Added options to set Framebuffer Scale Factor in WebXRSettings

Author: De-Panther

MainProject/Assets/XR/Settings/Web XR Settings.asset

@@ -16,3 +16,6 @@ MonoBehaviour:
   VROptionalFeatures: 2
   ARRequiredReferenceSpace: 2
   AROptionalFeatures: -1
+  UseFramebufferScaleFactor: 0
+  UseNativeResolution: 0
+  FramebufferScaleFactor: 1

Packages/webxr/CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 - Option to update active camera tag in WebXRCamera.
+- Options to set Framebuffer Scale Factor in WebXRSettings.
 
 ## [0.17.0] - 2023-07-10
 ### Changed

Packages/webxr/Runtime/Plugins/WebGL/webxr.jspre

@@ -848,14 +848,26 @@ setTimeout(function () {
       }
 
       XRManager.prototype.onSessionStarted = function (session) {
-        var glLayer = new XRWebGLLayer(session, this.ctx);
+        var webXRSettings = this.gameModule.WebXR.Settings;
+        var glLayer;
+        if (webXRSettings.UseFramebufferScaleFactor) {
+          var scaleFactor = webXRSettings.FramebufferScaleFactor;
+          if (webXRSettings.UseNativeResolution && XRWebGLLayer.getNativeFramebufferScaleFactor) {
+            scaleFactor = XRWebGLLayer.getNativeFramebufferScaleFactor(session);
+          }
+          glLayer = new XRWebGLLayer(session, this.ctx, {
+            framebufferScaleFactor: scaleFactor
+          });
+        } else {
+          glLayer = new XRWebGLLayer(session, this.ctx);
+        }
         session.updateRenderState({ baseLayer: glLayer });
 
         var refSpaceType = 'viewer';
         if (session.isImmersive) {
-          refSpaceType = this.gameModule.WebXR.Settings.VRRequiredReferenceSpace[0];
+          refSpaceType = webXRSettings.VRRequiredReferenceSpace[0];
           if (session.isAR) {
-            refSpaceType = this.gameModule.WebXR.Settings.ARRequiredReferenceSpace[0];
+            refSpaceType = webXRSettings.ARRequiredReferenceSpace[0];
             this.ctx.dontClearAlphaOnly = true;
           }
 

Packages/webxr/Runtime/XRPlugin/WebXRSettings.cs

@@ -32,6 +32,18 @@ public enum ExtraFeatureTypes
     public ReferenceSpaceTypes ARRequiredReferenceSpace = ReferenceSpaceTypes.local_floor;
     public ExtraFeatureTypes AROptionalFeatures = (ExtraFeatureTypes)(-1);
 
+    [Header("More Settings")]
+    [Tooltip(@"Should manually set FramebufferScaleFactor?
+The scale factor in which the scene is rendered in.
+Default is the recommended resolution. Can be different than native resolution.")]
+    public bool UseFramebufferScaleFactor = false;
+    [Tooltip(@"If ""Use Framebuffer Scale Factor"" is true, should use native resolution?")]
+    public bool UseNativeResolution = false;
+    [Tooltip(@"If ""Use Framebuffer Scale Factor"" is true, and not using native resolution, what should be the scale factor?
+Default is 1.0, the recommended resolution.")]
+    [Range(0.2f,2.0f)]
+    public float FramebufferScaleFactor = 1.0f;
+
     string EnumToString<T>(T value) where T : Enum
     {
       return value.ToString().Replace('_','-');
@@ -65,7 +77,10 @@ public string ToJson()
         ""VRRequiredReferenceSpace"": [""{EnumToString(VRRequiredReferenceSpace)}""],
         ""VROptionalFeatures"": {FlagsToString(VROptionalFeatures)},
         ""ARRequiredReferenceSpace"": [""{EnumToString(ARRequiredReferenceSpace)}""],
-        ""AROptionalFeatures"": {FlagsToString(AROptionalFeatures)}
+        ""AROptionalFeatures"": {FlagsToString(AROptionalFeatures)},
+        ""UseFramebufferScaleFactor"": {(UseFramebufferScaleFactor ? "true" : "false")},
+        ""UseNativeResolution"": {(UseNativeResolution ? "true" : "false")},
+        ""FramebufferScaleFactor"": {FramebufferScaleFactor}
 }}";
       return result;
     }