From e2a11da5da79a6c0042d7dddafc965d53d3026fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nico=20H=C3=B6llerich?= <s1nihoel@uni-bayreuth.de>
Date: Sun, 7 Jun 2020 16:50:04 +0200
Subject: [PATCH] Fix tile prioritization and image loader.

---
 doc/json-config-parameters.md | 4 ++--
 src/js/libpannellum.js        | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/doc/json-config-parameters.md b/doc/json-config-parameters.md
index ef9cf0b..59469c4 100644
--- a/doc/json-config-parameters.md
+++ b/doc/json-config-parameters.md
@@ -452,9 +452,9 @@ This specifies the maximum zoom level.
 
 #### `loader` (function)
 
-Supply a loader function instead of an URL to load tiles.
+Supply an async loader function instead of an URL to load tiles.
 
-Input: node, HTMLImageElement. Output: Promise
+Input: node, HTMLImageElement. Resolved output: HTMLCanvasElement, ImageBitmap, HTMLImageElement
 
 Node has the following properties: `x` (number), `y` (number),
 `level` (number), `vertices` ([[number]]) part of the full image 
diff --git a/src/js/libpannellum.js b/src/js/libpannellum.js
index 808ca6f..c3bf59a 100644
--- a/src/js/libpannellum.js
+++ b/src/js/libpannellum.js
@@ -1900,6 +1900,7 @@ function Renderer(container) {
                     releaseTextureImageLoader(this);
                 }).catch(() => {
                     this.callback(this.texture, false);
+                    releaseTextureImageLoader(this);
                 });
             } else {
                 this.image.src = src;
@@ -2100,6 +2101,8 @@ function Renderer(container) {
     * @param {number} hfov - Horizontal field of view to check at.
     */
     function checkMultiresNodeInView(node, yaw, pitch, roll, hfov) {
+        let v = node.vertices;
+
         // Create rotation matrix
         var matrix = identityMatrix3();
         matrix = rotateMatrix(matrix, -yaw, 'y');