From b89a7ee8b956c96a1dcee995ea840feddc5d4b27 Mon Sep 17 00:00:00 2001
From: Pierre Frisch
Date: Thu, 22 Dec 2011 07:25:50 -0800
Subject: First commit of Ninja to ninja-internal

Signed-off-by: Valerio Virgillito <rmwh84@motorola.com>
---
 .../RDGE/src/core/script/util/fpsTracker.js        | 51 ++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 js/helper-classes/RDGE/src/core/script/util/fpsTracker.js

(limited to 'js/helper-classes/RDGE/src/core/script/util/fpsTracker.js')

diff --git a/js/helper-classes/RDGE/src/core/script/util/fpsTracker.js b/js/helper-classes/RDGE/src/core/script/util/fpsTracker.js
new file mode 100644
index 00000000..0b6cdd84
--- /dev/null
+++ b/js/helper-classes/RDGE/src/core/script/util/fpsTracker.js
@@ -0,0 +1,51 @@
+/* <copyright>
+This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
+No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
+(c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
+</copyright> */
+
+fpsTracker = function (id) {
+    this.id = id;
+    this.fpsRaw = new stat(id + "_fps", "raw", 0, null, false);
+    this.fpsAvg = new stat(id + "_fps", "avg", 0, null, false);
+    this.fpsMin = new stat(id + "_fps", "min", 0, null, false);
+    this.fpsMax = new stat(id + "_fps", "max", 0, null, false);
+    this.samples = [];
+    this.maxSamples = 10;
+    this.timeStampMS = 0.0;
+    this.reportInterval = 500;
+    
+    this.close = function() {
+        stat.pages[id + "_fps"] = null;
+    }
+
+    this.sample = function() {
+        var currMS = new Date().getTime();
+        this.samples.push(currMS - this.timeStampMS);
+        if (this.samples.length > this.maxSamples) {
+            this.samples.shift();
+        }
+        this.timeStampMS = currMS;
+        var accum = 0.0;
+        var fmin = -1e10;
+        var fmax = 1e10;
+        var i = this.samples.length - 1;
+        while (i >= 0) {
+            accum += this.samples[i];
+            fmin = Math.max(fmin, this.samples[i]);
+            fmax = Math.min(fmax, this.samples[i]);
+            i--;
+        }
+        var denom = this.samples.length > 0 ? accum / this.samples.length : 0;
+        var avgFPS = denom > 0 ? 1000 / denom : 0;
+        var minFPS = fmin > 0 ? 1000 / fmin : 0;
+        var maxFPS = fmax > 0 ? 1000 / fmax : 0;
+        var lastSample = this.samples[this.samples.length - 1];
+        var rawFPS = (lastSample > 0) ? 1000 / lastSample : 0;
+
+        this.fpsRaw.value = rawFPS.toFixed(2);
+        this.fpsAvg.value = avgFPS.toFixed(2);
+        this.fpsMin.value = minFPS.toFixed(2);
+        this.fpsMax.value = maxFPS.toFixed(2);
+    }
+}   
\ No newline at end of file
-- 
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