ladybird/Userland/Libraries/LibWeb/Painting/SVGPaintable.cpp
MacDue 909bcfe9a4 LibWeb: Resolve and paint simple SVG masks
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.
2023-09-19 10:46:05 +02:00

35 lines
1,016 B
C++

/*
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Layout/ImageBox.h>
#include <LibWeb/Layout/SVGSVGBox.h>
#include <LibWeb/Painting/SVGPaintable.h>
#include <LibWeb/SVG/SVGMaskElement.h>
namespace Web::Painting {
SVGPaintable::SVGPaintable(Layout::SVGBox const& layout_box)
: PaintableBox(layout_box)
{
}
Layout::SVGBox const& SVGPaintable::layout_box() const
{
return static_cast<Layout::SVGBox const&>(layout_node());
}
CSSPixelRect SVGPaintable::compute_absolute_rect() const
{
if (auto* svg_svg_box = layout_box().first_ancestor_of_type<Layout::SVGSVGBox>()) {
CSSPixelRect rect { offset(), content_size() };
for (Layout::Box const* ancestor = svg_svg_box; ancestor && ancestor->paintable(); ancestor = ancestor->paintable()->containing_block())
rect.translate_by(ancestor->paintable_box()->offset());
return rect;
}
return PaintableBox::compute_absolute_rect();
}
}