W3C home > Mailing lists > Public > www-svg@w3.org > July 2012

Re: mask: luminance or alpha

From: Rik Cabanier <cabanier@gmail.com>
Date: Mon, 30 Jul 2012 19:31:55 -0700
Message-ID: <CAGN7qDB5dwD14WnBZtsz=uZgJ3FXm_Uff9dqETAKXUhw9O5rQA@mail.gmail.com>
To: Dirk Schulze <dschulze@adobe.com>
Cc: Rik Cabanier <cabanier@adobe.com>, "Tab Atkins Jr." <jackalmage@gmail.com>, "www-svg@w3.org" <www-svg@w3.org>
Any vector artwork created from any Adobe application, InkScape, CorelDraw
and XAML.
My number does not include Flash since it doesn't have luminosity masks
(only alpha) so people didn't have choice but I've seen workaround using
pixelbender.

For some operations that look like they could use alpha masks (like
gradient shadows), our products still use luminosity. I can't remember the
details but I can ask.

Rik

On Mon, Jul 30, 2012 at 5:16 PM, Dirk Schulze <dschulze@adobe.com> wrote:

>
> On Jul 30, 2012, at 4:57 PM, "Rik Cabanier" <cabanier@adobe.com> wrote:
>
> > Looking at current vector artwork, 99.99% is using luminosity.
> That is an interesting number, where did you get this number and which
> vector artwork are you referring?
>
> Dirk
>
> > It's much easier to manipulate for a designer than alpha (since it's
> easier to visualize and since overlapping elements with alpha interact with
> each other)
> >
> > Rik
> >
> >> -----Original Message-----
> >> From: Tab Atkins Jr. [mailto:jackalmage@gmail.com]
> >> Sent: Monday, July 30, 2012 4:48 PM
> >> To: Rik Cabanier
> >> Cc: www-svg@w3.org
> >> Subject: Re: mask: luminance or alpha
> >>
> >> On Mon, Jul 30, 2012 at 4:13 PM, Rik Cabanier <cabanier@adobe.com>
> >> wrote:
> >>> Last week, there was a decision to have the id-less mask have ‘alpha’
> >>> as the default instead of ‘luminance’
> >>>
> >>> Can someone explain the rational for doing this again?
> >>>
> >>> It changes existing default behavior, is not what people want or what
> >>> products like Illustrator and InkScape currently support.
> >>
> >> The idea is that this *is* what people want.  We just can't change
> <mask>'s
> >> default behavior due to legacy compat.
> >>
> >> ~TJ
>
Received on Tuesday, 31 July 2012 02:32:22 GMT

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