Ozone SkBitmap implementation using DRM buffers

ui/gfx/ozone/impl/drm_skbitmap_ozone.h

+// Copyright (c) 2013 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_GFX_OZONE_IMPL_DRM_SKBITMAP_OZONE_H_
+#define UI_GFX_OZONE_IMPL_DRM_SKBITMAP_OZONE_H_
+
+#include "base/basictypes.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+namespace gfx {
+
+// Extend the SkBitmap interface to keep track of additional parameters used by
+// the DRM stack when allocating buffers.
+class DrmSkBitmapOzone : public SkBitmap {
+ public:
+  DrmSkBitmapOzone(int fd);
+  virtual ~DrmSkBitmapOzone();
+
+  // Allocates the backing pixels using DRM.
+  // Return true on success, false otherwise.
+  virtual bool Initialize();
+
+  uint32_t get_handle() const { return handle_; };
+
+  uint32_t get_framebuffer() const { return framebuffer_; };
+
+  int get_fd() const { return fd_; };
+
+  // Return the color depth of a pixel in this buffer.
+  uint8_t GetColorDepth() const;
+
+ private:
+  friend class DrmAllocator;
+
+  void set_handle(uint32_t handle) { handle_ = handle; };
+  void set_framebuffer(uint32_t framebuffer) { framebuffer_ = framebuffer; };
+
+  // File descriptor used by the DRM allocator to request buffers from the DRM
+  // stack.
+  int fd_;
+
+  // Buffer handle used by the DRM allocator.
+  uint32_t handle_;
+
+  // Buffer ID used by the DRM modesettings API. This is set when the buffer is
+  // registered with the CRTC.
+  uint32_t framebuffer_;
+
+  DISALLOW_COPY_AND_ASSIGN(DrmSkBitmapOzone);
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_OZONE_IMPL_DRM_SKBITMAP_OZONE_H_