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 CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER
6#define CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER
7
8#include "base/compiler_specific.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 "content/common/content_export.h"
14#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
15#include "webkit/common/gpu/context_provider_web_context.h"
16
17namespace webkit {
18namespace gpu {
19class GrContextForWebGraphicsContext3D;
20}
21}
22
23namespace content {
24
25// Implementation of cc::ContextProvider that provides a
26// WebGraphicsContext3DCommandBufferImpl context and a GrContext.
27class CONTENT_EXPORT ContextProviderCommandBuffer
28    : NON_EXPORTED_BASE(public webkit::gpu::ContextProviderWebContext) {
29 public:
30  static scoped_refptr<ContextProviderCommandBuffer> Create(
31      scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d,
32      const std::string& debug_name);
33
34  CommandBufferProxyImpl* GetCommandBufferProxy();
35
36  // ContextProviderWebContext implementation.
37  virtual WebGraphicsContext3DCommandBufferImpl* WebContext3D() OVERRIDE;
38
39  // cc::ContextProvider implementation.
40  virtual bool BindToCurrentThread() OVERRIDE;
41  virtual gpu::gles2::GLES2Interface* ContextGL() OVERRIDE;
42  virtual gpu::ContextSupport* ContextSupport() OVERRIDE;
43  virtual class GrContext* GrContext() OVERRIDE;
44  virtual Capabilities ContextCapabilities() OVERRIDE;
45  virtual bool IsContextLost() OVERRIDE;
46  virtual void VerifyContexts() OVERRIDE;
47  virtual void DeleteCachedResources() OVERRIDE;
48  virtual bool DestroyedOnMainThread() OVERRIDE;
49  virtual void SetLostContextCallback(
50      const LostContextCallback& lost_context_callback) OVERRIDE;
51  virtual void SetMemoryPolicyChangedCallback(
52      const MemoryPolicyChangedCallback& memory_policy_changed_callback)
53      OVERRIDE;
54
55 protected:
56  ContextProviderCommandBuffer(
57      scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d,
58      const std::string& debug_name);
59  virtual ~ContextProviderCommandBuffer();
60
61  void OnLostContext();
62  void OnMemoryAllocationChanged(const gpu::MemoryAllocation& allocation);
63
64 private:
65  void InitializeCapabilities();
66
67  base::ThreadChecker main_thread_checker_;
68  base::ThreadChecker context_thread_checker_;
69
70  scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d_;
71  scoped_ptr<webkit::gpu::GrContextForWebGraphicsContext3D> gr_context_;
72
73  cc::ContextProvider::Capabilities capabilities_;
74  std::string debug_name_;
75
76  LostContextCallback lost_context_callback_;
77  MemoryPolicyChangedCallback memory_policy_changed_callback_;
78
79  base::Lock main_thread_lock_;
80  bool destroyed_;
81
82  class LostContextCallbackProxy;
83  scoped_ptr<LostContextCallbackProxy> lost_context_callback_proxy_;
84};
85
86}  // namespace content
87
88#endif  // CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER
89