From b2b95e8556454a1831f45747f36722d95ed8603c Mon Sep 17 00:00:00 2001
From: Alistair Buxton <a.j.buxton@gmail.com>
Date: Sat, 31 Oct 2020 01:59:00 +0000
Subject: [PATCH] Correctly set the rightmost tile property when flipped

This ensures that seams are not visible in Firefox and Safari when
the image is wrapped horizontally and also flipped.
---
 src/tiledimage.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/tiledimage.js b/src/tiledimage.js
index 1e55b914..c3712aca 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -1526,8 +1526,14 @@ function getTile(
             sourceBounds
         );
 
-        if (xMod === numTiles.x - 1) {
-            tile.isRightMost = true;
+        if (tiledImage.getFlip()) {
+            if (xMod === 0) {
+                tile.isRightMost = true;
+            }
+        } else {
+            if (xMod === numTiles.x - 1) {
+                tile.isRightMost = true;
+            }
         }
 
         if (yMod === numTiles.y - 1) {