An abstract Geometry base class that produces fillable vertices representing the stroked outline of the segments provided by the subclass in the virtual |Dispatch| method. More...
#include <stroke_path_geometry.h>
Public Member Functions | |
~StrokeSegmentsGeometry () override | |
Scalar | GetStrokeWidth () const |
Scalar | GetMiterLimit () const |
Cap | GetStrokeCap () const |
Join | GetStrokeJoin () const |
Scalar | ComputeAlphaCoverage (const Matrix &transform) const override |
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virtual | ~Geometry () |
virtual std::optional< Rect > | GetCoverage (const Matrix &transform) const =0 |
virtual bool | CoversArea (const Matrix &transform, const Rect &rect) const |
Determines if this geometry, transformed by the given transform , will completely cover all surface area of the given rect . More... | |
virtual bool | IsAxisAlignedRect () const |
virtual bool | CanApplyMaskFilter () const |
Protected Member Functions | |
StrokeSegmentsGeometry (const StrokeParameters ¶meters) | |
virtual void | Dispatch (PathAndArcSegmentReceiver &receiver, Tessellator &tessellator, Scalar scale) const =0 |
std::optional< Rect > | GetStrokeCoverage (const Matrix &transform, const Rect &segment_bounds) const |
Friends | |
class | ImpellerBenchmarkAccessor |
class | ImpellerEntityUnitTestAccessor |
Additional Inherited Members | |
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static std::unique_ptr< Geometry > | MakeFillPath (const flutter::DlPath &path, std::optional< Rect > inner_rect=std::nullopt) |
static std::unique_ptr< Geometry > | MakeStrokePath (const flutter::DlPath &path, const StrokeParameters &stroke={}) |
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, const StrokeParameters &stroke) |
static std::unique_ptr< Geometry > | MakeCircle (const Point ¢er, Scalar radius) |
static std::unique_ptr< Geometry > | MakeStrokedCircle (const Point ¢er, Scalar radius, Scalar stroke_width) |
static std::unique_ptr< Geometry > | MakeFilledArc (const Rect &oval_bounds, Degrees start, Degrees sweep, bool include_center) |
static std::unique_ptr< Geometry > | MakeStrokedArc (const Rect &oval_bounds, Degrees start, Degrees sweep, const StrokeParameters &stroke) |
static std::unique_ptr< Geometry > | MakeRoundRect (const Rect &rect, const Size &radii) |
static std::unique_ptr< Geometry > | MakeRoundSuperellipse (const Rect &rect, Scalar corner_radius) |
static Scalar | ComputeStrokeAlphaCoverage (const Matrix &entity, Scalar stroke_width) |
Compute an alpha value to simulate lower coverage of fractional pixel strokes. More... | |
static GeometryResult | ComputePositionGeometry (const ContentContext &renderer, const Tessellator::VertexGenerator &generator, const Entity &entity, RenderPass &pass) |
An abstract Geometry base class that produces fillable vertices representing the stroked outline of the segments provided by the subclass in the virtual |Dispatch| method.
Most subclasses will be based on an instance of |PathSource| and use the |StrokePathSourceGeometry| subclass to feed the segments from that path source object, but some subclasses may be able to operate more optimally by talking directly to the |StrokePathSegmentReceiver| (mainly arcs).
Definition at line 35 of file stroke_path_geometry.h.
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overridedefault |
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explicitprotected |
Definition at line 714 of file stroke_path_geometry.cc.
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overridevirtual |
Reimplemented from impeller::Geometry.
Definition at line 735 of file stroke_path_geometry.cc.
References impeller::Geometry::ComputeStrokeAlphaCoverage(), transform, and impeller::StrokeParameters::width.
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protectedpure virtual |
Dispatch the path segments to the StrokePathSegmentReceiver for the provided transform scale.
Implemented in impeller::ArcStrokeGeometry, and impeller::StrokePathSourceGeometry.
Scalar impeller::StrokeSegmentsGeometry::GetMiterLimit | ( | ) | const |
Definition at line 723 of file stroke_path_geometry.cc.
References impeller::StrokeParameters::miter_limit.
Cap impeller::StrokeSegmentsGeometry::GetStrokeCap | ( | ) | const |
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protected |
Provide the stroke-padded bounds for the provided bounds of the segments themselves.
Definition at line 815 of file stroke_path_geometry.cc.
References impeller::StrokeParameters::cap, impeller::TRect< T >::Expand(), impeller::TRect< T >::IsEmpty(), impeller::StrokeParameters::join, impeller::kMinStrokeSize, impeller::kMiter, impeller::kSqrt2, impeller::kSquare, impeller::StrokeParameters::miter_limit, transform, impeller::TRect< T >::TransformBounds(), and impeller::StrokeParameters::width.
Referenced by impeller::StrokePathSourceGeometry::GetCoverage(), and impeller::ArcStrokeGeometry::GetCoverage().
Join impeller::StrokeSegmentsGeometry::GetStrokeJoin | ( | ) | const |
Definition at line 731 of file stroke_path_geometry.cc.
References impeller::StrokeParameters::join.
Scalar impeller::StrokeSegmentsGeometry::GetStrokeWidth | ( | ) | const |
Definition at line 719 of file stroke_path_geometry.cc.
References impeller::StrokeParameters::width.
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friend |
Definition at line 79 of file stroke_path_geometry.h.
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friend |
Definition at line 80 of file stroke_path_geometry.h.