67d68eac64
Before this change, "background-clip: text" was implemented by saving a Vector<Gfx::Path> of all glyphs needed to paint a mask for the background. The issue with this approach was that once glyphs were extracted into vector paths, the glyph rasterization cache could no longer be utilized. With this change, all text required for mask painting is saved in a nested display list and rasterized as a regular text.
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
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* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2022-2023, 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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#pragma once
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#include <LibJS/Heap/Cell.h>
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#include <LibJS/Heap/Handle.h>
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#include <LibURL/URL.h>
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#include <LibWeb/CSS/Enums.h>
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#include <LibWeb/CSS/StyleValues/AbstractImageStyleValue.h>
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#include <LibWeb/HTML/SharedImageRequest.h>
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namespace Web::CSS {
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class ImageStyleValue final
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: public AbstractImageStyleValue
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, public Weakable<ImageStyleValue> {
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public:
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static ValueComparingNonnullRefPtr<ImageStyleValue> create(URL::URL const& url)
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{
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return adopt_ref(*new (nothrow) ImageStyleValue(url));
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}
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virtual ~ImageStyleValue() override;
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void visit_edges(JS::Cell::Visitor& visitor) const
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{
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// FIXME: visit_edges in non-GC allocated classes is confusing pattern.
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// Consider making StyleValue to be GC allocated instead.
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visitor.visit(m_image_request);
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}
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virtual String to_string() const override;
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virtual bool equals(StyleValue const& other) const override;
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virtual void load_any_resources(DOM::Document&) override;
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Optional<CSSPixels> natural_width() const override;
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Optional<CSSPixels> natural_height() const override;
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Optional<CSSPixelFraction> natural_aspect_ratio() const override;
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virtual bool is_paintable() const override;
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void paint(PaintContext& context, DevicePixelRect const& dest_rect, CSS::ImageRendering image_rendering, RefPtr<Painting::DisplayList> clip_paths = {}) const override;
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virtual Optional<Gfx::Color> color_if_single_pixel_bitmap() const override;
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Gfx::ImmutableBitmap const* current_frame_bitmap(DevicePixelRect const& dest_rect) const;
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Function<void()> on_animate;
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JS::GCPtr<HTML::DecodedImageData> image_data() const;
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private:
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ImageStyleValue(URL::URL const&);
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JS::GCPtr<HTML::SharedImageRequest> m_image_request;
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void animate();
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Gfx::ImmutableBitmap const* bitmap(size_t frame_index, Gfx::IntSize = {}) const;
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URL::URL m_url;
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WeakPtr<DOM::Document> m_document;
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size_t m_current_frame_index { 0 };
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size_t m_loops_completed { 0 };
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RefPtr<Platform::Timer> m_timer;
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};
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}
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