public static ClassDefTable CreateFrom(BinaryReader reader, long beginAt)
{
reader.BaseStream.Seek(beginAt, SeekOrigin.Begin);
//---------
ClassDefTable classDefTable = new ClassDefTable();
switch (classDefTable.Format = reader.ReadUInt16())
{
default: throw new NotSupportedException();
case 1:
{
classDefTable.startGlyph = reader.ReadUInt16();
ushort glyphCount = reader.ReadUInt16();
classDefTable.classValueArray = Utils.ReadUInt16Array(reader, glyphCount);
} break;
case 2:
{
ushort classRangeCount = reader.ReadUInt16();
ClassRangeRecord[] records = new ClassRangeRecord[classRangeCount];
for (int i = 0; i < classRangeCount; ++i)
{
records[i] = new ClassRangeRecord(
reader.ReadUInt16(), //start glyph id
reader.ReadUInt16(), //end glyph id
reader.ReadUInt16()); //classNo
}
classDefTable.records = records;
} break;
}
return(classDefTable);
}
public ClassRangeRecord GetClassRangeRecord(uint i)
{
ClassRangeRecord crr = null;
if (i < ClassRangeCount)
{
crr = new ClassRangeRecord();
uint crrOffset = m_offsetClassDefFormat2 + (uint)FieldOffsets.ClassRangeRecordArray + i * 6;
crr.Start = m_bufTable.GetUshort(crrOffset);
crr.End = m_bufTable.GetUshort(crrOffset + 2);
crr.Class = m_bufTable.GetUshort(crrOffset + 4);
}
return(crr);
}
public bool Validate(Validator v, string sIdentity, OTTable table)
{
bool bRet = true;
// check that ClassRangeRecord array doesn't extend past end of table
if (m_offsetClassDefFormat2 + (uint)FieldOffsets.ClassRangeRecordArray + ClassRangeCount * 6 > m_bufTable.GetLength())
{
v.Error(T.T_NULL, E._OTL_ClassDefinitionTable_E_RangeRecordArrayPastEOT, table.m_tag, sIdentity);
bRet = false;
}
// check that ClassRangeRecord array is in sorted order
if (ClassRangeCount > 1)
{
for (uint i = 0; i < ClassRangeCount - 1; i++)
{
ClassRangeRecord ThisCrr = GetClassRangeRecord(i);
ClassRangeRecord NextCrr = GetClassRangeRecord(i + 1);
if (ThisCrr.Start >= NextCrr.Start)
{
v.Error(T.T_NULL, E._OTL_ClassDefinitionTable_E_RangeRecordArray_order, table.m_tag, sIdentity);
bRet = false;
// temporary debug code
/*
* v.DebugMsg("ClassRangeCount = " + ClassRangeCount, tag);
* for (uint j=0; j<ClassRangeCount; j++)
* {
* ClassRangeRecord crr = GetClassRangeRecord(j);
* v.DebugMsg("ClassRangeRecord[" + j + "].Start = " + crr.Start, tag);
* }
*/
break;
}
}
}
return(bRet);
}
public int GetClassValue(ushort glyphIndex)
{
switch (Format)
{
default: throw new NotSupportedException();
case 1:
{
if (glyphIndex >= startGlyph &&
glyphIndex < classValueArray.Length)
{
return(classValueArray[glyphIndex - startGlyph]);
}
return(-1);
}
case 2:
{
for (int i = 0; i < records.Length; ++i)
{
//TODO: review a proper method here again
//esp. binary search
ClassRangeRecord rec = records[i];
if (rec.startGlyphId <= glyphIndex)
{
if (glyphIndex <= rec.endGlyphId)
{
return(rec.classNo);
}
}
else
{
return(-1); //no need to go further
}
}
return(-1);
}
}
}
public ClassRangeRecord GetClassRangeRecord(uint i)
{
ClassRangeRecord crr = null;
if (i < ClassRangeCount)
{
crr = new ClassRangeRecord();
uint crrOffset = m_offsetClassDefFormat2 + (uint)FieldOffsets.ClassRangeRecordArray + i*6;
crr.Start = m_bufTable.GetUshort(crrOffset);
crr.End = m_bufTable.GetUshort(crrOffset + 2);
crr.Class = m_bufTable.GetUshort(crrOffset + 4);
}
return crr;
}
public static ClassDefTable CreateFrom(BinaryReader reader, long beginAt)
{
reader.BaseStream.Seek(beginAt, SeekOrigin.Begin);
//---------
ClassDefTable classDefTable = new ClassDefTable();
switch (classDefTable.Format = reader.ReadUInt16())
{
default: throw new NotSupportedException();
case 1:
{
classDefTable.startGlyph = reader.ReadUInt16();
ushort glyphCount = reader.ReadUInt16();
classDefTable.classValueArray = Utils.ReadUInt16Array(reader, glyphCount);
} break;
case 2:
{
ushort classRangeCount = reader.ReadUInt16();
ClassRangeRecord[] records = new ClassRangeRecord[classRangeCount];
for (int i = 0; i < classRangeCount; ++i)
{
records[i] = new ClassRangeRecord(
reader.ReadUInt16(), //start glyph id
reader.ReadUInt16(), //end glyph id
reader.ReadUInt16()); //classNo
}
classDefTable.records = records;
} break;
}
return classDefTable;
}
