Should negative width in image produce mirroring?

Processing Coding Questions
3

Thank you @neilcsmith, good find. It’s not documented.
It would work like this:

  // 1. original
  image(canvas, 0, 0);

  // 2. horizontal flip 
  image(canvas, 0, 0, canvas.width, canvas.height, 
        canvas.width, 0, 0, canvas.height);
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