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// Copyright 2012 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_RESOURCE_UPDATE_CONTROLLER_H_
#define CC_RESOURCE_UPDATE_CONTROLLER_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time.h"
#include "cc/cc_export.h"
#include "cc/resource_update_queue.h"
namespace cc {
class ResourceProvider;
class Thread;
class ResourceUpdateControllerClient {
public:
virtual void readyToFinalizeTextureUpdates() = 0;
protected:
virtual ~ResourceUpdateControllerClient() { }
};
class CC_EXPORT ResourceUpdateController {
public:
static scoped_ptr<ResourceUpdateController> create(ResourceUpdateControllerClient* client, Thread* thread, scoped_ptr<ResourceUpdateQueue> queue, ResourceProvider* resourceProvider, bool hasImplThread)
{
return make_scoped_ptr(new ResourceUpdateController(client, thread, queue.Pass(), resourceProvider, hasImplThread));
}
static size_t maxPartialTextureUpdates();
virtual ~ResourceUpdateController();
// Discard uploads to textures that were evicted on the impl thread.
void discardUploadsToEvictedResources();
void performMoreUpdates(base::TimeTicks timeLimit);
void finalize();
// Virtual for testing.
virtual base::TimeTicks now() const;
virtual base::TimeDelta updateMoreTexturesTime() const;
virtual size_t updateMoreTexturesSize() const;
protected:
ResourceUpdateController(ResourceUpdateControllerClient*, Thread*, scoped_ptr<ResourceUpdateQueue>, ResourceProvider*, bool hasImplThread);
private:
static size_t maxFullUpdatesPerTick(ResourceProvider*);
size_t maxBlockingUpdates() const;
base::TimeDelta pendingUpdateTime() const;
void updateTexture(ResourceUpdate);
// This returns true when there were textures left to update.
bool updateMoreTexturesIfEnoughTimeRemaining();
void updateMoreTexturesNow();
void onTimerFired();
ResourceUpdateControllerClient* m_client;
bool m_hasImplThread;
scoped_ptr<ResourceUpdateQueue> m_queue;
bool m_contentsTexturesPurged;
ResourceProvider* m_resourceProvider;
base::TimeTicks m_timeLimit;
size_t m_textureUpdatesPerTick;
bool m_firstUpdateAttempt;
Thread* m_thread;
base::WeakPtrFactory<ResourceUpdateController> m_weakFactory;
bool m_taskPosted;
DISALLOW_COPY_AND_ASSIGN(ResourceUpdateController);
};
} // namespace cc
#endif // CC_RESOURCE_UPDATE_CONTROLLER_H_
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