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LibWeb: Support CSS property background-clip: text

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From https://drafts.csswg.org/css-backgrounds-4/#background-clip
"The background is painted within (clipped to) the intersection of the
border box and the geometry of the text in the element and its in-flow
and floated descendants"

This change implements it in the following way:
1. Traverse the descendants of the element, collecting the Gfx::Path of
   glyphs into a vector.
2. The vector of collected paths is saved in the background painting
   command.
3. The painting commands executor uses the list of glyphs to paint a
   mask for background clipping.

Co-authored-by: Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
This commit is contained in:
Zac Brannelly 2024-03-03 14:59:02 +11:00 • committed by Alexander Kalenik
parent 4a3680cafc
commit 9165faca5e
27 changed files with 353 additions and 105 deletions
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2
Userland/Libraries/LibWeb/Painting/BackgroundPainting.h
View file

@ -12,6 +12,6 @@
namespace Web::Painting {
void paint_background(PaintContext&, Layout::NodeWithStyleAndBoxModelMetrics const&, CSSPixelRect const&, Color background_color, CSS::ImageRendering, Vector<CSS::BackgroundLayerData> const*, BorderRadiiData const&);
void paint_background(PaintContext&, Layout::NodeWithStyleAndBoxModelMetrics const&, CSSPixelRect const&, Color background_color, CSS::ImageRendering, Vector<CSS::BackgroundLayerData> const*, BorderRadiiData const&, Vector<Gfx::Path> const& clip_paths = {});
}