public uint FastMapUnicode32ToGlyphID(uint c)
{
// this routine caches the windows 3,10 cmap for better performance
// but might use tons of heap
uint glyphID = 0xffffffff;
if (m_arrUnicodeToGlyph_3_10 == null)
{
Table_cmap cmapTable = (Table_cmap)GetTable("cmap");
if (cmapTable != null)
{
Table_cmap.Format12 subtable = (Table_cmap.Format12)cmapTable.GetSubtable(3, 10);
// Apple Color Emoji does not have a 3.10 charmap
if (subtable == null)
{
return(glyphID);
}
Table_cmap.Format12.Group g = subtable.GetGroup(subtable.nGroups - 1);
uint nArraySize = g.endCharCode + 1;
m_arrUnicodeToGlyph_3_10 = new uint[nArraySize];
for (uint i = 0; i < nArraySize; i++)
{
m_arrUnicodeToGlyph_3_10[i] = 0;
}
for (uint nGroup = 0; nGroup < subtable.nGroups; nGroup++)
{
g = subtable.GetGroup(nGroup);
for (uint i = 0; i <= g.endCharCode - g.startCharCode; i++)
{
m_arrUnicodeToGlyph_3_10[g.startCharCode + i] = g.startGlyphID + i;
}
}
}
}
Debug.Assert(m_arrUnicodeToGlyph_3_10 != null);
if (m_arrUnicodeToGlyph_3_10 != null)
{
if (c >= m_arrUnicodeToGlyph_3_10.Length)
{
return(0);
}
glyphID = m_arrUnicodeToGlyph_3_10[c];
}
return(glyphID);
}
public bool HaveNonBMPChars()
{
Table_cmap cmapTable = (Table_cmap)GetTable("cmap");
if (cmapTable != null)
{
Table_cmap.Format12 subtable = (Table_cmap.Format12)cmapTable.GetSubtable(3, 10);
if (subtable != null)
{
return(true);
}
}
return(false);
}
