Move ImageSerializationProcessor code to blimp/client/core

blimp/client/feature/compositor/blimp_client_picture_cache.cc

-// 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.
-
-#include "blimp/client/feature/compositor/blimp_client_picture_cache.h"
-
-#include <utility>
-#include <vector>
-
-#include "third_party/skia/include/core/SkStream.h"
-
-namespace blimp {
-namespace client {
-namespace {
-
-// Helper function to deserialize the content of |picture_data| into an
-// SkPicture.
-sk_sp<const SkPicture> DeserializePicture(
-    SkPicture::InstallPixelRefProc pixel_deserializer,
-    const cc::PictureData& picture_data) {
-  SkMemoryStream stream(picture_data.data);
-  return SkPicture::MakeFromStream(&stream, pixel_deserializer);
-}
-
-}  // namespace
-
-BlimpClientPictureCache::BlimpClientPictureCache(
-    SkPicture::InstallPixelRefProc pixel_deserializer)
-    : pixel_deserializer_(pixel_deserializer) {}
-
-BlimpClientPictureCache::~BlimpClientPictureCache() = default;
-
-sk_sp<const SkPicture> BlimpClientPictureCache::GetPicture(
-    uint32_t engine_picture_id) {
-  return GetPictureFromCache(engine_picture_id);
-}
-
-void BlimpClientPictureCache::ApplyCacheUpdate(
-    const std::vector<cc::PictureData>& cache_update) {
-  // Add new pictures from the |cache_update| to |pictures_|.
-  for (const cc::PictureData& picture_data : cache_update) {
-    DCHECK(pictures_.find(picture_data.unique_id) == pictures_.end());
-    sk_sp<const SkPicture> deserialized_picture =
-        DeserializePicture(pixel_deserializer_, picture_data);
-
-    pictures_[picture_data.unique_id] = std::move(deserialized_picture);
-
-#if DCHECK_IS_ON()
-    last_added_.insert(picture_data.unique_id);
-#endif  // DCHECK_IS_ON()
-  }
-}
-
-void BlimpClientPictureCache::Flush() {
-  // Calculate which pictures can now be removed. |added| is only used for
-  // verifying that what we calculated matches the new items that have been
-  // inserted into the cache.
-  std::vector<uint32_t> added;
-  std::vector<uint32_t> removed;
-  reference_tracker_.CommitRefCounts(&added, &removed);
-
-  VerifyCacheUpdateMatchesReferenceTrackerData(added);
-
-  RemoveUnusedPicturesFromCache(removed);
-  reference_tracker_.ClearRefCounts();
-}
-
-void BlimpClientPictureCache::MarkUsed(uint32_t engine_picture_id) {
-  reference_tracker_.IncrementRefCount(engine_picture_id);
-}
-
-void BlimpClientPictureCache::RemoveUnusedPicturesFromCache(
-    const std::vector<uint32_t>& removed) {
-  for (const auto& engine_picture_id : removed) {
-    auto entry = pictures_.find(engine_picture_id);
-    DCHECK(entry != pictures_.end());
-    pictures_.erase(entry);
-  }
-}
-
-sk_sp<const SkPicture> BlimpClientPictureCache::GetPictureFromCache(
-    uint32_t engine_picture_id) {
-  DCHECK(pictures_.find(engine_picture_id) != pictures_.end());
-  return pictures_[engine_picture_id];
-}
-
-void BlimpClientPictureCache::VerifyCacheUpdateMatchesReferenceTrackerData(
-    const std::vector<uint32_t>& new_tracked_items) {
-#if DCHECK_IS_ON()
-  DCHECK_EQ(new_tracked_items.size(), last_added_.size());
-  DCHECK(std::unordered_set<uint32_t>(new_tracked_items.begin(),
-                                      new_tracked_items.end()) == last_added_);
-  last_added_.clear();
-#endif  // DCHECK_IS_ON()
-}
-
-}  // namespace client
-}  // namespace blimp