display_list_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_DISPLAY_LIST_LAYER_H_
#define FLUTTER_FLOW_LAYERS_DISPLAY_LIST_LAYER_H_
 
#include <memory>
 
#include "flutter/common/macros.h"
#include "flutter/display_list/display_list.h"
#include "flutter/flow/layers/display_list_raster_cache_item.h"
#include "flutter/flow/layers/layer.h"
#include "flutter/flow/raster_cache_item.h"
 
namespace flutter {
 
class DisplayListLayer : public Layer {
 public:
  static constexpr size_t kMaxBytesToCompare = 10000;
 
  DisplayListLayer(const DlPoint& offset,
                   sk_sp<DisplayList> display_list,
                   bool is_complex,
                   bool will_change);
 
  DisplayList* display_list() const { return display_list_.get(); }
 
  bool IsReplacing(DiffContext* context, const Layer* layer) const override;
 
  void Diff(DiffContext* context, const Layer* old_layer) override;
 
  const DisplayListLayer* as_display_list_layer() const override {
    return this;
  }
 
  void Preroll(PrerollContext* frame) override;
 
  void Paint(PaintContext& context) const override;
 
#if !SLIMPELLER
  const DisplayListRasterCacheItem* raster_cache_item() const {
    return display_list_raster_cache_item_.get();
  }
 
  RasterCacheKeyID caching_key_id() const override {
    return RasterCacheKeyID(display_list()->unique_id(),
                            RasterCacheKeyType::kDisplayList);
  }
#endif  //  !SLIMPELLER
 
 private:
  NOT_SLIMPELLER(std::unique_ptr<DisplayListRasterCacheItem>
                     display_list_raster_cache_item_);
 
  DlPoint offset_;
  DlRect bounds_;
 
  sk_sp<DisplayList> display_list_;
 
  static bool Compare(DiffContext::Statistics& statistics,
                      const DisplayListLayer* l1,
                      const DisplayListLayer* l2);
 
  FML_DISALLOW_COPY_AND_ASSIGN(DisplayListLayer);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_FLOW_LAYERS_DISPLAY_LIST_LAYER_H_