Working package and setup scripts

Copied from 37b58e77cb/build-aux/ca.desrt.dconf-editor.json

.gitignore

@@ -1,2 +1,6 @@
-/vulkan/build/
+build/
-/build/
+__pycache__
+*.zip
+gschemas.compiled
+.flatpak-builder/
+out/

bin/breezy_gnome_setup

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+# This setup script should do the minimum work required to download the release package, unzip it, and kick off the
+# setup script contained within.
+
+# exit when any command fails
+set -e
+
+# Make sure only root can run our script
+if [ "$(id -u)" != "0" ]; then
+   echo "This script must be run as root" 1>&2
+   exit 1
+fi
+
+start_dir=$(pwd)
+
+# create temp directory
+tmp_dir=$(mktemp -d -t breezy-gnome-XXXXXXXXXX)
+pushd $tmp_dir > /dev/null
+echo "Created temp directory: ${tmp_dir}"
+
+# if the first argument is "-v" then the second argument is metrics version, and the third argument is binary path
+# otherwise, if the first argument is present, it's the binary path
+if [ "$1" = "-v" ]
+then
+  metrics_version="$2"
+  binary_path_arg="$3"
+else
+  binary_path_arg="$1"
+fi
+
+if [ -z "$binary_path_arg" ]
+then
+  # download and unzip the latest driver
+  echo "Downloading latest release to: ${tmp_dir}/breezyGNOME.tar.gz"
+  curl -L -O https://github.com/wheaney/breezy-desktop/releases/latest/download/breezyGNOME.tar.gz
+else
+  if [[ "$binary_path_arg" = /* ]]; then
+    abs_path="$binary_path_arg"
+  else
+    # Convert relative path to absolute path
+    abs_path=$(realpath "$start_dir/$binary_path_arg")
+  fi
+  cp $abs_path $tmp_dir
+fi
+
+echo "Extracting to: ${tmp_dir}/breezy_gnome"
+tar -xf breezyGNOME.tar.gz
+
+pushd breezy_gnome > /dev/null
+
+# run the setup script that comes with this release
+bin/setup $metrics_version
+
+echo "Deleting temp directory: ${tmp_dir}"
+rm -rf $tmp_dir
+cd "$(dirs -l -0)" && dirs -c

bin/package_gnome

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+# needs:flatpak-builder, elfutils
+# flatpak-builder --force-clean /tmp/flatpak-builddir ui/com.xronlinux.BreezyDesktop.json
+# flatpak build-export /tmp/flatpak-export /tmp/flatpak-builddir
+# flatpak build-bundle /tmp/flatpak-export com.xronlinux.BreezyDesktop.flatpak com.xronlinux.BreezyDesktop --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo
+
+# exit when any command fails
+set -e
+
+
+# https://stackoverflow.com/a/246128
+SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
+ROOT_DIR=$(realpath $SCRIPT_DIR/..)
+VULKAN_DIR=$ROOT_DIR/vulkan
+GNOME_DIR=$ROOT_DIR/gnome
+GNOME_BUILD_DIR=$GNOME_DIR/build
+
+rm -rf $GNOME_BUILD_DIR
+mkdir -p $GNOME_BUILD_DIR
+
+PACKAGE_DIR=$GNOME_BUILD_DIR/breezy_gnome
+rm -rf $PACKAGE_DIR
+mkdir -p $PACKAGE_DIR
+
+XREAL_DRIVER_DIR=$ROOT_DIR/modules/xrealAirLinuxDriver
+source $XREAL_DRIVER_DIR/bin/inject_ua
+
+# check out submodules, recursively for nested ones
+git submodule update --init --recursive
+
+# if a custom_banner image exists, copy it over the sombrero one
+if [ -e "$VULKAN_DIR/custom_banner.png" ]; then
+  cp $VULKAN_DIR/custom_banner.png $PACKAGE_DIR
+fi
+
+# copy vulkan setup scripts and configs
+mkdir -p $PACKAGE_DIR/bin
+copy_and_inject_ua "$XREAL_DRIVER_DIR/bin/ua.sh" "$PACKAGE_DIR/bin" "$GNOME_DIR/bin/setup" "$GNOME_DIR/bin/breezy_gnome_verify" "$GNOME_DIR/bin/breezy_gnome_uninstall"
+
+XREAL_BINARY=$XREAL_DRIVER_DIR/build/xrealAirLinuxDriver.tar.gz
+pushd $XREAL_DRIVER_DIR
+
+if [ ! -e "$XREAL_BINARY" ] || [ "$1" != "--skip-module-builds" ]; then
+  # if a file exists at custom_banner_config.yml, copy it to the xrealAirLinuxDriver directory
+  if [ -e "$VULKAN_DIR/custom_banner_config.yml" ]; then
+    cp $VULKAN_DIR/custom_banner_config.yml $XREAL_DRIVER_DIR
+  fi
+
+  bin/package
+fi
+
+XREAL_MANIFEST_LINE=$(sha256sum build/driver_air_glasses/manifest)
+popd
+
+cp $XREAL_BINARY $PACKAGE_DIR
+cp $XREAL_DRIVER_DIR/bin/xreal_driver_setup $PACKAGE_DIR/bin
+
+gnome/bin/package_extension
+cp gnome/out/* $PACKAGE_DIR
+
+# create a checksum that combines the checksums of all files in the directory
+pushd gnome/src
+GNOME_MANIFEST_LINE=$(find -L . -type f -exec sha256sum {} \; | sort | sha256sum | sed 's/ .*//')
+popd
+
+ui/bin/package
+cp ui/out/* $PACKAGE_DIR
+
+# create manifest file for verifying installed file checksums against the originally packaged versions
+# include any file that doesn't get modified during setup (e.g. vkBasalt.json files)
+pushd $PACKAGE_DIR
+echo $XREAL_MANIFEST_LINE > manifest
+echo -e "$GNOME_MANIFEST_LINE breezydesktop@xronlinux.com" >> manifest
+popd
+
+# bundle everything up
+pushd $GNOME_BUILD_DIR
+tar -zcvf breezyGNOME.tar.gz breezy_gnome
+popd

gnome/bin/package_extension

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+
+UUID="breezydesktop@xronlinux.com"
+
+# fail on error
+set -e
+# log executed commands
+set -x
+
+if [[ $EUID -eq 0 ]]; then
+    echo "This script must NOT be run as root" 1>&2
+    exit 1
+fi
+
+# https://stackoverflow.com/a/246128
+SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
+
+SRC_DIR="$SCRIPT_DIR/../src"
+TMP_DIR=$(mktemp -d -t breezy-gnome-XXXXXXXXXX)
+DEST_DIR="$TMP_DIR/$UUID"
+OUT_DIR="$SCRIPT_DIR/../out"
+rm -rf "$OUT_DIR"
+
+cd "$SCRIPT_DIR" || exit 1
+
+check_command() {
+    if ! command -v "$1" &>/dev/null; then
+        echo "Please install \"$1\" and make sure it's available in your \$PATH"
+        exit 1
+    fi
+}
+
+compile_schemas() {
+    check_command "glib-compile-schemas"
+    mkdir -p "$DEST_DIR/schemas/"
+
+    # the pack command also compiles the schemas but only into the zip file
+    glib-compile-schemas --targetdir="$DEST_DIR/schemas" "$SRC_DIR/schemas/"
+}
+
+copy_static_files() {
+    # Copy non generated files to destdir
+    cp $SRC_DIR/*.js $DEST_DIR/
+    cp $SRC_DIR/*.frag $DEST_DIR/
+    mkdir -p "$DEST_DIR/schemas/"
+    cp $SRC_DIR/schemas/*.xml $DEST_DIR/schemas/
+    mkdir -p $DEST_DIR/dbus-interfaces/
+    cp $SRC_DIR/dbus-interfaces/*.xml $DEST_DIR/dbus-interfaces/
+    cp $SRC_DIR/metadata.json $DEST_DIR/
+}
+
+pack() {
+    check_command "gnome-extensions"
+
+    # pack everything into a sharable zip file
+    extra_source=()
+    for file in "$DEST_DIR"/*; do
+        extra_source+=("--extra-source=$file")
+    done
+
+    mkdir -p "$OUT_DIR"
+    gnome-extensions pack --force "${extra_source[@]}" "$DEST_DIR" -o "$OUT_DIR"
+}
+
+if [ $# -eq 0 ]; then
+    # No arguments, do everything
+    compile_schemas
+    copy_static_files
+    pack
+elif [ "$1" == "build_local" ]; then
+    compile_schemas
+    copy_static_files
+elif [ "$1" == "pack" ]; then
+    pack
+elif [ "$1" == "copy_static" ]; then
+    copy_static_files
+fi

gnome/bin/setup

@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+
+set -e
+
+# This script gets packaged with the release and should do the bulk of the setup work. This allows this setup to be tied
+# to a specific release of the code, and guarantees it will never run along-side newer or older binaries.
+
+USER=${SUDO_USER:-$USER}
+USER_HOME=$(getent passwd $USER | cut -d: -f6)
+
+if [ -z "$XDG_BIN_HOME" ]; then
+  XDG_BIN_HOME="$USER_HOME/.local/bin"
+fi
+
+if [ -z "$XDG_DATA_HOME" ]; then
+  XDG_DATA_HOME="$USER_HOME/.local/share"
+fi
+DATA_DIR="$XDG_DATA_HOME/breezy_gnome"
+
+UA_EVENT_NAME="breezy_gnome_install"
+if [ -e "$XDG_BIN_HOME/breezy_gnome_uninstall" ]; then
+  echo "Cleaning up the previous installation"
+
+  # ` || true` will ensure that this can't cause a failure, even with `set -e`
+  $XDG_BIN_HOME/breezy_gnome_uninstall --for-install || true
+
+  UA_EVENT_NAME="breezy_gnome_update"
+fi
+
+UA_CLIENT_ID="BreezyGNOME"
+UA_EVENT_VERSION="$1"
+#INJECT_UA_CALL
+
+echo "Copying the breezy_gnome scripts to ${XDG_BIN_HOME}"
+mkdir -p $XDG_BIN_HOME
+cp bin/breezy_gnome_uninstall $XDG_BIN_HOME
+cp bin/breezy_gnome_verify $XDG_BIN_HOME
+chown -R $USER:$USER $XDG_BIN_HOME
+chmod -R 755 $XDG_BIN_HOME
+
+echo "Copying the manifest file to ${DATA_DIR}"
+mkdir -p $DATA_DIR
+cp manifest $DATA_DIR
+chown -R $USER:$USER $DATA_DIR
+chmod -R 755 $DATA_DIR
+
+echo "Installing the breezydesktop@xronlinux.com GNOME extension"
+gnome-extensions install --force --quiet breezydesktop@xronlinux.com.shell-extension.zip > /dev/null 2>&1
+
+echo "Installing the Breezy Desktop UI Flatpak"
+flatpak install --noninteractive --reinstall com.xronlinux.BreezyDesktop.flatpak > /dev/null 2>&1
+
+# set up the XREAL driver using the local binary
+echo "Installing xrealAirLinuxDriver"
+echo "BEGIN - xreal_driver_setup"
+if [ -z "$1" ]
+then
+  bin/xreal_driver_setup $(pwd)/xrealAirLinuxDriver.tar.gz
+else
+  bin/xreal_driver_setup -v $1 $(pwd)/xrealAirLinuxDriver.tar.gz
+fi
+
+echo "END - xreal_driver_setup"
+
+echo "Enabling the driver and setting it to Breezy Desktop mode"
+$USER_HOME/bin/xreal_driver_config -e
+$USER_HOME/bin/xreal_driver_config -vd
+
+sed -i 's/virtual_display/breezy_desktop/g' $USER_HOME/.xreal_driver_config

gnome/src/IMUAdjust.frag

@@ -0,0 +1,176 @@
+#version 330 core
+
+uniform bool enabled;
+uniform bool show_banner;
+uniform sampler2D uDesktopTexture;
+uniform mat4 imu_quat_data;
+uniform vec4 look_ahead_cfg;
+uniform float look_ahead_ms;
+uniform float display_zoom;
+uniform float display_north_offset;
+uniform float lens_distance_ratio;
+uniform bool sbs_enabled;
+uniform bool sbs_content;
+uniform bool custom_banner_enabled;
+uniform float stage_aspect_ratio;
+uniform float display_aspect_ratio;
+uniform float trim_width_percent;
+uniform float trim_height_percent;
+uniform float half_fov_z_rads;
+uniform float half_fov_y_rads;
+uniform float screen_distance;
+
+float look_ahead_ms_cap = 45.0;
+
+vec4 quatMul(vec4 q1, vec4 q2) {
+    vec3 u = vec3(q1.x, q1.y, q1.z);
+    float s = q1.w;
+    vec3 v = vec3(q2.x, q2.y, q2.z);
+    float t = q2.w;
+    return vec4(s * v + t * u + cross(u, v), s * t - dot(u, v));
+}
+
+vec4 quatConj(vec4 q) {
+    return vec4(-q.x, -q.y, -q.z, q.w);
+}
+
+vec3 applyQuaternionToVector(vec4 q, vec3 v) {
+    vec4 p = quatMul(quatMul(q, vec4(v, 0)), quatConj(q));
+    return p.xyz;
+}
+
+const int day_in_seconds = 24 * 60 * 60;
+
+vec3 applyLookAhead(
+    in vec3 position,
+    in vec3 velocity,
+    in vec3 accel,
+    in float t,
+    in float t_squared
+) {
+    return position + velocity * t + 0.5 * accel * t_squared;
+}
+
+vec3 rateOfChange(
+    in vec3 v1,
+    in vec3 v2,
+    in float delta_time
+) {
+    return (v1 - v2) / delta_time;
+}
+
+void PS_IMU_Transform(vec4 pos, vec2 texcoord, out vec4 color) {
+    float texcoord_x_min = 0.0;
+    float texcoord_x_max = 1.0;
+    float lens_y_offset = 0.0;
+    float lens_z_offset = 0.0;
+    float aspect_ratio = stage_aspect_ratio;
+
+    // if(enabled && sbs_enabled) {
+    //     bool right_display = texcoord.x > 0.5;
+    //     aspect_ratio /= 2;
+
+    //     lens_y_offset = lens_distance_ratio / 3;
+    //     if(right_display)
+    //         lens_y_offset = -lens_y_offset;
+    //     if(sbs_content) {
+    //         // source video is SBS, left-half of the screen goes to the left lens, right-half to the right lens
+    //         if(right_display)
+    //             texcoord_x_min = 0.5;
+    //         else
+    //             texcoord_x_max = 0.5;
+    //     }
+    //     if(!sbs_mode_stretched) {
+    //         // if the content isn't stretched, assume it's centered in the middle 50% of the screen
+    //         texcoord_x_min = max(0.25, texcoord_x_min);
+    //         texcoord_x_max = min(0.75, texcoord_x_max);
+    //     }
+
+    //     // translate the texcoord respresenting the current lens's half of the screen to a full-screen texcoord
+    //     texcoord.x = (texcoord.x - (right_display ? 0.5 : 0.0)) * 2;
+    // }
+
+    if(!enabled || show_banner) {
+		// vec2 banner_size = vec2(800.0 / ReShade::ScreenSize.x, 200.0 / ReShade::ScreenSize.y); // Assuming ScreenWidth and ScreenHeight are defined
+
+        // if (show_banner &&
+        //     texcoord.x >= banner_position.x - banner_size.x / 2 &&
+        //     texcoord.x <= banner_position.x + banner_size.x / 2 &&
+        //     texcoord.y >= banner_position.y - banner_size.y / 2 &&
+        //     texcoord.y <= banner_position.y + banner_size.y / 2)
+        // {
+        //     vec2 banner_texcoord = (texcoord - (banner_position - banner_size / 2)) / banner_size;
+        //     if (custom_banner_enabled) {
+        //         color = tex2D(customBannerSampler, banner_texcoord);
+        //     } else {
+        //         color = tex2D(calibratingSampler, banner_texcoord);
+        //     }
+        // } else {
+            // adjust texcoord back to the range that describes where the content is displayed
+        float texcoord_width = texcoord_x_max - texcoord_x_min;
+        texcoord.x = texcoord.x * texcoord_width + texcoord_x_min;
+
+        color = texture2D(uDesktopTexture, texcoord);
+        // }
+    } else {
+        float fov_y_half_width = tan(half_fov_y_rads);
+        float fov_y_width = fov_y_half_width * 2;
+        float fov_z_half_width = tan(half_fov_z_rads);
+        float fov_z_width = fov_z_half_width * 2;
+        
+        float vec_y = -texcoord.x * fov_y_width + fov_y_half_width;
+        float vec_z = -texcoord.y * fov_z_width + fov_z_half_width;
+        vec3 lens_vector = vec3(lens_distance_ratio, lens_y_offset, lens_z_offset);
+        vec3 texcoord_vector = vec3(1.0, vec_y, vec_z);
+
+        // then rotate the vector using each of the snapshots provided
+        vec3 rotated_vector_t0 = applyQuaternionToVector(imu_quat_data[0], texcoord_vector);
+        vec3 rotated_vector_t1 = applyQuaternionToVector(imu_quat_data[1], texcoord_vector);
+        vec3 rotated_vector_t2 = applyQuaternionToVector(imu_quat_data[2], texcoord_vector);
+        vec3 rotated_lens_vector = applyQuaternionToVector(imu_quat_data[0], lens_vector);
+
+        // compute the two velocities (units/ms) as change in the 3 rotation snapshots
+        float delta_time_t0 = imu_quat_data[3].x - imu_quat_data[3].y;
+        vec3 velocity_t0 = rateOfChange(rotated_vector_t0, rotated_vector_t1, delta_time_t0);
+        vec3 velocity_t1 = rateOfChange(rotated_vector_t1, rotated_vector_t2, imu_quat_data[3].y - imu_quat_data[3].z);
+
+        // and then the acceleration (units/ms^2) as the change in velocities
+        vec3 accel_t0 = rateOfChange(velocity_t0, velocity_t1, delta_time_t0);
+
+        // allows for the bottom and top of the screen to have different look-ahead values
+        float look_ahead_scanline_adjust = texcoord.y * look_ahead_cfg.z;
+
+        // use the 4th value of the look-ahead config to cap the look-ahead value
+        float look_ahead_ms_capped = min(min(look_ahead_ms, look_ahead_cfg.w), look_ahead_ms_cap) + look_ahead_scanline_adjust;
+        float look_ahead_ms_squared = pow(look_ahead_ms_capped, 2);
+
+        // apply most recent velocity and acceleration to most recent position to get a predicted position
+        vec3 res = applyLookAhead(rotated_vector_t0, velocity_t0, accel_t0, look_ahead_ms, look_ahead_ms_squared) -
+            rotated_lens_vector;
+
+        bool looking_behind = res.x < 0.0;
+
+        // divide all values by x to scale the magnitude so x is exactly 1, and multiply by the final display distance
+        // so the vector is pointing at a coordinate on the screen
+        float display_distance = display_north_offset - rotated_lens_vector.x;
+        res *= display_distance / res.x;
+        res += rotated_lens_vector;
+
+		// deconstruct the rotated and scaled vector back to a texcoord (just inverse operations of the first conversion
+		// above)
+        texcoord.x = (fov_y_half_width - res.y) / fov_y_width;
+        texcoord.y = (fov_z_half_width - res.z) / fov_z_width;
+
+		// apply the screen offsets now
+        float texcoord_width = texcoord_x_max - texcoord_x_min;
+        texcoord.x = texcoord.x * texcoord_width + texcoord_x_min;
+
+        if(looking_behind || texcoord.x < texcoord_x_min || texcoord.y < 0.0 || texcoord.x > texcoord_x_max || texcoord.y > 1.0 || texcoord.x <= 0.001 && texcoord.y <= 0.002) {
+            color = vec4(0, 0, 0, 1);
+        } else {
+            texcoord.x = (1.0 - trim_width_percent * 2) * texcoord.x + trim_width_percent;
+            texcoord.y = (1.0 - trim_height_percent * 2) * texcoord.y + trim_height_percent;
+            color = texture2D(uDesktopTexture, texcoord);
+        }
+    }
+}

gnome/src/cursor.js

@@ -0,0 +1,67 @@
+// Taken from https://github.com/jkitching/soft-brightness-plus
+// 
+// Copyright (C) 2023 Joel Kitching (jkitching on Github)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import Clutter from 'gi://Clutter';
+import GObject from 'gi://GObject';
+
+// Copied almost verbatim from ui/magnifier.js.
+export const MouseSpriteContent = GObject.registerClass({
+    Implements: [Clutter.Content],
+}, class MouseSpriteContent extends GObject.Object {
+    _init() {
+        super._init();
+        this._texture = null;
+    }
+
+    vfunc_get_preferred_size() {
+        if (!this._texture)
+            return [false, 0, 0];
+
+        return [true, this._texture.get_width(), this._texture.get_height()];
+    }
+
+    vfunc_paint_content(actor, node, _paintContext) {
+        if (!this._texture)
+            return;
+
+        let [minFilter, magFilter] = actor.get_content_scaling_filters();
+        let textureNode = new Clutter.TextureNode(this._texture,
+            null, minFilter, magFilter);
+        textureNode.set_name('BreezyDesktopSpriteContent');
+        node.add_child(textureNode);
+
+        textureNode.add_rectangle(actor.get_content_box());
+    }
+
+    get texture() {
+        return this._texture;
+    }
+
+    set texture(coglTexture) {
+        if (this._texture === coglTexture)
+            return;
+
+        let oldTexture = this._texture;
+        this._texture = coglTexture;
+        this.invalidate();
+
+        if (!oldTexture || !coglTexture ||
+            oldTexture.get_width() !== coglTexture.get_width() ||
+            oldTexture.get_height() !== coglTexture.get_height())
+            this.invalidate_size();
+    }
+});

gnome/src/cursormanager.js

@@ -0,0 +1,211 @@
+import Clutter from 'gi://Clutter';
+import Meta from 'gi://Meta';
+import * as PointerWatcher from 'resource:///org/gnome/shell/ui/pointerWatcher.js';
+import { MouseSpriteContent } from './cursor.js';
+
+// Taken from https://github.com/jkitching/soft-brightness-plus
+export class CursorManager {
+    constructor(mainActor) {
+        this._mainActor = mainActor;
+
+        this._changeHookFn = null;
+
+        // Set/destroyed by _enableCloningMouse/_disableCloningMouse
+        this._cursorWantedVisible = null;
+        this._cursorTracker = null;
+        this._cursorTrackerSetPointerVisible = null;
+        this._cursorTrackerSetPointerVisibleBound = null;
+        this._cursorSprite = null;
+        this._cursorActor = null;
+        this._cursorWatcher = null;
+        this._cursorSeat = null;
+        this._cursorUnfocusInhibited = false;
+
+        // Set/destroyed by _startCloningMouse / _stopCloningMouse
+        this._cursorWatch = null;
+        this._cursorChangedConnection = null;
+        this._cursorVisibilityChangedConnection = null;
+        this._cursorPositionInvalidatedConnection = null;
+    }
+
+    enable() {
+        this._enableCloningMouse();
+        this.startCloning();
+    }
+
+    disable() {
+        this._disableCloningMouse();
+    }
+
+    startCloning() {
+        this._startCloningMouse();
+    }
+
+    stopCloning() {
+        this._stopCloningMouse();
+    }
+
+    // After this:
+    // * real cursor is disabled
+    // * cloning is "on" 
+    // * cloned cursor not visible, but ready for _startCloningMouse to make it visible
+    //
+    // okay if _startCloningMouse is not immediately called since set_pointer_visible is bound to our replacement function
+    // and will trigger _startCloningMouse when the cursor should be shown
+    _enableCloningMouse() {
+        this._cursorTracker = Meta.CursorTracker.get_for_display(global.display);
+        this._cursorWantedVisible = this._cursorTracker.get_pointer_visible();
+        this._cursorTrackerSetPointerVisible = Meta.CursorTracker.prototype.set_pointer_visible;
+        this._cursorTrackerSetPointerVisibleBound = this._cursorTrackerSetPointerVisible.bind(this._cursorTracker);
+        Meta.CursorTracker.prototype.set_pointer_visible = this._cursorTrackerSetPointerVisibleReplacement.bind(this);
+
+        this._cursorTrackerSetPointerVisibleBound(false);
+
+        this._cursorSprite = new Clutter.Actor({ request_mode: Clutter.RequestMode.CONTENT_SIZE });
+        this._cursorSprite.content = new MouseSpriteContent();
+
+        this._cursorActor = new Clutter.Actor();
+        if (Clutter.Container === undefined) {
+            this._cursorActor.add_child(this._cursorSprite);
+        } else {
+            this._cursorActor.add_actor(this._cursorSprite);
+        }
+        this._cursorWatcher = PointerWatcher.getPointerWatcher();
+        this._cursorSeat = Clutter.get_default_backend().get_default_seat();
+    }
+
+    // After this:
+    // * real cursor enabled, manages its own visibility
+    // * cloning is "off"
+    // * no cloned cursor
+    // 
+    // completely reverts _enableCloningMouse
+    _disableCloningMouse() {
+        this._stopCloningMouse();
+        Meta.CursorTracker.prototype.set_pointer_visible = this._cursorTrackerSetPointerVisible;
+        this._cursorTracker.set_pointer_visible(this._cursorWantedVisible);
+
+        this._cursorWantedVisible = null;
+        this._cursorTracker = null;
+        this._cursorTrackerSetPointerVisible = null;
+        this._cursorTrackerSetPointerVisibleBound = null;
+        this._cursorSprite = null;
+        this._cursorActor = null;
+        this._cursorWatcher = null;
+        this._cursorSeat = null;
+    }
+
+    // bound to Meta.CursorTracker.prototype.set_pointer_visible when cloning is "on"
+    // original function available in this._cursorTrackerSetPointerVisibleBound
+    _cursorTrackerSetPointerVisibleReplacement(visible) {
+        this._cursorWantedVisible = visible;
+        if (visible) {
+            this._startCloningMouse();
+        } else {
+            this._stopCloningMouse();
+        }
+    }
+
+    // After this:
+    // * real cursor is hidden
+    // * cloning is "on"
+    // * clone cursor is visible
+    // 
+    // add the clone cursor actor, watch for pointer movement and cursor changes, reflect them in the cloned cursor
+    // prereqs: setup in _enableCloningMouse, _cursorWantedVisible is true
+    _startCloningMouse() {
+        if (this._cursorWatch == null) {
+            if (Clutter.Container === undefined) {
+                this._mainActor.add_child(this._cursorActor);
+            } else {
+                this._mainActor.add_actor(this._cursorActor);
+            }
+            this._cursorChangedConnection = this._cursorTracker.connect('cursor-changed', this._updateMouseSprite.bind(this));
+            this._cursorVisibilityChangedConnection = this._cursorTracker.connect('visibility-changed', this._updateMouseSprite.bind(this));
+            this._cursorPositionInvalidatedConnection = this._cursorTracker.connect('position-invalidated', this._updateMouseSprite.bind(this));
+
+            const interval = 1000 / 250;
+            this._cursorWatch = this._cursorWatcher.addWatch(interval, this._updateMousePosition.bind(this));
+
+            const [x, y] = global.get_pointer();
+            this._updateMousePosition(x, y);
+            this._updateMouseSprite();
+        }
+
+        if (this._cursorTracker.set_keep_focus_while_hidden) {
+            this._cursorTracker.set_keep_focus_while_hidden(true);
+        }
+
+        if (!this._cursorUnfocusInhibited) {
+            console.log('Breezy debug - inhibit_unfocus\n');
+            this._cursorSeat.inhibit_unfocus();
+            this._cursorUnfocusInhibited = true;
+        }
+    }
+
+    // After this:
+    // * real cursor is hidden
+    // * cloning is "on"
+    // * cloned cursor not visible, but ready for _startCloningMouse to make it visible
+    // 
+    // completely reverts _startCloningMouse
+    _stopCloningMouse() {
+        if (this._cursorWatch != null) {
+            this._cursorWatch.remove();
+            this._cursorWatch = null;
+
+            this._cursorTracker.disconnect(this._cursorChangedConnection);
+            this._cursorChangedConnection = null;
+
+            this._cursorTracker.disconnect(this._cursorVisibilityChangedConnection);
+            this._cursorVisibilityChangedConnection = null;
+
+            this._cursorTracker.disconnect(this._cursorPositionInvalidatedConnection);
+            this._cursorPositionInvalidatedConnection = null;
+
+            if (Clutter.Container === undefined) {
+                this._mainActor.remove_child(this._cursorActor);
+            } else {
+                this._mainActor.remove_actor(this._cursorActor);
+            }
+        }
+
+        if (this._cursorTracker.set_keep_focus_while_hidden) {
+            this._cursorTracker.set_keep_focus_while_hidden(false);
+        }
+
+        if (this._cursorUnfocusInhibited) {
+            console.log('Breezy debug - uninhibit_unfocus\n');
+            this._cursorSeat.uninhibit_unfocus();
+            this._cursorUnfocusInhibited = false;
+        }
+    }
+
+    _updateMousePosition(x, y) {
+        this._cursorActor.set_position(x, y);
+    }
+
+    _updateMouseSprite() {
+        const sprite = this._cursorTracker.get_sprite();
+        if (sprite) {
+            this._cursorSprite.content.texture = sprite;
+            this._cursorSprite.show();
+        } else {
+            this._cursorSprite.hide();
+        }
+
+        const [xHot, yHot] = this._cursorTracker.get_hot();
+        this._cursorSprite.set({
+            translation_x: -xHot,
+            translation_y: -yHot,
+        });
+        this._mainActor.set_child_above_sibling(this._cursorActor, null);
+        this._cursorTrackerSetPointerVisibleBound(false);
+
+        // some other processes are uninhibiting when they shouldn't, so we need to re-inhibit here
+        if (!this._cursorSeat.is_unfocus_inhibited() && this._cursorUnfocusInhibited) {
+            console.log('Breezy debug - reinhibiting\n');
+            this._cursorSeat.inhibit_unfocus();
+        }
+    }
+}

gnome/src/dbus-interfaces/org.gnome.Mutter.DisplayConfig.xml

@@ -0,0 +1,453 @@
+<!DOCTYPE node PUBLIC
+'-//freedesktop//DTD D-BUS Object Introspection 1.0//EN'
+'http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd'>
+<node>
+  <!--
+      org.gnome.Mutter.DisplayConfig:
+      @short_description: display configuration interface
+
+      This interface is used by mutter and gnome-settings-daemon
+      to apply multiple monitor configuration.
+  -->
+
+  <interface name="org.gnome.Mutter.DisplayConfig">
+
+    <!--
+        GetResources:
+	@serial: configuration serial
+	@crtcs: available CRTCs
+	@outputs: available outputs
+	@modes: available modes
+	@max_screen_width:
+	@max_screen_height:
+
+        Retrieves the current layout of the hardware.
+
+        @serial is an unique identifier representing the current state
+        of the screen. It must be passed back to ApplyConfiguration()
+	and will be increased for every configuration change (so that
+	mutter can detect that the new configuration is based on old
+	state).
+
+	A CRTC (CRT controller) is a logical monitor, ie a portion
+	of the compositor coordinate space. It might correspond
+	to multiple monitors, when in clone mode, but not that
+	it is possible to implement clone mode also by setting different
+	CRTCs to the same coordinates.
+
+	The number of CRTCs represent the maximum number of monitors
+	that can be set to expand and it is a HW constraint; if more
+	monitors are connected,	then necessarily some will clone. This
+	is complementary to the concept of the encoder (not exposed in
+	the API), which groups outputs that necessarily will show the
+	same image (again a HW constraint).
+
+	A CRTC is represented by a DBus structure with the following
+	layout:
+	* u ID: the ID in the API of this CRTC
+	* x winsys_id: the low-level ID of this CRTC (which might
+	               be a XID, a KMS handle or something entirely
+		       different)
+	* i x, y, width, height: the geometry of this CRTC
+	                         (might be invalid if the CRTC is not in
+				 use)
+	* i current_mode: the current mode of the CRTC, or -1 if this
+	                  CRTC is not used
+			  Note: the size of the mode will always correspond
+			  to the width and height of the CRTC
+	* u current_transform: the current transform (espressed according
+	                       to the wayland protocol)
+	* au transforms: all possible transforms
+	* a{sv} properties: other high-level properties that affect this
+	                    CRTC; they are not necessarily reflected in
+			    the hardware.
+			    No property is specified in this version of the API.
+
+        Note: all geometry information refers to the untransformed
+	display.
+
+	An output represents a physical screen, connected somewhere to
+	the computer. Floating connectors are not exposed in the API.
+	An output is a DBus struct with the following fields:
+	* u ID: the ID in the API
+	* x winsys_id: the low-level ID of this output (XID or KMS handle)
+	* i current_crtc: the CRTC that is currently driving this output,
+	                  or -1 if the output is disabled
+	* au possible_crtcs: all CRTCs that can control this output
+	* s name: the name of the connector to which the output is attached
+	          (like VGA1 or HDMI)
+	* au modes: valid modes for this output
+	* au clones: valid clones for this output, ie other outputs that
+	             can be assigned the same CRTC as this one; if you
+	             want to mirror two outputs that don't have each other
+	             in the clone list, you must configure two different
+	             CRTCs for the same geometry
+	* a{sv} properties: other high-level properties that affect this
+	                    output; they are not necessarily reflected in
+			    the hardware.
+			    Known properties:
+                            - "vendor" (s): (readonly) the human readable name
+                                            of the manufacturer
+                            - "product" (s): (readonly) the human readable name
+                                             of the display model
+                            - "serial" (s): (readonly) the serial number of this
+                                            particular hardware part
+			    - "display-name" (s): (readonly) a human readable name
+			                          of this output, to be shown in the UI
+	                    - "backlight" (i): (readonly, use the specific interface)
+                                               the backlight value as a percentage
+                                               (-1 if not supported)
+			    - "primary" (b): whether this output is primary
+			                     or not
+			    - "presentation" (b): whether this output is
+			                          for presentation only
+			    Note: properties might be ignored if not consistenly
+			    applied to all outputs in the same clone group. In
+			    general, it's expected that presentation or primary
+			    outputs will not be cloned.
+
+        A mode represents a set of parameters that are applied to
+	each output, such as resolution and refresh rate. It is a separate
+	object so that it can be referenced by CRTCs and outputs.
+	Multiple outputs in the same CRTCs must all have the same mode.
+	A mode is exposed as:
+	* u ID: the ID in the API
+	* x winsys_id: the low-level ID of this mode
+	* u width, height: the resolution
+	* d frequency: refresh rate
+        * u flags: mode flags as defined in xf86drmMode.h and randr.h
+
+        Output and modes are read-only objects (except for output properties),
+	they can change only in accordance to HW changes (such as hotplugging
+	a monitor), while CRTCs can be changed with ApplyConfiguration().
+
+        XXX: actually, if you insist enough, you can add new modes
+	through xrandr command line or the KMS API, overriding what the
+	kernel driver and the EDID say.
+	Usually, it only matters with old cards with broken drivers, or
+	old monitors with broken EDIDs, but it happens more often with
+	projectors (if for example the kernel driver doesn't add the
+	640x480 - 800x600 - 1024x768 default modes). Probably something
+	that we need to handle in mutter anyway.
+    -->
+    <method name="GetResources">
+      <arg name="serial" direction="out" type="u" />
+      <arg name="crtcs" direction="out" type="a(uxiiiiiuaua{sv})" />
+      <arg name="outputs" direction="out" type="a(uxiausauaua{sv})" />
+      <arg name="modes" direction="out" type="a(uxuudu)" />
+      <arg name="max_screen_width" direction="out" type="i" />
+      <arg name="max_screen_height" direction="out" type="i" />
+    </method>
+
+    <!--
+        ApplyConfiguration:
+	@serial: configuration serial
+	@persistent: whether this configuration should be saved on disk
+	@crtcs: new data for CRTCs
+	@outputs: new data for outputs
+
+	Applies the requested configuration changes.
+
+	@serial must match the serial from the last GetResources() call,
+	or org.freedesktop.DBus.AccessDenied will be generated.
+
+	If @persistent is true, mutter will attempt to replicate this
+	configuration the next time this HW layout appears.
+
+	@crtcs represents the new logical configuration, as a list
+	of structures containing:
+	- u ID: the API ID from the corresponding GetResources() call
+	- i new_mode: the API ID of the new mode to configure the CRTC
+	              with, or -1 if the CRTC should be disabled
+        - i x, y: the new coordinates of the top left corner
+	          the geometry will be completed with the size information
+		  from @new_mode
+        - u transform: the desired transform
+	- au outputs: the API ID of outputs that should be assigned to
+	              this CRTC
+        - a{sv} properties: properties whose value should be changed
+
+	Note: CRTCs not referenced in the array will be	disabled.
+
+	@outputs represent the output property changes as:
+	- u ID: the API ID of the output to change
+	- a{sv} properties: properties whose value should be changed
+
+	Note: both for CRTCs and outputs, properties not included in
+	the dictionary will not be changed.
+
+	Note: unrecognized properties will have no effect, but if the
+	configuration change succeeds the property will be reported
+	by the next GetResources() call, and if @persistent is true,
+	it will also be saved to disk.
+
+	If the configuration is invalid according to the previous
+	GetResources() call, for example because a CRTC references
+	an output it cannot drive, or not all outputs support the
+	chosen mode, the error org.freedesktop.DBus.InvalidArgs will
+	be generated.
+
+	If the configuration cannot be applied for any other reason
+	(eg. the screen size would exceed texture limits), the error
+	org.freedesktop.DBus.Error.LimitsExceeded will be generated.
+    -->
+    <method name="ApplyConfiguration">
+      <arg name="serial" direction="in" type="u" />
+      <arg name="persistent" direction="in" type="b" />
+      <arg name="crtcs" direction="in" type="a(uiiiuaua{sv})" />
+      <arg name="outputs" direction="in" type="a(ua{sv})" />
+    </method>
+
+    <!--
+        ChangeBacklight:
+	@serial: configuration serial
+	@output: the API id of the output
+	@value: the new backlight value
+
+	Changes the backlight of @output to @value, which is
+	expressed as a percentage and rounded to the HW limits.
+
+        Returns the new value after rounding.
+    -->
+    <method name="ChangeBacklight">
+      <arg name="serial" direction="in" type="u" />
+      <arg name="output" direction="in" type="u" />
+      <arg name="value" direction="in" type="i" />
+      <arg name="new_value" direction="out" type="i" />
+    </method>
+
+    <!--
+        GetCrtcGamma:
+	@serial: configuration serial
+	@crtc: API id of the crtc
+	@red: red gamma ramp
+	@green: green gamma ramp
+	@blue: blue gamma ramp
+
+	Requests the current gamma ramps of @crtc.
+    -->
+    <method name="GetCrtcGamma">
+      <arg name="serial" direction="in" type="u" />
+      <arg name="crtc" direction="in" type="u" />
+      <arg name="red" direction="out" type="aq" />
+      <arg name="green" direction="out" type="aq" />
+      <arg name="blue" direction="out" type="aq" />
+    </method>
+
+    <!--
+        SetCrtcGamma:
+	@serial: configuration serial
+	@crtc: API id of the crtc
+	@red: red gamma ramp
+	@green: green gamma ramp
+	@blue: blue gamma ramp
+
+	Changes the gamma ramps of @crtc.
+    -->
+    <method name="SetCrtcGamma">
+      <arg name="serial" direction="in" type="u" />
+      <arg name="crtc" direction="in" type="u" />
+      <arg name="red" direction="in" type="aq" />
+      <arg name="green" direction="in" type="aq" />
+      <arg name="blue" direction="in" type="aq" />
+    </method>
+
+    <!--
+        PowerSaveMode:
+
+	Contains the current power saving mode for the screen, and
+	allows changing it.
+
+        Possible values:
+	- 0: on
+	- 1: standby
+	- 2: suspend
+	- 3: off
+	- -1: unknown (unsupported)
+
+        A client should not attempt to change the powersave mode
+	from -1 (unknown) to any other value, and viceversa.
+	Note that the actual effects of the different values
+	depend on the hardware and the kernel driver in use, and
+	it's perfectly possible that all values different than on
+	have the same effect.
+	Also, setting the PowerSaveMode to 3 (off) may or may
+	not have the same effect as disabling all outputs by
+	setting no CRTC on them with ApplyConfiguration(), and
+	may or may not cause a configuration change.
+
+        Also note that this property might become out of date
+	if changed through different means (for example using the
+	XRandR interface directly).
+    -->
+    <property name="PowerSaveMode" type="i" access="readwrite" />
+
+    <!--
+        MonitorsChanged:
+
+	The signal is emitted every time the screen configuration
+	changes.
+	The client should then call GetResources() to read the new layout.
+    -->
+    <signal name="MonitorsChanged" />
+
+    <!--
+	GetCurrentState:
+	@serial: configuration serial
+	@monitors: available monitors
+	@logical_monitors: current logical monitor configuration
+	@properties: display configuration properties
+
+	@monitors represent connected physical monitors
+
+	* s connector: connector name (e.g. HDMI-1, DP-1, etc)
+	* s vendor: vendor name
+	* s product: product name
+	* s serial: product serial
+	* a(siiddada{sv}) modes: available modes
+	    * s id: mode ID
+	    * i width: width in physical pixels
+	    * i height: height in physical pixels
+	    * d refresh rate: refresh rate
+	    * d preferred scale: scale preferred as per calculations
+	    * ad supported scales: scales supported by this mode
+	    * a{sv} properties: optional properties, including:
+	       - "is-current" (b): the mode is currently active mode
+	       - "is-preferred" (b): the mode is the preferred mode
+	       - "is-interlaced" (b): the mode is an interlaced mode
+	* a{sv} properties: optional properties, including:
+	    - "width-mm" (i): physical width of monitor in millimeters
+	    - "height-mm" (i): physical height of monitor in millimeters
+	    - "is-underscanning" (b): whether underscanning is enabled
+				      (absence of this means underscanning
+				      not being supported)
+	    - "max-screen-size" (ii): the maximum size a screen may have
+				      (absence of this means unlimited screen
+				      size)
+	    - "is-builtin" (b): whether the monitor is built in, e.g. a
+				laptop panel (absence of this means it is
+				not built in)
+	    - "display-name" (s): a human readable display name of the monitor
+
+        Possible mode flags:
+	  1 : preferred mode
+	  2 : current mode
+
+
+	@logical_monitors represent current logical monitor configuration
+
+	* i x: x position
+	* i y: y position
+	* d scale: scale
+	* u transform: transform (see below)
+	* b primary: true if this is the primary logical monitor
+	* a(sss) monitors: monitors displaying this logical monitor
+	    * connector: name of the connector (e.g. DP-1, eDP-1 etc)
+	    * vendor: vendor name
+	    * product: product name
+	    * serial: product serial
+	* a{sv} properties: possibly other properties
+
+	Posisble transform values:
+	  0: normal
+	  1: 90°
+	  2: 180°
+	  3: 270°
+	  4: flipped
+	  5: 90° flipped
+	  6: 180° flipped
+	  7: 270° flipped
+
+
+	@layout_mode current layout mode represents the way logical monitors
+	are layed out on the screen. Possible modes include:
+
+	  1 : physical
+	  2 : logical
+
+	With physical layout mode, each logical monitor has the same dimensions
+	as the monitor modes of the associated monitors assigned to it, no
+	matter what scale is in use.
+
+	With logical mode, the dimension of a logical monitor is the dimension
+	of the monitor mode, divided by the logical monitor scale.
+
+
+	Possible @properties are:
+
+	* "supports-mirroring" (b): FALSE if mirroring not supported; TRUE or not
+	                            present if mirroring is supported.
+	* "layout-mode" (u): Represents in what way logical monitors are laid
+			     out on the screen. The layout mode can be either
+			     of the ones listed below. Absence of this property
+			     means the layout mode cannot be changed, and that
+			     "logical" mode is assumed to be used.
+	    * 1 : logical  - the dimension of a logical monitor is derived from
+			     the monitor modes associated with it, then scaled
+			     using the logical monitor scale.
+	    * 2 : physical - the dimension of a logical monitor is derived from
+			     the monitor modes associated with it.
+	* "supports-changing-layout-mode" (b): True if the layout mode can be
+					       changed. Absence of this means the
+					       layout mode cannot be changed.
+	* "global-scale-required" (b): True if all the logical monitors must
+				       always use the same scale. Absence of
+				       this means logical monitor scales can
+				       differ.
+	* "legacy-ui-scaling-factor" (i): The legacy scaling factor traditionally
+				          used to scale X11 clients (commonly
+					  communicated via the
+					  Gdk/WindowScalingFactor XSetting entry).
+    -->
+    <method name="GetCurrentState">
+      <arg name="serial" direction="out" type="u" />
+      <arg name="monitors" direction="out" type="a((ssss)a(siiddada{sv})a{sv})" />
+      <arg name="logical_monitors" direction="out" type="a(iiduba(ssss)a{sv})" />
+      <arg name="properties" direction="out" type="a{sv}" />
+    </method>
+
+    <!--
+	ApplyMonitorsConfig:
+	@serial: configuration serial
+	@method: configuration method
+	@logical_monitors: monitors configuration
+	@properties: properties
+
+	@method represents the way the configuration should be handled.
+
+	Possible methods:
+	  0: verify
+	  1: temporary
+	  2: persistent
+
+	@logical_monitors consists of a list of logical monitor configurations.
+	Each logical monitor configuration consists of:
+
+	* i: layout x position
+	* i: layout y position
+	* d: scale
+	* u: transform (see GetCurrentState)
+	* b primary: true if this is the primary logical monitor
+	* a(ssa{sv}): a list of monitors, each consisting of:
+	    * s: connector
+	    * s: monitor mode ID
+	    * a{sv}: monitor properties, including:
+	        - "enable_underscanning" (b): enable monitor underscanning;
+					      may only be set when underscanning
+					      is supported (see GetCurrentState).
+
+	@properties may effect the global monitor configuration state. Possible
+	properties are:
+
+	* "layout-mode" (u): layout mode the passed configuration is in; may
+			     only be set when changing the layout mode is
+			     supported (see GetCurrentState).
+    -->
+    <method name="ApplyMonitorsConfig">
+      <arg name="serial" direction="in" type="u" />
+      <arg name="method" direction="in" type="u" />
+      <arg name="logical_monitors" direction="in" type="a(iiduba(ssa{sv}))" />
+      <arg name="properties" direction="in" type="a{sv}" />
+    </method>
+  </interface>
+</node>

gnome/src/extension.js

@@ -0,0 +1,244 @@
+import Clutter from 'gi://Clutter'
+import Gio from 'gi://Gio';
+import GLib from 'gi://GLib';
+import Meta from 'gi://Meta';
+import Shell from 'gi://Shell';
+import St from 'gi://St';
+
+import { CursorManager } from './cursormanager.js';
+import Globals from './globals.js';
+import MonitorManager from './monitormanager.js';
+import { IPC_FILE_PATH, XREffect } from './xrEffect.js';
+
+import {Extension} from 'resource:///org/gnome/shell/extensions/extension.js';
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+
+const SUPPORTED_MONITOR_PRODUCTS = [
+    'VITURE',
+    'nreal air',
+    'Air',
+    'MetaMonitor' // nested mode dummy monitor
+];
+
+export default class BreezyDesktopExtension extends Extension {
+    constructor(metadata, uuid) {
+        super(metadata, uuid);
+
+        this.settings = this.getSettings();
+        
+        // Set/destroyed by enable/disable
+        this._cursor_manager = null;
+        this._monitor_manager = null;
+        this._xr_effect = null;
+        this._overlay = null;
+        this._target_monitor = null;
+        this._is_effect_running = false;
+    }
+
+    enable() {
+        Globals.extension_dir = this.path;
+        this._monitor_manager = new MonitorManager(this.path);
+        this._monitor_manager.setChangeHook(this._setup.bind(this));
+        this._monitor_manager.enable();
+
+        this._setup();
+    }
+
+    _poll_for_ready() {
+        var target_monitor = this._target_monitor;
+        var is_effect_running = this._is_effect_running;
+        this._running_poller_id = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 1000, (() => {
+            if (is_effect_running) return GLib.SOURCE_REMOVE;
+
+            const is_driver_running = this._check_driver_running();
+            if (is_driver_running && target_monitor) {
+                console.log('Driver is running, supported monitor connected. Enabling XR effect.');
+                this._effect_enable();
+                return GLib.SOURCE_REMOVE;
+            } else {
+                return GLib.SOURCE_CONTINUE;
+            }
+        }).bind(this));
+    }
+
+    _find_supported_monitor() {
+        const target_monitor = this._monitor_manager.getMonitorPropertiesList()?.find(
+            monitor => SUPPORTED_MONITOR_PRODUCTS.includes(monitor.product));
+        if (target_monitor !== undefined) {
+            return {
+                monitor: this._monitor_manager.getMonitors()[target_monitor.index],
+                refreshRate: target_monitor.refreshRate,
+            };
+        }
+
+        if (this.settings.get_boolean('developer-mode')) {
+            // allow testing XR devices with just USB, no video needed
+            return {
+                monitor: this._monitor_manager.getMonitors()[0],
+                refreshRate: 60,
+            };
+        }
+
+        return null;
+    }
+
+    _setup() {
+        if (this._is_effect_running) {
+            console.log('Monitors changed, disabling XR effect');
+            this._effect_disable();
+        }
+        const target_monitor = this._find_supported_monitor();
+
+        // if target_monitor isn't set, do nothing and wait for MonitorManager to call this again
+        if (target_monitor && this._running_poller_id === undefined) {
+            this._target_monitor = target_monitor.monitor;
+            this._refresh_rate = target_monitor.refreshRate;
+
+            if (this._check_driver_running()) {
+                console.log('Ready, enabling XR effect');
+                this._effect_enable();
+            } else {
+                this._poll_for_ready();
+            }
+        }
+    }
+
+    _check_driver_running() {
+        if (!Globals.ipc_file) Globals.ipc_file = Gio.file_new_for_path(IPC_FILE_PATH);
+        return Globals.ipc_file.query_exists(null);
+    }
+
+    _effect_enable() {
+        this._running_poller_id = undefined;
+        if (!this._is_effect_running) {
+            this._is_effect_running = true;
+
+            try {
+                this._cursor_manager = new CursorManager(Main.layoutManager.uiGroup);
+                this._cursor_manager.enable();
+
+                this._overlay = new St.Bin({ style: 'background-color: rgba(0, 0, 0, 1);'});
+                this._overlay.opacity = 255;
+                this._overlay.set_position(this._target_monitor.x, this._target_monitor.y);
+                this._overlay.set_size(this._target_monitor.width, this._target_monitor.height);
+
+                const overlayContent = new Clutter.Actor({clip_to_allocation: true});
+                const uiClone = new Clutter.Clone({ source: Main.layoutManager.uiGroup, clip_to_allocation: true });
+                uiClone.x = -this._target_monitor.x;
+                uiClone.y = -this._target_monitor.y;
+                if (Clutter.Container === undefined) {
+                    overlayContent.add_child(uiClone);
+                } else {
+                    overlayContent.add_actor(uiClone);
+                }
+
+                this._overlay.set_child(overlayContent);
+
+                global.stage.insert_child_above(this._overlay, null);
+                Shell.util_set_hidden_from_pick(this._overlay, true);
+                
+                this._xr_effect = new XREffect({
+                    target_monitor: this._target_monitor,
+                    target_framerate: this._refresh_rate ?? 60,
+                    display_distance: this.settings.get_double('display-distance'),
+                    toggle_display_distance_start: this.settings.get_double('toggle-display-distance-start'),
+                    toggle_display_distance_end: this.settings.get_double('toggle-display-distance-end'),
+                });
+
+                this.settings.bind('effect-enable', this._xr_effect, 'effect-enable', Gio.SettingsBindFlags.DEFAULT)
+                this.settings.bind('display-distance', this._xr_effect, 'display-distance', Gio.SettingsBindFlags.DEFAULT)
+                this.settings.bind('toggle-display-distance-start', this._xr_effect, 'toggle-display-distance-start', Gio.SettingsBindFlags.DEFAULT)
+                this.settings.bind('toggle-display-distance-end', this._xr_effect, 'toggle-display-distance-end', Gio.SettingsBindFlags.DEFAULT)
+
+                this._overlay.add_effect_with_name('xr-desktop', this._xr_effect);
+                Meta.disable_unredirect_for_display(global.display);
+
+                this._add_settings_keybinding('recenter-display-shortcut', this._recenter_display.bind(this));
+                this._add_settings_keybinding('toggle-display-distance-shortcut', this._xr_effect._change_distance.bind(this._xr_effect));
+                this._add_settings_keybinding('toggle-follow-shortcut', this._toggle_follow_mode.bind(this));
+            } catch (e) {
+                console.error('Error enabling XR effect', e);
+                this._effect_disable();
+            }
+        }
+    }
+
+    _add_settings_keybinding(settings_key, bind_to_function) {
+        Main.wm.addKeybinding(
+            settings_key,
+            this.settings,
+            Meta.KeyBindingFlags.IGNORE_AUTOREPEAT,
+            Shell.ActionMode.NORMAL | Shell.ActionMode.OVERVIEW | Shell.ActionMode.POPUP,
+            bind_to_function
+        );
+                
+        // Connect to the 'changed' signal for the keybinding property
+        this.settings.connect(`changed::${settings_key}`, () => {
+            // Remove the old keybinding
+            Main.wm.removeKeybinding(settings_key);
+        
+            // Add the updated keybinding
+            Main.wm.addKeybinding(
+                settings_key,
+                this.settings,
+                Meta.KeyBindingFlags.IGNORE_AUTOREPEAT,
+                Shell.ActionMode.NORMAL | Shell.ActionMode.OVERVIEW | Shell.ActionMode.POPUP,
+                bind_to_function
+            );
+        });
+    }
+
+    _write_control(key, value) {
+        const file = Gio.file_new_for_path('/dev/shm/xr_driver_control');
+        const stream = file.replace(null, false, Gio.FileCreateFlags.NONE, null);
+        stream.write(`${key}=${value}`, null);
+        stream.close(null);
+    }
+
+    _recenter_display() {
+        this._write_control('recenter_screen', 'true');
+    }
+
+    _toggle_follow_mode() {
+        this._write_control('toggle_breezy_desktop_smooth_follow', 'true');
+    }
+
+    _effect_disable() {
+        this._is_effect_running = false;
+
+        if (this._running_poller_id) GLib.source_remove(this._running_poller_id);
+
+        Main.wm.removeKeybinding('recenter-display-shortcut');
+        Main.wm.removeKeybinding('toggle-display-distance-shortcut');
+        Meta.enable_unredirect_for_display(global.display);
+
+        if (this._overlay) {
+            global.stage.remove_child(this._overlay);
+            this._overlay.remove_effect_by_name('xr-desktop');
+            this._overlay.destroy();
+            this._overlay = null;
+        }
+
+        if (this._xr_effect) {
+            this._xr_effect = null;
+        }
+
+        if (this._cursor_manager) {
+            this._cursor_manager.disable();
+            this._cursor_manager = null;
+        }
+    }
+
+    disable() {
+        this._effect_disable();
+        this._target_monitor = null;
+        if (this._monitor_manager) {
+            this._monitor_manager.disable();
+            this._monitor_manager = null;
+        }
+    }
+}
+
+function init() {
+    return new Extension();
+}

gnome/src/globals.js

@@ -0,0 +1,5 @@
+const Globals = {
+    ipc_file:       null,   // Gio.File instance, file exists
+    extension_dir:  null    // string path
+}
+export default Globals;

gnome/src/ipc.js

@@ -0,0 +1,49 @@
+export const UINT8_SIZE = 1;
+export const BOOL_SIZE = UINT8_SIZE;
+export const UINT_SIZE = 4;
+export const FLOAT_SIZE = 4;
+
+export const DATA_VIEW_INFO_OFFSET_INDEX = 0;
+export const DATA_VIEW_INFO_SIZE_INDEX = 1;
+export const DATA_VIEW_INFO_COUNT_INDEX = 2;
+
+// computes the end offset, exclusive
+export function dataViewEnd(dataViewInfo) {
+    return dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX] + dataViewInfo[DATA_VIEW_INFO_SIZE_INDEX] * dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX];
+}
+
+export function dataViewUint8(dataView, dataViewInfo) {
+    return dataView.getUint8(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX]);
+}
+
+export function dataViewUint(dataView, dataViewInfo) {
+    return dataView.getUint32(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX], true);
+}
+
+export function dataViewBigUint(dataView, dataViewInfo) {
+    return Number(dataView.getBigUint64(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX], true));
+}
+
+export function dataViewUintArray(dataView, dataViewInfo) {
+    const uintArray = []
+    let offset = dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX];
+    for (let i = 0; i < dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX]; i++) {
+        uintArray.push(dataView.getUint32(offset, true));
+        offset += UINT_SIZE;
+    }
+    return uintArray;
+}
+
+export function dataViewFloat(dataView, dataViewInfo) {
+    return dataView.getFloat32(dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX], true);
+}
+
+export function dataViewFloatArray(dataView, dataViewInfo) {
+    const floatArray = []
+    let offset = dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX];
+    for (let i = 0; i < dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX]; i++) {
+        floatArray.push(dataView.getFloat32(offset, true));
+        offset += FLOAT_SIZE;
+    }
+    return floatArray;
+}

gnome/src/math.js

@@ -0,0 +1,3 @@
+export function degreeToRadian(degree) {
+    return degree * Math.PI / 180;
+}

gnome/src/metadata.json

@@ -0,0 +1,10 @@
+{
+    "uuid": "breezydesktop@xronlinux.com",
+    "name": "Breezy GNOME XR Desktop",
+    "description": "XR virtual desktop for GNOME.",
+    "settings-schema": "com.xronlinux.BreezyDesktop",
+    "shell-version": [
+        "45", "46"
+    ],
+    "url": "https://github.com/wheaney/breezy-desktop"
+}

gnome/src/monitormanager.js

@@ -0,0 +1,167 @@
+// Taken from https://github.com/jkitching/soft-brightness-plus
+// 
+// Copyright (C) 2019, 2021 Philippe Troin (F-i-f on Github)
+// Copyright (C) 2023 Joel Kitching (jkitching on Github)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import Gio from 'gi://Gio';
+
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+
+let cachedDisplayConfigProxy = null;
+
+function getDisplayConfigProxy(extPath) {
+    if (cachedDisplayConfigProxy == null) {
+        let xml = null;
+        const file = Gio.File.new_for_path(extPath + '/dbus-interfaces/org.gnome.Mutter.DisplayConfig.xml');
+        try {
+            const [ok, bytes] = file.load_contents(null);
+            if (ok) {
+                xml = new TextDecoder().decode(bytes);
+            }
+        } catch (e) {
+            console.error('failed to load DisplayConfig interface XML');
+            throw e;
+        }
+        cachedDisplayConfigProxy = Gio.DBusProxy.makeProxyWrapper(xml);
+    }
+    return cachedDisplayConfigProxy;
+}
+
+export function newDisplayConfig(extPath, callback) {
+    const DisplayConfigProxy = getDisplayConfigProxy(extPath);
+    new DisplayConfigProxy(
+        Gio.DBus.session,
+        'org.gnome.Mutter.DisplayConfig',
+        '/org/gnome/Mutter/DisplayConfig',
+        callback
+    );
+}
+
+export function getMonitorConfig(displayConfigProxy, callback) {
+    displayConfigProxy.GetResourcesRemote((result) => {
+        if (result.length <= 2) {
+            callback(null, 'Cannot get DisplayConfig: No outputs in GetResources()');
+        } else {
+            const monitors = [];
+            for (let i = 0; i < result[2].length; i++) {
+                const output = result[2][i];
+                if (output.length <= 7) {
+                    callback(null, 'Cannot get DisplayConfig: No properties on output #' + i);
+                    return;
+                }
+                const props = output[7];
+                const displayName = props['display-name'].get_string()[0];
+                const connectorName = output[4];
+                if (!displayName || displayName == '') {
+                    const displayName = 'Monitor on output ' + connectorName;
+                }
+                const vendor = props['vendor'].get_string()[0];
+                const product = props['product'].get_string()[0];
+                const serial = props['serial'].get_string()[0];
+
+                // grab refresh rate from the modes array
+                const refreshRate = result[3][i][4];
+
+                monitors.push([displayName, connectorName, vendor, product, serial, refreshRate]);
+            }
+            callback(monitors, null);
+        }
+    });
+}
+
+// Monitor change handling
+export default class MonitorManager {
+    constructor(extPath) {
+        this._extPath = extPath;
+
+        this._monitorsChangedConnection = null;
+        this._displayConfigProxy = null;
+        this._backendManager = null;
+        this._monitorProperties = null;
+        this._changeHookFn = null;
+    }
+
+    enable() {
+        this._backendManager = global.backend.get_monitor_manager();
+        newDisplayConfig(this._extPath, (proxy, error) => {
+            if (error) {
+                return;
+            }
+            this._displayConfigProxy = proxy;
+            this._on_monitors_change();
+        });
+
+        this._monitorsChangedConnection = Main.layoutManager.connect('monitors-changed', this._on_monitors_change.bind(this));
+    }
+
+    disable() {
+        Main.layoutManager.disconnect(this._monitorsChangedConnection);
+
+        this._monitorsChangedConnection = null;
+        this._displayConfigProxy = null;
+        this._backendManager = null;
+        this._monitorProperties = null;
+        this._changeHookFn = null;
+    }
+
+    setChangeHook(fn) {
+        this._changeHookFn = fn;
+    }
+
+    setPostCallback(callback) {
+        this._postCallback = callback;
+    }
+
+    getMonitors() {
+        return Main.layoutManager.monitors;
+    }
+
+    getMonitorPropertiesList() {
+        return this._monitorProperties;
+    }
+
+    _on_monitors_change() {
+        if (this._displayConfigProxy == null) {
+            return;
+        }
+        getMonitorConfig(this._displayConfigProxy, (result, error) => {
+            if (error) {
+                return;
+            }
+            const monitorProperties = [];
+            for (let i = 0; i < result.length; i++) {
+                const [monitorName, connectorName, vendor, product, serial, refreshRate] = result[i];
+                const monitorIndex = this._backendManager.get_monitor_for_connector(connectorName);
+                console.log(`\n\nFound monitor ${monitorName}, vendor ${vendor}, product ${product}, serial ${serial}, connector ${connectorName}, index ${monitorIndex}\n\n`);
+                if (monitorIndex >= 0) {
+                    monitorProperties[monitorIndex] = {
+                        index: monitorIndex,
+                        name: monitorName,
+                        vendor: vendor,
+                        product: product,
+                        serial: serial,
+                        connector: connectorName,
+                        refreshRate: refreshRate
+                    };
+                }
+            }
+            this._monitorProperties = monitorProperties;
+            if (this._changeHookFn !== null) {
+                this._changeHookFn();
+            }
+        });
+    }
+}

gnome/src/schemas/com.xronlinux.BreezyDesktop.gschema.xml

@@ -0,0 +1 @@
+../../../ui/data/com.xronlinux.BreezyDesktop.gschema.xml

gnome/src/shader.js

@@ -0,0 +1,14 @@
+import Gio from 'gi://Gio';
+
+export function getShaderSource(path) {
+    const file = Gio.file_new_for_path(path);
+    const data = file.load_contents(null);
+
+    // version string helps with linting, but GNOME extension doesn't like it, so remove it if it's there
+    //
+    // TODO -   Gjs on GNOME 45.5 WARNING: Some code called array.toString() on a Uint8Array instance. Previously this 
+    //          would have interpreted the bytes of the array as a string, but that is nonstandard. In the future this 
+    //          will return the bytes as comma-separated digits. For the time being, the old behavior has been preserved, 
+    //          but please fix your code anyway to use TextDecoder.
+    return data[1].toString().replace(/^#version .*$/gm, '') + '\n';
+}

gnome/src/time.js

@@ -0,0 +1,7 @@
+export function getEpochSec() {
+    return toSec(Date.now());
+}
+
+export function toSec(milliseconds) {
+    return Math.floor(milliseconds / 1000);
+}

gnome/src/xrEffect.js

@@ -0,0 +1,308 @@
+import Clutter from 'gi://Clutter';
+import Cogl from 'gi://Cogl';
+import GLib from 'gi://GLib';
+import GObject from 'gi://GObject';
+import Shell from 'gi://Shell';
+
+import Globals from './globals.js';
+
+import { 
+    dataViewEnd,
+    dataViewUint8,
+    dataViewBigUint,
+    dataViewUintArray,
+    dataViewFloat,
+    dataViewFloatArray,
+    BOOL_SIZE,
+    DATA_VIEW_INFO_COUNT_INDEX,
+    DATA_VIEW_INFO_OFFSET_INDEX,
+    FLOAT_SIZE,
+    UINT_SIZE,
+    UINT8_SIZE
+} from "./ipc.js";
+import { degreeToRadian } from "./math.js";
+import { getShaderSource } from "./shader.js";
+import { toSec } from "./time.js";
+
+export const IPC_FILE_PATH = "/dev/shm/breezy_desktop_imu";
+
+// the driver should be using the same data layout version
+const DATA_LAYOUT_VERSION = 2;
+
+// DataView info: [offset, size, count]
+const VERSION = [0, UINT8_SIZE, 1];
+const ENABLED = [dataViewEnd(VERSION), BOOL_SIZE, 1];
+const LOOK_AHEAD_CFG = [dataViewEnd(ENABLED), FLOAT_SIZE, 4];
+const DISPLAY_RES = [dataViewEnd(LOOK_AHEAD_CFG), UINT_SIZE, 2];
+const DISPLAY_FOV = [dataViewEnd(DISPLAY_RES), FLOAT_SIZE, 1];
+const LENS_DISTANCE_RATIO = [dataViewEnd(DISPLAY_FOV), FLOAT_SIZE, 1];
+const SBS_ENABLED = [dataViewEnd(LENS_DISTANCE_RATIO), BOOL_SIZE, 1];
+const CUSTOM_BANNER_ENABLED = [dataViewEnd(SBS_ENABLED), BOOL_SIZE, 1];
+const EPOCH_MS = [dataViewEnd(CUSTOM_BANNER_ENABLED), UINT_SIZE, 2];
+const IMU_QUAT_DATA = [dataViewEnd(EPOCH_MS), FLOAT_SIZE, 16];
+const DATA_VIEW_LENGTH = dataViewEnd(IMU_QUAT_DATA);
+
+// cached after first retrieval
+const shaderUniformLocations = {
+    'enabled': null,
+    'show_banner': null,
+    'imu_quat_data': null,
+    'look_ahead_cfg': null,
+    'look_ahead_ms': null,
+    'stage_aspect_ratio': null,
+    'display_aspect_ratio': null,
+    'trim_width_percent': null,
+    'trim_height_percent': null,
+    'display_zoom': null,
+    'display_north_offset': null,
+    'lens_distance_ratio': null,
+    'sbs_enabled': null,
+    'sbs_content': null,
+    'custom_banner_enabled': null,
+    'half_fov_z_rads': null,
+    'half_fov_y_rads': null,
+    'screen_distance': null
+};
+
+function transferUniformBoolean(effect, location, dataView, dataViewInfo) {
+    // GLSL bool is a float under the hood, evaluates false if 0 or 0.0, true otherwise
+    effect.set_uniform_float(location, 1, [dataViewUint8(dataView, dataViewInfo)]);
+}
+
+function setUniformFloat(effect, locationName, dataViewInfo, value) {
+    effect.set_uniform_float(shaderUniformLocations[locationName], dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX], value);
+}
+
+function transferUniformFloat(effect, locationName, dataView, dataViewInfo) {
+    setUniformFloat(effect, locationName, dataViewInfo, dataViewFloatArray(dataView, dataViewInfo));
+}
+
+function setSingleFloat(effect, locationName, value) {
+    effect.set_uniform_float(shaderUniformLocations[locationName], 1, [value]);
+}
+
+function setUniformMatrix(effect, locationName, components, dataView, dataViewInfo) {
+    const numValues = dataViewInfo[DATA_VIEW_INFO_COUNT_INDEX];
+    if (numValues / components !== components) {
+        throw new Error('Invalid matrix size');
+    }
+
+    const floatArray = [].fill(0, 0, numValues);
+    let offset = dataViewInfo[DATA_VIEW_INFO_OFFSET_INDEX];
+    for (let i = 0; i < numValues; i++) {
+        // GLSL uses column-major order, so we need to transpose the matrix
+        const row = i % components;
+        const column = Math.floor(i / components);
+
+        floatArray[row * components + column] = dataView.getFloat32(offset, true);
+        offset += FLOAT_SIZE;
+    }
+    effect.set_uniform_matrix(shaderUniformLocations[locationName], true, components, floatArray);
+}
+
+function lookAheadMS(dataView) {
+    const lookAheadCfg = dataViewFloatArray(dataView, LOOK_AHEAD_CFG);
+    const imuDateMS = dataViewBigUint(dataView, EPOCH_MS);
+
+    // how stale the imu data is
+    const dataAge = Date.now() - imuDateMS;
+
+    return lookAheadCfg[0] + dataAge;
+}
+
+// most uniforms don't change frequently, this function should be called periodically
+function setIntermittentUniformVariables() {
+    const dataView = this._dataView;
+
+    if (dataView.byteLength === DATA_VIEW_LENGTH) {
+        const version = dataViewUint8(dataView, VERSION);
+        const imuDateMS = dataViewBigUint(dataView, EPOCH_MS);
+        const currentDateMS = Date.now();
+        const validKeepalive = Math.abs(toSec(currentDateMS) - toSec(imuDateMS)) < 5;
+        const imuData = dataViewFloatArray(dataView, IMU_QUAT_DATA);
+        const imuResetState = imuData[0] === 0.0 && imuData[1] === 0.0 && imuData[2] === 0.0 && imuData[3] === 1.0;
+        const enabled = this.effect_enable && dataViewUint8(dataView, ENABLED) !== 0 && version === DATA_LAYOUT_VERSION && validKeepalive && !imuResetState;
+
+        if (enabled) {
+            const displayRes = dataViewUintArray(dataView, DISPLAY_RES);
+            const displayFov = dataViewFloat(dataView, DISPLAY_FOV);
+            const lensDistanceRatio = dataViewFloat(dataView, LENS_DISTANCE_RATIO);
+
+            // compute these values once, they only change when the XR device changes
+            const displayAspectRatio = displayRes[0] / displayRes[1];
+            const stageAspectRatio = this.target_monitor.width / this.target_monitor.height;
+            const diagToVertRatio = Math.sqrt(Math.pow(stageAspectRatio, 2) + 1);
+            const halfFovZRads = degreeToRadian(displayFov / diagToVertRatio) / 2;
+            const halfFovYRads = halfFovZRads * stageAspectRatio;
+            const screenDistance = 1.0 - lensDistanceRatio;
+
+            // our overlay doesn't quite cover the full screen texture, which allows us to see some of the real desktop
+            // underneath, so we trim two pixels around the entire edge of the texture
+            const trimWidthPercent = 2.0 / this.target_monitor.width;
+            const trimHeightPercent = 2.0 / this.target_monitor.height;
+            
+            // all these values are transferred directly, unmodified from the driver
+            transferUniformFloat(this, 'look_ahead_cfg', dataView, LOOK_AHEAD_CFG);
+            transferUniformFloat(this, 'lens_distance_ratio', dataView, LENS_DISTANCE_RATIO);
+            transferUniformBoolean(this, 'sbs_enabled', dataView, SBS_ENABLED);
+            transferUniformBoolean(this, 'custom_banner_enabled', dataView, CUSTOM_BANNER_ENABLED);
+
+            // computed values with no dataViewInfo, so we set these manually
+            setSingleFloat(this, 'show_banner', imuResetState);
+            setSingleFloat(this, 'stage_aspect_ratio', stageAspectRatio);
+            setSingleFloat(this, 'display_aspect_ratio', displayAspectRatio);
+            setSingleFloat(this, 'trim_width_percent', trimWidthPercent);
+            setSingleFloat(this, 'trim_height_percent', trimHeightPercent);
+            setSingleFloat(this, 'half_fov_z_rads', halfFovZRads);
+            setSingleFloat(this, 'half_fov_y_rads', halfFovYRads);
+            setSingleFloat(this, 'screen_distance', screenDistance);
+
+            // TOOD - drive from settings
+            setSingleFloat(this, 'display_zoom', 1.0);
+            setSingleFloat(this, 'sbs_content', 0.0);
+        }
+        setSingleFloat(this, 'enabled', enabled ? 1.0 : 0.0);
+    } else if (dataView.byteLength !== 0) {
+        console.error(`Invalid dataView.byteLength: ${dataView.byteLength} !== ${DATA_VIEW_LENGTH}`)
+    }
+}
+
+export const XREffect = GObject.registerClass({
+    Properties: {
+        'effect-enable': GObject.ParamSpec.boolean(
+            'effect-enable', 
+            'Effect enable', 
+            'Whether this effect is enabled', 
+            GObject.ParamFlags.READWRITE,
+            true
+        ),
+        'target-monitor': GObject.ParamSpec.jsobject(
+            'target-monitor', 
+            'Target Monitor', 
+            'Geometry of the target monitor for this effect', 
+            GObject.ParamFlags.READWRITE
+        ),
+        'target-framerate': GObject.ParamSpec.uint(
+            'target-framerate', 
+            'Target Framerate', 
+            'Target framerate for this effect',
+            GObject.ParamFlags.READWRITE, 60, 240, 60
+        ),
+        'display-distance': GObject.ParamSpec.double(
+            'display-distance',
+            'Display Distance',
+            'How far away the display appears',
+            GObject.ParamFlags.READWRITE, 
+            0.2, 
+            2.5, 
+            1.05
+        ),
+        'toggle-display-distance-start': GObject.ParamSpec.double(
+            'toggle-display-distance-start',
+            'Display distance start',
+            'Start distance when using the "change distance" shortcut.',
+            GObject.ParamFlags.READWRITE, 
+            0.2, 
+            2.5, 
+            1.05
+        ),
+        'toggle-display-distance-end': GObject.ParamSpec.double(
+            'toggle-display-distance-end',
+            'Display distance end',
+            'End distance when using the "change distance" shortcut.',
+            GObject.ParamFlags.READWRITE, 
+            0.2, 
+            2.5, 
+            1.05
+        )
+    }
+}, class XREffect extends Shell.GLSLEffect {
+    constructor(params = {}) {
+        super(params);
+
+        this._frametime = Math.floor(1000 / this.target_framerate);
+
+        this._is_display_distance_at_end = false;
+        this._distance_ease_timeline = null;
+    }
+
+    _change_distance() {
+        if (this._distance_ease_timeline?.is_playing()) this._distance_ease_timeline.stop();
+
+        this._distance_ease_start = this.display_distance;
+        this._distance_ease_timeline = Clutter.Timeline.new_for_actor(this.get_actor(), 250);
+
+        const toggle_display_distance_target = this._is_display_distance_at_end ? 
+            this.toggle_display_distance_start : this.toggle_display_distance_end;
+        this._distance_ease_timeline.connect('new-frame', () => {
+            this.display_distance = this._distance_ease_start + 
+                this._distance_ease_timeline.get_progress() * 
+                (toggle_display_distance_target - this._distance_ease_start);
+        });
+        this._is_display_distance_at_end = !this._is_display_distance_at_end;
+
+        this._distance_ease_timeline.start();
+    }
+
+    vfunc_build_pipeline() {
+        const code = getShaderSource(`${Globals.extension_dir}/IMUAdjust.frag`);
+        const main = 'PS_IMU_Transform(vec4(0, 0, 0, 0), cogl_tex_coord_in[0].xy, cogl_color_out);';
+        this.add_glsl_snippet(Shell.SnippetHook.FRAGMENT, code, main, false);
+    }
+
+    vfunc_paint_target(node, paintContext) {
+        var now = Date.now();
+        var lastPaint = this._last_paint || 0;
+        var frametime = this._frametime;
+        const data = Globals.ipc_file.load_contents(null);
+        if (data[0]) {
+            const buffer = new Uint8Array(data[1]).buffer;
+            this._dataView = new DataView(buffer);
+            if (!this._initialized) {
+                this.set_uniform_float(this.get_uniform_location('uDesktopTexture'), 1, [0]);
+                for (let key in shaderUniformLocations) {
+                    shaderUniformLocations[key] = this.get_uniform_location(key);
+                }
+                this.setIntermittentUniformVariables = setIntermittentUniformVariables.bind(this);
+                this.setIntermittentUniformVariables();
+
+                this._redraw_timeout_id = GLib.timeout_add(GLib.PRIORITY_DEFAULT, this._frametime, () => {
+                    if ((now - lastPaint) > frametime) global.stage.queue_redraw();
+                    return GLib.SOURCE_CONTINUE;
+                });
+
+                this._uniforms_timeout_id = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 250, (() => {
+                    this.setIntermittentUniformVariables();
+                    return GLib.SOURCE_CONTINUE;
+                }).bind(this));
+
+                this._initialized = true;
+            }
+
+            if (this._dataView.byteLength === DATA_VIEW_LENGTH) {
+                setSingleFloat(this, 'display_north_offset', this.display_distance);
+                setSingleFloat(this, 'look_ahead_ms', lookAheadMS(this._dataView));
+                setUniformMatrix(this, 'imu_quat_data', 4, this._dataView, IMU_QUAT_DATA);
+            } else if (this._dataView.byteLength !== 0) {
+                console.error(`Invalid dataView.byteLength: ${this._dataView.byteLength} !== ${DATA_VIEW_LENGTH}`)
+            }
+
+            // improves sampling quality for smooth text and edges
+            this.get_pipeline().set_layer_filters (
+                0,
+                Cogl.PipelineFilter.LINEAR_MIPMAP_LINEAR,
+                Cogl.PipelineFilter.LINEAR
+            );
+            
+            super.vfunc_paint_target(node, paintContext);
+        } else {
+            super.vfunc_paint_target(node, paintContext);
+        }
+        this._last_paint = now;
+    }
+
+    vfunc_dispose() {
+        if (this._redraw_timeout_id) GLib.source_remove(this._redraw_timeout_id);
+        if (this._uniforms_timeout_id) GLib.source_remove(this._uniforms_timeout_id);
+    }
+});

modules/xrealAirLinuxDriver

@@ -1 +1 @@
-Subproject commit 08c6b2a91c9ed5eba6fed66406f90980918406b4
+Subproject commit 0869b8686aa204b581c212ee20ad3d63dce0e73a

ui/COPYING

@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+
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+
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
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+
+  13. Use with the GNU Affero General Public License.
+
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+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
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+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
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+
+  If the Program specifies that a proxy can decide which future
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+to choose that version for the Program.
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+permissions.  However, no additional obligations are imposed on any
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+  15. Disclaimer of Warranty.
+
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+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
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+reviewing courts shall apply local law that most closely approximates
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+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/philosophy/why-not-lgpl.html>.
+

ui/README.md

@@ -0,0 +1,3 @@
+# breezydesktop
+
+A description of this project.

ui/bin/package

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# exit when any command fails
+set -e
+
+check_command() {
+    if ! command -v "$1" &>/dev/null; then
+        echo "Please install \"$1\" and make sure it's available in your \$PATH"
+        exit 1
+    fi
+}
+
+check_command "flatpak"
+check_command "flatpak-builder"
+
+# https://stackoverflow.com/a/246128
+SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
+
+TMP_DIR=$(mktemp -d -t breezy-ui-flatpak-XXXXXXXXXX)
+OUT_DIR=$SCRIPT_DIR/../out
+rm -rf $OUT_DIR
+mkdir -p $OUT_DIR
+
+flatpak-builder --force-clean $TMP_DIR/build $SCRIPT_DIR/../com.xronlinux.BreezyDesktop.json
+flatpak build-export $TMP_DIR/export $TMP_DIR/build
+flatpak build-bundle $TMP_DIR/export $OUT_DIR/com.xronlinux.BreezyDesktop.flatpak com.xronlinux.BreezyDesktop --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo

ui/build-aux/dconf-override.patch

@@ -0,0 +1,23 @@
+diff --git a/engine/dconf-engine-source-user.c b/engine/dconf-engine-source-user.c
+index 1657875..e4f8786 100644
+--- a/engine/dconf-engine-source-user.c
++++ b/engine/dconf-engine-source-user.c
+@@ -39,11 +39,17 @@ dconf_engine_source_user_open_gvdb (const gchar *name)
+ {
+   GvdbTable *table;
+   gchar *filename;
++  const gchar *override;
++
++  override = g_getenv ("DCONF_USER_CONFIG_DIR");
++  if (override == NULL)
++    filename = g_build_filename (g_get_user_config_dir (), "dconf", name, NULL);
++  else
++    filename = g_build_filename (g_get_home_dir (), override, name, NULL);
+ 
+   /* This can fail in the normal case of the user not having any
+    * settings.  That's OK and it shouldn't be considered as an error.
+    */
+-  filename = g_build_filename (g_get_user_config_dir (), "dconf", name, NULL);
+   table = gvdb_table_new (filename, FALSE, NULL);
+   g_free (filename);
+ 

ui/build-aux/start-breezy-desktop.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+# stolen from dconf-editor:
+# https://gitlab.gnome.org/GNOME/dconf-editor/-/blob/master/build-aux/start-dconf-editor.sh
+
+IFS=: read -ra host_data_dirs < <(flatpak-spawn --host sh -c 'echo "$XDG_DATA_DIRS"')
+
+# To avoid potentially muddying up $XDG_DATA_DIRS too much, we link the schema paths
+# into a temporary directory.
+bridge_dir=$XDG_RUNTIME_DIR/dconf-bridge
+mkdir -p "$bridge_dir"
+
+HOST_XDG_DATA_DIRS=""
+
+for dir in "${host_data_dirs[@]}"; do
+  if [[ "$dir" == /usr/* ]]; then
+    dir=/run/host/"$dir"
+  fi
+
+  schemas="$dir/glib-2.0/schemas"
+  if [[ -d "$schemas" ]]; then
+    bridged=$(mktemp -d XXXXXXXXXX -p "$bridge_dir")
+    mkdir -p "$bridged"/glib-2.0
+    ln -s "$schemas" "$bridged"/glib-2.0
+    HOST_XDG_DATA_DIRS="${HOST_XDG_DATA_DIRS}:${bridged}"
+  fi
+done
+
+# We MUST prepend the host's data dirs BEFORE the Flatpak environment's own dirs,
+# otherwise data (such as default values) load in the wrong order and would then
+# incorrectly prefer the Flatpak's internal defaults instead of the host's defaults!
+if [[ ! -z "${HOST_XDG_DATA_DIRS}" ]]; then
+  XDG_DATA_DIRS="${HOST_XDG_DATA_DIRS:1}:${XDG_DATA_DIRS}"
+fi
+
+export XDG_DATA_DIRS
+exec breezydesktop "$@"

ui/com.xronlinux.BreezyDesktop.json

@@ -0,0 +1,85 @@
+{
+    "id" : "com.xronlinux.BreezyDesktop",
+    "runtime" : "org.gnome.Platform",
+    "runtime-version" : "46",
+    "sdk" : "org.gnome.Sdk",
+    "command" : "breezydesktop",
+    "finish-args" : [
+        "--share=network",
+        "--share=ipc",
+        "--socket=fallback-x11",
+        "--device=dri",
+        "--socket=wayland",
+        "--device=shm",
+        "--talk-name=ca.desrt.dconf",
+        "--filesystem=xdg-run/dconf",
+        "--filesystem=host:ro",
+        "--env=DCONF_USER_CONFIG_DIR=.config/dconf",
+        "--env=GIO_EXTRA_MODULES=/app/lib/gio/modules/",
+        "--talk-name=org.freedesktop.Flatpak"
+    ],
+    "cleanup" : [
+        "/include",
+        "/lib/pkgconfig",
+        "/man",
+        "/share/doc",
+        "/share/gtk-doc",
+        "/share/man",
+        "/share/pkgconfig",
+        "*.la",
+        "*.a"
+    ],
+    "modules" : [
+        {
+            "name": "dconf",
+            "buildsystem": "meson",
+            "config-opts": [
+                "-Dbash_completion=false",
+                "-Dman=false",
+                "-Dsystemduserunitdir=' '"
+            ],
+            "cleanup": [
+                "/include",
+                "/lib/pkgconfig",
+                "/libexec",
+                "/share/dbus-1"
+            ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://download.gnome.org/sources/dconf/0.40/dconf-0.40.0.tar.xz",
+                    "sha256": "cf7f22a4c9200421d8d3325c5c1b8b93a36843650c9f95d6451e20f0bcb24533"
+                },
+                {
+                    "type": "patch",
+                    "path": "build-aux/dconf-override.patch"
+                }
+            ]
+        },
+        {
+            "name": "scripts",
+            "buildsystem": "simple",
+            "build-commands": [
+                "install -Dm 755 start-breezy-desktop.sh /app/bin/start-breezy-desktop"
+            ],
+            "sources": [
+                {
+                    "type": "file",
+                    "path": "build-aux/start-breezy-desktop.sh"
+                }
+            ]
+        },
+
+        {
+            "name" : "breezydesktop",
+            "builddir" : true,
+            "buildsystem" : "meson",
+            "sources" : [
+                {
+                    "type" : "dir",
+                    "path" : "."
+                }
+            ]
+        }
+    ]
+}

ui/data/com.xronlinux.BreezyDesktop.desktop.in

@@ -0,0 +1,8 @@
+[Desktop Entry]
+Name=Breezy Desktop
+Exec=start-breezy-desktop
+Icon=com.xronlinux.BreezyDesktop
+Terminal=false
+Type=Application
+Categories=GTK;
+StartupNotify=true

ui/data/com.xronlinux.BreezyDesktop.gschema.xml

@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<schemalist gettext-domain="breezydesktop">
+	<schema id="com.xronlinux.BreezyDesktop" path="/com/xronlinux/BreezyDesktop/">
+    <key name="effect-enable" type="b">
+      <default>
+        true
+      </default>
+      <summary>Enable XR effect</summary>
+      <description>
+        Enable XR effect
+      </description>
+    </key>
+    <key name="recenter-display-shortcut" type="as">
+      <default>
+        <![CDATA[['<Control><Super>space']]]>
+      </default>
+      <summary>Re-center display</summary>
+      <description>
+        Shortcut to re-center the virtual display.
+      </description>
+    </key>
+    <key name="toggle-display-distance-shortcut" type="as">
+      <default>
+        <![CDATA[['<Control><Super>Return']]]>
+      </default>
+      <summary>Trigger change to display distance</summary>
+      <description>
+        Shortcut to change the display distance.
+      </description>
+    </key>
+    <key name="toggle-follow-shortcut" type="as">
+      <default>
+        <![CDATA[['<Control><Super>0']]]>
+      </default>
+      <summary>Toggle follow mode</summary>
+      <description>
+        Shortcut to toggle follow mode.
+      </description>
+    </key>
+    <key name="display-distance" type="d">
+      <default>
+        1.05
+      </default>
+      <summary>Display distance</summary>
+      <description>
+        How far away the display appears. Farther will look smaller, closer will look larger.
+      </description>
+    </key>
+    <key name="toggle-display-distance-start" type="d">
+      <default>
+        0.85
+      </default>
+      <summary>Display distance start</summary>
+      <description>
+        Start distance when using the "change distance" shortcut.
+      </description>
+    </key>
+    <key name="toggle-display-distance-end" type="d">
+      <default>
+        1.05
+      </default>
+      <summary>Display distance end</summary>
+      <description>
+        End distance when using the "toggle display distance" shortcut.
+      </description>
+    </key>
+    <key name="developer-mode" type="b">
+      <default>
+        false
+      </default>
+      <summary>Developer mode</summary>
+      <description>
+        Enable developer mode
+      </description>
+    </key>
+	</schema>
+</schemalist>

ui/data/com.xronlinux.BreezyDesktop.metainfo.xml.in

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop">
+	<id>com.xronlinux.BreezyDesktop.desktop</id>
+	<metadata_license>CC0-1.0</metadata_license>
+	<project_license>GPL-3.0-or-later</project_license>
+	<description>
+	  <p>No description</p>
+	</description>
+</component>

ui/data/icons/hicolor/scalable/apps/com.xronlinux.BreezyDesktop.svg

@@ -0,0 +1,130 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   width="33.750061mm"
+   height="33.750061mm"
+   viewBox="0 0 33.750061 33.750061"
+   version="1.1"
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+    </g>
+  </g>
+</svg>

ui/data/icons/hicolor/symbolic/apps/com.xronlinux.BreezyDesktop-symbolic.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><g color="#000" fill="#2e3436"><path d="M7.188 2.281c-.094.056-.192.125-.29.19L5.566 3.803a1.684 1.684 0 11-2.17 2.17L2.332 7.037c.506-.069 1.017-.136 1.2.026.242.214.139 1.031.155 1.656.213.088.427.171.657.219.04.008.085-.007.125 0 .337-.525.683-1.288 1-1.344.322-.057.905.562 1.406.937a3.67 3.67 0 00.656-.468c-.195-.595-.594-1.369-.437-1.657.158-.29 1.019-.37 1.625-.531.028-.183.062-.371.062-.562 0-.075-.027-.146-.031-.22-.587-.217-1.435-.385-1.562-.687-.128-.302.34-1.021.593-1.593a3.722 3.722 0 00-.593-.532zm3.875 3.25c-.165.475-.305 1.086-.47 1.563-.43.047-.84.14-1.218.312-.38-.322-.787-.773-1.156-1.093a5.562 5.562 0 00-.688.468c.177.46.453 1.001.625 1.469-.298.309-.531.67-.719 1.063-.494 0-1.102-.084-1.593-.094a5.68 5.68 0 00-.219.812c.435.24 1.006.468 1.438.72-.006.093-.032.185-.032.28 0 .333.049.66.125.97-.382.304-.898.63-1.28.937.015.044.04.083.058.127l.613.613c.417-.1.868-.223 1.266-.303.248.343.532.626.875.875-.027.135-.068.283-.104.428.174-.063.34-.155.482-.297l1.432-1.432a1.994 1.994 0 01.533-3.918c.919 0 1.684.623 1.918 1.467l1.338-1.338c.06-.06.11-.124.156-.191-.035-.062-.06-.13-.1-.188.096-.152.205-.31.315-.47.017-.348-.1-.7-.37-.971l-.177-.176c-.28.192-.561.387-.83.555-.345-.233-.746-.383-1.156-.5-.077-.507-.107-1.132-.187-1.625a5.44 5.44 0 00-.875-.063zm-9.247.608c-.087.068-.173.138-.254.205l.014.035z" style="marker:none" overflow="visible"/><path d="M8.707.293a1 1 0 00-1.415 0l-6.999 7a1 1 0 000 1.413l7 7.001a1 1 0 001.415 0l7-7a1 1 0 000-1.413zm-.708 2.121l5.587 5.587L8 13.586 2.414 7.999z" style="line-height:normal;font-variant-ligatures:normal;font-variant-position:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-alternates:normal;font-feature-settings:normal;text-indent:0;text-align:start;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000;text-transform:none;text-orientation:mixed;shape-padding:0;isolation:auto;mix-blend-mode:normal;marker:none" font-weight="400" font-family="sans-serif" overflow="visible"/></g></svg>

ui/data/icons/meson.build

@@ -0,0 +1,13 @@
+application_id = 'com.xronlinux.BreezyDesktop'
+
+scalable_dir = 'hicolor' / 'scalable' / 'apps'
+install_data(
+  scalable_dir / ('@0@.svg').format(application_id),
+  install_dir: get_option('datadir') / 'icons' / scalable_dir
+)
+
+symbolic_dir = 'hicolor' / 'symbolic' / 'apps'
+install_data(
+  symbolic_dir / ('@0@-symbolic.svg').format(application_id),
+  install_dir: get_option('datadir') / 'icons' / symbolic_dir
+)

ui/data/meson.build

@@ -0,0 +1,36 @@
+desktop_file = i18n.merge_file(
+        input: 'com.xronlinux.BreezyDesktop.desktop.in',
+       output: 'com.xronlinux.BreezyDesktop.desktop',
+         type: 'desktop',
+       po_dir: '../po',
+      install: true,
+  install_dir: get_option('datadir') / 'applications'
+)
+
+desktop_utils = find_program('desktop-file-validate', required: false)
+if desktop_utils.found()
+  test('Validate desktop file', desktop_utils, args: [desktop_file])
+endif
+
+appstream_file = i18n.merge_file(
+        input: 'com.xronlinux.BreezyDesktop.metainfo.xml.in',
+       output: 'com.xronlinux.BreezyDesktop.metainfo.xml',
+       po_dir: '../po',
+      install: true,
+  install_dir: get_option('datadir') / 'metainfo'
+)
+
+appstreamcli = find_program('appstreamcli', required: false, disabler: true)
+test('Validate appstream file', appstreamcli,
+     args: ['validate', '--no-net', '--explain', appstream_file])
+
+install_data('com.xronlinux.BreezyDesktop.gschema.xml',
+  install_dir: get_option('datadir') / 'glib-2.0' / 'schemas'
+)
+
+compile_schemas = find_program('glib-compile-schemas', required: false, disabler: true)
+test('Validate schema file',
+     compile_schemas,
+     args: ['--strict', '--dry-run', meson.current_source_dir()])
+
+subdir('icons')

ui/meson.build

@@ -0,0 +1,20 @@
+project('breezydesktop',
+          version: '0.1.0',
+    meson_version: '>= 0.62.0',
+  default_options: [ 'warning_level=2', 'werror=false', ],
+)
+
+i18n = import('i18n')
+gnome = import('gnome')
+
+
+
+subdir('data')
+subdir('src')
+subdir('po')
+
+gnome.post_install(
+     glib_compile_schemas: true,
+    gtk_update_icon_cache: true,
+  update_desktop_database: true,
+)

ui/po/POTFILES

@@ -0,0 +1,6 @@
+data/com.xronlinux.BreezyDesktop.desktop.in
+data/com.xronlinux.BreezyDesktop.metainfo.xml.in
+data/com.xronlinux.BreezyDesktop.gschema.xml
+src/main.py
+src/window.py
+src/window.ui

ui/po/meson.build

@@ -0,0 +1 @@
+i18n.gettext('breezydesktop', preset: 'glib')

ui/src/breezydesktop.gresource.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/com/xronlinux/BreezyDesktop">
+    <file preprocess="xml-stripblanks">gtk/connected-device.ui</file>
+    <file preprocess="xml-stripblanks">gtk/no-device.ui</file>
+    <file preprocess="xml-stripblanks">gtk/shortcut-dialog.ui</file>
+    <file preprocess="xml-stripblanks">gtk/window.ui</file>
+  </gresource>
+</gresources>

ui/src/breezydesktop.in

@@ -0,0 +1,46 @@
+#!@PYTHON@
+
+# breezydesktop.in
+#
+# Copyright 2024 Unknown
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import os
+import sys
+import signal
+import locale
+import gettext
+
+VERSION = '@VERSION@'
+pkgdatadir = '@pkgdatadir@'
+localedir = '@localedir@'
+
+sys.path.insert(1, pkgdatadir)
+signal.signal(signal.SIGINT, signal.SIG_DFL)
+locale.bindtextdomain('breezydesktop', localedir)
+locale.textdomain('breezydesktop')
+gettext.install('breezydesktop', localedir)
+
+if __name__ == '__main__':
+    import gi
+
+    from gi.repository import Gio
+    resource = Gio.Resource.load(os.path.join(pkgdatadir, 'breezydesktop.gresource'))
+    resource._register()
+
+    from breezydesktop import main
+    sys.exit(main.main(VERSION))

ui/src/connecteddevice.py

@@ -0,0 +1,74 @@
+from gi.repository import Gio, Gtk, GObject
+from .settingsmanager import SettingsManager
+from .shortcutdialog import bind_shortcut_settings
+from .statemanager import StateManager
+from .xrdriveripc import XRDriverIPC
+
+@Gtk.Template(resource_path='/com/xronlinux/BreezyDesktop/gtk/connected-device.ui')
+class ConnectedDevice(Gtk.Box):
+    __gtype_name__ = "ConnectedDevice"
+
+    effect_enable_switch = Gtk.Template.Child()
+    display_distance_scale = Gtk.Template.Child()
+    follow_mode_switch = Gtk.Template.Child()
+    device_label = Gtk.Template.Child()
+    set_toggle_display_distance_start_button = Gtk.Template.Child()
+    set_toggle_display_distance_end_button = Gtk.Template.Child()
+    reassign_recenter_display_shortcut_button = Gtk.Template.Child()
+    recenter_display_shortcut_label = Gtk.Template.Child()
+    reassign_toggle_display_distance_shortcut_button = Gtk.Template.Child()
+    toggle_display_distance_shortcut_label = Gtk.Template.Child()
+    reassign_toggle_follow_shortcut_button = Gtk.Template.Child()
+    toggle_follow_shortcut_label = Gtk.Template.Child()
+
+    def __init__(self):
+        super(Gtk.Box, self).__init__()
+        self.init_template()
+        self.settings = SettingsManager.get_instance().settings
+        self.ipc = XRDriverIPC.get_instance()
+
+        self.settings.bind('display-distance', self.display_distance_scale, 'value', Gio.SettingsBindFlags.DEFAULT)
+        self.settings.bind('effect-enable', self.effect_enable_switch, 'active', Gio.SettingsBindFlags.DEFAULT)
+
+        bind_shortcut_settings(self.get_parent(), [
+            [self.reassign_recenter_display_shortcut_button, self.recenter_display_shortcut_label],
+            [self.reassign_toggle_display_distance_shortcut_button, self.toggle_display_distance_shortcut_label],
+            [self.reassign_toggle_follow_shortcut_button, self.toggle_follow_shortcut_label]
+        ])
+
+        self.bind_set_distance_toggle([
+            self.set_toggle_display_distance_start_button, 
+            self.set_toggle_display_distance_end_button
+        ])
+
+        self.state_manager = StateManager.get_instance()
+        self.state_manager.bind_property('follow-mode', self.follow_mode_switch, 'active', GObject.BindingFlags.DEFAULT)
+
+        self.follow_mode_switch.set_active(self.state_manager.follow_mode)
+        self.follow_mode_switch.connect('notify::active', self._request_follow_mode)
+
+    def _request_follow_mode(self, switch, param):
+        if (self.state_manager.follow_mode == switch.get_active()):
+            return
+        
+        self.ipc.write_control_flags({
+            'enable_breezy_desktop_smooth_follow': switch.get_active()
+        })
+
+    def set_device_name(self, name):
+        self.device_label.set_markup(f"<b>{name}</b>")
+            
+    def bind_set_distance_toggle(self, widgets):
+        for widget in widgets:
+            widget.connect('clicked', lambda *args, widget=widget: on_set_display_distance_toggle(widget))
+            reload_display_distance_toggle_button(widget)
+
+def reload_display_distance_toggle_button(widget):
+    distance = SettingsManager.get_instance().settings.get_double(widget.get_name())
+    if distance: widget.set_label(str(distance))
+
+def on_set_display_distance_toggle(widget):
+    settings = SettingsManager.get_instance().settings
+    distance = settings.get_double('display-distance')
+    settings.set_double(widget.get_name(), distance)
+    reload_display_distance_toggle_button(widget)

ui/src/gtk/connected-device.ui

@@ -0,0 +1,201 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="ConnectedDevice" parent="GtkBox">
+    <property name="orientation">1</property>
+    <property name="margin-top">20</property>
+    <property name="margin-bottom">20</property>
+    <property name="margin-start">20</property>
+    <property name="margin-end">20</property>
+    <property name="spacing">20</property>
+    <child>
+      <object class="GtkGrid">
+        <property name="column-spacing">4</property>
+        <child>
+          <object class="GtkLabel" id="device_label">
+            <property name="label">VITURE One</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkLabel">
+            <property name="label" translatable="yes">connected</property>
+          </object>
+        </child>
+      </object>
+    </child>
+    <child>
+      <object class="AdwPreferencesGroup">
+        <property name="title" translatable="true">Settings</property>
+        <child>
+          <object class="AdwActionRow">
+            <property name="title" translatable="true">Effect enabled</property>
+            <property name="subtitle" translatable="true">Turn on or off the XR desktop effect</property>
+            <child>
+              <object class="GtkSwitch" id="effect_enable_switch">
+                <property name="valign">3</property>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="AdwActionRow">
+            <property name="title" translatable="true">Display distance</property>
+            <child>
+              <object class="GtkScale">
+                <property name="valign">3</property>
+                <property name="draw-value">true</property>
+                <property name="value-pos">0</property>
+                <property name="digits">2</property>
+                <property name="width-request">350</property>
+                <property name="has-origin">false</property>
+                <property name="adjustment">
+                  <object class="GtkAdjustment" id="display_distance_scale">
+                    <property name="lower">0.2</property>
+                    <property name="upper">2.5</property>
+                    <property name="step-increment">0.01</property>
+                    <property name="value">1.05</property>
+                  </object>
+                </property>
+                <marks>
+                  <mark value="0.2" position="bottom"></mark>
+                  <mark value="1.0" position="bottom"></mark>
+                  <mark value="2.5" position="bottom"></mark>
+                </marks>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="AdwActionRow">
+            <property name="title" translatable="true">Follow enabled</property>
+            <property name="subtitle" translatable="true">Keep the virtual display near the center of your view</property>
+            <child>
+              <object class="GtkSwitch" id="follow_mode_switch">
+                <property name="valign">3</property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+    <child>
+      <object class="AdwPreferencesGroup">
+        <property name="title" translatable="true">Shortcuts</property>
+        <property name="description" translatable="true">Modify keyboard shortcuts and how they work</property>
+        <child>
+          <object class="AdwActionRow">
+            <property name="title" translatable="true">Re-center display shortcut</property>
+            <property name="subtitle" translatable="true">Pin the virtual display to the current position</property>
+            <property name="valign">2</property>
+            <child>
+              <object class="GtkBox">
+                <property name="spacing">30</property>
+                <property name="margin-start">30</property>
+                <child>
+                  <object class="GtkShortcutLabel" id="recenter_display_shortcut_label">
+                    <property name="valign">3</property>
+                    <property name="accelerator"></property>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkButton" id="reassign_recenter_display_shortcut_button">
+                    <style>
+                      <class name="row-button"/>
+                    </style>
+                    <property name="name">recenter-display-shortcut</property>
+                    <property name="valign">3</property>
+                    <property name="label" translatable="true">Change</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="AdwActionRow">
+            <property name="title" translatable="true">Display distance shortcut</property>
+            <property name="subtitle" translatable="true">Quickly toggle between two predefined distances</property>
+            <property name="valign">2</property>
+            <child>
+              <object class="GtkBox">
+                <property name="spacing">30</property>
+                <property name="margin-start">30</property>
+                <child>
+                  <object class="GtkShortcutLabel" id="toggle_display_distance_shortcut_label">
+                    <property name="valign">3</property>
+                    <property name="accelerator"></property>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkButton" id="reassign_toggle_display_distance_shortcut_button">
+                    <style>
+                      <class name="row-button"/>
+                    </style>
+                    <property name="name">toggle-display-distance-shortcut</property>
+                    <property name="valign">3</property>
+                    <property name="label" translatable="true">Change</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="AdwActionRow">
+            <property name="title" translatable="true">Display distance start and end</property>
+            <property name="subtitle" translatable="true">Use the buttons to capture the current display distance as start and end points.</property>
+            <property name="valign">2</property>
+            <child>
+              <object class="GtkBox">
+                <property name="spacing">30</property>
+                <property name="width-request">150</property>
+                <property name="margin-start">30</property>
+                <child>
+                  <object class="GtkButton" id="set_toggle_display_distance_start_button">
+                    <property name="name">toggle-display-distance-start</property>
+                    <property name="valign">3</property>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkButton" id="set_toggle_display_distance_end_button">
+                    <property name="name">toggle-display-distance-end</property>
+                    <property name="valign">3</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="AdwActionRow">
+            <property name="title" translatable="true">Toggle follow mode shortcut</property>
+            <property name="subtitle" translatable="true">Quickly toggle follow mode</property>
+            <property name="valign">2</property>
+            <child>
+              <object class="GtkBox">
+                <property name="spacing">30</property>
+                <property name="margin-start">30</property>
+                <child>
+                  <object class="GtkShortcutLabel" id="toggle_follow_shortcut_label">
+                    <property name="valign">3</property>
+                    <property name="accelerator"></property>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkButton" id="reassign_toggle_follow_shortcut_button">
+                    <style>
+                      <class name="row-button"/>
+                    </style>
+                    <property name="name">toggle-follow-shortcut</property>
+                    <property name="valign">3</property>
+                    <property name="label" translatable="true">Change</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>

ui/src/gtk/no-device.ui

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="NoDevice" parent="GtkBox">
+    <property name="orientation">1</property>
+    <property name="margin-top">20</property>
+    <property name="margin-bottom">20</property>
+    <property name="margin-start">20</property>
+    <property name="margin-end">20</property>
+    <property name="spacing">20</property>
+    <child>
+      <object class="AdwStatusPage">
+        <property name="title" translatable="true">No device connected</property>
+        <property name="description" translatable="true">Breezy Desktop was unable to detect any supported XR devices.</property>
+        <property name="width-request">650</property>
+      </object>
+    </child>
+  </template>
+</interface>

ui/src/gtk/shortcut-dialog.ui

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="ShortcutDialog" parent="GtkDialog">
+    <property name="modal">1</property>
+    <property name="default_width">440</property>
+    <property name="default_height">200</property>
+    <child internal-child="content_area">
+      <object class="GtkBox">
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <property name="margin-start">16</property>
+        <property name="margin-end">16</property>
+        <property name="margin-top">16</property>
+        <property name="margin-bottom">16</property>
+        <child>
+          <object class="GtkLabel">
+            <property name="vexpand">1</property>
+            <property name="label" translatable="yes">Press your keyboard shortcut or 'Backspace' to disable...</property>
+          </object>
+        </child>
+      </object>
+    </child>
+    <child type="titlebar">
+      <object class="GtkHeaderBar">
+        <property name="title-widget">
+          <object class="GtkLabel">
+            <property name="label" translatable="yes">Keyboard Shortcut</property>
+            <property name="single-line-mode">1</property>
+            <property name="ellipsize">end</property>
+            <property name="width-chars">5</property>
+            <style>
+              <class name="title"/>
+            </style>
+          </object>
+        </property>
+      </object>
+    </child>
+    <child>
+      <object class="GtkEventControllerKey" id="event_controller" />
+    </child>
+  </template>
+</interface>

ui/src/gtk/window.ui

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="BreezydesktopWindow" parent="GtkApplicationWindow">
+    <property name="default-width">800</property>
+    <property name="titlebar">
+      <object class="GtkHeaderBar" id="header_bar">
+        <property name="title-widget">
+          <object class="GtkLabel">
+            <property name="label" translatable="yes">Breezy Desktop</property>
+            <property name="single-line-mode">1</property>
+            <property name="ellipsize">end</property>
+            <property name="width-chars">5</property>
+            <style>
+              <class name="title"/>
+            </style>
+          </object>
+        </property>
+        <child type="end">
+          <object class="GtkMenuButton">
+            <property name="primary">True</property>
+            <property name="icon-name">open-menu-symbolic</property>
+            <property name="tooltip-text" translatable="yes">Menu</property>
+            <property name="menu-model">primary_menu</property>
+          </object>
+        </child>
+      </object>
+    </property>
+  </template>
+  <menu id="primary_menu">
+    <section>
+      <item>
+        <attribute name="label" translatable="yes">_About BreezyDesktop</attribute>
+        <attribute name="action">app.about</attribute>
+      </item>
+    </section>
+  </menu>
+</interface>

ui/src/main.py

@@ -0,0 +1,80 @@
+# main.py
+#
+# Copyright 2024 Unknown
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import sys
+import gi
+
+gi.require_version('Gtk', '4.0')
+gi.require_version('Adw', '1')
+gi.require_version('Gio', '2.0')
+
+from gi.repository import Adw, Gtk, Gio
+from .window import BreezydesktopWindow
+
+class BreezydesktopApplication(Adw.Application):
+    """The main application singleton class."""
+
+    def __init__(self):
+        super().__init__(application_id='com.xronlinux.BreezyDesktop',
+                         flags=Gio.ApplicationFlags.DEFAULT_FLAGS)
+        self.create_action('quit', lambda *_: self.quit(), ['<primary>q'])
+        self.create_action('about', self.on_about_action)
+
+    def do_activate(self):
+        """Called when the application is activated.
+
+        We raise the application's main window, creating it if
+        necessary.
+        """
+        win = self.props.active_window
+        if not win:
+            win = BreezydesktopWindow(application=self)
+        win.present()
+
+    def on_about_action(self, widget, _):
+        """Callback for the app.about action."""
+        about = Gtk.AboutDialog(transient_for=self.props.active_window,
+                                modal=True,
+                                program_name='Breezy Desktop',
+                                logo_icon_name='com.xronlinux.BreezyDesktop',
+                                version='0.1.0',
+                                authors=['Wayne Heaney'],
+                                copyright='© 2024 Wayne Heaney')
+        about.present()
+
+    def create_action(self, name, callback, shortcuts=None):
+        """Add an application action.
+
+        Args:
+            name: the name of the action
+            callback: the function to be called when the action is
+              activated
+            shortcuts: an optional list of accelerators
+        """
+        action = Gio.SimpleAction.new(name, None)
+        action.connect("activate", callback)
+        self.add_action(action)
+        if shortcuts:
+            self.set_accels_for_action(f"app.{name}", shortcuts)
+
+
+def main(version):
+    """The application's entry point."""
+    app = BreezydesktopApplication()
+    return app.run(sys.argv)

ui/src/meson.build

@@ -0,0 +1,41 @@
+pkgdatadir = get_option('prefix') / get_option('datadir') / meson.project_name()
+moduledir = pkgdatadir / 'breezydesktop'
+gnome = import('gnome')
+
+gnome.compile_resources('breezydesktop',
+  'breezydesktop.gresource.xml',
+  gresource_bundle: true,
+  install: true,
+  install_dir: pkgdatadir,
+)
+
+python = import('python')
+
+conf = configuration_data()
+conf.set('PYTHON', python.find_installation('python3').full_path())
+conf.set('VERSION', meson.project_version())
+conf.set('localedir', get_option('prefix') / get_option('localedir'))
+conf.set('pkgdatadir', pkgdatadir)
+
+configure_file(
+  input: 'breezydesktop.in',
+  output: 'breezydesktop',
+  configuration: conf,
+  install: true,
+  install_dir: get_option('bindir'),
+  install_mode: 'r-xr-xr-x'
+)
+
+breezydesktop_sources = [
+  '__init__.py',
+  'connecteddevice.py',
+  'main.py',
+  'nodevice.py',
+  'settingsmanager.py',
+  'shortcutdialog.py',
+  'statemanager.py',
+  'window.py',
+  'xrdriveripc.py'
+]
+
+install_data(breezydesktop_sources, install_dir: moduledir)

ui/src/nodevice.py

@@ -0,0 +1,5 @@
+from gi.repository import Adw, Gtk
+
+@Gtk.Template(resource_path='/com/xronlinux/BreezyDesktop/gtk/no-device.ui')
+class NoDevice(Gtk.Box):
+    __gtype_name__ = "NoDevice"

ui/src/settingsmanager.py

@@ -0,0 +1,15 @@
+
+from gi.repository import Gio
+
+class SettingsManager:
+    _instance = None
+
+    @staticmethod
+    def get_instance():
+        if not SettingsManager._instance:
+            SettingsManager._instance = SettingsManager()
+
+        return SettingsManager._instance
+
+    def __init__(self):
+        self.settings = Gio.Settings.new_with_path("com.xronlinux.BreezyDesktop", "/com/xronlinux/BreezyDesktop/")

ui/src/shortcutdialog.py

@@ -0,0 +1,109 @@
+from gi.repository import Gtk, Gdk
+
+from .settingsmanager import SettingsManager
+
+# ported from https://github.com/velitasali/gnome-shell-extension-awesome-tiles
+@Gtk.Template(resource_path='/com/xronlinux/BreezyDesktop/gtk/shortcut-dialog.ui')
+class ShortcutDialog(Gtk.Dialog):
+    __gtype_name__ = 'ShortcutDialog'
+
+    event_controller = Gtk.Template.Child()
+
+    def __init__(self, settings_key):
+        super(Gtk.Dialog, self).__init__()
+        self.init_template()
+
+        self.settings_key = settings_key
+        self.key_pressed_connect_id = self.event_controller.connect('key-pressed', self._on_key_pressed)
+
+    def _on_key_pressed(self, widget, keyval, keycode, state):
+        mask = state & Gtk.accelerator_get_default_mod_mask()
+        mask &= ~Gdk.ModifierType.LOCK_MASK
+
+        done = True
+        if mask == 0 and keyval == Gdk.KEY_Escape:
+            self.visible = False
+        elif keyval == Gdk.KEY_BackSpace:
+            SettingsManager.get_instance().settings.set_strv(self.settings_key, [])
+            self.close()
+        elif is_binding_valid(mask, keycode, keyval) and is_accel_valid(state, keyval):
+            binding = Gtk.accelerator_name_with_keycode(
+                None,
+                keyval,
+                keycode,
+                state
+            )
+            label = Gtk.accelerator_get_label(keyval, state)
+
+            # hacky way to store the label, causes warnings from the WM
+            SettingsManager.get_instance().settings.set_strv(self.settings_key, [binding])
+
+            self.close()
+        else:
+            done = False
+        
+        if done and self.key_pressed_connect_id:
+            self.event_controller.disconnect(self.key_pressed_connect_id)
+            self.key_pressed_connect_id = None
+
+        return Gdk.EVENT_STOP
+
+def is_binding_valid(mask, keycode, keyval):
+    if mask == 0 or mask == Gdk.ModifierType.SHIFT_MASK and keycode != 0:
+        if keyval >= Gdk.KEY_a and keyval <= Gdk.KEY_z or \
+            keyval >= Gdk.KEY_A and keyval <= Gdk.KEY_Z or \
+            keyval >= Gdk.KEY_0 and keyval <= Gdk.KEY_9 or \
+            keyval >= Gdk.KEY_kana_fullstop and keyval <= Gdk.KEY_semivoicedsound or \
+            keyval >= Gdk.KEY_Arabic_comma and keyval <= Gdk.KEY_Arabic_sukun or \
+            keyval >= Gdk.KEY_Serbian_dje and keyval <= Gdk.KEY_Cyrillic_HARDSIGN or \
+            keyval >= Gdk.KEY_Greek_ALPHAaccent and keyval <= Gdk.KEY_Greek_omega or \
+            keyval >= Gdk.KEY_hebrew_doublelowline and keyval <= Gdk.KEY_hebrew_taf or \
+            keyval >= Gdk.KEY_Thai_kokai and keyval <= Gdk.KEY_Thai_lekkao or \
+            keyval >= Gdk.KEY_Hangul_Kiyeog and keyval <= Gdk.KEY_Hangul_J_YeorinHieuh or \
+            keyval == Gdk.KEY_space and mask == 0 or \
+            is_keyval_forbidden(keyval):
+            return False
+    return True
+
+def is_keyval_forbidden(keyval):
+    forbidden_keyvals = [
+        Gdk.KEY_Home,
+        Gdk.KEY_Left,
+        Gdk.KEY_Up,
+        Gdk.KEY_Right,
+        Gdk.KEY_Down,
+        Gdk.KEY_Page_Up,
+        Gdk.KEY_Page_Down,
+        Gdk.KEY_End,
+        Gdk.KEY_Tab,
+        Gdk.KEY_KP_Enter,
+        Gdk.KEY_Return,
+        Gdk.KEY_Mode_switch
+    ]
+    return keyval in forbidden_keyvals
+
+def is_accel_valid(mask, keyval):
+    return Gtk.accelerator_valid(keyval, mask) or (keyval == Gdk.KEY_Tab and mask != 0)
+
+def bind_shortcut_settings(window, widget_tuples):
+    for widget_tuple in widget_tuples:
+        widget, label = widget_tuple
+        SettingsManager.get_instance().settings.connect('changed::' + widget.get_name(), 
+                                                        lambda *args, widget=widget, label=label: reload_shortcut_widget(widget, label))
+        widget.connect('clicked', lambda *args, widget=widget: on_assign_shortcut(window, widget))
+
+    reload_shortcut_widgets(widget_tuples)
+
+def on_assign_shortcut(window, widget):
+    dialog = ShortcutDialog(widget.get_name())
+    dialog.set_transient_for(widget.get_ancestor(Gtk.Window))
+    dialog.present()
+
+def reload_shortcut_widget(widget, label):
+    shortcut = SettingsManager.get_instance().settings.get_strv(widget.get_name())
+    label.set_accelerator(shortcut[0] if len(shortcut) > 0 else 'Disabled')
+
+def reload_shortcut_widgets(widget_tuples):
+    for widget_tuple in widget_tuples:
+        widget, label = widget_tuple
+        reload_shortcut_widget(widget, label)

ui/src/statemanager.py

@@ -0,0 +1,68 @@
+import threading
+from gi.repository import GObject
+from .xrdriveripc import XRDriverIPC
+
+class Logger:
+    def info(self, message):
+        print(message)
+
+    def error(self, message):
+        print(message)
+
+class StateManager(GObject.GObject):
+    __gsignals__ = {
+        'device-update': (GObject.SIGNAL_RUN_FIRST, None, (str,))
+    }
+
+    __gproperties__ = {
+        'follow-mode': (bool, 'Follow Mode', 'Whether the follow mode is enabled', False, GObject.ParamFlags.READWRITE)
+    }
+
+    _instance = None
+
+    @staticmethod
+    def get_instance():
+        if not StateManager._instance:
+            StateManager._instance = StateManager()
+
+        return StateManager._instance
+
+    @staticmethod
+    def device_name(state):
+        if state.get('connected_device_brand') and state.get('connected_device_model'):
+            return f"{state['connected_device_brand']} {state['connected_device_model']}"
+
+        return None
+
+    def __init__(self):
+        GObject.GObject.__init__(self)
+        self.ipc = XRDriverIPC.get_instance()
+        self.connected_device_name = None
+
+        self.start()
+
+    def start(self):
+        self.running = True
+        self._refresh_state()
+
+    def stop(self):
+        self.running = False
+
+    def _refresh_state(self):
+        self.state = self.ipc.retrieve_driver_state()
+        new_device_name = StateManager.device_name(self.state)
+        if self.connected_device_name != new_device_name:
+            self.connected_device_name = new_device_name
+            self.emit('device-update', self.connected_device_name)
+
+        self.set_property('follow-mode', self.state.get('breezy_desktop_smooth_follow_enabled'))
+
+        if self.running: threading.Timer(1.0, self._refresh_state).start()
+
+    def do_set_property(self, prop, value):
+        if prop.name == 'follow-mode':
+            self.follow_mode = value
+
+    def do_get_property(self, prop):
+        if prop.name == 'follow-mode':
+            return self.follow_mode

ui/src/window.py

@@ -0,0 +1,45 @@
+# window.py
+#
+# Copyright 2024 Unknown
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from gi.repository import Gtk
+from .statemanager import StateManager
+from .connecteddevice import ConnectedDevice
+from .nodevice import NoDevice
+
+@Gtk.Template(resource_path='/com/xronlinux/BreezyDesktop/gtk/window.ui')
+class BreezydesktopWindow(Gtk.ApplicationWindow):
+    __gtype_name__ = 'BreezydesktopWindow'
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+        state_manager = StateManager.get_instance()
+        state_manager.connect('device-update', self._handle_device_update)
+
+        self.connected_device = ConnectedDevice()
+        self.no_device = NoDevice()
+
+        self._handle_device_update(state_manager, StateManager.device_name(state_manager.state))
+
+    def _handle_device_update(self, state_manager, connected_device_name):
+        if connected_device_name:
+            self.set_child(self.connected_device)
+            self.connected_device.set_device_name(connected_device_name)
+        else:
+            self.set_child(self.no_device)

ui/src/xrdriveripc.py

@@ -0,0 +1,297 @@
+import json
+import os
+import pwd
+import stat
+import subprocess
+import time
+
+# write-only file that the driver reads (but never writes) to get user-specified control flags
+CONTROL_FLAGS_FILE_PATH = '/dev/shm/xr_driver_control'
+
+# read-only file that the driver writes (but never reads) to with its current state
+DRIVER_STATE_FILE_PATH = '/dev/shm/xr_driver_state'
+
+CONTROL_FLAGS = ['recenter_screen', 'recalibrate', 'sbs_mode', 'refresh_device_license', 'enable_breezy_desktop_smooth_follow']
+SBS_MODE_VALUES = ['unset', 'enable', 'disable']
+MANAGED_EXTERNAL_MODES = ['virtual_display', 'sideview', 'none']
+VR_LITE_OUTPUT_MODES = ['mouse', 'joystick']
+
+def parse_boolean(value, default):
+    if not value:
+        return default
+
+    return value.lower() == 'true'
+
+
+def parse_int(value, default):
+    return int(value) if value.isdigit() else default
+
+def parse_float(value, default):
+    try:
+        return float(value)
+    except ValueError:
+        return default
+
+def parse_string(value, default):
+    return value if value else default
+
+def parse_array(value, default):
+    return value.split(",") if value else default
+
+
+CONFIG_PARSER_INDEX = 0
+CONFIG_DEFAULT_VALUE_INDEX = 1
+CONFIG_ENTRIES = {
+    'disabled': [parse_boolean, True],
+    'output_mode': [parse_string, 'mouse'],
+    'external_mode': [parse_array, 'none'],
+    'mouse_sensitivity': [parse_int, 30],
+    'display_zoom': [parse_float, 1.0],
+    'look_ahead': [parse_int, 0],
+    'sbs_display_size': [parse_float, 1.0],
+    'sbs_display_distance': [parse_float, 1.0],
+    'sbs_content': [parse_boolean, False],
+    'sbs_mode_stretched': [parse_boolean, False],
+    'sideview_position': [parse_string, 'center'],
+    'sideview_display_size': [parse_float, 1.0],
+    'virtual_display_smooth_follow_enabled': [parse_boolean, False],
+    'sideview_smooth_follow_enabled': [parse_boolean, False]
+}
+
+class Logger:
+    def info(self, message):
+        print(message)
+
+    def error(self, message):
+        print(message)
+
+class XRDriverIPC:
+    _instance = None
+
+    @staticmethod
+    def get_instance():
+        if not XRDriverIPC._instance:
+            XRDriverIPC._instance = XRDriverIPC()
+
+        return XRDriverIPC._instance
+
+    def __init__(self, logger=Logger(), user=None, user_home=None):
+        self.breezy_installed = False
+        self.breezy_installing = False
+        self.user = user if user else pwd.getpwuid( os.getuid() )[0]
+        self.user_home = user_home if user_home else os.path.expanduser("~")
+        self.config_file_path = os.path.join(self.user_home, ".xreal_driver_config")
+        self.config_script_path = os.path.join(self.user_home, "bin/xreal_driver_config")
+        self.logger = logger
+
+    def retrieve_config(self):
+        config = {}
+        for key, value in CONFIG_ENTRIES.items():
+            config[key] = value[CONFIG_DEFAULT_VALUE_INDEX]
+
+        try:
+            with open(self.config_file_path, 'r') as f:
+                for line in f:
+                    try:
+                        if not line.strip():
+                            continue
+
+                        key, value = line.strip().split('=')
+                        if key in CONFIG_ENTRIES:
+                            parser = CONFIG_ENTRIES[key][CONFIG_PARSER_INDEX]
+                            default_val = CONFIG_ENTRIES[key][CONFIG_DEFAULT_VALUE_INDEX]
+                            config[key] = parser(value, default_val)
+                    except Exception as e:
+                        self.logger.error(f"Error parsing line {line}: {e}")
+        except FileNotFoundError as e:
+            self.logger.error(f"Config file not found {e}")
+            return config
+
+        config['ui_view'] = self.build_ui_view(config)
+
+        return config
+
+    def write_config(self, config):
+        try:
+            output = ""
+
+            # Since the UI doesn't refresh the config before it updates, the external_mode can get out of sync with
+            # what's on disk. To avoid losing external_mode values, we retrieve the previous configs to preserve
+            # any non-managed external modes.
+            old_config = self._retrieve_config(self)
+
+            # remove the UI's "view" data, translate back to config values, and merge them in
+            view = config.pop('ui_view', None)
+            config.update(self.headset_mode_to_config(view['headset_mode'], view['is_joystick_mode'], old_config['external_mode']))
+
+            for key, value in config.items():
+                if key != "updated":
+                    if isinstance(value, bool):
+                        output += f'{key}={str(value).lower()}\n'
+                    elif isinstance(value, int):
+                        output += f'{key}={value}\n'
+                    elif isinstance(value, list):
+                        output += f'{key}={",".join(value)}\n'
+                    else:
+                        output += f'{key}={value}\n'
+
+            temp_file = "temp.txt"
+
+            # Write to a temporary file
+            with open(temp_file, 'w') as f:
+                f.write(output)
+
+            # Atomically replace the old config file with the new one
+            os.replace(temp_file, self.config_file_path)
+            os.chmod(self.config_file_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP | stat.S_IROTH | stat.S_IWOTH)
+
+            config['ui_view'] = self.build_ui_view(self, config)
+
+            return config
+        except Exception as e:
+            self.logger.error(f"Error writing config {e}")
+            raise e
+
+    # like a SQL "view," these are computed values that are commonly used in the UI
+    def build_ui_view(self, config):
+        view = {}
+        view['headset_mode'] = self.config_to_headset_mode(config)
+        view['is_joystick_mode'] = config['output_mode'] == 'joystick'
+        return view
+
+    def filter_to_other_external_modes(self, external_modes):
+        return [mode for mode in external_modes if mode not in MANAGED_EXTERNAL_MODES]
+
+    def headset_mode_to_config(self, headset_mode, joystick_mode, old_external_modes):
+        new_external_modes = self.filter_to_other_external_modes(old_external_modes)
+
+        config = {}
+        if headset_mode == "virtual_display":
+            # TODO - uncomment this when the driver can support multiple external_mode values
+            # new_external_modes.append("virtual_display")
+            new_external_modes = ["virtual_display"]
+            config['output_mode'] = "external_only"
+            config['disabled'] = False
+        elif headset_mode == "vr_lite":
+            config['output_mode'] = "joystick" if joystick_mode else "mouse"
+            config['disabled'] = False
+        elif headset_mode == "sideview":
+            # TODO - uncomment this when the driver can support multiple external_mode values
+            # new_external_modes.append("sideview")
+            new_external_modes = ["sideview"]
+            config['output_mode'] = "external_only"
+            config['disabled'] = False
+        else:
+            config['output_mode'] = "external_only"
+
+        has_external_mode = len(new_external_modes) > 0
+        if not has_external_mode:
+            new_external_modes.append("none")
+        config['external_mode'] = new_external_modes
+
+        return config
+
+    def config_to_headset_mode(self, config):
+        if not config or config['disabled']:
+            return "disabled"
+
+        if config['output_mode'] in VR_LITE_OUTPUT_MODES:
+            return "vr_lite"
+
+        managed_mode = next((mode for mode in MANAGED_EXTERNAL_MODES if mode in config['external_mode']), None)
+        if managed_mode and managed_mode != "none":
+            return managed_mode
+
+        return "disabled"
+
+    def write_control_flags(self, control_flags):
+        try:
+            output = ""
+            for key, value in control_flags.items():
+                if key in CONTROL_FLAGS:
+                    if key == 'sbs_mode':
+                        if value not in SBS_MODE_VALUES:
+                            self.logger.error(f"Invalid value {value} for sbs_mode flag")
+                            continue
+                    elif not isinstance(value, bool):
+                        self.logger.error(f"Invalid value {value} for {key} flag")
+                        continue
+                    output += f'{key}={str(value).lower()}\n'
+
+            with open(CONTROL_FLAGS_FILE_PATH, 'w') as f:
+                f.write(output)
+        except Exception as e:
+            self.logger.error(f"Error writing control flags {e}")
+
+    def retrieve_driver_state(self):
+        state = {}
+        state['heartbeat'] = 0
+        state['connected_device_brand'] = None
+        state['connected_device_model'] = None
+        state['calibration_setup'] = "AUTOMATIC"
+        state['calibration_state'] = "NOT_CALIBRATED"
+        state['sbs_mode_enabled'] = False
+        state['sbs_mode_supported'] = False
+        state['firmware_update_recommended'] = False
+        state['device_license'] = {}
+        state['breezy_desktop_smooth_follow_enabled'] = False
+
+        try:
+            with open(DRIVER_STATE_FILE_PATH, 'r') as f:
+                output = f.read()
+                for line in output.splitlines():
+                    try:
+                        if not line.strip():
+                            continue
+
+                        key, value = line.strip().split('=')
+                        if key == 'heartbeat':
+                            state[key] = parse_int(value, 0)
+                        elif key in ['calibration_setup', 'calibration_state', 'connected_device_brand', 'connected_device_model']:
+                            state[key] = value
+                        elif key in ['sbs_mode_enabled', 'sbs_mode_supported', 'firmware_update_recommended', 'breezy_desktop_smooth_follow_enabled']:
+                            state[key] = parse_boolean(value, False)
+                        elif key == 'device_license':
+                            state[key] = json.loads(value)
+                    except Exception as e:
+                        self.logger.error(f"Error parsing key-value pair {key}={value}: {e}")
+        except FileNotFoundError:
+            pass
+
+        # state is stale, just send the license
+        if state['heartbeat'] == 0 or (time.time() - state['heartbeat']) > 5:
+            return {
+                'heartbeat': state['heartbeat'],
+                'device_license': state['device_license']
+            }
+
+        return state
+
+    async def request_token(self, email):
+        self.logger.info(f"Requesting a new token for {email}")
+
+        # Set the USER environment variable for this command
+        env_copy = os.environ.copy()
+        env_copy["USER"] = self.user
+
+        try:
+            output = subprocess.check_output([self.config_script_path, "--request-token", email], stderr=subprocess.STDOUT, env=env_copy)
+            return output.strip() == b"Token request sent"
+        except subprocess.CalledProcessError as exc:
+            self.logger.error(f"Error running config script {exc.output}")
+            return False
+
+    async def verify_token(self, token):
+        self.logger.info(f"Verifying token {token}")
+
+        # Set the USER environment variable for this command
+        env_copy = os.environ.copy()
+        env_copy["USER"] = self.user
+
+        try:
+            output = subprocess.check_output([self.config_script_path, "--verify-token", token], stderr=subprocess.STDOUT, env=env_copy)
+            return output.strip() == b"Token verified"
+        except subprocess.CalledProcessError as exc:
+            self.logger.error(f"Error running config script {exc.output}")
+            return False
+