public static LigCaretList CreateFrom(BinaryReader reader, long beginAt)
{
reader.BaseStream.Seek(beginAt, SeekOrigin.Begin);
//----
LigCaretList ligcaretList = new LigCaretList();
ushort coverageOffset = reader.ReadUInt16();
ushort ligGlyphCount = reader.ReadUInt16();
ushort[] ligGlyphOffsets = Utils.ReadUInt16Array(reader, ligGlyphCount);
LigGlyph[] ligGlyphs = new LigGlyph[ligGlyphCount];
for (int i = 0; i < ligGlyphCount; ++i)
{
ligGlyphs[i] = LigGlyph.CreateFrom(reader, beginAt + ligGlyphOffsets[i]);
}
ligcaretList._ligGlyphs = ligGlyphs;
ligcaretList._coverageTable = CoverageTable.CreateFrom(reader, beginAt + coverageOffset);
return(ligcaretList);
}
protected override void ReadContentFrom(BinaryReader reader)
{
_tableStartAt = reader.BaseStream.Position;
//-----------------------------------------
//GDEF Header, Version 1.0
//Type Name Description
//uint16 MajorVersion Major version of the GDEF table, = 1
//uint16 MinorVersion Minor version of the GDEF table, = 0
//Offset16 GlyphClassDef Offset to class definition table for glyph type, from beginning of GDEF header (may be NULL)
//Offset16 AttachList Offset to list of glyphs with attachment points, from beginning of GDEF header (may be NULL)
//Offset16 LigCaretList Offset to list of positioning points for ligature carets, from beginning of GDEF header (may be NULL)
//Offset16 MarkAttachClassDef Offset to class definition table for mark attachment type, from beginning of GDEF header (may be NULL)
//
//GDEF Header, Version 1.2
//Type Name Description
//uint16 MajorVersion Major version of the GDEF table, = 1
//uint16 MinorVersion Minor version of the GDEF table, = 2
//Offset16 GlyphClassDef Offset to class definition table for glyph type, from beginning of GDEF header (may be NULL)
//Offset16 AttachList Offset to list of glyphs with attachment points, from beginning of GDEF header (may be NULL)
//Offset16 LigCaretList Offset to list of positioning points for ligature carets, from beginning of GDEF header (may be NULL)
//Offset16 MarkAttachClassDef Offset to class definition table for mark attachment type, from beginning of GDEF header (may be NULL)
//Offset16 MarkGlyphSetsDef Offset to the table of mark set definitions, from beginning of GDEF header (may be NULL)
//
//GDEF Header, Version 1.3
//Type Name Description
//uint16 MajorVersion Major version of the GDEF table, = 1
//uint16 MinorVersion Minor version of the GDEF table, = 3
//Offset16 GlyphClassDef Offset to class definition table for glyph type, from beginning of GDEF header (may be NULL)
//Offset16 AttachList Offset to list of glyphs with attachment points, from beginning of GDEF header (may be NULL)
//Offset16 LigCaretList Offset to list of positioning points for ligature carets, from beginning of GDEF header (may be NULL)
//Offset16 MarkAttachClassDef Offset to class definition table for mark attachment type, from beginning of GDEF header (may be NULL)
//Offset16 MarkGlyphSetsDef Offset to the table of mark set definitions, from beginning of GDEF header (may be NULL)
//Offset32 ItemVarStore Offset to the Item Variation Store table, from beginning of GDEF header (may be NULL)
//common to 1.0, 1.2, 1.3...
this.MajorVersion = reader.ReadUInt16();
this.MinorVersion = reader.ReadUInt16();
//
ushort glyphClassDefOffset = reader.ReadUInt16();
ushort attachListOffset = reader.ReadUInt16();
ushort ligCaretListOffset = reader.ReadUInt16();
ushort markAttachClassDefOffset = reader.ReadUInt16();
ushort markGlyphSetsDefOffset = 0;
uint itemVarStoreOffset = 0;
//
switch (MinorVersion)
{
default:
Utils.WarnUnimplemented("GDEF Minor Version {0}", MinorVersion);
return;
case 0:
break;
case 2:
markGlyphSetsDefOffset = reader.ReadUInt16();
break;
case 3:
markGlyphSetsDefOffset = reader.ReadUInt16();
itemVarStoreOffset = reader.ReadUInt32();
break;
}
//---------------
this.GlyphClassDef = (glyphClassDefOffset == 0) ? null : ClassDefTable.CreateFrom(reader, _tableStartAt + glyphClassDefOffset);
this.AttachmentListTable = (attachListOffset == 0) ? null : AttachmentListTable.CreateFrom(reader, _tableStartAt + attachListOffset);
this.LigCaretList = (ligCaretListOffset == 0) ? null : LigCaretList.CreateFrom(reader, _tableStartAt + ligCaretListOffset);
//A Mark Attachment Class Definition Table defines the class to which a mark glyph may belong.
//This table uses the same format as the Class Definition table (for details, see the chapter, Common Table Formats ).
#if DEBUG
if (markAttachClassDefOffset == 2)
{
//temp debug invalid font
this.MarkAttachmentClassDef = (markAttachClassDefOffset == 0) ? null : ClassDefTable.CreateFrom(reader, reader.BaseStream.Position);
}
else
{
this.MarkAttachmentClassDef = (markAttachClassDefOffset == 0) ? null : ClassDefTable.CreateFrom(reader, _tableStartAt + markAttachClassDefOffset);
}
#else
this.MarkAttachmentClassDef = (markAttachClassDefOffset == 0) ? null : ClassDefTable.CreateFrom(reader, _tableStartAt + markAttachClassDefOffset);
#endif
this.MarkGlyphSetsTable = (markGlyphSetsDefOffset == 0) ? null : MarkGlyphSetsTable.CreateFrom(reader, _tableStartAt + markGlyphSetsDefOffset);
if (itemVarStoreOffset != 0)
{
//not supported
Utils.WarnUnimplemented("GDEF ItemVarStore");
reader.BaseStream.Seek(this.Header.Offset + itemVarStoreOffset, SeekOrigin.Begin);
}
}