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...stretch a bitmap?
Autor: Frank Ditsche
Homepage: www.fditsche.de
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Tip Rating (27):  
     


// This function stretches a bitmap with specified number of pixels
// in horizontal, vertical dimension
// Example Call : ResizeBmp(Image1.Picture.Bitmap , 200 , 200);

// Diese Funktion zerrt eine Bitmap in die anzugebenden Pixel
// Beispielaufruf : ResizeBmp(Image1.Picture.Bitmap , 200 , 200);

function TForm1.ResizeBmp(bitmp: TBitmap; wid, hei: Integer): Boolean;
var 
  
TmpBmp: TBitmap;
  ARect: TRect;
begin
  
Result := False;
  try
    
TmpBmp := TBitmap.Create;
    try
      
TmpBmp.Width  := wid;
      TmpBmp.Height := hei;
      ARect := Rect(0,0, wid, hei);
      TmpBmp.Canvas.StretchDraw(ARect, Bitmp);
      bitmp.Assign(TmpBmp);
    finally
      
TmpBmp.Free;
    end;
    Result := True;
  except
    
Result := False;
  end;
end;

 

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