public override void blend_solid_vspan(int x, int y, int len, Color c, byte[] covers, int coversIndex)
{
throw new System.NotImplementedException();
#if false
init_span((int)len, covers);
unsafe
{
fixed(byte *pBuffer = m_span.Array)
{
m_mask.combine_vspan(x, y, pBuffer, (int)len);
m_LinkedImage.blend_solid_vspan(x, y, len, c, pBuffer);
}
}
#endif
}
