cc/raster/tile_task_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_RASTER_TILE_TASK_WORKER_POOL_H_
   6 #define CC_RASTER_TILE_TASK_WORKER_POOL_H_
   7
   8 #include "cc/raster/tile_task_runner.h"
   9 #include "ui/gfx/geometry/rect.h"
  10 #include "ui/gfx/geometry/size.h"
  11
  12 namespace base {
  13 class SequencedTaskRunner;
  14 }
  15
  16 namespace cc {
  17 class RasterSource;
  18 class RenderingStatsInstrumentation;
  19
  20 class CC_EXPORT TileTaskWorkerPool {
  21  public:
  22   static size_t kBenchmarkTaskPriority;
  23   static size_t kTaskSetFinishedTaskPriorityBase;
  24   static size_t kTileTaskPriorityBase;
  25
  26   TileTaskWorkerPool();
  27   virtual ~TileTaskWorkerPool();
  28
  29   // Utility function that can be used to create a "Task set finished" task that
  30   // posts |callback| to |task_runner| when run.
  31   static scoped_refptr<TileTask> CreateTaskSetFinishedTask(
  32       base::SequencedTaskRunner* task_runner,
  33       const base::Closure& callback);
  34
  35   // Utility function that can be used to call ::ScheduleOnOriginThread() for
  36   // each task in |graph|.
  37   static void ScheduleTasksOnOriginThread(TileTaskClient* client,
  38                                           TaskGraph* graph);
  39
  40   // Utility function that can be used to build a task graph. Inserts a node
  41   // that represents |task| in |graph|. See TaskGraph definition for valid
  42   // |priority| values.
  43   static void InsertNodeForTask(TaskGraph* graph,
  44                                 TileTask* task,
  45                                 size_t priority,
  46                                 size_t dependencies);
  47
  48   // Utility function that can be used to build a task graph. Inserts nodes that
  49   // represent |task| and all its image decode dependencies in |graph|.
  50   static void InsertNodesForRasterTask(
  51       TaskGraph* graph,
  52       RasterTask* task,
  53       const ImageDecodeTask::Vector& decode_tasks,
  54       size_t priority);
  55
  56   // Utility function that will create a temporary bitmap and copy pixels to
  57   // |memory| when necessary. The |canvas_bitmap_rect| is the rect of the bitmap
  58   // being played back in the pixel space of the source, ie a rect in the source
  59   // that will cover the resulting |memory|. The |canvas_playback_rect| can be a
  60   // smaller contained rect inside the |canvas_bitmap_rect| if the |memory| is
  61   // already partially complete, and only the subrect needs to be played back.
  62   static void PlaybackToMemory(void* memory,
  63                                ResourceFormat format,
  64                                const gfx::Size& size,
  65                                size_t stride,
  66                                const RasterSource* raster_source,
  67                                const gfx::Rect& canvas_bitmap_rect,
  68                                const gfx::Rect& canvas_playback_rect,
  69                                float scale);
  70
  71   // Type-checking downcast routine.
  72   virtual TileTaskRunner* AsTileTaskRunner() = 0;
  73 };
  74
  75 }  // namespace cc
  76
  77 #endif  // CC_RASTER_TILE_TASK_WORKER_POOL_H_