From 8b71876c37d99953475d64cf12c972c4d8d7182a Mon Sep 17 00:00:00 2001
From: Grant Echols <gechols@ldschurch.org>
Date: Mon, 6 Jul 2015 14:56:41 -0600
Subject: [PATCH 1/3] Added error message tracking into the tile loading
 mechanism. This exposes the reason for the error in the console.log message

---
 src/imageloader.js | 5 ++++-
 src/tiledimage.js  | 8 ++++----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/imageloader.js b/src/imageloader.js
index a61c8936..ef3a4f4f 100644
--- a/src/imageloader.js
+++ b/src/imageloader.js
@@ -51,6 +51,7 @@ function ImageJob ( options ) {
 }
 
 ImageJob.prototype = {
+    errorMsg: null,
     start: function(){
         var _this = this;
 
@@ -64,10 +65,12 @@ ImageJob.prototype = {
             _this.finish( true );
         };
         this.image.onabort = this.image.onerror = function(){
+            _this.errorMsg = "Image load aborted";
             _this.finish( false );
         };
 
         this.jobId = window.setTimeout( function(){
+            _this.errorMsg = "Image load exceeded timeout";
             _this.finish( false );
         }, this.timeout);
 
@@ -173,7 +176,7 @@ function completeJob( loader, job, callback ) {
         loader.jobsInProgress++;
     }
 
-    callback( job.image );
+    callback( job.image, job.errorMsg );
 }
 
 }( OpenSeadragon ));
diff --git a/src/tiledimage.js b/src/tiledimage.js
index 363df7c6..f4f9ee3f 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -1011,8 +1011,8 @@ function loadTile( tiledImage, tile, time ) {
     tiledImage._imageLoader.addJob({
         src: tile.url,
         crossOriginPolicy: tiledImage.crossOriginPolicy,
-        callback: function( image ){
-            onTileLoad( tiledImage, tile, time, image );
+        callback: function( image, errorMsg ){
+            onTileLoad( tiledImage, tile, time, image, errorMsg );
         },
         abort: function() {
             tile.loading = false;
@@ -1020,9 +1020,9 @@ function loadTile( tiledImage, tile, time ) {
     });
 }
 
-function onTileLoad( tiledImage, tile, time, image ) {
+function onTileLoad( tiledImage, tile, time, image, errorMsg ) {
     if ( !image ) {
-        $.console.log( "Tile %s failed to load: %s", tile, tile.url );
+        $.console.log( "Tile %s failed to load: %s", tile.url, errorMsg );
         if( !tiledImage.debugMode ){
             tile.loading = false;
             tile.exists = false;

From 9629f47c2c1adbcf7d59d5872e2d8a32b9578b2d Mon Sep 17 00:00:00 2001
From: Grant Echols <gechols@ldschurch.org>
Date: Mon, 6 Jul 2015 15:06:00 -0600
Subject: [PATCH 2/3] Added error message tracking into the tile loading
 mechanism. This exposes the reason for the error in the console.log message

---
 src/tiledimage.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tiledimage.js b/src/tiledimage.js
index f4f9ee3f..43285d4d 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -1022,7 +1022,7 @@ function loadTile( tiledImage, tile, time ) {
 
 function onTileLoad( tiledImage, tile, time, image, errorMsg ) {
     if ( !image ) {
-        $.console.log( "Tile %s failed to load: %s", tile.url, errorMsg );
+        $.console.log( "Tile %s failed to load: %s - error:", tile, tile.url, errorMsg );
         if( !tiledImage.debugMode ){
             tile.loading = false;
             tile.exists = false;

From 553948781486bed2e2a6cef046e56be78f4855fc Mon Sep 17 00:00:00 2001
From: Grant Echols <gechols@ldschurch.org>
Date: Mon, 6 Jul 2015 15:07:00 -0600
Subject: [PATCH 3/3] Added error message tracking into the tile loading
 mechanism. This exposes the reason for the error in the console.log message

---
 src/tiledimage.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tiledimage.js b/src/tiledimage.js
index 43285d4d..960d91d9 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -1022,7 +1022,7 @@ function loadTile( tiledImage, tile, time ) {
 
 function onTileLoad( tiledImage, tile, time, image, errorMsg ) {
     if ( !image ) {
-        $.console.log( "Tile %s failed to load: %s - error:", tile, tile.url, errorMsg );
+        $.console.log( "Tile %s failed to load: %s - error: %s", tile, tile.url, errorMsg );
         if( !tiledImage.debugMode ){
             tile.loading = false;
             tile.exists = false;