- From: Dirk Schulze via GitHub <sysbot+gh@w3.org>
- Date: Sun, 31 Dec 2017 07:18:39 +0000
- To: public-fxtf-archive@w3.org
@AmeliaBR Note: colors with 0 alpha is a special case. In your example, `feFlood` uses `flood-color="#888" flood-opacity="0"` so you know that you have a gray flooded area. That is not what the implementations see. If we assume premultiplied colors, then all colors with opacity of 0 result in a color value of 0. There is no way to compute the original unpremuliply color anymore. So your observation that for 0 alpha all implementations are operating on transparent black makes sense unless filter-effects would require to preserve the unpremultiplied color values of the input image which it currently doesn't. It just operates on un-premultiplied color values which means an implementation needs to convert premultiplied color values back to unpremultiplied color values. -- GitHub Notification of comment by dirkschulze Please view or discuss this issue at https://github.com/w3c/fxtf-drafts/issues/113#issuecomment-354589432 using your GitHub account
Received on Sunday, 31 December 2017 07:18:42 UTC