From 8bd8195e300257e890be6edd4a8318cd74f9e339 Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Wed, 19 Oct 2022 10:03:01 -0700
Subject: [PATCH] Disable canvas ImageBitmap optimization on Safari

Fixes #4218
---
 addons/xterm-addon-canvas/src/BaseRenderLayer.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/addons/xterm-addon-canvas/src/BaseRenderLayer.ts b/addons/xterm-addon-canvas/src/BaseRenderLayer.ts
index ccd1f56f..67d459f7 100644
--- a/addons/xterm-addon-canvas/src/BaseRenderLayer.ts
+++ b/addons/xterm-addon-canvas/src/BaseRenderLayer.ts
@@ -20,6 +20,7 @@ import { Terminal } from 'xterm';
 import { IRenderLayer } from './Types';
 import { CellColorResolver } from 'browser/renderer/shared/CellColorResolver';
 import { Disposable, toDisposable } from 'common/Lifecycle';
+import { isSafari } from 'common/Platform';
 
 export abstract class BaseRenderLayer extends Disposable implements IRenderLayer {
   private _canvas: HTMLCanvasElement;
@@ -434,6 +435,10 @@ class BitmapGenerator {
   public refresh(): void {
     // Clear the bitmap immediately as it's stale
     this._bitmap = undefined;
+    // Disable ImageBitmaps on Safari because of https://bugs.webkit.org/show_bug.cgi?id=149990
+    if (isSafari) {
+      return;
+    }
     if (this._commitTimeout === undefined) {
       this._commitTimeout = window.setTimeout(() => this._generate(), GLYPH_BITMAP_COMMIT_DELAY);
     }