cc/output/context_provider.h

   1 // Copyright (c) 2013 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_OUTPUT_CONTEXT_PROVIDER_H_
   6 #define CC_OUTPUT_CONTEXT_PROVIDER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9
  10 class GrContext;
  11 namespace WebKit { class WebGraphicsContext3D; }
  12
  13 namespace cc {
  14
  15 class ContextProvider : public base::RefCountedThreadSafe<ContextProvider> {
  16  public:
  17   // Bind the 3d context to the current thread. This should be called before
  18   // accessing the contexts. Calling it more than once should have no effect.
  19   // Once this function has been called, the class should only be accessed
  20   // from the same thread.
  21   virtual bool BindToCurrentThread() = 0;
  22
  23   virtual WebKit::WebGraphicsContext3D* Context3d() = 0;
  24   virtual class GrContext* GrContext() = 0;
  25
  26   // Ask the provider to check if the contexts are valid or lost. If they are,
  27   // this should invalidate the provider so that it can be replaced with a new
  28   // one.
  29   virtual void VerifyContexts() = 0;
  30
  31   // A method to be called from the main thread that should return true if
  32   // the context inside the provider is no longer valid.
  33   virtual bool DestroyedOnMainThread() = 0;
  34
  35  protected:
  36   friend class base::RefCountedThreadSafe<ContextProvider>;
  37   virtual ~ContextProvider() {}
  38 };
  39
  40 }  // namespace cc
  41
  42 #endif  // CC_OUTPUT_CONTEXT_PROVIDER_H_