cc/resources/pixel_buffer_raster_worker_pool.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
   6 #define CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
   7
   8 #include <deque>
   9 #include <vector>
  10
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/values.h"
  13 #include "cc/base/delayed_unique_notifier.h"
  14 #include "cc/resources/raster_worker_pool.h"
  15 #include "cc/resources/rasterizer.h"
  16
  17 namespace cc {
  18 class ResourceProvider;
  19
  20 class CC_EXPORT PixelBufferRasterWorkerPool : public RasterWorkerPool,
  21                                               public Rasterizer,
  22                                               public RasterizerTaskClient {
  23  public:
  24   virtual ~PixelBufferRasterWorkerPool();
  25
  26   static scoped_ptr<RasterWorkerPool> Create(
  27       base::SequencedTaskRunner* task_runner,
  28       TaskGraphRunner* task_graph_runner,
  29       ResourceProvider* resource_provider,
  30       size_t max_transfer_buffer_usage_bytes);
  31
  32   // Overridden from RasterWorkerPool:
  33   virtual Rasterizer* AsRasterizer() OVERRIDE;
  34
  35   // Overridden from Rasterizer:
  36   virtual void SetClient(RasterizerClient* client) OVERRIDE;
  37   virtual void Shutdown() OVERRIDE;
  38   virtual void ScheduleTasks(RasterTaskQueue* queue) OVERRIDE;
  39   virtual void CheckForCompletedTasks() OVERRIDE;
  40
  41   // Overridden from RasterizerTaskClient:
  42   virtual SkCanvas* AcquireCanvasForRaster(RasterTask* task) OVERRIDE;
  43   virtual void ReleaseCanvasForRaster(RasterTask* task) OVERRIDE;
  44
  45  private:
  46   struct RasterTaskState {
  47     class TaskComparator {
  48      public:
  49       explicit TaskComparator(const RasterTask* task) : task_(task) {}
  50
  51       bool operator()(const RasterTaskState& state) const {
  52         return state.task == task_;
  53       }
  54
  55      private:
  56       const RasterTask* task_;
  57     };
  58
  59     typedef std::vector<RasterTaskState> Vector;
  60
  61     RasterTaskState(RasterTask* task, bool required_for_activation)
  62         : type(UNSCHEDULED),
  63           task(task),
  64           required_for_activation(required_for_activation) {}
  65
  66     enum { UNSCHEDULED, SCHEDULED, UPLOADING, COMPLETED } type;
  67     RasterTask* task;
  68     bool required_for_activation;
  69   };
  70
  71   typedef std::deque<scoped_refptr<RasterTask> > RasterTaskDeque;
  72
  73   PixelBufferRasterWorkerPool(base::SequencedTaskRunner* task_runner,
  74                               TaskGraphRunner* task_graph_runner,
  75                               ResourceProvider* resource_provider,
  76                               size_t max_transfer_buffer_usage_bytes);
  77
  78   void OnRasterFinished();
  79   void OnRasterRequiredForActivationFinished();
  80   void FlushUploads();
  81   void CheckForCompletedUploads();
  82   void CheckForCompletedRasterTasks();
  83   void ScheduleMoreTasks();
  84   unsigned PendingRasterTaskCount() const;
  85   bool HasPendingTasks() const;
  86   bool HasPendingTasksRequiredForActivation() const;
  87   void CheckForCompletedRasterizerTasks();
  88
  89   const char* StateName() const;
  90   scoped_ptr<base::Value> StateAsValue() const;
  91   scoped_ptr<base::Value> ThrottleStateAsValue() const;
  92
  93   scoped_refptr<base::SequencedTaskRunner> task_runner_;
  94   TaskGraphRunner* task_graph_runner_;
  95   const NamespaceToken namespace_token_;
  96   RasterizerClient* client_;
  97   ResourceProvider* resource_provider_;
  98
  99   bool shutdown_;
 100
 101   RasterTaskQueue raster_tasks_;
 102   RasterTaskState::Vector raster_task_states_;
 103   RasterTaskDeque raster_tasks_with_pending_upload_;
 104   RasterTask::Vector completed_raster_tasks_;
 105   RasterizerTask::Vector completed_image_decode_tasks_;
 106
 107   size_t scheduled_raster_task_count_;
 108   size_t raster_tasks_required_for_activation_count_;
 109   size_t bytes_pending_upload_;
 110   size_t max_bytes_pending_upload_;
 111   bool has_performed_uploads_since_last_flush_;
 112
 113   bool should_notify_client_if_no_tasks_are_pending_;
 114   bool should_notify_client_if_no_tasks_required_for_activation_are_pending_;
 115   bool raster_finished_task_pending_;
 116   bool raster_required_for_activation_finished_task_pending_;
 117
 118   DelayedUniqueNotifier check_for_completed_raster_task_notifier_;
 119
 120   base::WeakPtrFactory<PixelBufferRasterWorkerPool>
 121       raster_finished_weak_ptr_factory_;
 122
 123   scoped_refptr<RasterizerTask> raster_finished_task_;
 124   scoped_refptr<RasterizerTask> raster_required_for_activation_finished_task_;
 125
 126   // Task graph used when scheduling tasks and vector used to gather
 127   // completed tasks.
 128   TaskGraph graph_;
 129   Task::Vector completed_tasks_;
 130
 131   DISALLOW_COPY_AND_ASSIGN(PixelBufferRasterWorkerPool);
 132 };
 133
 134 }  // namespace cc
 135
 136 #endif  // CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_