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Graphics programming under Windows with Delphi.

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Complicated drawing in background

If you have a complicated drawing to create (e.g. a fractal) you may want to

  • make sure that you do the drawing only one time
  • though make sure that your picture is refreshed when needed

    Solution:

    Draw on a bitmap in memory and draw this bitmap on the form's canvas in the OnPaint.
    With D3 you could use the scanline-property for this which is very fast compared to
    drawing on a canvas.

  • Generated 16:01:54 on Dec 6, 2019