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LibWeb: Add ScopedCornerRadiusClip

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This a simple RAII helper for the BorderRadiusCornerClipper it
samples under the corners on construction, then blits them back
on exiting the scope. This encapsulates a fairly common pattern.
This commit is contained in:
MacDue 2022-07-04 21:04:10 +01:00 • committed by Andreas Kling
parent f283e0ddc5
commit b7fd844c9d
Notes: sideshowbarker 2024-07-17 09:43:01 +09:00
1 changed files with 28 additions and 0 deletions

28
Userland/Libraries/LibWeb/Painting/BorderRadiusCornerClipper.h
View file

@ -60,4 +60,32 @@ private:
}
};
struct ScopedCornerRadiusClip {
ScopedCornerRadiusClip(Gfx::Painter& painter, Gfx::IntRect const& border_rect, BorderRadiiData const& border_radii, CornerClip corner_clip = CornerClip::Outside, BorderRadiusCornerClipper::UseCachedBitmap use_cached_bitmap = BorderRadiusCornerClipper::UseCachedBitmap::Yes)
: m_painter(painter)
{
if (border_radii.has_any_radius()) {
auto clipper = BorderRadiusCornerClipper::create(border_rect, border_radii, corner_clip, use_cached_bitmap);
if (!clipper.is_error()) {
m_corner_clipper = clipper.release_value();
m_corner_clipper->sample_under_corners(m_painter);
}
}
}
~ScopedCornerRadiusClip()
{
if (m_corner_clipper.has_value()) {
m_corner_clipper->blit_corner_clipping(m_painter);
}
}
AK_MAKE_NONMOVABLE(ScopedCornerRadiusClip);
AK_MAKE_NONCOPYABLE(ScopedCornerRadiusClip);
private:
Gfx::Painter& m_painter;
Optional<BorderRadiusCornerClipper> m_corner_clipper;
};
}