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// Copyright 2013 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_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
#define CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
#include <deque>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "base/values.h"
#include "cc/base/delayed_unique_notifier.h"
#include "cc/resources/raster_worker_pool.h"
#include "cc/resources/rasterizer.h"
namespace cc {
class ResourceProvider;
class CC_EXPORT PixelBufferRasterWorkerPool : public RasterWorkerPool,
public Rasterizer,
public RasterizerTaskClient {
public:
virtual ~PixelBufferRasterWorkerPool();
static scoped_ptr<RasterWorkerPool> Create(
base::SequencedTaskRunner* task_runner,
TaskGraphRunner* task_graph_runner,
ResourceProvider* resource_provider,
size_t max_transfer_buffer_usage_bytes);
// Overridden from RasterWorkerPool:
virtual Rasterizer* AsRasterizer() OVERRIDE;
// Overridden from Rasterizer:
virtual void SetClient(RasterizerClient* client) OVERRIDE;
virtual void Shutdown() OVERRIDE;
virtual void ScheduleTasks(RasterTaskQueue* queue) OVERRIDE;
virtual void CheckForCompletedTasks() OVERRIDE;
// Overridden from RasterizerTaskClient:
virtual SkCanvas* AcquireCanvasForRaster(RasterTask* task) OVERRIDE;
virtual void ReleaseCanvasForRaster(RasterTask* task) OVERRIDE;
private:
struct RasterTaskState {
class TaskComparator {
public:
explicit TaskComparator(const RasterTask* task) : task_(task) {}
bool operator()(const RasterTaskState& state) const {
return state.task == task_;
}
private:
const RasterTask* task_;
};
typedef std::vector<RasterTaskState> Vector;
RasterTaskState(RasterTask* task, bool required_for_activation)
: type(UNSCHEDULED),
task(task),
required_for_activation(required_for_activation) {}
enum { UNSCHEDULED, SCHEDULED, UPLOADING, COMPLETED } type;
RasterTask* task;
bool required_for_activation;
};
typedef std::deque<scoped_refptr<RasterTask> > RasterTaskDeque;
PixelBufferRasterWorkerPool(base::SequencedTaskRunner* task_runner,
TaskGraphRunner* task_graph_runner,
ResourceProvider* resource_provider,
size_t max_transfer_buffer_usage_bytes);
void OnRasterFinished();
void OnRasterRequiredForActivationFinished();
void FlushUploads();
void CheckForCompletedUploads();
void CheckForCompletedRasterTasks();
void ScheduleMoreTasks();
unsigned PendingRasterTaskCount() const;
bool HasPendingTasks() const;
bool HasPendingTasksRequiredForActivation() const;
void CheckForCompletedRasterizerTasks();
const char* StateName() const;
scoped_ptr<base::Value> StateAsValue() const;
scoped_ptr<base::Value> ThrottleStateAsValue() const;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
TaskGraphRunner* task_graph_runner_;
const NamespaceToken namespace_token_;
RasterizerClient* client_;
ResourceProvider* resource_provider_;
bool shutdown_;
RasterTaskQueue raster_tasks_;
RasterTaskState::Vector raster_task_states_;
RasterTaskDeque raster_tasks_with_pending_upload_;
RasterTask::Vector completed_raster_tasks_;
RasterizerTask::Vector completed_image_decode_tasks_;
size_t scheduled_raster_task_count_;
size_t raster_tasks_required_for_activation_count_;
size_t bytes_pending_upload_;
size_t max_bytes_pending_upload_;
bool has_performed_uploads_since_last_flush_;
bool should_notify_client_if_no_tasks_are_pending_;
bool should_notify_client_if_no_tasks_required_for_activation_are_pending_;
bool raster_finished_task_pending_;
bool raster_required_for_activation_finished_task_pending_;
DelayedUniqueNotifier check_for_completed_raster_task_notifier_;
base::WeakPtrFactory<PixelBufferRasterWorkerPool>
raster_finished_weak_ptr_factory_;
scoped_refptr<RasterizerTask> raster_finished_task_;
scoped_refptr<RasterizerTask> raster_required_for_activation_finished_task_;
// Task graph used when scheduling tasks and vector used to gather
// completed tasks.
TaskGraph graph_;
Task::Vector completed_tasks_;
DISALLOW_COPY_AND_ASSIGN(PixelBufferRasterWorkerPool);
};
} // namespace cc
#endif // CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
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