Add cap flags as needed for WebXR related changes in GeckoView (#2516)

(cherry picked from commit 3621a19)

Author: kearwood

app/src/googlevr/cpp/DeviceDelegateGoogleVR.cpp

@@ -394,7 +394,8 @@ DeviceDelegateGoogleVR::RegisterImmersiveDisplay(ImmersiveDisplayPtr aDisplay) {
   }
 
   m.immersiveDisplay->SetDeviceName("Daydream");
-  m.immersiveDisplay->SetCapabilityFlags(device::Position | device::Orientation | device::Present | device::StageParameters);
+  m.immersiveDisplay->SetCapabilityFlags(device::Position | device::Orientation | device::Present | device::StageParameters |
+                                         device::InlineSession | device::ImmersiveVRSession);
   m.immersiveDisplay->SetSittingToStandingTransform(vrb::Matrix::Translation(kAverageHeight));
   gvr_sizei size = m.GetRecommendedImmersiveModeSize();
   m.immersiveDisplay->SetEyeResolution(size.width / 2, size.height);

app/src/main/cpp/Device.h

@@ -19,6 +19,9 @@ const CapabilityFlags LinearAcceleration = 1u << 6u;
 const CapabilityFlags StageParameters = 1u << 7u;
 const CapabilityFlags MountDetection = 1u << 8u;
 const CapabilityFlags PositionEmulated = 1u << 9u;
+const CapabilityFlags InlineSession = 1u << 10u;
+const CapabilityFlags ImmersiveVRSession = 1u << 11u;
+const CapabilityFlags ImmersiveARSession = 1u << 12u;
 enum class Eye { Left, Right };
 enum class RenderMode { StandAlone, Immersive };
 enum class CPULevel { Normal = 0, High };

app/src/main/cpp/ExternalVR.cpp

@@ -254,6 +254,15 @@ ExternalVR::SetCapabilityFlags(const device::CapabilityFlags aFlags) {
   if (device::PositionEmulated & aFlags) {
     result |= static_cast<uint16_t>(mozilla::gfx::VRDisplayCapabilityFlags::Cap_PositionEmulated);
   }
+  if (device::InlineSession & aFlags) {
+    result |= static_cast<uint16_t>(mozilla::gfx::VRDisplayCapabilityFlags::Cap_Inline);
+  }
+  if (device::ImmersiveVRSession & aFlags) {
+    result |= static_cast<uint16_t>(mozilla::gfx::VRDisplayCapabilityFlags::Cap_ImmersiveVR);
+  }
+  if (device::ImmersiveARSession & aFlags) {
+    result |= static_cast<uint16_t>(mozilla::gfx::VRDisplayCapabilityFlags::Cap_ImmersiveAR);
+  }
   //m.deviceCapabilities = aFlags;
   m.system.displayState.capabilityFlags = static_cast<mozilla::gfx::VRDisplayCapabilityFlags>(result);
   m.system.sensorState.flags = m.system.displayState.capabilityFlags;

app/src/noapi/cpp/DeviceDelegateNoAPI.cpp

@@ -94,7 +94,7 @@ struct DeviceDelegateNoAPI::State {
       display->SetEyeResolution((int32_t)(glWidth / 2), glHeight);
       display->SetEyeOffset(device::Eye::Left, 0.0f, 0.0f, 0.0f);
       display->SetEyeOffset(device::Eye::Right, 0.0f, 0.0f, 0.0f);
-      display->SetCapabilityFlags(device::Position | device::Orientation | device::Present);
+      display->SetCapabilityFlags(device::Position | device::Orientation | device::Present | device::InlineSession | device::ImmersiveVRSession);
     }
   }
 };

app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp

@@ -1458,7 +1458,8 @@ DeviceDelegateOculusVR::StartFrame() {
   if (m.immersiveDisplay) {
     m.immersiveDisplay->SetEyeOffset(device::Eye::Left, -ipd * 0.5f, 0.f, 0.f);
     m.immersiveDisplay->SetEyeOffset(device::Eye::Right, ipd * 0.5f, 0.f, 0.f);
-    device::CapabilityFlags caps = device::Orientation | device::Present | device::StageParameters;
+    device::CapabilityFlags caps = device::Orientation | device::Present | device::StageParameters |
+                                   device::InlineSession | device::ImmersiveVRSession;
     if (m.predictedTracking.Status & VRAPI_TRACKING_STATUS_POSITION_TRACKED) {
       caps |= device::Position;
     } else {

app/src/svr/cpp/DeviceDelegateSVR.cpp

@@ -337,7 +337,8 @@ DeviceDelegateSVR::RegisterImmersiveDisplay(ImmersiveDisplayPtr aDisplay) {
   }
 
   m.immersiveDisplay->SetDeviceName("ODG");
-  m.immersiveDisplay->SetCapabilityFlags(device::Position | device::Orientation | device::Present);
+  m.immersiveDisplay->SetCapabilityFlags(device::Position | device::Orientation | device::Present |
+                                         device::InlineSession | device::ImmersiveVRSession);
   m.immersiveDisplay->SetEyeResolution(m.renderWidth, m.renderHeight);
   m.immersiveDisplay->CompleteEnumeration();
 

app/src/wavevr/cpp/DeviceDelegateWaveVR.cpp

@@ -461,7 +461,8 @@ DeviceDelegateWaveVR::RegisterImmersiveDisplay(ImmersiveDisplayPtr aDisplay) {
   }
 
   m.immersiveDisplay->SetDeviceName("Wave");
-  device::CapabilityFlags flags = device::Orientation | device::Present | device::StageParameters;
+  device::CapabilityFlags flags = device::Orientation | device::Present | device::StageParameters |
+                                  device::InlineSession | device::ImmersiveVRSession;
 
   if (WVR_GetDegreeOfFreedom(WVR_DeviceType_HMD) == WVR_NumDoF_6DoF) {
     flags |= device::Position;