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// Copyright 2014 The Chromium Authors
// 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_H_
#define CC_RASTER_TILE_TASK_H_
#include <vector>
#include "cc/raster/task.h"
namespace cc {
class CC_EXPORT TileTask : public Task {
public:
typedef std::vector<scoped_refptr<TileTask>> Vector;
const TileTask::Vector& dependencies() const { return dependencies_; }
// `dependent` depends on `this`. A task may have at most one external
// dependent.
void SetExternalDependent(scoped_refptr<TileTask> dependent);
scoped_refptr<TileTask>& external_dependent() { return external_dependent_; }
// Called when an external task on which `this` depends has completed.
// A task may have at most one external dependency, and may not mix internal
// and external dependencies.
void ExternalDependencyCompleted();
// Indicates whether this TileTask can be run at the same time as other tasks
// in the task graph. If false, this task will be scheduled with
// TASK_CATEGORY_NONCONCURRENT_FOREGROUND. See comments in task_category.h.
bool supports_concurrent_execution() const {
return supports_concurrent_execution_ == SupportsConcurrentExecution::kYes;
}
// Indicates whether this TileTask can run at background thread priority. See
// comments in task_category.h.
bool supports_background_thread_priority() const {
return supports_background_thread_priority_ ==
SupportsBackgroundThreadPriority::kYes;
}
virtual bool IsRasterTask() const;
// This function should be called from origin thread to process the completion
// of the task.
virtual void OnTaskCompleted() = 0;
// This method should report true if the task contains image decodes that
// might be for LCP candidates.
virtual bool TaskContainsLCPCandidateImages() const;
void DidComplete();
bool HasCompleted() const;
protected:
enum class SupportsConcurrentExecution { kYes, kNo };
enum class SupportsBackgroundThreadPriority { kYes, kNo };
TileTask(SupportsConcurrentExecution supports_concurrent_execution,
SupportsBackgroundThreadPriority supports_background_thread_priority,
TileTask::Vector* dependencies = nullptr);
~TileTask() override;
const SupportsConcurrentExecution supports_concurrent_execution_;
const SupportsBackgroundThreadPriority supports_background_thread_priority_;
TileTask::Vector dependencies_;
// External task that depends on `this`.
scoped_refptr<TileTask> external_dependent_;
bool did_complete_ = false;
};
} // namespace cc
#endif // CC_RASTER_TILE_TASK_H_
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