#include <geometry.h>

Inheritance diagram for impeller::Geometry:

Public Member Functions
virtual GeometryResult	GetPositionBuffer (const ContentContext &renderer, const Entity &entity, RenderPass &pass) const =0

virtual GeometryResult	GetPositionUVBuffer (Rect texture_coverage, Matrix effect_transform, const ContentContext &renderer, const Entity &entity, RenderPass &pass) const =0

virtual GeometryResult::Mode	GetResultMode () const

virtual GeometryVertexType	GetVertexType () const =0

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

Static Public Member Functions
static std::shared_ptr< Geometry >	MakeFillPath (const Path &path, std::optional< Rect > inner_rect=std::nullopt)

static std::shared_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::shared_ptr< Geometry >	MakeCover ()

static std::shared_ptr< Geometry >	MakeRect (const Rect &rect)

static std::shared_ptr< Geometry >	MakeOval (const Rect &rect)

static std::shared_ptr< Geometry >	MakeLine (const Point &p0, const Point &p1, Scalar width, Cap cap)

static std::shared_ptr< Geometry >	MakeCircle (const Point &center, Scalar radius)

static std::shared_ptr< Geometry >	MakeStrokedCircle (const Point &center, Scalar radius, Scalar stroke_width)

static std::shared_ptr< Geometry >	MakeRoundRect (const Rect &rect, const Size &radii)

static std::shared_ptr< Geometry >	MakePointField (std::vector< Point > points, Scalar radius, bool round)

Static Protected Member Functions
static GeometryResult	ComputePositionGeometry (const ContentContext &renderer, const Tessellator::VertexGenerator &generator, const Entity &entity, RenderPass &pass)

static GeometryResult	ComputePositionUVGeometry (const ContentContext &renderer, const Tessellator::VertexGenerator &generator, const Matrix &uv_transform, const Entity &entity, RenderPass &pass)

Detailed Description

Definition at line 83 of file geometry.h.

Member Function Documentation

◆ CanApplyMaskFilter()

bool impeller::Geometry::CanApplyMaskFilter ( ) const

virtual

Reimplemented in impeller::CoverGeometry.

Definition at line 243 of file geometry.cc.

                                         {
   return true;
 }

◆ ComputePositionGeometry()

GeometryResult impeller::Geometry::ComputePositionGeometry	(	const ContentContext &	renderer,
		const Tessellator::VertexGenerator &	generator,
		const Entity &	entity,
		RenderPass &	pass
	)

staticprotected

Definition at line 25 of file geometry.cc.

                       {
   using VT = SolidFillVertexShader::PerVertexData;
  
   size_t count = generator.GetVertexCount();
  
   return GeometryResult{
       .type = generator.GetTriangleType(),
       .vertex_buffer =
           {
               .vertex_buffer = renderer.GetTransientsBuffer().Emplace(
                   count * sizeof(VT), alignof(VT),
                   [&generator](uint8_t* buffer) {
                     auto vertices = reinterpret_cast<VT*>(buffer);
                     generator.GenerateVertices([&vertices](const Point& p) {
                       *vertices++ = {
                           .position = p,
                       };
                     });
                     FML_DCHECK(vertices == reinterpret_cast<VT*>(buffer) +
                                                generator.GetVertexCount());
                   }),
               .vertex_count = count,
               .index_type = IndexType::kNone,
           },
       .transform = entity.GetShaderTransform(pass),
   };
 }

References impeller::HostBuffer::Emplace(), impeller::Tessellator::VertexGenerator::GenerateVertices(), impeller::Entity::GetShaderTransform(), impeller::ContentContext::GetTransientsBuffer(), impeller::Tessellator::VertexGenerator::GetTriangleType(), impeller::Tessellator::VertexGenerator::GetVertexCount(), impeller::kNone, and impeller::GeometryResult::type.

◆ ComputePositionUVGeometry()

GeometryResult impeller::Geometry::ComputePositionUVGeometry	(	const ContentContext &	renderer,
		const Tessellator::VertexGenerator &	generator,
		const Matrix &	uv_transform,
		const Entity &	entity,
		RenderPass &	pass
	)

staticprotected

Definition at line 57 of file geometry.cc.

                       {
   using VT = TextureFillVertexShader::PerVertexData;
  
   size_t count = generator.GetVertexCount();
  
   return GeometryResult{
       .type = generator.GetTriangleType(),
       .vertex_buffer =
           {
               .vertex_buffer = renderer.GetTransientsBuffer().Emplace(
                   count * sizeof(VT), alignof(VT),
                   [&generator, &uv_transform](uint8_t* buffer) {
                     auto vertices = reinterpret_cast<VT*>(buffer);
                     generator.GenerateVertices(
                         [&vertices, &uv_transform](const Point& p) {  //
                           *vertices++ = {
                               .position = p,
                               .texture_coords = uv_transform * p,
                           };
                         });
                     FML_DCHECK(vertices == reinterpret_cast<VT*>(buffer) +
                                                generator.GetVertexCount());
                   }),
               .vertex_count = count,
               .index_type = IndexType::kNone,
           },
       .transform = entity.GetShaderTransform(pass),
   };
 }

References impeller::HostBuffer::Emplace(), impeller::Tessellator::VertexGenerator::GenerateVertices(), impeller::Entity::GetShaderTransform(), impeller::ContentContext::GetTransientsBuffer(), impeller::Tessellator::VertexGenerator::GetTriangleType(), impeller::Tessellator::VertexGenerator::GetVertexCount(), impeller::kNone, and impeller::GeometryResult::type.

◆ CoversArea()

bool impeller::Geometry::CoversArea	(	const Matrix &	transform,
		const Rect &	rect
	)		const

virtual

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 in impeller::CircleGeometry, impeller::FillPathGeometry, impeller::EllipseGeometry, impeller::RoundRectGeometry, impeller::LineGeometry, impeller::CoverGeometry, and impeller::RectGeometry.

Definition at line 235 of file geometry.cc.

                                                                          {
   return false;
 }

◆ GetCoverage()

virtual std::optional<Rect> impeller::Geometry::GetCoverage ( const Matrix & transform ) const

pure virtual

Implemented in impeller::VerticesGeometry, and impeller::RectGeometry.

◆ GetPositionBuffer()

virtual GeometryResult impeller::Geometry::GetPositionBuffer	(	const ContentContext &	renderer,
		const Entity &	entity,
		RenderPass &	pass
	)		const

pure virtual

Implemented in impeller::VerticesGeometry, and impeller::RectGeometry.

◆ GetPositionUVBuffer()

GeometryResult impeller::Geometry::GetPositionUVBuffer	(	Rect	texture_coverage,
		Matrix	effect_transform,
		const ContentContext &	renderer,
		const Entity &	entity,
		RenderPass &	pass
	)		const

pure virtual

Implemented in impeller::RectGeometry, and impeller::VerticesGeometry.

Definition at line 163 of file geometry.cc.

                                                                      {
   return {};
 }

◆ GetResultMode()

GeometryResult::Mode impeller::Geometry::GetResultMode ( ) const

virtual

Definition at line 171 of file geometry.cc.

                                                  {
   return GeometryResult::Mode::kNormal;
 }

References impeller::GeometryResult::kNormal.

◆ GetVertexType()

virtual GeometryVertexType impeller::Geometry::GetVertexType ( ) const

pure virtual

Implemented in impeller::VerticesGeometry, and impeller::RectGeometry.

◆ IsAxisAlignedRect()

bool impeller::Geometry::IsAxisAlignedRect ( ) const

virtual

Reimplemented in impeller::CircleGeometry, impeller::EllipseGeometry, impeller::RoundRectGeometry, impeller::LineGeometry, and impeller::RectGeometry.

Definition at line 239 of file geometry.cc.

                                        {
   return false;
 }

◆ MakeCircle()

std::shared_ptr< Geometry > impeller::Geometry::MakeCircle	(	const Point &	center,
		Scalar	radius
	)

static

Definition at line 219 of file geometry.cc.

                                                               {
   return std::make_shared<CircleGeometry>(center, radius);
 }

◆ MakeCover()

std::shared_ptr< Geometry > impeller::Geometry::MakeCover ( )

static

Definition at line 200 of file geometry.cc.

                                             {
   return std::make_shared<CoverGeometry>();
 }

Referenced by impeller::testing::TEST_P().

◆ MakeFillPath()

std::shared_ptr< Geometry > impeller::Geometry::MakeFillPath	(	const Path &	path,
		std::optional< Rect >	inner_rect = `std::nullopt`
	)

static

Definition at line 175 of file geometry.cc.

                                   {
   return std::make_shared<FillPathGeometry>(path, inner_rect);
 }

Referenced by impeller::SolidColorContents::Make(), impeller::testing::TEST(), and impeller::testing::TEST_P().

◆ MakeLine()

std::shared_ptr< Geometry > impeller::Geometry::MakeLine	(	const Point &	p0,
		const Point &	p1,
		Scalar	width,
		Cap	cap
	)

static

Definition at line 212 of file geometry.cc.

                                                       {
   return std::make_shared<LineGeometry>(p0, p1, width, cap);
 }

Referenced by impeller::testing::TEST().

◆ MakeOval()

std::shared_ptr< Geometry > impeller::Geometry::MakeOval ( const Rect & rect )

static

Definition at line 208 of file geometry.cc.

                                                            {
   return std::make_shared<EllipseGeometry>(rect);
 }

◆ MakePointField()

std::shared_ptr< Geometry > impeller::Geometry::MakePointField	(	std::vector< Point >	points,
		Scalar	radius,
		bool	round
	)

static

Definition at line 181 of file geometry.cc.

                                                                {
   return std::make_shared<PointFieldGeometry>(std::move(points), radius, round);
 }

Referenced by impeller::testing::TEST_P().

◆ MakeRect()

std::shared_ptr< Geometry > impeller::Geometry::MakeRect ( const Rect & rect )

static

Definition at line 204 of file geometry.cc.

                                                            {
   return std::make_shared<RectGeometry>(rect);
 }

Referenced by impeller::Paint::MaskBlurDescriptor::CreateMaskBlur(), impeller::PipelineBlend(), impeller::testing::TEST(), and impeller::testing::TEST_P().

◆ MakeRoundRect()

std::shared_ptr< Geometry > impeller::Geometry::MakeRoundRect	(	const Rect &	rect,
		const Size &	radii
	)

static

Definition at line 230 of file geometry.cc.

                                                                      {
   return std::make_shared<RoundRectGeometry>(rect, radii);
 }

Referenced by impeller::testing::TEST().

◆ MakeStrokedCircle()

std::shared_ptr< Geometry > impeller::Geometry::MakeStrokedCircle	(	const Point &	center,
		Scalar	radius,
		Scalar	stroke_width
	)

static

Definition at line 224 of file geometry.cc.

                                                                            {
   return std::make_shared<CircleGeometry>(center, radius, stroke_width);
 }

References stroke_width.

◆ MakeStrokePath()

std::shared_ptr< Geometry > impeller::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

Definition at line 187 of file geometry.cc.

                                                                      {
   // Skia behaves like this.
   if (miter_limit < 0) {
     miter_limit = 4.0;
   }
   return std::make_shared<StrokePathGeometry>(path, stroke_width, miter_limit,
                                               stroke_cap, stroke_join);
 }

References stroke_width.

Referenced by impeller::testing::TEST_P().

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

impeller/entity/geometry/geometry.h
impeller/entity/geometry/geometry.cc

Public Member Functions

Static Public Member Functions

Static Protected Member Functions

Detailed Description

Member Function Documentation

◆ CanApplyMaskFilter()

◆ ComputePositionGeometry()

◆ ComputePositionUVGeometry()

◆ CoversArea()

◆ GetCoverage()

◆ GetPositionBuffer()

◆ GetPositionUVBuffer()

◆ GetResultMode()

◆ GetVertexType()

◆ IsAxisAlignedRect()

◆ MakeCircle()

◆ MakeCover()

◆ MakeFillPath()

◆ MakeLine()

◆ MakeOval()

◆ MakePointField()

◆ MakeRect()

◆ MakeRoundRect()

◆ MakeStrokedCircle()

◆ MakeStrokePath()