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LibWeb: Resolve and paint simple SVG masks

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This allows applying SVG <mask>s to elements. It is only implemented for
the simplest (and default) case:

	- mask-type = luminance
 	- maskContentUnits = maskContentUnits
 	- maskUnits = objectBoundingBox
	- Default masking area

It should be possible to extend to cover more cases. Though the layout
for maskContentUnits = objectBoundingBox will be tricky to figure out.
This commit is contained in:
MacDue 2023-09-10 14:10:55 +01:00 • committed by Andreas Kling
parent 650180811e
commit 909bcfe9a4
12 changed files with 123 additions and 17 deletions
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15
Userland/Libraries/LibWeb/SVG/SVGGraphicsElement.h
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@ -46,6 +46,8 @@ public:
Optional<Gfx::PaintStyle const&> fill_paint_style(SVGPaintContext const&) const;
Optional<Gfx::PaintStyle const&> stroke_paint_style(SVGPaintContext const&) const;
JS::GCPtr<SVG::SVGMaskElement const> mask() const;
Optional<ViewBox> view_box() const;
protected:
@ -62,6 +64,19 @@ protected:
Gfx::AffineTransform m_transform = {};
template<typename T>
JS::GCPtr<T> try_resolve_url_to(AK::URL const& url) const
{
if (!url.fragment().has_value())
return {};
auto node = document().get_element_by_id(*url.fragment());
if (!node)
return {};
if (is<T>(*node))
return static_cast<T&>(*node);
return {};
}
private:
virtual bool is_svg_graphics_element() const final { return true; }
};