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https://github.com/LadybirdBrowser/ladybird
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d4feeb1cad
Reuse existing paintables during relayout to reduce GC allocation pressure. Each paintable subclass implements reset_for_relayout() to clear state before reuse.
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
/*
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* Copyright (c) 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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#pragma once
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#include <LibWeb/Layout/ImageBox.h>
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#include <LibWeb/Layout/SVGImageBox.h>
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#include <LibWeb/Painting/PaintableBox.h>
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namespace Web::Painting {
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class ImagePaintable final
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: public PaintableBox
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, public DOM::Document::ViewportClient {
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GC_CELL(ImagePaintable, PaintableBox);
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GC_DECLARE_ALLOCATOR(ImagePaintable);
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public:
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static constexpr bool OVERRIDES_FINALIZE = true;
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static GC::Ref<ImagePaintable> create(Layout::ImageBox const& layout_box);
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static GC::Ref<ImagePaintable> create(Layout::SVGImageBox const& layout_box);
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virtual void paint(DisplayListRecordingContext&, PaintPhase) const override;
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virtual void reset_for_relayout() override;
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private:
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// ^JS::Cell
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virtual void visit_edges(Visitor&) override;
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virtual void finalize() override;
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// ^Document::ViewportClient
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virtual void did_set_viewport_rect(CSSPixelRect const&) final;
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ImagePaintable(Layout::Box const& layout_box, Layout::ImageProvider const& image_provider, bool renders_as_alt_text, String alt_text, bool is_svg_image);
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bool m_renders_as_alt_text { false };
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String m_alt_text;
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Layout::ImageProvider const& m_image_provider;
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bool m_is_svg_image { false };
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};
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}
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