From beec498457cb271c74207540febcd82cf6aab298 Mon Sep 17 00:00:00 2001
From: Julian Waller <git@julusian.co.uk>
Date: Thu, 21 Dec 2023 14:22:56 +0000
Subject: [PATCH] fix: expose `html.angle-backend` config field

---
 src/modules/html/html.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/modules/html/html.cpp b/src/modules/html/html.cpp
index 33e11386a3..c6fbd4cb02 100644
--- a/src/modules/html/html.cpp
+++ b/src/modules/html/html.cpp
@@ -163,8 +163,11 @@ class renderer_application
         if (enable_gpu_) {
             command_line->AppendSwitch("enable-webgl");
 
-            // This gives better performance on the gpu->cpu readback
-            command_line->AppendSwitchWithValue("use-angle", "gl");
+            // This gives better performance on the gpu->cpu readback, but can perform worse with intense templates
+            auto backend = env::properties().get(L"configuration.html.angle-backend", L"gl");
+            if (backend.size()  > 0) {
+                command_line->AppendSwitchWithValue("use-angle", backend);
+            }
         }
 
         command_line->AppendSwitch("disable-web-security");