donner::svg::components::ComputedPathComponent Struct Reference

Stores a Path used for rendering a shape, which may be generated from the parameters of shapes such as circle, rect, line, poly, and path. More...

#include "donner/svg/components/shape/ComputedPathComponent.h"

Collaboration diagram for donner::svg::components::ComputedPathComponent:

Public Member Functions
Box2d	localBounds () const
	Returns the tight fill bounds of the path in local (pre-transform) space.
Box2d	transformedBounds (const Transform2d &pathFromTarget)
	Returns the tight bounds of the shape, transformed to the target coordinate system.

Public Attributes
Path	spline
	Path used for rendering the shape.
std::optional< Box2d >	cachedLocalBounds
	Lazily-populated cache for localBounds(). Left as a public data member (rather than hidden behind a private: section) so the component stays an aggregate — entt's emplace_or_replace<T>(args...) path initializes components via aggregate initialization on older compilers and breaks once a non-public section is added.

Detailed Description

Stores a Path used for rendering a shape, which may be generated from the parameters of shapes such as circle, rect, line, poly, and path.

All shapes create computed paths, and these paths can be rendered using a unified rendering pipeline.

Member Function Documentation

localBounds()

Box2d donner::svg::components::ComputedPathComponent::localBounds ( ) const

inline

Returns the tight fill bounds of the path in local (pre-transform) space.

Memoized — Path::bounds() walks every command (O(N) in path size), so hot-path callers (culling, hit-testing, filter-region computation) should prefer this accessor. The cache is tied to the ComputedPathComponent's lifetime; ShapeSystem rebuilds the component whenever the underlying geometry changes, which invalidates the cache. Style-only changes (fill color, opacity, stroke-width) leave the component — and the cached bounds — intact.

transformedBounds()

Box2d donner::svg::components::ComputedPathComponent::transformedBounds ( const Transform2d & pathFromTarget )

inline

Returns the tight bounds of the shape, transformed to the target coordinate system.

Parameters

pathFromTarget

Transform to transform the path to the target coordinate system.

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The documentation for this struct was generated from the following file:

• donner/svg/components/shape/ComputedPathComponent.h