Add Intel DRM backed GpuMemoryBuffer implementation.

content/common/gpu/client/gpu_memory_buffer_impl_intel_drm.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_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_INTEL_DRM_H_
+#define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_INTEL_DRM_H_
+
+#include "content/common/gpu/client/gpu_memory_buffer_impl.h"
+
+typedef struct _drm_intel_bo drm_intel_bo;
+
+namespace content {
+
+// Provides implementation of a GPU memory buffer based on an intel DRM buffer
+// object.
+class GpuMemoryBufferImplIntelDRM : public GpuMemoryBufferImpl {
+ public:
+  GpuMemoryBufferImplIntelDRM(gfx::Size size, unsigned internalformat);
+  virtual ~GpuMemoryBufferImplIntelDRM();
+
+  static bool IsFormatSupported(unsigned internalformat);
+
+  static drm_intel_bo* CreateBufferObject(gfx::Size size,
+                                          unsigned internalformat);
+
+  static bool AllocateBufferObject(gfx::Size size,
+                                   unsigned internalformat,
+                                   base::SharedMemoryHandle* handle);
+
+  bool Initialize(gfx::GpuMemoryBufferHandle handle);
+  bool InitializeFromBufferObject(drm_intel_bo* buffer_object);
+
+  // Overridden from gfx::GpuMemoryBuffer:
+  virtual void* Map(AccessMode mode) OVERRIDE;
+  virtual void Unmap() OVERRIDE;
+  virtual gfx::GpuMemoryBufferHandle GetHandle() const OVERRIDE;
+
+ private:
+  drm_intel_bo* buffer_object_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplIntelDRM);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_INTEL_DRM_H_