chore: add ZigGBA

Also get a ZigGBA implementation of first.gba working

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "lib/ZigGBA"]
+	path = lib/ZigGBA
+	url = https://github.com/wendigojaeger/ZigGBA

build.zig

@@ -1,34 +1,7 @@
 const std = @import("std");
+const GBABuilder = @import("lib/ZigGBA/GBA/builder.zig");
 
 pub fn build(b: *std.build.Builder) void {
-    // Standard target options allows the person running `zig build` to choose
+    const exe = GBABuilder.addGBAExecutable(b, "first", "src/first.zig");
-    // what target to build for. Here we do not override the defaults, which
+    _ = exe;
-    // means any target is allowed, and the default is native. Other options
-    // for restricting supported target set are available.
-    const target = b.standardTargetOptions(.{});
-
-    // Standard release options allow the person running `zig build` to select
-    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
-    const mode = b.standardReleaseOptions();
-
-    const exe = b.addExecutable("test-roms", "src/main.zig");
-    exe.setTarget(target);
-    exe.setBuildMode(mode);
-    exe.install();
-
-    const run_cmd = exe.run();
-    run_cmd.step.dependOn(b.getInstallStep());
-    if (b.args) |args| {
-        run_cmd.addArgs(args);
-    }
-
-    const run_step = b.step("run", "Run the app");
-    run_step.dependOn(&run_cmd.step);
-
-    const exe_tests = b.addTest("src/main.zig");
-    exe_tests.setTarget(target);
-    exe_tests.setBuildMode(mode);
-
-    const test_step = b.step("test", "Run unit tests");
-    test_step.dependOn(&exe_tests.step);
 }

lib/ZigGBA

@@ -0,0 +1 @@
+Subproject commit 713a22f6d0613052be932ec768f763d36830dcd9

src/first.zig

@@ -0,0 +1,18 @@
+const GBA = @import("gba").GBA;
+const Mode3 = @import("gba").Mode3;
+const LCD = @import("gba").LCD;
+
+export var gameHeader linksection(".gbaheader") = GBA.Header.setup("FIRST", "AFSE", "00", 0);
+
+pub fn main() noreturn {
+    LCD.setupDisplayControl(.{
+        .mode = .Mode3,
+        .backgroundLayer2 = .Show,
+    });
+
+    Mode3.setPixel(120, 80, GBA.toNativeColor(31, 0, 0));
+    Mode3.setPixel(136, 80, GBA.toNativeColor(0, 31, 0));
+    Mode3.setPixel(120, 96, GBA.toNativeColor(0, 0, 31));
+
+    while (true) {}
+}

src/main.zig

@@ -1,9 +0,0 @@
-const std = @import("std");
-
-pub fn main() anyerror!void {
-    std.log.info("All your codebase are belong to us.", .{});
-}
-
-test "basic test" {
-    try std.testing.expectEqual(10, 3 + 7);
-}