New filter: pre-multiply alpha

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Mercury13
Posts: 1
Joined: Mon Apr 25, 2016 9:01 am

New filter: pre-multiply alpha

Post by Mercury13 » Mon Apr 25, 2016 9:11 am

It should do the following:
1. Add an alpha channel, if it’s absent.
2. Modify it: alpha' = alpha · x.
Maybe, you’ll generalize it to all channels, etc.

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