title: Drawing Antialiased Shapes
body: <p>I'm try to improve some of the drawing that I'm doing in my project by provide antialiasing. I'm playing with a simple project using the Graphics32 Library instead of the standard delphi Canvas functions. I am testing with simple shapes and noticed a blurring affect and was wondering if it could be fixed.</p>
  
  <pre><code>procedure TForm1.FormPaint(Sender: TObject);
  var
      Points : TArrayOfFixedPoint;
      ar: array [0 .. 6] of Tpoint;
  begin
      // Antialiased Triangle
      SetLength(Points, 3);
      Points[0] := FixedPoint(20, 20);
      Points[1] := FixedPoint(20 + 100, 20 + 20);
      Points[2] := FixedPoint(20, 20 + 20);
      PolygonFS(self.mBitmap, FixedPointToFloatPoint(Points), clYellow32, pfAlternate, nil); // Draw Filled Polygon
      PolylineFS(self.mBitmap, FixedPointToFloatPoint(Points), clBlack32, true, 1); // Draw Outline
  
      self.mBitmap.DrawTo(self.Canvas.Handle, 0, 0);
  
      // Normal Triangle
      ar[0] := point(20, 150);
      ar[1] := point(20 + 100, 150 + 20);
      ar[2] := point(20, 150 + 20);
      ar[3] := point(20, 150);
      self.Canvas.Brush.Color := clYellow;
      self.Canvas.Polygon(slice(ar, 3));
  end;
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/AnhCj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AnhCj.png" alt=""></a></p>
  
  <p>The antialiased triangle has a much smoother hypotenuse, but the two straight lines looks like they're blurred, which makes sense since it's antialiased. Is there a way to get the best of both worlds where the vertical and horizontal lines don't blend, while smoothing out the hypotenuse?</p>
  
  <p><strong>Edit:</strong>
  The version of Graphic32 I'm using is the top of the master branch from the <a href="https://github.com/graphics32/graphics32" rel="nofollow noreferrer" title="Official Github Fork">Official Github Fork</a> since the last release appears to be 1.9.1 from 2012.</p>