W3C home > Mailing lists > Public > www-style@w3.org > August 2012

Re: [filter-effects] apply filter to border and background

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Fri, 17 Aug 2012 10:02:23 -0700
Message-ID: <CAAWBYDDnbShYvRkwBs=krrERCgbw3FRS89+drWx=zDE19nT41A@mail.gmail.com>
To: Dirk Schulze <dschulze@adobe.com>
Cc: www-style list <www-style@w3.org>, Brad Kemper <brad.kemper@gmail.com>
On Thu, Aug 16, 2012 at 6:09 PM, Dirk Schulze <dschulze@adobe.com> wrote:
> Hi CSS folks,
> I created an initial Wiki page for discussing a request of the CSS WG to support filter effects on just backgrounds or just borders as well. [1]
> I want to collect proposals as well as pros and cons to find the best decision to address this request.
> a) The first proposal is adding new properties for background and border:
> * 'background-filter'
> * 'border-filter'
> These properties have the same syntax and semantic as the 'filter' property.
> The benefit that I see is that you can apply different filters to different component of an element (border, mask or content). But it means adding two new properties.
> b) The second proposal is adding a new keyword to Filter Effects named 'filter-target' with the keywords
> * border
> * background
> * group
> * (content)
> 'content' might not be necessary, since you can group child elements and filter the whole group.
> The benefit is that we just need one new property that is defined within Filter Effects and without modification of CSS Backgrounds and Borders.
> It seems to be harder to define different filters to different components (filter1 on the border, filter2 on the background).
> SVG may also apply filters on different components of a shape. This could be done with the SVG Vector Effects proposal [2]. The 'filter' property would just be applied to each single vector effect.
> Greetings,
> Dirk
> [1] http://www.w3.org/Graphics/fx/wiki/Filter_Effects:_background_and_border_filter
> [2] http://www.w3.org/TR/2004/WD-SVG12-20041027/vectoreffects.html

Brad Kemper's old proposal from the 2009 TPAC was to accompany each
filter with a list of keywords representing filterable sub-parts of
the element, and the filter would be applied to the union of those

I think his pieces were [ [ border || background || text ] | all ],
with filters assuming "all" if not otherwise specified.  Brad can
correct me with pointers to his old proposal, though.

Received on Friday, 17 August 2012 17:03:11 UTC

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