Definitely a bug. Some of these are on file, some are not: http://webkit.org/quality/reporting.html
-eric On Tue, Feb 2, 2010 at 8:17 AM, Leif Arne Storset <[email protected]> wrote: > Hello, > > While doing some SVG-related work over here I discovered that WebKit's > rendering of SVG in <img> tags differs from Opera's. Since WebKit and > Opera to my knowledge are the only engines that currently support SVG in > <img> we thought it would be worthwhile to make sure we are compatible. > > As far as I can tell from the latest nightly builds (and the latest Chrome > release on Linux), WebKit will render an SVG in <img> much like a bitmap: > it will resolve the width and height of the image and stretch it to fill > the content box. It will respect any viewbox (presumably synthesizing one > if it is missing), but preserveAspectRatio [1] seems not to be applied to > an SVG in <img>, and the default rendering (whether there is a viewbox or > not) is as if preserveAspectRatio="none". > > Opera (Presto engine) will also resolve image dimensions and synthesize > missing viewboxes, and will synthesize a viewBox if it can, as outlined > in SVG WG ISSUE-2258 [2], and applies preserveAspectRatio as specified in > SVG 1.1 (note that pAR has a default value 'xMidYMid meet'). The viewBox > (whether specified or synthetic) are used together with pAR when rendering > the SVG into the viewport established by the <img> element. > > The attached images and test case illustrate the two renderings. > > A quick Google search of webkit.org revealed little on preserveAspectRatio > except a reference to a 2008 bug in SVGImageElement. However, for > <svg:image> (that is: <image> elements inside of an <svg>), pAR seems to > be applied as per the spec. > > We believe that not applying the pAR on svg in <img> means that WebKit > has invalid rendering behaviour according to the SVG 1.1 specification. > > To enhance cross-browser compatibility it would be good if WebKit also > considered synthesizing viewBoxes as outlined in [2], as this makes it > easier to reuse existing svg content created by svg editors such as > Inkscape (such content most often has a width and height, but lacks a > viewBox). > > I hope you find these recommendations useful. Please let me know if I can > be of further assistance. If desired I can file a bug in your issue > tracker. > > -- > Leif Arne Storset > Layout developer, Opera Software > > [1] http://www.w3.org/TR/SVG11/coords.html#PreserveAspectRatioAttribute > [2] http://www.w3.org/Graphics/SVG/WG/track/issues/2258 > _______________________________________________ > webkit-dev mailing list > [email protected] > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > > _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
