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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/rendering_stats.h"
#include "cc/resource_pool.h"
#include "cc/tile_priority.h"
namespace cc {
class RasterWorkerPool;
class ResourceProvider;
class Tile;
class TileVersion;
class CC_EXPORT TileManagerClient {
public:
virtual void ScheduleManageTiles() = 0;
virtual void DidUploadVisibleHighResolutionTile() = 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;
// 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 CheckForCompletedTextures();
void GetMemoryStats(size_t* memoryRequiredBytes,
size_t* memoryNiceToHaveBytes,
size_t* memoryUsedBytes);
void GetRenderingStats(RenderingStats* stats);
protected:
// Methods called by Tile
friend class Tile;
void RegisterTile(Tile* tile);
void UnregisterTile(Tile* tile);
void WillModifyTilePriority(
Tile* tile, WhichTree tree, const TilePriority& new_priority);
private:
void SortTiles();
void AssignGpuMemoryToTiles();
void FreeResourcesForTile(Tile* tile);
void ScheduleManageTiles();
void DispatchMoreTasks();
void GatherPixelRefsForTile(Tile* tile);
void DispatchImageDecodeTasksForTile(Tile* tile);
void DispatchOneImageDecodeTask(
scoped_refptr<Tile> tile, skia::LazyPixelRef* pixel_ref);
void OnImageDecodeTaskCompleted(
scoped_refptr<Tile> tile, uint32_t pixel_ref_id);
void DispatchOneRasterTask(scoped_refptr<Tile> tile);
void OnRasterTaskCompleted(
scoped_refptr<Tile> tile,
scoped_ptr<ResourcePool::Resource> resource,
int manage_tiles_call_count_when_dispatched);
void DidFinishTileInitialization(Tile* tile);
TileManagerClient* client_;
scoped_ptr<ResourcePool> resource_pool_;
scoped_ptr<RasterWorkerPool> raster_worker_pool_;
bool manage_tiles_pending_;
int manage_tiles_call_count_;
GlobalStateThatImpactsTilePriority global_state_;
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_;
RenderingStats rendering_stats_;
DISALLOW_COPY_AND_ASSIGN(TileManager);
};
} // namespace cc
#endif // CC_TILE_MANAGER_H_
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