| Value | Meaning |
|---|---|
| None | normal rendering (i.e. render path instead of modifying clip region) |
| Union | old mask will be masked with the current one; this is the default mode for clip |
| Or | new mask will be added to the current one (logical OR operation); |
| Xor | new mask will be logically XORed with the current one |
| Sub | "subtract" current path from mask |
| Replace | replace current mask |
| AddOr | Synonym |
Mask combining more