From fdf4b5c82ccb1d30983210a350576b9b3156fbbc Mon Sep 17 00:00:00 2001
From: Evan Pratten <ewpratten@gmail.com>
Date: Thu, 17 Mar 2022 16:48:10 -0400
Subject: [PATCH] Allow blank window rendering

---
 .vscode/settings.json                         |  6 +++++-
 game/game_logic/src/lib.rs                    | 11 +++++++++-
 game/game_logic/src/persistent/settings.rs    |  5 +++--
 game/game_logic/src/rendering/event_loop.rs   | 20 +++++++++++++++++++
 game/game_logic/src/rendering/mod.rs          |  3 +++
 .../game_logic/src/rendering/utilities/mod.rs |  0
 6 files changed, 41 insertions(+), 4 deletions(-)
 create mode 100644 game/game_logic/src/rendering/event_loop.rs
 create mode 100644 game/game_logic/src/rendering/mod.rs
 create mode 100644 game/game_logic/src/rendering/utilities/mod.rs

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 93dc280f..6f61c03a 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,3 +1,7 @@
 {
-    "git.detectSubmodules": false
+    "git.detectSubmodules": false,
+    "cSpell.words": [
+        "msaa",
+        "vsync"
+    ]
 }
\ No newline at end of file
diff --git a/game/game_logic/src/lib.rs b/game/game_logic/src/lib.rs
index b1f9531b..414832f0 100644
--- a/game/game_logic/src/lib.rs
+++ b/game/game_logic/src/lib.rs
@@ -1,6 +1,9 @@
 //! This file is the main entry point for the game logic.
 
+use std::borrow::Borrow;
+
 pub(crate) mod persistent;
+pub(crate) mod rendering;
 
 /// This is the game logic entrypoint. Despite being async,
 /// this is expected to block the main thread for rendering and stuff.
@@ -15,7 +18,13 @@ pub async fn entrypoint() {
     let mut save_state = persistent::save_state::GameSaveState::load_or_create()
         .expect("Failed to parse game save state from disk. Possibly corrupt file?");
 
-    // TODO: Blocking game loop goes here
+    // Blocking call to the graphics rendering loop.
+    rendering::event_loop::handle_graphics_blocking(
+        |builder| {
+            builder.msaa_4x().vsync();
+        },
+        settings.target_fps,
+    );
 
     // Clean up any resources
     settings
diff --git a/game/game_logic/src/persistent/settings.rs b/game/game_logic/src/persistent/settings.rs
index 6d2e7268..f74b33d3 100644
--- a/game/game_logic/src/persistent/settings.rs
+++ b/game/game_logic/src/persistent/settings.rs
@@ -9,13 +9,14 @@ use serde::{Deserialize, Serialize};
 /// Please don't add anything relating to gameplay though (no coins, health, etc.).
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct PersistentGameSettings {
-    // TODO: Add settings here.
+    /// The target framerate for the game
+    pub target_fps: u32,
 }
 
 // Add any default values here.
 impl Default for PersistentGameSettings {
     fn default() -> Self {
-        Self {}
+        Self { target_fps: 60 }
     }
 }
 
diff --git a/game/game_logic/src/rendering/event_loop.rs b/game/game_logic/src/rendering/event_loop.rs
new file mode 100644
index 00000000..cfb693a3
--- /dev/null
+++ b/game/game_logic/src/rendering/event_loop.rs
@@ -0,0 +1,20 @@
+use raylib::RaylibBuilder;
+
+pub fn handle_graphics_blocking<ConfigBuilder>(config: ConfigBuilder, target_frames_per_second: u32)
+where
+    ConfigBuilder: FnOnce(&mut RaylibBuilder),
+{
+    // Let the caller configure Raylib's internal window stuff
+    let (mut raylib_handle, raylib_thread) = {
+        let mut builder = raylib::init();
+        config(&mut builder);
+        builder.build()
+    };
+
+    // Set some important settings on the window
+    raylib_handle.set_exit_key(None);
+    raylib_handle.set_target_fps(target_frames_per_second);
+
+    // Run the event loop
+    while !raylib_handle.window_should_close() {}
+}
diff --git a/game/game_logic/src/rendering/mod.rs b/game/game_logic/src/rendering/mod.rs
new file mode 100644
index 00000000..84cb5be0
--- /dev/null
+++ b/game/game_logic/src/rendering/mod.rs
@@ -0,0 +1,3 @@
+//! This module contains lower level rendering logic.
+
+pub mod event_loop;
\ No newline at end of file
diff --git a/game/game_logic/src/rendering/utilities/mod.rs b/game/game_logic/src/rendering/utilities/mod.rs
new file mode 100644
index 00000000..e69de29b