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LibWeb: Store calculated transformation matrix on the StackingContext

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This is mainly so we can easily read that matrix later, but also has the
benefit of only calculating the matrix once, instead of every time we
paint. :^)
This commit is contained in:
Sam Atkins 2022-07-19 15:18:20 +01:00 • committed by Andreas Kling
parent 01a3f72d39
commit 75e0b21940
2 changed files with 11 additions and 8 deletions
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5
Userland/Libraries/LibWeb/Painting/StackingContext.h
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@ -34,19 +34,22 @@ public:
void paint(PaintContext&) const;
Optional<HitTestResult> hit_test(Gfx::FloatPoint const&, HitTestType) const;
Gfx::FloatMatrix4x4 const& transform_matrix() const { return m_transform; }
Gfx::AffineTransform affine_transform_matrix() const;
void dump(int indent = 0) const;
void sort();
private:
Layout::Box& m_box;
Gfx::FloatMatrix4x4 m_transform;
StackingContext* const m_parent { nullptr };
Vector<StackingContext*> m_children;
void paint_internal(PaintContext&) const;
Gfx::FloatMatrix4x4 get_transformation_matrix(CSS::Transformation const& transformation) const;
Gfx::FloatMatrix4x4 combine_transformations(Vector<CSS::Transformation> const& transformations) const;
Gfx::AffineTransform combine_transformations_2d(Vector<CSS::Transformation> const& transformations) const;
Gfx::FloatPoint transform_origin() const;
};