blimp/client/compositor/blimp_context_provider.h

   1 // Copyright 2015 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 BLIMP_CLIENT_COMPOSITOR_BLIMP_CONTEXT_PROVIDER_H_
   6 #define BLIMP_CLIENT_COMPOSITOR_BLIMP_CONTEXT_PROVIDER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/synchronization/lock.h"
  11 #include "base/threading/thread_checker.h"
  12 #include "cc/output/context_provider.h"
  13 #include "gpu/command_buffer/client/gl_in_process_context.h"
  14 #include "skia/ext/refptr.h"
  15 #include "ui/gl/gl_surface.h"
  16
  17 namespace blimp {
  18
  19 // Helper class to provide a graphics context for the compositor.
  20 class BlimpContextProvider : public cc::ContextProvider {
  21  public:
  22   static scoped_refptr<BlimpContextProvider> Create(
  23       gfx::AcceleratedWidget widget);
  24
  25   // cc::ContextProvider implementation.
  26   bool BindToCurrentThread() override;
  27   void DetachFromThread() override;
  28   Capabilities ContextCapabilities() override;
  29   gpu::gles2::GLES2Interface* ContextGL() override;
  30   gpu::ContextSupport* ContextSupport() override;
  31   class GrContext* GrContext() override;
  32   void InvalidateGrContext(uint32_t state) override;
  33   void SetupLock() override;
  34   base::Lock* GetLock() override;
  35   void VerifyContexts() override;
  36   void DeleteCachedResources() override;
  37   bool DestroyedOnMainThread() override;
  38   void SetLostContextCallback(
  39       const LostContextCallback& lost_context_callback) override;
  40   void SetMemoryPolicyChangedCallback(
  41       const MemoryPolicyChangedCallback& memory_policy_changed_callback)
  42       override;
  43
  44  protected:
  45   explicit BlimpContextProvider(gfx::AcceleratedWidget widget);
  46   ~BlimpContextProvider() override;
  47
  48  private:
  49   void OnLostContext();
  50
  51   base::ThreadChecker main_thread_checker_;
  52   base::ThreadChecker context_thread_checker_;
  53
  54   base::Lock context_lock_;
  55   scoped_ptr<gpu::GLInProcessContext> context_;
  56   skia::RefPtr<class GrContext> gr_context_;
  57
  58   cc::ContextProvider::Capabilities capabilities_;
  59
  60   LostContextCallback lost_context_callback_;
  61
  62   base::Lock destroyed_lock_;
  63   bool destroyed_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(BlimpContextProvider);
  66 };
  67
  68 }  // namespace blimp
  69
  70 #endif  // BLIMP_CLIENT_COMPOSITOR_BLIMP_CONTEXT_PROVIDER_H_