build maps on 'zig build'

Signed-off-by: Christine Dodrill <me@christine.website>

build.zig

@@ -1,69 +1,29 @@
 const std = @import("std");
 
-// Returns true if the version includes https://github.com/ziglang/zig/pull/10572/commits.
-// When this is false, trying to place the stack first will result in data corruption.
-fn version_supports_stack_first(zig_version: std.SemanticVersion) !bool {
-    if (zig_version.order(try std.SemanticVersion.parse("0.10.0")).compare(.gte)) {
-        // Merged here: https://github.com/ziglang/zig/pull/10572
-        return true;
-    }
-    if (zig_version.major == 0 and zig_version.minor == 10) {
-        // Check for 0.10.0-dev.258+. Conservatively check the prefix of the tag
-        // in case zig uses other prefixes that don't respect semver ordering.
-        if (zig_version.pre) |pre| {
-            // Merged here: https://github.com/ziglang/zig/pull/10572
-            return std.mem.startsWith(u8, pre, "dev.") and zig_version.order(try std.SemanticVersion.parse("0.10.0-dev.258")).compare(.gte);
-        }
-    }
-    // Backported here: https://github.com/ziglang/zig/commit/6f49233ac6a6569b909b689f22fc260dc8c19234
-    return zig_version.order(try std.SemanticVersion.parse("0.9.1")).compare(.gte);
-}
+pub fn mapgen(b: *std.build.Step) !void {
+    _ = b;
 
-test "stack version check" {
-    const expect = std.testing.expect;
-    const parse = std.SemanticVersion.parse;
-    try expect(!try version_supports_stack_first(try parse("0.8.0")));
-
-    try expect(!try version_supports_stack_first(try parse("0.9.0")));
-    try expect(!try version_supports_stack_first(try parse("0.9.1-dev.259")));
-    try expect(try version_supports_stack_first(try parse("0.9.1")));
-
-    // Conservatively don't recognize tags other than 'dev'.
-    try expect(!try version_supports_stack_first(try parse("0.10.0-aev.259")));
-    try expect(!try version_supports_stack_first(try parse("0.10.0-zev.259")));
-
-    try expect(!try version_supports_stack_first(try parse("0.10.0-dev.257")));
-    try expect(try version_supports_stack_first(try parse("0.10.0-dev.258")));
-    try expect(try version_supports_stack_first(try parse("0.10.0-dev.259")));
-    try expect(try version_supports_stack_first(try parse("0.10.0")));
-
-    try expect(try version_supports_stack_first(try parse("0.10.1-dev.100")));
-    try expect(try version_supports_stack_first(try parse("0.10.1-dev.300")));
-    try expect(try version_supports_stack_first(try parse("0.10.1")));
-
-    try expect(try version_supports_stack_first(try parse("1.0.0")));
+    var alloc = std.heap.page_allocator;
+    var deno = std.ChildProcess.init(&.{"deno", "run", "-A", "./src/tools/genmap.js", "./maps/TestMap.json", "./src/maps/testmap.zig"}, alloc);
+    try deno.spawn();
+    _ = try deno.wait();
 }
 
 pub fn build(b: *std.build.Builder) !void {
-    const zig_version = @import("builtin").zig_version;
+    const map_step = b.step("mapgen", "generate maps");
+    map_step.makeFn = mapgen;
+
     const mode = b.standardReleaseOptions();
     const lib = b.addSharedLibrary("cart", "src/main.zig", .unversioned);
+    lib.step.dependOn(map_step);
+
     lib.setBuildMode(mode);
     lib.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding });
     lib.import_memory = true;
     lib.initial_memory = 65536;
     lib.max_memory = 65536;
-    if (try version_supports_stack_first(zig_version)) {
-        lib.stack_size = 14752;
-    } else {
-        // `--stack-first` option have been reenabled on wasm targets with https://github.com/ziglang/zig/pull/10572
-        std.log.warn("Update to Zig >=0.9.1 (or >=0.10.0-dev.258 for nightly) to detect stack overflows at runtime.", .{});
-        lib.global_base = 6560;
-        lib.stack_size = 8192;
-    }
-    // Workaround https://github.com/ziglang/zig/issues/2910, preventing
-    // functions from compiler_rt getting incorrectly marked as exported, which
-    // prevents them from being removed even if unused.
+    lib.stack_size = 14752;
+
     lib.export_symbol_names = &[_][]const u8{ "start", "update" };
     lib.install();
 }

src/main.zig

@@ -14,6 +14,8 @@ var mara_box: Rect = Rect{.base = Point{.x = 20, .y = 40}, .width = 16, .height
 var mara_speed: i32 = 0;
 var screen = Rect{.base = Point{.x = 0, .y = 0}, .width = 160, .height = 160};
 
+var sound_timer: u8 = 0;
+
 var textBuf: [160]u8 = undefined;
 
 export fn start() void {
@@ -22,6 +24,32 @@ export fn start() void {
 
 const map = @import("./maps/testmap.zig");
 
+fn bonk() void {
+    if (sound_timer != 0) {
+        return;
+    }
+
+    w4.tone(
+        w4.Tone.Frequency{.start = 220, .end = 40},
+        w4.Tone.Duration{
+            .attack = 0,
+            .decay = 0,
+            .sustain = 6,
+            .release = 6,
+        },
+        w4.Tone.Volume{
+            .sustain = 100,
+            .attack = 100,
+        },
+        w4.Tone.Flags{
+            .channel = .triangle,
+            .pulse_duty = .@"1/2",
+        },
+    );
+
+    sound_timer = 12;
+}
+
 fn drawMap() !void {
     w4.m.colors.* = .{
         ._0 = .p0,
@@ -48,17 +76,7 @@ fn drawMap() !void {
     }
 }
 
-export fn update() void {
-    // w4.m.colors._0 = .p3;
-    // w4.m.colors._1 = .p0;
-    // w4.text("Mara 2:\nTamamo's Fury", 10, 10);
-
-    drawMap() catch unreachable;
-
-    const gamepad = w4.m.gamepads[0];
-
-    var old_speed = mara_speed;
-
+fn move_mara(gamepad: w4.GamePad) void {
     mara_speed -= 1;
     if (mara_speed < 0) {
         mara_speed = 0;
@@ -91,11 +109,41 @@ export fn update() void {
             mara_box.base.x += mara_speed;
         },
     }
+}
+
+export fn update() void {
+    if (sound_timer != 0) {
+        sound_timer -= 1;
+    }
+
+    drawMap() catch unreachable;
+
+    // w4.m.colors._0 = .p3;
+    // w4.m.colors._1 = .p0;
+    // w4.text("Mara 2:\nTamamo's Fury", 10, 10);
+
+    const gamepad = w4.m.gamepads[0];
+    const old_speed = mara_speed;
+    move_mara(gamepad);
 
     for (map.coll) |box| {
         if (mara_box.collides(box)) {
-            w4.trace("boncc");
+            switch (mara_direction) {
+                .Up => {
+                    mara_box.base.y += mara_speed;
+                },
+                .Down => {
+                    mara_box.base.y -= mara_speed;
+                },
+                .Left => {
+                    mara_box.base.x += mara_speed;
+                },
+                .Right => {
+                    mara_box.base.x -= mara_speed;
+                },
+            }
             mara_speed = 0;
+            bonk();
         }
     }
 

src/maps/testmap.zig

@@ -1,3 +1,5 @@
+// Generated by genmap.js, DO NOT EDIT
+
 const sh0rk = @import("../sh0rk.zig");
 const Point = sh0rk.Point;
 const Rect = sh0rk.Rect;

src/tools/genmap.js

@@ -11,6 +11,7 @@ var out = "";
 const data = await Deno.readTextFile(mapFile);
 const map = JSON.parse(data);
 
+out += `// Generated by genmap.js, DO NOT EDIT\n\n`;
 
 out += `const sh0rk = @import("../sh0rk.zig");\n`;
 

src/wasm4.zig

@@ -183,7 +183,7 @@ pub extern fn hline(x: u32, y: u32, len: u32) void;
 /// volume: Volume of the sustain and attack durations, between 0 and 100.
 pub fn tone(frequency: Tone.Frequency, duration: Tone.Duration, volume: Tone.Volume, flags: Tone.Flags) void {
     std.debug.assert(volume.is_valid());
-    tone(@bitCast(u32, frequency), @bitCast(u32, duration), @bitCast(u32, volume), @bitCast(u32, flags));
+    raw_api.tone(@bitCast(u32, frequency), @bitCast(u32, duration), @bitCast(u32, volume), @bitCast(u32, flags));
 }
 
 pub const Tone = struct {
@@ -219,6 +219,7 @@ pub const Tone = struct {
     pub const Volume = packed struct {
         sustain : u8,
         attack  : u8 = 100,
+        _reserved: u16 = 0,
 
         pub fn is_valid(volume: @This()) bool {
             return (0 <= volume.sustain) and (volume.sustain <= 100)
@@ -230,6 +231,7 @@ pub const Tone = struct {
         channel: Channel,
         pulse_duty: DutyCycle = 2,
         pan: Pan = .both,
+        _reserved: u26 = 0,
     };
 
     pub const Channel = enum(u2) {