tile_manager.h | Explore in Territory

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_TILES_TILE_MANAGER_H_
#define CC_TILES_TILE_MANAGER_H_

#include <stddef.h>
#include <stdint.h>

#include <memory>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/rand_util.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/sequenced_task_runner.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/memory_dump_provider.h"
#include "cc/base/unique_notifier.h"
#include "cc/paint/target_color_params.h"
#include "cc/raster/raster_buffer_provider.h"
#include "cc/raster/raster_query_queue.h"
#include "cc/raster/raster_source.h"
#include "cc/resources/memory_history.h"
#include "cc/resources/resource_pool.h"
#include "cc/tiles/checker_image_tracker.h"
#include "cc/tiles/decoded_image_tracker.h"
#include "cc/tiles/eviction_tile_priority_queue.h"
#include "cc/tiles/image_controller.h"
#include "cc/tiles/raster_tile_priority_queue.h"
#include "cc/tiles/tile.h"
#include "cc/tiles/tile_draw_info.h"
#include "cc/tiles/tile_manager_settings.h"
#include "cc/tiles/tile_task_manager.h"
#include "gpu/command_buffer/client/client_shared_image.h"
#include "ui/gfx/display_color_spaces.h"
#include "url/gurl.h"

namespace base {
namespace trace_event {
class ConvertableToTraceFormat;
class TracedValue;
}
}

namespace cc {
class ImageDecodeCache;
class TilesWithResourceIterator;

class CC_EXPORT TileManagerClient { … };

struct RasterTaskCompletionStats { … };
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
RasterTaskCompletionStatsAsValue(const RasterTaskCompletionStats& stats);

// This class manages tiles, deciding which should get rasterized and which
// should no longer have any memory assigned to them. Tile objects are "owned"
// by layers; they automatically register with the manager when they are
// created, and unregister from the manager when they are deleted.
//
// The TileManager coordinates scheduling of prioritized raster and decode work
// across 2 different subsystems, namely the TaskGraphRunner used primarily for
// raster work and images which must be decoded before rasterization of a tile
// can proceed, and the CheckerImageTracker used for images decoded
// asynchronously from raster using the |image_worker_task_runner|. The order in
// which work is scheduled across these systems is as follows:
//
// 1) RequiredForActivation/Draw Tiles: These are the highest priority tiles
// which block scheduling of any decode work for checkered-images.
//
// 2) Pre-paint Tiles: These are offscreen tiles which fall within the
// pre-raster distance. The work for these tiles continues in parallel with the
// decode work for checkered images from visible/pre-paint tiles.
//
// 3) Pre-decode Tiles: These are offscreen tiles which are outside the
// pre-raster distance but have their images pre-decoded and locked. Finishing
// work for these tiles on the TaskGraph blocks starting decode work for
// checker-imaged pre-decode tiles.

class CC_EXPORT TileManager : CheckerImageTrackerClient,
                              public base::trace_event::MemoryDumpProvider { … };

}  // namespace cc

#endif  // CC_TILES_TILE_MANAGER_H_
chromium/cc/tiles/tile_manager.h
