#1341: catch paint errors and report them to the server

git-svn-id: https://xpra.org/svn/Xpra/trunk@14617 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/html5/js/Client.js

@@ -1501,29 +1501,35 @@ XpraClient.prototype._process_draw_queue = function(packet, ctx){
 	var win = ctx.id_to_window[wid];
 	var decode_time = -1;
 	if (win) {
-		win.paint(x, y,
-			width, height,
-			coding, data, packet_sequence, rowstride, options,
-			function (ctx) {
-				var flush = options["flush"] || 0;
-				if(flush==0) {
-					// request that drawing to screen takes place at next available opportunity if possible
-					if(requestAnimationFrame) {
-						requestAnimationFrame(function() {
+		try {
+			win.paint(x, y,
+				width, height,
+				coding, data, packet_sequence, rowstride, options,
+				function (ctx) {
+					var flush = options["flush"] || 0;
+					if(flush==0) {
+						// request that drawing to screen takes place at next available opportunity if possible
+						if(requestAnimationFrame) {
+							requestAnimationFrame(function() {
+								win.draw();
+							});
+						} else {
+							// requestAnimationFrame is not available, draw immediately
 							win.draw();
-						});
-					} else {
-						// requestAnimationFrame is not available, draw immediately
-						win.draw();
+						}
 					}
+					decode_time = new Date().getTime() - start;
+					if(ctx.debug) {
+						console.debug("decode time for ", coding, " sequence ", packet_sequence, ": ", decode_time);
+					}
+					ctx._window_send_damage_sequence(wid, packet_sequence, width, height, decode_time);
 				}
-				decode_time = new Date().getTime() - start;
-				if(ctx.debug) {
-					console.debug("decode time for ", coding, " sequence ", packet_sequence, ": ", decode_time);
-				}
-				ctx._window_send_damage_sequence(wid, packet_sequence, width, height, decode_time);
-			}
-		);
+			);
+		}
+		catch(e) {
+			ctx.error('error painting', coding, e);
+			ctx._window_send_damage_sequence(wid, packet_sequence, width, height, -1, String(e));
+		}
 	}
 }