From c734de531fd94cbbd912f96be046b953ccf65399 Mon Sep 17 00:00:00 2001
From: Tom <tmpearce@gmail.com>
Date: Fri, 9 Feb 2024 17:18:54 -0500
Subject: [PATCH] fix placeholder positioning for canvas drawer

---
 src/canvasdrawer.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/canvasdrawer.js b/src/canvasdrawer.js
index d4ec6231..2ec6b17b 100644
--- a/src/canvasdrawer.js
+++ b/src/canvasdrawer.js
@@ -382,9 +382,9 @@ class CanvasDrawer extends OpenSeadragon.DrawerBase{
             }
             usedClip = true;
         }
-
+        tiledImage._hasOpaqueTile = false;
         if ( tiledImage.placeholderFillStyle && tiledImage._hasOpaqueTile === false ) {
-            var placeholderRect = this.viewportToDrawerRectangle(tiledImage.getBounds(true));
+            let placeholderRect = this.viewportToDrawerRectangle(tiledImage.getBoundsNoRotate(true));
             if (sketchScale) {
                 placeholderRect = placeholderRect.times(sketchScale);
             }
@@ -392,7 +392,7 @@ class CanvasDrawer extends OpenSeadragon.DrawerBase{
                 placeholderRect = placeholderRect.translate(sketchTranslate);
             }
 
-            var fillStyle = null;
+            let fillStyle = null;
             if ( typeof tiledImage.placeholderFillStyle === "function" ) {
                 fillStyle = tiledImage.placeholderFillStyle(tiledImage, this.context);
             }
@@ -402,7 +402,9 @@ class CanvasDrawer extends OpenSeadragon.DrawerBase{
 
             this._drawRectangle(placeholderRect, fillStyle, useSketch);
         }
-
+        if(!window.draw){
+            lastDrawn = [];
+        }
         var subPixelRoundingRule = determineSubPixelRoundingRule(tiledImage.subPixelRoundingForTransparency);
 
         var shouldRoundPositionAndSize = false;