Как работать с Fade для TImage?

type 
  PRGBTripleArray = ^TRGBTripleArray; 
  TRGBTripleArray = array[0..32767] of TRGBTriple; 
 
  ///////////////////////////////////////////////// 
  //                  Fade In                    // 
  ///////////////////////////////////////////////// 
 
 
procedure FadeIn(ImageFileName: TFileName); 
var 
  Bitmap, BaseBitmap: TBitmap; 
  Row, BaseRow: PRGBTripleArray; 
  x, y, step: integer; 
begin 
  // Bitmaps vorbereiten / Preparing the Bitmap // 
  Bitmap := TBitmap.Create; 
  try 
    Bitmap.PixelFormat := pf32bit;  // oder pf24bit / or pf24bit // 
    Bitmap.LoadFromFile(ImageFileName); 
    BaseBitmap := TBitmap.Create; 
    try 
      BaseBitmap.PixelFormat := pf32bit; 
      BaseBitmap.Assign(Bitmap); 
      // Fading // 
      for step := 0 to 32 do 
      begin 
        for y := 0 to (Bitmap.Height - 1) do 
        begin 
          BaseRow := BaseBitmap.Scanline[y]; 
          // Farben vom Endbild holen / Getting colors from final image // 
          Row := Bitmap.Scanline[y]; 
          // Farben vom aktuellen Bild / Colors from the image as it is now // 
          for x := 0 to (Bitmap.Width - 1) do 
          begin 
            Row[x].rgbtRed := (step * BaseRow[x].rgbtRed) shr 5; 
            Row[x].rgbtGreen := (step * BaseRow[x].rgbtGreen) shr 5; // Fading // 
            Row[x].rgbtBlue := (step * BaseRow[x].rgbtBlue) shr 5; 
          end; 
        end; 
        Form1.Canvas.Draw(0, 0, Bitmap);   // neues Bild ausgeben / Output new image // 
        InvalidateRect(Form1.Handle, nil, False); 
        // Fenster neu zeichnen / Redraw window // 
        RedrawWindow(Form1.Handle, nil, 0, RDW_UPDATENOW); 
      end; 
    finally 
      BaseBitmap.Free; 
    end; 
  finally 
    Bitmap.Free; 
  end; 
end; 
 
///////////////////////////////////////////////// 
//                  Fade Out                   // 
///////////////////////////////////////////////// 
 
 
procedure FadeOut(ImageFileName: TFileName); 
var 
  Bitmap, BaseBitmap: TBitmap; 
  Row, BaseRow: PRGBTripleArray; 
  x, y, step: integer; 
begin 
  // Bitmaps vorbereiten / Preparing the Bitmap // 
  Bitmap := TBitmap.Create; 
  try 
    Bitmap.PixelFormat := pf32bit;  // oder pf24bit / or pf24bit // 
    Bitmap.LoadFromFile(ImageFileName); 
    BaseBitmap := TBitmap.Create; 
    try 
      BaseBitmap.PixelFormat := pf32bit; 
      BaseBitmap.Assign(Bitmap); 
      // Fading // 
     for step := 32 downto 0 do 
      begin 
        for y := 0 to (Bitmap.Height - 1) do 
        begin 
          BaseRow := BaseBitmap.Scanline[y]; 
          // Farben vom Endbild holen / Getting colors from final image // 
          Row := Bitmap.Scanline[y]; 
          // Farben vom aktuellen Bild / Colors from the image as it is now // 
          for x := 0 to (Bitmap.Width - 1) do 
          begin 
            Row[x].rgbtRed := (step * BaseRow[x].rgbtRed) shr 5; 
            Row[x].rgbtGreen := (step * BaseRow[x].rgbtGreen) shr 5; // Fading // 
            Row[x].rgbtBlue := (step * BaseRow[x].rgbtBlue) shr 5; 
          end; 
        end; 
        Form1.Canvas.Draw(0, 0, Bitmap);   // neues Bild ausgeben / Output new image // 
        InvalidateRect(Form1.Handle, nil, False); 
        // Fenster neu zeichnen / Redraw window // 
        RedrawWindow(Form1.Handle, nil, 0, RDW_UPDATENOW); 
      end; 
    finally 
      BaseBitmap.Free; 
    end; 
  finally 
    Bitmap.Free; 
  end; 
end; 
 
 
procedure TForm1.Button1Click(Sender: TObject); 
begin 
  FadeIn('C:\TestImage.bmp') 
end; 
 
 
{*****************************} 
 {by Yucel Karapinar, ykarapinar@hotmail.com } 
 
{ Only for 24 ve 32 bits bitmaps } 
 
procedure FadeOut(const Bmp: TImage; Pause: Integer); 
var 
  BytesPorScan, counter, w, h: Integer; 
  p: pByteArray; 
begin 
  if not (Bmp.Picture.Bitmap.PixelFormat in [pf24Bit, pf32Bit]) then 
    raise Exception.Create('Error, bitmap format is not supporting.'); 
  try 
    BytesPorScan := Abs(Integer(Bmp.Picture.Bitmap.ScanLine[1]) - 
      Integer(Bmp.Picture.Bitmap.ScanLine[0])); 
  except 
    raise Exception.Create('Error!!'); 
  end; 
 
  for counter := 1 to 256 do 
  begin 
    for h := 0 to Bmp.Picture.Bitmap.Height - 1 do 
    begin 
      P := Bmp.Picture.Bitmap.ScanLine[h]; 
      for w := 0 to BytesPorScan - 1 do 
        if P^[w] > 0 then P^[w] := P^[w] - 1; 
    end; 
    Sleep(Pause); 
    Bmp.Refresh; 
  end; 
end; 
 
procedure TForm1.Button2Click(Sender: TObject); 
begin 
  FadeOut(Image1, 1); 
end; 

Взято с сайта https://www.swissdelphicenter.ch/en/tipsindex.php