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Specifies the Porter Duff compositing method in which two pixels (source and destination) may contribute to the final color of the pixel.
BoundedCopy: 2;
The source is copied to the destination, excluding the transparent pixels.
Clear: 0;
No regions are enabled.
Copy: 1;
Only the source will be present.
Destination: 3;
Only the destination will be present.
DestinationAtop: 11;
Destination which overlaps the source replaces the source. Source is placed elsewhere.
DestinationIn: 7;
Destination which overlaps the source, replaces the source.
DestinationOut: 9;
Destination is placed, where it falls outside of the source.
DestinationOver: 5;
Destination is placed over the source.
Lighter: 13;
Display the sum of the source image and destination image.
SourceAtop: 10;
Source which overlaps the destination, replaces the destination. Destination is placed elsewhere.
SourceIn: 6;
The source that overlaps the destination, replaces the destination.
SourceOut: 8;
Source is placed, where it falls outside of the destination.
SourceOver: 4;
Source is placed over the destination.
XOR: 12;
The non-overlapping regions of source and destination are combined.