On Tue, Feb 5, 2013 at 3:03 PM, Alan Gresley <alan@css-class.com> wrote: > On 5/02/2013 2:53 PM, Alan Gresley wrote: > > Brad. I'm just wondering what type of background you plan to use under >> any gradient with alpha transparency? >> >> A pre-multiplied gradient of yellow to transparent to blue is identical >> to a non pre-multiplied gradient of yellow to transparent-white to blue >> when composite on a white background. There is _no need_ for an extra >> color stop. >> > > Wrong and correction. A pre-multiplied gradient of yellow to transparent > to blue compiste of a whitye background is identical to a gradient of > yellow to white to blue (fully opaque). > > What do you want to achieve with a gradient that has alpha transparency > and have you tested any of this by observing the difference between > pre-multiplied colorspace and non pre-multiplied colorspace? Yes, that is correct except for the part where the gradient is transparent in the middle :-) So, yes, if you have a white background, they will look the same.
Received on Tuesday, 5 February 2013 04:15:42 UTC