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/*
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGfx/AntiAliasingPainter.h>
#include <LibWeb/Layout/ImageBox.h>
#include <LibWeb/Painting/SVGGeometryPaintable.h>
#include <LibWeb/SVG/SVGSVGElement.h>
namespace Web::Painting {
JS::NonnullGCPtr<SVGGeometryPaintable> SVGGeometryPaintable::create(Layout::SVGGeometryBox const& layout_box)
{
return layout_box.heap().allocate_without_realm<SVGGeometryPaintable>(layout_box);
}
SVGGeometryPaintable::SVGGeometryPaintable(Layout::SVGGeometryBox const& layout_box)
: SVGGraphicsPaintable(layout_box)
{
}
Layout::SVGGeometryBox const& SVGGeometryPaintable::layout_box() const
{
return static_cast<Layout::SVGGeometryBox const&>(layout_node());
}
Optional<HitTestResult> SVGGeometryPaintable::hit_test(CSSPixelPoint position, HitTestType type) const
{
auto result = SVGGraphicsPaintable::hit_test(position, type);
if (!result.has_value())
return {};
auto& geometry_element = layout_box().dom_node();
if (auto transform = layout_box().layout_transform(); transform.has_value()) {
auto transformed_bounding_box = transform->map_to_quad(
const_cast<SVG::SVGGeometryElement&>(geometry_element).get_path().bounding_box());
if (!transformed_bounding_box.contains(position.to_type<double>().to_type<float>()))
return {};
}
return result;
}
void SVGGeometryPaintable::paint(PaintContext& context, PaintPhase phase) const
{
if (!is_visible())
return;
SVGGraphicsPaintable::paint(context, phase);
if (phase != PaintPhase::Foreground)
return;
auto& geometry_element = layout_box().dom_node();
Gfx::AntiAliasingPainter painter { context.painter() };
auto& svg_context = context.svg_context();
// FIXME: This should not be trucated to an int.
Gfx::PainterStateSaver save_painter { context.painter() };
auto offset = context.floored_device_point(svg_context.svg_element_position()).to_type<int>().to_type<float>();
painter.translate(offset);
auto const* svg_element = geometry_element.shadow_including_first_ancestor_of_type<SVG::SVGSVGElement>();
auto maybe_view_box = svg_element->view_box();
auto transform = layout_box().layout_transform();
if (!transform.has_value())
return;
auto css_scale = context.device_pixels_per_css_pixel();
auto paint_transform = Gfx::AffineTransform {}.scale(css_scale, css_scale).multiply(*transform);
auto const& original_path = const_cast<SVG::SVGGeometryElement&>(geometry_element).get_path();
Gfx::Path path = original_path.copy_transformed(paint_transform);
// Fills are computed as though all paths 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();
return copy;
};
// Note: This is assuming .x_scale() == .y_scale() (which it does currently).
auto viewbox_scale = paint_transform.x_scale();
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 { { 0, 0 }, svg_context.svg_element_size().to_type<double>().to_type<float>() };
}();
SVG::SVGPaintContext paint_context {
.viewport = svg_viewport,
.path_bounding_box = original_path.bounding_box(),
.transform = paint_transform
};
// FIXME: Apply fill opacity to paint styles?
auto fill_opacity = geometry_element.fill_opacity().value_or(svg_context.fill_opacity());
if (auto paint_style = geometry_element.fill_paint_style(paint_context); paint_style.has_value()) {
painter.fill_path(
closed_path(),
*paint_style,
Gfx::Painter::WindingRule::EvenOdd);
} else if (auto fill_color = geometry_element.fill_color().value_or(svg_context.fill_color()).with_opacity(fill_opacity); fill_color.alpha() > 0) {
painter.fill_path(
closed_path(),
fill_color,
Gfx::Painter::WindingRule::EvenOdd);
}
auto stroke_opacity = geometry_element.stroke_opacity().value_or(svg_context.stroke_opacity());
if (auto stroke_color = geometry_element.stroke_color().value_or(svg_context.stroke_color()).with_opacity(stroke_opacity); stroke_color.alpha() > 0) {
painter.stroke_path(
path,
stroke_color,
// Note: This is assuming .x_scale() == .y_scale() (which it does currently).
geometry_element.stroke_width().value_or(svg_context.stroke_width()) * viewbox_scale);
}
}
}
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