src/main.zig

@@ -30,12 +30,10 @@ const Player = struct {
 	move_y: ona.act.Axis = .{.keys = .{.w, .s}},
 };
 
-pub fn main() !void {
+pub const main = ona.start(setup, .{
-	try ona.start_app(setup, .{
+	.tick_rate = 60,
-		.tick_rate = 60,
+	.execution = .{.thread_share = 0.1},
-		.execution = .{.thread_share = 0.1},
+});
-	});
-}
 
 fn load(config: ona.Write(ona.gfx.Config), actors: ona.Write(Actors), assets: ona.Write(ona.gfx.Assets)) !void {
 	config.res.width, config.res.height = .{1280, 720};

src/ona/App.zig

@@ -1,25 +0,0 @@
-const coral = @import("coral");
-
-const flow = @import("flow");
-
-events: *const Events,
-target_frame_time: f64,
-elapsed_time: f64,
-is_running: bool,
-
-pub const Events = struct {
-	load: flow.World.Event,
-	pre_update: flow.World.Event,
-	update: flow.World.Event,
-	post_update: flow.World.Event,
-	render: flow.World.Event,
-	finish: flow.World.Event,
-	exit: flow.World.Event,
-};
-
-const Self = @This();
-
-pub fn quit(self: *Self) void {
-	self.is_running = false;
-}
-

src/ona/act.zig

@@ -1,17 +1,13 @@
-const App = @import("./App.zig");
-
 const coral = @import("coral");
 
 const flow = @import("flow");
 
-const gfx = @import("./gfx.zig");
+const ona = @import("./ona.zig");
-
-const msg = @import("./msg.zig");
 
 const std = @import("std");
 
 pub const Axis = struct {
-	keys: ?[2]gfx.Input.Key = null,
+	keys: ?[2]ona.gfx.Input.Key = null,
 };
 
 pub const Mapping = struct {
@@ -37,7 +33,7 @@ pub const Mapping = struct {
 	}
 };
 
-pub fn setup(world: *flow.World, events: App.Events) std.mem.Allocator.Error!void {
+pub fn setup(world: *flow.World, events: ona.App.Events) std.mem.Allocator.Error!void {
 	try world.set_state(Mapping{});
 
 	try world.on_event(events.pre_update, flow.system_fn(update), .{
@@ -45,7 +41,7 @@ pub fn setup(world: *flow.World, events: App.Events) std.mem.Allocator.Error!voi
 	});
 }
 
-pub fn update(inputs: msg.Receive(gfx.Input), mapping: flow.Write(Mapping)) void {
+pub fn update(inputs: ona.msg.Receive(ona.gfx.Input), mapping: flow.Write(Mapping)) void {
 	mapping.res.keys_pressed = Mapping.ScancodeSet.initEmpty();
 
 	for (inputs.messages()) |message| {

src/ona/gfx.zig

@@ -1,5 +1,3 @@
-const App = @import("./App.zig");
-
 pub const colors = @import("./gfx/colors.zig");
 
 const coral = @import("coral");
@@ -8,7 +6,7 @@ const ext = @import("./ext.zig");
 
 const flow = @import("flow");
 
-const msg = @import("./msg.zig");
+const ona = @import("./ona.zig");
 
 const rendering = @import("./gfx/rendering.zig");
 
@@ -437,7 +435,7 @@ fn load_bmp_texture(arena: *std.heap.ArenaAllocator, storage: coral.files.Storag
 	};
 }
 
-pub fn poll(app: flow.Write(App), inputs: msg.Send(Input)) !void {
+pub fn poll(app: flow.Write(ona.App), inputs: ona.msg.Send(Input)) !void {
 	var event = @as(ext.SDL_Event, undefined);
 
 	while (ext.SDL_PollEvent(&event) != 0) {
@@ -450,7 +448,7 @@ pub fn poll(app: flow.Write(App), inputs: msg.Send(Input)) !void {
 	}
 }
 
-pub fn setup(world: *flow.World, events: App.Events) (error {Unsupported} || std.Thread.SpawnError || std.mem.Allocator.Error)!void {
+pub fn setup(world: *flow.World, events: ona.App.Events) (error {Unsupported} || std.Thread.SpawnError || std.mem.Allocator.Error)!void {
 	if (ext.SDL_Init(ext.SDL_INIT_VIDEO) != 0) {
 		return error.Unsupported;
 	}

src/ona/gfx/spirv.zig

@@ -4,6 +4,8 @@ const ext = @cImport({
 	@cInclude("spirv-cross/spirv_cross_c.h");
 });
 
+const ona = @import("../ona.zig");
+
 const std = @import("std");
 
 pub const Error = std.mem.Allocator.Error || error {
@@ -283,7 +285,9 @@ pub fn analyze(arena: *std.heap.ArenaAllocator, options: Options) Error!Program
 			try stage.reflect_images_samplers(arena, compiler, resources);
 			try stage.reflect_uniform_blocks(arena, compiler, resources);
 
-			std.log.info("{s}", .{stage.source});
+			if (ona.launch_arg(.dump_shader_translations) != null) {
+				std.log.info("Vertex translated:\n{s}", .{stage.source});
+			}
 
 			break: vertex_stage stage;
 		},
@@ -307,7 +311,9 @@ pub fn analyze(arena: *std.heap.ArenaAllocator, options: Options) Error!Program
 			try stage.reflect_images_samplers(arena, compiler, resources);
 			try stage.reflect_uniform_blocks(arena, compiler, resources);
 
-			std.log.info("{s}", .{stage.source});
+			if (ona.launch_arg(.dump_shader_translations) != null) {
+				std.log.info("Fragment translated:\n{s}", .{stage.source});
+			}
 
 			break: fragment_stage stage;
 		},

src/ona/msg.zig

@@ -1,9 +1,9 @@
-const App = @import("./App.zig");
-
 const coral = @import("coral");
 
 const flow = @import("flow");
 
+const ona = @import("./ona.zig");
+
 const std = @import("std");
 
 fn Channel(comptime Message: type) type {
@@ -106,7 +106,7 @@ pub fn Send(comptime Message: type) type {
 				.channel = (try context.register_writable_state_access(TypedChannel)) orelse set: {
 					try context.world.set_state(TypedChannel.init(coral.heap.allocator));
 
-					const app = context.world.get_state(App).?;
+					const app = context.world.get_state(ona.App).?;
 
 					try context.world.on_event(app.events.post_update, flow.system_fn(TypedChannel.swap), .{
 						.label = "swap channel of " ++ @typeName(Message),

src/ona/ona.zig

@@ -1,5 +1,3 @@
-pub const App = @import("./App.zig");
-
 pub const act = @import("./act.zig");
 
 const coral = @import("coral");
@@ -14,6 +12,35 @@ pub const msg = @import("./msg.zig");
 
 const std = @import("std");
 
+pub const App = struct {
+	events: *const Events,
+	target_frame_time: f64,
+	elapsed_time: f64,
+	is_running: bool,
+
+	pub const Events = struct {
+		load: flow.World.Event,
+		pre_update: flow.World.Event,
+		update: flow.World.Event,
+		post_update: flow.World.Event,
+		render: flow.World.Event,
+		finish: flow.World.Event,
+		exit: flow.World.Event,
+	};
+
+	pub fn quit(self: *App) void {
+		self.is_running = false;
+	}
+};
+
+pub const Flag = enum {
+	dump_shader_translations,
+
+	var launch_args = [_]?[]const u8{null} ** std.enums.values(Flag).len;
+
+	const values = std.enums.values(Flag);
+};
+
 pub const Options = struct {
 	tick_rate: u64,
 	execution: Execution,
@@ -38,79 +65,111 @@ pub const default_middlewares = &.{
 	act.setup,
 };
 
-pub fn start_app(setup: Setup, options: Options) anyerror!void {
+pub fn launch_arg(flag: Flag) ?[]const u8 {
-	defer {
+	return Flag.launch_args[@intFromEnum(flag)];
-		coral.heap.trace_leaks();
+}
-		ext.SDL_Quit();
-	}
 
-	var world = try switch (options.execution) {
+pub fn start(comptime setup: Setup, options: Options) fn () anyerror!void {
-		.single_threaded => flow.World.init(0),
+	const Start = struct {
+		fn main() anyerror!void {
+			defer {
+				coral.heap.trace_leaks();
+				ext.SDL_Quit();
+			}
 
-		.thread_share => |thread_share| init: {
+			parse_args: for (std.os.argv[1 ..]) |arg| {
-			const cpu_count = @as(u32, @intCast(std.math.clamp(std.Thread.getCpuCount() catch |cpu_count_error| {
+				const arg_span = std.mem.span(arg);
-				@panic(switch (cpu_count_error) {
+				const arg_split_index = std.mem.indexOfScalar(u8, arg_span, '=') orelse arg_span.len;
-					error.PermissionDenied => "permission denied retrieving CPU count",
+				const arg_name = arg_span[0 .. arg_split_index];
-					error.SystemResources => "system resources are preventing retrieval of the CPU count",
-    				error.Unexpected => "unexpected failure retrieving CPU count",
-				});
-			}, 0, std.math.maxInt(u32))));
 
-			break: init flow.World.init(coral.scalars.fractional(cpu_count, thread_share) orelse 0);
+				for (Flag.values) |value| {
-		},
+					const name = @tagName(value);
-	};
 
-	defer world.deinit();
+					if (!std.mem.eql(u8, arg_name, name)) {
+						continue;
+					}
 
-	const events = App.Events{
+					Flag.launch_args[@intFromEnum(value)] =
-		.load = try world.create_event("load"),
+						if (arg_split_index == arg_span.len)
-		.pre_update = try world.create_event("pre-update"),
+							name
-		.update = try world.create_event("update"),
+						else
-		.post_update = try world.create_event("post-update"),
+							arg_span[arg_split_index ..];
-		.render = try world.create_event("render"),
-		.finish = try world.create_event("finish"),
-		.exit = try world.create_event("exit"),
-	};
 
-	const app = try world.set_get_state(App{
+					continue: parse_args;
-		.events = &events,
+				}
-		.target_frame_time = 1.0 / @as(f64, @floatFromInt(options.tick_rate)),
+			}
-		.elapsed_time = 0,
-		.is_running = true,
-	});
 
-	for (options.middlewares) |setup_middleware| {
+			var world = try switch (options.execution) {
-		try setup_middleware(&world, events);
+				.single_threaded => flow.World.init(0),
-	}
 
-	try setup(&world, events);
+				.thread_share => |thread_share| init: {
-	try world.run_event(events.load);
+					const cpu_count = @as(u32, @intCast(std.math.clamp(std.Thread.getCpuCount() catch |cpu_count_error| {
+						@panic(switch (cpu_count_error) {
+							error.PermissionDenied => "permission denied retrieving CPU count",
+							error.SystemResources => "system resources are preventing retrieval of the CPU count",
+							error.Unexpected => "unexpected failure retrieving CPU count",
+						});
+					}, 0, std.math.maxInt(u32))));
 
-	const ticks_initial = std.time.milliTimestamp();
+					break: init flow.World.init(coral.scalars.fractional(cpu_count, thread_share) orelse 0);
-	var ticks_previous = ticks_initial;
+				},
-	var accumulated_time = @as(f64, 0);
+			};
 
-	while (app.is_running) {
+			defer world.deinit();
-		const ticks_current = std.time.milliTimestamp();
-		const milliseconds_per_second = 1000.0;
-		const delta_time = @as(f64, @floatFromInt(ticks_current - ticks_previous)) / milliseconds_per_second;
 
-		app.elapsed_time = @as(f64, @floatFromInt(ticks_current - ticks_initial)) / milliseconds_per_second;
+			const events = App.Events{
-		ticks_previous = ticks_current;
+				.load = try world.create_event("load"),
-		accumulated_time += delta_time;
+				.pre_update = try world.create_event("pre-update"),
+				.update = try world.create_event("update"),
+				.post_update = try world.create_event("post-update"),
+				.render = try world.create_event("render"),
+				.finish = try world.create_event("finish"),
+				.exit = try world.create_event("exit"),
+			};
 
-		try world.run_event(events.pre_update);
+			const app = try world.set_get_state(App{
+				.events = &events,
+				.target_frame_time = 1.0 / @as(f64, @floatFromInt(options.tick_rate)),
+				.elapsed_time = 0,
+				.is_running = true,
+			});
 
-		while (accumulated_time >= app.target_frame_time) : (accumulated_time -= app.target_frame_time) {
+			for (options.middlewares) |setup_middleware| {
-			try world.run_event(events.update);
+				try setup_middleware(&world, events);
+			}
+
+			try setup(&world, events);
+			try world.run_event(events.load);
+
+			const ticks_initial = std.time.milliTimestamp();
+			var ticks_previous = ticks_initial;
+			var accumulated_time = @as(f64, 0);
+
+			while (app.is_running) {
+				const ticks_current = std.time.milliTimestamp();
+				const milliseconds_per_second = 1000.0;
+				const delta_time = @as(f64, @floatFromInt(ticks_current - ticks_previous)) / milliseconds_per_second;
+
+				app.elapsed_time = @as(f64, @floatFromInt(ticks_current - ticks_initial)) / milliseconds_per_second;
+				ticks_previous = ticks_current;
+				accumulated_time += delta_time;
+
+				try world.run_event(events.pre_update);
+
+				while (accumulated_time >= app.target_frame_time) : (accumulated_time -= app.target_frame_time) {
+					try world.run_event(events.update);
+				}
+
+				try world.run_event(events.post_update);
+				try world.run_event(events.render);
+				try world.run_event(events.finish);
+			}
+
+			try world.run_event(events.exit);
 		}
+	};
 
-		try world.run_event(events.post_update);
+	return Start.main;
-		try world.run_event(events.render);
-		try world.run_event(events.finish);
-	}
-
-	try world.run_event(events.exit);
 }
 
 pub const system_fn = flow.system_fn;