diff --git a/virtualcompositorworker.h b/virtualcompositorworker.h
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--- /dev/null
+++ b/virtualcompositorworker.h
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_VIRTUAL_COMPOSITOR_WORKER_H_
+#define ANDROID_VIRTUAL_COMPOSITOR_WORKER_H_
+
+#include "drm_hwcomposer.h"
+#include "worker.h"
+
+#include <queue>
+
+namespace android {
+
+class VirtualCompositorWorker : public Worker {
+ public:
+  VirtualCompositorWorker();
+  ~VirtualCompositorWorker();
+
+  int Init();
+  void QueueComposite(hwc_display_contents_1_t *dc);
+
+ protected:
+  virtual void Routine();
+
+ private:
+  struct VirtualComposition {
+    UniqueFd outbuf_acquire_fence;
+    std::vector<UniqueFd> layer_acquire_fences;
+    int release_timeline;
+  };
+
+  int CreateNextTimelineFence();
+  int FinishComposition(int timeline);
+  void Compose(std::unique_ptr<VirtualComposition> composition);
+
+  std::queue<std::unique_ptr<VirtualComposition>> composite_queue_;
+  int timeline_fd_;
+  int timeline_;
+  int timeline_current_;
+};
+}
+
+#endif