809c15d1ee
This is needed for hit testing the directional arrows on the Street View office tour, and generally makes SVG hit testing more precise. Note: The rough bounding box is hit test first, so this should not be a load more overhead.
95 lines
3.5 KiB
C++
95 lines
3.5 KiB
C++
/*
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* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
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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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Optional<HitTestResult> SVGGeometryPaintable::hit_test(CSSPixelPoint position, HitTestType type) const
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{
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auto result = SVGGraphicsPaintable::hit_test(position, type);
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if (!result.has_value())
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return {};
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auto& geometry_element = layout_box().dom_node();
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auto transformed_bounding_box = layout_box().layout_transform().map_to_quad(
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const_cast<SVG::SVGGeometryElement&>(geometry_element).get_path().bounding_box());
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if (!transformed_bounding_box.contains(position.to_type<float>()))
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return {};
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return result;
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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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// FIXME: This should not be trucated to an int.
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auto offset = context.floored_device_point(svg_context.svg_element_position()).to_type<int>().to_type<float>();
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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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auto css_scale = context.device_pixels_per_css_pixel();
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Gfx::Path path = const_cast<SVG::SVGGeometryElement&>(geometry_element).get_path().copy_transformed(Gfx::AffineTransform {}.scale(css_scale, css_scale).multiply(layout_box().layout_transform()));
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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()) * context.device_pixels_per_css_pixel());
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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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