container_layer.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_FLOW_LAYERS_CONTAINER_LAYER_H_
#define FLUTTER_FLOW_LAYERS_CONTAINER_LAYER_H_
 
#include <vector>
 
#include "flutter/flow/layers/layer.h"
 
namespace flutter {
 
class ContainerLayer : public Layer {
 public:
  ContainerLayer();
 
  void Diff(DiffContext* context, const Layer* old_layer) override;
  void PreservePaintRegion(DiffContext* context) override;
 
  virtual void Add(std::shared_ptr<Layer> layer);
 
  void Preroll(PrerollContext* context) override;
  void Paint(PaintContext& context) const override;
 
  const std::vector<std::shared_ptr<Layer>>& layers() const { return layers_; }
 
  virtual void DiffChildren(DiffContext* context,
                            const ContainerLayer* old_layer);
 
  void PaintChildren(PaintContext& context) const override;
 
  const ContainerLayer* as_container_layer() const override { return this; }
 
  const SkRect& child_paint_bounds() const { return child_paint_bounds_; }
  void set_child_paint_bounds(const SkRect& bounds) {
    child_paint_bounds_ = bounds;
  }
 
  int children_renderable_state_flags() const {
    return children_renderable_state_flags_;
  }
  void set_children_renderable_state_flags(int flags) {
    children_renderable_state_flags_ = flags;
  }
 
 protected:
  void PrerollChildren(PrerollContext* context, SkRect* child_paint_bounds);
 
 private:
  std::vector<std::shared_ptr<Layer>> layers_;
  SkRect child_paint_bounds_;
  int children_renderable_state_flags_ = 0;
 
  FML_DISALLOW_COPY_AND_ASSIGN(ContainerLayer);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_FLOW_LAYERS_CONTAINER_LAYER_H_