W3C home > Mailing lists > Public > www-style@w3.org > December 2011

Re: [css3-background] ‘background-size’ and SVG images

From: fantasai <fantasai.lists@inkedblade.net>
Date: Mon, 19 Dec 2011 10:19:11 -0800
Message-ID: <4EEF801F.7000407@inkedblade.net>
To: "Dr. Olaf Hoffmann" <Dr.O.Hoffmann@gmx.de>
CC: www-style@w3.org
On 11/17/2009 07:16 AM, Dr. Olaf Hoffmann wrote:
> Hello,
>
> this comment is about
> http://www.w3.org/TR/2009/WD-css3-background-20091015/#the-background-size
>
> Due to another discussion I tried to understand the
> behaviour of background-size especially for SVG images as background images.
>
> I could not derive the intended behaviour if the SVG image contains
> information within the preserveAspectRatio attribute such as 'none' or
> for example 'xMidYMid slice' (can be pretty useful for complex patterns of
> finite size, for example for a Penrose pattern, obviously the intention of
> the author is, to cut off parts not fitting to the aspect ratio of the
> viewport instead of meeting the viewport with areas without a pattern
> specified), if such an image is used in combination with background-size.
> I can image, how it works without background-size, but with seems to
> provide even more possibilities (and complications as well).
>
> Does the information from preserveAspectRatio take precedence, if
> available?

CSS sizes the box by using the intrinsic dimensions / ratio only.
Once it sizes the box, the SVG paints itself into that box. How
it paints into that box is defined by SVG. See
   http://www.w3.org/TR/css3-images/#sizing

~fantasai
Received on Monday, 19 December 2011 18:19:41 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 17:20:47 GMT