commit 9ed43398bd0766e759da21e89d9ea5c10bad2b78
author Arthur Hung <arthurhung@google.com> Fri May 27 06:31:57 2022 +0000
committer Arthur Hung <arthurhung@google.com> Fri Jun 17 01:32:01 2022 +0000
tree 92094f2d627ea142e488f4b0851ddc026facedde
parent 55b2c0b5e9e0be0d35775dfa2ca958ae7ca0b9b1

Reduce setInputWindows call (1/2)

The cursor surface and hotspot surface would cause the visible region
dirty when moving on the screen. That would also cause SF update the
input infos to InputFlinger.

To reduce unecessary updating, add more checking for same value and
ignore updating if just the cursor moving.

Test: enable setInputWindow log, connect a mouse device and move.
Bug: 133780957
Change-Id: I099c1175e291adccfafce49536acfdfb38c40371

services/surfaceflinger/SurfaceFlinger.cpp

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index a7438f2..c2affbd 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -3115,6 +3115,7 @@
     const KeyedVector<wp<IBinder>, DisplayDeviceState>& draw(mDrawingState.displays);
     if (!curr.isIdenticalTo(draw)) {
         mVisibleRegionsDirty = true;
+        mUpdateInputInfo = true;
 
         // find the displays that were removed
         // (ie: in drawing state but not in current state)
@@ -3159,6 +3160,7 @@
     if (mSomeChildrenChanged) {
         mVisibleRegionsDirty = true;
         mSomeChildrenChanged = false;
+        mUpdateInputInfo = true;
     }
 
     // Update transform hint.
@@ -3222,6 +3224,7 @@
         mLayersAdded = false;
         // Layers have been added.
         mVisibleRegionsDirty = true;
+        mUpdateInputInfo = true;
     }
 
     // some layers might have been removed, so
@@ -3229,6 +3232,7 @@
     if (mLayersRemoved) {
         mLayersRemoved = false;
         mVisibleRegionsDirty = true;
+        mUpdateInputInfo = true;
         mDrawingState.traverseInZOrder([&](Layer* layer) {
             if (mLayersPendingRemoval.indexOf(layer) >= 0) {
                 // this layer is not visible anymore
@@ -3253,14 +3257,14 @@
     std::vector<WindowInfo> windowInfos;
     std::vector<DisplayInfo> displayInfos;
     bool updateWindowInfo = false;
-    if (mVisibleRegionsDirty || mInputInfoChanged) {
-        mInputInfoChanged = false;
+    if (mUpdateInputInfo) {
+        mUpdateInputInfo = false;
         updateWindowInfo = true;
         buildWindowInfos(windowInfos, displayInfos);
-    }
-    if (!updateWindowInfo && mInputWindowCommands.empty()) {
+    } else if (mInputWindowCommands.empty()) {
         return;
     }
+
     BackgroundExecutor::getInstance().sendCallbacks({[updateWindowInfo,
                                                       windowInfos = std::move(windowInfos),
                                                       displayInfos = std::move(displayInfos),
@@ -4609,7 +4613,7 @@
     if (what & layer_state_t::eDropInputModeChanged) {
         if (layer->setDropInputMode(s.dropInputMode)) {
             flags |= eTraversalNeeded;
-            mInputInfoChanged = true;
+            mUpdateInputInfo = true;
         }
     }
     // This has to happen after we reparent children because when we reparent to null we remove