public override int GetKerning(int char1, int char2)
{
int[] metrics = GetMetricsTT(char1);
if (metrics == null)
return 0;
int c1 = metrics[0];
metrics = GetMetricsTT(char2);
if (metrics == null)
return 0;
int c2 = metrics[0];
return kerning[(c1 << 16) + c2];
}