From 3129ef668abf2b3f9b624bdb4c5ac0365ae2583b Mon Sep 17 00:00:00 2001
From: runge <runge@karlrunge.com>
Date: Thu, 8 Oct 2009 17:30:36 -0400
Subject: Huge number of changes, see x11vnc/ChangeLog

---
 x11vnc/xdamage.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 55 insertions(+), 1 deletion(-)

(limited to 'x11vnc/xdamage.c')

diff --git a/x11vnc/xdamage.c b/x11vnc/xdamage.c
index 9db86ae..946aff2 100644
--- a/x11vnc/xdamage.c
+++ b/x11vnc/xdamage.c
@@ -56,6 +56,8 @@ int xdamage_max_area = 20000;	/* pixels */
 double xdamage_memory = 1.0;	/* in units of NSCAN */
 int xdamage_tile_count = 0, xdamage_direct_count = 0;
 double xdamage_scheduled_mark = 0.0;
+double xdamage_crazy_time = 0.0;
+double xdamage_crazy_delay = 300.0;
 sraRegionPtr xdamage_scheduled_mark_region = NULL;
 sraRegionPtr *xdamage_regions = NULL;
 int xdamage_ticker = 0;
@@ -400,6 +402,7 @@ int collect_xdamage(int scancnt, int call) {
 #define DUPSZ 32
 	int dup_x[DUPSZ], dup_y[DUPSZ], dup_w[DUPSZ], dup_h[DUPSZ];
 	double tm, dt;
+	int mark_all = 0, retries = 0, too_many = 1000, tot_ev = 0;
 
 	RAWFB_RET(0)
 
@@ -443,6 +446,9 @@ int collect_xdamage(int scancnt, int call) {
 	X_LOCK;
 if (0)	XFlush_wr(dpy);
 if (0)	XEventsQueued(dpy, QueuedAfterFlush);
+
+	come_back_for_more:
+
 	while (XCheckTypedEvent(dpy, xdamage_base_event_type+XDamageNotify, &ev)) {
 		/*
 		 * TODO max cut off time in this loop?
@@ -450,6 +456,26 @@ if (0)	XEventsQueued(dpy, QueuedAfterFlush);
 		 * screen.
 		 */
 		ecount++;
+		tot_ev++;
+
+		if (mark_all) {
+			continue;
+		}
+		if (ecount == too_many) {
+			int nqa = XEventsQueued(dpy, QueuedAlready);
+			if (nqa >= too_many) {
+				static double last_msg = 0.0;
+				tmpregion = sraRgnCreateRect(0, 0, dpy_x, dpy_y);
+				sraRgnOr(reg, tmpregion);
+				sraRgnDestroy(tmpregion);
+				if (dnow() > last_msg + xdamage_crazy_delay) {
+					rfbLog("collect_xdamage: too many xdamage events %d+%d\n", ecount, nqa);
+					last_msg = dnow();
+				}
+				mark_all = 1;
+			}
+		}
+
 		if (ev.type != xdamage_base_event_type + XDamageNotify) {
 			break;
 		}
@@ -537,12 +563,37 @@ if (0)	XEventsQueued(dpy, QueuedAfterFlush);
 		rect_count++;
 		ccount++;
 	}
+
+	if (mark_all) {
+		if (ecount + XEventsQueued(dpy, QueuedAlready) >= 3 * too_many && retries < 3) {
+			retries++;
+			XFlush_wr(dpy);
+			usleep(20 * 1000);
+			XFlush_wr(dpy);
+			ecount = 0;
+			goto come_back_for_more;
+		}
+	}
+
 	/* clear the whole damage region for next time. XXX check */
 	if (call == 1) {
 		XDamageSubtract(dpy, xdamage, None, None);
 	}
 	X_UNLOCK;
 
+	if (tot_ev > 20 * too_many) {
+		rfbLog("collect_xdamage: xdamage has gone crazy (screensaver or game?) ev: %d ret: %d\n", tot_ev, retries);
+		rfbLog("collect_xdamage: disabling xdamage for %d seconds.\n", (int) xdamage_crazy_delay);
+		destroy_xdamage_if_needed();
+		X_LOCK;
+		XSync(dpy, False);
+		while (XCheckTypedEvent(dpy, xdamage_base_event_type+XDamageNotify, &ev)) {
+			;
+		}
+		X_UNLOCK;
+		xdamage_crazy_time = dnow();
+	}
+
 	if (0 && xdamage_direct_count) {
 		fb_push();
 	}
@@ -726,7 +777,7 @@ void create_xdamage_if_needed(int force) {
 		xdamage = XDamageCreate(dpy, window, XDamageReportRawRectangles); 
 		XDamageSubtract(dpy, xdamage, None, None);
 		X_UNLOCK;
-		rfbLog("created xdamage object: 0x%lx\n", xdamage);
+		rfbLog("created   xdamage object: 0x%lx\n", xdamage);
 	}
 #endif
 }
@@ -762,6 +813,9 @@ void check_xdamage_state(void) {
 	 * Create or destroy the Damage object as needed, we don't want
 	 * one if no clients are connected.
 	 */
+	if (xdamage_crazy_time > 0.0 && dnow() < xdamage_crazy_time + xdamage_crazy_delay) {
+		return;
+	}
 	if (client_count && use_xdamage) {
 		create_xdamage_if_needed(0);
 		if (xdamage_scheduled_mark > 0.0 && dnow() >
-- 
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