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...encrypt a image?
Autor: adet
[ Print tip ]  

Tip Rating (5):  
     




procedure EncryptBMP(const BMP: TBitmap; Key: Integer);
var
  
BytesPorScan: Integer;
  w, h: integer;
  p: pByteArray;
begin
  try
    
BytesPorScan := Abs(Integer(BMP.ScanLine[1]) -
      Integer(BMP.ScanLine[0]));
  except
    raise 
Exception.Create('Error');
  end;
  RandSeed := Key;
  for h := 0 to BMP.Height - 1 do
  begin
    
P := BMP.ScanLine[h];
    for w := 0 to BytesPorScan - 1 do
      
P^[w] := P^[w] xor Random(256);
  end;
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
  
EncryptBMP(Image1.Picture.Bitmap, 623);
  Image1.Refresh;
end;

{ Call the function again to decrypt it }
{ Zum Entschlüsseln die Funktion nochmals aufrufen }

 

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