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mojo/services/gles2/command_buffer_impl.h

Index: mojo/services/gles2/command_buffer_impl.h
diff --git a/mojo/services/gles2/command_buffer_impl.h b/mojo/services/gles2/command_buffer_impl.h
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+// Copyright 2014 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 SERVICES_GLES2_COMMAND_BUFFER_IMPL_H_
+#define SERVICES_GLES2_COMMAND_BUFFER_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/single_thread_task_runner.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
+#include "third_party/mojo_services/src/gpu/public/interfaces/command_buffer.mojom.h"
+#include "third_party/mojo_services/src/gpu/public/interfaces/viewport_parameter_listener.mojom.h"
+
+namespace gpu {
+class SyncPointManager;
+}
+
+namespace gles2 {
+class CommandBufferDriver;
+
+// This class listens to the CommandBuffer message pipe on a low-latency thread
+// so that we can insert sync points without blocking on the GL driver. It
+// forwards most method calls to the CommandBufferDriver, which runs on the
+// same thread as the native viewport.
+class CommandBufferImpl : public mojo::CommandBuffer {
+ public:
+  CommandBufferImpl(
+      mojo::InterfaceRequest<CommandBuffer> request,
+      mojo::ViewportParameterListenerPtr listener,
+      scoped_refptr<base::SingleThreadTaskRunner> control_task_runner,
+      gpu::SyncPointManager* sync_point_manager,
+      scoped_ptr<CommandBufferDriver> driver);
+  ~CommandBufferImpl() override;
+
+  void Initialize(mojo::CommandBufferSyncClientPtr sync_client,
+                  mojo::CommandBufferSyncPointClientPtr sync_point_client,
+                  mojo::CommandBufferLostContextObserverPtr loss_observer,
+                  mojo::ScopedSharedBufferHandle shared_state) override;
+  void SetGetBuffer(int32_t buffer) override;
+  void Flush(int32_t put_offset) override;
+  void MakeProgress(int32_t last_get_offset) override;
+  void RegisterTransferBuffer(int32_t id,
+                              mojo::ScopedSharedBufferHandle transfer_buffer,
+                              uint32_t size) override;
+  void DestroyTransferBuffer(int32_t id) override;
+  void InsertSyncPoint(bool retire) override;
+  void RetireSyncPoint(uint32_t sync_point) override;
+  void Echo(const mojo::Callback<void()>& callback) override;
+
+  void DidLoseContext();
+  void UpdateVSyncParameters(base::TimeTicks timebase,
+                             base::TimeDelta interval);
+
+ private:
+  void BindToRequest(mojo::InterfaceRequest<CommandBuffer> request);
+
+  scoped_refptr<gpu::SyncPointManager> sync_point_manager_;
+  scoped_refptr<base::SingleThreadTaskRunner> driver_task_runner_;
+  scoped_ptr<CommandBufferDriver> driver_;
+  mojo::CommandBufferSyncPointClientPtr sync_point_client_;
+  mojo::ViewportParameterListenerPtr viewport_parameter_listener_;
+  mojo::StrongBinding<CommandBuffer> binding_;
+
+  base::WeakPtrFactory<CommandBufferImpl> weak_factory_;
+  DISALLOW_COPY_AND_ASSIGN(CommandBufferImpl);
+};
+
+}  // namespace gles2
+
+#endif  // SERVICES_GLES2_COMMAND_BUFFER_IMPL_H_