wx.CompositionMode

The CompositionMode enumeration provides the following values:

Description	Value
wx.COMPOSITION_INVALID	Indicates invalid or unsupported composition mode.
wx.COMPOSITION_CLEAR	R = 0
wx.COMPOSITION_SOURCE	R = S
wx.COMPOSITION_OVER	R = S + D*`(1 - `Sa)
wx.COMPOSITION_IN	R = S* Da `
wx.COMPOSITION_OUT	R = S*`(1 - `Da)
wx.COMPOSITION_ATOP	R = S* Da + D*`(1 - `Sa)
wx.COMPOSITION_DEST	R = D, essentially a noop
wx.COMPOSITION_DEST_OVER	R = S*`(1 - `Da) + D
wx.COMPOSITION_DEST_IN	R = D* Sa `
wx.COMPOSITION_DEST_OUT	R = D*`(1 - `Sa)
wx.COMPOSITION_DEST_ATOP	R = S*`(1 - `Da) + D* Sa `
wx.COMPOSITION_XOR	R = S*`(1 - `Da) + D*`(1 - `Sa)
wx.COMPOSITION_ADD	R = S + D
wx.COMPOSITION_DIFF	Result is the absolute value of the difference between the source and the destination.