Added a game installation detector

Author: cohaereo

CHANGELOG.md

@@ -33,6 +33,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 ### ✨ Major Features
 - Reworked the map loading mechanism to allow for maps to be loaded individually by @cohaereo
 - Added a map and activity browser by @cohaereo
+- Added a game installation detector by @cohaereo
 
 ### Added
 

Cargo.lock

@@ -89,6 +89,7 @@ build-time = "0.1.3"
 rustc-hash = "1.1.0"
 once_cell = "1.19.0"
 directories = "5.0.1"
+game-detector = "0.1.1"
 
 [features]
 default = ["discord_rpc"]

Cargo.toml

@@ -0,0 +1,163 @@
+use std::{mem::transmute, sync::Arc, time::Duration};
+
+use game_detector::InstalledGame;
+use windows::Win32::{
+    Foundation::DXGI_STATUS_OCCLUDED,
+    Graphics::{
+        Direct3D11::ID3D11Texture2D,
+        Dxgi::{
+            Common::DXGI_FORMAT_B8G8R8A8_UNORM, DXGI_PRESENT_TEST, DXGI_SWAP_EFFECT_SEQUENTIAL,
+        },
+    },
+};
+use winit::{
+    dpi::PhysicalSize,
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoop},
+    platform::run_return::EventLoopExtRunReturn,
+};
+
+use crate::{
+    icons::{ICON_CONTROLLER, ICON_MICROSOFT, ICON_STEAM},
+    overlays::{
+        big_button::BigButton,
+        gui::{GuiManager, PreDrawResult},
+    },
+    render::DeviceContextSwapchain,
+    resources::Resources,
+};
+
+/// Creates a temporary window with egui to select a game installation
+/// This function should not be called in another render loop, as it will hang until this function completes
+pub fn select_game_installation(event_loop: &mut EventLoop<()>) -> anyhow::Result<String> {
+    let window = winit::window::WindowBuilder::new()
+        .with_title("Alkahest")
+        .with_inner_size(PhysicalSize::new(320, 320))
+        .with_min_inner_size(PhysicalSize::new(320, 480))
+        .build(event_loop)?;
+
+    let window = Arc::new(window);
+
+    let dcs = Arc::new(DeviceContextSwapchain::create(&window)?);
+    let mut gui = GuiManager::create(&window, dcs.clone());
+    let mut empty_resources = Resources::default();
+
+    let mut present_parameters = 0;
+    let mut selected_path = Err(anyhow::anyhow!("No game installation selected"));
+
+    let mut installations = game_detector::find_all_games();
+    installations.retain(|i| match i {
+        InstalledGame::Steam(a) => a.appid == 1085660,
+        InstalledGame::EpicGames(m) => m.display_name == "Destiny 2",
+        InstalledGame::MicrosoftStore(p) => p.app_name == "Destiny2PCbasegame",
+        _ => false,
+    });
+
+    event_loop.run_return(|event, _, control_flow| match &event {
+        Event::WindowEvent { event, .. } => {
+            let _ = gui.handle_event(event);
+
+            match event {
+                WindowEvent::Resized(new_dims) => unsafe {
+                    let _ = gui
+                        .renderer
+                        .resize_buffers(transmute(&dcs.swap_chain), || {
+                            *dcs.swapchain_target.write() = None;
+                            dcs.swap_chain
+                                .ResizeBuffers(
+                                    1,
+                                    new_dims.width,
+                                    new_dims.height,
+                                    DXGI_FORMAT_B8G8R8A8_UNORM,
+                                    0,
+                                )
+                                .expect("Failed to resize swapchain");
+
+                            let bb: ID3D11Texture2D = dcs.swap_chain.GetBuffer(0).unwrap();
+
+                            let new_rtv = dcs.device.CreateRenderTargetView(&bb, None).unwrap();
+
+                            dcs.context()
+                                .OMSetRenderTargets(Some(&[Some(new_rtv.clone())]), None);
+
+                            *dcs.swapchain_target.write() = Some(new_rtv);
+
+                            transmute(0i32)
+                        })
+                        .unwrap();
+                },
+                WindowEvent::CloseRequested => {
+                    *control_flow = ControlFlow::Exit;
+                }
+                _ => (),
+            }
+        }
+        Event::RedrawRequested(..) => {
+            gui.draw_frame(
+                window.clone(),
+                &mut empty_resources,
+                |ctx, _resources| {
+                    egui::CentralPanel::default().show(ctx, |ui| {
+                        ui.heading("Select Destiny 2 installation");
+                        for i in &installations {
+                            let (icon, store_name, path) = match i {
+                                InstalledGame::Steam(a) => {
+                                    (ICON_STEAM, "Steam", a.game_path.clone())
+                                }
+                                InstalledGame::EpicGames(e) => {
+                                    (ICON_CONTROLLER, "Epic Games", e.install_location.clone())
+                                }
+                                InstalledGame::MicrosoftStore(p) => {
+                                    (ICON_MICROSOFT, "Microsoft Store", p.path.clone())
+                                }
+                                _ => continue,
+                            };
+
+                            if BigButton::new(icon, store_name)
+                                .with_subtext(&path)
+                                .full_width()
+                                .ui(ui)
+                                .clicked()
+                            {
+                                selected_path = Ok(path.clone());
+                                *control_flow = ControlFlow::Exit;
+                            }
+                        }
+
+                        // if BigButton::new(ICON_FOLDER_OPEN, "Browse")
+                        //     .full_width()
+                        //     .ui(ui)
+                        //     .clicked()
+                        // {
+                        //     let dialog = native_dialog::FileDialog::new()
+                        //         .set_title("Select Destiny 2 packages directory")
+                        //         .show_open_single_dir()?;
+                        // }
+                    });
+
+                    PreDrawResult::Continue
+                },
+                |_, _| {},
+            );
+
+            unsafe {
+                if dcs
+                    .swap_chain
+                    .Present(DXGI_SWAP_EFFECT_SEQUENTIAL.0 as _, present_parameters)
+                    == DXGI_STATUS_OCCLUDED
+                {
+                    present_parameters = DXGI_PRESENT_TEST;
+                    std::thread::sleep(Duration::from_millis(50));
+                } else {
+                    present_parameters = 0;
+                }
+            }
+        }
+        Event::MainEventsCleared => {
+            window.request_redraw();
+        }
+        _ => (),
+    });
+
+    selected_path
+}

src/game_selector.rs

@@ -113,6 +113,7 @@ mod config;
 mod discord;
 mod dxbc;
 mod ecs;
+mod game_selector;
 mod hotkeys;
 mod icons;
 mod input;
@@ -210,6 +211,7 @@ pub async fn main() -> anyhow::Result<()> {
     )
     .expect("Failed to set up the tracing subscriber");
 
+    let mut event_loop = EventLoop::new();
     let package_dir = if let Some(p) = &args.package_dir {
         if p.ends_with(".pkg") {
             warn!("Please specify the directory containing the packages, not the package itself! Support for this will be removed in the future!");
@@ -224,9 +226,25 @@ pub async fn main() -> anyhow::Result<()> {
     } else if let Some(p) = config::with(|c| c.packages_directory.clone()) {
         PathBuf::from_str(&p).context("Invalid package directory")?
     } else {
-        panic!("No package directory specified")
+        let path = PathBuf::from_str(
+            &game_selector::select_game_installation(&mut event_loop)
+                .context("No game installation selected")?,
+        )
+        .unwrap();
+
+        path.join("packages")
     };
 
+    if !package_dir.exists() {
+        config::with_mut(|c| c.packages_directory = None);
+        config::persist();
+
+        panic!(
+            "The specified package directory does not exist! ({})\nRelaunch alkahest with a valid package directory.",
+            package_dir.display()
+        );
+    }
+
     let pm = info_span!("Initializing package manager")
         .in_scope(|| PackageManager::new(package_dir, PackageVersion::Destiny2Lightfall).unwrap());
 
@@ -235,7 +253,6 @@ pub async fn main() -> anyhow::Result<()> {
 
     *PACKAGE_MANAGER.write() = Some(Arc::new(pm));
 
-    let event_loop = EventLoop::new();
     let window = winit::window::WindowBuilder::new()
         .with_title("Alkahest")
         .with_inner_size(config::with(|c| {