GBM Ozone implementation

ui/ozone/platform/dri/scanout_surface.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 UI_OZONE_PLATFORM_DRI_SCANOUT_SURFACE_H_
+#define UI_OZONE_PLATFORM_DRI_SCANOUT_SURFACE_H_
+
+#include <stdint.h>
+
+namespace gfx {
+class Size;
+}
+
+namespace ui {
+
+// Initializes and stores state associated with the drawing surface.

[rjkroege, 2014/05/27 15:33:42]

I'd appreciate a bit more explanation here.

[dnicoara, 2014/05/27 17:20:52]

Done. Moved the generic part from DriSurface here.

+class ScanoutSurface {
+ public:
+  virtual ~ScanoutSurface() {}
+
+  // Used to allocate all necessary buffers for this surface. If the
+  // initialization succeeds, the device is ready to be used for drawing
+  // operations.
+  // Returns true if the initialization is successful, false otherwise.
+  virtual bool Initialize() = 0;
+
+  // Swaps the back buffer with the front buffer.
+  virtual void SwapBuffers() = 0;
+
+  // Returns the ID of the current backbuffer.
+  virtual uint32_t GetFramebufferId() const = 0;
+
+  // Returns the handle of the current backbuffer.
+  virtual uint32_t GetHandle() const = 0;
+
+  // Returns the surface size.
+  virtual gfx::Size Size() const = 0;
+};
+
+class ScanoutSurfaceGenerator {
+ public:
+  virtual ~ScanoutSurfaceGenerator() {}
+
+  virtual ScanoutSurface* Create(const gfx::Size& size) = 0;
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRI_SCANOUT_SURFACE_H_