| Flutter Impeller |

Public Member Functions | List of all members
impeller::FillPathGeometry Class Referencefinal

A geometry that is created from a filled path object. More...

`#include <fill_path_geometry.h>`

Inheritance diagram for impeller::FillPathGeometry:

## Public Member Functions
| FillPathGeometry (const Path &path, std::optional< Rect > inner_rect=std::nullopt)
| ~FillPathGeometry () override
bool | CoversArea (const Matrix &transform, const Rect &rect) const override
| Determines if this geometry, transformed by the given `transform`, will completely cover all surface area of the given `rect`. More...
Public Member Functions inherited from impeller::Geometry
virtual | ~Geometry ()
virtual bool | IsAxisAlignedRect () const
virtual bool | CanApplyMaskFilter () const
virtual Scalar | ComputeAlphaCoverage (const Matrix &transform) const

## Additional Inherited Members
Static Public Member Functions inherited from impeller::Geometry
static std::unique_ptr< Geometry > | MakeFillPath (const Path &path, std::optional< Rect > inner_rect=std::nullopt)
static std::unique_ptr< Geometry > | MakeStrokePath (const Path &path, Scalar stroke_width=0.0, Scalar miter_limit=4.0, Cap stroke_cap=Cap::kButt, Join stroke_join=Join::kMiter)
static std::unique_ptr< Geometry > | MakeCover ()
static std::unique_ptr< Geometry > | MakeRect (const Rect &rect)
static std::unique_ptr< Geometry > | MakeOval (const Rect &rect)
static std::unique_ptr< Geometry > | MakeLine (const Point &p0, const Point &p1, Scalar width, Cap cap)
static std::unique_ptr< Geometry > | MakeCircle (const Point &center, Scalar radius)
static std::unique_ptr< Geometry > | MakeStrokedCircle (const Point &center, Scalar radius, Scalar stroke_width)
static std::unique_ptr< Geometry > | MakeRoundRect (const Rect &rect, const Size &radii)
static std::unique_ptr< Geometry > | MakePointField (std::vector< Point > points, Scalar radius, bool round)
static Scalar | ComputeStrokeAlphaCoverage (const Matrix &entity, Scalar stroke_width)
| Compute an alpha value to simulate lower coverage of fractional pixel strokes. More...
Static Protected Member Functions inherited from impeller::Geometry
static GeometryResult | ComputePositionGeometry (const ContentContext &renderer, const Tessellator::VertexGenerator &generator, const Entity &entity, RenderPass &pass)

## Detailed Description

A geometry that is created from a filled path object.

Definition at line 16 of file fill_path_geometry.h.

## Constructor & Destructor Documentation

## ◆ FillPathGeometry()

impeller::FillPathGeometry::FillPathGeometry | ( | const Path & | path,
|  | std::optional< Rect > | inner_rect = `std::nullopt`
| ) |  |
| explicit

Definition at line 15 of file fill_path_geometry.cc.

17 : path_(path), inner_rect_(inner_rect) {}

## ◆ ~FillPathGeometry()

impeller::FillPathGeometry::~FillPathGeometry | ( |  | ) |
| override

Definition at line 19 of file fill_path_geometry.cc.

19 {}

## Member Function Documentation

## ◆ CoversArea()

bool impeller::FillPathGeometry::CoversArea | ( | const Matrix & | transform,
|  | const Rect & | rect
| ) |  | const
| overridevirtual

Determines if this geometry, transformed by the given `transform`, will completely cover all surface area of the given `rect`.

This is a conservative estimate useful for certain optimizations.

Returns
  `true` if the transformed geometry is guaranteed to cover the given `rect`. May return `false` in many undetected cases where the transformed geometry does in fact cover the `rect`.

Reimplemented from impeller::Geometry.

Definition at line 74 of file fill_path_geometry.cc.

75 {
76 if (!inner_rect_.has_value()) {
77 return false;
78 }
79 if (!transform.IsTranslationScaleOnly()) {
80 return false;
81 }
82 Rect coverage = inner_rect_->TransformBounds(transform);
83 return coverage.Contains(rect);
84 }

References impeller::TRect< T >::Contains(), and transform.

The documentation for this class was generated from the following files:

- impeller/entity/geometry/fill_path_geometry.h
- impeller/entity/geometry/fill_path_geometry.cc

transform
Matrix transform
Definition: gaussian_blur_filter_contents.cc:213
impeller::Rect
TRect< Scalar > Rect
Definition: rect.h:776