| // Copyright (c) 2013 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_OUTPUT_CONTEXT_PROVIDER_H_ |
| #define CC_OUTPUT_CONTEXT_PROVIDER_H_ |
| |
| #include "base/callback.h" |
| #include "base/memory/ref_counted.h" |
| |
| class GrContext; |
| namespace WebKit { class WebGraphicsContext3D; } |
| |
| namespace cc { |
| |
| class ContextProvider : public base::RefCountedThreadSafe<ContextProvider> { |
| public: |
| // Bind the 3d context to the current thread. This should be called before |
| // accessing the contexts. Calling it more than once should have no effect. |
| // Once this function has been called, the class should only be accessed |
| // from the same thread. |
| virtual bool BindToCurrentThread() = 0; |
| |
| virtual WebKit::WebGraphicsContext3D* Context3d() = 0; |
| virtual class GrContext* GrContext() = 0; |
| |
| // Ask the provider to check if the contexts are valid or lost. If they are, |
| // this should invalidate the provider so that it can be replaced with a new |
| // one. |
| virtual void VerifyContexts() = 0; |
| |
| // A method to be called from the main thread that should return true if |
| // the context inside the provider is no longer valid. |
| virtual bool DestroyedOnMainThread() = 0; |
| |
| // Sets a callback to be called when the context is lost. This should be |
| // called from the same thread that the context is bound to. To avoid races, |
| // it should be called before BindToCurrentThread(), or VerifyContexts() |
| // should be called after setting the callback. |
| typedef base::Closure LostContextCallback; |
| virtual void SetLostContextCallback( |
| const LostContextCallback& lost_context_callback) = 0; |
| |
| protected: |
| friend class base::RefCountedThreadSafe<ContextProvider>; |
| virtual ~ContextProvider() {} |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_OUTPUT_CONTEXT_PROVIDER_H_ |