Rework blast sync callback model

The previous code waited for a frame complete callback from hwui before
notifying WMS that a draw had occurred. However, frame complete callback
was not guaranteed to get called since it only invokes a callback if a
draw actually occured. VRI really needs a signal that RT has completed,
since it just needs to know that a draw was possible so it can notify
WMS that the RT completed its pass.

Instead, rename frameCompleteCallback to frameCommitCallback since that
API is exposed to a public API when a frame was actually drawn.
Create a new callback, frameCompleteCallback, that is invoked when the
draw has completed, regardless if a frame was actually drawn.

When the frameCompleteCallback is invoked, VRI can check to see if a new
frame actually drew. VRI can call into BBQ to see if the frame acquired
matches the frame that was attempted to draw. If so, VRI can wait on a
transaction callback. If not, it can allow VRI to continue. In either case,
it will notify WMS that the draw has finished.

Test: Split over and over
Bug: 195262673
Bug: 193634619
Change-Id: I24dd19ab2746be3fc33e597761abf8c5249f8b5b
Merged-In: I24dd19ab2746be3fc33e597761abf8c5249f8b5b

1 files changed, 7 insertions, 2 deletions

diff --git a/libs/hwui/renderthread/DrawFrameTask.h b/libs/hwui/renderthread/DrawFrameTask.h
index 6a61a2bb645f..e3ea802b07b9 100644
--- a/libs/hwui/renderthread/DrawFrameTask.h
+++ b/libs/hwui/renderthread/DrawFrameTask.h
@@ -81,7 +81,11 @@ public:
         mFrameCallback = std::move(callback);
     }
 
-    void setFrameCompleteCallback(std::function<void(int64_t)>&& callback) {
+    void setFrameCommitCallback(std::function<void(bool)>&& callback) {
+        mFrameCommitCallback = std::move(callback);
+    }
+
+    void setFrameCompleteCallback(std::function<void()>&& callback) {
         mFrameCompleteCallback = std::move(callback);
     }
 
@@ -123,7 +127,8 @@ private:
     int64_t mFrameInfo[UI_THREAD_FRAME_INFO_SIZE];
 
     std::function<void(int64_t)> mFrameCallback;
-    std::function<void(int64_t)> mFrameCompleteCallback;
+    std::function<void(bool)> mFrameCommitCallback;
+    std::function<void()> mFrameCompleteCallback;
 
     nsecs_t mLastDequeueBufferDuration = 0;
     nsecs_t mLastTargetWorkDuration = 0;