Bug 258225 – External SVG with filter does not render correctly

• Status: NEW
• Component: SVG

[Ahmad Saleem]

Hi Team,

This is bug copy of chrome bug 1429510 (crbug.com/1429510).

Test Case - In URL field

WPT Test Case - https://wpt.fyi/results/css/filter-effects/svg-external-filter-resource.html?label=experimental&label=master&aligned

WPT Test Case Live Link - http://wpt.live/css/filter-effects/svg-external-filter-resource.html

Blink Commit: https://chromium.googlesource.com/chromium/src/+/0c1c236384bdf19a251c0f72a424fbea2b044349

______

--> Expected Result (In Chrome Canary 116):

Show two green circle one with blur

--> Actual Result (in STP172 & Safari 16.5 & Firefox Nightly 116):

Show one green circle and missing blurred circle

_______

Just wanted to raise so we can track more failing cases and look into fixing them.

Thanks!

[Radar WebKit Bug Importer]

<rdar://problem/114823248>

[Ahmad Saleem]

Updating this return: https://searchfox.org/wubkat/source/Source/WebCore/svg/SVGLengthContext.cpp#233

and

still looking into what to about other stuff but have an idea but if someone wanna take it up. :-)

Haven't done any local testing.

[Ahmad Saleem]

Repaint issue in 'LBSE', it draws but don't change from 'brown' to 'green'.

[Ahmad Saleem]

This compiles but does not fix this bug:

```
static inline const RenderStyle* renderStyleForLengthResolving(const SVGElement* context)
{
    if (!context)
        return nullptr;

    const ContainerNode* currentContext = context;
    do {
        if (currentContext->renderer())
            return &currentContext->renderer()->style();
        currentContext = currentContext->parentNode();
    } while (currentContext);

    Document& document = context->document();
    
    // Don't return default style if document render tree is being destroyed
    if (document.renderTreeBeingDestroyed())
        return nullptr;
    
    return &RenderStyle::defaultStyleSingleton();
}
```