
Prototype: GemRB.SetButtonOverlay(Window, Button, 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.

Parameters: 
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: SetButtonPictureClipping

