From 5c615c3430cf1457d721f22a90808edc067fb6ea Mon Sep 17 00:00:00 2001
From: inmarket <andrewh@inmarket.com.au>
Date: Tue, 6 Oct 2015 17:27:24 +1000
Subject: [PATCH] Stop overwriting by the bounce ball when switching away from
 it in the applications/combo demo

---
 demos/applications/combo/bounce.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/demos/applications/combo/bounce.c b/demos/applications/combo/bounce.c
index 72e75af8..f0b78266 100644
--- a/demos/applications/combo/bounce.c
+++ b/demos/applications/combo/bounce.c
@@ -91,8 +91,6 @@ static DECLARE_THREAD_FUNCTION(task, param) {
 	minx = miny = 0; maxx = width; maxy = height;		// The clipping window for this frame.
 
 	while(run) {
-		gfxYield();
-
 		// Draw one frame
 		gdispStreamStart(winx+minx, winy+miny, maxx-minx, maxy-miny);
 		for (y=miny; h = (bally-y)*ii, y<maxy; y++) {
@@ -144,6 +142,9 @@ static DECLARE_THREAD_FUNCTION(task, param) {
 		ballx += dx; bally += dy;
 		dx = ballx < radius || ballx > width-radius ? spinspeed=-spinspeed,-dx : dx;
 		dy = bally > height-1.75*floor ? -.04*height : dy+.002*height;
+
+		// Give someone else a go on cooperative os's like RAW32
+		gfxYield();
 	}
 	return 0;
 }