initial commit

6 files changed, 161 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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index 0000000..fe95f8d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/zig-*
diff --git a/.gitmodules b/.gitmodules
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index 0000000..fd59bb0
--- /dev/null
+++ b/.gitmodules
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+[submodule "SDL.zig"]
+	path = SDL.zig
+	url = https://github.com/MasterQ32/SDL.zig
diff --git a/SDL.zig b/SDL.zig
new file mode 160000
+Subproject fbe5f599c65b7a5642990443b2a686d1c53a498
diff --git a/build.zig b/build.zig
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index 0000000..7ca8105
--- /dev/null
+++ b/build.zig
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+const std = @import("std");
+const Sdk = @import("SDL.zig/Sdk.zig");
+
+// Although this function looks imperative, note that its job is to
+// declaratively construct a build graph that will be executed by an external
+// runner.
+pub fn build(b: *std.Build) void {
+    // Standard target options allows the person running `zig build` to choose
+    // what target to build for. Here we do not override the defaults, which
+    // means any target is allowed, and the default is native. Other options
+    // for restricting supported target set are available.
+    const target = b.standardTargetOptions(.{});
+
+    const sdk = Sdk.init(b, null);
+
+    // Standard optimization options allow the person running `zig build` to select
+    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
+    // set a preferred release mode, allowing the user to decide how to optimize.
+    const optimize = b.standardOptimizeOption(.{});
+
+    const exe = b.addExecutable(.{
+        .name = "zxc",
+        // 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" },
+        .target = target,
+        .optimize = optimize,
+    });
+    sdk.link(exe, .dynamic);
+
+    exe.addModule("sdl2", sdk.getWrapperModule());
+
+    // 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`).
+    b.installArtifact(exe);
+
+    // This *creates* a Run step in the build graph, to be executed when another
+    // step is evaluated that depends on it. The next line below will establish
+    // such a dependency.
+    const run_cmd = b.addRunArtifact(exe);
+
+    // By making the run step depend on the install step, it will be run from the
+    // installation directory rather than directly from within the cache directory.
+    // This is not necessary, however, if the application depends on other installed
+    // files, this ensures they will be present and in the expected location.
+    run_cmd.step.dependOn(b.getInstallStep());
+
+    // 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| {
+        run_cmd.addArgs(args);
+    }
+
+    // This creates a build step. It will be visible in the `zig build --help` menu,
+    // and can be selected like this: `zig build run`
+    // This will evaluate the `run` step rather than the default, which is "install".
+    const run_step = b.step("run", "Run the app");
+    run_step.dependOn(&run_cmd.step);
+
+    // Creates a step for unit testing. This only builds the test executable
+    // but does not run it.
+    const unit_tests = b.addTest(.{
+        .root_source_file = .{ .path = "src/main.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const run_unit_tests = b.addRunArtifact(unit_tests);
+
+    // Similar to creating the run step earlier, this exposes a `test` step to
+    // the `zig build --help` menu, providing a way for the user to request
+    // running the unit tests.
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&run_unit_tests.step);
+}
diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..4a5c92c
--- /dev/null
+++ b/src/main.zig
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+const std = @import("std");
+const zxc = @import("zxc.zig");
+
+pub fn main() !void {
+    var z = try zxc.init(.{
+        .width = 400,
+        .height = 224,
+        .target_fps = 60,
+    });
+    defer z.deinit();
+}
diff --git a/src/zxc.zig b/src/zxc.zig
new file mode 100644
index 0000000..f394f7d
--- /dev/null
+++ b/src/zxc.zig
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+const std = @import("std");
+const sdl = @import("sdl2");
+const Self = @This();
+
+const Config = struct {
+    const RenderMode = enum {
+        Pixel,
+        PixelPerfect,
+        HdRender,
+    };
+
+    width: usize,
+    height: usize,
+    scale: usize = 1,
+    target_fps: usize,
+    render: RenderMode = .Pixel,
+    title: [:0]const u8 = "ZXC",
+};
+
+config: Config,
+window: sdl.Window,
+renderer: sdl.Renderer,
+
+pub fn init(config: Config) !Self {
+    var self = Self{
+        .config = config,
+        .window = undefined,
+        .renderer = undefined,
+    };
+
+    try sdl.init(.{ .video = true });
+    errdefer sdl.quit();
+
+    const basepath = sdl.c.SDL_GetBasePath();
+    if (basepath == null)
+        return sdl.makeError();
+    defer sdl.c.SDL_free(basepath);
+
+    try std.os.chdir(std.mem.span(basepath));
+
+    self.window = try sdl.createWindow(
+        config.title,
+        sdl.WindowPosition.default,
+        sdl.WindowPosition.default,
+        config.width,
+        config.height,
+        .{ .resizable = true },
+    );
+    errdefer self.window.destroy();
+
+    self.renderer = try sdl.createRenderer(
+        self.window,
+        null,
+        sdl.RendererFlags{ .accelerated = true },
+    );
+    errdefer self.renderer.destroy();
+
+    _ = sdl.setHint(
+        sdl.hint.render_scale_quality,
+        if (config.render == .HdRender) "1" else "0",
+    );
+
+    return self;
+}
+
+pub fn deinit(self: Self) void {
+    self.renderer.destroy();
+    self.window.destroy();
+    sdl.quit();
+}