Bug 89687 – Reloading a cached SVG image does not reset animations

• Component: SVG
• Status: RESOLVED INVALID

[Philip Rogers]

If a user refreshes a page, the animation continues from the exact state it was in just prior to the refresh.

There is a reproduction on this page: http://socializepalmsprings.com/archivereference/test-for-chromium/svg-as-img.html

Original bug: crbug.com/132870

[Nikolas Zimmermann]

From SVGImage.cpp:


void SVGImage::drawSVGToImageBuffer(ImageBuffer* buffer, const IntSize& size, float zoom, float scale, ShouldClearBuffer shouldClear)
{
    // FIXME: This doesn't work correctly with animations. If an image contains animations, that say run for 2 seconds,
    // and we currently have one <img> that displays us. If we open another document referencing the same SVGImage it
    // will display the document at a time where animations already ran - even though it has its own ImageBuffer.
    // We currently don't implement SVGSVGElement::setCurrentTime, and can NOT go back in time, once animations started.
    // There's no way to fix this besides avoiding style/attribute mutations from SVGAnimationElement.

Easy fixable today, as we have setCurrentTime support which is well-tested. I'm glad this can be resolved now.

[Philip Rogers]

(In reply to comment #1)
> Easy fixable today, as we have setCurrentTime support which is well-tested. I'm glad this can be resolved now.

If only it were so simple sometimes :P
https://bugs.webkit.org/show_bug.cgi?id=89846

[Nikolas Zimmermann]

(In reply to comment #2)
> (In reply to comment #1)
> > Easy fixable today, as we have setCurrentTime support which is well-tested. I'm glad this can be resolved now.
> 
> If only it were so simple sometimes :P
> https://bugs.webkit.org/show_bug.cgi?id=89846

Heh, I didn't claim it's bug free, but at least setCurrentTime exists now...
When I wrote the comment in SVGImage.cpp, it seemed like light-years away for us to support it, glad it changed :-)

[Brent Fulgham]

The relevant test site no longer exists. We can't take further action on this bug report.