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| const byte | CLEAR = 0 |
| | Clear the destination.
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| const byte | SOURCE = 1 |
| | Copy source as-is to the destination.
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| const byte | DESTINATION = 2 |
| | Leave the destination as-is.
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| const byte | OVER = 3 |
| | Copy the source over the destination.
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| const byte | UNDER = 4 |
| | Copy the source under the destination.
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| const byte | INSIDE = 5 |
| | Copy the source to the destination.
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| const byte | INSIDE_REVERSE = 6 |
| | Leave the destination as is.
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| const byte | OUTSIDE = 7 |
| | Copy the source to the destination.
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| const byte | OUTSIDE_REVERSE = 8 |
| | Leave the destination as is.
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| const byte | ATOP = 9 |
| | Copy the source over the destination.
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| const byte | ATOP_REVERSE = 10 |
| | Copy the destination over the source.
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| const byte | XOR = 11 |
| | Combine source and destination by exclusive or.
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| const byte | ADD = 12 |
| | Add source and destination values.
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| const byte | SATURATE = 13 |
| | Saturate source and destination.
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