = BytesIO(doc) - with gzip.GzipFile(None, "r", fileobj=bytesIO) as gunzipper: - doc = gunzipper.read() - del bytesIO - compressed = True - doc = tostr(doc, "utf_8") - self.docList.append( - SVGDocument(doc, entry.startGlyphID, entry.endGlyphID, compressed) - ) - - def compile(self, ttFont): - version = 0 - offsetToSVGDocIndex = SVG_format_0Size # I start the SVGDocIndex right after the header. - # get SGVDoc info. - docList = [] - entryList = [] - numEntries = len(self.docList) - datum = struct.pack(">H",numEntries) - entryList.append(datum) - curOffset = len(datum) + doc_index_entry_format_0Size*numEntries - seenDocs = {} - allCompressed = getattr(self, "compressed", False) - for i, doc in enumerate(self.docList): - if isinstance(doc, (list, tuple)): - doc = SVGDocument(*doc) - self.docList[i] = doc - docBytes = tobytes(doc.data, encoding="utf_8") - if (allCompressed or doc.compressed) and not docBytes.startswith(b"\x1f\x8b"): - import gzip - bytesIO = BytesIO() - # mtime=0 strips the useless timestamp and makes gzip output reproducible; - # equivalent to `gzip -n` - with gzip.GzipFile(None, "w", fileobj=bytesIO, mtime=0) as gzipper: - gzipper.write(docBytes) - gzipped = bytesIO.getvalue() - if len(gzipped) < len(docBytes): - docBytes = gzipped - del gzipped, bytesIO - docLength = len(docBytes) - if docBytes in seenDocs: - docOffset = seenDocs[docBytes] - else: - docOffset = curOffset - curOffset += docLength - seenDocs[docBytes] = docOffset - docList.append(docBytes) - entry = struct.pack(">HHLL", doc.startGlyphID, doc.endGlyphID, docOffset, docLength) - entryList.append(entry) - entryList.extend(docList) - svgDocData = bytesjoin(entryList) - - reserved = 0 - header = struct.pack(">HLL", version, offsetToSVGDocIndex, reserved) - data = [header, svgDocData] - data = bytesjoin(data) - return data - - def toXML(self, writer, ttFont): - for i, doc in enumerate(self.docList): - if isinstance(doc, (list, tuple)): - doc = SVGDocument(*doc) - self.docList[i] = doc - attrs = {"startGlyphID": doc.startGlyphID, "endGlyphID": doc.endGlyphID} - if doc.compressed: - attrs["compressed"] = 1 - writer.begintag("svgDoc", **attrs) - writer.newline() - writer.writecdata(doc.data) - writer.newline() - writer.endtag("svgDoc") - writer.newline() - - def fromXML(self, name, attrs, content, ttFont): - if name == "svgDoc": - if not hasattr(self, "docList"): - self.docList = [] - doc = strjoin(content) - doc = doc.strip() - startGID = int(attrs["startGlyphID"]) - endGID = int(attrs["endGlyphID"]) - compressed = bool(safeEval(attrs.get("compressed", "0"))) - self.docList.append(SVGDocument(doc, startGID, endGID, compressed)) - else: - log.warning("Unknown %s %s", name, content) + def decompile(self, data, ttFont): + self.docList = [] + # Version 0 is the standardized version of the table; and current. + # https://www.microsoft.com/typography/otspec/svg.htm + sstruct.unpack(SVG_format_0, data[:SVG_format_0Size], self) + if self.version != 0: + log.warning( + "Unknown SVG table version '%s'. Decompiling as version 0.", + self.version, + ) + # read in SVG Documents Index + # data starts with the first entry of the entry list. + pos = subTableStart = self.offsetToSVGDocIndex + self.numEntries = struct.unpack(">H", data[pos : pos + 2])[0] + pos += 2 + if self.numEntries > 0: + data2 = data[pos:] + entries = [] + for i in range(self.numEntries): + record_data = data2[ + i + * doc_index_entry_format_0Size : (i + 1) + * doc_index_entry_format_0Size + ] + docIndexEntry = sstruct.unpack( + doc_index_entry_format_0, record_data, DocumentIndexEntry() + ) + entries.append(docIndexEntry) + + for entry in entries: + start = entry.svgDocOffset + subTableStart + end = start + entry.svgDocLength + doc = data[start:end] + compressed = False + if doc.startswith(b"\x1f\x8b"): + import gzip + + bytesIO = BytesIO(doc) + with gzip.GzipFile(None, "r", fileobj=bytesIO) as gunzipper: + doc = gunzipper.read() + del bytesIO + compressed = True + doc = tostr(doc, "utf_8") + self.docList.append( + SVGDocument(doc, entry.startGlyphID, entry.endGlyphID, compressed) + ) + + def compile(self, ttFont): + version = 0 + offsetToSVGDocIndex = ( + SVG_format_0Size # I start the SVGDocIndex right after the header. + ) + # get SGVDoc info. + docList = [] + entryList = [] + numEntries = len(self.docList) + datum = struct.pack(">H", numEntries) + entryList.append(datum) + curOffset = len(datum) + doc_index_entry_format_0Size * numEntries + seenDocs = {} + allCompressed = getattr(self, "compressed", False) + for i, doc in enumerate(self.docList): + if isinstance(doc, (list, tuple)): + doc = SVGDocument(*doc) + self.docList[i] = doc + docBytes = tobytes(doc.data, encoding="utf_8") + if (allCompressed or doc.compressed) and not docBytes.startswith( + b"\x1f\x8b" + ): + import gzip + + bytesIO = BytesIO() + # mtime=0 strips the useless timestamp and makes gzip output reproducible; + # equivalent to `gzip -n` + with gzip.GzipFile(None, "w", fileobj=bytesIO, mtime=0) as gzipper: + gzipper.write(docBytes) + gzipped = bytesIO.getvalue() + if len(gzipped) < len(docBytes): + docBytes = gzipped + del gzipped, bytesIO + docLength = len(docBytes) + if docBytes in seenDocs: + docOffset = seenDocs[docBytes] + else: + docOffset = curOffset + curOffset += docLength + seenDocs[docBytes] = docOffset + docList.append(docBytes) + entry = struct.pack( + ">HHLL", doc.startGlyphID, doc.endGlyphID, docOffset, docLength + ) + entryList.append(entry) + entryList.extend(docList) + svgDocData = bytesjoin(entryList) + + reserved = 0 + header = struct.pack(">HLL", version, offsetToSVGDocIndex, reserved) + data = [header, svgDocData] + data = bytesjoin(data) + return data + + def toXML(self, writer, ttFont): + for i, doc in enumerate(self.docList): + if isinstance(doc, (list, tuple)): + doc = SVGDocument(*doc) + self.docList[i] = doc + attrs = {"startGlyphID": doc.startGlyphID, "endGlyphID": doc.endGlyphID} + if doc.compressed: + attrs["compressed"] = 1 + writer.begintag("svgDoc", **attrs) + writer.newline() + writer.writecdata(doc.data) + writer.newline() + writer.endtag("svgDoc") + writer.newline() + + def fromXML(self, name, attrs, content, ttFont): + if name == "svgDoc": + if not hasattr(self, "docList"): + self.docList = [] + doc = strjoin(content) + doc = doc.strip() + startGID = int(attrs["startGlyphID"]) + endGID = int(attrs["endGlyphID"]) + compressed = bool(safeEval(attrs.get("compressed", "0"))) + self.docList.append(SVGDocument(doc, startGID, endGID, compressed)) + else: + log.warning("Unknown %s %s", name, content) class DocumentIndexEntry(object): - def __init__(self): - self.startGlyphID = None # USHORT - self.endGlyphID = None # USHORT - self.svgDocOffset = None # ULONG - self.svgDocLength = None # ULONG + def __init__(self): + self.startGlyphID = None # USHORT + self.endGlyphID = None # USHORT + self.svgDocOffset = None # ULONG + self.svgDocLength = None # ULONG - def __repr__(self): - return "startGlyphID: %s, endGlyphID: %s, svgDocOffset: %s, svgDocLength: %s" % (self.startGlyphID, self.endGlyphID, self.svgDocOffset, self.svgDocLength) + def __repr__(self): + return ( + "startGlyphID: %s, endGlyphID: %s, svgDocOffset: %s, svgDocLength: %s" + % (self.startGlyphID, self.endGlyphID, self.svgDocOffset, self.svgDocLength) + ) @dataclass class SVGDocument(Sequence): - data: str - startGlyphID: int - endGlyphID: int - compressed: bool = False - - # Previously, the SVG table's docList attribute contained a lists of 3 items: - # [doc, startGlyphID, endGlyphID]; later, we added a `compressed` attribute. - # For backward compatibility with code that depends of them being sequences of - # fixed length=3, we subclass the Sequence abstract base class and pretend only - # the first three items are present. 'compressed' is only accessible via named - # attribute lookup like regular dataclasses: i.e. `doc.compressed`, not `doc[3]` - def __getitem__(self, index): - return astuple(self)[:3][index] - - def __len__(self): - return 3 + data: str + startGlyphID: int + endGlyphID: int + compressed: bool = False + + # Previously, the SVG table's docList attribute contained a lists of 3 items: + # [doc, startGlyphID, endGlyphID]; later, we added a `compressed` attribute. + # For backward compatibility with code that depends of them being sequences of + # fixed length=3, we subclass the Sequence abstract base class and pretend only + # the first three items are present. 'compressed' is only accessible via named + # attribute lookup like regular dataclasses: i.e. `doc.compressed`, not `doc[3]` + def __getitem__(self, index): + return astuple(self)[:3][index] + + def __len__(self): + return 3 |