1 // Copyright 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CC_TREES_LAYER_TREE_HOST_CLIENT_H_ 6 #define CC_TREES_LAYER_TREE_HOST_CLIENT_H_ 7 8 #include "base/memory/ref_counted.h" 9 #include "base/memory/scoped_ptr.h" 10 #include "base/time/time.h" 11 12 namespace gfx { 13 class Vector2d; 14 } 15 16 namespace cc { 17 class ContextProvider; 18 class InputHandlerClient; 19 class OutputSurface; 20 21 class LayerTreeHostClient { 22 public: 23 virtual void WillBeginMainFrame(int frame_id) = 0; 24 // Marks finishing compositing-related tasks on the main thread. In threaded 25 // mode, this corresponds to DidCommit(). 26 virtual void DidBeginMainFrame() = 0; 27 virtual void Animate(base::TimeTicks frame_begin_time) = 0; 28 virtual void Layout() = 0; 29 virtual void ApplyScrollAndScale(const gfx::Vector2d& scroll_delta, 30 float page_scale) = 0; 31 // Creates an OutputSurface. If fallback is true, it should attempt to 32 // create an OutputSurface that is guaranteed to initialize correctly. 33 virtual scoped_ptr<OutputSurface> CreateOutputSurface(bool fallback) = 0; 34 virtual void DidInitializeOutputSurface() = 0; 35 virtual void WillCommit() = 0; 36 virtual void DidCommit() = 0; 37 virtual void DidCommitAndDrawFrame() = 0; 38 virtual void DidCompleteSwapBuffers() = 0; 39 40 // Requests that the client insert a rate limiting token in the shared main 41 // thread context's command stream that will block if the context gets too far 42 // ahead of the compositor's command stream. Only needed if the tree contains 43 // a TextureLayer that calls SetRateLimitContext(true). 44 virtual void RateLimitSharedMainThreadContext() {} 45 46 // This hook is for testing. 47 virtual void DidFailToInitializeOutputSurface() {} 48 49 protected: 50 virtual ~LayerTreeHostClient() {} 51 }; 52 53 } // namespace cc 54 55 #endif // CC_TREES_LAYER_TREE_HOST_CLIENT_H_ 56
