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// Copyright 2012 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 CC_TILE_MANAGER_H_
#define CC_TILE_MANAGER_H_
#include <list>
#include <queue>
#include <vector>
#include "base/hash_tables.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
#include "cc/resource_pool.h"
#include "cc/tile_priority.h"
namespace cc {
class RasterThread;
class ResourceProvider;
class Tile;
class TileVersion;
struct RenderingStats;
class CC_EXPORT TileManagerClient {
public:
virtual void ScheduleManageTiles() = 0;
virtual void ScheduleCheckForCompletedSetPixels() = 0;
protected:
virtual ~TileManagerClient() {}
};
// Tile manager classifying tiles into a few basic
// bins:
enum TileManagerBin {
NOW_BIN = 0, // Needed ASAP.
SOON_BIN = 1, // Impl-side version of prepainting.
EVENTUALLY_BIN = 2, // Nice to have, if we've got memory and time.
NEVER_BIN = 3, // Dont bother.
NUM_BINS = 4
};
// This is state that is specific to a tile that is
// managed by the TileManager.
class CC_EXPORT ManagedTileState {
public:
ManagedTileState();
~ManagedTileState();
// Persisted state: valid all the time.
bool can_use_gpu_memory;
bool can_be_freed;
scoped_ptr<ResourcePool::Resource> resource;
bool resource_is_being_initialized;
bool contents_swizzled;
bool need_to_gather_pixel_refs;
std::list<skia::LazyPixelRef*> pending_pixel_refs;
// Ephemeral state, valid only during Manage.
TileManagerBin bin[NUM_TREES];
// Bin used to determine raster priority.
TileManagerBin raster_bin;
// The bin that the tile would have if the GPU memory manager had a maximally permissive policy,
// send to the GPU memory manager to determine policy.
TileManagerBin gpu_memmgr_stats_bin;
TileResolution resolution;
float time_to_needed_in_seconds;
};
// 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.
class CC_EXPORT TileManager {
public:
TileManager(TileManagerClient* client,
ResourceProvider *resource_provider,
size_t num_raster_threads);
virtual ~TileManager();
const GlobalStateThatImpactsTilePriority& GlobalState() const { return global_state_; }
void SetGlobalState(const GlobalStateThatImpactsTilePriority& state);
void ManageTiles();
void CheckForCompletedSetPixels();
void GetMemoryStats(size_t* memoryRequiredBytes,
size_t* memoryNiceToHaveBytes,
size_t* memoryUsedBytes);
void GetRenderingStats(RenderingStats* stats);
int GetTilesInBinCount(TileManagerBin bin, WhichTree tree);
int GetDrawableTilesInBinCount(TileManagerBin bin, WhichTree tree);
protected:
// Methods called by Tile
friend class Tile;
void RegisterTile(Tile*);
void UnregisterTile(Tile*);
void WillModifyTilePriority(Tile*, WhichTree, const TilePriority& new_priority);
private:
void ResetBinCounts();
void AssignGpuMemoryToTiles();
void FreeResourcesForTile(Tile*);
void ScheduleManageTiles();
void ScheduleCheckForCompletedSetPixels();
void DispatchMoreTasks();
void DispatchOneRasterTask(RasterThread*, scoped_refptr<Tile>);
void OnRasterTaskCompleted(
scoped_refptr<Tile>,
scoped_ptr<ResourcePool::Resource>,
scoped_refptr<PicturePileImpl>,
int manage_tiles_call_count_when_dispatched,
RenderingStats*);
void DidFinishTileInitialization(Tile*);
void DispatchImageDecodingTasksForTile(Tile*);
void OnImageDecodingTaskCompleted(scoped_refptr<Tile>,
uint32_t,
RenderingStats*);
void DispatchOneImageDecodingTask(
RasterThread*, scoped_refptr<Tile>, skia::LazyPixelRef*);
void GatherPixelRefsForTile(Tile*);
RasterThread* GetFreeRasterThread();
TileManagerClient* client_;
scoped_ptr<ResourcePool> resource_pool_;
bool manage_tiles_pending_;
int manage_tiles_call_count_;
bool check_for_completed_set_pixels_pending_;
GlobalStateThatImpactsTilePriority global_state_;
int tiles_in_bin_count_[NUM_BINS][NUM_TREES];
int drawable_tiles_in_bin_count_[NUM_BINS][NUM_TREES];
typedef std::vector<Tile*> TileVector;
TileVector tiles_;
TileVector tiles_that_need_to_be_rasterized_;
typedef std::list<Tile*> TileList;
// Tiles with image decoding tasks. These tiles need to be rasterized
// when all the image decoding tasks finish.
TileList tiles_with_image_decoding_tasks_;
typedef base::hash_map<uint32_t, skia::LazyPixelRef*> PixelRefMap;
PixelRefMap pending_decode_tasks_;
typedef std::queue<scoped_refptr<Tile> > TileQueue;
TileQueue tiles_with_pending_set_pixels_;
typedef ScopedPtrVector<RasterThread> RasterThreadVector;
RasterThreadVector raster_threads_;
RenderingStats rendering_stats_;
DISALLOW_COPY_AND_ASSIGN(TileManager);
};
} // namespace cc
#endif // CC_TILE_MANAGER_H_
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