Add FPS display, get webassembly build working

.gitignore

@@ -142,3 +142,7 @@ Cargo.lock
 
 # Ignore save game file
 savegame.json
+
+# Webassembly
+wasm/*.wasm
+wasm/*js

Cargo.toml

@@ -6,11 +6,17 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+default = ["rltk/opengl", "rltk/serde", "rltk/threaded"]
+curses = ["rltk/curses", "rltk/serde"]
+js = ["getrandom/js", "rltk/opengl", "rltk/serde"]
+
 [dependencies]
+getrandom = { version = "0.2.4" }
 lazy_static = "1.4.0"
 regex = "1.5.4"
-rltk = { version = "0.8.0", features=["serde"] }
-specs = { version = "0.16.1", features=["serde"] }
+rltk = { version = "0.8.1", default-features = false }
+specs = { version = "0.16.1", features = ["serde"] }
 specs-derive = "0.4.1"
-serde= { version="1.0.93", features = ["derive"] }
-serde_json = "1.0.39"
+serde = { version = "1.0.93", features = ["derive"] }
+serde_json = "1.0.44"

Makefile

@@ -6,6 +6,20 @@ run: $(call print-help, run, Runs the binary in develop mode)
 run-pi: $(call print-help, run-pi, Sets appropriate flags so that the game runs on a Raspberry Pi)
 	MESA_GL_VERSION_OVERRIDE=3.0 MESA_GLSL_VERSION_OVERRIDE=330 cargo run
 
+run-curses: $(call print-help, run-curses, Run the game in a console window via the curses library)
+	cargo run --features curses --no-default-features
+
+build:
+	cargo build
+
+build-wasm: $(call print-help, build-wasm, Build the webassembly version of the game)
+	cargo build --release --target wasm32-unknown-unknown --features js
+	wasm-bindgen target/wasm32-unknown-unknown/release/roguelike_tutorial.wasm --out-dir wasm --no-modules --no-typescript
+
+build-wasm-dev: $(call print-help, build-wasm-dev, Build the webassembly version of the game (dev version))
+	cargo build --target wasm32-unknown-unknown --features js
+	wasm-bindgen target/wasm32-unknown-unknown/debug/roguelike_tutorial.wasm --out-dir wasm --no-modules --no-typescript
+
 clean: $(call print-help, clean, Removes save file and compilation artifacts)
 	rm -f savegame.json
 	cargo clean
@@ -13,6 +27,9 @@ clean: $(call print-help, clean, Removes save file and compilation artifacts)
 check: $(call print-help, check, Check code syntax)
 	cargo check
 
+check-wasm: $(call print-help, check-wasm, Check code syntax for webassembly build)
+	cargo check --target wasm32-unknown-unknown --features js
+
 lint: $(call print-help, lint, Check code syntax and style)
 	cargo clippy
 
@@ -21,9 +38,9 @@ fmt: $(call print-help, fmt, Runs formatter on code)
 
 fix: $(call print-help, fix, Fixes some warnings, then runs the formatter)
 	cargo fix --allow-dirty --allow-staged
-	cargo +nightly fmt
+	make fmt
 
 docs: $(call print-help, docs, Generates code docs)
 	cargo doc
 
-.phony: run-pi clean check run fmt fix lint docs
+.phony: run-pi clean check run fmt fix lint docs build build-wasm check-wasm build-wasm-dev

src/main.rs

@@ -192,6 +192,7 @@ fn main() -> ::rltk::BError {
         .with_title("Roguelike Tutorial")
         .with_font("vga8x16.png", 8, 16)
         .with_sparse_console(80, 30, "vga8x16.png")
+        .with_vsync(false)
         .build()?;
 
     main_loop(context, init_state())

src/state.rs

@@ -13,6 +13,9 @@ use crate::{camera, colors, damage_system, gamelog, player, saveload_system, spa
 /// Whether to show a visual representation of map generation
 pub const SHOW_MAPGEN_VISUALIZER: bool = false;
 
+/// Whether to show an FPS counter
+pub const SHOW_FPS: bool = true;
+
 /// The main actions possible with a vendor
 #[derive(PartialEq, Copy, Clone)]
 pub enum VendorMode {
@@ -546,5 +549,8 @@ impl GameState for State {
 
         damage_system::delete_the_dead(&mut self.ecs);
         ::rltk::render_draw_buffer(ctx).expect("Failed to render the Rltk buffer");
+        if SHOW_FPS {
+            ctx.print(1, 59, &format!("FPS: {}", ctx.fps));
+        }
     }
 }

src/systems/dispatcher.rs

@@ -14,6 +14,12 @@ pub use single_thread::*;
 
 use super::*;
 
+#[cfg(not(target_arch = "wasm32"))]
+pub trait UnifiedDispatcher {
+    fn run_now(&mut self, ecs: &mut World);
+}
+
+#[cfg(target_arch = "wasm32")]
 pub trait UnifiedDispatcher {
     fn run_now(&mut self, ecs: *mut World);
 }

src/systems/dispatcher/multi_thread.rs

@@ -22,7 +22,7 @@ macro_rules! construct_dispatcher {
                 .build();
 
             let dispatch = MultiThreadedDispatcher {
-                dispatcher: dispatcher
+                dispatcher
             };
 
             return Box::new(dispatch);
@@ -35,10 +35,8 @@ pub struct MultiThreadedDispatcher {
 }
 
 impl<'a> UnifiedDispatcher for MultiThreadedDispatcher {
-    fn run_now(&mut self, ecs: *mut World) {
-        unsafe {
-            self.dispatcher.dispatch(&mut *ecs);
-            crate::effects::run_effects_queue(&mut *ecs);
-        }
+    fn run_now(&mut self, ecs: &mut World) {
+        self.dispatcher.dispatch(ecs);
+        crate::effects::run_effects_queue(ecs);
     }
 }

wasm/index.html

@@ -0,0 +1,16 @@
+<!doctype html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8" />
+        <title>Roguelike-game</title>
+    </head>
+    <body>
+        <canvas id="canvas" width="640" height="480"></canvas>
+        <script src="roguelike_tutorial.js"></script>
+        <script>
+            window.addEventListener('load', async () => {
+                await wasm_bindgen('roguelike_tutorial_bg.wasm');
+            });
+        </script>
+    </body>
+</html>