Re: [E-devel] more tiff alpha weirdness

2006-01-06 Thread The Rasterman
On Thu, 5 Jan 2006 12:07:12 + Simon Wistow <[EMAIL PROTECTED]> babbled: > Apparently TIFF has not one but two types of Alpha channel Associated > and UnAssociated. The premultiplication of the r,g and b channels by > 255/a on load should only be done with UnAssociated alpha channels > (whic

[E-devel] more tiff alpha weirdness

2006-01-05 Thread Simon Wistow
Apparently TIFF has not one but two types of Alpha channel Associated and UnAssociated. The premultiplication of the r,g and b channels by 255/a on load should only be done with UnAssociated alpha channels (which seems to be counter-intuitive to me but what the hell). The previous patch that Ra