bool Validate_indexSubHeader(Validator v, indexSubHeader iSH, string sID, OTFontVal fontOwner)
{
bool bOk = true;
Table_EBDT EBDTTable = (Table_EBDT)fontOwner.GetTable("EBDT");
if (iSH.indexFormat < 1 || iSH.indexFormat > 5)
{
string sDetails = "invalid indexFormat: " + sID + ", indexFormat = " + iSH.indexFormat;
v.Error(T.EBLC_indexSubTables, E.EBLC_E_indexSubTables, m_tag, sDetails);
bOk = false;
}
if (iSH.imageFormat < 1 || iSH.imageFormat > 9 || iSH.imageFormat == 3)
{
string sDetails = "invalid imageFormat: " + sID + ", imageFormat = " + iSH.imageFormat;
v.Error(T.EBLC_indexSubTables, E.EBLC_E_indexSubTables, m_tag, sDetails);
bOk = false;
}
bool bInconsistentFormats = false;
if (iSH.indexFormat == 1 || iSH.indexFormat == 3 || iSH.indexFormat == 4)
{
if (iSH.imageFormat == 5)
{
bInconsistentFormats = true;
}
}
else
{
if (iSH.imageFormat != 5)
{
bInconsistentFormats = true;
}
}
if (bInconsistentFormats)
{
string sDetails = "inconsistent formats: " + sID + ", indexFormat = " + iSH.indexFormat + ", imageFormat = " + iSH.imageFormat;
v.Error(T.EBLC_indexSubTables, E.EBLC_E_indexSubTables, m_tag, sDetails);
bOk = false;
}
if (EBDTTable != null)
{
if (iSH.imageDataOffset > EBDTTable.GetLength())
{
string sDetails = "invalid imageDataOffset: " + sID + ", imageDataOffset = " + iSH.imageDataOffset;
v.Error(T.EBLC_indexSubTables, E.EBLC_E_indexSubTables, m_tag, sDetails);
bOk = false;
}
}
return(bOk);
}
bool Validate_indexSubTable_format4(Validator v, indexSubTable4 ist4, indexSubTableArray ista, string sID, OTFontVal fontOwner)
{
bool bOk = true;
Table_EBDT EBDTTable = (Table_EBDT)fontOwner.GetTable("EBDT");
// header has already been validated
// validate numGlyphs
uint nGlyphsInRange = (uint)ista.lastGlyphIndex - ista.firstGlyphIndex + 1;
if (ist4.numGlyphs > nGlyphsInRange)
{
string sDetails = "numGlyphs is invalid: " + sID +
", numGlyphs = " + ist4.numGlyphs +
", indexSubTableArray.firstGlyphIndex = " + ista.firstGlyphIndex +
", indexSubTableArray.lastGlyphIndex = " + ista.lastGlyphIndex;
v.Error(T.EBLC_indexSubTables, E.EBLC_E_indexSubTables, m_tag, sDetails);
bOk = false;
}
// validate code offset pairs
uint nEBDTLength = EBDTTable.GetLength();
for (ushort idGlyph = 0; idGlyph < ist4.numGlyphs; idGlyph++)
{
indexSubTable4.codeOffsetPair cop = ist4.GetCodeOffsetPair(idGlyph);
// glyph code
if (cop.glyphCode < ista.firstGlyphIndex || cop.glyphCode > ista.lastGlyphIndex)
{
string sDetails = "glyph code is invalid: " + sID +
", codeOffsetPair[" + idGlyph + "]" +
", indexSubTableArray.firstGlyphIndex = " + ista.firstGlyphIndex +
", indexSubTableArray.lastGlyphIndex = " + ista.lastGlyphIndex;
v.Error(T.EBLC_indexSubTables, E.EBLC_E_indexSubTables, m_tag, sDetails);
bOk = false;
}
// offset
if (cop.offset > nEBDTLength)
{
string sDetails = "invalid offset: " + sID +
", codeOffsetPair[" + idGlyph + "].offset = " + cop.offset +
", EBDT length = " + nEBDTLength;
v.Error(T.EBLC_indexSubTables, E.EBLC_E_indexSubTables, m_tag, sDetails);
bOk = false;
}
}
return(bOk);
}