diff --git a/drmdisplaycompositor.h b/drmdisplaycompositor.h
index 9f50664..46d71ae 100644
--- a/drmdisplaycompositor.h
+++ b/drmdisplaycompositor.h
@@ -20,6 +20,7 @@
 #include "drm_hwcomposer.h"
 #include "drmcomposition.h"
 #include "drmcompositorworker.h"
+#include "drmframebuffer.h"
 
 #include <pthread.h>
 #include <queue>
@@ -28,8 +29,12 @@
 #include <hardware/hardware.h>
 #include <hardware/hwcomposer.h>
 
+#define DRM_DISPLAY_BUFFERS 2
+
 namespace android {
 
+class GLWorkerCompositor;
+
 class DrmDisplayCompositor {
  public:
   DrmDisplayCompositor();
@@ -46,6 +51,7 @@
  private:
   DrmDisplayCompositor(const DrmDisplayCompositor &) = delete;
 
+  int ApplyPreComposite(DrmDisplayComposition *display_comp);
   int ApplyFrame(DrmDisplayComposition *display_comp);
   int ApplyDpms(DrmDisplayComposition *display_comp);
 
@@ -62,6 +68,10 @@
   bool initialized_;
   bool active_;
 
+  int framebuffer_index_;
+  DrmFramebuffer framebuffers_[DRM_DISPLAY_BUFFERS];
+  std::unique_ptr<GLWorkerCompositor> pre_compositor_;
+
   // mutable since we need to acquire in HaveQueuedComposites
   mutable pthread_mutex_t lock_;