// Pulls out a Vertical Matric and updates hhea if necessary
public bool removeLongHorMetric(ushort nIndex)
{
bool bResult = true;
if (nIndex >= m_nGlyphsInTheFont)
{
bResult = false;
throw new ArgumentOutOfRangeException("Tried to remove a Vertical Matric that did not exist.");
}
else
{
// if we are removing a vertical matrix that is less the the number of long vertical
// metrics we need to adjust for this so we know how to write it later and fix up the hhea_table
if (nIndex < m_nNumberOfHMetrics)
{
m_nNumberOfHMetrics--;
Table_hhea.hhea_cache hheaCache = (Table_hhea.hhea_cache)m_hheaTable.GetCache();
hheaCache.numberOfHMetrics--;
}
// NOTE: Table maxp and ltsh numGlyphs isn't being dynamically updated
m_nGlyphsInTheFont--;
m_longHorMetric.RemoveAt(nIndex);
m_bDirty = true;
}
return(bResult);
}
// Does the real work of adding
protected bool addToLongHorMetric(ushort nIndex, ushort nAdvanceWidth, short nLeftSideBearing)
{
bool bResult = true;
// NOTE: This might not be OK we might want to add a glyph that is much greater the the number that is there now
if (nIndex >= m_nGlyphsInTheFont)
{
bResult = false;
throw new ArgumentOutOfRangeException("Tried to add a Vertical Matric to a position greater than the number of Glyphs + 1.");
}
else
{
// if we are adding a horiz matrix that is less the the number of NumberOfHMetrics
// we need to adjust for this so we know how to write it later and fix up the hhea_table
if (nIndex < m_nNumberOfHMetrics || (nIndex == m_nNumberOfHMetrics && nAdvanceWidth != 0))
{
m_nNumberOfHMetrics++;
Table_hhea.hhea_cache hheaCache = (Table_hhea.hhea_cache)m_hheaTable.GetCache();
hheaCache.numberOfHMetrics++;
}
// NOTE: Table maxp and ltsh numGlyphs isn't being dynamically updated
m_nGlyphsInTheFont++;
longHorMetric lhm = new longHorMetric();
lhm.advanceWidth = nAdvanceWidth;
lhm.lsb = nLeftSideBearing;
m_longHorMetric.Insert(nIndex, lhm);
m_bDirty = true;
}
return(bResult);
}