add option for grid opacity

dash-frontend/assets/lang/en.json

@@ -107,6 +107,8 @@
 		"USE_PASSTHROUGH_HELP": "Allow passthrough if the XR runtime supports it",
 		"USE_SKYBOX": "Enable skybox",
 		"USE_SKYBOX_HELP": "Show a skybox if there's no scene app or passthrough",
+		"GRID_OPACITY": "Skybox grid opacity",
+		"GRID_OPACITY_HELP": "Opacity of the floor grid when the skybox is enabled",
 		"XR_CLICK_SENSITIVITY": "XR click sensitivity",
 		"XR_CLICK_SENSITIVITY_HELP": "Analog trigger sensitivity",
 		"XR_CLICK_SENSITIVITY_RELEASE": "XR release sensitivity",

dash-frontend/src/tab/settings.rs

@@ -247,6 +247,7 @@ enum SettingType {
 	UprightScreenFix,
 	UsePassthrough,
 	UseSkybox,
+	GridOpacity,
 	XrClickSensitivity,
 	XrClickSensitivityRelease,
 	XwaylandByDefault,
@@ -294,6 +295,7 @@ impl SettingType {
 			Self::XrClickSensitivityRelease => &mut config.xr_click_sensitivity_release,
 			Self::SpaceDragMultiplier => &mut config.space_drag_multiplier,
 			Self::PointerLerpFactor => &mut config.pointer_lerp_factor,
+			Self::GridOpacity => &mut config.grid_opacity,
 			_ => panic!("Requested f32 for non-f32 SettingType"),
 		}
 	}
@@ -368,6 +370,7 @@ impl SettingType {
 			Self::Clock12h => Ok("APP_SETTINGS.CLOCK_12H"),
 			Self::DoubleCursorFix => Ok("APP_SETTINGS.DOUBLE_CURSOR_FIX"),
 			Self::FocusFollowsMouseMode => Ok("APP_SETTINGS.FOCUS_FOLLOWS_MOUSE_MODE"),
+			Self::GridOpacity => Ok("APP_SETTINGS.GRID_OPACITY"),
 			Self::HandsfreePointer => Ok("APP_SETTINGS.HANDSFREE_POINTER"),
 			Self::HideGrabHelp => Ok("APP_SETTINGS.HIDE_GRAB_HELP"),
 			Self::HideUsername => Ok("APP_SETTINGS.HIDE_USERNAME"),
@@ -408,6 +411,7 @@ impl SettingType {
 			Self::BlockPosesOnKbdInteraction => Some("APP_SETTINGS.BLOCK_POSES_ON_KBD_INTERACTION_HELP"),
 			Self::CaptureMethod => Some("APP_SETTINGS.CAPTURE_METHOD_HELP"),
 			Self::DoubleCursorFix => Some("APP_SETTINGS.DOUBLE_CURSOR_FIX_HELP"),
+			Self::GridOpacity => Some("APP_SETTINGS.GRID_OPACITY_HELP"),
 			Self::HandsfreePointer => Some("APP_SETTINGS.HANDSFREE_POINTER_HELP"),
 			Self::KeyboardMiddleClick => Some("APP_SETTINGS.KEYBOARD_MIDDLE_CLICK_HELP"),
 			Self::LeftHandedMouse => Some("APP_SETTINGS.LEFT_HANDED_MOUSE_HELP"),
@@ -795,6 +799,7 @@ impl<T> TabSettings<T> {
 				slider_f32!(mp, c, SettingType::UiRoundMultiplier, 0.5, 5.0, 0.1);
 				checkbox!(mp, c, SettingType::SetsOnWatch);
 				checkbox!(mp, c, SettingType::UseSkybox);
+				slider_f32!(mp, c, SettingType::GridOpacity, 0.0, 1.0, 0.05); // min, max, step
 				checkbox!(mp, c, SettingType::UsePassthrough);
 				checkbox!(mp, c, SettingType::Clock12h);
 			}

wayvr/src/backend/openxr/skybox.rs

@@ -161,13 +161,17 @@ impl Skybox {
             .into_iter()
             .next()
             .unwrap();
+        let set0 = pipeline.uniform_buffer_upload(
+            0,
+            vec![app.session.config.grid_opacity * app.session.config.grid_opacity],
+        )?;
         let pass = pipeline.create_pass(
             tgt.extent_f32(),
             [0.0, 0.0],
             app.gfx_extras.quad_verts.clone(),
             0..4,
             0..1,
-            vec![],
+            vec![set0],
             &Default::default(),
         )?;
 

wayvr/src/config.rs

@@ -130,6 +130,7 @@ pub struct AutoSettings {
     pub block_poses_on_kbd_interaction: bool,
     pub space_drag_multiplier: f32,
     pub use_skybox: bool,
+    pub grid_opacity: f32,
     pub use_passthrough: bool,
     pub screen_render_down: bool,
     pub pointer_lerp_factor: f32,
@@ -180,6 +181,7 @@ pub fn save_settings(config: &GeneralConfig) -> anyhow::Result<()> {
         block_poses_on_kbd_interaction: config.block_poses_on_kbd_interaction,
         space_drag_multiplier: config.space_drag_multiplier,
         use_skybox: config.use_skybox,
+        grid_opacity: config.grid_opacity,
         use_passthrough: config.use_passthrough,
         screen_render_down: config.screen_render_down,
         pointer_lerp_factor: config.pointer_lerp_factor,

wayvr/src/res/config.yaml

@@ -125,6 +125,9 @@
 ## If disabled, there will be no background rendered (solid black).
 #use_skybox: true
 
+## Monado/WiVRn only. Opacity of the floor grid if use_skybox is enabled.
+#grid_opacity: true
+
 ## Hide the help popup that appears on your hand while grabbing an overlay
 #hide_grab_help: false
 

wayvr/src/shaders/grid.frag

@@ -4,6 +4,10 @@ precision highp float;
 layout (location = 0) in vec2 in_uv;
 layout (location = 0) out vec4 out_color;
 
+layout (set = 0, binding = 0) uniform OpacityBlock {
+    uniform float opacity;
+};
+
 void main()
 {
     float fade = max(1.0 - 2.0 * length(in_uv.xy + vec2(-0.5, -0.5)), 0.0);
@@ -14,6 +18,6 @@ void main()
     } else {
         grid = 0.0;
     }
-    out_color = vec4(1.0, 1.0, 1.0, grid * fade);
+    out_color = vec4(1.0, 1.0, 1.0, grid * fade * opacity);
 }
 

wlx-common/src/config.rs

@@ -324,4 +324,7 @@ pub struct GeneralConfig {
 
 	#[serde(default)]
 	pub handsfree_pointer: HandsfreePointer,
+
+	#[serde(default = "def_one")]
+	pub grid_opacity: f32,
 }