Bug 1299928 - Part 5: Handle gamepad events in Vsync time; r=kip

MozReview-Commit-ID: Ndt3zajkli

--HG--
extra : rebase_source : 1e14a470ea3aede5c167f7699db0f3b8bdfdfa10

gfx/vr/VRManager.cpp

@@ -185,12 +185,16 @@ VRManager::NotifyVsync(const TimeStamp& aVsyncTimestamp)
     if (mLastRefreshTime.IsNull()) {
       // This is the first vsync, must refresh VR displays
       RefreshVRDisplays();
+      RefreshVRControllers();
+      mLastRefreshTime = TimeStamp::Now();
     } else {
       // We don't have to do this every frame, so check if we
       // have refreshed recently.
       TimeDuration duration = TimeStamp::Now() - mLastRefreshTime;
       if (duration.ToMilliseconds() > kVRDisplayRefreshMaxDuration) {
         RefreshVRDisplays();
+        RefreshVRControllers();
+        mLastRefreshTime = TimeStamp::Now();
       }
     }
   }
@@ -252,8 +256,6 @@ VRManager::RefreshVRDisplays(bool aMustDispatch)
   if (displayInfoChanged || aMustDispatch) {
     DispatchVRDisplayInfoUpdate();
   }
-
-  mLastRefreshTime = TimeStamp::Now();
 }
 
 void
@@ -325,6 +327,44 @@ VRManager::GetVRControllerInfo(nsTArray<VRControllerInfo>& aControllerInfo)
   }
 }
 
+void
+VRManager::RefreshVRControllers()
+{
+  nsTArray<RefPtr<gfx::VRControllerHost>> controllers;
+
+  for (uint32_t i = 0; i < mControllerManagers.Length()
+      && controllers.Length() == 0; ++i) {
+    mControllerManagers[i]->GetControllers(controllers);
+  }
+
+  bool controllerInfoChanged = false;
+
+  if (controllers.Length() != mVRControllers.Count()) {
+    // Catch cases where VR controllers has been removed
+    controllerInfoChanged = true;
+  }
+
+  for (const auto& controller : controllers) {
+    if (!GetController(controller->GetControllerInfo().GetControllerID())) {
+      // This is a new controller
+      controllerInfoChanged = true;
+      break;
+    }
+  }
+
+  if (controllerInfoChanged) {
+    mVRControllers.Clear();
+    for (const auto& controller : controllers) {
+      mVRControllers.Put(controller->GetControllerInfo().GetControllerID(),
+                         controller);
+    }
+  }
+
+  for (uint32_t i = 0; i < mControllerManagers.Length(); ++i) {
+    mControllerManagers[i]->HandleInput();
+  }
+}
+
 void
 VRManager::ScanForDevices()
 {

gfx/vr/VRManager.h

@@ -60,6 +60,7 @@ private:
   void Destroy();
 
   void DispatchVRDisplayInfoUpdate();
+  void RefreshVRControllers();
 
   typedef nsTHashtable<nsRefPtrHashKey<VRManagerParent>> VRManagerParentSet;
   VRManagerParentSet mVRManagerParents;

gfx/vr/gfxVROpenVR.cpp

@@ -510,6 +510,35 @@ VRControllerManagerOpenVR::Destroy()
   mOpenVRInstalled = false;
 }
 
+void
+VRControllerManagerOpenVR::HandleInput()
+{
+  MOZ_ASSERT(mVRSystem);
+
+  // Process OpenVR controller state
+  for (vr::TrackedDeviceIndex_t trackedDevice = 0;
+       trackedDevice < vr::k_unMaxTrackedDeviceCount; trackedDevice++ ) {
+    vr::VRControllerState_t state;
+
+    if (mVRSystem->GetTrackedDeviceClass(trackedDevice)
+        != vr::TrackedDeviceClass_Controller) {
+      continue;
+    }
+
+    if (mVRSystem->GetControllerState(trackedDevice, &state)) {
+      if (state.ulButtonPressed) {
+        // TODO: For Bug 1299929 after landing, convert the button mask to an ID button
+        // NewButtonEvent(1,
+        //                0,
+        //                0,
+        //                true);
+      }
+    }
+  }
+
+  return;
+}
+
 void
 VRControllerManagerOpenVR::GetControllers(nsTArray<RefPtr<VRControllerHost>>& aControllerResult)
 {