Add logging of various important graphics events

There are 16 events logged in the event log:
SF_APP_DEQUEUE_BEFORE
SF_APP_DEQUEUE_AFTER
SF_APP_LOCK_BEFORE
SF_APP_LOCK_AFTER
SF_APP_QUEUE

SF_REPAINT
SF_COMPOSITION_COMPLETE
SF_UNLOCK_CLIENTS
SF_SWAP_BUFFERS
SF_REPAINT_DONE

SF_FB_POST_BEFORE
SF_FB_POST_AFTER
SF_FB_DEQUEUE_BEFORE
SF_FB_DEQUEUE_AFTER
SF_FB_LOCK_BEFORE
SF_FB_LOCK_AFTER

all events log the buffer conserned and a timestamp in microseconds.

by default the logging is not enabled, to turn it on:
adb shell service call SurfaceFlinger 1006 i31 1
adb shell setprop debug.graphic_log 1

The effect is immediate in SurfaceFlinger, but applications need to be
restarted.

Change-Id: Ifc2e31f7aed072d9a7dede20ff2ce59231edbec1

1 files changed, 4 insertions, 0 deletions

diff --git a/include/ui/FramebufferNativeWindow.h b/include/ui/FramebufferNativeWindow.h
index 0f4594f..c913355 100644
--- a/include/ui/FramebufferNativeWindow.h
+++ b/include/ui/FramebufferNativeWindow.h
@@ -56,6 +56,9 @@ public:
     status_t setUpdateRectangle(const Rect& updateRect);
     status_t compositionComplete();
     
+    // for debugging only
+    int getCurrentBufferIndex() const;
+
 private:
     friend class LightRefBase<FramebufferNativeWindow>;    
     ~FramebufferNativeWindow(); // this class cannot be overloaded
@@ -77,6 +80,7 @@ private:
     int32_t mNumBuffers;
     int32_t mNumFreeBuffers;
     int32_t mBufferHead;
+    int32_t mCurrentBufferIndex;
     bool mUpdateOnDemand;
 };