/* * Copyright (C) 2011 Google Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef CCFrameRateController_h #define CCFrameRateController_h #include "cc/CCTimeSource.h" #include <wtf/CurrentTime.h> #include <wtf/Deque.h> #include <wtf/OwnPtr.h> #include <wtf/PassOwnPtr.h> namespace WebCore { class CCFrameRateControllerClient { public: virtual void vsyncTick() = 0; protected: virtual ~CCFrameRateControllerClient() { } }; class CCFrameRateControllerTimeSourceAdapter; class CCFrameRateController { public: explicit CCFrameRateController(PassRefPtr<CCTimeSource>); ~CCFrameRateController(); void setClient(CCFrameRateControllerClient* client) { m_client = client; } void setActive(bool); void setMaxPendingFrames(int); // Use the following methods to adjust target frame rate. // // Multiple frames can be in-progress, but for every didBeginFrame, a // didFinishFrame should be posted. // // If the rendering pipeline crashes, call didAbortAllPendingFrames. void didBeginFrame(); void didFinishFrame(); void didAbortAllPendingFrames(); void setMaxFramesPending(int); // 0 for unlimited. protected: friend class CCFrameRateControllerTimeSourceAdapter; void onTimerTick(); CCFrameRateControllerClient* m_client; int m_numFramesPending; int m_maxFramesPending; RefPtr<CCTimeSource> m_timeSource; OwnPtr<CCFrameRateControllerTimeSourceAdapter> m_timeSourceClientAdapter; }; } #endif // CCFrameRateController_h