Adaptively throttle texture uploads

cc/CCThreadProxy.h

 // Copyright 2011 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 CCThreadProxy_h
 #define CCThreadProxy_h
 
 #include "CCAnimationEvents.h"
 #include "CCCompletionEvent.h"
 #include "CCLayerTreeHostImpl.h"
 #include "CCProxy.h"
 #include "CCScheduler.h"
+#include "CCTextureUpdateController.h"
 #include <wtf/OwnPtr.h>
 
 namespace WebCore {
 
 class CCInputHandler;
 class CCLayerTreeHost;
 class CCScheduler;
 class CCScopedThreadProxy;
 class CCTextureUpdateQueue;
-class CCTextureUpdateController;
 class CCThread;
 class CCThreadProxyContextRecreationTimer;
 
 class CCThreadProxy : public CCProxy, CCLayerTreeHostImplClient, CCSchedulerClient {
 public:
     static PassOwnPtr<CCProxy> create(CCLayerTreeHost*);
 
     virtual ~CCThreadProxy();
 
     // CCProxy implementation
     virtual bool compositeAndReadback(void *pixels, const IntRect&) OVERRIDE;
     virtual void startPageScaleAnimation(const IntSize& targetPosition, bool useAnchor, float scale, double duration) OVERRIDE;
     virtual void finishAllRendering() OVERRIDE;
     virtual bool isStarted() const OVERRIDE;
     virtual bool initializeContext() OVERRIDE;
     virtual void setSurfaceReady() OVERRIDE;
     virtual void setVisible(bool) OVERRIDE;
     virtual bool initializeRenderer() OVERRIDE;
     virtual bool recreateContext() OVERRIDE;
     virtual void implSideRenderingStats(CCRenderingStats&) OVERRIDE;
     virtual const RendererCapabilities& rendererCapabilities() const OVERRIDE;
     virtual void loseContext() OVERRIDE;
     virtual void setNeedsAnimate() OVERRIDE;
     virtual void setNeedsCommit() OVERRIDE;
     virtual void setNeedsRedraw() OVERRIDE;
     virtual bool commitRequested() const OVERRIDE;
     virtual void didAddAnimation() OVERRIDE { }
     virtual void start() OVERRIDE;
     virtual void stop() OVERRIDE;
-    virtual size_t maxPartialTextureUpdates() const OVERRIDE;
     virtual void acquireLayerTextures() OVERRIDE;
     virtual void forceSerializeOnSwapBuffers() OVERRIDE;
 
     // CCLayerTreeHostImplClient implementation
     virtual void didLoseContextOnImplThread() OVERRIDE;
     virtual void onSwapBuffersCompleteOnImplThread() OVERRIDE;
     virtual void onVSyncParametersChanged(double monotonicTimebase, double intervalInSeconds) OVERRIDE;
     virtual void onCanDrawStateChanged(bool canDraw) OVERRIDE;
     virtual void setNeedsRedrawOnImplThread() OVERRIDE;
     virtual void setNeedsCommitOnImplThread() OVERRIDE;
@@ skipping 22 matching lines @@
         }
 
         double monotonicFrameBeginTime;
         OwnPtr<CCScrollAndScaleSet> scrollInfo;
         bool contentsTexturesWereDeleted;
         size_t memoryAllocationLimitBytes;
     };
     OwnPtr<BeginFrameAndCommitState> m_pendingBeginFrameRequest;
 
     // Called on main thread
-    void beginFrame();
+    void beginFrame(size_t maxTextureUpdates);

[reveman, 2012/09/15 17:26:19]

should this be maxPartialTextureUpdates?

[brianderson, 2012/09/17 22:48:27]

Done.

     void didCommitAndDrawFrame();
     void didCompleteSwapBuffers();
     void setAnimationEvents(PassOwnPtr<CCAnimationEventsVector>, double wallClockTime);
     void beginContextRecreation();
     void tryToRecreateContext();
 
     // Called on impl thread
     struct ReadbackRequest {
         CCCompletionEvent completion;
         bool success;
         void* pixels;
         IntRect rect;
     };
     void forceBeginFrameOnImplThread(CCCompletionEvent*);
-    void beginFrameCompleteOnImplThread(CCCompletionEvent*, PassOwnPtr<CCTextureUpdateQueue>, bool contentsTexturesWereDeleted);
+    void beginFrameCompleteOnImplThread(CCCompletionEvent*, PassOwnPtr<CCTextureUpdateQueue>, bool contentsTexturesWereDeleted, size_t maxTextureUpdates);
     void beginFrameAbortedOnImplThread();
     void requestReadbackOnImplThread(ReadbackRequest*);
     void requestStartPageScaleAnimationOnImplThread(IntSize targetPosition, bool useAnchor, float scale, double durationSec);
     void finishAllRenderingOnImplThread(CCCompletionEvent*);
     void initializeImplOnImplThread(CCCompletionEvent*, PassOwnPtr<CCInputHandler>);
     void setSurfaceReadyOnImplThread();
     void setVisibleOnImplThread(CCCompletionEvent*, bool);
     void initializeContextOnImplThread(CCGraphicsContext*);
     void initializeRendererOnImplThread(CCCompletionEvent*, bool* initializeSucceeded, RendererCapabilities*);
     void layerTreeHostClosedOnImplThread(CCCompletionEvent*);
@@ skipping 44 matching lines @@
 
     OwnPtr<CCTextureUpdateController> m_currentTextureUpdateControllerOnImplThread;
 
     // Set when we need to reset the contentsTexturesPurged flag after the
     // commit.
     bool m_resetContentsTexturesPurgedAfterCommitOnImplThread;
 
     // Set when the next draw should post didCommitAndDrawFrame to the main thread.
     bool m_nextFrameIsNewlyCommittedFrameOnImplThread;
 
+    // We store this for when we initiate beginFrame from the main thread.
+    size_t m_mostRecentMaxTextureUpdatesOnMainThread;
+
     bool m_renderVSyncEnabled;
 };
 
 }
 
 #endif