public override bool TransformOne(GlyphLine line)
{
if (line.idx >= line.end)
{
return(false);
}
if (openReader.IsSkip(line.Get(line.idx).GetCode(), lookupFlag))
{
line.idx++;
return(false);
}
int glyphCode = line.Get(line.idx).GetCode();
bool positionApplied = false;
GposValueRecord valueRecord = valueRecordMap.Get(glyphCode);
if (valueRecord != null)
{
Glyph newGlyph = new Glyph(line.Get(line.idx));
newGlyph.xAdvance += (short)valueRecord.XAdvance;
newGlyph.yAdvance += (short)valueRecord.YAdvance;
line.Set(line.idx, newGlyph);
positionApplied = true;
}
line.idx++;
return(positionApplied);
}
protected internal override void ReadSubTable(int subTableLocation)
{
openReader.rf.Seek(subTableLocation);
openReader.rf.ReadShort();
int coverage = openReader.rf.ReadUnsignedShort();
int valueFormat = openReader.rf.ReadUnsignedShort();
GposValueRecord valueRecord = OtfReadCommon.ReadGposValueRecord(openReader, valueFormat);
IList <int> coverageGlyphIds = openReader.ReadCoverageFormat(subTableLocation + coverage);
foreach (int?glyphId in coverageGlyphIds)
{
valueRecordMap.Put((int)glyphId, valueRecord);
}
}
public static GposValueRecord ReadGposValueRecord(OpenTypeFontTableReader tableReader, int mask)
{
GposValueRecord vr = new GposValueRecord();
if ((mask & 0x0001) != 0)
{
vr.XPlacement = tableReader.rf.ReadShort() * 1000 / tableReader.GetUnitsPerEm();
}
if ((mask & 0x0002) != 0)
{
vr.YPlacement = tableReader.rf.ReadShort() * 1000 / tableReader.GetUnitsPerEm();
}
if ((mask & 0x0004) != 0)
{
vr.XAdvance = tableReader.rf.ReadShort() * 1000 / tableReader.GetUnitsPerEm();
}
if ((mask & 0x0008) != 0)
{
vr.YAdvance = tableReader.rf.ReadShort() * 1000 / tableReader.GetUnitsPerEm();
}
if ((mask & 0x0010) != 0)
{
tableReader.rf.Skip(2);
}
if ((mask & 0x0020) != 0)
{
tableReader.rf.Skip(2);
}
if ((mask & 0x0040) != 0)
{
tableReader.rf.Skip(2);
}
if ((mask & 0x0080) != 0)
{
tableReader.rf.Skip(2);
}
return(vr);
}
