Enum CairoOperator Is OperatorATop, OperatorAdd, OperatorClear, OperatorDest, OperatorDestATop, OperatorDestIn, OperatorDestOut, OperatorDestOver, OperatorIn, OperatorOut, OperatorOver, OperatorSaturate, OperatorSource, OperatorXor

Constant	Description
OperatorATop	Compositing operator that draws the source on top of destination content and only there.
OperatorAdd	Compositing operator that accumulates the source and destination layers.
OperatorClear	Compositing operator that clears the destination layer (bounded).
OperatorDest	Compositing operator that ignores the source.
OperatorDestATop	Compositing operator that leaves the destination on top of source content and only there (unbounded).
OperatorDestIn	Compositing operator that leaves the destination only where there was source content (unbounded).
OperatorDestOut	Compositing operator that leaves the destination only where there was no source content.
OperatorDestOver	Compositing operator that draws the destination on top of the source.
OperatorIn	Compositing operator that draws the source where there was destination content (unbounded).
OperatorOut	Compositing operator that draws the source where there was no destination content (unbounded).
OperatorOver	Compositing operator that draws the source layer on top of the destination layer (bounded).
OperatorSaturate	Compositing operator that behaves like OperatorOver, but assuming source and dest are disjoint geometries.
OperatorSource	Compositing operator that replaces the destination layer (bounded).
OperatorXor	Compositing operator that shows source and destination where there is only one of them.