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LibWeb: Save "background-clip: text" mask as a nested display list

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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.
This commit is contained in:
Aliaksandr Kalenik
2024-07-24 22:03:19 +03:00
committed by Andreas Kling
parent 50ab5642cc
commit 67d68eac64
17 changed files with 102 additions and 102 deletions
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2
Userland/Libraries/LibWeb/CSS/StyleValues/AbstractImageStyleValue.h
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@@ -36,7 +36,7 @@ public:
virtual void resolve_for_size(Layout::NodeWithStyleAndBoxModelMetrics const&, CSSPixelSize) const {};
virtual bool is_paintable() const = 0;
virtual void paint(PaintContext& context, DevicePixelRect const& dest_rect, ImageRendering, Vector<Gfx::Path> const& clip_paths = {}) const = 0;
virtual void paint(PaintContext& context, DevicePixelRect const& dest_rect, ImageRendering, RefPtr<Painting::DisplayList> text_clip = {}) const = 0;
virtual Optional<Gfx::Color> color_if_single_pixel_bitmap() const { return {}; }
};