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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_TREES_LAYER_TREE_HOST_CLIENT_H_
#define CC_TREES_LAYER_TREE_HOST_CLIENT_H_
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
namespace gfx {
class Vector2d;
}
namespace cc {
class ContextProvider;
class InputHandlerClient;
class OutputSurface;
class LayerTreeHostClient {
public:
virtual void WillBeginFrame() = 0;
// Marks finishing compositing-related tasks on the main thread. In threaded
// mode, this corresponds to DidCommit().
virtual void DidBeginFrame() = 0;
virtual void Animate(double frame_begin_time) = 0;
virtual void Layout() = 0;
virtual void ApplyScrollAndScale(gfx::Vector2d scroll_delta,
float page_scale) = 0;
virtual scoped_ptr<OutputSurface> CreateOutputSurface() = 0;
virtual void DidInitializeOutputSurface(bool success) = 0;
virtual void WillCommit() = 0;
virtual void DidCommit() = 0;
virtual void DidCommitAndDrawFrame() = 0;
virtual void DidCompleteSwapBuffers() = 0;
// Used only in the single-threaded path.
virtual void ScheduleComposite() = 0;
// These must always return a valid ContextProvider. But the provider does not
// need to be capable of creating contexts.
virtual scoped_refptr<cc::ContextProvider>
OffscreenContextProviderForMainThread() = 0;
virtual scoped_refptr<cc::ContextProvider>
OffscreenContextProviderForCompositorThread() = 0;
// This hook is for testing.
virtual void DidFailToInitializeOutputSurface() {}
protected:
virtual ~LayerTreeHostClient() {}
};
} // namespace cc
#endif // CC_TREES_LAYER_TREE_HOST_CLIENT_H_