point_field_geometry.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FLUTTER_IMPELLER_ENTITY_GEOMETRY_POINT_FIELD_GEOMETRY_H_
#define FLUTTER_IMPELLER_ENTITY_GEOMETRY_POINT_FIELD_GEOMETRY_H_
 
#include "impeller/entity/geometry/geometry.h"
 
namespace impeller {
 
/// @brief A geometry class specialized for Canvas::DrawPoints.
///
/// Does not hold ownership of the allocated point data, which is expected to be
/// maintained via the display list structure.
class PointFieldGeometry final : public Geometry {
 public:
  PointFieldGeometry(const Point* points,
                     size_t point_count,
                     Scalar radius,
                     bool round);
 
  ~PointFieldGeometry() override;
 
  // |Geometry|
  std::optional<Rect> GetCoverage(const Matrix& transform) const override;
 
 private:
  // |Geometry|
  GeometryResult GetPositionBuffer(const ContentContext& renderer,
                                   const Entity& entity,
                                   RenderPass& pass) const override;
 
  size_t point_count_;
  Scalar radius_;
  bool round_;
  const Point* points_;
 
  PointFieldGeometry(const PointFieldGeometry&) = delete;
 
  PointFieldGeometry& operator=(const PointFieldGeometry&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_ENTITY_GEOMETRY_POINT_FIELD_GEOMETRY_H_