Adaptively throttle texture uploads

cc/CCTextureUpdateController.h

 // 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 CCTextureUpdateController_h
 #define CCTextureUpdateController_h
 
 #include "CCTextureUpdateQueue.h"
 #include "CCTimer.h"
 #include <wtf/Noncopyable.h>
 #include <wtf/OwnPtr.h>
 
 namespace cc {
 
 class TextureCopier;
 class TextureUploader;
 
 class CCTextureUpdateControllerClient {
 public:
     virtual void readyToFinalizeTextureUpdates() = 0;
 
 protected:
     virtual ~CCTextureUpdateControllerClient() { }
 };
 
 class CCTextureUpdateController : public CCTimerClient {
     WTF_MAKE_NONCOPYABLE(CCTextureUpdateController);
 public:
-    static PassOwnPtr<CCTextureUpdateController> create(CCTextureUpdateControllerClient* client, CCThread* thread, PassOwnPtr<CCTextureUpdateQueue> queue, CCResourceProvider* resourceProvider, TextureCopier* copier, TextureUploader* uploader)
+    static PassOwnPtr<CCTextureUpdateController> create(CCTextureUpdateControllerClient* client, CCThread* thread, PassOwnPtr<CCTextureUpdateQueue> queue, CCResourceProvider* resourceProvider, TextureCopier* copier, TextureUploader* uploader, size_t maxPartialTextureUpdates)
     {
-        return adoptPtr(new CCTextureUpdateController(client, thread, queue, resourceProvider, copier, uploader));
+        return adoptPtr(new CCTextureUpdateController(client, thread, queue, resourceProvider, copier, uploader, maxPartialTextureUpdates));
     }
-    static size_t maxPartialTextureUpdates();
+    static size_t maxPartialUpdatesDefault();
+    static size_t maxPartialUpdates(TextureUploader*);
     static void updateTextures(CCResourceProvider*, TextureCopier*, TextureUploader*, CCTextureUpdateQueue*, size_t count);
 
     virtual ~CCTextureUpdateController();
 
     void performMoreUpdates(double monotonicTimeLimit);
     void finalize();
 
     // CCTimerClient implementation.
     virtual void onTimerFired() OVERRIDE;
 
     // Virtual for testing.
     virtual double monotonicTimeNow() const;
     virtual double updateMoreTexturesTime() const;
     virtual size_t updateMoreTexturesSize() const;
 
 protected:
-    CCTextureUpdateController(CCTextureUpdateControllerClient*, CCThread*, PassOwnPtr<CCTextureUpdateQueue>, CCResourceProvider*, TextureCopier*, TextureUploader*);
+    CCTextureUpdateController(CCTextureUpdateControllerClient*, CCThread*, PassOwnPtr<CCTextureUpdateQueue>, CCResourceProvider*, TextureCopier*, TextureUploader*, size_t maxPartialTextureUpdates);
+
+    static size_t maxFullUpdatesPerTick(TextureUploader*);
 
     // This returns true when there were textures left to update.
     bool updateMoreTexturesIfEnoughTimeRemaining();
     void updateMoreTexturesNow();
 
     CCTextureUpdateControllerClient* m_client;
     OwnPtr<CCTimer> m_timer;
     OwnPtr<CCTextureUpdateQueue> m_queue;
     bool m_contentsTexturesPurged;
     CCResourceProvider* m_resourceProvider;
     TextureCopier* m_copier;
     TextureUploader* m_uploader;
     double m_monotonicTimeLimit;
+    size_t m_textureUpdatesPerTick;
+    size_t m_maxPartialTextureUpdates;
     bool m_firstUpdateAttempt;
 };
 
 }
 
 #endif // CCTextureUpdateController_h