build: examples run independently & sysaudio examples renamed as tests

examples/core-triangle/App.zig

@@ -0,0 +1,138 @@
+const mach = @import("mach");
+const gpu = mach.gpu;
+
+pub const name = .app;
+pub const Mod = mach.Mod(@This());
+
+pub const systems = .{
+    .start = .{ .handler = start },
+    .init = .{ .handler = init },
+    .deinit = .{ .handler = deinit },
+    .tick = .{ .handler = tick },
+};
+
+title_timer: mach.time.Timer,
+pipeline: *gpu.RenderPipeline,
+
+pub fn deinit(core: *mach.Core.Mod, app: *Mod) void {
+    app.state().pipeline.release();
+    core.schedule(.deinit);
+}
+
+fn start(app: *Mod, core: *mach.Core.Mod) !void {
+    core.schedule(.init);
+    app.schedule(.init);
+}
+
+fn init(app: *Mod, core: *mach.Core.Mod) !void {
+    core.state().on_tick = app.system(.tick);
+    core.state().on_exit = app.system(.deinit);
+
+    // Create our shader module
+    const shader_module = core.state().device.createShaderModuleWGSL("shader.wgsl", @embedFile("shader.wgsl"));
+    defer shader_module.release();
+
+    // Blend state describes how rendered colors get blended
+    const blend = gpu.BlendState{};
+
+    // Color target describes e.g. the pixel format of the window we are rendering to.
+    const color_target = gpu.ColorTargetState{
+        .format = core.get(core.state().main_window, .framebuffer_format).?,
+        .blend = &blend,
+    };
+
+    // Fragment state describes which shader and entrypoint to use for rendering fragments.
+    const fragment = gpu.FragmentState.init(.{
+        .module = shader_module,
+        .entry_point = "frag_main",
+        .targets = &.{color_target},
+    });
+
+    // Create our render pipeline that will ultimately get pixels onto the screen.
+    const label = @tagName(name) ++ ".init";
+    const pipeline_descriptor = gpu.RenderPipeline.Descriptor{
+        .label = label,
+        .fragment = &fragment,
+        .vertex = gpu.VertexState{
+            .module = shader_module,
+            .entry_point = "vertex_main",
+        },
+    };
+    const pipeline = core.state().device.createRenderPipeline(&pipeline_descriptor);
+
+    // Store our render pipeline in our module's state, so we can access it later on.
+    app.init(.{
+        .title_timer = try mach.time.Timer.start(),
+        .pipeline = pipeline,
+    });
+    try updateWindowTitle(core);
+
+    core.schedule(.start);
+}
+
+fn tick(core: *mach.Core.Mod, app: *Mod) !void {
+    while (core.state().nextEvent()) |event| {
+        switch (event) {
+            .close => core.schedule(.exit), // Tell mach.Core to exit the app
+            else => {},
+        }
+    }
+
+    // Grab the back buffer of the swapchain
+    // TODO(Core)
+    const back_buffer_view = core.state().swap_chain.getCurrentTextureView().?;
+    defer back_buffer_view.release();
+
+    // Create a command encoder
+    const label = @tagName(name) ++ ".tick";
+    const encoder = core.state().device.createCommandEncoder(&.{ .label = label });
+    defer encoder.release();
+
+    // Begin render pass
+    const sky_blue_background = gpu.Color{ .r = 0.776, .g = 0.988, .b = 1, .a = 1 };
+    const color_attachments = [_]gpu.RenderPassColorAttachment{.{
+        .view = back_buffer_view,
+        .clear_value = sky_blue_background,
+        .load_op = .clear,
+        .store_op = .store,
+    }};
+    const render_pass = encoder.beginRenderPass(&gpu.RenderPassDescriptor.init(.{
+        .label = label,
+        .color_attachments = &color_attachments,
+    }));
+    defer render_pass.release();
+
+    // Draw
+    render_pass.setPipeline(app.state().pipeline);
+    render_pass.draw(3, 1, 0, 0);
+
+    // Finish render pass
+    render_pass.end();
+
+    // Submit our commands to the queue
+    var command = encoder.finish(&.{ .label = label });
+    defer command.release();
+    core.state().queue.submit(&[_]*gpu.CommandBuffer{command});
+
+    // Present the frame
+    core.schedule(.present_frame);
+
+    // update the window title every second
+    if (app.state().title_timer.read() >= 1.0) {
+        app.state().title_timer.reset();
+        try updateWindowTitle(core);
+    }
+}
+
+fn updateWindowTitle(core: *mach.Core.Mod) !void {
+    try core.state().printTitle(
+        core.state().main_window,
+        "core-custom-entrypoint [ {d}fps ] [ Input {d}hz ]",
+        .{
+            // TODO(Core)
+            core.state().frameRate(),
+            core.state().inputRate(),
+        },
+    );
+    core.schedule(.update);
+}

examples/core-triangle/main.zig

@@ -0,0 +1,24 @@
+const std = @import("std");
+const mach = @import("mach");
+
+// The global list of Mach modules our application may use.
+pub const modules = .{
+    mach.Core,
+    @import("App.zig"),
+};
+
+// TODO: move this to a mach "entrypoint" zig module which handles nuances like WASM requires.
+pub fn main() !void {
+    const allocator = std.heap.c_allocator;
+
+    // Initialize module system
+    try mach.mods.init(allocator);
+
+    // Schedule .app.start to run.
+    mach.mods.schedule(.app, .start);
+
+    // Dispatch systems forever or until there are none left to dispatch. If your app uses mach.Core
+    // then this will block forever and never return.
+    const stack_space = try allocator.alloc(u8, 8 * 1024 * 1024);
+    try mach.mods.dispatch(stack_space, .{});
+}

examples/core-triangle/shader.wgsl

@@ -0,0 +1,14 @@
+@vertex fn vertex_main(
+    @builtin(vertex_index) VertexIndex : u32
+) -> @builtin(position) vec4<f32> {
+    var pos = array<vec2<f32>, 3>(
+        vec2<f32>( 0.0,  0.5),
+        vec2<f32>(-0.5, -0.5),
+        vec2<f32>( 0.5, -0.5)
+    );
+    return vec4<f32>(pos[VertexIndex], 0.0, 1.0);
+}
+
+@fragment fn frag_main() -> @location(0) vec4<f32> {
+    return vec4<f32>(1.0, 0.0, 0.0, 1.0);
+}