Bug 97223 – Images not loading when the SVG document is embedded via <img>

• Component: SVG
• Status: RESOLVED DUPLICATE

[Florin Malita]

Created attachment 164928 [details]
PNG image (green rect) not loaded

When embedding SVG content via SVGImage, SVGImageElements are not loaded.

Chromium issue: http://code.google.com/p/chromium/issues/detail?id=149180

[Florin Malita]

Seems to be caused by the SVGImage resource loader not having autoLoadImages set (because the page settings are default-initialized). I believe it's safe to enable it. 

There is a warning in SVGImage::dataChanged() regarding self-referencing SVGImages:

        // FIXME: If this SVG ends up loading itself, we might leak the world.
        // The Cache code does not know about CachedImages holding Frames and
        // won't know to break the cycle.
        // This will become an issue when SVGImage will be able to load other
        // SVGImage objects, but we're safe now, because SVGImage can only be
        // loaded by a top-level document.

Some quick testing indicates that even with autoLoadImages enabled, the above still holds: because the SVGImage document doesn't have a baseURL, any attempt to resolve the URL for nested SVGImages returns "", effectively limiting the recursion to one level. We can always add a test to catch any future breakage in this area.

[Florin Malita]

Unfortunately, things are not quite as simple for non-Chromium platforms because they require a valid networking context/frame loader client (which SVGImage::dataChanged does not provide). So flipping the auto load bit is not enough...

[Alexey Proskuryakov]

*** This bug has been marked as a duplicate of bug 15443 ***