Flutter Impeller
point_field_geometry.h
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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_POINT_FIELD_GEOMETRY_H_
6 #define FLUTTER_IMPELLER_ENTITY_GEOMETRY_POINT_FIELD_GEOMETRY_H_
7 
9 
10 namespace impeller {
11 
12 /// @brief A geometry class specialized for Canvas::DrawPoints.
13 ///
14 /// Does not hold ownership of the allocated point data, which is expected to be
15 /// maintained via the display list structure.
16 class PointFieldGeometry final : public Geometry {
17  public:
19  size_t point_count,
20  Scalar radius,
21  bool round);
22 
23  ~PointFieldGeometry() override;
24 
25  // |Geometry|
26  std::optional<Rect> GetCoverage(const Matrix& transform) const override;
27 
28  private:
29  // |Geometry|
30  GeometryResult GetPositionBuffer(const ContentContext& renderer,
31  const Entity& entity,
32  RenderPass& pass) const override;
33 
34  size_t point_count_;
35  Scalar radius_;
36  bool round_;
37  const Point* points_;
38 
39  PointFieldGeometry(const PointFieldGeometry&) = delete;
40 
41  PointFieldGeometry& operator=(const PointFieldGeometry&) = delete;
42 };
43 
44 } // namespace impeller
45 
46 #endif // FLUTTER_IMPELLER_ENTITY_GEOMETRY_POINT_FIELD_GEOMETRY_H_
A geometry class specialized for Canvas::DrawPoints.
std::optional< Rect > GetCoverage(const Matrix &transform) const override
PointFieldGeometry(const Point *points, size_t point_count, Scalar radius, bool round)
Render passes encode render commands directed as one specific render target into an underlying comman...
Definition: render_pass.h:30
float Scalar
Definition: scalar.h:19
A 4x4 matrix using column-major storage.
Definition: matrix.h:37
std::vector< Point > points