Method FillRectAreaOfScreen

rEFIt_UEFI/libeg/XTheme.cpp:592–610

the purpose of the procedure is restore Background in rect XAlign is always centre, Color is the Backgrounf fill TODO replace by some existing procedure

//XAlign is always centre, Color is the Backgrounf fill
//TODO replace by some existing procedure
VOID XTheme::FillRectAreaOfScreen(IN INTN XPos, IN INTN YPos, IN INTN Width, IN INTN Height)
{
  //  TmpBuffer.CopyScaled(Background, 1.f);
  INTN X = XPos - (Width >> 1);  //X_IS_CENTRE
  if (X < 0) {
    X = 0;
  }
  if (X + Width > UGAWidth) {
    Width = (X > UGAWidth) ? 0 : (UGAWidth - X);
  }
  if (YPos + Height > UGAHeight) {
    Height = (YPos > UGAHeight) ? 0 : (UGAHeight - YPos);
  }

  XImage TmpBuffer(Width, Height);
  TmpBuffer.CopyRect(Background, X, YPos); //a part of BackGround image
  TmpBuffer.DrawWithoutCompose(X, YPos);
  //  TmpBuffer.Draw(X, YPos, 0, true);
}