gpu: Compositor management of GpuMemoryBuffer instances.

content/common/gpu/client/gpu_channel_host.h

 // Copyright (c) 2012 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 CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 29 matching lines @@
 
 namespace IPC {
 class SyncMessageFilter;
 }
 
 namespace media {
 class VideoDecodeAccelerator;
 class VideoEncodeAccelerator;
 }
 
+namespace cc {
+class GpuMemoryBufferManager;
+}
+
 namespace content {
 class CommandBufferProxyImpl;
 class GpuChannelHost;
 
 struct GpuListenerInfo {
   GpuListenerInfo();
   ~GpuListenerInfo();
 
   base::WeakPtr<IPC::Listener> listener;
   scoped_refptr<base::MessageLoopProxy> loop;
 };
 
 class CONTENT_EXPORT GpuChannelHostFactory {
  public:
   virtual ~GpuChannelHostFactory() {}
 
   virtual bool IsMainThread() = 0;
   virtual base::MessageLoop* GetMainLoop() = 0;
   virtual scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() = 0;
   virtual scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) = 0;
   virtual CreateCommandBufferResult CreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) = 0;
-  virtual scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
-      size_t width,
-      size_t height,
-      unsigned internalformat,
-      unsigned usage) = 0;
 };
 
 // Encapsulates an IPC channel between the client and one GPU process.
 // On the GPU process side there's a corresponding GpuChannel.
 // Every method can be called on any thread with a message loop, except for the
 // IO thread.
 class GpuChannelHost : public IPC::Sender,
                        public base::RefCountedThreadSafe<GpuChannelHost> {
  public:
   // Must be called on the main thread (as defined by the factory).
   static scoped_refptr<GpuChannelHost> Create(
       GpuChannelHostFactory* factory,
       const gpu::GPUInfo& gpu_info,
       const IPC::ChannelHandle& channel_handle,
-      base::WaitableEvent* shutdown_event);
-
-  // Returns true if |handle| is a valid GpuMemoryBuffer handle that
-  // can be shared to the GPU process.
-  static bool IsValidGpuMemoryBuffer(gfx::GpuMemoryBufferHandle handle);
+      base::WaitableEvent* shutdown_event,
+      cc::GpuMemoryBufferManager* gpu_memory_buffer_manager);
 
   bool IsLost() const {
     DCHECK(channel_filter_.get());
     return channel_filter_->IsLost();
   }
 
   // The GPU stats reported by the GPU process.
   const gpu::GPUInfo& gpu_info() const { return gpu_info_; }
 
   // IPC::Sender implementation:
@@ skipping 25 matching lines @@
 
   // Destroy a command buffer created by this channel.
   void DestroyCommandBuffer(CommandBufferProxyImpl* command_buffer);
 
   // Add a route for the current message loop.
   void AddRoute(int route_id, base::WeakPtr<IPC::Listener> listener);
   void RemoveRoute(int route_id);
 
   GpuChannelHostFactory* factory() const { return factory_; }
 
+  cc::GpuMemoryBufferManager* gpu_memory_buffer_manager() const {
+    return gpu_memory_buffer_manager_;
+  }
+
   // Returns a handle to the shared memory that can be sent via IPC to the
   // GPU process. The caller is responsible for ensuring it is closed. Returns
   // an invalid handle on failure.
   base::SharedMemoryHandle ShareToGpuProcess(
       base::SharedMemoryHandle source_handle);
 
   // Reserve one unused transfer buffer ID.
   int32 ReserveTransferBufferId();
 
   // Returns a GPU memory buffer handle to the buffer that can be sent via
   // IPC to the GPU process. The caller is responsible for ensuring it is
   // closed. Returns an invalid handle on failure.
   gfx::GpuMemoryBufferHandle ShareGpuMemoryBufferToGpuProcess(
       gfx::GpuMemoryBufferHandle source_handle);
 
-  // Reserve one unused gpu memory buffer ID.
-  int32 ReserveGpuMemoryBufferId();
+  // Reserve one unused image ID.
+  int32 ReserveImageId();
 
   // Generate a route ID guaranteed to be unique for this channel.
   int32 GenerateRouteID();
 
  private:
   friend class base::RefCountedThreadSafe<GpuChannelHost>;
   GpuChannelHost(GpuChannelHostFactory* factory,
-                 const gpu::GPUInfo& gpu_info);
+                 const gpu::GPUInfo& gpu_info,
+                 cc::GpuMemoryBufferManager* gpu_memory_buffer_manager);
   virtual ~GpuChannelHost();
   void Connect(const IPC::ChannelHandle& channel_handle,
                base::WaitableEvent* shutdown_event);
 
   // A filter used internally to route incoming messages from the IO thread
   // to the correct message loop. It also maintains some shared state between
   // all the contexts.
   class MessageFilter : public IPC::MessageFilter {
    public:
     MessageFilter();
@@ skipping 26 matching lines @@
     // Protects all fields below this one.
     mutable base::Lock lock_;
 
     // Whether the channel has been lost.
     bool lost_;
   };
 
   // Threading notes: all fields are constant during the lifetime of |this|
   // except:
   // - |next_transfer_buffer_id_|, atomic type
-  // - |next_gpu_memory_buffer_id_|, atomic type
+  // - |next_image_id_|, atomic type
   // - |next_route_id_|, atomic type
   // - |proxies_|, protected by |context_lock_|
   GpuChannelHostFactory* const factory_;
 
   const gpu::GPUInfo gpu_info_;
 
   scoped_ptr<IPC::SyncChannel> channel_;
   scoped_refptr<MessageFilter> channel_filter_;
 
+  cc::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
+
   // A filter for sending messages from thread other than the main thread.
   scoped_refptr<IPC::SyncMessageFilter> sync_filter_;
 
   // Transfer buffer IDs are allocated in sequence.
   base::AtomicSequenceNumber next_transfer_buffer_id_;
 
-  // Gpu memory buffer IDs are allocated in sequence.
-  base::AtomicSequenceNumber next_gpu_memory_buffer_id_;
+  // Image IDs are allocated in sequence.
+  base::AtomicSequenceNumber next_image_id_;
 
   // Route IDs are allocated in sequence.
   base::AtomicSequenceNumber next_route_id_;
 
   // Protects proxies_.
   mutable base::Lock context_lock_;
   // Used to look up a proxy from its routing id.
   typedef base::hash_map<int, CommandBufferProxyImpl*> ProxyMap;
   ProxyMap proxies_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_