Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/Painting/SVGPathPaintable.cpp

@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2018-2022, Andreas Kling <andreas@ladybird.org>
+ * Copyright (c) 2023, MacDue <macdue@dueutil.tech>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibGfx/AntiAliasingPainter.h>
+#include <LibWeb/Painting/SVGPathPaintable.h>
+#include <LibWeb/Painting/SVGSVGPaintable.h>
+
+namespace Web::Painting {
+
+JS_DEFINE_ALLOCATOR(SVGPathPaintable);
+
+JS::NonnullGCPtr<SVGPathPaintable> SVGPathPaintable::create(Layout::SVGGraphicsBox const& layout_box)
+{
+    return layout_box.heap().allocate_without_realm<SVGPathPaintable>(layout_box);
+}
+
+SVGPathPaintable::SVGPathPaintable(Layout::SVGGraphicsBox const& layout_box)
+    : SVGGraphicsPaintable(layout_box)
+{
+}
+
+Layout::SVGGraphicsBox const& SVGPathPaintable::layout_box() const
+{
+    return static_cast<Layout::SVGGraphicsBox const&>(layout_node());
+}
+
+TraversalDecision SVGPathPaintable::hit_test(CSSPixelPoint position, HitTestType type, Function<TraversalDecision(HitTestResult)> const& callback) const
+{
+    if (!computed_path().has_value())
+        return TraversalDecision::Continue;
+    auto transformed_bounding_box = computed_transforms().svg_to_css_pixels_transform().map_to_quad(computed_path()->bounding_box());
+    if (!transformed_bounding_box.contains(position.to_type<float>()))
+        return TraversalDecision::Continue;
+    return SVGGraphicsPaintable::hit_test(position, type, callback);
+}
+
+static Gfx::WindingRule to_gfx_winding_rule(SVG::FillRule fill_rule)
+{
+    switch (fill_rule) {
+    case SVG::FillRule::Nonzero:
+        return Gfx::WindingRule::Nonzero;
+    case SVG::FillRule::Evenodd:
+        return Gfx::WindingRule::EvenOdd;
+    default:
+        VERIFY_NOT_REACHED();
+    }
+}
+
+void SVGPathPaintable::paint(PaintContext& context, PaintPhase phase) const
+{
+    if (!is_visible() || !computed_path().has_value())
+        return;
+
+    SVGGraphicsPaintable::paint(context, phase);
+
+    if (phase != PaintPhase::Foreground)
+        return;
+
+    auto& graphics_element = layout_box().dom_node();
+
+    auto const* svg_node = layout_box().first_ancestor_of_type<Layout::SVGSVGBox>();
+    auto svg_element_rect = svg_node->paintable_box()->absolute_rect();
+
+    DisplayListRecorderStateSaver save_painter { context.display_list_recorder() };
+
+    auto offset = context.rounded_device_point(svg_element_rect.location()).to_type<int>().to_type<float>();
+    auto maybe_view_box = svg_node->dom_node().view_box();
+
+    auto paint_transform = computed_transforms().svg_to_device_pixels_transform(context);
+    auto path = computed_path()->copy_transformed(paint_transform);
+
+    // Fills are computed as though all subpaths are closed (https://svgwg.org/svg2-draft/painting.html#FillProperties)
+    auto closed_path = [&] {
+        // We need to fill the path before applying the stroke, however the filled
+        // path must be closed, whereas the stroke path may not necessary be closed.
+        // Copy the path and close it for filling, but use the previous path for stroke
+        auto copy = path;
+        copy.close_all_subpaths();
+        return copy;
+    };
+
+    auto svg_viewport = [&] {
+        if (maybe_view_box.has_value())
+            return Gfx::FloatRect { maybe_view_box->min_x, maybe_view_box->min_y, maybe_view_box->width, maybe_view_box->height };
+        return Gfx::FloatRect { {}, svg_element_rect.size().to_type<float>() };
+    }();
+
+    if (context.draw_svg_geometry_for_clip_path()) {
+        // https://drafts.fxtf.org/css-masking/#ClipPathElement:
+        // The raw geometry of each child element exclusive of rendering properties such as fill, stroke, stroke-width
+        // within a clipPath conceptually defines a 1-bit mask (with the possible exception of anti-aliasing along
+        // the edge of the geometry) which represents the silhouette of the graphics associated with that element.
+        context.display_list_recorder().fill_path({
+            .path = closed_path(),
+            .color = Color::Black,
+            .winding_rule = to_gfx_winding_rule(graphics_element.clip_rule().value_or(SVG::ClipRule::Nonzero)),
+            .translation = offset,
+        });
+        return;
+    }
+
+    SVG::SVGPaintContext paint_context {
+        .viewport = svg_viewport,
+        .path_bounding_box = computed_path()->bounding_box(),
+    };
+
+    auto fill_opacity = graphics_element.fill_opacity().value_or(1);
+    auto winding_rule = to_gfx_winding_rule(graphics_element.fill_rule().value_or(SVG::FillRule::Nonzero));
+    if (auto paint_style = graphics_element.fill_paint_style(paint_context); paint_style.has_value()) {
+        context.display_list_recorder().fill_path({
+            .path = closed_path(),
+            .paint_style = *paint_style,
+            .winding_rule = winding_rule,
+            .opacity = fill_opacity,
+            .translation = offset,
+        });
+    } else if (auto fill_color = graphics_element.fill_color(); fill_color.has_value()) {
+        context.display_list_recorder().fill_path({
+            .path = closed_path(),
+            .color = fill_color->with_opacity(fill_opacity),
+            .winding_rule = winding_rule,
+            .translation = offset,
+        });
+    }
+
+    auto stroke_linecap = graphics_element.stroke_linecap().value_or(CSS::StrokeLinecap::Butt);
+    (void)stroke_linecap; // FIXME: Use
+
+    auto stroke_opacity = graphics_element.stroke_opacity().value_or(1);
+
+    // Note: This is assuming .x_scale() == .y_scale() (which it does currently).
+    auto viewbox_scale = paint_transform.x_scale();
+    float stroke_thickness = graphics_element.stroke_width().value_or(1) * viewbox_scale;
+
+    if (auto paint_style = graphics_element.stroke_paint_style(paint_context); paint_style.has_value()) {
+        context.display_list_recorder().stroke_path({
+            .path = path,
+            .paint_style = *paint_style,
+            .thickness = stroke_thickness,
+            .opacity = stroke_opacity,
+            .translation = offset,
+        });
+    } else if (auto stroke_color = graphics_element.stroke_color(); stroke_color.has_value()) {
+        context.display_list_recorder().stroke_path({
+            .path = path,
+            .color = stroke_color->with_opacity(stroke_opacity),
+            .thickness = stroke_thickness,
+            .translation = offset,
+        });
+    }
+}
+
+}