Refactored OpaquePtr/Scene slightly.

Removed unused allegro.path.

.gitignore

@@ -1,5 +1,4 @@
 .vscode
 zig-cache
 zig-out
-allegro.path
 **/*~

README.md

@@ -4,7 +4,7 @@
 
 **Attention**: make sure the working directory contains the `src/assets/...` directory otherwise the application will crash (reporting a "FailedToLoadBitmap" error).
 
-If you unzip the binaries package or build from sources this means that the root of the zip/sources is your working directory and you're executing `./zig-out/bin/tins2023` or `.\zig-out\bin\tins2023.exe`.
+If you unzip the binaries package or build from sources this means that the root of the zip/sources is your working directory and you're executing `./zig-out/bin/jungle_tale` or `.\zig-out\bin\jungle_tale.exe`.
 
 # Rules
 
@@ -50,13 +50,13 @@ For building you need:
 - A recent (0.11.0-dev) Zig compiler.
 - Allegro 5.2.8 development libraries.
 
-You can use `allegro.path` if your Allegro development libraries can't be natively found. In this file you can put the path to a directory that contains the Allegro `lib`, `bin` and `include` folders.
+You can use `allegro-dir` build option if your Allegro development libraries can't be natively found. In this file you can put the path to a directory that contains the Allegro `lib`, `bin` and `include` folders.
 
 Build:
 `zig build`
 
 And run (after building):
-`./zig-out/bin/tins2023`
+`./zig-out/bin/jungle_tale`
 
 Build & run automatically:
 `zig build run`

allegro/.gitignore

@@ -0,0 +1,4 @@
+.vscode
+zig-cache
+zig-out
+**/*~

allegro/build.zig

@@ -8,17 +8,88 @@ const cwd = std.fs.path.dirname(current_file()).?;
 const path_separator = std.fs.path.sep_str;
 
 /// add this package to exe
-pub fn addTo(comptime allegro_dir: []const u8, exe: *std.build.LibExeObjStep) void {
-    exe.addAnonymousModule("allegro", .{ .source_file = .{ .path = cwd ++ path_separator ++ "allegro.zig" } });
-    if (allegro_dir.len > 0) {
-        exe.addIncludePath(allegro_dir ++ path_separator ++ "include");
-        exe.addLibraryPath(allegro_dir ++ path_separator ++ "lib");
-    }
-    exe.linkLibC();
-
-    exe.linkSystemLibrary("allegro");
-    exe.linkSystemLibrary("allegro_font");
-    exe.linkSystemLibrary("allegro_image");
-    exe.linkSystemLibrary("allegro_memfile");
-    exe.linkSystemLibrary("allegro_ttf");
+pub fn addModule(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode) void {
+    // _ = b.addStaticLibrary(.{
+    //     .name = "allegro",
+    //     .root_source_file = .{ .path = cwd ++ path_separator ++ "allegro.zig" },
+    //     .target = target,
+    //     .optimize = optimize,
+    // });
+    _ = b.addModule("allegro", .{
+        .root_source_file = .{ .path = cwd ++ path_separator ++ "allegro.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
+}
+
+pub fn build(b: *std.Build) !void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    const static = false;
+
+    // Expose this as a module that others can import
+    var module = b.addModule("allegro", .{
+        .root_source_file = .{ .path = "src/allegro.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const allegro_dir = b.option([]const u8, "allegro-dir", "path to a directory that contains the Allegro `lib`, `bin` and `include` folders") orelse "";
+    if (allegro_dir.len != 0) {
+        module.addIncludePath(.{ .path = b.pathJoin(&[_][]const u8{ allegro_dir, "include" }) });
+        module.addLibraryPath(.{ .path = b.pathJoin(&[_][]const u8{ allegro_dir, "lib" }) });
+    }
+
+    module.link_libc = true;
+
+    if (static) {
+        module.linkSystemLibrary("allegro-static", .{});
+        module.linkSystemLibrary("allegro_font-static", .{});
+        module.linkSystemLibrary("allegro_image-static", .{});
+        module.linkSystemLibrary("allegro_memfile-static", .{});
+        module.linkSystemLibrary("allegro_ttf-static", .{});
+        module.linkSystemLibrary("dumb", .{});
+        module.linkSystemLibrary("FLAC", .{});
+        module.linkSystemLibrary("freetype", .{});
+        module.linkSystemLibrary("jpeg", .{});
+        module.linkSystemLibrary("ogg", .{});
+        module.linkSystemLibrary("opus", .{});
+        module.linkSystemLibrary("opusfile", .{});
+        module.linkSystemLibrary("physfs", .{});
+        module.linkSystemLibrary("png16", .{});
+        // module.linkSystemLibrary("theoradec", .{});
+        module.linkSystemLibrary("vorbis", .{});
+        module.linkSystemLibrary("vorbisfile", .{});
+        module.linkSystemLibrary("webp", .{});
+        module.linkSystemLibrary("webpdecoder", .{});
+        module.linkSystemLibrary("webpdemux", .{});
+        module.linkSystemLibrary("zlib", .{});
+        module.linkSystemLibrary("opengl32", .{});
+        // module.linkSystemLibrary("", .{});
+        // module.linkSystemLibrary("", .{});
+        // module.linkSystemLibrary("", .{});
+        // module.linkSystemLibrary("", .{});
+        // module.linkSystemLibrary("", .{});
+        if (target.result.os.tag == .windows) {
+            module.linkSystemLibrary("gdi32", .{});
+            module.linkSystemLibrary("ole32", .{});
+            module.linkSystemLibrary("shlwapi", .{});
+            module.linkSystemLibrary("winmm", .{});
+            // module.linkSystemLibrary("", .{});
+            // module.linkSystemLibrary("", .{});
+            // module.linkSystemLibrary("", .{});
+            // module.linkSystemLibrary("", .{});
+            // module.linkSystemLibrary("", .{});
+            if (target.result.isGnu()) {
+                // module.linkSystemLibrary("stdc++", .{});
+            }
+        }
+    } else {
+        module.linkSystemLibrary("allegro.dll", .{});
+        module.linkSystemLibrary("allegro_font.dll", .{});
+        module.linkSystemLibrary("allegro_image.dll", .{});
+        module.linkSystemLibrary("allegro_memfile.dll", .{});
+        module.linkSystemLibrary("allegro_ttf.dll", .{});
+    }
 }

allegro/build.zig.zon

@@ -0,0 +1,9 @@
+.{
+    .name = "allegro",
+    .version = "0.1.0",
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+    },
+}

allegro/src/allegro.zig

@@ -14,22 +14,22 @@ pub const Bitmap = struct {
     }
 
     pub fn drawCentered(self: Bitmap, x: f32, y: f32) void {
-        self.draw(x - 0.5 * @intToFloat(f32, self.width()), y - 0.5 * @intToFloat(f32, self.height()), DrawFlags{});
+        self.draw(x - 0.5 * self.widthF(), y - 0.5 * self.heightF(), DrawFlags{});
     }
 
     pub fn drawCenteredScaledUniform(self: Bitmap, x: f32, y: f32, s: f32) void {
-        const w = s * @intToFloat(f32, self.width());
-        const h = s * @intToFloat(f32, self.height());
+        const w = s * self.widthF();
+        const h = s * self.heightF();
         self.drawScaled(x - 0.5 * w, y - 0.5 * h, w, h);
     }
 
     pub fn drawScaled(self: Bitmap, x: f32, y: f32, w: f32, h: f32) void {
-        drawScaledBitmap(self, 0, 0, @intToFloat(f32, self.width()), @intToFloat(f32, self.height()), x, y, w, h, DrawFlags{});
+        drawScaledBitmap(self, 0, 0, self.widthF(), self.heightF(), x, y, w, h, DrawFlags{});
     }
 
     pub fn drawScaledUniform(self: Bitmap, x: f32, y: f32, s: f32) void {
-        const sourceW = @intToFloat(f32, self.width());
-        const sourceH = @intToFloat(f32, self.height());
+        const sourceW = self.widthF();
+        const sourceH = self.heightF();
         const scaledW = s * sourceW;
         const scaledH = s * sourceH;
         drawScaledBitmap(self, 0, 0, sourceW, sourceH, x, y, scaledW, scaledH, DrawFlags{});
@@ -40,22 +40,22 @@ pub const Bitmap = struct {
     }
 
     pub fn drawTintedCentered(self: Bitmap, tint: Color, x: f32, y: f32) void {
-        self.drawTinted(tint, x - 0.5 * @intToFloat(f32, self.width()), y - 0.5 * @intToFloat(f32, self.height()), DrawFlags{});
+        self.drawTinted(tint, x - 0.5 * self.widthF(), y - 0.5 * self.heightF(), DrawFlags{});
     }
 
     pub fn drawTintedCenteredScaled(self: Bitmap, tint: Color, x: f32, y: f32, s: f32) void {
-        const w = s * @intToFloat(f32, self.width());
-        const h = s * @intToFloat(f32, self.height());
+        const w = s * self.widthF();
+        const h = s * self.heightF();
         self.drawTintedScaled(tint, x - 0.5 * w, y - 0.5 * h, w, h);
     }
 
     pub fn drawTintedScaled(self: Bitmap, tint: Color, x: f32, y: f32, w: f32, h: f32) void {
-        drawTintedScaledBitmap(self, tint, 0, 0, @intToFloat(f32, self.width()), @intToFloat(f32, self.height()), x, y, w, h, DrawFlags{});
+        drawTintedScaledBitmap(self, tint, 0, 0, self.widthF(), self.heightF(), x, y, w, h, DrawFlags{});
     }
 
     pub fn drawTintedScaledUniform(self: Bitmap, tint: Color, x: f32, y: f32, s: f32) void {
-        const sourceW = @intToFloat(f32, self.width());
-        const sourceH = @intToFloat(f32, self.height());
+        const sourceW = self.widthF();
+        const sourceH = self.heightF();
         const scaledW = s * sourceW;
         const scaledH = s * sourceH;
         drawTintedScaledBitmap(self, tint, 0, 0, sourceW, sourceH, x, y, scaledW, scaledH, DrawFlags{});
@@ -65,6 +65,10 @@ pub const Bitmap = struct {
         return getBitmapHeight(self);
     }
 
+    pub fn heightF(self: Bitmap) f32 {
+        return @as(f32, @floatFromInt(self.height()));
+    }
+
     pub fn sub(self: Bitmap, x: i32, y: i32, w: i32, h: i32) !Bitmap {
         return createSubBitmap(self, x, y, w, h);
     }
@@ -72,6 +76,10 @@ pub const Bitmap = struct {
     pub fn width(self: Bitmap) i32 {
         return getBitmapWidth(self);
     }
+
+    pub fn widthF(self: Bitmap) f32 {
+        return @as(f32, @floatFromInt(self.width()));
+    }
 };
 
 pub const Color = struct {
@@ -79,9 +87,9 @@ pub const Color = struct {
 
     fn hexToU4(hex: u8) u4 {
         return switch (hex) {
-            '0'...'9' => @intCast(u4, hex - '0'),
-            'a'...'f' => @intCast(u4, hex - 'a') + 10,
-            'A'...'F' => @intCast(u4, hex - 'A') + 10,
+            '0'...'9' => @as(u4, @intCast(hex - '0')),
+            'a'...'f' => @as(u4, @intCast(hex - 'a')) + 10,
+            'A'...'F' => @as(u4, @intCast(hex - 'A')) + 10,
             else => unreachable,
         };
     }
@@ -93,13 +101,13 @@ pub const Color = struct {
 
         if (hex.len < left + 6) unreachable;
 
-        const r = (@intCast(u8, hexToU4(hex[left])) << 4) + @intCast(u8, hexToU4(hex[left + 1]));
-        const g = (@intCast(u8, hexToU4(hex[left + 2])) << 4) + @intCast(u8, hexToU4(hex[left + 3]));
-        const b = (@intCast(u8, hexToU4(hex[left + 4])) << 4) + @intCast(u8, hexToU4(hex[left + 5]));
+        const r = (@as(u8, @intCast(hexToU4(hex[left]))) << 4) + @as(u8, @intCast(hexToU4(hex[left + 1])));
+        const g = (@as(u8, @intCast(hexToU4(hex[left + 2]))) << 4) + @as(u8, @intCast(hexToU4(hex[left + 3])));
+        const b = (@as(u8, @intCast(hexToU4(hex[left + 4]))) << 4) + @as(u8, @intCast(hexToU4(hex[left + 5])));
         if (hex.len < left + 8) {
             return mapRgb(r, g, b);
         }
-        const a = (@intCast(u8, hexToU4(hex[left + 6])) << 4) + @intCast(u8, hexToU4(hex[left + 7]));
+        const a = (@as(u8, @intCast(hexToU4(hex[left + 6]))) << 4) + @as(u8, @intCast(hexToU4(hex[left + 7])));
         return mapRgba(r, g, b, a);
     }
 };
@@ -119,9 +127,21 @@ pub const Display = struct {
         return getDisplayHeight(self);
     }
 
+    pub fn heightF(self: Display) f32 {
+        return @as(f32, @floatFromInt(self.height()));
+    }
+
+    pub fn setTitle(self: Display, title: []const u8) void {
+        setWindowTitle(self, title);
+    }
+
     pub fn width(self: Display) i32 {
         return getDisplayWidth(self);
     }
+
+    pub fn widthF(self: Display) f32 {
+        return @as(f32, @floatFromInt(self.width()));
+    }
 };
 
 pub const DrawFlags = packed struct(c_int) {
@@ -453,23 +473,23 @@ pub fn destroyTimer(timer: Timer) void {
 }
 
 pub fn drawBitmap(bitmap: Bitmap, dx: f32, dy: f32, flags: DrawFlags) void {
-    c.al_draw_bitmap(bitmap.native, dx, dy, @bitCast(c_int, flags));
+    c.al_draw_bitmap(bitmap.native, dx, dy, @as(c_int, @bitCast(flags)));
 }
 
 pub fn drawScaledBitmap(bitmap: Bitmap, sx: f32, sy: f32, sw: f32, sh: f32, dx: f32, dy: f32, dw: f32, dh: f32, flags: DrawFlags) void {
-    c.al_draw_scaled_bitmap(bitmap.native, sx, sy, sw, sh, dx, dy, dw, dh, @bitCast(c_int, flags));
+    c.al_draw_scaled_bitmap(bitmap.native, sx, sy, sw, sh, dx, dy, dw, dh, @as(c_int, @bitCast(flags)));
 }
 
 pub fn drawText(font: Font, color: Color, x: f32, y: f32, flags: DrawTextFlags, text: [*:0]const u8) void {
-    c.al_draw_text(font.native, color.native, x, y, @enumToInt(flags), text);
+    c.al_draw_text(font.native, color.native, x, y, @intFromEnum(flags), text);
 }
 
 pub fn drawTintedBitmap(bitmap: Bitmap, tint: Color, dx: f32, dy: f32, flags: DrawFlags) void {
-    c.al_draw_tinted_bitmap(bitmap.native, tint.native, dx, dy, @bitCast(c_int, flags));
+    c.al_draw_tinted_bitmap(bitmap.native, tint.native, dx, dy, @as(c_int, @bitCast(flags)));
 }
 
 pub fn drawTintedScaledBitmap(bitmap: Bitmap, tint: Color, sx: f32, sy: f32, sw: f32, sh: f32, dx: f32, dy: f32, dw: f32, dh: f32, flags: DrawFlags) void {
-    c.al_draw_tinted_scaled_bitmap(bitmap.native, tint.native, sx, sy, sw, sh, dx, dy, dw, dh, @bitCast(c_int, flags));
+    c.al_draw_tinted_scaled_bitmap(bitmap.native, tint.native, sx, sy, sw, sh, dx, dy, dw, dh, @as(c_int, @bitCast(flags)));
 }
 
 pub fn dropNextEvent(queue: EventQueue) bool {
@@ -521,7 +541,7 @@ pub fn getDisplayEventSource(display: Display) EventSource {
 }
 
 pub fn getDisplayFlags(display: Display) NewDisplayFlags {
-    return @bitCast(NewDisplayFlags, c.al_get_display_flags(display.native));
+    return @as(NewDisplayFlags, @bitCast(c.al_get_display_flags(display.native)));
 }
 
 pub fn getDisplayHeight(display: Display) i32 {
@@ -553,7 +573,7 @@ pub fn getNewBitmapFlags() NewBitmapFlags {
 }
 
 pub fn getNewDisplayOption(option: NewDisplayOption, importance: *OptionImportance) c_int {
-    return c.al_get_new_display_option(@enumToInt(option), @ptrCast(*c_int, importance));
+    return c.al_get_new_display_option(@intFromEnum(option), @as(*c_int, @ptrCast(importance)));
 }
 
 pub fn getNewBitmapFormat() PixelFormat {
@@ -641,7 +661,7 @@ pub fn loadFont(path: [*:0]const u8, size: i32, flags: c_int) !Font {
 }
 
 pub fn loadTtfFont(path: [*:0]const u8, size: i32, flags: LoadTtfFontFlags) !Font {
-    const font = c.al_load_ttf_font(path, size, @bitCast(c_int, flags));
+    const font = c.al_load_ttf_font(path, size, @as(c_int, @bitCast(flags)));
     if (font) |native| {
         return Font{ .native = native };
     }
@@ -665,7 +685,7 @@ pub fn mapRgbF(r: f32, g: f32, b: f32) Color {
 }
 
 pub fn openMemfile(data: []u8, mode: []const u8) !File {
-    const file = c.al_open_memfile(&data[0], @intCast(i64, data.len), &mode[0]);
+    const file = c.al_open_memfile(&data[0], @as(i64, @intCast(data.len)), &mode[0]);
     if (file) |native| {
         return File{ .native = native };
     }
@@ -689,11 +709,11 @@ pub fn saveBitmapF(file: File, ident: []const u8, bitmap: Bitmap) bool {
 }
 
 pub fn setDisplayFlag(display: Display, flag: NewDisplayFlags, on: bool) bool {
-    return c.al_set_display_flag(display.native, @bitCast(c_int, flag), on);
+    return c.al_set_display_flag(display.native, @as(c_int, @bitCast(flag)), on);
 }
 
 pub fn setNewBitmapFlags(flags: NewBitmapFlags) void {
-    c.al_set_new_bitmap_flags(@bitCast(c_int, flags));
+    c.al_set_new_bitmap_flags(@as(c_int, @bitCast(flags)));
 }
 
 pub fn setNewBitmapFormat(format: PixelFormat) void {
@@ -701,11 +721,15 @@ pub fn setNewBitmapFormat(format: PixelFormat) void {
 }
 
 pub fn setNewDisplayFlags(flags: NewDisplayFlags) void {
-    c.al_set_new_display_flags(@bitCast(c_int, flags));
+    c.al_set_new_display_flags(@as(c_int, @bitCast(flags)));
 }
 
 pub fn setNewDisplayOption(option: NewDisplayOption, value: i32, importance: OptionImportance) void {
-    c.al_set_new_display_option(@enumToInt(option), value, @enumToInt(importance));
+    c.al_set_new_display_option(@intFromEnum(option), value, @intFromEnum(importance));
+}
+
+pub fn setNewWindowTitle(title: []const u8) void {
+    c.al_set_new_window_title(&title[0]);
 }
 
 pub fn setTargetBitmap(bitmap: Bitmap) void {
@@ -716,6 +740,10 @@ pub fn setTargetBackbuffer(display: Display) void {
     c.al_set_target_bitmap(display.native);
 }
 
+pub fn setWindowTitle(display: Display, title: []const u8) void {
+    c.al_set_window_title(display.native, &title[0]);
+}
+
 pub fn startTimer(timer: Timer) void {
     c.al_start_timer(timer.native);
 }

build.zig

@@ -1,7 +1,4 @@
 const std = @import("std");
-const allegro = @import("allegro/build.zig");
-
-const allegroPath = @embedFile("allegro.path");
 
 // Although this function looks imperative, note that its job is to
 // declaratively construct a build graph that will be executed by an external
@@ -19,7 +16,7 @@ pub fn build(b: *std.Build) void {
     const optimize = b.standardOptimizeOption(.{});
 
     const exe = b.addExecutable(.{
-        .name = "tins2023",
+        .name = "jungle_tale",
         // In this case the main source file is merely a path, however, in more
         // complicated build scripts, this could be a generated file.
         .root_source_file = .{ .path = "src/main.zig" },
@@ -27,8 +24,6 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    allegro.addTo(allegroPath, exe);
-
     // This declares intent for the executable to be installed into the
     // standard location when the user invokes the "install" step (the default
     // step when running `zig build`).
@@ -45,6 +40,18 @@ pub fn build(b: *std.Build) void {
     // files, this ensures they will be present and in the expected location.
     run_cmd.step.dependOn(b.getInstallStep());
 
+    const allegro_dep = b.dependency("allegro", .{
+        .target = target,
+        .optimize = optimize,
+    });
+    const allegro_mod = allegro_dep.module("allegro");
+    const allegro_dir = b.option([]const u8, "allegro-dir", "path to a directory that contains the Allegro `lib`, `bin` and `include` folders") orelse "";
+    if (allegro_dir.len != 0) {
+        allegro_mod.addIncludePath(.{ .path = b.pathJoin(&[_][]const u8{ allegro_dir, "include" }) });
+        allegro_mod.addLibraryPath(.{ .path = b.pathJoin(&[_][]const u8{ allegro_dir, "lib" }) });
+    }
+    exe.root_module.addImport("allegro", allegro_mod);
+
     // This allows the user to pass arguments to the application in the build
     // command itself, like this: `zig build run -- arg1 arg2 etc`
     if (b.args) |args| {

build.zig.zon

@@ -0,0 +1,15 @@
+.{
+    .name = "tins2023",
+    .version = "0.1.0",
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "README.md",
+        "src",
+    },
+    .dependencies = .{
+        .allegro = .{
+            .path = "allegro",
+        },
+    },
+}

src/context.zig

@@ -1,7 +1,6 @@
 const std = @import("std");
 const allegro = @import("allegro");
 const engine = @import("engine.zig");
-const paths = @import("paths.zig");
 const Palette = @import("palette.zig").Palette;
 const Scene = @import("scene.zig").Scene;
 const Renderer = @import("renderer.zig").Renderer;
@@ -50,6 +49,7 @@ pub const Context = struct {
         // allegro.setNewDisplayOption(allegro.NewDisplayOption.SAMPLE_BUFFERS, 1, allegro.OptionImportance.REQUIRE);
         // allegro.setNewDisplayOption(allegro.NewDisplayOption.SAMPLES, 4, allegro.OptionImportance.REQUIRE);
         allegro.setNewDisplayFlags(allegro.NewDisplayFlags{ .RESIZABLE = true });
+        allegro.setNewWindowTitle("Jungle Tale");
         const display = try allegro.createDisplay(DefaultDisplayWidth, DefaultDisplayHeight);
 
         events.registerDisplay(display);
@@ -65,6 +65,13 @@ pub const Context = struct {
         };
     }
 
+    pub fn enterScene(self: *Context, scene: Scene) void {
+        self.exitScene();
+
+        self.scene = scene;
+        scene.enter(self);
+    }
+
     fn exitScene(self: *Context) void {
         if (self.scene) |scene| {
             scene.exit(self);
@@ -79,25 +86,12 @@ pub const Context = struct {
         self.events.destroy();
     }
 
-    pub fn registerFonts(self: *Context) !void {
-        const viewport = self.renderer.viewport;
-        const fonts = &self.renderer.fonts;
-        try fonts.addFromFileTTF("default", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(32));
-        try fonts.addFromFileTTF("small", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(16));
-        try fonts.addFromFileTTF("extra-small", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(12));
-        try fonts.addFromFileTTF("large", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(64));
-        try fonts.addFromFileTTF("debug", paths.AssetsDir ++ "/fonts/Cabin-Regular.ttf", viewport.scaledInteger(16));
-    }
-
     pub fn quit(self: *Context) void {
         self.shouldQuit = true;
     }
 
-    pub fn switchToScene(self: *Context, comptime SceneType: type, build: ?*const fn (*SceneType) void) !void {
-        self.exitScene();
-
-        const scene = try Scene.init(SceneType, self.allocator, build);
-        self.scene = scene;
-        scene.enter(self);
+    pub fn switchToScene(self: *Context, comptime SceneType: type) !void {
+        const scene = try Scene.init(SceneType, self.allocator);
+        self.enterScene(scene);
     }
 };

src/engine/assets.zig

@@ -109,13 +109,13 @@ pub const Sprite = struct {
 
         const horizontal = @divTrunc(bitmapWidth, width);
         const vertical = @divTrunc(bitmapHeight, height);
-        const n = @intCast(usize, horizontal * vertical);
+        const n = @as(usize, @intCast(horizontal * vertical));
         const frames = try allocator.alloc(allegro.Bitmap, n);
         var i: i32 = 0;
         while (i < n) : (i += 1) {
             const left = @mod(i, horizontal) * width;
             const top = @divTrunc(i, horizontal) * height;
-            frames[@intCast(usize, i)] = try bitmap.sub(left, top, width, height);
+            frames[@as(usize, @intCast(i))] = try bitmap.sub(left, top, width, height);
         }
 
         return Sprite{

src/engine/fps.zig

@@ -22,6 +22,6 @@ pub const FPS = struct {
     pub fn fps(self: FPS) usize {
         if (self.framesCounted == 0) return 0;
 
-        return @floatToInt(usize, @intToFloat(f32, self.framesCounted) / self.total);
+        return @as(usize, @intFromFloat(@as(f32, @floatFromInt(self.framesCounted)) / self.total));
     }
 };

src/engine/opaque_ptr.zig

@@ -3,7 +3,7 @@ const Allocator = std.mem.Allocator;
 
 pub const OpaquePtr = struct {
     allocator: Allocator,
-    object: usize = undefined,
+    ptr: usize = undefined,
     virtualTable: VirtualTable = undefined,
 
     const VirtualTable = struct {
@@ -13,28 +13,37 @@ pub const OpaquePtr = struct {
     pub fn Object(comptime Type: type) type {
         return struct {
             ptr: *Type,
-            opaquePtr: OpaquePtr,
+            opaque_ptr: OpaquePtr,
         };
     }
 
-    pub fn create(comptime Type: type, allocator: Allocator) !Object(Type) {
+    pub fn create(comptime Type: type, allocator: Allocator) !OpaquePtr {
         const ptr = try allocator.create(Type);
-        const opaq = OpaquePtr{
+        return OpaquePtr.init(Type, allocator, ptr);
+    }
+
+    pub fn createObject(comptime Type: type, allocator: Allocator) !Object(Type) {
+        const ptr = try allocator.create(Type);
+        const opaq = OpaquePtr.init(Type, allocator, ptr);
+        return Object(Type){
+            .ptr = ptr,
+            .opaque_ptr = opaq,
+        };
+    }
+
+    fn init(comptime Type: type, allocator: Allocator, ptr: *Type) OpaquePtr {
+        return OpaquePtr{
             .allocator = allocator,
-            .object = @ptrToInt(ptr),
+            .ptr = @intFromPtr(ptr),
             .virtualTable = .{
                 .destroy = struct {
                     fn destroy(self: OpaquePtr) void {
-                        const object = @intToPtr(*Type, self.object);
-                        self.allocator.destroy(object);
+                        const p = @as(*Type, @ptrFromInt(self.ptr));
+                        self.allocator.destroy(p);
                     }
                 }.destroy,
             },
         };
-        return Object(Type){
-            .ptr = ptr,
-            .opaquePtr = opaq,
-        };
     }
 
     pub fn destroy(self: OpaquePtr) void {

src/engine/point.zig

@@ -13,7 +13,7 @@ pub const Point = struct {
     }
 
     pub fn initUsize(x: usize, y: usize) Point {
-        return Point.init(@intCast(i64, x), @intCast(i64, y));
+        return Point.init(@as(i64, @intCast(x)), @as(i64, @intCast(y)));
     }
 
     pub fn add(self: Point, other: Point) Point {
@@ -31,7 +31,7 @@ pub const Point = struct {
     }
 
     pub fn float(self: Point) PointF {
-        return PointF{ .x = @intToFloat(f32, self.x), .y = @intToFloat(f32, self.y) };
+        return PointF{ .x = @as(f32, @floatFromInt(self.x)), .y = @as(f32, @floatFromInt(self.y)) };
     }
 
     pub fn multiply(self: Point, factor: i64) Point {

src/engine/point_f.zig

@@ -37,7 +37,7 @@ pub const PointF = struct {
     }
 
     pub fn integer(self: PointF) Point {
-        return Point{ .x = @floatToInt(i64, self.x), .y = @floatToInt(i64, self.y) };
+        return Point{ .x = @as(i64, @intFromFloat(self.x)), .y = @as(i64, @intFromFloat(self.y)) };
     }
 
     pub fn multiply(self: PointF, factor: f32) PointF {

src/engine/scene.zig

@@ -5,9 +5,9 @@ pub fn Scene(comptime Context: type, comptime Event: type) type {
     return struct {
         const Self = @This();
 
-        object: usize = undefined,
+        scene_ptr: usize = undefined,
         virtualTable: VirtualTable = undefined,
-        opaquePtr: ?OpaquePtr = null,
+        opaque_ptr: ?OpaquePtr = null,
 
         const VirtualTable = struct {
             enter: *const fn (Self, *Context) void,
@@ -37,52 +37,81 @@ pub fn Scene(comptime Context: type, comptime Event: type) type {
             self.virtualTable.tick(self, ctx, t, dt);
         }
 
-        pub fn makeOpaque(comptime SceneType: type, object: *SceneType) Self {
-            return Self{ .object = @ptrToInt(object), .virtualTable = .{
-                .enter = struct {
-                    fn enter(self: Self, ctx: *Context) void {
-                        const scene = @intToPtr(*SceneType, self.object);
-                        scene.enter(ctx);
-                    }
-                }.enter,
-                .exit = struct {
-                    fn exit(self: Self, ctx: *Context) void {
-                        const scene = @intToPtr(*SceneType, self.object);
-                        scene.exit(ctx);
-                    }
-                }.exit,
-                .handle = struct {
-                    fn handle(self: Self, ctx: *Context, event: Event) !void {
-                        const scene = @intToPtr(*SceneType, self.object);
-                        try scene.handle(ctx, event);
-                    }
-                }.handle,
-                .tick = struct {
-                    fn tick(self: Self, ctx: *Context, t: f32, dt: f32) void {
-                        const scene = @intToPtr(*SceneType, self.object);
-                        scene.tick(ctx, t, dt);
-                    }
-                }.tick,
-                .render = struct {
-                    fn render(self: Self, ctx: *Context) void {
-                        const scene = @intToPtr(*SceneType, self.object);
-                        scene.render(ctx);
-                    }
-                }.render,
-            } };
+        pub fn Builder(comptime SceneType: type) type {
+            return struct {
+                const SelfBuilder = @This();
+
+                pub const Object = struct {
+                    ptr: *SceneType,
+                    opaque_ptr: Scene,
+                };
+
+                pub fn init(allocator: std.mem.Allocator) !Self {
+                    const ptr = try OpaquePtr.create(SceneType, allocator);
+                    return SelfBuilder.initOpaque(ptr);
+                }
+
+                pub fn initBuild(allocator: std.mem.Allocator, build: *const fn (*SceneType) void) !Self {
+                    const ptr = try OpaquePtr.createObject(SceneType, allocator);
+                    build(ptr.ptr);
+                    return SelfBuilder.initOpaque(ptr.opaque_ptr);
+                }
+
+                pub fn initObject(allocator: std.mem.Allocator) !Object {
+                    const ptr = try OpaquePtr.createObject(SceneType, allocator);
+                    return Object{
+                        .ptr = ptr.ptr,
+                        .opaque_ptr = SelfBuilder.initOpaque(ptr.opaque_ptr),
+                    };
+                }
+
+                pub fn initOpaque(ptr: OpaquePtr) Self {
+                    return Self{
+                        .scene_ptr = ptr.ptr,
+                        .virtualTable = .{
+                            .enter = struct {
+                                fn enter(self: Self, ctx: *Context) void {
+                                    const scene = @as(*SceneType, @ptrFromInt(self.scene_ptr));
+                                    scene.enter(ctx);
+                                }
+                            }.enter,
+                            .exit = struct {
+                                fn exit(self: Self, ctx: *Context) void {
+                                    const scene = @as(*SceneType, @ptrFromInt(self.scene_ptr));
+                                    scene.exit(ctx);
+                                }
+                            }.exit,
+                            .handle = struct {
+                                fn handle(self: Self, ctx: *Context, event: Event) !void {
+                                    const scene = @as(*SceneType, @ptrFromInt(self.scene_ptr));
+                                    try scene.handle(ctx, event);
+                                }
+                            }.handle,
+                            .tick = struct {
+                                fn tick(self: Self, ctx: *Context, t: f32, dt: f32) void {
+                                    const scene = @as(*SceneType, @ptrFromInt(self.scene_ptr));
+                                    scene.tick(ctx, t, dt);
+                                }
+                            }.tick,
+                            .render = struct {
+                                fn render(self: Self, ctx: *Context) void {
+                                    const scene = @as(*SceneType, @ptrFromInt(self.scene_ptr));
+                                    scene.render(ctx);
+                                }
+                            }.render,
+                        },
+                        .opaque_ptr = ptr,
+                    };
+                }
+            };
         }
 
-        pub fn init(comptime SceneType: type, allocator: std.mem.Allocator, build: ?*const fn (*SceneType) void) !Self {
-            const object = try OpaquePtr.create(SceneType, allocator);
-            var scene = Self.makeOpaque(SceneType, object.ptr);
-            if (build) |b| {
-                b(object.ptr);
-            }
-            return scene;
+        pub fn init(comptime SceneType: type, allocator: std.mem.Allocator) !Self {
+            return Builder(SceneType).init(allocator);
         }
 
         pub fn deinit(self: Self) void {
-            if (self.opaquePtr) |ptr| {
+            if (self.opaque_ptr) |ptr| {
                 ptr.destroy();
             }
         }

src/engine/viewport.zig

@@ -22,7 +22,7 @@ pub const Viewport = struct {
             .actualHeight = height,
             .scaledWidth = width,
             .scaledHeight = height,
-            .bounds = RectangleF.initRelative(0, 0, @intToFloat(f32, width), @intToFloat(f32, height)),
+            .bounds = RectangleF.initRelative(0, 0, @as(f32, @floatFromInt(width)), @as(f32, @floatFromInt(height))),
             .scale = 1.0,
         };
     }
@@ -32,7 +32,7 @@ pub const Viewport = struct {
     }
 
     pub fn scaledInteger(self: Viewport, i: i32) i32 {
-        return @floatToInt(i32, std.math.round(@intToFloat(f32, i) * self.scale));
+        return @as(i32, @intFromFloat(std.math.round(@as(f32, @floatFromInt(i)) * self.scale)));
     }
 
     pub fn viewToScreen(self: Viewport, x: f32, y: f32) PointF {
@@ -49,20 +49,25 @@ pub const Viewport = struct {
         self.actualWidth = width;
         self.actualHeight = height;
 
-        const horizontalRatio = @intToFloat(f32, width) / @intToFloat(f32, self.unscaledWidth);
-        const verticalRatio = @intToFloat(f32, height) / @intToFloat(f32, self.unscaledHeight);
+        const widthF = @as(f32, @floatFromInt(width));
+        const heightF = @as(f32, @floatFromInt(height));
+        const unscaledWidthF = @as(f32, @floatFromInt(self.unscaledWidth));
+        const unscaledHeightF = @as(f32, @floatFromInt(self.unscaledHeight));
+
+        const horizontalRatio = widthF / unscaledWidthF;
+        const verticalRatio = heightF / unscaledHeightF;
 
         if (horizontalRatio < verticalRatio) {
             self.scaledWidth = width;
-            self.scaledHeight = @floatToInt(i32, horizontalRatio * @intToFloat(f32, self.unscaledHeight));
+            self.scaledHeight = @as(i32, @intFromFloat(horizontalRatio * unscaledHeightF));
             const top = @divFloor(height - self.scaledHeight, 2);
-            self.bounds = RectangleF.initRelative(0, @intToFloat(f32, top), @intToFloat(f32, width), @intToFloat(f32, self.scaledHeight));
+            self.bounds = RectangleF.initRelative(0, @as(f32, @floatFromInt(top)), widthF, @as(f32, @floatFromInt(self.scaledHeight)));
             self.scale = horizontalRatio;
         } else {
-            self.scaledWidth = @floatToInt(i32, verticalRatio * @intToFloat(f32, self.unscaledWidth));
+            self.scaledWidth = @as(i32, @intFromFloat(verticalRatio * unscaledWidthF));
             self.scaledHeight = height;
             const left = @divFloor(width - self.scaledWidth, 2);
-            self.bounds = RectangleF.initRelative(@intToFloat(f32, left), 0, @intToFloat(f32, self.scaledWidth), @intToFloat(f32, height));
+            self.bounds = RectangleF.initRelative(@as(f32, @floatFromInt(left)), 0, @as(f32, @floatFromInt(self.scaledWidth)), heightF);
             self.scale = verticalRatio;
         }
     }

src/game/animation.zig

@@ -44,7 +44,7 @@ pub const Animation = struct {
     pub fn tick(self: *Animation, t: f32) void {
         const delta = t - self.lastUpdate;
 
-        const skip = @floatToInt(usize, @divFloor(delta, self.interval));
+        const skip = @as(usize, @intFromFloat(@divFloor(delta, self.interval)));
         self.lastUpdate = t - @rem(delta, self.interval);
 
         self.current = self.currentOffset(skip);

src/game/game.zig

@@ -111,17 +111,17 @@ pub const Game = struct {
             self.playerVelocity.y = 0.1;
         }
         if (self.playerVelocity.x != 0) {
-            const playerTileTop = @floatToInt(i64, std.math.floor(self.playerPosition.y));
-            const playerTileBottom = @floatToInt(i64, std.math.floor(self.playerPosition.y + 0.99));
+            const playerTileTop = @as(i64, @intFromFloat(std.math.floor(self.playerPosition.y)));
+            const playerTileBottom = @as(i64, @intFromFloat(std.math.floor(self.playerPosition.y + 0.99)));
             if (self.playerVelocity.x < 0) {
-                const playerTileLeft = @floatToInt(i64, std.math.ceil(self.playerPosition.x)) - 1;
+                const playerTileLeft = @as(i64, @intFromFloat(std.math.ceil(self.playerPosition.x))) - 1;
                 if (self.level.tiles.get(playerTileLeft, playerTileTop) != null or self.level.tiles.get(playerTileLeft, playerTileBottom) != null) {
                     self.playerPosition.x = std.math.ceil(self.playerPosition.x);
                     self.playerVelocity.x = 0;
                 }
             }
             if (self.playerVelocity.x > 0) {
-                const playerTileRight = @floatToInt(i64, std.math.floor(self.playerPosition.x)) + 1;
+                const playerTileRight = @as(i64, @intFromFloat(std.math.floor(self.playerPosition.x))) + 1;
                 if (self.level.tiles.get(playerTileRight, playerTileTop) != null or self.level.tiles.get(playerTileRight, playerTileBottom) != null) {
                     self.playerPosition.x = std.math.floor(self.playerPosition.x);
                     self.playerVelocity.x = 0;
@@ -158,17 +158,17 @@ pub const Game = struct {
     }
 
     pub fn playerIsOnTile(self: Game) bool {
-        const playerTileHeight = @floatToInt(i64, std.math.floor(self.playerPosition.y)) + 1;
-        const playerTileLeft = @floatToInt(i64, std.math.floor(self.playerPosition.x + 0.5));
-        const playerTileRight = @floatToInt(i64, std.math.ceil(self.playerPosition.x - 0.5));
+        const playerTileHeight = @as(i64, @intFromFloat(std.math.floor(self.playerPosition.y))) + 1;
+        const playerTileLeft = @as(i64, @intFromFloat(std.math.floor(self.playerPosition.x + 0.5)));
+        const playerTileRight = @as(i64, @intFromFloat(std.math.ceil(self.playerPosition.x - 0.5)));
 
         return self.level.tiles.get(playerTileLeft, playerTileHeight) != null or self.level.tiles.get(playerTileRight, playerTileHeight) != null;
     }
 
     pub fn playerIsUnderTile(self: Game) bool {
-        const playerTileHeight = @floatToInt(i64, std.math.ceil(self.playerPosition.y)) - 1;
-        const playerTileLeft = @floatToInt(i64, std.math.floor(self.playerPosition.x + 0.5));
-        const playerTileRight = @floatToInt(i64, std.math.ceil(self.playerPosition.x - 0.5));
+        const playerTileHeight = @as(i64, @intFromFloat(std.math.ceil(self.playerPosition.y))) - 1;
+        const playerTileLeft = @as(i64, @intFromFloat(std.math.floor(self.playerPosition.x + 0.5)));
+        const playerTileRight = @as(i64, @intFromFloat(std.math.ceil(self.playerPosition.x - 0.5)));
 
         return self.level.tiles.get(playerTileLeft, playerTileHeight) != null or self.level.tiles.get(playerTileRight, playerTileHeight) != null;
     }

src/game/level.zig

@@ -43,7 +43,7 @@ pub const Level = struct {
             defer y += 1;
 
             for (line, 0..) |tile, column| {
-                var x = @intCast(i64, column);
+                const x = @as(i64, @intCast(column));
                 switch (tile) {
                     'P' => character = engine.pt(x, y),
                     'S' => try collectables.set(x, y, .Star),

src/game_scene.zig

@@ -56,11 +56,11 @@ pub const GameScene = struct {
         }
 
         if (ctx.keys.isKeyPressed(allegro.c.ALLEGRO_KEY_LEFT)) {
-            self.game.playerVelocity.x = std.math.max(-maxHorizontalWalkVelocity, self.game.playerVelocity.x - horizontalWalkAcceleration);
+            self.game.playerVelocity.x = @max(-maxHorizontalWalkVelocity, self.game.playerVelocity.x - horizontalWalkAcceleration);
         } else if (ctx.keys.isKeyPressed(allegro.c.ALLEGRO_KEY_RIGHT)) {
-            self.game.playerVelocity.x = std.math.min(maxHorizontalWalkVelocity, self.game.playerVelocity.x + horizontalWalkAcceleration);
+            self.game.playerVelocity.x = @min(maxHorizontalWalkVelocity, self.game.playerVelocity.x + horizontalWalkAcceleration);
         } else {
-            if (std.math.fabs(self.game.playerVelocity.x) > 0.2) {
+            if (@abs(self.game.playerVelocity.x) > 0.2) {
                 self.game.playerVelocity.x = self.game.playerVelocity.x - std.math.sign(self.game.playerVelocity.x) * horizontalWalkAcceleration * dt;
             } else {
                 self.game.playerVelocity.x = 0;
@@ -70,10 +70,10 @@ pub const GameScene = struct {
         if (self.game.playerVelocity.y == 0 and ctx.keys.isKeyPressed(allegro.c.ALLEGRO_KEY_SPACE)) {
             self.game.playerVelocity.y = jumpVelocity;
         } else if (!self.game.playerIsOnTile()) {
-            self.game.playerVelocity.y = std.math.min(maxFallVelocity, self.game.playerVelocity.y + gravity * dt);
+            self.game.playerVelocity.y = @min(maxFallVelocity, self.game.playerVelocity.y + gravity * dt);
         }
 
-        // self.game.playerVelocity.y = std.math.min(maxFallVelocity, self.game.playerVelocity.y + self.game.playerAcceleration.y * dt);
+        // self.game.playerVelocity.y = @min(maxFallVelocity, self.game.playerVelocity.y + self.game.playerAcceleration.y * dt);
         if (self.game.playerVelocity.y != 0) {
             self.game.playerFallingAnimation.tick(t);
             self.game.playerIdleAnimation.reset();
@@ -166,7 +166,7 @@ pub const GameScene = struct {
                     switch (collectable) {
                         .Star => {
                             const distanceToPlayer = engine.pt(x, y).float().distance(self.game.playerPosition);
-                            self.game.drawSpriteFrame("item_star_32", self.game.starAnimation.currentOffset(@floatToInt(usize, @mod(distanceToPlayer * 0.54, 1) * 16)), x, y);
+                            self.game.drawSpriteFrame("item_star_32", self.game.starAnimation.currentOffset(@as(usize, @intFromFloat(@mod(distanceToPlayer * 0.54, 1) * 16))), x, y);
                         },
                         .Exit => {
                             const position = self.game.tileP(engine.pt(x, y).float().subtract(engine.ptF(0.5, 1)));
@@ -196,7 +196,7 @@ pub const GameScene = struct {
         const textColor = allegro.mapRgb(0x48, 0x91, 0x00);
 
         if (self.game.state != .InProgress) {
-            ctx.renderer.textures.get("opaque").?.drawTintedScaled(allegro.mapRgba(0, 0, 0, 191), 0, 0, @intToFloat(f32, ctx.renderer.display.width()), @intToFloat(f32, ctx.renderer.display.height()));
+            ctx.renderer.textures.get("opaque").?.drawTintedScaled(allegro.mapRgba(0, 0, 0, 191), 0, 0, ctx.renderer.display.widthF(), ctx.renderer.display.heightF());
 
             if (self.game.state == .Over) {
                 ctx.renderer.drawTextV("default", textColor, 0.5, 0.2, .Center, "Game over");

src/main.zig

@@ -7,6 +7,7 @@ const Context = @import("context.zig").Context;
 const GameScene = @import("game_scene.zig").GameScene;
 const Palette = @import("palette.zig").Palette;
 const Renderer = @import("renderer.zig").Renderer;
+const Scene = @import("scene.zig").Scene;
 const TitleScene = @import("title_scene.zig").TitleScene;
 
 fn hexColor(hex: []const u8) allegro.Color {
@@ -39,7 +40,8 @@ pub fn main() !void {
 
     allegro.setNewBitmapFlags(allegro.NewBitmapFlags{ .MIN_LINEAR = true, .MAG_LINEAR = true });
     try renderer.textures.addFromFile("opaque", paths.AssetsDir ++ "/images/opaque.png");
-    try renderer.textures.addFromFile("title_untitled", paths.AssetsDir ++ "/images/title_untitled.png");
+    try renderer.textures.addFromFile("title_screen", paths.AssetsDir ++ "/images/title_screen.jpg");
+    try renderer.textures.addFromFile("main_menu", paths.AssetsDir ++ "/images/main_menu.jpg");
     try renderer.textures.addFromFile("background_jungle", paths.AssetsDir ++ "/images/background_jungle.png");
 
     allegro.setNewBitmapFlags(allegro.NewBitmapFlags{ .MIN_LINEAR = false, .MAG_LINEAR = false });
@@ -60,12 +62,12 @@ pub fn main() !void {
 
     allegro.convertMemoryBitmaps();
 
-    try context.registerFonts();
+    try renderer.registerFonts();
 
-    try context.switchToScene(GameScene, null);
+    context.switchToScene(TitleScene) catch unreachable;
 
     var t = allegro.getTime();
-    var fpsBuffer = [_]u8{0} ** 32;
+    const fpsBuffer = [_]u8{0} ** 32;
     _ = fpsBuffer;
     while (!context.shouldQuit) {
         const scene = if (context.scene) |scene| scene else {
@@ -73,10 +75,10 @@ pub fn main() !void {
         };
 
         const newT = allegro.getTime();
-        const deltaT = @floatCast(f32, newT - t);
+        const deltaT = @as(f32, @floatCast(newT - t));
         t = newT;
         context.fps.update(deltaT);
-        scene.tick(&context, @floatCast(f32, t), deltaT);
+        scene.tick(&context, @as(f32, @floatCast(t)), deltaT);
 
         while (!context.events.isEmpty()) {
             var event: allegro.Event = undefined;
@@ -84,9 +86,8 @@ pub fn main() !void {
             switch (event.type) {
                 allegro.c.ALLEGRO_EVENT_DISPLAY_CLOSE => context.quit(),
                 allegro.c.ALLEGRO_EVENT_DISPLAY_RESIZE => {
-                    context.renderer.resized(event.display.width, event.display.height);
-                    try context.registerFonts();
                     _ = allegro.acknowledgeResize(allegro.Display{ .native = event.display.source.? });
+                    context.renderer.resized();
                 },
                 allegro.c.ALLEGRO_EVENT_KEY_CHAR => {
                     switch (event.keyboard.keycode) {

src/main_menu_scene.zig

@@ -1,6 +1,7 @@
 const allegro = @import("allegro");
 const game = @import("game.zig");
 const Context = @import("context.zig").Context;
+const GameScene = @import("game_scene.zig").GameScene;
 
 pub const MainMenuScene = struct {
     pub fn enter(self: *MainMenuScene, ctx: *Context) void {
@@ -14,12 +15,20 @@ pub const MainMenuScene = struct {
     }
 
     pub fn handle(self: *MainMenuScene, ctx: *Context, event: *allegro.Event) !void {
-        _ = event;
-        _ = ctx;
+        switch (event.type) {
+            allegro.c.ALLEGRO_EVENT_KEY_CHAR => {
+                switch (event.keyboard.keycode) {
+                    allegro.c.ALLEGRO_KEY_SPACE, allegro.c.ALLEGRO_KEY_ENTER => try ctx.switchToScene(GameScene),
+                    else => {},
+                }
+            },
+            else => {},
+        }
         _ = self;
     }
 
-    pub fn update(self: *MainMenuScene, ctx: *Context, dt: f32) void {
+    pub fn tick(self: *MainMenuScene, ctx: *Context, t: f32, dt: f32) void {
+        _ = t;
         _ = self;
         _ = dt;
         _ = ctx;
@@ -29,10 +38,8 @@ pub const MainMenuScene = struct {
         _ = self;
         allegro.clearToColor(ctx.palette.background.background);
 
-        const center = ctx.viewport.center();
-        ctx.textures.get("title_untitled").?.drawTintedCenteredScaled(ctx.palette.background.text, center.x, ctx.viewport.bounds.min.y + ctx.viewport.scale * 100, 0.5 * ctx.viewport.scale);
-
-        ctx.renderer.drawTextV("default", ctx.palette.background.text, 0, 0.3, game.Renderer.TextAlignment.Center, "Play game");
-        allegro.drawText(ctx.fonts.get("default").?, ctx.palette.background.text, center.x, ctx.viewport.bounds.min.y + ctx.viewport.scale * 200, allegro.DrawTextFlags.ALIGN_CENTER, "Play game");
+        ctx.renderer.drawBackground("main_menu");
+        ctx.renderer.drawTextV("default", ctx.palette.background.text, 0.5, 0.5, .Center, "Press [enter] to");
+        ctx.renderer.drawTextV("default", ctx.palette.background.text, 0.5, 0.56, .Center, "play the game.");
     }
 };

src/renderer.zig

@@ -1,6 +1,7 @@
 const std = @import("std");
 const allegro = @import("allegro");
 const engine = @import("engine.zig");
+const paths = @import("paths.zig");
 const Context = @import("context.zig").Context;
 
 pub const Renderer = struct {
@@ -45,6 +46,12 @@ pub const Renderer = struct {
         self.display.destroy();
     }
 
+    pub fn drawBackground(self: Renderer, textureName: []const u8) void {
+        if (self.textures.get(textureName)) |texture| {
+            allegro.drawScaledBitmap(texture, 0, 0, texture.widthF(), texture.heightF(), 0, 0, self.display.widthF(), self.display.heightF(), .{});
+        }
+    }
+
     pub fn drawSpriteFrame(self: Renderer, spriteName: []const u8, frame: usize, x: f32, y: f32) void {
         if (self.sprites.getFrame(spriteName, frame)) |sprite| {
             sprite.drawScaledUniform(x, y, self.viewport.scale);
@@ -103,8 +110,19 @@ pub const Renderer = struct {
         self.printText(font, color, screen.x, screen.y, alignment, fmt, args);
     }
 
-    pub fn resized(self: *Renderer, width: i32, height: i32) void {
-        self.viewport.update(width, height);
+    pub fn registerFonts(self: *Renderer) !void {
+        const viewport = self.viewport;
+        const fonts = &self.fonts;
+        try fonts.addFromFileTTF("default", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(32));
+        try fonts.addFromFileTTF("small", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(16));
+        try fonts.addFromFileTTF("extra-small", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(12));
+        try fonts.addFromFileTTF("large", paths.AssetsDir ++ "/fonts/Pixellari.ttf", viewport.scaledInteger(64));
+        try fonts.addFromFileTTF("debug", paths.AssetsDir ++ "/fonts/Cabin-Regular.ttf", viewport.scaledInteger(16));
+    }
+
+    pub fn resized(self: *Renderer) void {
+        self.viewport.update(self.display.width(), self.display.height());
+        self.registerFonts() catch {};
     }
 
     pub fn takeScreenshot(self: Renderer) !void {
@@ -113,8 +131,8 @@ pub const Renderer = struct {
     }
 
     pub fn toggleFullScreen(self: *Renderer) void {
-        var displayFlags = allegro.getDisplayFlags(self.display);
+        const displayFlags = allegro.getDisplayFlags(self.display);
         _ = allegro.setDisplayFlag(self.display, allegro.NewDisplayFlags{ .FULLSCREEN_WINDOW = true }, !displayFlags.FULLSCREEN_WINDOW);
-        self.viewport.update(self.display.width(), self.display.height());
+        self.resized();
     }
 };

src/title_scene.zig

@@ -19,7 +19,7 @@ pub const TitleScene = struct {
         switch (event.type) {
             allegro.c.ALLEGRO_EVENT_KEY_CHAR => {
                 switch (event.keyboard.keycode) {
-                    allegro.c.ALLEGRO_KEY_SPACE => try ctx.switchToScene(MainMenuScene, null),
+                    allegro.c.ALLEGRO_KEY_SPACE, allegro.c.ALLEGRO_KEY_ENTER => try ctx.switchToScene(MainMenuScene),
                     else => {},
                 }
             },
@@ -38,9 +38,6 @@ pub const TitleScene = struct {
     pub fn render(self: *TitleScene, ctx: *Context) void {
         _ = self;
         allegro.clearToColor(ctx.palette.background.background);
-        ctx.textures.get("opaque").?.drawTintedScaled(ctx.palette.tertiaryContainer.background, ctx.viewport.bounds.min.x, ctx.viewport.bounds.min.y, ctx.viewport.bounds.width(), ctx.viewport.bounds.height(), allegro.DrawFlags{});
-
-        const center = ctx.viewport.center();
-        ctx.textures.get("title_untitled").?.drawTintedCenteredScaled(ctx.palette.background.text, center.x, center.y, ctx.viewport.scale);
+        ctx.renderer.drawBackground("title_screen");
     }
 };