public JstfScriptRecord GetJstfScriptRecord(uint i)
{
JstfScriptRecord jsr = null;
if (i < JstfScriptCount)
{
uint offset = (uint)FieldOffsets.JstfScriptRecords + i * 6;
jsr = new JstfScriptRecord((ushort)offset, m_bufTable);
}
return(jsr);
}
public List <JstfScriptRecord> jstfScriptRecords; // Array of JstfScriptRecords, in alphabetical order by jstfScriptTag
public void Read(TTFReader r)
{
r.ReadInt(out this.majorVersion);
r.ReadInt(out this.minorVersion);
r.ReadInt(out this.jsftScriptCount);
this.jstfScriptRecords = new List <JstfScriptRecord>();
for (int i = 0; i < jsftScriptCount; ++i)
{
JstfScriptRecord rec = new JstfScriptRecord();
rec.Read(r);
this.jstfScriptRecords.Add(rec);
}
}
//The Justification table(JSTF) provides font developers with additional control over glyph substitution and
//positioning in justified text.
//Text-processing clients now have more options to expand or
//shrink word and glyph spacing so text fills the specified line length.
protected override void ReadContentFrom(BinaryReader reader)
{
//test this with Arial font
//JSTF header
//Type Name Description
//uint16 majorVersion Major version of the JSTF table, = 1
//uint16 minorVersion Minor version of the JSTF table, = 0
//uint16 jstfScriptCount Number of JstfScriptRecords in this table
//JstfScriptRecord jstfScriptRecords[jstfScriptCount] Array of JstfScriptRecords, in alphabetical order by jstfScriptTag
//----------
//JstfScriptRecord
//Type Name Description
//Tag jstfScriptTag 4-byte JstfScript identification
//Offset16 jstfScriptOffset Offset to JstfScript table, from beginning of JSTF Header
long tableStartAt = reader.BaseStream.Position;
//
ushort majorVersion = reader.ReadUInt16();
ushort minorVersion = reader.ReadUInt16();
ushort jstfScriptCount = reader.ReadUInt16();
JstfScriptRecord[] recs = new JstfScriptRecord[jstfScriptCount];
for (int i = 0; i < recs.Length; ++i)
{
recs[i] = new JstfScriptRecord(
Utils.TagToString(reader.ReadUInt32()),
reader.ReadUInt16()
);
}
_jsftScriptTables = new JstfScriptTable[recs.Length];
for (int i = 0; i < recs.Length; ++i)
{
JstfScriptRecord rec = recs[i];
reader.BaseStream.Position = tableStartAt + rec.jstfScriptOffset;
JstfScriptTable jstfScriptTable = ReadJstfScriptTable(reader);
jstfScriptTable.ScriptTag = rec.jstfScriptTag;
_jsftScriptTables[i] = jstfScriptTable;
}
}
public bool Validate(Validator v, OTFontVal fontOwner)
{
bool bRet = true;
// check the version
if (v.PerformTest(T.JSTF_Version))
{
if (Version.GetUint() == 0x00010000)
{
v.Pass(T.JSTF_Version, P.JSTF_P_Version, m_tag);
}
else
{
v.Error(T.JSTF_Version, E.JSTF_E_Version, m_tag, "0x" + Version.GetUint().ToString("x8"));
bRet = false;
}
}
// check the JstfScriptRecord array length
if (v.PerformTest(T.JSTF_JstfScriptRecord_length))
{
if ((uint)FieldOffsets.JstfScriptRecords + JstfScriptCount * 6 > m_bufTable.GetLength())
{
v.Error(T.JSTF_JstfScriptRecord_length, E.JSTF_E_Array_pastEOT, m_tag, "JstfScriptRecord array");
bRet = false;
}
}
// check that the JstfScriptRecord array is in alphabetical order
if (v.PerformTest(T.JSTF_JstfScriptRecord_order))
{
if (JstfScriptCount > 1)
{
for (uint i = 0; i < JstfScriptCount - 1; i++)
{
JstfScriptRecord jsrCurr = GetJstfScriptRecord_val(i);
JstfScriptRecord jsrNext = GetJstfScriptRecord_val(i + 1);
if (jsrCurr.JstfScriptTag >= jsrNext.JstfScriptTag)
{
v.Error(T.JSTF_JstfScriptRecord_order, E.JSTF_E_Array_order, m_tag, "JstfScriptRecord array");
bRet = false;
break;
}
}
}
}
// check each JstfScriptRecord
if (v.PerformTest(T.JSTF_JstfScriptRecords))
{
for (uint i = 0; i < JstfScriptCount; i++)
{
JstfScriptRecord_val jsr = GetJstfScriptRecord_val(i);
// check the tag
if (!jsr.JstfScriptTag.IsValid())
{
v.Error(T.JSTF_JstfScriptRecords, E.JSTF_E_tag, m_tag, "JstfScriptRecord[" + i + "]");
bRet = false;
}
// check the offset
if (jsr.JstfScriptOffset > m_bufTable.GetLength())
{
v.Error(T.JSTF_JstfScriptRecords, E.JSTF_E_Offset_PastEOT, m_tag, "JstfScriptRecord[" + i + "]");
bRet = false;
}
// validate the JstfScript table
JstfScript_val js = jsr.GetJstfScriptTable_val();
js.Validate(v, "JstfScriptRecord[" + i + "]", this);
}
}
return(bRet);
}
public JstfScriptRecord GetJstfScriptRecord(uint i)
{
JstfScriptRecord jsr = null;
if (i < JstfScriptCount)
{
uint offset = (uint)FieldOffsets.JstfScriptRecords + i*6;
jsr = new JstfScriptRecord((ushort)offset, m_bufTable);
}
return jsr;
}