From 7f748153c5e0068120e4ed029d7813340285a848 Mon Sep 17 00:00:00 2001
From: Howard Stearns <howard@highfidelity.io>
Date: Thu, 21 Apr 2016 14:41:30 -0700
Subject: [PATCH] Mac code for gpu memory.

---
 libraries/render/src/render/Task.h  |  3 ---
 libraries/shared/src/GPUIdent.cpp   | 27 ++++++++++++++++++++++++++-
 libraries/shared/src/SharedUtil.cpp |  1 -
 3 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/libraries/render/src/render/Task.h b/libraries/render/src/render/Task.h
index 9e8274b802..300c0efd56 100644
--- a/libraries/render/src/render/Task.h
+++ b/libraries/render/src/render/Task.h
@@ -18,7 +18,6 @@
 #include <QtCore/qjsonobject.h>
 #include <QtCore/qjsonvalue.h>
 #include <shared/JSONHelpers.h>
-#include <GPUIdent.h>
 
 #include "SettingHandle.h"
 
@@ -180,8 +179,6 @@ public:
 
     // getter for qml integration, prefer the templated getter
     Q_INVOKABLE QObject* getConfig(const QString& name) { return QObject::findChild<JobConfig*>(name); }
-    Q_INVOKABLE uint getVRam() { return GPUIdent::getInstance()->getMemory(); }
-    Q_INVOKABLE QString getVCard() { return GPUIdent::getInstance()->getName(); }
     // getter for cpp (strictly typed), prefer this getter
     template <class T> typename T::Config* getConfig(std::string job = "") const {
         QString name = job.empty() ? QString() : QString(job.c_str()); // an empty string is not a null string
diff --git a/libraries/shared/src/GPUIdent.cpp b/libraries/shared/src/GPUIdent.cpp
index 92bb961400..957c4232ff 100644
--- a/libraries/shared/src/GPUIdent.cpp
+++ b/libraries/shared/src/GPUIdent.cpp
@@ -9,9 +9,13 @@
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 
 #include <QtCore/QtGlobal>
+
 #ifdef Q_OS_WIN
 #include <atlbase.h>
 #include <Wbemidl.h>
+
+#elif defined(Q_OS_MAC)
+#include <OpenGL/OpenGL.h>
 #endif
 
 #include "SharedLogging.h"
@@ -26,7 +30,28 @@ GPUIdent* GPUIdent::ensureQuery(const QString& vendor, const QString& renderer)
         return this;
     }
     _isQueried = true;  // Don't try again, even if not _isValid;
-#ifdef Q_OS_WIN
+#if (defined Q_OS_MAC)
+    GLuint cglDisplayMask = -1; // Iterate over all of them.
+    CGLRendererInfoObj rendererInfo;
+    GLint rendererInfoCount;
+    CGLError err = CGLQueryRendererInfo(cglDisplayMask, &rendererInfo, &rendererInfoCount);
+    GLint j, numRenderers = 0, deviceVRAM, bestVRAM = 0;
+    err = CGLQueryRendererInfo(cglDisplayMask, &rendererInfo, &numRenderers);
+    if (0 == err) {
+        // Iterate over all of them and use the figure for the one with the most VRAM,
+        // on the assumption that this is the one that will actually be used.
+        CGLDescribeRenderer(rendererInfo, 0, kCGLRPRendererCount, &numRenderers);
+        for (j = 0; j < numRenderers; j++) {
+            CGLDescribeRenderer(rendererInfo, j, kCGLRPVideoMemoryMegabytes, &deviceVRAM);
+            if (deviceVRAM > bestVRAM) {
+                bestVRAM = deviceVRAM;
+            }
+        }
+    }
+    _dedicatedMemoryMB = bestVRAM;
+    CGLDestroyRendererInfo(rendererInfo);
+
+#elif defined(Q_OS_WIN)
     // COM must be initialized already using CoInitialize. E.g., by the audio subsystem.
     CComPtr<IWbemLocator> spLoc = NULL;
     HRESULT hr = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_SERVER, IID_IWbemLocator, (LPVOID *)&spLoc);
diff --git a/libraries/shared/src/SharedUtil.cpp b/libraries/shared/src/SharedUtil.cpp
index c116e99576..8f68e20222 100644
--- a/libraries/shared/src/SharedUtil.cpp
+++ b/libraries/shared/src/SharedUtil.cpp
@@ -26,7 +26,6 @@
 #ifdef Q_OS_WIN
 #include "CPUIdent.h"
 #endif
-#include "GPUIdent.h"
 
 
 #ifdef __APPLE__