attempt to merge functionality

Cargo.lock

@@ -14,6 +14,14 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "component-macro"
+version = "0.1.0"
+dependencies = [
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -26,13 +34,32 @@ version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
+[[package]]
+name = "proc-macro2"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
+dependencies = [
+ "unicode-ident",
+]
+
 [[package]]
 name = "pvp-game-dilapidation"
 version = "0.1.0"
 dependencies = [
+ "component-macro",
  "sdl2",
 ]
 
+[[package]]
+name = "quote"
+version = "1.0.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "sdl2"
 version = "0.36.0"
@@ -56,6 +83,23 @@ dependencies = [
  "version-compare",
 ]
 
+[[package]]
+name = "syn"
+version = "2.0.58"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44cfb93f38070beee36b3fef7d4f5a16f27751d94b187b666a5cc5e9b0d30687"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+
 [[package]]
 name = "version-compare"
 version = "0.1.1"

Cargo.toml

@@ -7,3 +7,4 @@ edition = "2021"
 
 [dependencies]
 sdl2 = { version = "0.36.0", features = ["ttf", "image", "mixer"] }
+component-macro = { version = "0.1.0", path = "./component-macro" }

component-macro/src/lib.rs

@@ -22,5 +22,3 @@ fn impl_derive_macro(ast: &syn::DeriveInput) -> TokenStream {
     };
     gen.into()
 }
-
-

src/engine.rs

@@ -1,3 +1,5 @@
+use std::any::{Any, TypeId};
+use std::collections::HashMap;
 use std::time::Duration;
 
 use sdl2::{
@@ -42,40 +44,49 @@ impl_from_T_for_Error!(String, WindowBuildError, IntegerOrSdlError);
 
 pub struct Entity(u64);
 
-pub trait Component {}
-
-pub struct Sprite<'a> {
-    texture: Texture<'a>,
+pub trait Component {
+    fn inner_type_id(&self) -> TypeId;
+    fn as_any(&mut self) -> &mut dyn Any;
 }
 
-pub struct Context<'a> {
-    id_counter: &'a mut u64,
-    canvas: &'a mut Canvas<Window>,
-    texture_creator: &'a TextureCreator<WindowContext>,
-    entities: &'a mut Vec<Entity>,
-    components: &'a mut Vec<(u64, Box<dyn Component>)>,
-    systems: &'a mut Vec<Box<dyn System>>,
+pub struct Sprite {
+    path: std::path::PathBuf,
 }
 
-impl<'a> Context<'a> {
-    pub fn load_sprite<'b, P>(&self, path: P) -> Result<Sprite<'b>, Error>
+pub struct Context<'context, 'game>
+where
+    'game: 'context,
+{
+    id_counter: &'context mut u64,
+    canvas: &'context mut Canvas<Window>,
+    texture_creator: &'context TextureCreator<WindowContext>,
+    entities: &'context mut Vec<Entity>,
+    components: &'context mut Vec<(u64, Box<dyn Component>)>,
+    systems: &'context mut Vec<Box<dyn System>>,
+    textures: &'context mut HashMap<std::path::PathBuf, Texture<'game>>,
+}
+
+impl<'context, 'game> Context<'context, 'game> {
+    pub fn load_sprite<P>(&mut self, path: P) -> Result<Sprite, Error>
     where
-        'a: 'b,
         P: AsRef<std::path::Path>,
     {
-        let texture = self.texture_creator.load_texture(path)?;
-        Ok(Sprite { texture })
+        let path = path.as_ref().to_path_buf();
+        let texture: Texture<'game> = self.texture_creator.load_texture(&path)?;
+        self.textures.insert(path.clone(), texture);
+        Ok(Sprite { path })
     }
 
-    pub fn draw_sprite<'b>(&mut self, sprite: &Sprite<'b>, x: i32, y: i32) -> Result<(), Error> {
+    pub fn draw_sprite(&mut self, sprite: &Sprite, x: i32, y: i32) -> Result<(), Error> {
+        let texture = &self.textures[&sprite.path];
         self.canvas.copy(
-            &sprite.texture,
+            texture,
             None,
             Rect::new(
                 x * 4,
                 y * 4,
-                sprite.texture.query().width * 4,
-                sprite.texture.query().height * 4,
+                texture.query().width * 4,
+                texture.query().height * 4,
             ),
         )?;
         Ok(())
@@ -100,7 +111,7 @@ pub trait System {
     fn on_update(&self, _ctx: &mut Context) {}
 }
 
-pub struct Game {
+pub struct Game<'a> {
     id_counter: u64,
     sdl_context: Sdl,
     video_subsystem: VideoSubsystem,
@@ -111,9 +122,10 @@ pub struct Game {
     entities: Vec<Entity>,
     components: Vec<(u64, Box<dyn Component>)>,
     systems: Vec<Box<dyn System>>,
+    textures: HashMap<std::path::PathBuf, Texture<'a>>,
 }
 
-impl Game {
+impl<'game> Game<'game> {
     pub fn new() -> Result<Self, Error> {
         let sdl_context = sdl2::init()?;
         let video_subsystem = sdl_context.video()?;
@@ -141,31 +153,35 @@ impl Game {
             entities: vec![],
             components: vec![],
             systems: vec![],
+            textures: HashMap::new(),
         })
     }
 
-    pub fn run<F: Fn(&mut Context) -> ()>(mut self, f: F) {
-        'running: loop {
-            for event in self.event_pump.poll_iter() {
-                match event {
-                    Event::Quit { .. }
-                    | Event::KeyDown {
-                        keycode: Some(Keycode::Escape),
-                        ..
-                    } => break 'running,
-                    _ => {}
-                }
-            }
-            self.canvas.set_draw_color(Color::RGB(60, 180, 180));
-            self.canvas.clear();
-            f(&mut self.context());
-            self.canvas.present();
-        }
-        self.canvas.present();
-        std::thread::sleep(Duration::new(0, 1_000_000_000u32 / 60))
+    pub fn run<F: Fn(&mut Context) -> ()>(&mut self, _f: F) {
+        // 'running: loop {
+        //     for event in self.event_pump.poll_iter() {
+        //         match event {
+        //             Event::Quit { .. }
+        //             | Event::KeyDown {
+        //                 keycode: Some(Keycode::Escape),
+        //                 ..
+        //             } => break 'running,
+        //             _ => {}
+        //         }
+        //     }
+        //     self.canvas.set_draw_color(Color::RGB(60, 180, 180));
+        //     self.canvas.clear();
+        //     f(&mut self.context());
+        //     self.canvas.present();
+        // }
+        // self.canvas.present();
+        // std::thread::sleep(Duration::new(0, 1_000_000_000u32 / 60))
     }
 
-    pub fn context<'a>(&'a mut self) -> Context<'a> {
+    pub fn context<'context>(&'context mut self) -> Context<'context, 'game>
+    where
+        'game: 'context,
+    {
         Context {
             id_counter: &mut self.id_counter,
             canvas: &mut self.canvas,
@@ -173,6 +189,7 @@ impl Game {
             entities: &mut self.entities,
             components: &mut self.components,
             systems: &mut self.systems,
+            textures: &mut self.textures,
         }
     }
 }

src/main.rs

@@ -1,14 +1,16 @@
 #![allow(dead_code)]
+#![allow(unused_imports)]
 
+use component_macro::Component;
 use engine::{Component, Sprite, System};
+use std::any::{Any, TypeId};
 mod engine;
 
-struct Player<'a> {
-    sprite: Option<Sprite<'a>>,
+#[derive(Component)]
+struct Player {
+    sprite: Option<Sprite>,
 }
 
-impl<'a> Component for Player<'a> {}
-
 struct PlayerRenderer;
 
 impl System for PlayerRenderer {
@@ -17,15 +19,18 @@ impl System for PlayerRenderer {
     fn on_update(&self, _ctx: &mut engine::Context) {}
 }
 
-fn main() {
-    let mut game = engine::Game::new().unwrap();
-
-    {
+fn add_player<'borrow, 'game>(game: &'borrow mut engine::Game<'game>) {
     let mut context = game.context();
     context.add_system(Box::new(PlayerRenderer));
     context.spawn(vec![Box::new(Player { sprite: None })]);
 }
 
+fn main() {
+    let mut game = engine::Game::new().unwrap();
+    {
+        add_player(&mut game);
+    }
+
     game.run(|context| {
         let sprite = context.load_sprite("textures/player.png").unwrap();
         context.draw_sprite(&sprite, 16, 16).unwrap();

type-id-test-rs/Cargo.toml

@@ -1,4 +1,3 @@
-workspace = { members = ["component-macro"] }
 [package]
 name = "type-id-test-rs"
 version = "0.1.0"