Re: premultiplying alpha

2010-05-05 Thread Thomas Davie
On 5 May 2010, at 06:05, Ken Ferry wrote: On Tue, May 4, 2010 at 9:30 AM, David Duncan david.dun...@apple.com wrote: On May 4, 2010, at 8:57 AM, Thomas Davie wrote: After much searching about, I discovered (contrary to what the docs say), that NSBitmapImageReps do not always

Re: premultiplying alpha

2010-05-04 Thread David Duncan
On May 4, 2010, at 8:57 AM, Thomas Davie wrote: After much searching about, I discovered (contrary to what the docs say), that NSBitmapImageReps do not always premultiply their r/g/b by their alpha. Because of this, I've dived in, and attempted to write my own premultiplication, but

Re: premultiplying alpha

2010-05-04 Thread Ken Ferry
On Tue, May 4, 2010 at 9:30 AM, David Duncan david.dun...@apple.com wrote: On May 4, 2010, at 8:57 AM, Thomas Davie wrote: After much searching about, I discovered (contrary to what the docs say), that NSBitmapImageReps do not always premultiply their r/g/b by their alpha. I think you're