From 834a2a5c3b2f2241a379175bfcab80db721b1639 Mon Sep 17 00:00:00 2001
From: Zach Fox <fox@highfidelity.io>
Date: Thu, 15 Jun 2017 12:49:09 -0700
Subject: [PATCH] Ensure monitor never shows frozen SpectatorCamera preview

---
 .../src/display-plugins/hmd/HmdDisplayPlugin.cpp | 16 ++++++++++++++++
 .../src/display-plugins/hmd/HmdDisplayPlugin.h   |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.cpp b/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.cpp
index ea91890f33..260ac5fa4c 100644
--- a/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.cpp
+++ b/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.cpp
@@ -743,3 +743,19 @@ HmdDisplayPlugin::~HmdDisplayPlugin() {
 float HmdDisplayPlugin::stutterRate() const {
     return _stutterRate.rate();
 }
+
+bool HmdDisplayPlugin::setDisplayTexture(const QString& name) {
+    // Note: it is the caller's responsibility to keep the network texture in cache.
+    if (name.isEmpty()) {
+        _displayTexture.reset();
+        _clearPreviewFlag = true;
+        return true;
+    }
+    auto textureCache = DependencyManager::get<TextureCache>();
+    auto displayNetworkTexture = textureCache->getTexture(name);
+    if (!displayNetworkTexture) {
+        return false;
+    }
+    _displayTexture = displayNetworkTexture->getGPUTexture();
+    return !!_displayTexture;
+}
diff --git a/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.h b/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.h
index aaa6e347e0..78b3889179 100644
--- a/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.h
+++ b/libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.h
@@ -46,6 +46,8 @@ public:
 
     float stutterRate() const override;
 
+    virtual bool setDisplayTexture(const QString& name) override;
+
 protected:
     virtual void hmdPresent() = 0;
     virtual bool isHmdMounted() const = 0;