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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_RASTER_WORKER_POOL_H_
#define CC_RESOURCES_RASTER_WORKER_POOL_H_
#include "cc/resources/rasterizer.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
namespace base {
class SequencedTaskRunner;
}
namespace cc {
class RasterSource;
class RenderingStatsInstrumentation;
class CC_EXPORT RasterWorkerPool {
public:
static unsigned kBenchmarkRasterTaskPriority;
static unsigned kRasterFinishedTaskPriority;
static unsigned kRasterTaskPriorityBase;
RasterWorkerPool();
virtual ~RasterWorkerPool();
// Set the number of threads to use for the global TaskGraphRunner instance.
// This can only be called once and must be called prior to
// GetNumRasterThreads().
static void SetNumRasterThreads(int num_threads);
// Returns the number of threads used for the global TaskGraphRunner instance.
static int GetNumRasterThreads();
// Returns a pointer to the global TaskGraphRunner instance.
static TaskGraphRunner* GetTaskGraphRunner();
// Utility function that can be used to create a "raster finished" task that
// posts |callback| to |task_runner| when run.
static scoped_refptr<RasterizerTask> CreateRasterFinishedTask(
base::SequencedTaskRunner* task_runner,
const base::Closure& callback);
// Utility function that can be used to call ::ScheduleOnOriginThread() for
// each task in |graph|.
static void ScheduleTasksOnOriginThread(RasterizerTaskClient* client,
TaskGraph* graph);
// Utility function that can be used to build a task graph. Inserts a node
// that represents |task| in |graph|. See TaskGraph definition for valid
// |priority| values.
static void InsertNodeForTask(TaskGraph* graph,
RasterizerTask* task,
unsigned priority,
size_t dependencies);
// Utility function that can be used to build a task graph. Inserts nodes that
// represent |task| and all its image decode dependencies in |graph|.
static void InsertNodesForRasterTask(
TaskGraph* graph,
RasterTask* task,
const ImageDecodeTask::Vector& decode_tasks,
unsigned priority);
// Utility function that will create a temporary bitmap and copy pixels to
// |memory| when necessary.
static void PlaybackToMemory(void* memory,
ResourceFormat format,
const gfx::Size& size,
int stride,
const RasterSource* raster_source,
const gfx::Rect& rect,
float scale);
// Type-checking downcast routine.
virtual Rasterizer* AsRasterizer() = 0;
};
} // namespace cc
#endif // CC_RESOURCES_RASTER_WORKER_POOL_H_
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