gpu: Compositor management of GpuMemoryBuffer instances.

content/browser/gpu/browser_gpu_memory_buffer_manager.h

+// 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 CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
+#define CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_
+
+#include "base/callback.h"
+#include "cc/resources/gpu_memory_buffer_manager.h"
+#include "content/common/content_export.h"
+
+namespace content {
+class GpuMemoryBufferImpl;
+
+class CONTENT_EXPORT BrowserGpuMemoryBufferManager
+    : public cc::GpuMemoryBufferManager {
+ public:
+  typedef base::Callback<void(const gfx::GpuMemoryBufferHandle& handle)>
+      AllocationCallback;
+
+  explicit BrowserGpuMemoryBufferManager(int gpu_client_id);
+  virtual ~BrowserGpuMemoryBufferManager();
+
+  static BrowserGpuMemoryBufferManager* current();
+
+  // Overridden from cc::GpuMemoryBufferManager:
+  virtual scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
+      const gfx::Size& size,
+      gfx::GpuMemoryBuffer::Format format,
+      gfx::GpuMemoryBuffer::Usage usage) override;
+  virtual gfx::GpuMemoryBuffer* GpuMemoryBufferFromClientBuffer(
+      ClientBuffer buffer) override;
+
+  void AllocateGpuMemoryBufferForChildProcess(
+      const gfx::Size& size,
+      gfx::GpuMemoryBuffer::Format format,
+      gfx::GpuMemoryBuffer::Usage usage,
+      base::ProcessHandle child_process_handle,
+      int child_client_id,
+      const AllocationCallback& callback);
+  void ChildProcessDeletedGpuMemoryBuffer(
+      gfx::GpuMemoryBufferType type,
+      const gfx::GpuMemoryBufferId& id,
+      base::ProcessHandle child_process_handle);
+  void ProcessRemoved(base::ProcessHandle process_handle);
+
+ private:
+  struct AllocateGpuMemoryBufferRequest;
+
+  static void AllocateGpuMemoryBufferOnIO(
+      AllocateGpuMemoryBufferRequest* request);
+  static void GpuMemoryBufferCreatedOnIO(
+      AllocateGpuMemoryBufferRequest* request,
+      scoped_ptr<GpuMemoryBufferImpl> buffer);
+
+  int gpu_client_id_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GPU_BROWSER_GPU_MEMORY_BUFFER_MANAGER_H_