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// Copyright 2014 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_RASTER_TILE_TASK_RUNNER_H_
#define CC_RASTER_TILE_TASK_RUNNER_H_
#include <stdint.h>
#include <vector>
#include "base/callback.h"
#include "cc/raster/task_graph_runner.h"
#include "cc/resources/resource_format.h"
namespace cc {
class ImageDecodeTask;
class RasterTask;
class Resource;
class RasterBuffer;
class CC_EXPORT TileTaskClient {
public:
virtual scoped_ptr<RasterBuffer> AcquireBufferForRaster(
const Resource* resource,
uint64_t resource_content_id,
uint64_t previous_content_id) = 0;
virtual void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) = 0;
protected:
virtual ~TileTaskClient() {}
};
class CC_EXPORT TileTask : public Task {
public:
typedef std::vector<scoped_refptr<TileTask>> Vector;
virtual void ScheduleOnOriginThread(TileTaskClient* client) = 0;
virtual void CompleteOnOriginThread(TileTaskClient* client) = 0;
void WillSchedule();
void DidSchedule();
bool HasBeenScheduled() const;
void WillComplete();
void DidComplete();
bool HasCompleted() const;
protected:
TileTask();
~TileTask() override;
bool did_schedule_;
bool did_complete_;
};
class CC_EXPORT ImageDecodeTask : public TileTask {
public:
typedef std::vector<scoped_refptr<ImageDecodeTask>> Vector;
protected:
ImageDecodeTask();
~ImageDecodeTask() override;
};
class CC_EXPORT RasterTask : public TileTask {
public:
typedef std::vector<scoped_refptr<RasterTask>> Vector;
const ImageDecodeTask::Vector& dependencies() const { return dependencies_; }
protected:
explicit RasterTask(ImageDecodeTask::Vector* dependencies);
~RasterTask() override;
private:
ImageDecodeTask::Vector dependencies_;
};
// This interface can be used to schedule and run tile tasks.
// The client can call CheckForCompletedTasks() at any time to dispatch
// pending completion callbacks for all tasks that have finished running.
class CC_EXPORT TileTaskRunner {
public:
// Tells the worker pool to shutdown after canceling all previously scheduled
// tasks. Reply callbacks are still guaranteed to run when
// CheckForCompletedTasks() is called.
virtual void Shutdown() = 0;
// Schedule running of tile tasks in |graph| and all dependencies.
// Previously scheduled tasks that are not in |graph| will be canceled unless
// already running. Once scheduled, reply callbacks are guaranteed to run for
// all tasks even if they later get canceled by another call to
// ScheduleTasks().
virtual void ScheduleTasks(TaskGraph* graph) = 0;
// Check for completed tasks and dispatch reply callbacks.
virtual void CheckForCompletedTasks() = 0;
// Returns the format to use for the tiles.
virtual ResourceFormat GetResourceFormat(bool must_support_alpha) const = 0;
// Determine if the resource requires swizzling.
virtual bool GetResourceRequiresSwizzle(bool must_support_alpha) const = 0;
protected:
// Check if resource format matches output format.
static bool ResourceFormatRequiresSwizzle(ResourceFormat format);
virtual ~TileTaskRunner() {}
};
} // namespace cc
#endif // CC_RASTER_TILE_TASK_RUNNER_H_
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