From deb08476ef58635396d6ed03ee7a14294cdca2a4 Mon Sep 17 00:00:00 2001
From: Caspian Rychlik-Prince <cprince@puppygames.net>
Date: Fri, 9 Jul 2004 11:20:14 +0000
Subject: [PATCH] Added experimental sync2() method to Display. We'll see which
 one works best and remove the worst one.

---
 src/java/org/lwjgl/opengl/Display.java | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/java/org/lwjgl/opengl/Display.java b/src/java/org/lwjgl/opengl/Display.java
index b5873290..a6bbe4b7 100644
--- a/src/java/org/lwjgl/opengl/Display.java
+++ b/src/java/org/lwjgl/opengl/Display.java
@@ -284,6 +284,28 @@ public final class Display {
 		}
 		timeThen = timeNow;
 	}
+	
+	/**
+	 * Alternative sync method which works better on triple-buffered GL displays.
+	 * @param fps The desired frame rate, in frames per second
+	 */
+	private static long timeLate;
+	public static void sync2(int fps) {
+		long gapTo = Sys.getTimerResolution() / fps + timeThen;
+		timeNow = Sys.getTime();
+
+		while (gapTo > timeNow + timeLate) {
+			Thread.yield();
+			timeNow = Sys.getTime();
+		}
+
+		if (gapTo < timeNow)
+			timeLate = timeNow - gapTo;
+		else
+			timeLate = 0;
+
+		timeThen = timeNow;
+	}
 
 	/**
 	 * Initialize and return the current display mode.