Вставить Bitmap

function
 InvertBmp1(SourceBmp: TBitmap): TBitMap;
 var

   i, j: Longint;
   tmp: TBitMap;
   red, green, blue: Byte;
   PixelColor: Longint;
 begin

   tmp := TBitmap.Create;
   tmp.Width  := SourceBmp.Width;
   tmp.Height := SourceBmp.Height;
   for
 i := 0 to
 SourceBmp.Width - 1 do

   begin

     for
 j := 0 to
 SourceBmp.Height - 1 do

     begin

       PixelColor := ColorToRGB(SourceBmp.Canvas.Pixels[i, j]);
       red := PixelColor;
       green := PixelColor shr
 8;
       blue := PixelColor shr
 16;
       red  := 255 - red;
       green := 255 - green;
       blue := 255 - blue;
       tmp.Canvas.pixels[i, j] := (red shl
 8 + green) shl
 8 + blue;
     end
;
   end
;
   Result := tmp;
 end
;

 function
 InvertBmp2(ABitmap : TBitmap) : TBitmap;
 var

   l_bmp : TBitmap;
 begin

   l_bmp := TBitmap.Create;
   l_bmp.Width := ABitmap.Width;
   l_bmp.Height := ABitmap.Height;
   l_bmp.PixelFormat := ABitmap.PixelFormat;
   BitBlt( l_bmp.Canvas.Handle, 0, 0, l_bmp.Width, l_bmp.Height,
     ABitmap.Canvas.Handle, 0, 0, SRCINVERT );
   result := l_bmp;
 end
;

Другое по теме:

• Bitmap без формы
• Bitmap.Scanline для PixelFormat
• Вращать Bitmap вокруг точки