Backdrop filter is pulling in content from behind the window.

[zalan]

Backdrop filter is sized to the parent layer as opposed to the renderer's size.

[zalan]

rdar://problem/20909309

[zalan]

Created attachment 254084 [details]
Patch

[Simon Fraser (smfr)]

Comment on attachment 254084 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=254084&action=review

> Source/WebCore/platform/graphics/ca/GraphicsLayerCA.cpp:1885
> +    FloatRect contentBounds(0, 0, m_backdropFiltersRect.width(), m_backdropFiltersRect.height());
> +    m_backdropLayer->setBounds(contentBounds);

This could be m_backdropLayer->setBounds(FloatRect(FloatPoint(), m_backdropFiltersRect.size());

I kinda wish we had FloatRect(FloatSize) for this.

[zalan]

Created attachment 254094 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 254094 [details]
Patch

Clearing flags on attachment: 254094

Committed r185124: <http://trac.webkit.org/changeset/185124>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Brent Fulgham]

This change broke certain compositing features on Windows, primarily the ability to see the debug borders.