public ScriptRecord GetScriptRecord(uint i)
{
ScriptRecord sr = null;
if (i < ScriptCount)
{
uint offset = m_offsetScriptListTable + (uint)FieldOffsets.ScriptRecords + i*6;
sr = new ScriptRecord();
sr.ScriptTag = m_bufTable.GetTag(offset);
sr.ScriptTableOffset = m_bufTable.GetUshort(offset+4);
}
return sr;
}
public ScriptRecord GetScriptRecord(uint i)
{
ScriptRecord sr = null;
if (i < ScriptCount)
{
uint offset = m_offsetScriptListTable + (uint)FieldOffsets.ScriptRecords + i * 6;
sr = new ScriptRecord();
sr.ScriptTag = m_bufTable.GetTag(offset);
sr.ScriptTableOffset = m_bufTable.GetUshort(offset + 4);
}
return(sr);
}
public static ScriptList CreateFrom(BinaryReader reader, long beginAt)
{
reader.BaseStream.Seek(beginAt, SeekOrigin.Begin);
//https://www.microsoft.com/typography/otspec/chapter2.htm
//ScriptList table
//Type Name Description
//USHORT ScriptCount Number of ScriptRecords
//struct ScriptRecord
//[ScriptCount] Array of ScriptRecords
//-listed alphabetically by ScriptTag
//ScriptRecord
//Type Name Description
//Tag ScriptTag 4-byte ScriptTag identifier
//Offset Script Offset to Script table-from beginning of ScriptList
ScriptList scriptList = new ScriptList();
ushort scriptCount = reader.ReadUInt16();
ScriptRecord[] scRecords = scriptList.scriptRecords = new ScriptRecord[scriptCount];
for (int i = 0; i < scriptCount; ++i)
{
//read script record
scRecords[i] = new ScriptRecord(
reader.ReadUInt32(), //tag
reader.ReadInt16());//offset
}
//-------------
ScriptTable[] scriptTables = scriptList.scriptTables = new ScriptTable[scriptCount];
//then read each
for (int i = 0; i < scriptCount; ++i)
{
ScriptRecord scriptRecord = scRecords[i];
//move to
ScriptTable scriptTable = ScriptTable.CreateFrom(reader, beginAt + scriptRecord.offset);
scriptTable.scriptTag = scriptRecord.scriptTag;
scriptTables[i] = scriptTable;
}
return scriptList;
}
public static ScriptList CreateFrom(BinaryReader reader, long beginAt)
{
reader.BaseStream.Seek(beginAt, SeekOrigin.Begin);
//https://www.microsoft.com/typography/otspec/chapter2.htm
//ScriptList table
//Type Name Description
//USHORT ScriptCount Number of ScriptRecords
//struct ScriptRecord
//[ScriptCount] Array of ScriptRecords
//-listed alphabetically by ScriptTag
//ScriptRecord
//Type Name Description
//Tag ScriptTag 4-byte ScriptTag identifier
//Offset Script Offset to Script table-from beginning of ScriptList
ScriptList scriptList = new ScriptList();
ushort scriptCount = reader.ReadUInt16();
ScriptRecord[] scRecords = new ScriptRecord[scriptCount];
for (int i = 0; i < scriptCount; ++i)
{
//read script record
scRecords[i] = new ScriptRecord(
reader.ReadUInt32(), //tag
reader.ReadInt16()); //offset
}
//-------------
ScriptTable[] scriptTables = scriptList.scriptTables = new ScriptTable[scriptCount];
//then read each
for (int i = 0; i < scriptCount; ++i)
{
ScriptRecord scriptRecord = scRecords[i];
//move to
ScriptTable scriptTable = ScriptTable.CreateFrom(reader, beginAt + scriptRecord.offset);
scriptTable.scriptTag = scriptRecord.scriptTag;
scriptTables[i] = scriptTable;
}
return(scriptList);
}
public ScriptTable_val GetScriptTable_val(ScriptRecord sr)
{
return new ScriptTable_val((ushort)(m_offsetScriptListTable + sr.ScriptTableOffset), m_bufTable);
}
public ScriptTable_val GetScriptTable_val(ScriptRecord sr)
{
return(new ScriptTable_val((ushort)(m_offsetScriptListTable + sr.ScriptTableOffset), m_bufTable));
}
public bool Validate(Validator v, string sIdentity, OTTable table)
{
bool bRet = true;
bool bScriptListOk = true;
// check that ScriptRecord array doesn't extend past end of table
if (m_offsetScriptListTable + (uint)FieldOffsets.ScriptRecords + 6 * ScriptCount > m_bufTable.GetLength())
{
v.Error(T.T_NULL, E._OTL_ScriptListTable_E_ScriptRecordArray_pastEOT, table.m_tag, sIdentity);
bScriptListOk = false;
bRet = false;
}
// check that ScriptRecord array is in alphabetical order
if (ScriptCount > 1)
{
for (uint i = 0; i < ScriptCount - 1; i++)
{
ScriptRecord srCurr = GetScriptRecord(i);
ScriptRecord srNext = GetScriptRecord(i + 1);
if (srCurr.ScriptTag >= srNext.ScriptTag)
{
v.Error(T.T_NULL, E._OTL_ScriptListTable_E_ScriptRecordArray_order, table.m_tag, sIdentity);
bScriptListOk = false;
bRet = false;
}
}
}
// check each ScriptRecord
for (uint i = 0; i < ScriptCount; i++)
{
// check the tag
ScriptRecord sr = GetScriptRecord(i);
if (!sr.ScriptTag.IsValid())
{
v.Error(T.T_NULL, E._OTL_ScriptListTable_E_ScriptRecord_tag, table.m_tag, sIdentity + ", ScriptRecord[" + i + "]");
bScriptListOk = false;
bRet = false;
}
// check the offset
if (m_offsetScriptListTable + sr.ScriptTableOffset > m_bufTable.GetLength())
{
v.Error(T.T_NULL, E._OTL_ScriptListTable_E_ScriptRecord_offset, table.m_tag, sIdentity + ", ScriptRecord[" + i + "]");
bScriptListOk = false;
bRet = false;
}
// validate the ScriptTable
ScriptTable_val st = GetScriptTable_val(sr);
bRet &= st.Validate(v, sIdentity + ", ScriptRecord[" + i + "](" + sr.ScriptTag + "), ScriptTable", table);
}
if (bScriptListOk)
{
v.Pass(T.T_NULL, P._OTL_ScriptListTable_P_valid, table.m_tag, sIdentity);
}
return(bRet);
}
public void Script(byte[] script)
{
Write((seq, opt) => ScriptRecord.Write(seq, opt, script));
}
public virtual ScriptTable GetScriptTable(ScriptRecord sr)
{
return new ScriptTable((ushort)(m_offsetScriptListTable + sr.ScriptTableOffset), m_bufTable);
}
public virtual ScriptTable GetScriptTable(ScriptRecord sr)
{
return(new ScriptTable((ushort)(m_offsetScriptListTable + sr.ScriptTableOffset), m_bufTable));
}
