Re: [fxtf-drafts] [css-compositing-2] Remove or fix definition of plus-darker (#447)

Comments in Apple source code say:
```
//        /* R = MAX(0, 1 - ((1 - D) + (1 - S))). {R, S and D are premultiplied
//           so actually R = MAX(0, (Da+Sa) - ((Da - D) + (Sa - S))) } */
//                         = MAX(0, Da + Sa - Da + D - Sa + S
//                         = MAX(0, D + S)
```
Where R=result, D=destination, S=source as premultiplied values.


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Received on Tuesday, 31 October 2023 21:46:23 UTC