alpha

  if ( !v26 || !*v26 || (v28 = _stricmp(v26, sAlphaNone) == 0, v29 = 1, v28) )
    v29 = 0;
  *(_BYTE *)(v6 + 0x78) = v29;
  if ( !_stricmp(v27, sAlphaStandard) )
  {
    *(_DWORD *)(v6 + 0x7C) = 6;
    *(_DWORD *)(v6 + 0x80) = 7;
  }
  else if ( !_stricmp(v27, sAlphaAdditive) )
  {
    *(_QWORD *)(v6 + 0x7C) = 6i64;
  }
  else if ( !_stricmp(v27, sAlphaMultiplicative) )
  {
    *(_DWORD *)(v6 + 0x7C) = 4;
    *(_DWORD *)(v6 + 0x80) = 1;
  }