Move ImageSerializationProcessor code to blimp/client/core

blimp/client/feature/compositor/blimp_client_picture_cache.h

-// Copyright 2016 The Chromium 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 BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_CLIENT_PICTURE_CACHE_H_
-#define BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_CLIENT_PICTURE_CACHE_H_
-
-#include <stdint.h>
-#include <memory>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#include "base/logging.h"
-#include "base/macros.h"
-#include "blimp/common/compositor/reference_tracker.h"
-#include "cc/blimp/client_picture_cache.h"
-#include "cc/blimp/engine_picture_cache.h"
-#include "cc/blimp/picture_data.h"
-#include "third_party/skia/include/core/SkPicture.h"
-#include "third_party/skia/include/core/SkRefCnt.h"
-
-namespace blimp {
-namespace client {
-
-// BlimpClientPictureCache provides functionality for caching SkPictures once
-// they are received from the engine, and cleaning up once the pictures are no
-// longer in use. It is required to update this cache when an SkPicture starts
-// being used and when it is not longer in use by calling
-// MarkPictureForRegistration and MarkPictureForUnregistration respectively.
-class BlimpClientPictureCache : public cc::ClientPictureCache {
- public:
-  explicit BlimpClientPictureCache(
-      SkPicture::InstallPixelRefProc pixel_deserializer);
-  ~BlimpClientPictureCache() override;
-
-  // cc::ClientPictureCache implementation.
-  sk_sp<const SkPicture> GetPicture(uint32_t engine_picture_id) override;
-  void ApplyCacheUpdate(
-      const std::vector<cc::PictureData>& cache_update) override;
-  void Flush() override;
-  void MarkUsed(uint32_t engine_picture_id) override;
-
- private:
-  // Removes all pictures specified in |picture_ids| from |pictures_|. The
-  // picture IDs passed to this function must refer to the pictures that are no
-  // longer in use.
-  void RemoveUnusedPicturesFromCache(const std::vector<uint32_t>& picture_ids);
-
-  // Retrieves the SkPicture with the given |picture_id| from the cache. The
-  // given |picture_id| is the unique ID that the engine used to identify the
-  // picture in the cc::PictureCacheUpdate that contained the image.
-  sk_sp<const SkPicture> GetPictureFromCache(uint32_t picture_id);
-
-  // Verify that the incoming cache update matches the new items that were added
-  // to the |reference_tracker_|.
-  void VerifyCacheUpdateMatchesReferenceTrackerData(
-      const std::vector<uint32_t>& new_tracked_items);
-
-#if DCHECK_IS_ON()
-  // A set of the items that were added when the last cache update was applied.
-  // Used for verifying that the calculation from the registry matches the
-  // expectations.
-  std::unordered_set<uint32_t> last_added_;
-#endif  // DCHECK_IS_ON()
-
-  // A function pointer valid to use for deserializing images when
-  // using SkPicture::CreateFromStream to create an SkPicture from a stream.
-  SkPicture::InstallPixelRefProc pixel_deserializer_;
-
-  // The current cache of SkPictures. The key is the unique ID used by the
-  // engine, and the value is the SkPicture itself.
-  std::unordered_map<uint32_t, sk_sp<const SkPicture>> pictures_;
-
-  // The reference tracker maintains the reference count of used SkPictures.
-  ReferenceTracker reference_tracker_;
-
-  DISALLOW_COPY_AND_ASSIGN(BlimpClientPictureCache);
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_CLIENT_PICTURE_CACHE_H_