cacheable_layer.h

Go to the documentation of this file.

// 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_CACHEABLE_LAYER_H_
#define FLUTTER_FLOW_LAYERS_CACHEABLE_LAYER_H_
 
#include <memory>
 
#include "flutter/flow/layers/container_layer.h"
#include "flutter/flow/layers/layer_raster_cache_item.h"
#include "flutter/flow/raster_cache_util.h"
 
namespace flutter {
 
class AutoCache {
 public:
  AutoCache(RasterCacheItem* raster_cache_item,
            PrerollContext* context,
            const DlMatrix& matrix);
 
  void ShouldNotBeCached() { raster_cache_item_ = nullptr; }
 
  ~AutoCache();
 
 private:
  inline bool IsCacheEnabled();
  RasterCacheItem* raster_cache_item_ = nullptr;
  [[maybe_unused]] PrerollContext* context_ = nullptr;
  const DlMatrix matrix_;
};
 
class CacheableContainerLayer : public ContainerLayer {
 public:
  explicit CacheableContainerLayer(
      int layer_cached_threshold =
          RasterCacheUtil::kMinimumRendersBeforeCachingFilterLayer,
      bool can_cache_children = false);
 
#if !SLIMPELLER
  const LayerRasterCacheItem* raster_cache_item() const {
    return layer_raster_cache_item_.get();
  }
 
 protected:
  std::unique_ptr<LayerRasterCacheItem> layer_raster_cache_item_;
#endif  //  !SLIMPELLER
};
 
}  // namespace flutter
 
#endif  // FLUTTER_FLOW_LAYERS_CACHEABLE_LAYER_H_