get-pixel

Gets the current color of a pixel in the drawing context.

Note that under X Windows, interleaving drawing commands with get-pixel calls in the same wx:dc% instance carries a substantial performance penalty.

• (send a-wx:dc get-pixel x y colour) -> boolean
      x : inexact real
      y : inexact real
      colour : wx:colour% object

  Fills colour with the color of the current pixel at position (x, y) in the drawing context. If the color is successfully obtained, the return value is #t, otherwise the result is #f.