mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 14:22:43 +00:00
4d401bf796
This simplifies the ownership model between DOM/layout/paint nodes immensely by deferring to the garbage collector for figuring out what's live and what's not.
122 lines
4.7 KiB
C++
122 lines
4.7 KiB
C++
/*
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* Copyright (c) 2018-2022, 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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#include <LibGfx/AntiAliasingPainter.h>
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#include <LibWeb/Layout/ImageBox.h>
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#include <LibWeb/Painting/SVGGeometryPaintable.h>
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#include <LibWeb/SVG/SVGSVGElement.h>
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namespace Web::Painting {
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JS::NonnullGCPtr<SVGGeometryPaintable> SVGGeometryPaintable::create(Layout::SVGGeometryBox const& layout_box)
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{
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return layout_box.heap().allocate_without_realm<SVGGeometryPaintable>(layout_box);
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}
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SVGGeometryPaintable::SVGGeometryPaintable(Layout::SVGGeometryBox const& layout_box)
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: SVGGraphicsPaintable(layout_box)
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{
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}
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Layout::SVGGeometryBox const& SVGGeometryPaintable::layout_box() const
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{
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return static_cast<Layout::SVGGeometryBox const&>(layout_node());
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}
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void SVGGeometryPaintable::paint(PaintContext& context, PaintPhase phase) const
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{
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if (!is_visible())
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return;
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SVGGraphicsPaintable::paint(context, phase);
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if (phase != PaintPhase::Foreground)
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return;
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auto& geometry_element = layout_box().dom_node();
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Gfx::AntiAliasingPainter painter { context.painter() };
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auto& svg_context = context.svg_context();
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auto offset = svg_context.svg_element_position();
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painter.translate(offset);
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auto const* svg_element = geometry_element.first_ancestor_of_type<SVG::SVGSVGElement>();
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auto maybe_view_box = svg_element->view_box();
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context.painter().add_clip_rect(context.enclosing_device_rect(absolute_rect()).to_type<int>());
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Gfx::Path path = const_cast<SVG::SVGGeometryElement&>(geometry_element).get_path();
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if (maybe_view_box.has_value()) {
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Gfx::Path new_path;
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auto scaling = layout_box().viewbox_scaling();
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auto origin = layout_box().viewbox_origin();
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auto transform_point = [&scaling, &origin](Gfx::FloatPoint point) -> Gfx::FloatPoint {
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auto new_point = point;
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new_point.translate_by({ -origin.x(), -origin.y() });
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new_point.scale_by(scaling);
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return new_point;
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};
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for (auto& segment : path.segments()) {
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switch (segment.type()) {
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case Gfx::Segment::Type::Invalid:
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break;
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case Gfx::Segment::Type::MoveTo:
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new_path.move_to(transform_point(segment.point()));
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break;
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case Gfx::Segment::Type::LineTo:
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new_path.line_to(transform_point(segment.point()));
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break;
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case Gfx::Segment::Type::QuadraticBezierCurveTo: {
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auto& quadratic_bezier_segment = static_cast<Gfx::QuadraticBezierCurveSegment const&>(segment);
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new_path.quadratic_bezier_curve_to(transform_point(quadratic_bezier_segment.through()), transform_point(quadratic_bezier_segment.point()));
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break;
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}
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case Gfx::Segment::Type::CubicBezierCurveTo: {
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auto& cubic_bezier_segment = static_cast<Gfx::CubicBezierCurveSegment const&>(segment);
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new_path.cubic_bezier_curve_to(transform_point(cubic_bezier_segment.through_0()), transform_point(cubic_bezier_segment.through_1()), transform_point(cubic_bezier_segment.point()));
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break;
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}
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case Gfx::Segment::Type::EllipticalArcTo: {
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auto& elliptical_arc_segment = static_cast<Gfx::EllipticalArcSegment const&>(segment);
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new_path.elliptical_arc_to(transform_point(elliptical_arc_segment.point()), elliptical_arc_segment.radii().scaled(scaling, scaling), elliptical_arc_segment.x_axis_rotation(), elliptical_arc_segment.large_arc(), elliptical_arc_segment.sweep());
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break;
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}
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}
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}
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path = new_path;
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}
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if (auto fill_color = geometry_element.fill_color().value_or(svg_context.fill_color()); fill_color.alpha() > 0) {
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// We need to fill the path before applying the stroke, however the filled
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// path must be closed, whereas the stroke path may not necessary be closed.
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// Copy the path and close it for filling, but use the previous path for stroke
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auto closed_path = path;
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closed_path.close();
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// Fills are computed as though all paths are closed (https://svgwg.org/svg2-draft/painting.html#FillProperties)
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painter.fill_path(
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closed_path,
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fill_color,
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Gfx::Painter::WindingRule::EvenOdd);
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}
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if (auto stroke_color = geometry_element.stroke_color().value_or(svg_context.stroke_color()); stroke_color.alpha() > 0) {
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painter.stroke_path(
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path,
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stroke_color,
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geometry_element.stroke_width().value_or(svg_context.stroke_width()));
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}
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painter.translate(-offset);
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context.painter().clear_clip_rect();
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}
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}
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