Implement WebVR presentation pausing for VR Shell Menu Mode

third_party/WebKit/Source/modules/vr/VRDisplay.cpp

 // 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 "modules/vr/VRDisplay.h"
 
 #include "core/dom/DOMException.h"
 #include "core/dom/FrameRequestCallback.h"
 #include "core/dom/Fullscreen.h"
 #include "core/dom/ScriptedAnimationController.h"
@@ skipping 51 matching lines @@
       m_displayId(0),
       m_isConnected(false),
       m_isPresenting(false),
       m_canUpdateFramePose(true),
       m_capabilities(new VRDisplayCapabilities()),
       m_eyeParametersLeft(new VREyeParameters()),
       m_eyeParametersRight(new VREyeParameters()),
       m_depthNear(0.01),
       m_depthFar(10000.0),
       m_fullscreenCheckTimer(this, &VRDisplay::onFullscreenCheck),
+      m_contextGL(nullptr),
       m_animationCallbackRequested(false),
       m_inAnimationFrame(false) {}
 
 VRDisplay::~VRDisplay() {}
 
 VRController* VRDisplay::controller() {
   return m_navigatorVR->controller();
 }
 
 void VRDisplay::update(const device::blink::VRDisplayPtr& display) {
@@ skipping 85 matching lines @@
   callback->m_useLegacyTimeBase = false;
   return ensureScriptedAnimationController(doc).registerCallback(callback);
 }
 
 void VRDisplay::cancelAnimationFrame(int id) {
   if (!m_scriptedAnimationController)
     return;
   m_scriptedAnimationController->cancelCallback(id);
 }
 
+void VRDisplay::pausePresent() {
+  Document* doc = m_navigatorVR->document();
+  if (!doc)
+    return;
+  doc->suspendScheduledTasks();
+  m_scriptedAnimationController->suspend();

[bajones, 2016/11/01 18:11:31]

This would be the perfect place to fire the "vrdisplayblur" event. Please do so!
(https://w3c.github.io/webvr/#window-onvrdisplayblur-event)

[mthiesse, 2016/11/02 14:39:02]

Done.

+}
+
+void VRDisplay::resumePresent() {
+  Document* doc = m_navigatorVR->document();
+  if (!doc)
+    return;
+  m_scriptedAnimationController->resume();
+  doc->resumeScheduledTasks();

[bajones, 2016/11/01 18:11:31]

Likewise, let's fire "vrdisplayfocus" here.

[mthiesse, 2016/11/02 14:39:02]

Done.

+}
+
 void VRDisplay::serviceScriptedAnimations(double monotonicAnimationStartTime) {
   if (!m_scriptedAnimationController)
     return;
   AutoReset<bool> animating(&m_inAnimationFrame, true);
   m_animationCallbackRequested = false;
   m_scriptedAnimationController->serviceScriptedAnimations(
       monotonicAnimationStartTime);
 }
 
 void ReportPresentationResult(PresentationResult result) {
@@ skipping 312 matching lines @@
   visitor->trace(m_capabilities);
   visitor->trace(m_stageParameters);
   visitor->trace(m_eyeParametersLeft);
   visitor->trace(m_eyeParametersRight);
   visitor->trace(m_layer);
   visitor->trace(m_renderingContext);
   visitor->trace(m_scriptedAnimationController);
 }
 
 }  // namespace blink