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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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4
Userland/Libraries/LibWeb/CSS/StyleValues/ConicGradientStyleValue.cpp
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@ -42,10 +42,10 @@ void ConicGradientStyleValue::resolve_for_size(Layout::NodeWithStyleAndBoxModelM
m_resolved->position = m_properties.position->resolved(node, CSSPixelRect { { 0, 0 }, size });
}
void ConicGradientStyleValue::paint(PaintContext& context, DevicePixelRect const& dest_rect, CSS::ImageRendering) const
void ConicGradientStyleValue::paint(PaintContext& context, DevicePixelRect const& dest_rect, CSS::ImageRendering, Vector<Gfx::Path> const& clip_paths) const
{
VERIFY(m_resolved.has_value());
Painting::paint_conic_gradient(context, dest_rect, m_resolved->data, context.rounded_device_point(m_resolved->position));
Painting::paint_conic_gradient(context, dest_rect, m_resolved->data, context.rounded_device_point(m_resolved->position), clip_paths);
}
bool ConicGradientStyleValue::equals(StyleValue const& other) const