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Re: [css3-background] possibly too late for last call, but: ?background-opacity?

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Sun, 2 May 2010 08:32:35 -0700
Message-ID: <j2ldd0fbad1005020832n5f5e0204q739f446163a40ca@mail.gmail.com>
To: Brad Kemper <brad.kemper@gmail.com>
Cc: Glen <glen.84@gmail.com>, www-style@w3.org
To expand on what Brad is saying, we're expecting something like an
opacity() function or similar that can opacify any image used in any


On Sun, May 2, 2010 at 7:51 AM, Brad Kemper <brad.kemper@gmail.com> wrote:
> That is something separate we are hoping for as part of an SVG filters for other (non-SVG) elements in CSS property. It's been a bit slow to come to fruition.
> On May 2, 2010, at 4:05 AM, Glen wrote:
>> I would also like this to be included ... I guess it's too late. :-(
>> There are quite a few people who have asked about this ("background opacity" on Google).
>> I can imagine fading a button's background (gradient or gradient image) from "less than opaque" to fully opaque on hover.
>> The same for border-opacity.
>> If it's impossible to include these features in CSS 3, might they be included in "3.1"?
>> Glen.
>>> Patrick H. Lauke wrote:
>>> >  First time dipping my toe in this list, and appreciate that it's
>>> >  probably far too late for last call, but...
>>> >
>>> >  One feature I would have really loved to see is the ability to specify
>>> >  opacity for background images. I know this is technically possible by
>>> >  using formats such as PNG-24 with encoded alpha information, but I could
>>> >  envisage an actual CSS property to allow for further flexibility
>>> >  (particularly when layering multiple backgrounds, or when wanting to
>>> >  change background opacity depending on user interaction or similar).
>>> >
>>> >  If it's already too late to suggest anything new like this, could this
>>> >  be taken into consideration for a follow-up point release perhaps?
>>> The CSS Working Group has resolved not to add 'background-opacity'
>>> to the CSS3 Backgrounds and Borders module. We are considering this
>>> functionality for the future (e.g. see discussion about filters from
>>> <http://lists.w3.org/Archives/Public/www-style/2009Nov/0252.html>)
>>> but it likely will not be expressed as a 'background-opacity' property.
>>> Please let me know if this is acceptable. :)
>>> ~fantasai
Received on Sunday, 2 May 2010 15:33:28 UTC

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