Initial checkin of the new Mozart compositor.

services/gfx/compositor/backend/output.h

+// Copyright 2015 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 SERVICES_GFX_COMPOSITOR_BACKEND_OUTPUT_H_
+#define SERVICES_GFX_COMPOSITOR_BACKEND_OUTPUT_H_
+
+#include <memory>
+
+#include "base/macros.h"
+
+namespace compositor {
+
+class RenderFrame;
+class Scheduler;
+
+// Renders snapshotted frames of the scene graph to a display output.
+//
+// The output object is created on the compositor's main thread and frames
+// are submitted to it from there.  Behind the scenes, the implementation of
+// Output may use some number of worker threads.  How this is accomplished
+// is left up to the implementation of the Output to decide.
+class Output {
+ public:
+  Output() = default;
+  virtual ~Output() = default;
+
+  // Gets the output's frame scheduler.
+  virtual Scheduler* GetScheduler() = 0;
+
+  // Submits a frame to be rendered to the display.
+  virtual void SubmitFrame(const std::shared_ptr<RenderFrame>& frame) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(Output);
+};
+
+}  // namespace compositor
+
+#endif  // SERVICES_GFX_COMPOSITOR_BACKEND_OUTPUT_H_