Prototype: GemRB.SetButtonOverlay (WindowIndex, ControlIndex, Current, Max, r,g,b,a, r,g,b,a)

Metaclass Prototype: SetOverlay (ratio, r1,g1,b1,a1, r2,g2,b2,a2)

Description: Sets ratio (0-1.0) of height to which button picture will be overlaid in a different colour. The colour will fade from the first rgba values to the second.


  • Window, Button - the control’s reference
  • ClippingRatio - a floating point value from the 0-1 interval
  • rgba1 - source colour
  • rgba2 - target colour

Return value: N/A

See also: Button_SetPictureClipping

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