From cb2b59b48b6cf8aeb17f5b0f9f4063e8340ce144 Mon Sep 17 00:00:00 2001
From: Don Kjer <don@lindenlab.com>
Date: Tue, 10 Jul 2012 00:42:10 +0000
Subject: Added new settings: DisableAllRenderTypes, DisableAllRenderFeatures,
 and MaxFPS.

---
 indra/newview/llappviewer.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'indra/newview/llappviewer.cpp')

diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index efa24796e5..f01f62c798 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -632,6 +632,7 @@ LLAppViewer::LLAppViewer() :
 	mQuitRequested(false),
 	mLogoutRequestSent(false),
 	mYieldTime(-1),
+	mMinFrameTime(-1.0),
 	mMainloopTimeout(NULL),
 	mAgentRegionLastAlive(false),
 	mRandomizeFramerate(LLCachedControl<bool>(gSavedSettings,"Randomize Framerate", FALSE)),
@@ -1465,6 +1466,19 @@ bool LLAppViewer::mainLoop()
 				{
 					gFrameStalls++;
 				}
+
+				// Limit FPS
+				if (mMinFrameTime > F_APPROXIMATELY_ZERO)
+				{
+					// Sleep a while to limit frame rate.
+					S32 milliseconds_to_sleep = llclamp((S32)((mMinFrameTime - frameTimer.getElapsedTimeF64()) * 1000.f), 0, 1000);
+					if (milliseconds_to_sleep > 0)
+					{
+						LLFastTimer t(FTM_YIELD);
+						ms_sleep(milliseconds_to_sleep);
+					}
+				}
+
 				frameTimer.reset();
 
 				resumeMainloopTimeout();
@@ -2577,6 +2591,12 @@ bool LLAppViewer::initConfiguration()
 	}
 
     mYieldTime = gSavedSettings.getS32("YieldTime");
+	mMinFrameTime = -1.0f;
+	F32 max_fps = gSavedSettings.getF32("MaxFPS");
+	if (max_fps > F_APPROXIMATELY_ZERO)
+	{
+		mMinFrameTime = 1.0f / max_fps;
+	}
 
 	// Read skin/branding settings if specified.
 	//if (! gDirUtilp->getSkinDir().empty() )
-- 
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