Timeline for Is this converting from or to premultiplied alpha?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Jan 30, 2016 at 17:17 | vote | accept | jzx | ||
| Jan 30, 2016 at 17:16 | history | edited | jzx | CC BY-SA 3.0 |
Added missing parentheses.
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| Jan 30, 2016 at 10:37 | comment | added | Pieter Geerkens |
Note that to avoid precision loss, and properly take advantage of the structure discovered by OP, the original operation should probably be: var r = (byte) ( (color.R*divAlpha + 0x80) >> 8);
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| Jan 30, 2016 at 10:12 | history | edited | Pieter Geerkens | CC BY-SA 3.0 |
added 229 characters in body
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| Jan 30, 2016 at 10:04 | history | answered | Pieter Geerkens | CC BY-SA 3.0 |