Migrate WebVR Cardboard implementation to GVR

device/vr/android/gvr/gvr_device_provider.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "device/vr/android/gvr/gvr_device_provider.h"
+
+#include "base/android/context_utils.h"
+#include "base/android/jni_android.h"
+#include "base/android/jni_utils.h"
+#include "base/android/scoped_java_ref.h"
+#include "device/vr/android/gvr/gvr_device.h"
+#include "jni/GvrDeviceProvider_jni.h"
+
+using base::android::AttachCurrentThread;
+using base::android::GetApplicationContext;
+
+namespace device {
+
+GvrDeviceProvider::GvrDeviceProvider() : VRDeviceProvider() {
+  GvrApiManager::GetInstance()->AddClient(this);
+}
+
+GvrDeviceProvider::~GvrDeviceProvider() {
+  // TODO: This should eventually be handled by an actual GvrLayout instance in
+  // the view tree.
+  GvrApiManager::GetInstance()->Shutdown();
+  if (!j_device_.is_null()) {
+    JNIEnv* env = AttachCurrentThread();
+    Java_GvrDeviceProvider_shutdown(env, j_device_.obj());
+  }
+
+  GvrApiManager::GetInstance()->RemoveClient(this);
+}
+
+void GvrDeviceProvider::GetDevices(std::vector<VRDevice*>* devices) {
+  Initialize();
+
+  if (vr_device_)
+    devices->push_back(vr_device_.get());
+}
+
+void GvrDeviceProvider::Initialize() {
+  // TODO: This should eventually be handled by an actual GvrLayout instance in
+  // the view tree.
+  if (j_device_.is_null()) {
+    JNIEnv* env = AttachCurrentThread();
+
+    j_device_.Reset(
+        Java_GvrDeviceProvider_create(env, GetApplicationContext()));
+    jlong gvr_api =
+        Java_GvrDeviceProvider_getNativeContext(env, j_device_.obj());
+
+    if (!gvr_api)
+      return;
+
+    GvrApiManager::GetInstance()->Initialize(
+        reinterpret_cast<gvr_context*>(gvr_api));
+  }
+}
+
+void GvrDeviceProvider::OnGvrApiInitialized(gvr::GvrApi* gvr_api) {
+  if (!vr_device_)
+    vr_device_.reset(new GvrDevice(this, gvr_api));
+
+  // Should fire a vrdisplayconnected event here.
+}
+
+void GvrDeviceProvider::OnGvrApiShutdown() {
+  // Nothing to do here just yet. Eventually want to shut down the VRDevice
+}
+
+}  // namespace device