From 58f004352ab18cff8ef2715333e20e383321558c Mon Sep 17 00:00:00 2001
From: Sam <samuel.gateau@gmail.com>
Date: Wed, 4 Jul 2018 17:15:12 +0200
Subject: [PATCH] Added per pixel GPU stats

---
 interface/resources/qml/Stats.qml |  6 ++++++
 interface/src/ui/Stats.cpp        |  8 +++++++-
 interface/src/ui/Stats.h          | 16 ++++++++++++++++
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/interface/resources/qml/Stats.qml b/interface/resources/qml/Stats.qml
index 2406fa048d..bff13cea54 100644
--- a/interface/resources/qml/Stats.qml
+++ b/interface/resources/qml/Stats.qml
@@ -263,6 +263,12 @@ Item {
                     }
                     StatText {
                         text: "GPU: " + root.gpuFrameTime.toFixed(1) + " ms"
+                    }                    
+                    StatText {
+                        text: "GPU (Per pixel): " + root.gpuFrameTimePerPixel.toFixed(5) + " ns/pp"
+                    }                    
+                    StatText {
+                        text: "GPU frame size: " + root.gpuFrameSize.x + " x " + root.gpuFrameSize.y
                     }
                     StatText {
                         text: "Triangles: " + root.triangles +
diff --git a/interface/src/ui/Stats.cpp b/interface/src/ui/Stats.cpp
index c7ee868855..6bb615948c 100644
--- a/interface/src/ui/Stats.cpp
+++ b/interface/src/ui/Stats.cpp
@@ -333,7 +333,13 @@ void Stats::updateStats(bool force) {
     }
 
     auto gpuContext = qApp->getGPUContext();
-
+    auto displayPlugin = qApp->getActiveDisplayPlugin();
+    if (displayPlugin) {
+        QVector2D dims(displayPlugin->getRecommendedRenderSize().x, displayPlugin->getRecommendedRenderSize().y);
+        dims *= displayPlugin->getRenderResolutionScale();
+        STAT_UPDATE(gpuFrameSize, dims);
+        STAT_UPDATE(gpuFrameTimePerPixel, (float)(gpuContext->getFrameTimerGPUAverage()*1000000.0 / double(dims.x()*dims.y())));
+    }
     // Update Frame timing (in ms)
     STAT_UPDATE(gpuFrameTime, (float)gpuContext->getFrameTimerGPUAverage());
     STAT_UPDATE(batchFrameTime, (float)gpuContext->getFrameTimerBatchAverage());
diff --git a/interface/src/ui/Stats.h b/interface/src/ui/Stats.h
index 36e923261d..f4181f9788 100644
--- a/interface/src/ui/Stats.h
+++ b/interface/src/ui/Stats.h
@@ -276,7 +276,9 @@ class Stats : public QQuickItem {
     STATS_PROPERTY(int, gpuTextureExternalMemory, 0)
     STATS_PROPERTY(QString, gpuTextureMemoryPressureState, QString())
     STATS_PROPERTY(int, gpuFreeMemory, 0)
+    STATS_PROPERTY(QVector2D, gpuFrameSize, QVector2D(0,0))
     STATS_PROPERTY(float, gpuFrameTime, 0)
+    STATS_PROPERTY(float, gpuFrameTimePerPixel, 0)
     STATS_PROPERTY(float, batchFrameTime, 0)
     STATS_PROPERTY(float, engineFrameTime, 0)
     STATS_PROPERTY(float, avatarSimulationTime, 0)
@@ -962,6 +964,20 @@ signals:
      */
     void gpuFrameTimeChanged();
 
+    /**jsdoc
+     * Triggered when the value of the <code>gpuFrameTime</code> property changes.
+     * @function Stats.gpuFrameTimeChanged
+     * @returns {Signal}
+     */
+    void gpuFrameSizeChanged();
+
+    /**jsdoc
+     * Triggered when the value of the <code>gpuFrameTime</code> property changes.
+     * @function Stats.gpuFrameTimeChanged
+     * @returns {Signal}
+     */
+    void gpuFrameTimePerPixelChanged();
+
     /**jsdoc
      * Triggered when the value of the <code>batchFrameTime</code> property changes.
      * @function Stats.batchFrameTimeChanged