537f289c0c
Prep for moving display-list rasterization out of LibWeb by moving the device-pixel corner radius, corner clip, and anti-aliasing types to LibGfx. Keep BorderRadiiData in LibWeb as the CSS-pixel representation and convert it to Gfx corner radii when recording display-list commands.
82 lines
3 KiB
C++
82 lines
3 KiB
C++
/*
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* Copyright (c) 2018-2022, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/BoundingBox.h>
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#include <LibWeb/Layout/ImageBox.h>
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#include <LibWeb/Layout/SVGSVGBox.h>
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#include <LibWeb/Painting/DisplayListRecorder.h>
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#include <LibWeb/Painting/SVGPaintable.h>
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#include <LibWeb/SVG/SVGMaskElement.h>
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namespace Web::Painting {
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SVGPaintable::SVGPaintable(Layout::SVGBox const& layout_box)
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: PaintableBox(layout_box)
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{
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}
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Layout::SVGBox const& SVGPaintable::layout_box() const
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{
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return static_cast<Layout::SVGBox const&>(layout_node());
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}
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// https://drafts.csswg.org/css-masking-1/#ClipPathElement
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bool SVGPaintable::contributes_to_clip_path() const
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{
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// If a child element is made invisible by display or visibility it does not contribute to the clipping path.
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return computed_values().visibility() == CSS::Visibility::Visible && !display().is_none();
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}
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// https://drafts.csswg.org/css-masking-1/#ClipPathElement
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Optional<CSSPixelRect> SVGPaintable::clip_path_geometry_bounds(Gfx::AffineTransform const& additional_transform) const
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{
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if (!contributes_to_clip_path())
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return {};
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// When the clipPath element contains multiple child elements, the silhouettes of the child elements are
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// logically OR'd together to create a single silhouette which is then used to restrict the region onto
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// which paint can be applied. Thus, a point is inside the clipping path if it is inside any of the
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// children of the clipPath.
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Gfx::BoundingBox<CSSPixels> bounding_box;
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for_each_child_of_type<PaintableBox>([&](PaintableBox& child) {
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auto const* svg_paintable = as_if<SVGPaintable>(child);
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if (!svg_paintable)
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return IterationDecision::Continue;
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auto child_bounds = svg_paintable->clip_path_geometry_bounds(additional_transform);
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if (!child_bounds.has_value())
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return IterationDecision::Continue;
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bounding_box.add_point(child_bounds->left(), child_bounds->top());
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bounding_box.add_point(child_bounds->right(), child_bounds->bottom());
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return IterationDecision::Continue;
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});
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if (bounding_box.has_no_points())
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return {};
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return bounding_box.to_rect();
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}
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CSSPixelRect SVGPaintable::compute_absolute_rect() const
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{
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if (auto* svg_svg_box = layout_box().first_ancestor_of_type<Layout::SVGSVGBox>()) {
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CSSPixelRect rect { offset(), content_size() };
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for (Layout::Box const* ancestor = svg_svg_box; ancestor; ancestor = ancestor->containing_block())
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rect.translate_by(ancestor->paintable_box()->offset());
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return rect;
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}
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return PaintableBox::compute_absolute_rect();
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}
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Gfx::ShouldAntiAlias SVGPaintable::should_anti_alias() const
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{
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auto shape_rendering = computed_values().shape_rendering();
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if (first_is_one_of(shape_rendering, CSS::ShapeRendering::Optimizespeed, CSS::ShapeRendering::Crispedges))
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return Gfx::ShouldAntiAlias::No;
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return Gfx::ShouldAntiAlias::Yes;
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}
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}
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