Implement DRM Native Pixmap using prime buffer

ui/ozone/platform/drm/common/client_native_pixmap_dmabuf.h

+// Copyright 2016 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 UI_OZONE_PLATFORM_DRM_COMMON_CLIENT_NATIVE_PIXMAP_DMABUF_H_
+#define UI_OZONE_PLATFORM_DRM_COMMON_CLIENT_NATIVE_PIXMAP_DMABUF_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/ozone/public/client_native_pixmap.h"
+
+namespace ui {
+
+class ClientNativePixmapDmaBuf : public ClientNativePixmap {
+ public:
+  static scoped_ptr<ClientNativePixmap> ImportFromDmabuf(int dmabuf_fd,
+                                                         const gfx::Size& size,
+                                                         int stride);
+
+  ~ClientNativePixmapDmaBuf() override;
+
+  // Overridden from ClientNativePixmap.
+  void* Map() override;
+  void Unmap() override;
+  void GetStride(int* stride) const override;
+
+ private:
+  ClientNativePixmapDmaBuf(int dmabuf_fd, const gfx::Size& size, int stride);
+
+  const gfx::Size size_;
+  const int stride_;
+  void* data_;
+
+  DISALLOW_COPY_AND_ASSIGN(ClientNativePixmapDmaBuf);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_COMMON_CLIENT_NATIVE_PIXMAP_DMABUF_H_