From 143cb72f8afbbfc693505956f109aaa8361dcf6d Mon Sep 17 00:00:00 2001
From: mrmaxm <core@moka.co>
Date: Wed, 21 Feb 2024 18:53:45 +0200
Subject: [PATCH 1/2] webxr fixed foveation

---
 src/framework/xr/xr-manager.js | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/framework/xr/xr-manager.js b/src/framework/xr/xr-manager.js
index e4ff3e8ec24..136e7a66b71 100644
--- a/src/framework/xr/xr-manager.js
+++ b/src/framework/xr/xr-manager.js
@@ -959,6 +959,30 @@ class XrManager extends EventHandler {
         return this._framebufferScaleFactor;
     }
 
+    /**
+     * Set fixed foveation to the value between 0 and 1. Where 0 - no foveation, and 1 - highest
+     * foveation. It only can be set during an active XR session.
+     * Fixed foveation will reduce the resolution of the back buffer at the edges of the sceen,
+     * which can improve rendering performance.
+     *
+     * @type {number}
+     */
+    set fixedFoveation(value) {
+        if ((this._baseLayer?.fixedFoveation ?? null) !== null) {
+            this._baseLayer.fixedFoveation = value;
+        }
+    }
+
+    /**
+     * Current fixed foveation level, which is between 0 and 1. 0 - no forveation, and 1 - highest
+     * foveation. If fixed foveation is not supported, this value returns null.
+     *
+     * @type {number|null}
+     */
+    get fixedFoveation() {
+        return this._baseLayer?.fixedFoveation ?? null;
+    }
+
     /**
      * Active camera for which XR session is running or null.
      *

From dbe02f7b58917f359a2bc4410ebbc8a6221cbded Mon Sep 17 00:00:00 2001
From: mrmaxm <core@moka.co>
Date: Thu, 22 Feb 2024 14:56:15 +0200
Subject: [PATCH 2/2] fixed foveation + anti-aliasing warning

---
 src/framework/xr/xr-manager.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/framework/xr/xr-manager.js b/src/framework/xr/xr-manager.js
index 07d858f8d12..f992730b932 100644
--- a/src/framework/xr/xr-manager.js
+++ b/src/framework/xr/xr-manager.js
@@ -1028,6 +1028,10 @@ class XrManager extends EventHandler {
      */
     set fixedFoveation(value) {
         if ((this._baseLayer?.fixedFoveation ?? null) !== null) {
+            if (this.app.graphicsDevice.samples > 1) {
+                Debug.warn('Fixed Foveation is ignored. Disable anti-aliasing for it to be effective.');
+            }
+
             this._baseLayer.fixedFoveation = value;
         }
     }