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163b6bb401
Rather than try to lay out masks normally, this updates the TreeBuilder to create layout nodes for masks as a child of their user (i.e. the masked element). This allows each use of a mask to be laid out differently, which makes supporting `maskContentUnits=objectBoundingBox` fairly easy. The `SVGFormattingContext` is then updated to lay out masks last (as their sizing may depend on their parent), and treats them like viewports. This is pretty ad-hoc, but the SVG specification does not give any guidance on how to actually implement this.
72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/Layout/SVGGraphicsBox.h>
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#include <LibWeb/Painting/SVGPaintable.h>
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namespace Web::Painting {
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class SVGGraphicsPaintable : public SVGPaintable {
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JS_CELL(SVGGraphicsPaintable, SVGPaintable);
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public:
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class ComputedTransforms {
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public:
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ComputedTransforms(Gfx::AffineTransform svg_to_viewbox_transform, Gfx::AffineTransform svg_transform)
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: m_svg_to_viewbox_transform(svg_to_viewbox_transform)
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, m_svg_transform(svg_transform)
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{
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}
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ComputedTransforms() = default;
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Gfx::AffineTransform const& svg_to_viewbox_transform() const { return m_svg_to_viewbox_transform; }
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Gfx::AffineTransform const& svg_transform() const { return m_svg_transform; }
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Gfx::AffineTransform svg_to_css_pixels_transform(
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Optional<Gfx::AffineTransform const&> additional_svg_transform = {}) const
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{
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return Gfx::AffineTransform {}.multiply(svg_to_viewbox_transform()).multiply(additional_svg_transform.value_or(Gfx::AffineTransform {})).multiply(svg_transform());
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}
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Gfx::AffineTransform svg_to_device_pixels_transform(PaintContext const& context) const
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{
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auto css_scale = context.device_pixels_per_css_pixel();
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return Gfx::AffineTransform {}.scale({ css_scale, css_scale }).multiply(svg_to_css_pixels_transform(context.svg_transform()));
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}
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private:
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Gfx::AffineTransform m_svg_to_viewbox_transform {};
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Gfx::AffineTransform m_svg_transform {};
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};
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static JS::NonnullGCPtr<SVGGraphicsPaintable> create(Layout::SVGGraphicsBox const&);
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Layout::SVGGraphicsBox const& layout_box() const;
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virtual Optional<CSSPixelRect> get_masking_area() const override;
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virtual Optional<Gfx::Bitmap::MaskKind> get_mask_type() const override;
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virtual RefPtr<Gfx::Bitmap> calculate_mask(PaintContext&, CSSPixelRect const& masking_area) const override;
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void set_computed_transforms(ComputedTransforms computed_transforms)
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{
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m_computed_transforms = computed_transforms;
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}
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ComputedTransforms const& computed_transforms() const
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{
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return m_computed_transforms;
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}
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protected:
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SVGGraphicsPaintable(Layout::SVGGraphicsBox const&);
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ComputedTransforms m_computed_transforms;
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};
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}
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