From 2b38b653929ee18078930d78023e3864e758a272 Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Wed, 7 May 2025 08:05:22 -0700
Subject: [PATCH] webgl: Ignore alpha channel when allowTransparency is false

Fixes #5255
Part of microsoft/vscode#204663
---
 addons/addon-webgl/src/TextureAtlas.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/addons/addon-webgl/src/TextureAtlas.ts b/addons/addon-webgl/src/TextureAtlas.ts
index a7d1138e..330c6275 100644
--- a/addons/addon-webgl/src/TextureAtlas.ts
+++ b/addons/addon-webgl/src/TextureAtlas.ts
@@ -306,6 +306,11 @@ export class TextureAtlas implements ITextureAtlas {
         break;
     }
 
+    // Ignore alpha channel when allowTransparency is false
+    if (!this._config.allowTransparency) {
+      result = color.opaque(result);
+    }
+
     return result;
   }