Doubling BitMap(s)


   Suppose you have bitmap:

var
 Bmp1: TBitMap;
begin
 Bmp1 := TBitMap.Create;
 Bmp1.LoadFromFile(...);
...
...
end;


   How to make second BitMap that will be made off four Bmp1.
  (tiled, so that BMP2.width is equal to 2*Bmp1.width, and
   BMP2.Height is equal to 2Bmp1.Height)
bor061297Asked:
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erajojCommented:
This should work:

var
  Bmp1, Bmp2: TBitMap;
  x, y      : Integer;
begin
  Bmp1 := TBitMap.Create;
  Bmp2 := TBitMap.Create;
  Bmp1.LoadFromFile(...);
  Bmp2.Width  := Bmp1.Width*2;
  Bmp2.Height := Bmp1.Height*2;
  for x := 0 to 1 do for y := 0 to 1 do begin // tiling
    Bmp2.Canvas.Draw(x*Bmp1.Width, y*Bmp1.Height, Bmp1);
  end;
  Bmp1.Free; // If you don't need it anymore.
end;

Hope this is what you needed!

/// John

0

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