| // Copyright 2014 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 "chrome/browser/android/thumbnail/thumbnail_cache.h" |
| |
| #include <algorithm> |
| #include <cmath> |
| #include <utility> |
| |
| #include "base/android/application_status_listener.h" |
| #include "base/android/path_utils.h" |
| #include "base/big_endian.h" |
| #include "base/files/file.h" |
| #include "base/files/file_enumerator.h" |
| #include "base/files/file_path.h" |
| #include "base/files/file_util.h" |
| #include "base/stl_util.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/task_scheduler/post_task.h" |
| #include "base/time/time.h" |
| #include "build/build_config.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "third_party/android_opengl/etc1/etc1.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "third_party/skia/include/core/SkCanvas.h" |
| #include "third_party/skia/include/core/SkData.h" |
| #include "third_party/skia/include/core/SkMallocPixelRef.h" |
| #include "third_party/skia/include/core/SkPixelRef.h" |
| #include "ui/android/resources/ui_resource_provider.h" |
| #include "ui/display/display.h" |
| #include "ui/display/screen.h" |
| #include "ui/gfx/geometry/size_conversions.h" |
| |
| namespace { |
| |
| const float kApproximationScaleFactor = 4.f; |
| const base::TimeDelta kCaptureMinRequestTimeMs( |
| base::TimeDelta::FromMilliseconds(1000)); |
| |
| const int kCompressedKey = 0xABABABAB; |
| const int kCurrentExtraVersion = 1; |
| |
| // Indicates whether we prefer to have more free CPU memory over GPU memory. |
| const bool kPreferCPUMemory = true; |
| |
| size_t NextPowerOfTwo(size_t x) { |
| --x; |
| x |= x >> 1; |
| x |= x >> 2; |
| x |= x >> 4; |
| x |= x >> 8; |
| x |= x >> 16; |
| return x + 1; |
| } |
| |
| size_t RoundUpMod4(size_t x) { |
| return (x + 3) & ~3; |
| } |
| |
| gfx::Size GetEncodedSize(const gfx::Size& bitmap_size, bool supports_npot) { |
| DCHECK(!bitmap_size.IsEmpty()); |
| if (!supports_npot) |
| return gfx::Size(NextPowerOfTwo(bitmap_size.width()), |
| NextPowerOfTwo(bitmap_size.height())); |
| else |
| return gfx::Size(RoundUpMod4(bitmap_size.width()), |
| RoundUpMod4(bitmap_size.height())); |
| } |
| |
| template<typename T> |
| bool ReadBigEndianFromFile(base::File& file, T* out) { |
| char buffer[sizeof(T)]; |
| if (file.ReadAtCurrentPos(buffer, sizeof(T)) != sizeof(T)) |
| return false; |
| base::ReadBigEndian(buffer, out); |
| return true; |
| } |
| |
| template<typename T> |
| bool WriteBigEndianToFile(base::File& file, T val) { |
| char buffer[sizeof(T)]; |
| base::WriteBigEndian(buffer, val); |
| return file.WriteAtCurrentPos(buffer, sizeof(T)) == sizeof(T); |
| } |
| |
| bool ReadBigEndianFloatFromFile(base::File& file, float* out) { |
| char buffer[sizeof(float)]; |
| if (file.ReadAtCurrentPos(buffer, sizeof(buffer)) != sizeof(buffer)) |
| return false; |
| |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| for (size_t i = 0; i < sizeof(float) / 2; i++) { |
| char tmp = buffer[i]; |
| buffer[i] = buffer[sizeof(float) - 1 - i]; |
| buffer[sizeof(float) - 1 - i] = tmp; |
| } |
| #endif |
| memcpy(out, buffer, sizeof(buffer)); |
| |
| return true; |
| } |
| |
| bool WriteBigEndianFloatToFile(base::File& file, float val) { |
| char buffer[sizeof(float)]; |
| memcpy(buffer, &val, sizeof(buffer)); |
| |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| for (size_t i = 0; i < sizeof(float) / 2; i++) { |
| char tmp = buffer[i]; |
| buffer[i] = buffer[sizeof(float) - 1 - i]; |
| buffer[sizeof(float) - 1 - i] = tmp; |
| } |
| #endif |
| return file.WriteAtCurrentPos(buffer, sizeof(buffer)) == sizeof(buffer); |
| } |
| |
| } // anonymous namespace |
| |
| ThumbnailCache::ThumbnailCache(size_t default_cache_size, |
| size_t approximation_cache_size, |
| size_t compression_queue_max_size, |
| size_t write_queue_max_size, |
| bool use_approximation_thumbnail) |
| : file_sequenced_task_runner_( |
| base::CreateSequencedTaskRunnerWithTraits({base::MayBlock()})), |
| compression_queue_max_size_(compression_queue_max_size), |
| write_queue_max_size_(write_queue_max_size), |
| use_approximation_thumbnail_(use_approximation_thumbnail), |
| compression_tasks_count_(0), |
| write_tasks_count_(0), |
| read_in_progress_(false), |
| cache_(default_cache_size), |
| approximation_cache_(approximation_cache_size), |
| ui_resource_provider_(NULL), |
| weak_factory_(this) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| memory_pressure_.reset(new base::MemoryPressureListener( |
| base::Bind(&ThumbnailCache::OnMemoryPressure, base::Unretained(this)))); |
| } |
| |
| ThumbnailCache::~ThumbnailCache() { |
| SetUIResourceProvider(NULL); |
| } |
| |
| void ThumbnailCache::SetUIResourceProvider( |
| ui::UIResourceProvider* ui_resource_provider) { |
| if (ui_resource_provider_ == ui_resource_provider) |
| return; |
| |
| approximation_cache_.Clear(); |
| cache_.Clear(); |
| |
| ui_resource_provider_ = ui_resource_provider; |
| } |
| |
| void ThumbnailCache::AddThumbnailCacheObserver( |
| ThumbnailCacheObserver* observer) { |
| if (!observers_.HasObserver(observer)) |
| observers_.AddObserver(observer); |
| } |
| |
| void ThumbnailCache::RemoveThumbnailCacheObserver( |
| ThumbnailCacheObserver* observer) { |
| if (observers_.HasObserver(observer)) |
| observers_.RemoveObserver(observer); |
| } |
| |
| void ThumbnailCache::Put(TabId tab_id, |
| const SkBitmap& bitmap, |
| float thumbnail_scale) { |
| if (!ui_resource_provider_ || bitmap.empty() || thumbnail_scale <= 0) |
| return; |
| |
| if (thumbnail_meta_data_.find(tab_id) == thumbnail_meta_data_.end()) { |
| DVLOG(1) << "Thumbnail meta data was removed for tab id " << tab_id; |
| return; |
| } |
| |
| base::Time time_stamp = thumbnail_meta_data_[tab_id].capture_time(); |
| std::unique_ptr<Thumbnail> thumbnail = Thumbnail::Create( |
| tab_id, time_stamp, thumbnail_scale, ui_resource_provider_, this); |
| thumbnail->SetBitmap(bitmap); |
| |
| RemoveFromReadQueue(tab_id); |
| MakeSpaceForNewItemIfNecessary(tab_id); |
| cache_.Put(tab_id, std::move(thumbnail)); |
| |
| if (use_approximation_thumbnail_) { |
| std::pair<SkBitmap, float> approximation = |
| CreateApproximation(bitmap, thumbnail_scale); |
| std::unique_ptr<Thumbnail> approx_thumbnail = Thumbnail::Create( |
| tab_id, time_stamp, approximation.second, ui_resource_provider_, this); |
| approx_thumbnail->SetBitmap(approximation.first); |
| approximation_cache_.Put(tab_id, std::move(approx_thumbnail)); |
| } |
| CompressThumbnailIfNecessary(tab_id, time_stamp, bitmap, thumbnail_scale); |
| } |
| |
| void ThumbnailCache::Remove(TabId tab_id) { |
| cache_.Remove(tab_id); |
| approximation_cache_.Remove(tab_id); |
| thumbnail_meta_data_.erase(tab_id); |
| RemoveFromDisk(tab_id); |
| RemoveFromReadQueue(tab_id); |
| } |
| |
| Thumbnail* ThumbnailCache::Get(TabId tab_id, |
| bool force_disk_read, |
| bool allow_approximation) { |
| Thumbnail* thumbnail = cache_.Get(tab_id); |
| if (thumbnail) { |
| thumbnail->CreateUIResource(); |
| return thumbnail; |
| } |
| |
| if (force_disk_read && primary_tab_id_ != tab_id && |
| base::ContainsValue(visible_ids_, tab_id) && |
| !base::ContainsValue(read_queue_, tab_id)) { |
| read_queue_.push_back(tab_id); |
| ReadNextThumbnail(); |
| } |
| |
| if (allow_approximation) { |
| thumbnail = approximation_cache_.Get(tab_id); |
| if (thumbnail) { |
| thumbnail->CreateUIResource(); |
| return thumbnail; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| void ThumbnailCache::InvalidateThumbnailIfChanged(TabId tab_id, |
| const GURL& url) { |
| ThumbnailMetaDataMap::iterator meta_data_iter = |
| thumbnail_meta_data_.find(tab_id); |
| if (meta_data_iter == thumbnail_meta_data_.end()) { |
| thumbnail_meta_data_[tab_id] = ThumbnailMetaData(base::Time(), url); |
| } else if (meta_data_iter->second.url() != url) { |
| Remove(tab_id); |
| } |
| } |
| |
| base::FilePath ThumbnailCache::GetCacheDirectory() { |
| base::FilePath path; |
| base::android::GetThumbnailCacheDirectory(&path); |
| return path; |
| } |
| |
| base::FilePath ThumbnailCache::GetFilePath(TabId tab_id) { |
| base::FilePath path = GetCacheDirectory(); |
| return path.Append(base::IntToString(tab_id)); |
| } |
| |
| bool ThumbnailCache::CheckAndUpdateThumbnailMetaData(TabId tab_id, |
| const GURL& url) { |
| base::Time current_time = base::Time::Now(); |
| ThumbnailMetaDataMap::iterator meta_data_iter = |
| thumbnail_meta_data_.find(tab_id); |
| if (meta_data_iter != thumbnail_meta_data_.end() && |
| meta_data_iter->second.url() == url && |
| (current_time - meta_data_iter->second.capture_time()) < |
| kCaptureMinRequestTimeMs) { |
| return false; |
| } |
| |
| thumbnail_meta_data_[tab_id] = ThumbnailMetaData(current_time, url); |
| return true; |
| } |
| |
| void ThumbnailCache::UpdateVisibleIds(const TabIdList& priority, |
| TabId primary_tab_id) { |
| bool needs_update = false; |
| if (primary_tab_id_ != primary_tab_id) { |
| // The primary screen-filling tab (if any) is not pushed onto the read |
| // queue, under the assumption that it either has a live layer or will have |
| // one very soon. |
| primary_tab_id_ = primary_tab_id; |
| needs_update = true; |
| } |
| |
| size_t ids_size = std::min(priority.size(), cache_.MaximumCacheSize()); |
| if (visible_ids_.size() != ids_size) { |
| needs_update = true; |
| } else { |
| // Early out if called with the same input as last time (We only care |
| // about the first mCache.MaximumCacheSize() entries). |
| TabIdList::const_iterator visible_iter = visible_ids_.begin(); |
| TabIdList::const_iterator priority_iter = priority.begin(); |
| while (visible_iter != visible_ids_.end() && |
| priority_iter != priority.end()) { |
| if (*priority_iter != *visible_iter || !cache_.Get(*priority_iter)) { |
| needs_update = true; |
| break; |
| } |
| visible_iter++; |
| priority_iter++; |
| } |
| } |
| |
| if (!needs_update) |
| return; |
| |
| read_queue_.clear(); |
| visible_ids_.clear(); |
| size_t count = 0; |
| TabIdList::const_iterator iter = priority.begin(); |
| while (iter != priority.end() && count < ids_size) { |
| TabId tab_id = *iter; |
| visible_ids_.push_back(tab_id); |
| if (!cache_.Get(tab_id) && primary_tab_id_ != tab_id && |
| !base::ContainsValue(read_queue_, tab_id)) |
| read_queue_.push_back(tab_id); |
| iter++; |
| count++; |
| } |
| |
| ReadNextThumbnail(); |
| } |
| |
| void ThumbnailCache::DecompressThumbnailFromFile( |
| TabId tab_id, |
| const base::Callback<void(bool, SkBitmap)>& |
| post_decompress_callback) { |
| base::Callback<void(sk_sp<SkPixelRef>, float, const gfx::Size&)> |
| decompress_task = base::Bind( |
| &ThumbnailCache::DecompressionTask, post_decompress_callback); |
| |
| file_sequenced_task_runner_->PostTask( |
| FROM_HERE, |
| base::BindOnce(&ThumbnailCache::ReadTask, true, tab_id, decompress_task)); |
| } |
| |
| void ThumbnailCache::RemoveFromDisk(TabId tab_id) { |
| file_sequenced_task_runner_->PostTask( |
| FROM_HERE, base::BindOnce(&ThumbnailCache::RemoveFromDiskTask, tab_id)); |
| } |
| |
| void ThumbnailCache::RemoveFromDiskTask(TabId tab_id) { |
| base::FilePath file_path = GetFilePath(tab_id); |
| if (base::PathExists(file_path)) |
| base::DeleteFile(file_path, false); |
| } |
| |
| void ThumbnailCache::WriteThumbnailIfNecessary( |
| TabId tab_id, |
| sk_sp<SkPixelRef> compressed_data, |
| float scale, |
| const gfx::Size& content_size) { |
| if (write_tasks_count_ >= write_queue_max_size_) |
| return; |
| |
| write_tasks_count_++; |
| |
| base::Callback<void()> post_write_task = |
| base::Bind(&ThumbnailCache::PostWriteTask, weak_factory_.GetWeakPtr()); |
| file_sequenced_task_runner_->PostTask( |
| FROM_HERE, |
| base::BindOnce(&ThumbnailCache::WriteTask, tab_id, compressed_data, scale, |
| content_size, post_write_task)); |
| } |
| |
| void ThumbnailCache::CompressThumbnailIfNecessary( |
| TabId tab_id, |
| const base::Time& time_stamp, |
| const SkBitmap& bitmap, |
| float scale) { |
| if (compression_tasks_count_ >= compression_queue_max_size_) { |
| RemoveOnMatchedTimeStamp(tab_id, time_stamp); |
| return; |
| } |
| |
| compression_tasks_count_++; |
| |
| base::Callback<void(sk_sp<SkPixelRef>, const gfx::Size&)> |
| post_compression_task = base::Bind(&ThumbnailCache::PostCompressionTask, |
| weak_factory_.GetWeakPtr(), |
| tab_id, |
| time_stamp, |
| scale); |
| |
| gfx::Size raw_data_size(bitmap.width(), bitmap.height()); |
| gfx::Size encoded_size = GetEncodedSize( |
| raw_data_size, ui_resource_provider_->SupportsETC1NonPowerOfTwo()); |
| |
| base::PostTaskWithTraits(FROM_HERE, |
| {base::TaskPriority::BACKGROUND, |
| base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN}, |
| base::Bind(&ThumbnailCache::CompressionTask, bitmap, |
| encoded_size, post_compression_task)); |
| } |
| |
| void ThumbnailCache::ReadNextThumbnail() { |
| if (read_queue_.empty() || read_in_progress_) |
| return; |
| |
| TabId tab_id = read_queue_.front(); |
| read_in_progress_ = true; |
| |
| base::Callback<void(sk_sp<SkPixelRef>, float, const gfx::Size&)> |
| post_read_task = base::Bind( |
| &ThumbnailCache::PostReadTask, weak_factory_.GetWeakPtr(), tab_id); |
| |
| file_sequenced_task_runner_->PostTask( |
| FROM_HERE, |
| base::BindOnce(&ThumbnailCache::ReadTask, false, tab_id, post_read_task)); |
| } |
| |
| void ThumbnailCache::MakeSpaceForNewItemIfNecessary(TabId tab_id) { |
| if (cache_.Get(tab_id) || !base::ContainsValue(visible_ids_, tab_id) || |
| cache_.size() < cache_.MaximumCacheSize()) { |
| return; |
| } |
| |
| TabId key_to_remove; |
| bool found_key_to_remove = false; |
| |
| // 1. Find a cached item not in this list |
| for (ExpiringThumbnailCache::iterator iter = cache_.begin(); |
| iter != cache_.end(); |
| iter++) { |
| if (!base::ContainsValue(visible_ids_, iter->first)) { |
| key_to_remove = iter->first; |
| found_key_to_remove = true; |
| break; |
| } |
| } |
| |
| if (!found_key_to_remove) { |
| // 2. Find the least important id we can remove. |
| for (TabIdList::reverse_iterator riter = visible_ids_.rbegin(); |
| riter != visible_ids_.rend(); |
| riter++) { |
| if (cache_.Get(*riter)) { |
| key_to_remove = *riter; |
| break; |
| found_key_to_remove = true; |
| } |
| } |
| } |
| |
| if (found_key_to_remove) |
| cache_.Remove(key_to_remove); |
| } |
| |
| void ThumbnailCache::RemoveFromReadQueue(TabId tab_id) { |
| TabIdList::iterator read_iter = |
| std::find(read_queue_.begin(), read_queue_.end(), tab_id); |
| if (read_iter != read_queue_.end()) |
| read_queue_.erase(read_iter); |
| } |
| |
| void ThumbnailCache::OnUIResourcesWereEvicted() { |
| if (visible_ids_.empty()) { |
| cache_.Clear(); |
| approximation_cache_.Clear(); |
| } else { |
| TabId last_tab = visible_ids_.front(); |
| std::unique_ptr<Thumbnail> thumbnail = cache_.Remove(last_tab); |
| cache_.Clear(); |
| std::unique_ptr<Thumbnail> approximation = |
| approximation_cache_.Remove(last_tab); |
| approximation_cache_.Clear(); |
| |
| // Keep the thumbnail for app resume if it wasn't uploaded yet. |
| if (thumbnail.get() && !thumbnail->ui_resource_id()) |
| cache_.Put(last_tab, std::move(thumbnail)); |
| if (approximation.get() && !approximation->ui_resource_id()) |
| approximation_cache_.Put(last_tab, std::move(approximation)); |
| } |
| } |
| |
| void ThumbnailCache::InvalidateCachedThumbnail(Thumbnail* thumbnail) { |
| DCHECK(thumbnail); |
| TabId tab_id = thumbnail->tab_id(); |
| cc::UIResourceId uid = thumbnail->ui_resource_id(); |
| |
| Thumbnail* cached_thumbnail = cache_.Get(tab_id); |
| if (cached_thumbnail && cached_thumbnail->ui_resource_id() == uid) |
| cache_.Remove(tab_id); |
| |
| cached_thumbnail = approximation_cache_.Get(tab_id); |
| if (cached_thumbnail && cached_thumbnail->ui_resource_id() == uid) |
| approximation_cache_.Remove(tab_id); |
| } |
| |
| namespace { |
| |
| bool WriteToFile(base::File& file, |
| const gfx::Size& content_size, |
| const float scale, |
| sk_sp<SkPixelRef> compressed_data) { |
| if (!file.IsValid()) |
| return false; |
| |
| if (!WriteBigEndianToFile(file, kCompressedKey)) |
| return false; |
| |
| if (!WriteBigEndianToFile(file, content_size.width())) |
| return false; |
| |
| if (!WriteBigEndianToFile(file, content_size.height())) |
| return false; |
| |
| // Write ETC1 header. |
| unsigned char etc1_buffer[ETC_PKM_HEADER_SIZE]; |
| etc1_pkm_format_header(etc1_buffer, compressed_data->width(), |
| compressed_data->height()); |
| |
| int header_bytes_written = file.WriteAtCurrentPos( |
| reinterpret_cast<char*>(etc1_buffer), ETC_PKM_HEADER_SIZE); |
| if (header_bytes_written != ETC_PKM_HEADER_SIZE) |
| return false; |
| |
| int data_size = etc1_get_encoded_data_size(compressed_data->width(), |
| compressed_data->height()); |
| int pixel_bytes_written = file.WriteAtCurrentPos( |
| reinterpret_cast<char*>(compressed_data->pixels()), |
| data_size); |
| if (pixel_bytes_written != data_size) |
| return false; |
| |
| if (!WriteBigEndianToFile(file, kCurrentExtraVersion)) |
| return false; |
| |
| if (!WriteBigEndianFloatToFile(file, 1.f / scale)) |
| return false; |
| |
| return true; |
| } |
| |
| } // anonymous namespace |
| |
| void ThumbnailCache::WriteTask(TabId tab_id, |
| sk_sp<SkPixelRef> compressed_data, |
| float scale, |
| const gfx::Size& content_size, |
| const base::Callback<void()>& post_write_task) { |
| DCHECK(compressed_data); |
| |
| base::FilePath file_path = GetFilePath(tab_id); |
| |
| base::File file(file_path, |
| base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE); |
| |
| bool success = WriteToFile(file, |
| content_size, |
| scale, |
| compressed_data); |
| |
| file.Close(); |
| |
| if (!success) |
| base::DeleteFile(file_path, false); |
| |
| content::BrowserThread::PostTask( |
| content::BrowserThread::UI, FROM_HERE, post_write_task); |
| } |
| |
| void ThumbnailCache::PostWriteTask() { |
| write_tasks_count_--; |
| } |
| |
| void ThumbnailCache::CompressionTask( |
| SkBitmap raw_data, |
| gfx::Size encoded_size, |
| const base::Callback<void(sk_sp<SkPixelRef>, const gfx::Size&)>& |
| post_compression_task) { |
| sk_sp<SkPixelRef> compressed_data; |
| gfx::Size content_size; |
| |
| if (!raw_data.empty()) { |
| gfx::Size raw_data_size(raw_data.width(), raw_data.height()); |
| size_t pixel_size = 4; // Pixel size is 4 bytes for kARGB_8888_Config. |
| size_t stride = pixel_size * raw_data_size.width(); |
| |
| size_t encoded_bytes = |
| etc1_get_encoded_data_size(encoded_size.width(), encoded_size.height()); |
| SkImageInfo info = SkImageInfo::Make(encoded_size.width(), |
| encoded_size.height(), |
| kUnknown_SkColorType, |
| kUnpremul_SkAlphaType); |
| sk_sp<SkData> etc1_pixel_data(SkData::MakeUninitialized(encoded_bytes)); |
| sk_sp<SkPixelRef> etc1_pixel_ref( |
| SkMallocPixelRef::MakeWithData(info, 0, std::move(etc1_pixel_data))); |
| |
| bool success = etc1_encode_image( |
| reinterpret_cast<unsigned char*>(raw_data.getPixels()), |
| raw_data_size.width(), |
| raw_data_size.height(), |
| pixel_size, |
| stride, |
| reinterpret_cast<unsigned char*>(etc1_pixel_ref->pixels()), |
| encoded_size.width(), |
| encoded_size.height()); |
| etc1_pixel_ref->setImmutable(); |
| |
| if (success) { |
| compressed_data = std::move(etc1_pixel_ref); |
| content_size = raw_data_size; |
| } |
| } |
| |
| content::BrowserThread::PostTask( |
| content::BrowserThread::UI, |
| FROM_HERE, |
| base::Bind(post_compression_task, std::move(compressed_data), |
| content_size)); |
| } |
| |
| void ThumbnailCache::PostCompressionTask( |
| TabId tab_id, |
| const base::Time& time_stamp, |
| float scale, |
| sk_sp<SkPixelRef> compressed_data, |
| const gfx::Size& content_size) { |
| compression_tasks_count_--; |
| if (!compressed_data) { |
| RemoveOnMatchedTimeStamp(tab_id, time_stamp); |
| return; |
| } |
| |
| Thumbnail* thumbnail = cache_.Get(tab_id); |
| if (thumbnail) { |
| if (thumbnail->time_stamp() != time_stamp) |
| return; |
| thumbnail->SetCompressedBitmap(compressed_data, content_size); |
| // Don't upload the texture if we are being paused/stopped because |
| // the context will go away anyways. |
| if (base::android::ApplicationStatusListener::GetState() == |
| base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES) { |
| thumbnail->CreateUIResource(); |
| } |
| } |
| WriteThumbnailIfNecessary(tab_id, std::move(compressed_data), scale, |
| content_size); |
| } |
| |
| namespace { |
| |
| bool ReadFromFile(base::File& file, |
| gfx::Size* out_content_size, |
| float* out_scale, |
| sk_sp<SkPixelRef>* out_pixels) { |
| if (!file.IsValid()) |
| return false; |
| |
| int key = 0; |
| if (!ReadBigEndianFromFile(file, &key)) |
| return false; |
| |
| if (key != kCompressedKey) |
| return false; |
| |
| int content_width = 0; |
| if (!ReadBigEndianFromFile(file, &content_width) || content_width <= 0) |
| return false; |
| |
| int content_height = 0; |
| if (!ReadBigEndianFromFile(file, &content_height) || content_height <= 0) |
| return false; |
| |
| out_content_size->SetSize(content_width, content_height); |
| |
| // Read ETC1 header. |
| int header_bytes_read = 0; |
| unsigned char etc1_buffer[ETC_PKM_HEADER_SIZE]; |
| header_bytes_read = file.ReadAtCurrentPos( |
| reinterpret_cast<char*>(etc1_buffer), |
| ETC_PKM_HEADER_SIZE); |
| if (header_bytes_read != ETC_PKM_HEADER_SIZE) |
| return false; |
| |
| if (!etc1_pkm_is_valid(etc1_buffer)) |
| return false; |
| |
| int raw_width = 0; |
| raw_width = etc1_pkm_get_width(etc1_buffer); |
| if (raw_width <= 0) |
| return false; |
| |
| int raw_height = 0; |
| raw_height = etc1_pkm_get_height(etc1_buffer); |
| if (raw_height <= 0) |
| return false; |
| |
| // Do some simple sanity check validation. We can't have thumbnails larger |
| // than the max display size of the screen. We also can't have etc1 texture |
| // data larger than the next power of 2 up from that. |
| gfx::Size display_size = |
| display::Screen::GetScreen()->GetPrimaryDisplay().GetSizeInPixel(); |
| int max_dimension = std::max(display_size.width(), display_size.height()); |
| |
| if (content_width > max_dimension |
| || content_height > max_dimension |
| || static_cast<size_t>(raw_width) > NextPowerOfTwo(max_dimension) |
| || static_cast<size_t>(raw_height) > NextPowerOfTwo(max_dimension)) { |
| return false; |
| } |
| |
| int data_size = etc1_get_encoded_data_size(raw_width, raw_height); |
| sk_sp<SkData> etc1_pixel_data(SkData::MakeUninitialized(data_size)); |
| |
| int pixel_bytes_read = file.ReadAtCurrentPos( |
| reinterpret_cast<char*>(etc1_pixel_data->writable_data()), |
| data_size); |
| |
| if (pixel_bytes_read != data_size) |
| return false; |
| |
| SkImageInfo info = SkImageInfo::Make(raw_width, |
| raw_height, |
| kUnknown_SkColorType, |
| kUnpremul_SkAlphaType); |
| |
| *out_pixels = |
| SkMallocPixelRef::MakeWithData(info, 0, std::move(etc1_pixel_data)); |
| |
| int extra_data_version = 0; |
| if (!ReadBigEndianFromFile(file, &extra_data_version)) |
| return false; |
| |
| *out_scale = 1.f; |
| if (extra_data_version == 1) { |
| if (!ReadBigEndianFloatFromFile(file, out_scale)) |
| return false; |
| |
| if (*out_scale == 0.f) |
| return false; |
| |
| *out_scale = 1.f / *out_scale; |
| } |
| |
| return true; |
| } |
| |
| }// anonymous namespace |
| |
| void ThumbnailCache::ReadTask( |
| bool decompress, |
| TabId tab_id, |
| const base::Callback< |
| void(sk_sp<SkPixelRef>, float, const gfx::Size&)>& |
| post_read_task) { |
| gfx::Size content_size; |
| float scale = 0.f; |
| sk_sp<SkPixelRef> compressed_data; |
| base::FilePath file_path = GetFilePath(tab_id); |
| |
| if (base::PathExists(file_path)) { |
| base::File file(file_path, base::File::FLAG_OPEN | base::File::FLAG_READ); |
| |
| |
| bool valid_contents = ReadFromFile(file, |
| &content_size, |
| &scale, |
| &compressed_data); |
| file.Close(); |
| |
| if (!valid_contents) { |
| content_size.SetSize(0, 0); |
| scale = 0.f; |
| compressed_data.reset(); |
| base::DeleteFile(file_path, false); |
| } |
| } |
| |
| if (decompress) { |
| base::PostTaskWithTraits( |
| FROM_HERE, {base::TaskPriority::BACKGROUND}, |
| base::Bind(post_read_task, std::move(compressed_data), scale, |
| content_size)); |
| } else { |
| content::BrowserThread::PostTask( |
| content::BrowserThread::UI, |
| FROM_HERE, |
| base::Bind(post_read_task, std::move(compressed_data), scale, |
| content_size)); |
| } |
| } |
| |
| void ThumbnailCache::PostReadTask(TabId tab_id, |
| sk_sp<SkPixelRef> compressed_data, |
| float scale, |
| const gfx::Size& content_size) { |
| read_in_progress_ = false; |
| |
| TabIdList::iterator iter = |
| std::find(read_queue_.begin(), read_queue_.end(), tab_id); |
| if (iter == read_queue_.end()) { |
| ReadNextThumbnail(); |
| return; |
| } |
| |
| read_queue_.erase(iter); |
| |
| if (!cache_.Get(tab_id) && compressed_data) { |
| ThumbnailMetaDataMap::iterator meta_iter = |
| thumbnail_meta_data_.find(tab_id); |
| base::Time time_stamp = base::Time::Now(); |
| if (meta_iter != thumbnail_meta_data_.end()) |
| time_stamp = meta_iter->second.capture_time(); |
| |
| MakeSpaceForNewItemIfNecessary(tab_id); |
| std::unique_ptr<Thumbnail> thumbnail = Thumbnail::Create( |
| tab_id, time_stamp, scale, ui_resource_provider_, this); |
| thumbnail->SetCompressedBitmap(std::move(compressed_data), |
| content_size); |
| if (kPreferCPUMemory) |
| thumbnail->CreateUIResource(); |
| |
| cache_.Put(tab_id, std::move(thumbnail)); |
| NotifyObserversOfThumbnailRead(tab_id); |
| } |
| |
| ReadNextThumbnail(); |
| } |
| |
| void ThumbnailCache::NotifyObserversOfThumbnailRead(TabId tab_id) { |
| for (ThumbnailCacheObserver& observer : observers_) |
| observer.OnFinishedThumbnailRead(tab_id); |
| } |
| |
| void ThumbnailCache::RemoveOnMatchedTimeStamp(TabId tab_id, |
| const base::Time& time_stamp) { |
| // We remove the cached version if it matches the tab_id and the time_stamp. |
| Thumbnail* thumbnail = cache_.Get(tab_id); |
| Thumbnail* approx_thumbnail = approximation_cache_.Get(tab_id); |
| if ((thumbnail && thumbnail->time_stamp() == time_stamp) || |
| (approx_thumbnail && approx_thumbnail->time_stamp() == time_stamp)) { |
| Remove(tab_id); |
| } |
| return; |
| } |
| |
| void ThumbnailCache::DecompressionTask( |
| const base::Callback<void(bool, SkBitmap)>& |
| post_decompression_callback, |
| sk_sp<SkPixelRef> compressed_data, |
| float scale, |
| const gfx::Size& content_size) { |
| SkBitmap raw_data_small; |
| bool success = false; |
| |
| if (compressed_data.get()) { |
| gfx::Size buffer_size = |
| gfx::Size(compressed_data->width(), compressed_data->height()); |
| |
| SkBitmap raw_data; |
| raw_data.allocPixels(SkImageInfo::Make(buffer_size.width(), |
| buffer_size.height(), |
| kRGBA_8888_SkColorType, |
| kOpaque_SkAlphaType)); |
| success = etc1_decode_image( |
| reinterpret_cast<unsigned char*>(compressed_data->pixels()), |
| reinterpret_cast<unsigned char*>(raw_data.getPixels()), |
| buffer_size.width(), |
| buffer_size.height(), |
| raw_data.bytesPerPixel(), |
| raw_data.rowBytes()); |
| raw_data.setImmutable(); |
| |
| if (!success) { |
| // Leave raw_data_small empty for consistency with other failure modes. |
| } else if (content_size == buffer_size) { |
| // Shallow copy the pixel reference. |
| raw_data_small = raw_data; |
| } else { |
| // The content size is smaller than the buffer size (likely because of |
| // a power-of-two rounding), so deep copy the bitmap. |
| raw_data_small.allocPixels(SkImageInfo::Make(content_size.width(), |
| content_size.height(), |
| kRGBA_8888_SkColorType, |
| kOpaque_SkAlphaType)); |
| SkCanvas small_canvas(raw_data_small); |
| small_canvas.drawBitmap(raw_data, 0, 0); |
| raw_data_small.setImmutable(); |
| } |
| } |
| |
| content::BrowserThread::PostTask( |
| content::BrowserThread::UI, |
| FROM_HERE, |
| base::Bind(post_decompression_callback, success, raw_data_small)); |
| } |
| |
| ThumbnailCache::ThumbnailMetaData::ThumbnailMetaData() { |
| } |
| |
| ThumbnailCache::ThumbnailMetaData::ThumbnailMetaData( |
| const base::Time& current_time, |
| const GURL& url) |
| : capture_time_(current_time), url_(url) { |
| } |
| |
| std::pair<SkBitmap, float> ThumbnailCache::CreateApproximation( |
| const SkBitmap& bitmap, |
| float scale) { |
| DCHECK(!bitmap.empty()); |
| DCHECK_GT(scale, 0); |
| float new_scale = 1.f / kApproximationScaleFactor; |
| |
| gfx::Size dst_size = gfx::ScaleToFlooredSize( |
| gfx::Size(bitmap.width(), bitmap.height()), new_scale); |
| SkBitmap dst_bitmap; |
| dst_bitmap.allocPixels(SkImageInfo::Make(dst_size.width(), |
| dst_size.height(), |
| bitmap.info().colorType(), |
| bitmap.info().alphaType())); |
| dst_bitmap.eraseColor(0); |
| SkCanvas canvas(dst_bitmap); |
| canvas.scale(new_scale, new_scale); |
| canvas.drawBitmap(bitmap, 0, 0, NULL); |
| dst_bitmap.setImmutable(); |
| |
| return std::make_pair(dst_bitmap, new_scale * scale); |
| } |
| |
| void ThumbnailCache::OnMemoryPressure( |
| base::MemoryPressureListener::MemoryPressureLevel level) { |
| if (level == base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL) { |
| cache_.Clear(); |
| approximation_cache_.Clear(); |
| } |
| } |
