| Flutter Impeller |

stroke_path_geometry.h
Go to the documentation of this file.
1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef FLUTTER_IMPELLER_ENTITY_GEOMETRY_STROKE_PATH_GEOMETRY_H_
6 #define FLUTTER_IMPELLER_ENTITY_GEOMETRY_STROKE_PATH_GEOMETRY_H_
7
8 #include "impeller/entity/geometry/geometry.h"
9
10 namespace impeller {
11
12 /// @brief A geometry that is created from a stroked path object.
13 class StrokePathGeometry final : public Geometry {
14 public:
15 StrokePathGeometry(Path path,
16 Scalar stroke_width,
17 Scalar miter_limit,
18 Cap stroke_cap,
19 Join stroke_join);
20
21 ~StrokePathGeometry();
22
23 Scalar GetStrokeWidth() const;
24
25 Scalar GetMiterLimit() const;
26
27 Cap GetStrokeCap() const;
28
29 Join GetStrokeJoin() const;
30
31 private:
32 using VS = SolidFillVertexShader;
33
34 using CapProc =
35 std::function<void(VertexBufferBuilder<VS::PerVertexData>& vtx_builder,
36 const Point& position,
37 const Point& offset,
38 Scalar scale,
39 bool reverse)>;
40 using JoinProc =
41 std::function<void(VertexBufferBuilder<VS::PerVertexData>& vtx_builder,
42 const Point& position,
43 const Point& start_offset,
44 const Point& end_offset,
45 Scalar miter_limit,
46 Scalar scale)>;
47
48 // |Geometry|
49 GeometryResult GetPositionBuffer(const ContentContext& renderer,
50 const Entity& entity,
51 RenderPass& pass) const override;
52
53 // |Geometry|
54 GeometryResult GetPositionUVBuffer(Rect texture_coverage,
55 Matrix effect_transform,
56 const ContentContext& renderer,
57 const Entity& entity,
58 RenderPass& pass) const override;
59
60 // |Geometry|
61 GeometryVertexType GetVertexType() const override;
62
63 // |Geometry|
64 std::optional<Rect> GetCoverage(const Matrix& transform) const override;
65
66 bool SkipRendering() const;
67
68 static Scalar CreateBevelAndGetDirection(
69 VertexBufferBuilder<SolidFillVertexShader::PerVertexData>& vtx_builder,
70 const Point& position,
71 const Point& start_offset,
72 const Point& end_offset);
73
74 static VertexBufferBuilder<SolidFillVertexShader::PerVertexData>
75 CreateSolidStrokeVertices(const Path& path,
76 Scalar stroke_width,
77 Scalar scaled_miter_limit,
78 const JoinProc& join_proc,
79 const CapProc& cap_proc,
80 Scalar scale);
81
82 static StrokePathGeometry::JoinProc GetJoinProc(Join stroke_join);
83
84 static StrokePathGeometry::CapProc GetCapProc(Cap stroke_cap);
85
86 Path path_;
87 Scalar stroke_width_;
88 Scalar miter_limit_;
89 Cap stroke_cap_;
90 Join stroke_join_;
91
92 StrokePathGeometry(const StrokePathGeometry&) = delete;
93
94 StrokePathGeometry& operator=(const StrokePathGeometry&) = delete;
95 };
96
97 } // namespace impeller
98
99 #endif // FLUTTER_IMPELLER_ENTITY_GEOMETRY_STROKE_PATH_GEOMETRY_H_
impeller::Scalar
float Scalar
Definition: scalar.h:18
impeller::StrokePathGeometry::~StrokePathGeometry
~StrokePathGeometry()
impeller::GeometryVertexType
GeometryVertexType
Definition: geometry.h:34
impeller::StrokePathGeometry
A geometry that is created from a stroked path object.
Definition: stroke_path_geometry.h:13
impeller::Entity
Definition: entity.h:21
impeller::Path
Paths are lightweight objects that describe a collection of linear, quadratic, or cubic segments....
Definition: path.h:55
impeller::VertexBufferBuilder
Definition: vertex_buffer_builder.h:24
impeller::StrokePathGeometry::GetMiterLimit
Scalar GetMiterLimit() const
Definition: stroke_path_geometry.cc:28
geometry.h
impeller::GeometryResult
Definition: geometry.h:20
impeller::StrokePathGeometry::GetStrokeCap
Cap GetStrokeCap() const
Definition: stroke_path_geometry.cc:32
impeller::StrokePathGeometry::GetStrokeJoin
Join GetStrokeJoin() const
Definition: stroke_path_geometry.cc:36
impeller::RenderPass
Render passes encode render commands directed as one specific render target into an underlying comman...
Definition: render_pass.h:29
impeller::Geometry
Definition: geometry.h:58
impeller::Join
Join
Definition: path.h:24
impeller::StrokePathGeometry::StrokePathGeometry
StrokePathGeometry(Path path, Scalar stroke_width, Scalar miter_limit, Cap stroke_cap, Join stroke_join)
Definition: stroke_path_geometry.cc:11
impeller::TPoint< Scalar >
impeller
Definition: aiks_context.cc:10
impeller::ContentContext
Definition: content_context.h:332
impeller::TRect< Scalar >
impeller::Matrix
A 4x4 matrix using column-major storage.
Definition: matrix.h:37
impeller::StrokePathGeometry::GetStrokeWidth
Scalar GetStrokeWidth() const
Definition: stroke_path_geometry.cc:24
impeller::Cap
Cap
Definition: path.h:18